CN216900722U - Electric field intensity testing arrangement based on unmanned aerial vehicle - Google Patents

Abstract

The utility model discloses an electric field strength testing device based on an unmanned aerial vehicle, comprising an unmanned aerial vehicle, an electric field strength testing unit, a host computer, a wireless transceiver unit and a wireless receiving unit. The electric field strength testing unit is suspended from the unmanned aerial vehicle. On the machine, the electric field strength test unit includes a measurement probe, a filter amplifier, an AD converter and a processor, the measurement probe, filter amplifier, AD converter and processor are connected in sequence, and the electric field strength test unit is sequentially connected through the wireless The transceiver unit is connected, and the host is respectively connected with the wireless transceiver unit and the wireless receiving unit; the measurement probe includes three parallel pole plates and three coils, and the three parallel pole plates are orthogonal to each other, wherein each parallel pole plate is The plates and the coils are arranged in one-to-one correspondence, and the parallel pole plates are arranged in parallel with the corresponding coils; the thickness of each of the parallel pole plates is 2-4mm. The utility model has the advantages of accurate and reliable measurement, large measurement range and the like.

Description

An electric field strength test device based on unmanned aerial vehicle

technical field

The utility model mainly relates to the technical field of substations, in particular to an electric field strength testing device based on an unmanned aerial vehicle.

Background technique

Due to the complex internal environment of the substation, conventional electric field strength testing methods are difficult to meet the actual needs of production. Using drones to carry sensors for detection is helpful to monitor the operation of power equipment. There are many types of power frequency field strength meters currently used in the Chinese market, such as foreign NARDA, domestic SST, SY50L, etc. These field strength meters are used in occupational health evaluation, environmental testing and other occasions, and the general range can only reach 100kV/ m, and the voltage of the high-voltage leads on the UHV insulating support we need to detect is higher than 200kV, and the object we need to measure is the surface of the insulating support, and the sensor is close to the high-voltage object. According to the field strength formula E=U/d, U is the induced voltage around the measured object (unit is V), d is the distance (m) between the measured object and the sensor, when the voltage is higher than 200kV and the distance between the sensor and the measured object is less than 20cm, the induced electric field at this time The intensity will be far greater than the range that can be detected by the field strength meter that can be provided in China.

Utility model content

The technical problem to be solved by the present utility model is that: aiming at the problems existing in the prior art, the present utility model provides an electric field strength testing device based on an unmanned aerial vehicle with a simple structure, accurate and reliable measurement.

In order to solve the above-mentioned technical problems, the technical scheme proposed by the present utility model is:

An electric field strength test device based on a drone, comprising a drone, an electric field strength test unit, a host, a wireless transceiver unit and a wireless receiving unit, the electric field strength test unit is suspended on the drone, the electric field strength The strength test unit includes a measuring probe, a filter amplifier, an AD converter and a processor, the measuring probe, the filter amplifier, the AD converter and the processor are connected in sequence, and the electric field strength test unit is sequentially connected through the wireless transceiver unit, so the The host is respectively connected with the wireless transceiver unit and the wireless receiving unit; the measuring probe includes three parallel pole plates and three coils, and the three parallel pole plates are orthogonal to each other, wherein each parallel pole plate and the coil are one by one. Correspondingly arranged, and the parallel pole plates are arranged in parallel with the corresponding coils; the thickness of each of the parallel pole plates is 2-4mm.

As a further improvement of the above technical solution:

The electric field strength testing unit is optically connected to the wireless transceiver unit, and the host is optically connected to the wireless receiving unit.

The wireless transceiver unit is wirelessly connected with the host.

The measuring probe, filter amplifier, AD converter and processor are all integrated in a casing.

The bottom of the housing is provided with a power optical fiber inlet and an optical fiber connector, the power optical fiber inlet is used for providing a power interface, and the optical fiber connector is used for connecting with the wireless transceiver unit.

The parallel polar plate includes an intermediate layer, and the upper and lower surfaces of the intermediate layer are covered with copper layers.

The intermediate layer is a glass fiber layer.

The thickness of the copper layer is 0.1-0.3um.

