ULTRASONIC SENSOR

An ultrasonic sensor (), that transmits probe waves which are ultrasonic waves and acquires detection waves including reflected waves which have been reflected from surrounding objects, includes a transmitter/receiver () that transmits the probe waves and acquires the detection waves, a detection wave processing section () that executes processing for passing a predetermined frequency band which includes the frequency of the probe waves, an amplitude measurement section () which measures the amplitude of the detection waves, and a judgement section () which judges whether there is adherence of foreign matter on the transmitter/receiver, based on a relationship between a time axis and values of the amplitude of the detection waves during a reverberation interval following the termination of transmitting the probe waves. 1. A method of transmitting and receiving from an ultrasonic sensor , the ultrasonic sensor transmitting probe waves , which are ultrasonic waves , and acquiring detection waves that include reflected waves which have been reflected from surrounding objects , the method comprising:transmitting the probe waves and acquiring the detection waves from a single transmitter/receiver;executing filter processing of the detection waves in which frequencies within a predetermined frequency band that includes the frequency of the probe waves are passed;measuring an amplitude of the detection waves; andexecuting a judgement which judges whether there is adherence of foreign matter on the transmitter/receiver, based on a relationship between a time axis and values of the amplitude of the detection waves during a reverberation interval following a termination of the transmitting of the probe waves.2. The method of transmitting and receiving from the ultrasonic sensor according to claim 1 , further comprising:acquiring, as the relationship between the time axis and the amplitude, an interval extending from the point at which the amplitude falls below a first ...

METHOD AND DEVICE FOR DETECTING AN ICE-COVERED ELECTROACOUSTIC SENSOR

A method for detecting a diaphragm of an electroacoustic sensor covered with snow/ice (e.g., an ultrasonic sensor on a vehicle). The method includes: a) after a sensor operation start, a temperature sensor, disposed in the interior of a sensor housing, ascertains a temporal temperature characteristic of an interior of the electroacoustic sensor, where the temperature of the sensor interior at the beginning of the sensor operation is below 0° C. In b), a second time range of the ascertained temperature characteristic is detected by a processing unit in that the temperature increase drops significantly in comparison with a temporally preceding first range. In c), if such a time range is detected, then it is inferred therefrom that the diaphragm of the electroacoustic sensor is covered with snow/ice. In d), if it was detected that a diaphragm of the electroacoustic sensor is covered with snow/ice, a warning is output to the driver. 17-. (canceled)8. A method for detecting a diaphragm of an electroacoustic sensor covered with snow and/or ice , on a vehicle , the method comprising:a) ascertaining a temporal temperature characteristic of an interior of the electroacoustic sensor after a start of sensor operation by a temperature sensor, which is situated in the interior of a housing of the sensor, the temperature of the sensor interior being below 0° C. at the start of the sensor operation;b) detecting a second time range of the ascertained temperature characteristic, in which the temperature increase drops significantly in comparison with a temporally preceding first range, with a processing unit, and if such a time range is detected,c) detecting a diaphragm of the electroacoustic sensor that is coated with snow and/or ice; andd) outputting a warning to the driver.9. The method of claim 8 , wherein in task b) claim 8 , the detection of the second time range takes place in that the processing unit compares the gradient of the ascertained temperature characteristic to the ...

Method and analysis system for determining a state of a diaphragm of an ultrasound sensor

A method and an analysis system for determining a state of a diaphragm of an ultrasound sensor during operation is disclosed. The diaphragm of the ultrasound sensor is excited with a first excitation signal in a predefined first frequency profile. Based on this, a first voltage profile, which depends on a frequency of the first excitation signal, is measured. Analogously, a second voltage profile is determined by applying a second excitation signal to the diaphragm and then carrying out a measurement. These two voltage profiles are shifted so that respective positions of maxima of the two voltage profiles are matched to one another in a predefined frequency range. A third voltage profile, which runs between the shifted first and second voltage profiles, is determined. Based on the third voltage profile, electrical parameters are determined by a model for continuous excitation of the diaphragm to determine the state of the diaphragm.

Acoustic Projector with Source Level Monitoring and Control

In an embodiment, an acoustic projector includes an acoustic transmit transducer capable of producing a sound pressure radiation in response to a driver signal received from a transmit source, an acoustic receive transducer capable of producing a source level signal in response to receiving at least a portion of the sound pressure radiation, and a controller configured to monitor the source level signal and report the source level signal monitored. 1. An acoustic projector comprising:a marine acoustic transmit transducer capable of producing a sound pressure radiation in response to a driver signal received from a transmit source;a voltage monitoring circuit configured to measure a voltage level of the driver signal;a current monitoring circuit configured to measure a current level of the driver signal; anda controller configured to monitor the measured voltage level and the measured current level to derive an indication of impedance of the acoustic transmit transducer based on the monitored voltage level and the monitored current level.2. The acoustic projector of claim 1 , wherein the controller is further configured to report the monitored voltage level.3. The acoustic projector of wherein the controller is further configured to report the monitored voltage level to a remote controller configured to control the drive signal based further on the monitored voltage level.4. The acoustic projector of claim 1 , wherein the controller is further configured to report the monitored current level.5. The acoustic projector of wherein the controller is configured to report the monitored current level to a remote controller configured to control the drive signal based further on the monitored current level.6. The acoustic projector of wherein the controller is configured to control the drive signal based further on the impedance indication.7. The acoustic projector of wherein the controller is configured to determine whether a defect is present based on the impedance ...

Autonomous vehicle glass cleaning system

A glass cleaning system includes: a housing including at least one peripheral sidewalls being substantially perpendicular relative to a side of a vehicle to which the housing is attached, a cover, and a vision system including at least one sensor and processing circuitry, wherein the vision system is disposed in an interior of the housing, the at least one sensor is communicatively coupled to the processing circuitry, and the vision system is configured to be used with the vehicle to detect surrounding objects and determine distances between said objects and the vehicle; a window mounted as the at least one peripheral sidewall of the housing and configured to tilt towards the interior of the housing into an angled orientation and back; a drain duct disposed in the interior of the housing; and at least one spray nozzle.

METHOD AND SYSTEM FOR DETERMINING A QUANTITY OF LIQUID IN A TANK

It is proposed a method for determining a quantity of a liquid in a tank, the tank comprising: a first ultrasound subsystem capable of measuring level of liquid present above a predetermined threshold level within the tank; and at least one second ultrasound subsystem, said second ultrasound subsystem being associated with a sensing area within the tank and being configured to measure a parameter characteristic of the liquid, said sensing area being located below the predetermined threshold level. The method comprises in the steps of: checking the validity of the measurement performed by said first ultrasound subsystem (S); when it is detected that the measurement of said first ultrasound system is not valid: (a) checking (S) the validity of the measurement performed by said second ultrasound subsystem; (b) determining (S S S) a quantity of liquid, which quantity being based on a result of the validity check at step (a). 1. A method for determining a quantity of a liquid in a tank , the tank comprising:a first ultrasound subsystem capable of measuring level of liquid present above a predetermined threshold level within the tank;at least one second ultrasound subsystem, said second ultrasound subsystem being associated with a sensing area within the tank and being configured to measure a parameter characteristic of the liquid, said sensing area being located below the predetermined threshold level,wherein the method comprises the following steps:checking the validity of the measurement performed by said first ultrasound subsystem; (a) checking the validity of the measurement performed by said second ultrasound subsystem;', '(b) determining a quantity of liquid, which quantity being based on a result of the validity check at step (a)., 'when it is detected that the measurement of said first ultrasound system is not valid2. The method according to claim 1 , said first and second ultrasound subsystems being configured to generate a sound wave and to detect an echo of ...

System and Method for Compensating a Motion of a Vehicle Component

A system compensates a motion of a vehicle component relative to another vehicle component or ground. One or more sensors are supported by the vehicle component. The system includes a control unit configured to perform the following acts: receiving sensor data from the one or more sensors; detecting the motion of the vehicle component; and determining compensation data to enable a compensation of deviations in sensor data that are caused by the motion.

Device for monitoring the position of an object by means of sound waves

A device for monitoring the local orientation or position of an object by sound waves, with a sensor part positioned at a distance from the object with at least one sound wave emitter, at least one sound wave receiver, and a computing unit. The computing unit controls the at sound wave emitter and the sound wave receiver and determines the distance between the sensor part and the object, based on the echoes of a sound wave emitted by the sound wave emitter in the direction of the object. An identification reflector separate from the sensor part comprises a three-dimensional pattern. The sensor part has an array of sound wave receivers and sound wave emitters, wherein for identifying the identification reflector and for measuring the distance between the sensor part and the identification reflector, a plurality of echoes between different emitter/receiver-combinations is evaluated.

ULTRASONIC SYSTEM OF A VEHICLE FOR DETERMINING THE CONDITION OF THE ROADWAY

An ultrasonic system of a vehicle. The ultrasonic system includes: at least one ultrasonic sensor for ascertaining a distance of objects from the vehicle by comparing an emitted signal and a reflected echo, and a calculation apparatus for evaluating a measured signal of the ultrasonic sensor. The calculation apparatus is configured to determine a variance of a ground echo distribution within a roadway portion on which the vehicle is moving, and to ascertain the condition of the roadway portion on the basis of at least one predefined classifier that associates individual values of the variance with a roadway condition. 110-. (canceled)11. An ultrasonic system of a vehicle , comprising:at least one ultrasonic sensor configured to ascertain a distance of objects from the vehicle by comparing an emitted signal and a reflected echo; anda calculation apparatus configured to evaluate a measured signal of the ultrasonic sensor, the calculation apparatus further configured to determine a variance of a ground echo distribution within a roadway portion on which the vehicle is moving, and to ascertain a condition of the roadway portion based on at least one predefined classifier that associates individual values of the variance with a roadway condition.12. The ultrasonic system as recited in claim 11 , wherein the calculation apparatus is configured to determine the variance proportionally from:a frequency of occurrence of received ground echoes; and/oran amplitude of the ground echoes; and/ora matching factor of the emitted signal and a ground echo; and/ora clutter level; and/ornoise level.13. A vehicle claim 11 , comprising: at least one ultrasonic sensor configured to ascertain a distance of objects from the vehicle by comparing an emitted signal and a reflected echo; and', 'a calculation apparatus configured to evaluate a measured signal of the ultrasonic sensor, the calculation apparatus further configured to determine a variance of a ground echo distribution within a ...

Method for detecting a blocked state of an ultrasonic sensor of a motor vehicle, ultrasonic sensor apparatus and motor vehicle

The invention relates to a method for detecting a blocked state of an ultrasonic sensor ( 3 ) of a motor vehicle ( 1 ), in which at least one oscillation parameter of the ultrasonic sensor ( 3 ) is recorded and an evaluation device ( 4 ) of the motor vehicle ( 1 ) carries out a detection algorithm which is used to evaluate the at least one oscillation parameter for the purpose of detecting the blocked state. An object ( 9 ) in an area surrounding the motor vehicle ( 1 ) is detected by the evaluation device ( 4 ) on the basis of sensor data from at least one sensor ( 3, 8 ) of the motor vehicle ( 1 ), in which case, when a distance (D) between the object ( 9 ) and the ultrasonic sensor ( 3 ) falls below a predefined threshold value (G), the detection algorithm is not carried out by the evaluation device ( 4 ) or a blocked state of the ultrasonic sensor ( 3 ), as detected using the detection algorithm, is ignored by the evaluation device ( 4 ).

METHOD FOR OPERATING AN ULTRASONIC SENSOR APPARATUS OF A MOTOR VEHICLE, ULTRASONIC SENSOR APPARATUS, AND MOTOR VEHICLE

The invention relates to a method for operating an ultrasonic sensor apparatus () of a motor vehicle (), in which method ultrasound waves are emitted into a surrounding region () of the motor vehicle () by at least one ultrasonic sensor () of the ultrasonic sensor apparatus () in order to carry out a distance measurement, wherein an exhaust gas cloud () which is emitted into the surrounding region () by an exhaust system () of the motor vehicle () and at which the ultrasound waves are reflected is detected by the ultrasonic sensor apparatus () on the basis of sensor data from at least one sensor () of the motor vehicle (), which at least one sensor is different from the ultrasonic sensor (), and the ultrasonic sensor apparatus () is operated depending on the detection of the exhaust gas cloud (). 1. A method for operating an ultrasonic sensor apparatus of a motor vehicle , comprising:emitting ultrasound waves into a surrounding region of the motor vehicle by at least one ultrasonic sensor of the ultrasonic sensor apparatus in order to carry out a distance measurement;detecting, by the ultrasonic sensor apparatus, an exhaust gas cloud which is emitted into the surrounding region by an exhaust system of the motor vehicle at which the ultrasound waves are reflected, wherein the exhaust gas cloud is detected on the basis of sensor data from at least one sensor of the motor vehicle different from the ultrasonic sensor; andoperating the ultrasonic sensor apparatus depending on the detection of the exhaust gas cloud.2. The method according to claim 1 , wherein the detection of the exhaust gas cloud comprises a probability value claim 1 , which indicates the current probability of the presence of the exhaust gas cloud claim 1 , being calculated depending on the sensor data claim 1 , and the exhaust gas cloud being detected when the probability value is greater than a predetermined limit value.3. The method according to claim 1 , wherein the exhaust gas cloud is detected ...

