CN204203365U - power frequency electromagnetic field monitor and monitoring assembly device - Google Patents
power frequency electromagnetic field monitor and monitoring assembly device Download PDFInfo
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- CN204203365U CN204203365U CN201420642520.8U CN201420642520U CN204203365U CN 204203365 U CN204203365 U CN 204203365U CN 201420642520 U CN201420642520 U CN 201420642520U CN 204203365 U CN204203365 U CN 204203365U
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Abstract
The utility model relates to electromagnetic monitoring technical field, particularly relates to power frequency electromagnetic field monitor and monitoring assembly device.This power frequency electromagnetic field monitor, comprising: electric field probe, magnet field probe, main frame and photoelectric switching circuit; Electric field probe, magnet field probe, photoelectric switching circuit are connected with main frame respectively, and are set to one with main frame; Photoelectric switching circuit is used for the electric field intensity and the magnetic field intensity that the electric field intensity of the electrical signal form of main frame output and magnetic field intensity are converted to light signal form, and gives the data acquisition transmitting device for Monitoring Data collect and transmit by Optical Fiber Transmission.This power frequency electromagnetic field monitor that the utility model provides and monitoring assembly device, reduce the power consumption of power frequency electromagnetic field monitor; And data can not form interference to original electric field of monitored area in transmitting procedure, achieve the real time on-line monitoring transmission of power frequency electromagnetic field Monitoring Data, meet the demand of power frequency electromagnetic field monitor Real-Time Monitoring transmission power frequency electromagnet field data.
Description
Technical field
The utility model relates to electromagnetic monitoring technical field, in particular to power frequency electromagnetic field monitor and monitoring assembly device.
Background technology
Existing power frequency electromagnetic field monitoring instrument, power frequency electric field measuring sonde wherein, what the overwhelming majority adopted is the suspension Dam Configuration Design recommended in standard " power frequency electric field measurement " (GB/T 12720-91), this floating type designing requirement probe can not have ground connection, long external line can not be had, when also requiring to measure, probe is away from operator or metal object etc., operator is avoided to produce distortion to field, also require that the size of popping one's head in is little as far as possible, avoid the distortion self causing original of popping one's head in.
By the difference of its power supply mode and data transfer mode, existing two kinds of power frequency electromagnetic fields monitoring solution comprises:
(1) as shown in Figure 1, power frequency electromagnetic field monitor comprises electric field probe 1, magnet field probe 3 and main frame 2, wherein magnet field probe 3 and main frame 2 are set to one, electric field probe 1 separates with main frame 2, electric field probe 1 and main frame 2 pass through Fiber connection, in main frame 2, carry out reading measurement, electric field probe 1 adopts internal battery to power.
(2) as shown in Figure 2, electric field probe 1, magnet field probe 3 are set to one with main frame 2; When electric field probe 1 carries out electric field monitoring, main frame 2 does not transmit data; The monitoring of electric field probe 1 terminates aft engine 2 and by wireless communication module 4, the electric field data of acquisition and magnetic field data is uploaded to computing machine and carry out reading.The power frequency electromagnetic field monitor of this kind of form adopts external solar power supply apparatus 5 or internal battery to power, as solar power supply apparatus in Fig. 25 is arranged on supporting bracket 6, solar power supply apparatus 5 by supply lines 7 be electric field probe 1, magnet field probe 3 powers with main frame 2.
In above-mentioned (1) kind scheme, because electric field probe 1 internal battery power supply capacity is limited, the field monitoring of short time can only be carried out.In (2) kind scheme, externally send data because needs intermittently start, and because of wireless transmission method power dissipation ratio comparatively large, external solar power supply apparatus 5 and internal battery are powered all can not support real time on-line monitoring.
