倒角切削加工固定装置

气缸盖铣加工固定装置

旋转机构（四工位360度）

五轴产品加工夹具

SUPERCONDUCTING QUANTUM INTERFERENCE DEVICE USING SINGLE OPERATIONAL AMPLIFIER MAGNETIC SENSOR

A superconducting quantum interference device (SQID) using a single operational amplifier magnetic sensor; the magnetic sensor, in place of a pre-amplifier and an integrator in a conventional flux-locked loop (FLL), employs a low noise operational amplifier to amplify SQID voltage signals in open-loop mode, and the open-loop output of the single operational amplifier directly drives a feedback resistor and a feedback coil. The SQUID FLL employing a single operational amplifier has positive and negative terminal input wiring modes, each mode having three optional forms. The sensor employs only one operational amplifier to realize an SQUID FLL, thus having a simple circuit, avoiding the use of an integrator of a conventional circuit, reducing delay of a loop, and assuring the FLL with higher bandwidth, so the sensor is significant for SQID multi-channel application.

Method and device for resisting main lobe suppressing noise interference based on intra-pulse multi-carrier frequency signal radar

The invention discloses a radar main lobe suppression noise interference resisting method based on intra-pulse multi-carrier frequency signals, and the method comprises the steps: 1, transmitting the intra-pulse multi-carrier frequency signals through a radar, and receiving radar echo signals; wherein the intra-pulse multi-carrier frequency signal is composed of LFM signals with non-overlapped frequencies; step 2, performing frequency domain filtering processing on the radar echo signal, and extracting LFM signals with different frequencies by using orthogonality of each signal frequency; 3, performing spectral analysis on the LFM signals with different frequencies in the step 2 by adopting short-time Fourier transform to obtain a time-frequency spectrogram of the LFM signals; 4, the time-frequency spectrogram in the step 3 is detected, signals with noise characteristics in the time-frequency spectrogram are removed, and signals with time-frequency spectrums being oblique lines are reserved ...

Superconducting second-order gradient coil structure, manufacturing method and superconducting quantum interference gradiometer

The invention provides a superconducting second-order gradient coil structure, a manufacturing method and a superconducting quantum interference gradiometer, and relates to the field of superconducting quantum interference devices. The superconducting second-order gradient coil structure comprises a second-order gradient coil support and six second-order gradient coil groups, the second-order gradient coil support comprises a central support and four compensation supports, and each of the six second-order gradient coil groups comprises a central point coil and two symmetrical coils connected with the central point coil. The center point coil of each group is arranged at the center support, the two symmetrical coils of each group are arranged on the two opposite compensation supports respectively, and the six second-order gradient coil groups are used for responding to Gzy, Gxy, Gyy, Gzx, Gyx and Gxx magnetic field gradient components respectively. According to the superconducting second-order ...

Parallel-resistance-free low-temperature superconducting Josephson junction current measurement system and method

The invention relates to a parallel-resistance-free low-temperature superconducting Josephson junction current measurement system and method, and the system comprises a test rod, one end of the test rod is provided with a voltage end and a current end, and the other end of the test rod is connected with a switcher through a cable. The voltage end and the current end are connected with a sample; the switcher is connected with the input end of the filter through a coaxial cable, the output end of the filter is respectively connected with the ampere meter and the voltmeter, and the ampere meter and the voltmeter are connected with the computer through data lines. According to the invention, the problems of insufficient current Ic precision and overlarge uncertainty of the existing low-temperature superconducting JJ without parallel resistors can be solved.

READOUT CIRCUIT AND METHOD FOR DIRECT-READING FLUX MODULATION

A readout circuit (2) for direct-reading flux modulation comprises a SQUID (21); a pre-amplifier (22) configured to amplify an output signal of the SQUID (21); a high-pass filter (23) configured to filter out a direct current component and low-frequency noise; a modulation/demodulation signal generator (24); a demodulator (25) configured to demodulate an output signal of the high-pass filter (23); an integrator (26) configured to integrate and generate a response voltage signal; and a feedback module (27) configured to feed back the response voltage signal to the SQUID (21). Also provided is a readout method for direct-reading flux modulation. In the method, modulation is used to enable an operating point of the SQUID (21) to jump between two operating points having opposite variation trends, and a tested signal is amplified, high-pass filtered, demodulated, integrated, and then fed back to the SQUID (21), so as to lock the operating point. The circuit (2) of the present invention realizes ...