SHORT RANGE ULTRASONIC MEASUREMENT

A system has an actuator with a first surface and a second surface, the first surface being offset a step dimension from the second surface. A sensor is configured to measure a distance between the sensor and both the first surface and the second surface via a signal received by the sensor after having reflected off the first surface or the second surface. The step dimension is greater than a minimum dimension, which is defined in view of a medium through which the actuator moves and a frequency of the signal. 1. A system comprising:an actuator having a first surface and a second surface, the first surface being offset a step dimension from the second surface; anda sensor configured to measure a distance between the sensor and both the first surface and the second surface via a signal received by the sensor after having reflected off the first surface or the second surface, wherein the step dimension is greater than a minimum dimension, the minimum dimension being defined in view of a medium through which said actuator moves and a frequency of the signal.2. The system as set forth in claim 1 , wherein the first surface is positionable nearer to the sensor than the minimum dimension when the actuator reaches an end of travel position.3. The system as set forth in claim 2 , wherein said sensor initially directing a signal off said first surface for a period of time claim 2 , and sending a signal off said second surface at least when said first surface approaches the minimum distance from said sensor.4. The system as set forth in claim 3 , wherein said sensor sends a signal off both said first and said second surfaces at least for a period of time as said first surface approaches said minimum distance.5. The system as set forth in claim 4 , wherein said medium is water.6. The system as set forth in claim 5 , wherein said actuator moves a component associated with aircraft.7. The system as set forth in claim 1 , wherein said sensor initially directing a signal off said ...

Passive Solar Identification System for Underwater Lift Bags and Flags

The invention is a system that enables passive sonar identification of underwater items by making use of lift bags and/or flags, having distinctive sequences of bands of sonar-signal-reflecting materials, wherein the lift items are partially inflated so as to present a predictable orientation with respect to the floor of a body of water and its surface. 1. A system comprising:a lift device;said lift device resting on floor of a body of water is partially inflated and pointed essentially toward surface of said body of water;said lift device has one or more bands of sonar-signal-reflective material such that when said lift device is pointed essentially toward said surface said one or more bands comprise bands that are essentially horizontal as viewed from a side; andsaid one or more bands, where more than one, are essentially parallel to one another and essentially vertically displaced from one another.2. A system as in further comprising:said one or more bands of sonar-signal-reflective material, when impinged upon by an incident sonar signal, will reflect said incident sonar signal as a reflected sonar signal; andsaid reflected sonar signal, compared with said incident sonar signal, will differ in signal characteristics because of said one or more bands of sonar-signal-reflective material.3. A system as in further comprising:at least one of said one or more bands has a width, W; andat least one of said one or more bands has a width, 2W.4. A system as in further comprising:said at least one of said one or more bands with said width W represents a binary 1; andsaid at least one of said one or more bands with said width 2W represents a binary 0.5. A system as in further comprising:said at least one of said one or more bands with said width W represents a binary 0; andsaid at least one of said one or more bands with said width 2W represents a binary 1.6. A claim as in further comprising:said one or more bands, where more than one, may be made of different materials such ...

Sensor system, motor vehicle, and method for cleaning an ultrasonic sensor

The invention relates to a sensor system for distance measuring for a motor vehicle, comprising at least one ultrasonic sensor with a sensor housing and at least one membrane with a membrane diameter that is capable of being electrically stimulated into vibrations and a control unit for controlling the at least one membrane as well as for detecting vibrations of the at least one membrane, wherein the control unit is configured to stimulate in a measuring mode the at least one membrane into vibrations with a measuring frequency and a measuring amplitude. The control unit is configured to stimulate the at least one membrane in a cleaning mode into such vibrations that the sensor housing is set into vibrations with a housing amplitude that amounts to at least 1% of the membrane diameter. Further, the invention relates to a motor vehicle and a method for cleaning an ultrasonic sensor.

OBJECT DETECTION DEVICE AND OBJECT DETECTION METHOD

An object detection device includes a controller, a first sensor, and a second sensor. The first sensor transmits a first energy wave, and the second sensor transmits a second energy wave. The first sensor receives a reflected wave of the first energy wave to convert the reflected wave into a first self-signal, and receives a reflected wave of the second energy wave to convert the reflected wave into a first correspondence signal. The second sensor receives the reflected wave of the second energy wave to convert the reflected wave into a second self-signal, and receives the reflected wave of the first energy wave to convert the reflected wave into a second correspondence signal. 1. An object detection device comprising:a controller;a first sensor that receives a first control signal from the controller and transmits a first energy wave to a first region; anda second sensor that receives a second control signal from the controller and transmits a second energy wave to a second region partially overlapping with the first region,wherein the first sensor is configured to receive a reflected wave of the first energy wave, convert the reflected wave into a first self-signal, and transmit the first self-signal to the controller, and to receive a reflected wave of the second energy wave, convert the reflected wave into a first correspondence signal, and transmit the first correspondence signal to the controller,the second sensor is configured to receive the reflected wave of the second energy wave, convert the reflected wave into a second self-signal, and transmit the second self-signal to the controller, and to receive the reflected wave of the first energy wave, convert the reflected wave into a second correspondence signal, and transmit the second correspondence signal to the controller,the controller is configured to detect an object based on the first self-signal, the first correspondence signal, the second self-signal, and the second correspondence signal, andwhen the ...

Method and apparatus for producing an acoustic field

A plurality of control points are defined having a known spatial relationship relative to an array of transducers. An amplitude is assigned to each control point. A matrix is produced containing elements which represent, for each of the control points, the effect that producing a modeled acoustic field having the assigned amplitude with a particular phase at the control point has on the consequential amplitude and phase of the modeled acoustic field at the other control points. Eigenvectors of the matrix are determined, each eigenvector representing a set of phases and relative amplitudes of the modeled acoustic field at the control points. One of the sets is selected and the transducer array is operated to cause one or more of the transducers to output an acoustic wave each having an initial amplitude and phase such that the phases and amplitudes of the resultant acoustic field at the control points correspond to the phases and relative amplitudes of the selected set. 120-. (canceled)21. A method comprising:i) producing an acoustic field from a transducer array having known relative positions and orientations;ii) defining a plurality of control points wherein each of the plurality of control points have a known spatial relationship relative to the transducer array;iii) assigning an amplitude to each of the plurality of control points;iv) computing a matrix containing elements which represent, for each of the plurality of control points, the effect that producing a modeled acoustic field having the assigned amplitude with a particular phase at that control point has on the consequential amplitude and phase of the modeled acoustic field at the other control points;v) calculating a plurality of eigenvectors of the matrix, each of the plurality of eigenvectors representing a set of relative phases and relative amplitudes of the modeled acoustic field at each of the plurality of control points; andvi) selecting one of the set of phases and relative amplitudes of the ...

SYSTEM AND METHOD FOR TESTING OPERABILITY OF A LENS AND SELECTED TRANSDUCER ELEMENTS OF AN ACOUSTIC PROBE

A system and method for testing an acoustic probe is provided. The system includes an electric signal generator connected to transmit an electric generator signal into selected transducer elements of the acoustic probe. The selected of transducer elements of the acoustic probe convert the electrical signal into an acoustic signal that reflects off the lens of the acoustic probe and is then converted by the selected transducer elements of the acoustic probe into a reflected electrical signal. An analysis engine is connected to receive the reflected electrical signal and determine the operability of lens and each selected transducer element for acoustic and electrical conversion. A display provides an illustration indicative of the operative ability of the lens and the selected transducer element of the acoustic probe for acoustic and electrical conversion. 1. System for testing an acoustic probe having a lens in combination with a plurality of transducing elements adapted to convert between acoustic and electrical signals , the system comprising:an electric signal generator connected to transmit an electric generator signal into the plurality of transducer elements of the acoustic probe, wherein the plurality of transducer elements of the acoustic probe converts the electrical signal into an acoustic signal that reflects off the lens of the acoustic probe and is then converted by the transducer elements of the acoustic probe into a reflected electrical signal;an analysis engine connected to receive the reflected electrical signal and determine operability of lens and each selected transducer element for acoustic and electrical conversion;a display configured to provide an illustration indicative of the operative ability of the lens and the selected transducer element of the acoustic probe for acoustic and electrical conversion.2. The system of claim 1 , further comprising:an element switch that selectively transmits the reflective electrical signal received from a ...

METHOD FOR CHECKING A DISTANCE MEASURING DEVICE HAVING AN ULTRASONIC SENSOR

A method for checking a distance measuring device of a transportation vehicle wherein the distance measuring device has ultrasonic sensors. A functional impairment of at least one ultrasonic sensor, a check is performed to determine whether one of the ultrasonic sensors is maladjusted, and an often occurring source of a fault causing a functional impairment of ultrasonic sensors is considered. 1. A method for checking a distance measuring device of a transportation vehicle , the device including at least one ultrasonic sensor , the method comprising detecting a functional impairment of the ultrasonic sensor , wherein it is checked whether a misalignment of the ultrasonic sensor exists.2. The method of claim 1 , wherein an optical and/or acoustic indication is issued to the driver claim 1 , and/or previously determined functions are automatically deactivated in response to a detected misalignment of the at least one ultrasonic sensor.3. The method of claim 1 , wherein the method measures whether the ultrasonic sensor continuously measures a distance in a near range claim 1 , or measures distances in the near range which are highly variable over time claim 1 , and in response to one of these conditions being affirmative claim 1 , a misalignment of the ultrasonic sensor is inferred.4. The method of claim 1 , wherein the method continuously measures whether a structure-borne sound signal from the ultrasonic sensor to be checked is received by at least one ultrasonic sensor which is directly adjacent to the ultrasonic sensor to be checked claim 1 , and in response to this condition being negative claim 1 , a misalignment of the ultrasonic sensor to be checked is inferred.5. The method of claim 1 , wherein the external temperature is measured before determining an existing misalignment of the ultrasonic sensor claim 1 , and in response to an external temperature being around the freezing point claim 1 , at least one sensor-specific parameter of the ultrasonic sensor is ...

METHOD FOR OPERATING A MOTOR VEHICLE AND MOTOR VEHICLE

The invention relates to a method for operating a motor vehicle, in which by at least one ultrasonic sensor, operated in the active operation mode, of an ultrasonic sensor device of the motor vehicle ultrasonic waves are emitted into an environmental region of the motor vehicle, wherein the motor vehicle as hybrid vehicle is equipped with an internal combustion engine (and an electric drive machine and in the active operation mode of the ultrasonic sensor arranged on a rear part of the motor vehicle the motor vehicle at least temporarily is operated by means of the electric drive machine. The invention also relates to a motor vehicle. 1. A method for operating a motor vehicle comprising a hybrid vehicle equipped with an internal combustion engine and an electric drive machine , the method comprising:providing at least one ultrasonic sensor, operated in an active mode, of an ultrasonic sensor device of the motor vehicle;emitting ultrasonic waves into an environmental region of the motor vehicle; andin the active operation mode of the ultrasonic sensor arranged on a rear part of the motor vehicle, operating the motor vehicle at least temporarily by the electric drive machine.2. The method according to claim 1 ,wherein in the case that upon activating the ultrasonic sensor the motor vehicle is being operated by the internal combustion engine, switching the internal combustion engine off and activating the electric drive machine.3. The method according to further comprising:on the basis of sensor data of at least one sensor of the motor vehicle being different from the ultrasonic sensor, detecting an exhaust gas cloud, on which the ultrasonic waves are reflected and which is released by an exhaust system of the motor vehicle into the environmental region and generated by the internal combustion engine, in the active operation mode; anddepending on the detection of the exhaust gas cloud, switching the internal combustion engine off and activating the electric drive ...