Current, the demand of the electric power facility electromagnetic environment on-line monitorings such as transformer station and externally real-time release data shows especially, need the technical bottleneck breaking through power frequency electric field real time on-line monitoring, need the key issue solved to be to the problem of power frequency electric field probe 1 power supply for a long time under the prerequisite not affecting power frequency electric field measurement.Someone is on the basis of above-mentioned first kind of way, proposes the solution introducing external power supply to power frequency electric field probe 1, is divided into duration of charging and working time, but, in the time of charging, electric field probe 1 cisco unity malfunction; Operationally, disconnect external power supply, but supply lines is still suspended on probe, although have employed relay open-circuit line, maintain the feature of probe suspension build, the introducing of this supply lines still result in the distortion of field, although have employed the way of late time data correction, but and fail fundamentally to solve the problem of distortion, measuring error is very large, still infeasible.
Find out thus, existing power frequency electromagnetic field monitor is discontented with the demand of sufficient Real-Time Monitoring transmission power frequency electromagnet field data.
Utility model content
The purpose of this utility model is to provide power frequency electromagnetic field monitor and monitoring assembly device, to solve the above problems.
Embodiments provides a kind of power frequency electromagnetic field monitor of the present utility model, comprising: electric field probe, magnet field probe, main frame and photoelectric switching circuit; Described electric field probe, described magnet field probe, described photoelectric switching circuit are connected with described main frame respectively, and are set to one with described main frame; Described photoelectric switching circuit is used for electric field intensity and the magnetic field intensity that the electric field intensity of electrical signal form that exported by described main frame and magnetic field intensity are converted to light signal form, and gives the data acquisition transmitting device for Monitoring Data collect and transmit by Optical Fiber Transmission.
Preferably, described main frame comprises main control chip; Described main control chip comprises the Transistor-Transistor Logic level pin of electric field intensity for exporting electrical signal form and magnetic field intensity; Described Transistor-Transistor Logic level pin is connected with the input end of described photoelectric switching circuit.
Preferably, described power frequency electromagnetic field monitor, also comprises supporting bracket; Be set to the described electric field probe of one, magnet field probe, main frame and photoelectric switching circuit be fixedly mounted on described supporting bracket.
Preferably, described power frequency electromagnetic field monitor, also comprises: the first solar power supply apparatus, for providing power supply for described electric field probe, magnet field probe, main frame and photoelectric switching circuit; Described first solar power supply apparatus is arranged on described supporting bracket by angular adjustment parts.
Preferably, described supporting bracket comprises the stator for installing described first solar power supply apparatus; Described first solar power supply apparatus comprises solar panels and accumulator; Described accumulator is arranged on the back of described solar panels; The top of described solar panels is connected with described stator by loose-leaf; The both sides of described solar panels are connected with described supporting bracket respectively by arc support.
Preferably, along the bearing of trend of described arc support, described arc support is arranged at intervals with multiple mounting hole; Described arc support is arranged on described supporting bracket by the one or more bolts that utilize in described mounting hole.
The utility model embodiment still provides a kind of power frequency electromagnetic field monitoring assembly device, comprises data acquisition transmitting device and above-mentioned power frequency electromagnetic field monitor; Described data acquisition transmitting device is connected with described power frequency electromagnetic field monitor by optical fiber.
Preferably, spacing >=1.5 meter between described data acquisition transmitting device and described power frequency electromagnetic field monitor.
Preferably, described power frequency electromagnetic field monitoring assembly device, also comprises the second solar power supply apparatus and/or ac power supply, for powering for described data acquisition transmitting device.
The power frequency electromagnetic field monitor that the utility model embodiment provides and monitoring assembly device, eliminate the wireless communication module that in existing power frequency electromagnetic field monitor, power consumption is maximum, add the photoelectric switching circuit that power consumption is less, reduce the power consumption of power frequency electromagnetic field monitor; And the electric field intensity of monitoring acquisition and magnetic field strength date are sent to the data acquisition transmitting device outside independent of power frequency electromagnetic field monitor with light signal form by power frequency electromagnetic field monitor, data can not form interference to original electric field of monitored area in transmitting procedure, make the transmission simultaneously can carrying out data in electric field observation process, achieve the real time on-line monitoring transmission of power frequency electromagnetic field Monitoring Data, meet the demand of power frequency electromagnetic field monitor Real-Time Monitoring transmission power frequency electromagnet field data.