DATA READING METHOD, RAID CONTROLLER, AND STORAGE DEVICE

A data reading method, an RAID controller, and a storage device. The method comprises: receiving a read input/output (IO) request delivered by a host (201); determining, according to the size of the read IO request, an interval of an interval set to which the read IO request belongs (202); the interval set comprising at least two intervals and each interval in the interval set being corresponding to a target delay threshold; adjusting the target delay threshold of the interval in the interval set at the interval of a preset first period according to a preset threshold adjustment policy (203); monitoring a delay value returned by the read IO request (204); and when it is determined that the delay value of the read IO request exceeds the target delay threshold, performing a degraded read operation on the read IO request (205). By means of the method, the average delay of a system can be effectively reduced, and RAID performance of an SSD can be utilized to the greatest extent, thereby improving ...

ELECTROMAGNETIC DIFFERENTIAL SAFETY VALVE

An electromagnetic differential safety valve. A valve flap (18) is provided with a valve core (6) in the extending manner along the closing direction, the valve core (6) runs through a valve seat (4) in the sliding and sealing manners, a high-pressure connector is arranged on one side of the valve flap (18) in the opening direction, and a low-pressure connector is arranged on one side of the valve flap (18) in the closing direction; a circulation port is arranged on the valve seat (4) corresponding to the low-pressure connector, and the valve core (6) is provided with a through path which communicates the circulation port with the valve flap (18); the valve flap (18) is provided with a valve rod (19) in the extending manner along the opening direction, a valve core return spring (10) is mounted on the valve rod (19), and the valve rod (19) is inserted into the valve body (8) in the sliding, sealing and matching manners; a closed chamber which is larger than (6)the opening travel of the ...

SQUID detection module, chip, sensor and magnetic measurement system

The invention provides an SQUID detection module, chip, sensor and magnetic measurement system, the SQUID detection module comprises a feedback coil, an SQUID device and a first Josephson junction, and the SQUID device comprises a second Josephson junction and a third Josephson junction which are connected in parallel; the feedback coil, the SQUID device and the first end of the first Josephson junction are connected together and serve as a first connecting terminal of the SQUID detection module; the second end of the feedback coil is used as a second connecting terminal of the SQUID detection module; the second end of the SQUID device is used as a third connecting terminal of the SQUID detection module; and the second end of the first Josephson junction is used as a fourth connecting terminal of the SQUID detection module. According to the invention, direct-current offset can be effectively suppressed, and the direct-current offset generated by the lead resistor does not influence the ...

Interlocking device of gas insulated switchgear

The invention relates to an interlocking device of gas insulated switchgear. The interlocking device comprises a three-position switching mechanism and a closing lever, the interlocking device is characterized in that the interlocking device comprises an interlocking structure, the interlocking structure is arranged between a three-position switch mechanism and a closing lever, and action limitation of the closing lever and the three-position switch mechanism is controlled through the interlocking structure; simultaneous mechanical interlocking of the parallel double three-position switch mechanism and the circuit breaker mechanism can be effectively realized, and interlocking functions do not influence each other; the mechanical interlocking device has good expansibility and can be applied to mechanical interlocking of single or three three-position switch mechanisms and circuit breaker mechanisms; a driving end is connected with a three-position switch mechanism side in a line-surface ...

Multi-channel full-isolation constant current device and superconducting circuit test system

The invention provides a multi-channel full-isolation constant current device and a superconducting circuit test system, and the device comprises a DC power module which is used for providing N paths of first DC power; the DC-to-DC module converts each path of first DC power supply into a corresponding second DC power supply, and each second DC power supply is an independent power supply; the numerical control constant-current module is used for converting the N paths of second direct-current power supplies into N paths of constant-current sources respectively based on the control signal; n is a natural number greater than 1. According to the invention, full-isolation type constant current output is realized, and independence among channels is ensured; each module is relatively flexible in design, and each channel is relatively independent and easy to expand; the device is high in integration level, small in size and easy to carry; batteries are adopted for power supply, and noise interference ...