VEHICLE-DEDICATED OBJECT DETECTION DEVICE

The vehicle-dedicated object detection device of one aspect according to the present invention includes a wave transceiver and a controller. The controller includes a transmitter, a receiver, a detector, a setter for setting a detection start time, and a determiner. The determiner determines whether the wave transceiver is dirty, based on an amplitude of the received-wave signal in a first time period from a time of starting transmission of an ultrasonic wave to the detection start time. The detector calculates a distance from the wave transceiver to an object when it is determined that the wave transceiver is not dirty and when a current time passes the detection start time. 1. A vehicle-dedicated object detection device , comprising:a wave transceiver for transmitting and receiving an ultrasonic wave; anda controller for controlling the wave transceiver, a transmitter for transmitting a wave-transmitting signal for allowing the wave transceiver to transmit an ultrasonic wave,', 'a receiver for receiving a received-wave signal depending on the ultrasonic wave received by the wave transceiver,', 'a detector for performing detection of an object and calculation of a distance from the wave transceiver to the object, based on the received-wave signal from the receiver,', 'a setter for setting a detection start time at which the detector starts detection of the object, and', 'a determiner for determining whether the wave transceiver is dirty,, 'the controller including'}the determiner being configured to, based on an amplitude of the received-wave signal in a first time period from a time at which the wave transceiver starts to transmit the ultrasonic wave to the detection start time, determine whether the wave transceiver is dirty, andthe detector being configured to, when the determiner determines that the wave transceiver is not dirty and when a current time passes the detection start time preliminarily set by the setter, start detection of the object and calculation ...

OBJECT DETECTION DEVICE

An ECU of an object detection device stops transmission of search waves from a plurality of ultrasonic sensors when a vehicle travels at a predetermined speed or more, and counts the frequency of receiving waves with an intensity of not less than a threshold intensity for each of the plurality of ultrasonic sensors. The ECU acquires a first count that is a count of the frequency in a first sensor that is one of the plurality of ultrasonic sensors, and a second count that is a count of the frequency in a second sensor different from the first sensor. The ECU determines that snow accretion has occurred on the first sensor if the first count is smaller than the second count, and a difference between the first count and a representative value that is set based on the second count is not less than a predetermined value. 1. An object detection device installed in a vehicle , comprising:a plurality of ultrasonic sensors disposed being exposed at an outer surface of the vehicle so that ultrasonic waves, as search waves, are transmitted to the outside of the vehicle, and waves, including reflected waves of the search waves, are received; anda control unit controlling transmission and non-transmission of the search waves by each of the plurality of ultrasonic sensors, and electrically connected to each of the plurality of ultrasonic sensors so as to detect approach of an object to the vehicle, based on the waves received by each of the plurality of ultrasonic sensors, wherein 'start an adhesion determination mode that determines whether snow accretion has occurred on each of the plurality of ultrasonic sensors when the vehicle travels at a speed equal to or higher than a predetermined speed; and', 'the control unit is configured to stop transmission of the search waves by each of the plurality of ultrasonic sensors;', 'count frequency of receiving the waves with an intensity of not less than a threshold intensity, for each of the plurality of ultrasonic sensors while ...

TEST DEVICE FOR TESTING A DISTANCE SENSOR OPERATING WITH ULTRASONIC WAVES

A test device for testing a distance sensor operating with ultrasonic waves, wherein the distance sensor to be tested comprises at least a sensor radiating element for emitting a transmission signal and a sensor receiving element for receiving a reflected signal. For effective and accurate testing and stimulation of the distance sensor, the test device has a test receiving element for receiving ultrasonic waves emitted from the distance sensor to be tested, and at least one test radiating element for radiating test ultrasonic waves, and a signal processing unit, wherein ultrasonic waves received by the test receiving element are transmitted as a received signal to the signal processing unit and the signal processing unit, as a function of the received signal and simulation distance information relating to a distance to be simulated, and determines an excitation signal for the test radiating element. 1. A test device for testing a distance sensor operating with ultrasonic waves , the test device comprising:at least one sensor radiating element for radiating a transmission signal;a sensor receiving element for receiving a reflected signal;a test receiving element for receiving the ultrasonic waves emitted by the distance sensor to be tested;at least one test radiating element for radiating test ultrasonic waves; anda signal processing unit,wherein ultrasonic waves received by the test receiving element are transmitted as a received signal to the signal processing unit, andwherein the signal processing unit, as a function of the received signal and a simulation distance information relating to a distance to be simulated, determines an excitation signal for the test radiating element, which is delayed according to the simulation distance information and transmits it to the test radiating element, andwherein the test radiating element generates corresponding test ultrasonic waves and radiates them onto the distance sensor to be tested.2. The test device according to ...

METHOD AND DEVICE FOR PROCESSING AN ULTRASONIC SIGNAL RECORDED BY AN ULTRASONIC SENSOR

A method for processing a receive signal recorded by an ultrasonic sensor. Echoes are filtered out from a signal curve of the receive signal using at least one echo criterion in order to obtain a filtered receive signal. At least one noise level of the filtered receive signal is determined in at least one subregion of the signal curve. 110-. (canceled)11. A method for processing a receive signal recorded by an ultrasonic sensor , comprising the following steps:filtering out echoes from a signal curve of the receive signal using at least one echo criterion to obtain a filtered receive signal; anddetermining at least one noise level of the filtered receive signal in at least one subregion of the signal curve.12. The method as recited in claim 11 , wherein the noise level is determined temporally after an echo represented in the signal curve.13. The method as recited in claim 12 , wherein the noise level is determined between the echo and an end of a measurement window of the signal curve.14. The method as recited in claim 12 , wherein claim 12 , in an initial region of the signal curve claim 12 , a ground echo is filtered out from the signal curve claim 12 , and the noise level is determined from the signal curve between the ground echo and the echo.15. The method as recited claim 11 , wherein the noise level is determined as median value of a plurality of noise level values claim 11 , a largest noise level value and/or a smallest noise level value of the subregion being discarded.16. The method as recited in claim 15 , wherein a noise level value is determined as median value of a group of a plurality of successive sensor values of the receive signal claim 15 , a largest sensor value of the group and/or a smallest sensor value of the group being discarded.17. The method as recited in claim 11 , wherein the receive signal is filtered using a decay criterion to filter a decay of an excitation of the ultrasonic sensor out of the receive signal after emission of an ...

Method for detecting a blocked state of an ultrasonic sensor, ultrasonic sensor device, and motor vehicle

The invention relates to a method for detecting a blocked state of an ultrasonic sensor ( 3 ) of a motor vehicle ( 1 ), wherein an actual value of at least one oscillation parameter (fR) of the ultrasonic sensor ( 3 ) is sensed and is compared with a reference value by means of an evaluation unit ( 4 ) in order to detect a blocked state, wherein a current temperature (T) to which the ultrasonic sensor ( 3 ) is exposed is detected by means of a temperature detecting device ( 8 ), and the reference value is determined as a function of the current temperature (T) by means of the evaluation unit ( 4 ).

OBJECT DETECTION DEVICE

An object detection device is applied to an object detection system which includes an object detection sensor installed in a vehicle so as to be oriented outward to detect an object around the vehicle. The object detection device includes: an error-handling control section that notifies a user of a detection error, if any, occurring in the object detection sensor, and brings the object detection system into an error-handling state; an action determination section that determines whether an error correction action has been performed by a user to correct the detection error, under conditions where the user has been notified of the detection error occurring in the object detection sensor; and a cancellation control section that relaxes predetermined cancellation conditions for cancelling the error-handling state when the error correction action is determined to have been performed, compared to when not performed. 1. An object detection device applied to an object detection system which includes an object detection sensor installed in a vehicle so as to be oriented outward to detect an object around the vehicle , the device comprising:an error-handling control section that notifies a user of a detection error, if any, occurring in the object detection sensor, and brings the object detection system into an error-handling state;an action determination section that determines whether an error correction action has been performed by a user to correct the detection error, under conditions where the user has been notified of the detection error occurring in the object detection sensor; anda cancellation control section that relaxes predetermined cancellation conditions for cancelling the error-handling state when the error correction action is determined to have been performed, compared to when not performed.2. The object detection device according to claim 1 , wherein:the cancellation conditions include acquisition of normal outputs of the object detection sensor a ...

SENSOR WITH MONOLITHIC ULTRASONIC ARRAY

A sensor and a method for detecting a position of the sensor relative to a guide surface, comprising a housing and an electronic analysis device which outputs measurement values for the position of the guide surface on the basis of the measurement signals. The sensor contains an ultrasonic transducer array, each of the two outer ends of which is additionally equipped with a respective reference ultrasonic transducer and a respective reflector surface flush with the reference piezo disc at a distance from the base side, said ultrasonic transducers and reflector surfaces being inclined by 45° relative to the base side and pointing towards one another, thus forming a reference measurement path with a known length between the two reference ultrasonic transducers. In the method for detecting the relative position, the measurement values are corrected with respect to environmental influences by measurements in a reference path. 1. A sensor for detecting a position relative to a guide surface , the sensor comprising:a housing, on a bottom side of which is arrangeda flat elongated ultrasonic transducer array arranged on a bottom side of the housing, the ultrasonic transducer comprising multiple measurement ultrasonic transducers that are oriented with their sound-radiating transducer surfaces parallel to the ultrasonic transducer array;an electronic analysis device that provides measured values for the position of the guide surface as a function of measurement signals of the measurement ultrasonic transducers;a reference ultrasonic transducer being attached to each of two outer ends of the ultrasonic transducer array and oriented with their sound-radiating transducer surfaces parallel to the ultrasonic transducer array; andat least two reflector surfaces attached at a distance from the bottom side and in alignment with the reference ultrasonic transducers, the reflector surfaces being inclined at an angle of 45° to the applicable reference ultrasonic transducer and face one ...

DETECTION OF NOISE-INDUCED ULTRASONIC SENSOR BLINDNESS

Piezoelectric sensor controllers may facilitate detection and identification of various potential fault states including noise-induced sensor blindness. In one illustrative embodiment, a sensor controller includes: a transmitter to drive a piezoelectric element during actuation intervals to generate acoustic bursts; a receiver to sense a response of the piezoelectric element to echoes of each acoustic burst, the receiver including a front-end amplifier; a processing circuit coupled to the transmitter and to the receiver, the processing circuit operable to apply echo-detection processing to said response; and a blindness detector to detect saturation of the front-end amplifier during or prior to the measurement intervals. 1. A controller for a piezoelectric transducer , the controller comprising:a transmitter to drive a piezoelectric element during actuation intervals to generate acoustic bursts;a receiver to sense a response of the piezoelectric element to echoes of each acoustic burst, the receiver including a front-end amplifier;a processing circuit coupled to the transmitter and to the receiver, the processing circuit operable to apply echo-detection processing to said response; anda blindness detector to detect saturation of the front-end amplifier outside of the actuation intervals.2. The controller of claim 1 , wherein the blindness detector detects saturation immediately prior to each actuation interval.3. The controller of claim 1 , wherein the blindness detector includes:an envelope detector that measures a wideband envelope of the response outside of the actuation interval; anda comparator that compares the wideband envelope to a threshold representing saturation of the front-end amplifier.4. The controller of claim 3 , further comprising:an analog-to-digital converter subsequent to the front-end amplifier, the analog-to-digital converter providing a digital response signal;a bandpass filter centered on a carrier frequency of the acoustic bursts to produce ...

Methods for detecting sensor degradation in distance sensors

A method for detecting a sensor degradation in distance sensors, having the following: a) sending out at least one transmit pulse; b) acquisition of a sensor signal at least in a decay interval; and c) determination of a degree of degradation based on a frequency response of the acquired sensor signal. Also described is a computer program product, a distance sensor unit, and a driver assistance system for carrying out such methods.

Method and Apparatus for Producing an Acoustic Field

A plurality of control points () are defined which each have a known spatial relationship relative to an array of transducers. An amplitude is assigned to each control point (). A matrix () is produced containing elements which represent, for each of the control points, the effect that producing a modeled acoustic field having the assigned amplitude with a particular phase at the control point has on the consequential amplitude and phase of the modeled acoustic field, at the other control points (). Eigenvectors of the matrix () are determined, each eigenvector representing a set of phases and relative amplitudes of the modeled acoustic field at the control points. One of the sets () is selected and the transducer array is operated to cause one or more of the transducers to output an acoustic wave each having an initial amplitude and phase such that the phases and amplitudes of the resultant acoustic field at the control points correspond to the phases and relative amplitudes of the selected set (). 120- . (canceled)21. A method comprising:a) determining the position of an object within the volume of the acoustic field;b) intersecting the object with a modeled shape;c) defining at least one control point based on where the object intersects the modeled shape;d) assigning a known spatial relationship relative to a transducer array to each of the at least one control point;e) producing the acoustic field corresponding to the at least one control point defined with respect to the transducer array having known relative positions and orientations.22. The method of claim 21 , wherein the determining the position of an object is achieved using a tracking system.23. The method of claim 22 , wherein the tracking system is a hand tracking system.24. The method of claim 21 , wherein an update to an object position and subsequent definition of the at least one control point is determined in response to changes in the object.25. The method of claim 24 , where the update is ...