Accompanying drawing explanation
Fig. 1 shows the structural representation of a kind of power frequency electromagnetic field monitor of the prior art;
Fig. 2 shows the structural representation of another kind of power frequency electromagnetic field monitor of the prior art;
Fig. 3 shows the structural representation of power frequency electromagnetic field monitor in the utility model embodiment;
Fig. 4 shows the improvement comparison diagram of power frequency electromagnetic field monitor of the present utility model and power frequency electromagnetic field monitor of the prior art;
Reference numeral: 1-electric field probe, 2-main frame, 3-magnet field probe, 4-wireless communication module, 5-solar power supply apparatus, 6-supporting bracket, 7-supply lines, 8-photoelectric switching circuit, 9-first solar power supply apparatus, 91-solar panels, 92-accumulator, 10-arc support, 101-mounting hole, 11-stator, 12-supporting bracket, 13-data acquisition transmitting device, 14-optical fiber.
Embodiment
Also by reference to the accompanying drawings the utility model is described in further detail below by specific embodiment.
The utility model provides a kind of power frequency electromagnetic field monitor, as shown in Figure 3, comprising: electric field probe 1, magnet field probe 3, main frame 2 and photoelectric switching circuit 8; Electric field probe 1, magnet field probe 3, photoelectric switching circuit 8 are connected with main frame 2 respectively, and are set to one with main frame 2; Photoelectric switching circuit 8 is converted to electric field intensity and the magnetic field intensity of light signal form for the electric field intensity of electrical signal form that exported by main frame 2 and magnetic field intensity, and is transferred to the data acquisition transmitting device 13 for Monitoring Data collect and transmit by optical fiber 14.
In existing power frequency electromagnetic field monitor, the power consumption of wireless communication module accounts for more than 80% of power consumption in whole power frequency electromagnetic field monitor, the power frequency electromagnetic field monitor of the utility model embodiment removes the maximum wireless communication module of power consumption, increase the photoelectric switching circuit 8 that power consumption is far smaller than wireless communication module, under same condition of power supply, power frequency electromagnetic field monitor of the present utility model can work the longer time.
The power frequency electromagnetic field monitor of the utility model embodiment is after removing wireless communication module, increase photoelectric switching circuit 8, by photoelectric switching circuit 8, the electric field intensity of electrical signal form and magnetic field intensity are converted to electric field intensity and the magnetic field intensity of light signal form, and be transferred to the data acquisition transmitting device 13 for Monitoring Data collect and transmit by optical fiber 14, transmit electric field intensity and magnetic field strength date by data acquisition transmitting device 13 to other computer equipment.
Power frequency electromagnetic field monitor of the present utility model is by independent for the collect and transmit work of electromagnetic field data, complete by independent of the data acquisition transmitting device 13 outside power frequency electromagnetic field monitor, and the data at power frequency electromagnetic field monitor place are transferred to data acquisition transmitting device 13 by light signal form can not produce interference to the original electric field in monitored area, therefore, in electric field probe 1 observation process in power frequency electromagnetic field monitor, the collect and transmit of Monitoring Data can still be carried out by data acquisition transmitting device 13.
To sum up, the electromagnetic field monitor of the utility model embodiment can be lengthened working hours under set condition of power supply, and can carry out real-time Transmission to the electromagnetic field Monitoring Data gathered, and meets the demand of Real-Time Monitoring transmission power frequency electromagnet data.
Existing power frequency electromagnetic field monitor is except being provided with wireless communication module, as shown in Figure 4, generally also be reserved with wired communication interface, as RS232 serial port circuit or usb circuit, to transfer data on computing machine, but RS232 serial port circuit or usb circuit, during work, power consumption is larger.
