Method for measuring path and depth of pipeline by radiation method

The invention relates to the technical field of pipeline detection, in particular to a method for measuring the path and depth of a pipeline through a radiation method, and the method comprises the steps: arranging a first group of receiving coils at the upper and lower equal intervals of a transmitting coil, and enabling the first group of receiving coils to receive signals generated by the transmitting coil with the same intensity; the signal intensities of the two coils of the first group of receiving coils can be collected in real time, at the moment, the influence generated by the transmitting coil can be eliminated by subtracting the signal intensities of the two coils, and the main factor influencing the difference value of the signal intensities received by the two coils is the signal radiated by the signal received by the underground pipeline. And finally, solving the distance from the transmitting coil to the underground pipeline, if the distance has a solution, indicating that ...

Bluetooth host-slave two sound track stereophony digital television

The invention discloses a Bluetooth host-slave two sound track stereophony digital television comprising a host-slave picture processor, a first audio decoder and a second audio decoder; wherein the first audio decoder and the second audio decoder are respectively connected with the host-slave picture processor; the other end of the first audio decoder and the other end of the second audio decoder are respectively connected with a first Bluetooth transmitter and a second Bluetooth transmitter; when receiving two groups of audio data, the first audio decoder and the second audio decoder decode the received two groups of received audio data and respectively transmit the decoded audio data to the first Bluetooth transmitter and the second Bluetooth transmitter; the first Bluetooth transmitter and the second Bluetooth transmitter convert the received decoded audio data to simulative signals to realize host-slave two sound track stereophony. Two-channel stereophony can be realized by using the ...

Shoulder safety press lever locking mechanism for recreation facility

A shoulder safety press lever locking mechanism for a recreation facility can realize the stepless adjusting on the locking degree without gaps and shifting. A press shoulder is compressed and released by using a check valve and a two-position two-way valve through a hydraulic cylinder connected onto the press shoulder; safety of riding staff when an oil cylinder fails is ensured due to a secondary safety device, and linkage unlocking is realized.

Method and device for judging fault point locations in cable protective layer fault detection

Overhead line grounding failure locating method

The invention relates to a line failure locating method, in particular to an overhead line grounding failure locating method. Two sensing coils which are arranged in an orthogonal mode are placed right under a line outlet. The two sensing coils are both orthogonal to the direction of a line, wherein the horizontal sensing coil is parallel to the ground, and the vertical sensing coil is perpendicular to the ground. According to the vector analysis method, the vertically-arranged vertical sensing coil and the horizontally-arranged horizontal sensing coil are used for collecting the vertical component and the horizontal component of a magnetic field respectively. If the vertical component is larger than the horizontal component, the line has no failure. If the vertical component is smaller than the horizontal component, the line has failure points. According to the method, the horizontal component and the vertical component are compared to determine failure points, so that the method is convenient ...

Steering parameter tester automatic clamping device

The invention provides a steering parameter tester automatic clamping device. Three clips expand and contract, clamp and release synchronously. A telescopic handle is connected with a big gear which drives three crank gears. The clips are driven by the crank gears to expand and contract synchronously. Clamping wires which are connected with a clamping handle enables the clips to clamp an object and to be fixed in a clip stretching direction. An unlocking button is used for realizing the release of the clips and the freedom of the clip stretching direction.

Power overhead line ground fault distance measuring device

The utility model discloses a ground fault distance measuring device for an overhead power line. The system comprises a signal source, a switching device and a controller, the signal source is used for outputting high-voltage low-frequency alternating-current power supply signals, the switching device is used for switching internal parameters of the ranging system, and the controller is provided with an analog signal acquisition module used for acquiring electrical parameters of two states before and after switching of the switching device. And the controller calculates the distance between the grounding fault point and the power distribution station according to the electrical quantity parameters before and after switching. According to the utility model, the general position of a fault point can be rapidly positioned, the line fault searching time is shortened, and the power supply quality is improved.

Method and device for judging fault point locations in cable protective layer fault detection

The invention relates to a method and a device for judging fault point locations in cable protective layer fault detection, which belong to the technical field of cable sheath fault detection. A stable current rectangular wave signal is applied to a fault cable sheath through a controllable high-voltage DC constant current power supply, and the cable sheath directly flows into the ground through fault points or through a semi-conductor layer through the fault points; the signal is detected on the ground or on the surface of the cable sheath; and the locations of the fault points are judged byanalyzing the duty cycle of the rectangular wave signal, and an indicator is used to display the wave form of the signal and clearly indicates the locations of the fault points. The device comprises the controllable high-voltage DC constant current power supply, a signal detector and a probe, can automatically track the changes to the ground potential with the judgment method, has the advantages of ...

Realize device of distribution lines traveling waves range finding high reliability

The utility model relates to a realize device of distribution lines traveling waves range finding high reliability belongs to electric power system relay protection technical field. It includes a central processing unit, and a central processing unit is connected through high -speed data acquisition unit of travelling wave and three -phase power frequency voltage acquisition circuit respectively to voltage and travelling wave sensor, and a central processing unit passes through communication unit and main website communication, and a central processing unit connects GPS or big dipper timing unit simultaneously. The utility model discloses can provide littleer equipment volume, but the accurate find out the traveling waves from disturb the travelling wave, the failure avoiding breaking down, misrepresent deliberately, improve the reliability of fault locating equipment.

Bluetooth host-slave two sound track stereophony digital television

The invention discloses a Bluetooth host-slave two sound track stereophony digital television comprising a host-slave picture processor, a first audio decoder and a second audio decoder; wherein the first audio decoder and the second audio decoder are respectively connected with the host-slave picture processor; the other end of the first audio decoder and the other end of the second audio decoder are respectively connected with a first Bluetooth transmitter and a second Bluetooth transmitter; when receiving two groups of audio data, the first audio decoder and the second audio decoder decodethe received two groups of received audio data and respectively transmit the decoded audio data to the first Bluetooth transmitter and the second Bluetooth transmitter; the first Bluetooth transmitter and the second Bluetooth transmitter convert the received decoded audio data to simulative signals to realize host-slave two sound track stereophony. Two-channel stereophony can be realized by usingthe ...