Method and Apparatus for Producing an Acoustic Field

The present invention concerns a method and apparatus for the modulation of an acoustic field for providing tactile sensations. A method of creating haptic feedback using ultrasound is provided. The method comprises the steps of generating a plurality of ultrasound waves with a common focal point using a phased array of ultrasound transducers, the common focal point being a haptic feedback point, and modulating the generation of the ultrasound waves using a waveform selected to produce little or no audible sound at the haptic feedback point. 120-. (canceled)21. A method comprising:defining a three-dimensional virtual shape in a volume occupied by an acoustic field by:i) producing the acoustic field from a transducer array having known relative positions and orientations;ii) defining a plurality of control points wherein each of the plurality of control points have a known spatial relationship relative to the transducer array;iii) assigning an amplitude to each of the plurality of control points;iv) computing a matrix containing elements which represent, for each of the plurality of control points, the effect that producing a modeled acoustic field having the assigned amplitude with a particular phase at that control point has on the consequential amplitude and phase of the modeled acoustic field at the other control points;v) calculating a plurality of eigenvectors of the matrix, each of the plurality of eigenvectors representing a set of relative phases and relative amplitudes of the modeled acoustic field at each of the plurality of control points; andvi) selecting one of the set of phases and relative amplitudes of the modeled acoustic field and operating the transducer array to cause at least one transducer to output an acoustic wave having an initial amplitude and phase such that the phases and amplitudes of the resultant acoustic field at the control points correspond to the phases and relative amplitudes of the selected set of phases and relative amplitudes ...

Motor Vehicle Having Occlusion Detection for Ultrasonic Sensors

In a method for checking a first ultrasonic sensor of a motor vehicle for an occlusion, a measuring signal of the first ultrasonic sensor is acquired by an evaluation unit, and from the measuring signal, a decay time of a natural oscillation of the diaphragm of the first ultrasonic sensor, brought about by an excitation pulse, is ascertained. From the measuring signal of either the first ultrasonic sensor or a second ultrasonic sensor, an echo produced by an object located in a sensing range of the first ultrasonic sensor is ascertained, and a distance value of the object is determined on the basis of the echo. An occlusion is signaled if the decay time is less than a predetermined threshold value which would be exceeded if ice and/or dirt were to adhere directly to the diaphragm, and if the distance value is less than a predetermined maximum value. 110-. (canceled)11. A method for checking a first ultrasonic sensor of a motor vehicle for an occlusion , the method comprising:applying, by a transmitter unit, an excitation pulse to a diaphragm of the first ultrasonic sensor;detecting, by an evaluation unit, a measuring signal of the first ultrasonic sensor, and ascertaining from the measuring signal a decay time of a natural oscillation of the diaphragm, brought about by the excitation pulse;ascertaining, from one of the measuring signal of the first ultrasonic sensor or a measuring signal of a second ultrasonic sensor, an echo of the excitation pulse, produced by an object located in a sensing range of the first ultrasonic sensor, and determining at least a first distance value of the object on the basis of the echo; andsignaling, by the evaluation unit, an existence of the occlusion at least if (i) the decay time is less than a predetermined threshold value, and (ii) the first distance value is less than a predetermined maximum value, wherein the predetermined threshold value represents a value which is exceeded in the event at least one of ice and dirt is adhered ...

ULTRASONIC SENSOR

A shield member electromagnetically shielding at least part of an electric circuit has a first end and a second end. The first end is configured to be constantly connected to a ground wire to electromagnetically shield at least part of the electric circuit; and the second end is configured to be selectively connectable to a power source, the shield member being configured to generate heat when energized while the second end is connected to the power source. Accordingly, the shield member electromagnetically shielding at least the part of the electric circuit can serve as a heater for preventing freezing and snow attachment.

OBJECT DETECTION DEVICE

An object detection device mounted on a vehicle includes a transmitter, a receiver, a measurement unit, and a determination unit. The transmitter intermittently transmits a signal wave to space around the vehicle. The receiver receives a reflected wave from an object. The measurement unit measures a distance to the object based on the reflected wave received by the receiver. The determination unit determines that the object is abnormally close to the vehicle if the distance measured by the measurement unit is within a determination distance range, counts the number of determinations that the object is abnormally close to the vehicle, and determines that at least one of the transmitter or the receiver malfunctions if the number of determinations reaches a threshold. 1. An object detection device mounted on a vehicle , the object detection device comprising:a transmitter that intermittently transmits a signal wave to space around the vehicle;a receiver that receives a reflected wave generated by reflection of the signal wave on an object;a measurement unit that measures a distance to the object based on the reflected wave received by the receiver; anda determination unit that determines that the object is abnormally close to the vehicle if the distance measured by the measurement unit is within a determination distance range, counts the number of determinations that the object is abnormally close to the vehicle, and determines that at least one of the transmitter or the receiver is malfunctioning if the number of determinations reaches a threshold.2. The object detection device of claim 1 , further comprising a vehicle speed acquisition unit that acquires a vehicle speed of the vehicle claim 1 , whereinthe determination unit increments the number of determinations only if the vehicle speed acquired by the vehicle speed acquisition unit is out of a predetermined speed range and the determination unit determines that the object is abnormally close to the vehicle.3. The ...

ULTRASONIC SENSOR

An ultrasonic sensor, that transmits probe waves which are ultrasonic waves and acquires detection waves including reflected waves which have been reflected from surrounding objects, includes a transmitter/receiver that transmits the probe waves and acquires the detection waves, a detection wave processing section that executes processing for passing a predetermined frequency band which includes the frequency of the probe waves, an amplitude measurement section which measures the amplitude of the detection waves, and a judgement section which judges whether there is adherence of foreign matter on the transmitter/receiver, based on a relationship between a time axis and values of the amplitude of the detection waves during a reverberation interval following the termination of transmitting the probe waves. 1. An ultrasonic sensor that transmits probe waves which are ultrasonic waves , and acquires detection waves that include reflected waves which have been reflected from surrounding objects , comprising:a transmitter/receiver that transmits the probe waves and acquires the detection waves;a detection wave processing section that executes processing for passing a predetermined frequency band which includes the frequency of the probe waves;an amplitude measurement section that measures the amplitude of the detection waves; anda judgement section that judges whether there is adherence of foreign matter on the transmitter/receiver, based on a relationship between a time axis and values of the amplitude of the detection waves during a reverberation interval following the termination of transmitting the probe waves.2. The ultrasonic sensor according to claim 1 , whereinthe judgement section acquires, as the relationship between the time axis and the amplitude, an interval extending from the point at which the amplitude falls below a first threshold value until the amplitude falls below a second threshold value, and executes the judgement based on the acquired interval.3. ...

Method for detecting a screening of a sensor device of a motor vehicle by an object, computing device, driver-assistance system and motor vehicle

The invention relates to a method for detecting a screening of a sensor device ( 4 ) of a motor vehicle ( 1 ) by an object ( 8 ), in which at least one echo signal, captured by the sensor device ( 4 ), that characterizes a spacing between the sensor device ( 4 ) and the object ( 8 ) is received (S 1 ) by means of a computing device ( 3 ), a capture region (E) for the sensor device ( 4 ) is determined, and on the basis of the at least one received echo signal it is checked whether the capture region (E) of the sensor device ( 4 ) is being screened by the object ( 8 ), at least in some regions, wherein the at least one echo signal is assigned by means of the computing device ( 3 ) to a discrete spacing value (B 1, B 2, B 3 ) from a plurality of discrete spacing values (B 1, B 2, B 3 ), for each of the discrete spacing values (B 1, B 2, B 3 ) a power value (P) is determined (S 2 ) on the basis of the echo signal, and on the basis of the power values (P) a decision is made by means of a classifier as to whether at least a predetermined proportion of the capture region (E) of the sensor device ( 4 ) is being screened (S 6 ) by the object ( 8 ).

Object detection apparatus

An object detection apparatus of the present invention has a wave transmitter that transmits energy waves (ultrasound waves) to a detection target region. The object detection apparatus also has a wave receiver that receives the energy waves reflected from an object existing in the detection target region and converts the received energy waves to wave reception signals made of electric signals. The object detection apparatus further has a controller that controls the wave transmitter to continuously transmit the energy waves during a predetermined wave transmission period, and a measurement part that measures a distance from the object detection apparatus to the object based on the wave reception signals output from the wave receiver. The controller is configured so as to change the wave transmission period corresponding to the distance measured by the measurement part.

Sensor cleaning apparatus

An apparatus configured to induce airflow over a sensor lens is provide. The apparatus includes a sensor lens; and a plasma actuator. The plasma actuator may include a dielectric element, a first electrode disposed under the dielectric element, a second electrode disposed on the dielectric element such that the second electrode is exposed, and a plasma layer disposed in between the first electrode and the second electrode. The plasma actuator may be disposed at a periphery of the sensor lens.

ULTRASONIC APPARATUS

An ultrasonic apparatus includes an ultrasonic transducer, a driving circuit, a receiving circuit, a frequency detector, a frequency storage, a temperature detector, and an anomaly determiner. The frequency detector detects a resonant frequency of the ultrasonic transducer. The frequency storage stores a resonant frequency of the ultrasonic transducer at a predetermined temperature. The anomaly determiner determines an anomaly of the ultrasonic transducer based on a temperature detected by the temperature detector, a resonant frequency stored in the frequency storage, and a resonant frequency detected by the frequency detector. 1. An ultrasonic apparatus comprising:an ultrasonic transducer;a driving circuit to cause the ultrasonic transducer to transmit sonic waves;a receiving circuit to receive sonic waves received by the ultrasonic transducer;a frequency detector to detect a resonant frequency of the ultrasonic transducer;a storage to store a resonant frequency of the ultrasonic transducer at a predetermined temperature;a temperature detector; anda determiner to determine an anomaly of the ultrasonic transducer based on a temperature detected by the temperature detector, the resonant frequency stored in the storage, and the resonant frequency detected by the frequency detector.2. The ultrasonic apparatus according to claim 1 , wherein a capacitance detector to detect a capacitance of the ultrasonic transducer;', 'a capacitance storage to store a capacitance of the ultrasonic transducer at the predetermined temperature; and', 'a temperature estimator to estimate a temperature based on the capacitance detected by the capacitance detector and the capacitance stored by the capacitance storage., 'the temperature detector includes3. The ultrasonic apparatus according to claim 1 , wherein the temperature detector includes a thermistor.4. The ultrasonic apparatus according to claim 1 , whereinthe ultrasonic transducer includes a piezoelectric element,a case, a sound ...

METHOD FOR THE IMPROVED DETECTION OF A GROUND ECHO SIGNAL IN AN ULTRASONIC SENSOR OF A VEHICLE

A method for detecting a ground echo signal of an ultrasonic sensor of a vehicle. The ultrasonic sensor emits a signal at a first frequency or having a first frequency profile, the signal is reflected by a roadway surface and the reflected signal is received by the ultrasonic sensor and/or by an additional ultrasonic sensor. The received echo signal is filtered with the aid of a matched filter, the matched filter being adapted to the emitted signal and having a characterizing frequency. In this way a ground echo signal is determined from the filtered signal. The instantaneous vehicle speed is determined and an expected Doppler shift of the reflected signal is determined as a function of the instantaneous vehicle speed. The first frequency or the first frequency profile and/or the characterizing frequency of the matched filter is/are adapted as a function of the Doppler shift to be expected. 110-. (canceled)11. A method for detecting a ground echo signal of an ultrasonic sensor of a vehicle , the method comprising the following steps:emitting, by the ultrasonic sensor, a signal at a first frequency or having a first frequency profile, the signal being reflected by a roadway surface;receiving, by the ultrasonic sensor or by an additional ultrasonic sensor, the reflected signal;filtering, using a matched filter, the received reflected signal, the matched filter having a characterizing frequency;determining a ground echo signal from the filtered signal;determining an instantaneous vehicle speed;determining an expected Doppler shift of the reflected signal as a function of the determined instantaneous vehicle speed; andadapting: (i) the first frequency or the first frequency profile, and/or (ii) the characterizing frequency of the matched filter, as a function of the expected Doppler shift.12. The method as recited in claim 11 , wherein a clutter value is determined from the ground echo signal.13. The method as recited in claim 11 , wherein a center frequency of the ...