Pull rod cam -type travel switch detection device

... 本实用新型涉及种拉杆凸轮式行程开关检测装置，包括用于固定安装待测的行程开关的检测平台和用于与所述行程开关的输入拉杆固连的安装板，将待测行程开关的输入拉杆的往复移动方向定义为上下方向，安装板由直动驱动机构驱动可沿上下方向往复移动以驱动待测行程开关的输入拉杆往复移动，检测装置还包括用于对安装板的往复移动进行检测的位移传感器和用于接收位移传感器输出的检测信号及待测的行程开关所输出的通断信号的信号处理单元。由信号处理单元接收位移传感器所输出的位移信号及待测的行程开关所输出的通断信号，进而可以方便、准确地检测行程开关的各个特性值，实现对行程开关的检测。 ...

Multi-channel numerical control pulse bias source and superconducting test system

The invention provides a multichannel numerical control pulse bias source and a superconducting test system. The multichannel numerical control pulse bias source comprises a numerical control module, a control signal generation module and N paths of output modules, wherein N is a natural number greater than 1; the numerical control module is used for providing N paths of analog voltage signals; the control signal generation module receives a bias clock signal and generates a control signal based on the bias clock signal; wherein the bias clock signal has the same frequency with a working clock of a superconducting circuit connected with the superconducting interface circuit; each output module receives one analog voltage signal and switches on or switches off an output path corresponding to the analog voltage signal based on the control signal so as to obtain N AC pulse bias signals. Synchronous pulse control is adopted, and synchronization of a system clock can be guaranteed; multi-channel ...

Airborne early warning radar interference identification method and device based on deep learning

The invention relates to the technical field of airborne radars, and provides an airborne early warning radar interference identification method and device based on deep learning. The method comprises the following steps: calculating signal power of each type of interference according to airborne early warning radar echo data; according to the signal power of each type of interference, echo signal vectors of each type of interference are constructed; calculating the minimum variance spectrum of each type of interference according to the echo signal vector of each type of interference; performing data marking on the minimum variance spectrum of each type of interference to generate a training data set, and training the convolutional neural network by using the training data set; and performing interference identification by using the trained convolutional neural network. According to the method, the airborne radar signals are processed in advance to obtain different types of interferences ...

Method and device for selecting optimal array element number and array element spacing of end-fire array airborne radar

The invention relates to a method for selecting the optimal array element number and array element spacing of an end-fire array airborne radar, and the method comprises the steps: 1, calculating the gain of an end-fire array antenna under the conditions of different array element numbers and array element spacing, and constructing the clutter noise echo data of the airborne radar; 2, carrying out clutter suppression processing on the data constructed in the step 1 by adopting space-time adaptive processing; 3, the clutter residual power processed in the step 2 is compared with target power, and a constant false alarm detection result is obtained; 4, obtaining a distance-speed two-dimensional blind area graph under each group of repetition frequencies by using a detection result in the step 3; step 5, performing multi-frequency detection on the blind area image in the step 4, and calculating a radar detection distance under a fixed clear area proportion; and 6, according to the farthest ...

DATA INSPECTION METHOD AND DEVICE IN SOLID STATE MEMORY

A data inspection method and device in a solid state memory, relating to the technical field of storage. The method comprises: reading, in a current inspection cycle and according to the time when a memory block mounted in a first linked list group is mounted in the first linked list group, a valid data page stored in the memory block mounted in the first linked list group (201); storing the read valid data page into an enabled memory block, the enabled memory block being a blank memory block used for a data page to be written to (202); mounting the enabled memory block enabled in the inspection cycle to a second linked list group according to the time when the enabled memory block is enabled (203); and when a next inspection cycle of the current inspection cycle starts, using the second linked list group as a first linked list group, and using the first linked list group as a second linked list group (204). On the basis of optimization of data stability, the method can cohere stable data ...

Photovoltaic power station unmanned aerial vehicle inspection method based on spatio-temporal data

The invention discloses an unmanned aerial vehicle inspection method for a photovoltaic power station based on spatio-temporal data, and the method comprises the steps: generating total task information containing the position of a photovoltaic module and a photographing angle, distributing the total task information to an unmanned aerial vehicle group, and enabling each unmanned aerial vehicle to correspond to at least one piece of subtask information; controlling each unmanned aerial vehicle to fly to a specified position according to the respective subtask information, and photographing the corresponding photovoltaic module to obtain image data of the photovoltaic module; analyzing image data shot by the unmanned aerial vehicle marshalling, and determining a photovoltaic module number of an abnormal point; voltage, current, temperature and efficiency parameters of the abnormal point photovoltaic module in the monitoring system at the image generation moment are called, defect diagnosis ...