It also includes a display unit, the display unit is connected with the wireless receiving unit, and is used for displaying the detection result of the field strength.

The electric field strength testing unit is fixed on the drone through a fixing frame.

Compared with the prior art, the advantages of the present utility model are:

The utility model fixes the electric field strength testing unit on the unmanned aerial vehicle, and the unmanned aerial vehicle carries the corresponding measuring probe close to the ultra-high voltage (transmission voltage higher than 200kV) insulating support for measurement, which has high safety and reliability; A wireless transceiver unit is added between the two, so that the electric field strength test unit mounted on the drone can read the detection data of the surrounding field strength of the high-voltage insulating pillar with a transmission voltage above 200kV, so as to ensure the safety and reliability of the test; The above-mentioned electric field strength testing unit is connected with the optical fiber of the wireless transceiver unit, so as to ensure the reliability of data transmission of the electric field strength testing unit, and can avoid the interference of external signals on the transmission of detection signals.

Aiming at the power frequency high voltage field, the utility model changes the thickness of the parallel plate in the original measuring probe to twice the original, the induced voltage is reduced to about 1/2 of the original, and the range is increased by about two times, which can effectively meet the detection of high pressure fields.

Description of drawings

Fig. 1 is the embodiment diagram of the utility model in concrete application.

FIG. 2 is a block diagram of the electric field strength testing unit of the present invention in an embodiment.

FIG. 3 is a three-dimensional structural diagram of an electric field strength testing unit in an embodiment of the present invention.

FIG. 4 is a bottom structure diagram of the electric field strength testing unit in the embodiment of the present invention.

FIG. 5 is a schematic structural diagram of a measuring probe in an embodiment of the present invention.

FIG. 6 is a schematic view of the dimensions of the parallel polar plates of the measuring probe in the embodiment of the present invention.

Legend: 1. UAV; 2. Electric field strength test unit; 201, Measuring probe; 2011, Parallel plate; 20111, Intermediate layer; 20112, Copper layer; 2012, Coil; 202, Filter amplifier; 203, AD conversion device; 204, processor; 205, housing; 206, power fiber inlet; 207, power toggle switch; 208, mounting hole; 209, optical fiber connector; 3, wireless transceiver unit; 4, host; 5, wireless receiving unit .

Detailed ways

The present utility model will be further described below with reference to the accompanying drawings and specific embodiments.

As shown in Figure 1, the electric field strength testing device based on the unmanned aerial vehicle according to the embodiment of the present utility model comprises an unmanned aerial vehicle 1, an electric field strength testing unit 2, a field strength testing host 4, a wireless transceiver unit 3 and a wireless receiving unit 5, The electric field strength test unit 2 is suspended on the drone 1; the electric field strength test unit 2 includes a measurement probe 201, a filter amplifier 202, an AD converter 203 and a processor 204, a measurement probe 201, a filter amplifier 202, an AD converter 203 and The processor 204 is connected in sequence, and the electric field strength testing unit 2 is connected in sequence through the wireless transceiver unit 3, the host 4 and the wireless receiving unit 5; They are orthogonal to each other, wherein each parallel pole plate 2011 and the coil 2012 are arranged in one-to-one correspondence, and the parallel pole plate 2011 and the corresponding coil 2012 are arranged in parallel; as shown in FIG. 5 , specifically, the three parallel pole plates 2011 are respectively XOY plane parallel plate 2011, XOZ plane parallel plate 2011 and YOZ plane parallel plate 2011; the three coils 2012 are XOY plane coil 2012, XOZ plane coil 2012 and YOZ plane coil 2012, XOY plane parallel plate 2011 and XOY plane The surface coil 2012 is parallel, the XOZ surface parallel pole plate 2011 is parallel to the XOZ surface coil 2012, and the YOZ surface parallel pole plate 2011 is parallel to the YOZ surface coil 2012; wherein the thickness of each parallel pole plate 2011 is 2-4mm (preferably 3mm). When the parallel pole plate 2011 enters the electric field, the corresponding electric field intensity is determined by measuring the voltage across the detection parallel pole plate 2011 . The electric field strength testing unit 2 is optically connected to the wireless transceiver unit 3 , the host 4 is optically connected to the wireless receiving unit 5 , and the wireless transceiver unit 3 is wirelessly connected to the host 4 . Of course, if conditions permit, the wireless transceiver unit 3 and the host 4 can be connected by optical fibers.