METHOD AND DEVICE FOR MONITORING THE FUNCTION OF ULTRASONIC SENSORS

A method for monitoring the function of ultrasonic sensors of a vehicle, an ultrasonic sensor of the vehicle emitting ultrasonic signals and receiving back reflected ultrasonic echoes. An instantaneous amplitude of a ground echo received by an ultrasonic sensor and an instantaneous vehicle position are determined. A reference threshold value or information regarding an expected ground echo amplitude is retrieved from a digital map as a function of the instantaneous vehicle position, the digital map being provided by a central unit. The instantaneous amplitude of the received ground echo is compared with a threshold value, a malfunction of the ultrasonic sensors being deduced if the threshold value is undershot and the threshold value being predefined by the reference threshold value or the threshold value being determined based on the information regarding an expected ground echo amplitude. 111-. (canceled)12. A method for monitoring the function of an ultrasonic sensor of a vehicle , the ultrasonic sensor of the vehicle emitting ultrasonic signals and receiving reflected ultrasonic echoes back , the method comprising the following steps:a) determining an instantaneous amplitude of a ground echo received by the ultrasonic sensor and determining an instantaneous vehicle position;b) retrieving as a function of the instantaneous vehicle position, from a digital map, a reference threshold value or information regarding an expected ground echo amplitude, the digital map being provided by a central unit; andc) comparing the instantaneous amplitude of the received ground echo with a threshold value, a malfunction of the ultrasonic sensor being determined when the threshold value is undershot;wherein the threshold value is predefined by the reference threshold value or the threshold value is determined based on the information regarding the expected ground echo amplitude.13. The method as recited in claim 12 , wherein the vehicle is wirelessly connected to the central unit ...

Method and apparatus for deicing of sensor systems in a vehicle

Methods and systems are provided for controlling a radar system in a vehicle. In particular, the method and system employs a heating element within or affixed to a portion or proximate to a vehicular radar sensor and where the method and system is operative to determine that a blockage of the vehicular radar sensor has occurred and that an icing condition may exist, and to activate the heating element in response.

Method for freezing and contamination recognition of environmental influences, involves stimulating diaphragm of ultrasonic sensor sending ultrasonic waves with given stimulated frequency

The method involves stimulating diaphragm of an ultrasonic sensor sending ultrasonic waves with a given stimulated frequency. The decaying frequency observes stimulation and determines a freezing or contamination of diaphragm by comparison of stimulation frequency with a decaying frequency.

Localization system and method of robot

제1 신호를 발신하는 제1 신호 발신부를 포함하는 제1 이동 로봇 및 레이저 센서를 이용하여 적어도 하나 이상의 주변 물체들 각각의 거리 및 방향을 측정하는 레이저 센싱부 및 상기 제1 이동 로봇의 상기 제1 발신부로부터 발신된 제1 신호에 기초하여 상기 제1 이동 로봇의 방향을 측정하는 제1 신호 수신부를 포함하며, 상기 제1 이동 로봇의 방향 및 상기 주변 물체들의 거리 및 방향에 기초하여 상기 제1 이동 로봇의 위치를 측정하는 제2 이동 로봇을 포함하는 로봇 위치 측정 시스템. A laser sensor for measuring a distance and a direction of each of at least one or more peripheral objects using a first mobile robot and a laser sensor including a first signal transmitter for transmitting a first signal, And a first signal receiving unit for measuring a direction of the first mobile robot on the basis of a first signal transmitted from the transmitting unit, wherein the first signal receiving unit measures the direction of the first mobile robot based on the direction of the first mobile robot, And a second mobile robot for measuring a position of the mobile robot.

Object detection apparatus

The post-correction method of an acquired image including surface reflection signals by roll in an imaging sonar attached underwater vehicle

본 발명은 수중운동체의 몸체에 부착된 영상 소나를 통하여 획득한 영상정보에서 상기 수중운동체의 횡동요에 의해 포함된 해수면 반사신호를 보정하는 수중운동체의 영상소나에서 횡동요시 해수면 반사신호를 포함한 영상의 후보정 방법에 관한 것이다. 본 발명에 따른 수중운동체의 영상소나에서 횡동요시 해수면 반사신호를 포함한 영상의 후보정 방법은, 수중운동체(10)의 몸체에 부착된 영상소나(11)로부터 해수면(21)과 해저면(22)으로 음향신호를 발신하고, 상기 해수면(21)과 상기 해저면(22)으로부터 수신된 반사신호를 영상신호로 변환하는 영상의 후보정 방법에 있어서, 상기 수중운동체(10)에 부착된 센서로 측정된 수중운동체(10)의 운동 정보를 이용하여 획득 영상에서 해수면 반사파가 존재할 것으로 예상되는 픽셀을 추정하는 픽셀 추정 단계(S110)와, 추정된 픽셀에 정해진 범위이내에 인접한 다른 픽셀들로부터 실제 해수면 반사파가 존재하는 픽셀을 결정하는 픽셀 결정 단계(S120)와, 결정된 픽셀 값을 정해진 범위 내의 픽셀값을 이용하여 새로운 픽셀 값으로 보정하는 영상 보정 단계(S130)를 포함한다. The present invention relates to a method and apparatus for detecting a sea level of a submerged vehicle in a video image of an underwater vehicle that corrects a sea level reflection signal included in the image information acquired through an image sensor attached to a body of an underwater vehicle, To a method for post-processing. A method for post-processing an image including a sea level reflection signal during transverse rocking in an image of an underwater vehicle according to the present invention is a method for reconstructing an image including a sea surface 21 and a sea floor surface 22 from an image sonar 11 attached to a body of an underwater vehicle 10, (20) and a reflection signal received from the sea floor (22) into an image signal, the method comprising the steps of: (S110) of estimating a pixel in which the sea surface reflection wave is expected to be present in the acquired image using the motion information of the underwater vehicle (10); and a step (S120) of correcting the determined pixel value to a new pixel value using a pixel value within a predetermined range, and an image correction step (S130) of correcting the determined pixel value to a new pixel value do.

Vehicle backing aid

A method and apparatus is provided for alerting the operator of a vehicle as to the distance from the rear of the vehicle to a structure such as a loading dock to which the vehicle is being backed through the utilization of sonar ranging and means for converting a detected range into an audible call out of the distance from the back of the vehicle to the structure to which the vehicle is being backed. In one embodiment the talking unit is activated upon the placing of the vehicle in reverse gear. When used on trucks, the transducer is removably mountable to the rear of the truck, with a transmission line lead to the cab of the truck. In the preferred embodiment, a 50 kH 2 transducer is utilized to project a fan beam of radiation from the back of the vehicle so that not only is the closest projecting object in the path of the beam detected and the distance thereto annunciated, any pedestrians or persons having a height commensurate with that of the mounted transducer will cause the range to that person to be annunciated, thereby providing an alarm indication to the driver. In a further embodiment, the transducer is protected from the elements and is either open to the elements only during backing, or is cleaned such that road grime and other hydrocarbons do not contaminate the transducer surface except at such limited times as when the vehicle is in reverse. The audiblization of the distance between the back of the truck and the structure to which it is backed may be provided at a predetermined rate, or may be predicated on a predetermined range change or, may be called out only at preset distances.

Apparatus and method for monitoring tanks in an inventory management system

A method includes lowering a sensor unit in a tank, where the tank is capable of receiving a material. The method also includes determining a first distance between the material and the sensor unit and determining a second distance between the sensor unit and a main unit that lowers the sensor unit. In addition, the method includes determining a level of the material in the tank using the first and second distances. The method could further include calibrating the sensor unit to compensate for variations in a medium within the tank, where the sensor unit transmits wireless signals through the medium to determine the first distance. Determining the first distance could include using an ultrasonic measurement technique, and determining the second distance could include using a non-contact servo measurement technique.

Device for calibrating multi-beam sonar sounding and resolution ratio

本发明提供的是一种校准多波束声呐测深和分辨率的装置。包括基架、标准反射体、探照灯、摄录设备、深度移动机构、水平移动机构，基架底部由中空圆形管制成，基架侧面由中空方形管制成，管表面敷设声学覆盖层和尖劈，基架顶部由中空方形管制成，基架顶部的两侧有龙骨，龙骨外侧有支撑调节机构，标准反射体由立方体钢箱、钢板和底质目标箱组成，探照灯安装在基架侧面，摄录设备可随水平移动机构进行运动，深度移动机构安装在水平移动机构内，水平移动机构可带动多波束声呐进行上下和前后扫描，整个装置放置在消声水池中，在良好的消声环境中，利用光学成像的结果去标定多波束声呐的测深和分辨率能力，为多波束声呐的实际使用提供一张“合格证”。

Method for functionally testing an ultrasonic sensor

本发明涉及一种用于机动车上超声波传感器的功能检验的方法，其中，在检验工作中，发射出这样大的超声波信号，以便在通常条件下能够接收由地面反射的信号，在接收到被反射的信号时确定出该超声波传感器功能正常。

Object detection device

本发明具备送波部，其对探测对象区域发送能量波(超声波)。另外，具备受波部，其接收由存在于探测对象区域的物体进行了反射的能量波，将接收得到的能量波变换成由电信号构成的受波信号。进而具备：控制部，其进行控制以使得送波部在给定的送波期间连续地发送能量波；和测量部，其基于从受波部输出的受波信号来测量到物体的距离。控制部构成为对应于测量部测量出的距离来变更送波期间。

Method for operating an ultrasonic sensor device of a motor vehicle, ultrasonic sensor device, driver assistance system, and motor vehicle

The invention relates to a method for operating an ultrasonic sensor device (3) of a motor vehicle (1), wherein a transmission signal is emitted and at least one echo of the transmission signal is received in at least one measurement cycle by means of at least one ultrasonic sensor (4, 5, 6) of a plurality of ultrasonic sensors (4, 5, 6) of the ultrasonic sensor device (3) in order to detect an object in a environment region of the motor vehicle (1) and a region (13) for arranging a towing device (12) of the motor vehicle (1) is masked out by means of a control device in the detection of the object, wherein the ultrasonic sensor device (3) is operated for a predetermined duration in a sensing mode, in which a presence of the towing device (12) on the motor vehicle (1) is detected on the basis of the at least one received echo and the region (13) is adjusted in accordance with the presence of the towing device (12).

Method for adjusting the sensitivity of ultrasonic sensors

본 발명은, 먼저 노면과의 교차점(7)을 갖는 초음파 빔(5)이 초음파 센서(1)로부터 송신되도록 선택되는 센서 감도가 조정되는, 차량에 대한 물체의 거리 검출을 위한 초음파 센서(1)의 감도 조정 방법에 관한 것이다. 다음 단계에서 초음파 센서(1)에 의한 측정이 실시되고, 이때 차량 주변에 있는 물체로부터 차량까지의 거리가 노면(9)과 초음파 빔(5)의 교차점(7)까지의 초음파 센서(1)의 거리(11)보다 더 멀기 때문에, 노면(9)과 초음파 빔(5)의 교차점(7)에 대한 초음파 센서(1)의 거리(11)가 물체에 대한 최단 거리로서 검출된다. 다음으로, 앞서 검출된, 노면(9)과 초음파 빔(5)의 교차점(7)과 초음파 센서(1) 사이의 거리(11)에 따라서 초음파 센서(1)의 감도가 조정되므로, 감도의 이런 조정 후에는 초음파 빔이 노면(9)에 가장 근접한 지점(31)에서 노면(9)까지의 설정 거리(33)에 미달하지 않는다. The present invention is characterized in that the ultrasonic sensor 1 for detecting the distance of an object to the vehicle in which the sensor sensitivity to be selected so that the ultrasonic beam 5 having the intersection 7 with the road surface is transmitted from the ultrasonic sensor 1 is adjusted, To a method of adjusting the sensitivity of the sensor. The distance from the object in the vicinity of the vehicle to the vehicle is measured at the intersection point 7 of the road surface 9 and the ultrasonic beam 5 in the ultrasonic sensor 1 The distance 11 of the ultrasonic sensor 1 to the intersection point 7 of the road surface 9 and the ultrasonic beam 5 is detected as the shortest distance to the object. Next, since the sensitivity of the ultrasonic sensor 1 is adjusted according to the previously detected distance 7 between the road surface 9 and the ultrasonic beam 5 and the distance 11 between the ultrasonic sensor 1, After the adjustment, the ultrasonic beam does not reach the set distance 33 from the point 31 closest to the road surface 9 to the road surface 9.