ELECTRIC BALL VALVE

An electric ball valve comprises: a valve body (1), a motor (2), a protective cover (3) and a switch valve automatic control system. One side of the valve body (1) is provided with an air inlet (4), and the other side of the valve body (1) is provided with an air outlet (5). A valve core (6) and a main shaft (7) are arranged in the valve body (1); the valve core (6) and the main shaft (7) are connected. The protective cover (3) is connected with an upper end part of valve body (1); the motor (2) and the switch valve automatic control system are arranged in the protective cover (3); the valve core (6) is a spherical body formed of one convex spherical face and an end face that is connected to the main shaft (7). The main shaft (7) extends out of the valve body (1) and is connected with the motor (2) and the switch valve automatic control system. The electric ball valve can realize instant opening and instant closing.

Radar target detection method and system based on attention convolutional neural network

The invention provides a radar target detection method and system based on an attention convolutional neural network, and the method comprises the steps: obtaining radar receiving data, carrying out the preprocessing of the radar receiving data, forming a data set, and dividing the data set into a training set and a verification set; and constructing an attention convolutional neural network, training the attention convolutional neural network by using the training set and the data label corresponding to the training set, performing verification by using the verification set, and obtaining a network corresponding to the minimum loss of the verification set as an optimal detection weight network. According to the invention, the learning representation capability and the feature adaptive selection capability of the convolutional neural network can be improved.

Water-soluble ionic liquid microcapsule as well as preparation method and application thereof

The invention discloses a water-soluble ionic liquid microcapsule as well as a preparation method and application thereof, and belongs to the technical field of heavy metal wastewater treatment. The water-soluble ionic liquid microcapsule is formed by wrapping water-soluble ionic liquid with microporous silicon dioxide colloid, hydrophilic ionic liquid serves as a core, the microporous silicon dioxide colloid serves as a shell, the heavy metal ion exchange adsorption function of the hydrophilic ionic liquid can be achieved, and the hydrophilic ionic liquid can be stably packaged in the microcapsule; the adsorbent is especially suitable for adsorption separation of heavy metal ions in water, and can be widely used for separation of heavy metal ions such as arsenic, chromium and uranium in water.

Integrated auxiliary switch switching control device suitable for hydraulic disc spring operating mechanism

The invention discloses an integrated auxiliary switch switching control device suitable for a hydraulic disc spring operating mechanism, and belongs to the technical field of hydraulic disc spring operation. The device comprises an auxiliary switch, a bottom plate, a support, a connecting piece, a square shaft, a crank arm, a rocker, a connecting plate and a rotating block, the support is installed on the connecting piece of a holosymmetric structure, the bottom plate is installed on the side wall of the support, and the auxiliary switch is installed on one side of the bottom plate. The connecting piece of the full-symmetric structure is designed, the production and assembly efficiency is improved, and the part cost is reduced; by designing the integrated auxiliary switch switching control device, the requirements of hydraulic disc spring operating mechanisms matched with different circuit breaker arc extinguish chamber strokes in 252-550V voltage classes on the auxiliary switch switching ...

ENERGY ACCUMULATOR WITH GAS LEAKAGE ALARM DEVICE AND HYDRAULIC OPERATING MECHANISM

An energy accumulator with a gas leakage alarm device and a hydraulic operating mechanism, wherein the energy accumulator with the gas leakage alarm device comprises: an energy accumulator cylinder (1) and a piston (2) arranged in the energy accumulator cylinder, the energy accumulator cylinder (1) is provided with a pre-inflated cavity (32) separated by the piston (2), and the end of the energy accumulator close to the pre-inflated cavity (32) is provided with a piston displacement detection device for detecting the displacement of the piston. Since pressure in the pre-inflated cavity (32) will reduce after the gas therein leaks, the piston will move correspondingly, and thus the location of the piston can be detected via the piston displacement detection device, thereby timely obtaining the condition of gas leakage and setting an alarm location. If it is detected that the piston has moved to the set alarm location, it means that the gas in the pre-inflated cavity (32) has leaked and repairing ...