In order to reduce the power consumption in power frequency electromagnetic field monitor further, the power frequency electromagnetic field monitor of the utility model embodiment removes RS232 serial port circuit or usb circuit, directly from the Transistor-Transistor Logic level that main control chip pin exports, significantly can reduce power consumption.The wired communication interface reserved for main frame is exactly photoelectric communication interface, then do not need the improvement carrying out this step.
As shown in Figure 4, main frame 2 comprises main control chip; Main control chip comprises the Transistor-Transistor Logic level pin of electric field intensity for exporting electrical signal form and magnetic field intensity; Transistor-Transistor Logic level pin is connected with the input end of photoelectric switching circuit 8.
As shown in Figure 3, supporting bracket 12 is also comprised in power frequency electromagnetic field monitor; Be set to the electric field probe 1 of one, magnet field probe 3, main frame 2 and photoelectric switching circuit 8 be fixedly mounted on supporting bracket 12.
Power frequency electromagnetic field monitor in this programme adopts solar powered, as shown in Figure 3, arranges the first solar power supply apparatus 9 in power frequency electromagnetic field monitor, for providing power supply for electric field probe 1, magnet field probe 3, main frame 2 and photoelectric switching circuit 8; First solar power supply apparatus 9 is arranged on supporting bracket 12 by angular adjustment parts.
First solar power supply apparatus 9 is arranged on supporting bracket 12 by angular adjustment parts, make the solar panels 91 of solar power supply apparatus can carry out the adjustment of solar panels 91 angle according to the different sunshine condition in different location, strengthen the ability that solar panels 91 obtain sun power.
For realizing the angular adjustment of solar power supply apparatus, as shown in Figure 3, supporting bracket 12 is arranged the stator 11 for installing the first solar power supply apparatus 9; First solar power supply apparatus 9 comprises solar panels 91 and accumulator 92; Accumulator 92 is arranged on the back of solar panels 91; The top of solar panels 91 is connected with stator 11 by loose-leaf; The both sides of solar panels 91 are connected with supporting bracket 12 respectively by arc support 10.
Wherein, the arcuately bearing of trend of support 10, arc support 10 is arranged at intervals with multiple mounting hole 101; Arc support 10 is arranged on supporting bracket 12 by the one or more bolts that utilize in mounting hole 101.
A pair arc support 10 that solar panels 91 frame increases, in the series installation hole 101 that arc support 10 is arranged, corresponding to the mounted angle of solar panels 91.Distance between two arc supports 10 equals the diameter of support bar.The relevant position of supporting bracket 12 is provided with screw, after rotating solar panels 91 to suitable inclination angle, with long threaded rod through the mounting hole 101 on arc support 10 and the screw on supporting bracket 12, pass from the hole of another side arc support 10, fix with nut.
Adopting the lithium ion battery larger than original battery capacity to carry out accumulation of energy and power to improve solar power supply apparatus further, promoting battery durable ability, increasing under extreme conditions, the continuous power-on time of battery.
The utility model embodiment still provides a kind of power frequency electromagnetic field monitoring assembly device, as shown in Figure 3, comprises data acquisition transmitting device 13 and above-mentioned power frequency electromagnetic field monitor; Data acquisition transmitting device 13 is connected with power frequency electromagnetic field monitor by optical fiber 14.
Electromagnetic interference (EMI) is produced in order to avoid during the 13 pairs of power frequency electromagnetic field monitor monitorings of data acquisition transmitting device, spacing >=1.5 meter between power frequency electromagnetic field monitor and data acquisition transmitting device 13 are set, between power frequency electromagnetic field monitor and data acquisition transmitting device 13, form electric isolution thus.
Above-mentioned data acquisition transmitting device 13 adopts independently power supply to power, therefore in power frequency electromagnetic field monitoring assembly device, the second solar power supply apparatus and/or ac power supply is also comprised, for powering for data acquisition transmitting device 13, preferably data acquisition transmitting device 13 can adopt AC power to power.
Data acquisition transmitting device 13 can adopt wired mode or wireless mode as required when transmitting data to computer equipment.