Ultrasonic unit

超声波装置(1)具备超声波换能器(100)、驱动电路(104)、接收电路(106)、频率检测部(114)、频率存储部(118)、温度检测部(112)、以及异常判定部(119)。频率检测部(114)检测超声波换能器(100)的谐振频率。频率存储部(118)对预先确定的温度下的超声波换能器的谐振频率进行存储。异常判定部(119)基于温度检测部(112)检测的温度、存储在频率存储部(118)的谐振频率(fini)、以及频率检测部(114)检测的谐振频率(fm)来判定超声波换能器(100)的异常。由此，能够提供能够精度良好地检测超声波换能器的异常的超声波装置。

Sensor, method of determining external factors and method of determining relative arrangement of sensor

FIELD: measuring equipment.SUBSTANCE: invention relates to a sensor and a method of determining the position of a sensor relative to guide surface (5) with housing (1) and electronic analyzer (7), which outputs measurement results of the position of guide surface (5) based on measurement signals. Sensor comprises a matrix with ultrasonic transducers, wherein each of two outer ends of which is additionally equipped with corresponding control ultrasonic transducer and corresponding reflecting surface (12), made flush with corresponding piezoceramic disc (13), remote from bottom (9), wherein said ultrasonic transducers and reflecting surfaces are inclined to bottom (9) at angle of 45° and facing each other to thereby form a reference measurement portion (R) of known length between two control ultrasonic transducers. In the method of determining relative location, the measured values are corrected by the value of external effects by measurements on the control section.EFFECT: disclosed are a sensor, a method for determining external factors and a method of determining the relative arrangement of a sensor.18 cl, 6 dwg РОССИЙСКАЯ ФЕДЕРАЦИЯ (19) RU (11) (13) 2 692 295 C1 (51) МПК E02F 9/20 (2006.01) E01C 19/00 (2006.01) ФЕДЕРАЛЬНАЯ СЛУЖБА ПО ИНТЕЛЛЕКТУАЛЬНОЙ СОБСТВЕННОСТИ (12) ОПИСАНИЕ ИЗОБРЕТЕНИЯ К ПАТЕНТУ (52) СПК E02F 9/2025 (2019.02); E02F 9/2037 (2019.02); E02F 9/2045 (2019.02); E01C 19/00 (2019.02) (21)(22) Заявка: 2018117032, 09.10.2015 (24) Дата начала отсчета срока действия патента: (73) Патентообладатель(и): МИКРОСОНИК ГМБХ (DE) Дата регистрации: 24.06.2019 R U 09.10.2015 (72) Автор(ы): ШУЛЬТЕ Йоханнес (DE) (56) Список документов, цитированных в отчете о поиске: CN 1776124 A, 24.05.2006. RU 2133790 C1, 27.07.1999. DE 4206990 A1, 24.09.1992. DE 4204481 A1, 29.10.1992. DE 8810670 U1, 26.01.1989. DE 3816198 C1, 07.09.1989. (45) Опубликовано: 24.06.2019 Бюл. № 18 (85) Дата начала рассмотрения заявки PCT на национальной фазе: 10.05.2018 (86) Заявка PCT: DE 2015/100420 ...

Method for suppressing echo signals of a trailer device on a motor vehicle, driver assistance unit, and motor vehicle

본 발명은 초음파 센서 장치(3)가 자동차(1)의 주위에 있는 물체(11)의 검출을 수행하는데 사용되는 자동차(1)의 후방 영역(4)에 배열되는 다수의 초음파 센서(5, 6, 7)를 가지는 초음파 센서 장치(3)를 작동시키기 위한 방법에 관한 것이며, 여기서 제1 초음파 센서(6)는 후방 영역(4)에 배열되는 트레일러 장치(10)와 상이한 물체(11)를 검출하기 위한 물체 검출 모드에서 단지, 적어도 하나의 다른 초음파 센서(5, 7)에 의해 전송되는 전송 신호로부터의 에코 신호를 수신할 목적으로만 작동하며, 이러한 제1 초음파 센서(6)로부터의 전송 신호의 송신은 방지된다. 본 발명은 또한, 운전자 보조 장치(2) 및 자동차(1)에 관한 것이다. The present invention is characterized in that the ultrasonic sensor device 3 comprises a plurality of ultrasonic sensors 5 and 6 arranged in the rear region 4 of the automobile 1 used for performing detection of the object 11 around the automobile 1 Wherein the first ultrasonic sensor 6 detects a different object 11 from the trailer device 10 arranged in the rear region 4, In the object detection mode for the first ultrasonic sensor 6, only the purpose of receiving an echo signal from the transmission signal transmitted by at least one other ultrasonic sensor 5, 7, Is prevented. The present invention also relates to a driver assistance device (2) and a vehicle (1).

Distance measurement apparatus

본 발명의 일 실시예에 따른 거리 측정 장치는, 초음파를 이용하여 임의의 물체와의 거리를 측정하는 거리 측정 장치에 있어서, 소정의 신호를 기초로 초음파를 발생시키는 초음파 송신부; 소정의 초음파를 감지하는 초음파 수신부; 및 상기 소정의 신호를 발생시켜 상기 소정의 신호를 상기 초음파 송신부에 전달하고, 상기 초음파 수신부를 통해 감지된 초음파를 기초로 산출된 정보인 검출 정보를 기초로 상기 거리 측정 장치와 상기 임의의 물체 간의 거리를 연산하는 제어부;를 포함하고, 상기 초음파 송신부는, 상기 제어부로부터 전달되는 제1 신호를 기초로 제1 초음파를 발생시키고, 상기 제어부로부터 전달되는 제2 신호를 기초로 제2 초음파를 발생시키며, 상기 제어부는, 상기 제1 신호 및 상기 제2 신호 중 하나의 신호를 선택적으로 발생시키며, 상기 제어부가 어떤 신호를 발생하여야 하는지 와 관련된 저장 정보인 내역 정보를 기초로 제1 신호 또는 제2 신호의 발생 여부를 결정할 수 있다.

Sensor device and method to control operation of sensor device

FIELD: instrumentation. SUBSTANCE: used to control an ultrasonic sensor by characteristic of sensor impedance. The substance of the invention consists in the fact that a sensor device comprises a sensor, first of all, an ultrasonic sensor, having facilities for generation and detection of acoustic waves, besides, detection facilities convert the received acoustic waves into electric signals analysed by means of a signal processing unit, at the same time it comprises a device of functional control, made as capable of detection of sensor impedance characteristic depending on excitation frequency, besides, the device of functional control is made so that during measurement of impedance, oscillations are excited with amplitude that is lower compared to the result of regular measurement, or so that to perform measurements of impedance in intervals between periods of sensor operation in regular mode of measurements. EFFECT: provision of possibility to minimise noise during regular functioning of a sensor device, and also provision of early detection of sensor fault. 15 cl, 2 dwg РОССИЙСКАЯ ФЕДЕРАЦИЯ (19) RU (11) (51) МПК G01H 3/00 (13) 2 529 671 C2 (2006.01) ФЕДЕРАЛЬНАЯ СЛУЖБА ПО ИНТЕЛЛЕКТУАЛЬНОЙ СОБСТВЕННОСТИ (12) ОПИСАНИЕ (21)(22) Заявка: ИЗОБРЕТЕНИЯ К ПАТЕНТУ 2011119221/28, 24.08.2009 (24) Дата начала отсчета срока действия патента: 24.08.2009 Приоритет(ы): (30) Конвенционный приоритет: (43) Дата публикации заявки: 27.11.2012 Бюл. № 33 (73) Патентообладатель(и): РОБЕРТ БОШ ГМБХ (DE) R U 14.10.2008 DE 102008042820.5 (72) Автор(ы): Мартин РАЙХЕ (DE), Михаэль ФРАНК (DE), Дирк ШМИД (DE), Петер ПРАЙССЛЕР (DE), Карл-Хайнц РИХТЕР (DE) (45) Опубликовано: 27.09.2014 Бюл. № 27 C 2 C 2 Mathews, Sensor Health Diagnostics for Piezoelectric-Based SHM Systems, volume 2, Structural health monitoring 2007: quantification, validation, and implementation; proceedings of the 6th International Workshop on Structural Health Monitoring, Stanford University, Stanford, CA, September 11-13, ...

Fluid level measuring method and the system that is used for this method

一种超声波系统，用于测量贮存器中的流体深度，包括：超声波发射机构，用于从相对于贮存器的第一位置向贮存器中的流体的表面发射超声波检测波束，产生超声波检测波束的路径的至少一部分，该至少一部分大体垂直于贮存器的底部并限定与贮存器的底部相交的轴线；该第一位置靠近贮存器的底部；超声波接收机构，用于在偏离第一位置的第二位置处接收从贮存器中的流体的表面反射的超声波检测波束的回波；和确定机构，用于利用从超声波检测波束接收的回波与第一位置和第二位置之间的距离来确定流体深度。这样的系统允许消除由换能器盲区导致的限制，而不需要使用波导。参考标靶可以用于针对贮存器中的流体混合物的声速校准该系统，并用于测量流体混合物密度。

Method and device for determining the level of charge in an enclosure

ULTRASOUND SENSOR WITH SEIZURE BY BLOCKING

Capteur à ultrasons (10) conçu pour détecter une distance et ayant une surface extérieure de transducteur (12). La surface extérieure (12) comporte un capteur de blocage (20, 22) ayant une surface (30) au niveau de la surface extérieure (12) du transducteur. Le capteur de blocage (20, 22) est sensible à une propriété électrique ou à une température à sa surface (30).

Device for driving via a piezoelectric transducer the displacements of a movable element forming part of a telescopic shock absorber with respect to a fixed part

Device for driving via a piezoelectric transducer the displacements of a movable element forming part of a telescopic shock absorber with respect to a fixed part. It comprises first means 11 for emission of a pressure wave, preferably ultrasonic, and first electrical means for detection of the pressure wave which are fixed to the movable part 3 or to the fixed part 1, 2 in order to direct the pressure waves towards the other of the movable 3 or fixed 1, 2 parts and in order to detect the reflected waves, respectively, and a processing and control circuit linked to the means 11 for emission and detection of the pressure wave and designed in such a way as to deliver electrical signals representing the time elapsed between the emission of the pressure waves by the emission means 11 and the reception of the corresponding echo signal by the detection means 11.

METHOD FOR ADAPTING THE OPERATION OF THE OPERATING CONTROL OF AN ULTRASONIC TRANSDUCER AND THE CORRESPONDING TRANSDUCER

Procédé pour détecter un défaut de fonctionnement d'un transducteur à ultrasons consistant à : - appliquer un signal au transducteur (1), - déterminer l'impédance du convertisseur (1) pour ce signal, et la comparer à une référence (10) pour détecter un défaut de fonctionnement notamment si la fréquence de points caractéristiques notamment de valeurs extrêmes (21, 22, 23) de l'impédance (20) et les fréquences : correspondantes (11, 12, 13) de la référence (10) sont dans un rapport prédéfini. A method for detecting a malfunction of an ultrasonic transducer comprising: - applying a signal to the transducer (1), - determining the impedance of the converter (1) for this signal, and comparing it to a reference (10) for detecting a malfunction, especially if the frequency of characteristic points, in particular extreme values (21, 22, 23) of the impedance (20) and the corresponding frequencies (11, 12, 13) of the reference (10) are in a predefined report.

Position control system for a construction implement such as a road grader

An ultrasonic sensor for a construction implement is disclosed which provides an indication of the position of the sensor relative to a reference surface in two dimensions. In a preferred embodiment of the invention, a pair of sensors are positioned a predetermined distance from one another to transmit and receive ultrasonic waves to measure the time it takes the waves to travel to the reference surface and be reflected back to the ultrasonic transducers. Additionally, a transducer is disclosed which detects a side lobe of a acoustic wave transmitted by an acoustic transducer whereby the velocity of said acoustic pulse may be calculated.

Sensor system, motor vehicle and method for cleaning an ultrasonic sensor

Sensorsystem (1) zur Detektion von Objekten zur Abstandsmessung für ein Kraftfahrzeug (2), aufweisend mindestens einen Ultraschallsensor (3) mit einem Sensorgehäuse (4) und mindestens einer elektrisch zu Schwingungen erregbaren Membran (5) mit einem Membrandurchmesser (6) sowie eine Kontrolleinheit (7) zum Ansteuern der mindestens einen Membran (5) sowie zum Detektieren von Schwingungen der mindestens einen Membran (5), wobei die Kontrolleinheit (7) ausgebildet ist, in einem Messmodus die mindestens eine Membran (5) zu Schwingungen mit einer Messfrequenz und einer Messamplitude anzuregen, wobei das Sensorsystem (1) zum Verbau in Stoßfängern des Kraftfahrzeugs (1) ausgebildet ist, dadurch gekennzeichnet, dass die Kontrolleinheit (7) ausgebildet ist, die mindestens eine Membran (5) in einem Reinigungsmodus zu derartigen Schwingungen anzuregen, dass das Sensorgehäuse (4) in Schwingungen mit einer Gehäuseamplitude versetzt wird, die mindestens 1% des Membrandurchmessers (6) beträgt. Sensor system (1) for the detection of objects for distance measurement for a motor vehicle (2), comprising at least one ultrasonic sensor (3) with a sensor housing (4) and at least one electrically excitable to vibrations membrane (5) with a membrane diameter (6) and a control unit (7) for driving the at least one membrane (5) and for detecting vibrations of the at least one membrane (5), wherein the control unit (7) is formed, in a measuring mode, the at least one membrane (5) to oscillate at a measuring frequency and a measuring amplitude, wherein the sensor system (1) for mounting in bumpers of the motor vehicle (1) is formed, characterized in that the control unit (7) is adapted to excite the at least one membrane (5) in a cleaning mode to such vibrations that the sensor housing (4) is set in vibration with a housing amplitude which is at least 1% of the membrane diameter (6).