Expansion target parameter adjustable detection method and system under signal mismatch

The invention relates to an extended target parameter adjustable detection method and system under signal mismatch, and the method comprises the steps: constructing a signal steering vector, a to-be-detected data matrix and a training sample matrix, constructing a sampling covariance matrix through employing the training sample matrix, constructing a whitening matrix through employing the sampling covariance matrix, and carrying out the detection through employing the whitening matrix; the method comprises the following steps: firstly, determining a signal steering vector and a to-be-detected data matrix, then whitening the signal steering vector and the to-be-detected data matrix by using a whitening matrix, then determining an adjustable parameter, further constructing a detection statistic, then determining a detection threshold by using the detection statistic and a false alarm probability, and finally comparing the detection statistic with the detection threshold to judge whether a ...

SQUID detection circuit, sensor and multi-channel magnetic measurement system

The invention provides an SQUID detection circuit, a sensor and a multichannel magnetic measurement system, the SQUID detection circuit comprises a reference resistor and X SQUID detection modules, and each SQUID detection module comprises a feedback coil and an SQUID device; the first end of each SQUID device is connected with the common end and is led out, and the second end of each SQUID device is used as a leading-out end; the first end of the feedback coil series connection structure is connected with the common end, and the second end of the feedback coil series connection structure serves as a leading-out end; one end of the reference resistor is connected with the common end, and the other end serves as a leading-out end. The number of the leads is small, and low-temperature liquid loss is small; voltage offset caused by lead resistance can be effectively eliminated, and drifting of a working point is avoided; the reading circuit is multiplexed, and the electronic circuit size, ...

Airborne radar refined clutter simulation method and device based on priori knowledge

The invention relates to a priori knowledge-based airborne radar refined clutter simulation method, which comprises the following steps of: 1, mapping each information point in a geographic database in a radar beam irradiation range into a corresponding distance unit based on priori knowledge and airborne/radar system parameters; 2, clutter scattering coefficients of all the information points are obtained based on prior knowledge, and the distinguishing unit areas of all the information points are calculated; 3, clutter signals of all information points are calculated; 4, performing terrain shielding judgment on each information point; 5, constructing a space-time error matrix by using priori knowledge; and step 6, calculating a final airborne radar clutter signal. The invention further provides a corresponding airborne radar refined clutter simulation device based on priori knowledge.

Superconducting quantum interferometer current amplification unit, amplifier and chip

The invention provides a superconducting quantum interferometer current amplification unit, amplifier and chip, and the unit comprises a superconducting ring series connection structure which comprises a series connection wire and at least two SQUID superconducting rings; the SQUID superconducting rings are connected in series on the series wire and are sequentially and alternately distributed on the two sides of the series wire, and every two adjacent SQUID superconducting rings are symmetrically distributed about the center of the center of the series wire between the two adjacent SQUID superconducting rings; the series wire is used for providing first bias current for each SQUID superconducting ring; the first wire is located on the first side of the superconducting ring series structure and receives the second bias current. The second wire is located on the second side of the superconducting ring series structure and receives a third bias current; and the current lead is positioned ...

Method and device for designing in-pulse non-uniform large-frequency-offset signal waveform

The invention discloses an intra-pulse non-uniform large-frequency-offset signal waveform design method. The method comprises the steps that 1, an airborne early warning radar transmits an intra-pulse non-uniform large-frequency-offset signal and receives a target echo signal; 2, performing frequency mixing and matched filtering processing on the target echo signal, and establishing a carrier frequency domain steering vector of the echo signal; 3, constructing an expression of a carrier frequency domain static directional diagram according to the carrier frequency domain steering vector of the echo signal in the step 2, and further determining an optimization target function; 4, designing a fitness function optimization model according to the optimization objective function in the step 3 and other constraint conditions; and 5, solving the fitness function optimization model in the step 4 by using a genetic algorithm to obtain an individual with a minimum fitness function value, and taking ...