Specifically, the electric field strength testing unit 2 is fixed to the UAV 1 through the fixing frame, and the UAV 1 carries the corresponding measuring probe 201 close to the UHV (transmission voltage higher than 200kV) insulating support, and the measuring probe 201 detects the UHV insulation The electric field on the surface of the bracket, the detected data is amplified by the filter amplifier 202, and then converted into a digital signal by the AD converter 203, and then sent to the processor 204 to obtain the corresponding electric field signal, and then sent to the host 4 through the wireless receiving unit 5, and the host 4 sends it again To the wireless receiving unit 5; wherein the wireless transceiver unit 3 is added between the electric field strength test unit 2 and the host 4, thereby realizing that the drone 1 is equipped with the electric field strength test unit 2 for high voltages above the ultra-high voltage (transmission voltage higher than 200kV). The detection data of the electric field strength around the insulating pillar is read to ensure the safety and reliability of the test; wherein the above electric field strength test unit 2 is optically connected to the wireless transceiver unit 3, so as to ensure the reliability of the data transmission of the electric field strength test unit 2 and avoid external signals Interference with detection signal transmission.

In addition, since the measured electric field is a power frequency high voltage field, the voltage can reach up to 600kV. According to the previous experimental calculation, it needs to meet the detection requirements, and the maximum range of the estimated field strength needs to reach 300kV/m. At present, the sensor is the mainstream sensor in the market, and the electric field intensity measurement range is 1V/m-100kV/m, so it is difficult for conventional sensors to meet the measurement requirements.

According to the test data and formula calculation, it can be calculated that when the input voltage is 600kV, the induced voltage is 17.625VRMS, which is about 48Vpp, so the signal must be attenuated to widen the range. According to the field strength formula E=U/d, the parallel polar plate 2011 in the above-mentioned measuring probe 201 is modified from 80mm*80mm*1.5mm to 80mm*80mm*3mm, as shown in FIG. 6 . There is a nonlinear relationship between the thickness of the above-mentioned parallel pole plate 2011 and the range. The thickness of the parallel pole plate 2011 is changed from the previous 1.5mm to 3mm, the induced voltage is reduced to about 1/2 of the original, and the range is increased by about 2 times, which can effectively meet the detection of high pressure fields.

As shown in FIG. 3 and FIG. 4 , in a specific embodiment, the measurement probe 201 , the filter amplifier 202 , the AD converter 203 and the processor 204 are all integrated in a casing 205 . The bottom of the housing 205 is provided with a power optical fiber inlet 206 , an optical fiber connector 209 (including TX and RX), a mounting hole 208 and a power toggle switch 207 . The power optical fiber inlet 206 is used to provide a power interface, and the optical fiber connector 209 is connected to the wireless transceiver unit 3 through optical fibers. The above-mentioned mounting holes 208 are connected to the fixing frame on the UAV 1 through a self-contained thread. Specifically, the parallel polar plate 2011 includes an intermediate layer 20111 (glass fiber layer RF-4), the upper and lower surfaces of the intermediate layer 20111 are covered with a copper layer 20112, and the thickness of the copper layer 20112 is 0.1-0.3um, preferably 0.2um.

In a specific embodiment, a display unit (such as a display terminal) is also included, and the display unit is connected to the wireless receiving unit 5 for displaying the field strength detection result.