MONITORING DEVICE FOR SENSORS, ESPECIALLY ULTRASONIC SENSORS FOR MOTOR VEHICLE REVERSE MONITORING.

The ultrasonic obstacle sensor (1) incorporates automatic function monitoring in which the ultrasonic waves (5) are reflected from a test surface, simulating an obstacle, with the measured obstacle range compared with the known distance of the test surface. Pref. the automatic function testing is effected by rotating a pin (3) through 90 deg. to project into the path of the ultrasonic waves (5), or by rotating the mounting for the ultrasonic sensor (1) through 180 deg. so that it faces forwards instead of backwards, to face a spaced reference surface.

Distance and pressure measurement within air spring

(57)【要約】 （修正有） 【課題】空気ばね内部の圧力の正確な測定。 【解決手段】超音波パルス／エコー測定装置が、空気ば ねのカバー４に固定されて配置された超音波変換器１ ２，この超音波変換器に固定して配置された基準反射器 １４，ピストン８又はバッファ１８に固定して配置され た目的反射器１６及び送受信／評価電子機器から構成さ れ、空気ばねの内部空間２０内で支配する圧力を正確に 測定するため、基準信号の経過時間と振幅の双方が評価 される。この場合、超音波変換器１２は、λ／４の整合 層を有する。このλ／４の整合層のインピーダンスは、 超音波変換器１２と空気ばねの内部空間２０の周囲の空 気とのインピーダンスから成る幾何学的な媒体に一致す るのではなくて、「不整合」が存在する。

Device for determining the position of a piston in a cylinder

本发明涉及用于确定汽缸(1)中活塞(2)的位置的装置，该装置包括用于向汽缸(1)的内部发送超声波信号并用于接收由活塞(2)反射来的超声波信号的超声波设备(5)。在活塞(2)的前表面(4)上设置有突起(30)，并且该突起具有相对于活塞(2)的前表面(4)偏移特定高度的前表面(31)。突起(31)在工作期间能够到达的活塞位置中孤立。分析装置(7)根据超声波信号在超声波设备(5)和突起(30)的前表面(31)之间的传输时间来确定活塞的位置。

Method for selecting optimization track

根据本发明，介绍一种用于产生用于将部分自动化的或者高自动化的车辆(201)转换为在目标方位(208，209)上的安全的系统状态的信号的方法。首先求取将所述车辆(201)转换为安全的系统状态的必要性。随后确定行驶状态，其中，所述行驶状态包括当前车辆位置。本发明的核心在于实施以下步骤：求取至少一个目标方位(208，209)；求取从所述当前车辆位置到所述至少一个目标方位(208，209)的行驶轨迹(204，205)；评估所述行驶轨迹(204，205)；借助所述所实施的评估选择所述行驶轨迹(204，205)之一；并且基于所述所选择的行驶轨迹(204，205)产生信号。

Ultrasound sensor

This ultrasound sensor has an attachment sensor (8) comprising a variable capacitor (8a) and a fixed capacitor (8b). The variable capacitor includes a sensor electrode (8aa) which is disposed on one surface side of a bottom portion (3a) of a microphone (2), and of which the capacitance value changes due to attachment of foreign matter onto the one surface side. The fixed capacitor includes a first electrode (8ba) connected to the sensor electrode, and a second electrode (8bb) disposed on a member (4, 6, 11) different from a microphone housing and opposite the first electrode. The attachment sensor further comprises an attachment sensing portion (8c) which is connected to the sensor electrode via the fixed capacitor and which causes an alternating-current signal to flow with respect to the fixed capacitor and the variable capacitor to sense attachment of foreign matter onto the one surface.

Method for selecting an optimized trajectory

Erfindungsgemäß wird ein Verfahren zur Erzeugung eines Signals zur Überführung eines teil- oder hochautomatisierten Fahrzeugs (201) in einen sicheren Systemzustand an einer Zielpose (208, 209) vorgestellt. Zunächst findet eine Ermittlung einer Notwendigkeit zur Überführung des Fahrzeugs (201) in einen sicheren Systemzustand statt. Anschließend wird ein Fahrzustand bestimmt, wobei der Fahrzustand die aktuelle Fahrzeugposition umfasst. Der Kern der Erfindung liegt in der Ausführung der folgenden Schritte: Ermittlung wenigstens einer Zielpose (208, 209), Ermittlung von Fahrtrajektorien (204, 205) von der aktuellen Fahrzeugposition zu der wenigstens einen Zielpose (208, 209), Bewertung der Fahrtrajektorien (204, 205), Auswahl einer der Fahrtrajektorien (204, 205) anhand der durchgeführten Bewertung und Erzeugung des Signals auf Basis der ausgewählten Fahrtrajektorie (204, 205). According to the invention, a method for generating a signal for transferring a partially or highly automated vehicle (201) to a safe system state at a target pose (208, 209) is presented. First, a determination is made of a need to transfer the vehicle (201) to a safe system state. Subsequently, a driving state is determined, wherein the driving state includes the current vehicle position. The core of the invention is the execution of the following steps: determination of at least one destination pose (208, 209), determination of travel trajectories (204, 205) from the current vehicle position to the at least one destination pose (208, 209), evaluation of the driving trajectories (204 , 205), selecting one of the driving trajectories (204, 205) based on the evaluation performed and generating the signal based on the selected driving trajectory (204, 205).

System and method for identifying entities using 3D layout

一种计算机实施的方法，其包括：利用至少一个处理器触发声波发生器以生成指向与来自多个实体的实体相关联的3维(3D)布局的预定义声波，其中所述多个实体中的每个实体利用嵌入有预定义数目的3D几何图形的对应3D布局注册；响应于从所述3D布局接收到修改的声波，利用至少一个处理器将所述修改的声波和与所述多个实体相关联的多个已校准声波进行比较，以确定包括所述修改的声波与来自所述多个已校准声波的已校准声波之间的匹配的标识细节；以及基于所述标识细节，利用至少一个处理器标识与所述已校准声波相关的所述实体。还公开了一种系统和介质。

Deicing system for one sensor

Enteisungssystem (12) für einen Sensor (10), umfassend ein Heizelement (32, E) zum Temperieren eines Fluids, einen Strömungsgenerator (30, S) zum Antrieb eines Fluids, sowie ein Abdeckelement (28), welches einen Außenbereich (A) von einem Innenbereich (I) abtrennt, wobei das Abdeckelement (28) derart ausgebildet ist, dass ein von dem Strömungsgenerator (30, S) angetriebenes Fluid an dem Abdeckelement (28) entlangströmt, um das Abdeckelement (28) aufzuheizen.

Method for recognizing a blocked state of an ultrasonic sensor, ultrasonic sensor device and motor vehicle

The invention relates to a method for recognizing a blocked state of an ultrasonic sensor (3) of a motor vehicle (1), in which an actual value detects at least one vibration parameter (fR) of the ultrasonic sensor (3) and is compared to a reference value for recognizing the blocked state by means of an evaluation device (4). An actual temperature (T) is detected by means of a temperature detection device (8) to which the ultrasonic sensor (3) is exposed, and the reference value is determined independently from the actual temperature (T) by means of the evaluation device (4).

Method for operating a motor vehicle and motor vehicle

Die Erfindung betrifft ein Verfahren zum Betreiben eines Kraftfahrzeugs (1), bei welchem durch zumindest einen im aktiven Betrieb betriebenen Ultraschallsensor (3) einer Ultraschallsensorvorrichtung (2) des Kraftfahrzeugs (1) Ultraschallwellen in einen Umgebungsbereich (9) des Kraftfahrzeugs (1) ausgesendet werden, wobei das Kraftfahrzeug (1) als Hybridfahrzeug mit einer Brennkraftmaschine (10) und einer elektrischen Antriebsmaschine (17) ausgestattet wird und zumindest zeitweise in dem aktiven Betrieb des an einem Heck (4) des Kraftfahrzeugs (1) angeordneten Ultraschallsensors (3) das Kraftfahrzeug (1) mit der elektrischen Antriebsmaschine (17) betrieben wird. Die Erfindung betrifft auch ein Kraftfahrzeug (1). The invention relates to a method for operating a motor vehicle (1), in which ultrasound waves are emitted into an ambient region (9) of the motor vehicle (1) by at least one ultrasound sensor (3) of an ultrasonic sensor device (2) of the motor vehicle (1) wherein the motor vehicle (1) is equipped as a hybrid vehicle with an internal combustion engine (10) and an electric drive machine (17) and at least temporarily in the active operation of at a rear (4) of the motor vehicle (1) arranged ultrasonic sensor (3) the motor vehicle (1) with the electric drive machine (17) is operated. The invention also relates to a motor vehicle (1).

Method for operating ultrasonic sensor device for motor car, involves outputting information about obstacle to output device by assigning distance measurement values

The method involves arranging ultrasonic sensors (3-6) in the rear region of a motor vehicle (1), and coupling a fan (10) to a towing hitch (11) of the motor vehicle. The distance measurement values of the coupled fan detected by the ultrasonic sensors are transmitted to an electronic control device (8) of the ultrasonic sensor device (2). The distance measurement values are checked by the control device. The information about an obstacle is output to an output device (9) by assigning the distance measurement values. Independent claims are included for the following: (1) an ultrasonic sensor device; and (2) a motor car.

Vehicle proximity monitoring system with failure detection and method to determine the absence of defects in such a system

Method for operating an ultrasonic sensor device for a motor vehicle with determination of a state of a sound transducer element, ultrasonic sensor device, driver assistance system and motor vehicle

Die Erfindung betrifft ein Verfahren zum Betreiben einer Ultraschallsensorvorrichtung (4) für ein Kraftfahrzeug (1), bei welchem ein Schallwandlerelement (12) eines Ultraschallsensors (10) zum Aussenden eines Ultraschallsignals mit einem Anregungssignal (A) angeregt wird, wobei das Anregungssignal (A) mittels einer Sensorelektronik (13) durch Vorgeben einer elektrischen Spannung und Erzeugen eines elektrischen Stroms bereitgestellt wird, und ein Zustand des Schallwandlerelements (12) anhand des Anregungssignals (A) bestimmt wird, wobei die beim Aussenden des Ultraschallsignals bei der vorgegebenen elektrischen Spannung mittels der Sensorelektronik (13) maximal erzeugbare elektrische Stromstärke (Im) des Stroms bestimmt wird und der Zustand des Schallwandlerelements (12) anhand der von der Sensorelektronik (13) maximal erzeugbaren elektrischen Stromstärke (Im) bestimmt wird. The invention relates to a method for operating an ultrasound sensor device (4) for a motor vehicle (1), in which a sound transducer element (12) of an ultrasound sensor (10) for emitting an ultrasound signal is excited by an excitation signal (A), wherein the exciter signal (A) is provided by means of a sensor electronics (13) by presetting an electrical voltage and generating an electric current, and a state of the sound transducer element (12) based on the excitation signal (A) is determined, wherein the transmission of the ultrasound signal at the predetermined electrical voltage by means of the sensor electronics (13) maximum producible electrical current intensity (Im) of the current is determined and the state of the sound transducer element (12) on the basis of the sensor electronics (13) maximum producible electrical current (Im) is determined.

Method and apparatus for producing an acoustic field

The present invention concerns a method and apparatus for the modulation of an acoustic field for providing tactile sensations. A method of creating haptic feedback using ultrasound is provided. The method comprises the steps of generating a plurality of ultrasound waves with a common focal point using a phased array of ultrasound transducers, the common focal point being a haptic feedback point, and modulating the generation of the ultrasound waves using a waveform selected to produce little or no audible sound at the haptic feedback point.

Sensor with monolithic ultrasonic array

Autonomous vehicle glass cleaning system

A glass cleaning system includes: a housing including at least one peripheral sidewalls being substantially perpendicular relative to a side of a vehicle to which the housing is attached, a cover, and a vision system including at least one sensor and processing circuitry, wherein the vision system is disposed in an interior of the housing, the at least one sensor is communicatively coupled to the processing circuitry, and the vision system is configured to be used with the vehicle to detect surrounding objects and determine distances between said objects and the vehicle; a window mounted as the at least one peripheral sidewall of the housing and configured to tilt towards the interior of the housing into an angled orientation and back; a drain duct disposed in the interior of the housing; and at least one spray nozzle.

ULTRASOUND SENSOR WITH SEIZURE BY BLOCKING

Capteur à ultrasons (10) conçu pour détecter une distance et ayant une surface extérieure de transducteur (12). La surface extérieure (12) comporte un capteur de blocage (20, 22) ayant une surface (30) au niveau de la surface extérieure (12) du transducteur. Le capteur de blocage (20, 22) est sensible à une propriété électrique ou à une température à sa surface (30). An ultrasonic sensor (10) adapted to sense distance and having an outer transducer surface (12). The outer surface (12) includes a blocking sensor (20, 22) having a surface (30) at the outer surface (12) of the transducer. The blockage sensor (20, 22) is sensitive to an electrical property or temperature on its surface (30).