Airborne early warning radar space-time frequency adaptive main lobe deception jamming resisting method and device

The invention discloses a space-time frequency self-adaptive main lobe deception jamming resisting method for an airborne early warning radar. The method comprises the steps that the airborne early warning radar transmits an intra-pulse multi-carrier frequency signal and receives a radar echo signal; performing frequency mixing and matched filtering processing on the radar echo signal, extracting echo signals with different frequencies by using the orthogonal characteristic of signal waveforms, and further constructing a receiving signal comprising a target, clutter and interference; constructing a compensation vector according to the real distance of each distance unit, and carrying out carrier frequency domain distance dependence compensation on a received signal containing a target, clutter and interference; constructing a space-time frequency dimension reduction matrix according to the distance section, the angle and the speed of the preset target, and performing space-time frequency ...

Multi-domain joint anti-composite interference method, device and system

The invention relates to the technical field of signal processing, and provides a multi-domain joint anti-composite interference method, device and system, and the method comprises the steps: selecting a first sub-array and a second sub-array which have a rotation invariant relation, and calculating a polarization parameter according to the relation between the first sub-array and the second sub-array; according to the beam direction and the polarization parameter, performing adaptive anti-composite interference processing, and calculating adaptive sum-difference channel data; respectively carrying out pulse compression to obtain compressed sum-difference channel data, and obtaining a target distance according to a data peak value of the compressed sum-difference channel data; and calculating a target DOA value according to the target distance and the compressed sum-difference channel data. According to the method, accumulation of multiple periods is not needed, interference suppression ...

Magnetic detection element, chip, magnetic field rotation and magnetic gradient tensor detection module

The invention provides a magnetic detection element, a chip, and a magnetic field rotation and magnetic gradient tensor detection module, and the magnetic detection element comprises a first gradient coil and a second gradient coil which are disposed on the same plane, and each comprises a first superconducting coil and a second superconducting coil which are symmetrically distributed along a main symmetric axis; the first and second superconducting coils are wound in opposite directions; the first end of the first superconducting coil is connected with the first end of the second superconducting coil, and the second end is led out at the main symmetry axis to serve as the input end and the output end of the corresponding gradient coil. The main symmetry axes of the first and second gradient coils are perpendicular to each other. According to the invention, the high balance of the integrated gradiometer is fully utilized, the measurement error is reduced, and the environmental adaptability ...

Manual lead screw type lift truck

... 本发明公开了种手动丝杆式升降车，包括底架，其底部设有滚轮；把手架，其底部组装于所述底架的后侧；两个升降调节支撑架，组装于所述底架的左右两侧；升降台，组装于所述升降调节支撑架的上方；传动组件，组装于所述底架的后侧，且连接于至少个所述升降调节支撑架；手持式驱动杆，组装于所述手把架上，所述手持式驱动杆的底部连接于所述传动组件；所述手持式驱动杆通过传动组件调节所述升降调节支撑架，并通过所述升降调节支撑架调节所述升降台的台面竖直方向的高低度。 ...

Superconducting quantum interference device and system

The invention provides a superconducting quantum interference device and system. The superconducting quantum interference device comprises a non-magnetic Dewar, a superconducting quantum interference device, a low-temperature insertion piece, a low-temperature lead and a read-out control circuit which is formed by integrating a read-out circuit and a control circuit. According to the superconducting quantum interference device, the reading circuit and the control circuit are integrated, so that the integration level of the superconducting quantum interference device is improved, the overall structure of the superconducting quantum interference device is simplified, and the superconducting quantum interference device is convenient to carry and can adapt to testing in a mobile working environment.

Brackish water evaporation utilization system in arid region

The invention discloses an arid region brackish water evaporation utilization system, and belongs to the technical field of brackish water resource utilization, the system comprises a river channel, a water inlet channel, an evaporation utilization system and a water outlet channel, the water inlet channel is arranged on an upstream convex bank of the river channel, the water outlet channel is arranged on the downstream of the river channel, and the evaporation utilization system is arranged between the water inlet channel and the water outlet channel; the device is used for evaporating brackish water and collecting fresh water. By taking water from the convex bank, separating sand through the stop log gate and filtering through the seepage dam, the sand content of water diversion is effectively reduced, blockage of the evaporation pond is avoided, the effective plot ratio is increased, and the evaporation efficiency of brackish water is improved. The problem of insufficient water resources ...