Test description: Put the device into a uniform electric field, adjust the voltage value input to the booster through the voltage regulator, and record the field strength distribution value under different voltages and different distances. After testing, the field strength test data of the device between 0m and 100m are basically the same, indicating that the wireless transceiver distance of the device can reach 100m. The input voltage is 1-30kV, the distance between the probe and the transformer bottle is 10-50cm, and the electric field strength test shows that it is normal and meets the requirements. After the modification and optimization of the device, the field strength test value deviates from the real value, and a calibration coefficient needs to be added. The test shows that the calibration coefficient of the field strength test data is 1.85, that is, the true value of E = the test value of E * 1.85, and the final output display value. In the high voltage field, the electric field strength test unit 2 and the host 4 can maintain good wireless transmission performance; the induced electric field strength increases with the increase of the input voltage; the induced electric field strength decreases with the increase of the distance from the measured signal source. Small. The wireless transmission distance, the sensor range and the accuracy of the field strength test data of the utility model can all achieve the expected goals.

The above are only the preferred embodiments of the present utility model, and the protection scope of the present utility model is not limited to the above-mentioned embodiments, and all technical solutions under the idea of the present utility model belong to the protection scope of the present utility model. It should be pointed out that for those skilled in the art, some improvements and modifications without departing from the principle of the present invention should be regarded as the protection scope of the present invention.

Claims (10)

1. an electric field strength testing device based on unmanned aerial vehicle, is characterized in that, comprises unmanned aerial vehicle (1), electric field strength testing unit (2), main engine (4), wireless transceiver unit (3) and wireless receiving unit ( 5), the electric field strength test unit (2) is suspended on the unmanned aerial vehicle (1), and the electric field strength test unit (2) comprises a measurement probe (201), a filter amplifier (202), an AD converter (203) and a processor (204), the measuring probe (201), the filter amplifier (202), the AD converter (203) and the processor (204) are connected in sequence, and the electric field strength testing unit (2) is sequentially connected through The wireless transceiver unit (3) is connected, and the host computer (4) is respectively connected with the wireless transceiver unit (3) and the wireless receiving unit (5); the measurement probe (201) includes three parallel polar plates (2011) and Three coils (2012), the three parallel pole plates (2011) are orthogonal to each other, wherein each parallel pole plate (2011) is arranged in a one-to-one correspondence with the coil (2012), and the parallel pole plates (2011) correspond to The coils (2012) are arranged in parallel; the thickness of each of the parallel plates (2011) is 2-4mm. 2. The electric field strength testing device based on unmanned aerial vehicle according to claim 1, wherein the electric field strength testing unit (2) is optically connected to the wireless transceiver unit (3), and the host (4) It is optically connected to the wireless receiving unit (5). 3 . The electric field strength testing device based on unmanned aerial vehicle according to claim 2 , wherein the wireless transceiver unit ( 3 ) and the host computer ( 4 ) are wirelessly connected. 4 . 4. The electric field strength testing device based on unmanned aerial vehicle according to claim 1 or 2 or 3, characterized in that, the measurement probe (201), filter amplifier (202), AD converter (203) and processor (204) are integrated into a housing (205). 5. The electric field strength testing device based on unmanned aerial vehicle according to claim 4, characterized in that, the bottom of the housing (205) is provided with a power supply optical fiber inlet (206) and an optical fiber connector (209), the power supply The optical fiber inlet (206) is used to provide a power interface, and the optical fiber connector (209) is used to connect with the wireless transceiver unit (3). 6. The electric field strength testing device based on unmanned aerial vehicle according to claim 1 or 2 or 3, wherein the parallel polar plate (2011) comprises an intermediate layer (20111), and the intermediate layer (20111) has a The upper and lower surfaces are covered with copper layers (20112). 7. The electric field strength testing device based on unmanned aerial vehicle according to claim 6, characterized in that, the intermediate layer (20111) is a glass fiber layer. 8. The electric field strength testing device based on unmanned aerial vehicle according to claim 6, characterized in that, the thickness of the copper layer (20112) is 0.1-0.3um. 9. The electric field strength testing device based on unmanned aerial vehicle according to claim 1 or 2 or 3, characterized in that, further comprising a display unit, the display unit is connected with the wireless receiving unit (5), for measuring the field strength The test results are displayed. 10 . The electric field strength testing device based on an unmanned aerial vehicle according to claim 1 , wherein the electric field strength testing unit ( 2 ) is fixed on the unmanned aerial vehicle ( 1 ) through a fixing frame. 11 .

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