Method for determining frequency of excitation signal of ultrasonic sensor to measure distance between passenger car and vehicle-external object, involves defining frequency of excitation signal based on frequency spectrum of reply signal

The method involves excitation of a swinging member i.e. membrane, of an ultrasonic sensor (3) with a test signal. A reply signal is detected to characterize oscillation of the swinging member due to the excitation with the test signal. Frequency of the excitation signal is defined based on frequency spectrum of the reply signal, where the reply signal of nearly Fourier transformation is subjected. The test signal with greater frequency bandwidth in relation to the excitation signal is produced, where the spectrum is produced exclusively from a decaying portion of the reply signal. The test signal is a sine signal. An independent claim is also included for a driver assistance device.

Method and device for operating an ultrasonic sensor

Method and device for operating an ultrasonic detector.

The sensor of ultrasonic array with monolithic

本发明涉及一种传感器和一种方法，其用于检测该传感器与导向面(5)的相对位置，该传感器具有壳体(1)和电子分析处理装置(7)，该分析处理装置根据测量信号输出关于导向面(5)的位置的测量值。传感器包含、超声波换能器阵列，在该超声波换能器阵列的两个外侧端部上附加地各安装有一个基准超声波换能器并且与底侧(9)间隔开地、与基准压电盘(13)对齐地各安装有一个反射器面(12)，这些反射器面分别相对底侧(9)倾斜45°并且这些反射面指向彼此，并且因此在两个基准超声波换能器之间构成已知长度的基准测量距离(R)。在用于对相对位置进行检测的方法中用通过基准距离中的测量获得的测量值对环境影响程度进行补偿。

Method for detecting malfunctions in the operation of an ultrasound measurement assembly of a motor vehicle and motor vehicle

Method for operating a sensor

Es wird ein Verfahren zum Betreiben eines Sensors (14) zur Umfelderkennung in einem Fahrassistenzsystem (12) eines Fahrzeuges (10) vorgeschlagen, das folgende Schritte umfasst: a. Bereitstellen einer Umfeldkarte (42) umfassend erinnerungsbasierte Messdaten; b. Erfassen von aktuellen Messdaten (44) des Sensors (14) basierend auf dem aktuellen Umfeld; c. Generieren eines Steuersignals (46) basierend auf den aktuellen Messdaten und den entsprechenden erinnerungsbasierten Messdaten; d. Anpassen mindestens eines Parameters (48) des Sensors (14) basierend auf dem generierten Steuersignal. Zudem werden ein Fahrassistenzsystem und ein Computerprogrammprodukt zur Durchführung des Verfahrens vorgeschlagen. A method is proposed for operating a sensor (14) for environment detection in a driver assistance system (12) of a vehicle (10), comprising the following steps: a. Providing an environment map (42) comprising reminder-based measurement data; b. Acquiring current measurement data (44) of the sensor (14) based on the current environment; c. Generating a control signal (46) based on the current measurement data and the corresponding reminder-based measurement data; d. Adjusting at least one parameter (48) of the sensor (14) based on the generated control signal. In addition, a driver assistance system and a computer program product for carrying out the method are proposed.

Method for improved detection of ground echo signals in an ultrasonic sensor of a vehicle

根据本发明，提出一种用于检测车辆(14)的超声传感器(20)的地面回声信号的方法。所述超声传感器发射具有第一频率或第一频率变化过程的信号，所述信号被行车道表面(12)反射，所反射的信号被所述超声传感器和/或车辆的其他超声传感器接收。借助匹配滤波器对所接收的回声信号进行滤波，其中，所述匹配滤波器匹配于所发送的信号并且具有表征频率。如此，由经滤波的信号确定地面回声信号。根据本发明，确定当前车速并且根据当前车速确定所反射的信号的预期多普勒频移。根据所述预期的多普勒频移对第一频率或第一频率变化过程和/或匹配滤波器的所述表征频率进行匹配。

ultrasonic sensor

Es wird ein Ultraschallsensor vorgeschlagen, wobei ein zeitlicher Verlauf der Empfindlichkeit durch Schwellwerte vorgegeben ist, die einzelnen Stützstellen zugeordnet sind. Die zeitliche Lage der Stützstellen für den Ultraschallsensor kann hierbei verändert werden. An ultrasonic sensor is proposed, with a time course of the sensitivity being predetermined by threshold values that are assigned to individual support points. The temporal position of the support points for the ultrasonic sensor can be changed here.

Sensor with monolithic ultrasonic array

A sensor and a method for detecting a position of the sensor relative to a guide surface, comprising a housing and an electronic analysis device which outputs measurement values for the position of the guide surface on the basis of the measurement signals. The sensor contains an ultrasonic transducer array, each of the two outer ends of which is additionally equipped with a respective reference ultrasonic transducer and a respective reflector surface flush with the reference piezo disc at a distance from the base side, said ultrasonic transducers and reflector surfaces being inclined by 45° relative to the base side and pointing towards one another, thus forming a reference measurement path with a known length between the two reference ultrasonic transducers. In the method for detecting the relative position, the measurement values are corrected with respect to environmental influences by measurements in a reference path.

Monitoring equipment for the safety devices used in vehicles when driving in reverse

ABSTRACT OF THE DISCLOSURE A monitoring apparatus for a safety device for driving a vehicle in reverse comprising at least two transmitter/receiver pairs which are mounted at the back of the vehicle and which oper-ate by reflecting sound. Each transmitter/receiver is associated with an electroacoustic transducer. An acoustic shunt is posi-tioned between neighboring transducers. The transmitter/receiver pairs alternate cyclically to acquire an object. The signal re-ceived from a neighboring transmitter is evaluated as a function control signal.

Piezo transducer controller and distance measurement method

本发明涉及压电换能器控制器和距离测量方法。一个示例性控制器实施方案包括：发射器，所述发射器导致压电换能器发生混响；以及线性阻尼模块，所述线性阻尼模块测量所述混响的特性并且基于所述特性而调谐所述压电换能器的分流电阻和分流电抗中的至少一者。

Self-moving device and control method therefor

The present invention relates to a self-moving apparatus and a method for controlling same, the self-moving apparatus including: a housing; a movement module for driving the housing to move; an ultrasonic module configured to transmit an ultrasonic signal and receive an echo signal formed through reflection of an obstacle; and a control module installed on the housing and connected to the ultrasonic module, to implement an ultrasonic detection function by processing the echo signal, thereby controlling a movement mode of the movement module. The control module can control disabling of the ultrasonic detection function according to a received preset signal. The present invention has the following beneficial effect: in a specific scenario, the self-moving apparatus is prevented from abnormally running caused by the ultrasonic detection function.

A method of estimating a height of an object in an environmental region of a motor vehicle by means of an ultrasonic sensor by determining probability values and extracting parameters

Die Erfindung betrifft ein Verfahren zum Schätzen einer Höhe eines Objekts (4) in einem Umgebungsbereich (5) eines Kraftfahrzeugs (1), bei welchem anhand eines von einem Ultraschallsensor (7) des Kraftfahrzeugs (1) ausgesendeten und in dem Umgebungsbereich (5) reflektierten Ultraschallsignals ein Empfangssignal (10) bestimmt wird, wobei das Empfangssignal (10) einen zeitlichen Verlauf von Amplitudenwerten (13) beschriebt, und anhand der Amplitudenwerte (13) eine Höhe des Objekts (4) abgeschätzt wird, wobei für die Amplitudenwerte (13) jeweilige Wahrscheinlichkeitswerte (14) bestimmt werden, welche eine Wahrscheinlichkeit angeben, ob der Amplitudenwert (13) das von dem Objekt (4) in dem Umgebungsbereich (5) reflektierte Ultraschallsignal beschreibt, aus den Amplitudenwerten (13) und den Wahrscheinlichkeitswerten (14) Parameter (16) extrahiert werden und anhand der extrahieren Parameter (16) die Höhe des Objekts (4) abgeschätzt wird. The invention relates to a method for estimating a height of an object (4) in a surrounding area (5) of a motor vehicle (1) in which one of an ultrasound sensor (7) of the motor vehicle (1) emitted and reflected in the surrounding area (5) The received signal (10) describes a temporal progression of amplitude values (13), and an altitude of the object (4) is estimated on the basis of the amplitude values (13), the respective amplitude values (13) being Probability values (14) indicating a probability of whether the amplitude value (13) describes the ultrasonic signal reflected by the object (4) in the surrounding area (5) are determined from the amplitude values (13) and the probability values (14) ) and using the extracted parameters (16) the height of the object (4) is estimated.

Position control system for a construction implement such as a road grader

POSITION CONTROL SYSTEM FOR A CONSTRUCTION IMPLEMENT SUCH AS A ROAD GRADER ABSTRACT OF THE DISCLOSURE An ultrasonic sensor for a construction implement is disclosed which provides an indication of the position of the sensor relative to a reference surface in two dimensions. In a preferred embodiment of the invention, a pair of sensors are positioned a predetermined distance from one another to transmit and receive ultrasonic waves to measure the time it takes the waves to travel to the reference surface and be reflected back to the ultrasonic transducers. Additionally, a transducer is disclosed which detects a side lobe of a acoustic wave transmitted by an acoustic transducer whereby the velocity of said acoustic pulse may be calculated.

Distance measurement and pressure measurement inside air spring

Method, system, and computer program product for determining a blockage of a sensor of a plurality of sensors of an ego vehicle

It is described a method for determining a blockage of a sensor of a plurality of sensors of an ego vehicle, the method comprising: determining an prior blockage probability of the sensor of the plurality of sensors; receiving sensor data of the sensor of the plurality of sensors; determining a performance of the sensor based on the received sensor data; calculating an posterior blockage probability based on the prior blockage probability of the sensor and the performance of the sensor; and determining the blockage of the sensors using the calculated posterior blockage probability.

Monitoring equipment for the safety devices used in vehicles when driving in reverse

A monitoring apparatus for a safety device for driving a vehicle in reverse comprising at least two transmitter/receiver pairs which are mounted at the back of the vehicle and which operate by reflecting sound. Each transmitter/receiver is associated with an electroacoustic transducer. An acoustic shunt is positioned between neighboring transducers. The transmitter/receiver pairs alternate cyclically to acquire an object. The signal received from a neighboring transmitter is evaluated as a function control signal.

Method for operating an ultrasonic sensor device of a motor vehicle, ultrasonic sensor device and motor vehicle

Die Erfindung betrifft ein Verfahren zum Betreiben einer Ultraschallsensorvorrichtung (2) eines Kraftfahrzeugs (1), bei welchem durch zumindest einen Ultraschallsensor (3) der Ultraschallsensorvorrichtung (2) Ultraschallwellen in einen Umgebungsbereich (9) des Kraftfahrzeugs (1) zum Durchführen einer Abstandsmessung ausgesendet werden, wobei anhand von Sensordaten zumindest eines von dem Ultraschallsensor (3) verschiedenen Sensors (18, 19, 20, 21) des Kraftfahrzeugs (1) eine von einer Auspuffanlage (11) des Kraftfahrzeugs (1) in den Umgebungsbereich (9) ausgegebene Abgaswolke (22), an welcher die Ultraschallwellen reflektiert werden, durch die Ultraschallsensorvorrichtung (2) detektiert wird und das Betreiben der Ultraschallsensorvorrichtung (2) abhängig von der Detektion der Abgaswolke (22) erfolgt. The invention relates to a method for operating an ultrasonic sensor device (2) of a motor vehicle (1) in which ultrasound waves are emitted into an ambient region (9) of the motor vehicle (1) for performing a distance measurement by at least one ultrasonic sensor (3) of the ultrasonic sensor device (2) in which an exhaust gas cloud ( 22) on which the ultrasonic waves are reflected is detected by the ultrasonic sensor device (2), and the operation of the ultrasonic sensor device (2) is performed depending on the detection of the exhaust gas cloud (22).

Sensor i.e. ultrasonic sensor, for use in driver assistance device for passenger car, has communication unit, where sensor is designed to output test signal to communication terminal under bypassing of communication unit in test mode

The sensor (3) has a communication terminal for attaching the sensor to a data line (4) of a motor vehicle (1). A communication unit is designed to convert a sensor signal of the sensor into a communication signal, which conforms with a predesignated communication protocol, and to output the communication signal over the terminal such that digital data communication is established between the sensor and a control device (5) of the vehicle. The sensor is designed to output a test signal to the terminal under bypassing of the communication unit in a test mode. Independent claims are also included for the following: (1) a system comprising a driver assistance device (2) a method for operating a sensor.