Find out that the power frequency electromagnetic field monitor of the utility model embodiment and monitoring assembly device are compared with existing power frequency electromagnetic field monitor thus, the solution that the transmission carrying out power frequency electromagnet field data in order to real-time online is taked comprises: one, reduce power consumption; Two, power supply capacity is increased; Three, will monitor with sub data transmission from, independently power.
Wherein, the reduction power consumption measure taked is as follows:
1) remove the maximum wireless communication module of power consumption, significantly reduce the power consumption of monitor, under same condition of power supply, power frequency electromagnet monitor can be worked the longer time.
2) in existing power frequency electromagnet monitor main frame except wireless communication module, generally also be reserved with wired communication interface, be generally RS232 serial ports or USB port, but RS232 serial port circuit or usb circuit, during work, power consumption is larger, in this programme, remove RS232 serial port circuit or usb circuit, directly from the Transistor-Transistor Logic level that main control chip pin exports, significantly can reduce power consumption.The wired communication interface reserved for main frame is exactly photoelectric communication interface, then do not need the improvement carrying out this step.
The increase power supply capacity measure taked is as follows:
Adopt high efficiency solar panels, under same solar panels area and sunshine condition, the electric energy that high-efficiency solar plate produces than original solar panels is more.
Adopt the design of solar panels angle adjustable, enable the sunshine condition that solar panels are different according to different location, regulate solar panels to best angle, strengthen the ability that solar panels obtain sun power.
Adopt the lithium ion battery larger than original battery capacity to carry out accumulation of energy to power, promote battery durable ability, increase under extreme conditions, the continuous power-on time of battery.
To monitor with sub data transmission of taking is as follows from measure:
At monitor main frame place, increase photoelectric switching circuit, after above-mentioned removal RS232 interface or usb circuit, the Transistor-Transistor Logic level that the communication pin of main control chip exports directly is linked into photoelectric switching circuit, and original electric signal is converted to optical signal transmission.Although photoelectric switching circuit adds some power consumptions, its power consumption order of magnitude little of the power consumption of wireless communication module.Be reduction of power consumption generally.The wired communication interface reserved for main frame is exactly photoelectric communication interface, then do not need the improvement carrying out this step.
Increase a data collecting transmitter in this programme, data acquisition transmitting device is communicated by Fiber connection with monitor, obtains the Monitoring Data of monitor, is transferred data to the computing machine of far-end by built-in wireless communication module.
Data acquisition transmitting device and monitor electric isolution design, and mutual spacing is from least 1.5 meters, and data collecting instrument is independently-powered, and external power supply or Large Copacity solar panels can be adopted to power, and do not have an impact to the power frequency electromagnetic field monitoring of monitor.
Through above-mentioned increase power supply capacity, significantly reduce power consumption, Optical Fiber Transmission transformation and the innovative approach such as employing data acquisition transmitting device and monitoring isolation design, power frequency electromagnetic field monitor achieves power supply steady in a long-term under the prerequisite not affecting power frequency electric field measurement accuracy, and the monitor after improvement achieves the long-term on-line monitoring to power frequency electromagnetic field.
It should be noted that, the method that this patent adopts also is effective for the pop one's head in scheme of 1 separation design of monitor main frame 2 given in Fig. 1 and power frequency electric field, innovative approach can be taked equally: 1) power frequency electric field probe 1 adopts solar powered scheme, solar panels 91 angular setting; 2) increase a data collect and transmit module, obtain Monitoring Data from monitor main frame 2 and upload to the computing machine of far-end etc. and power for a long time to power frequency electric field probe 1 on the basis not affecting measurement to reach.
The foregoing is only preferred embodiment of the present utility model, be not limited to the utility model, for a person skilled in the art, the utility model can have various modifications and variations.All within spirit of the present utility model and principle, any amendment done, equivalent replacement, improvement etc., all should be included within protection domain of the present utility model.
Claims (9)
1. a power frequency electromagnetic field monitor, is characterized in that, comprising: electric field probe, magnet field probe, main frame and photoelectric switching circuit;
Described electric field probe, described magnet field probe, described photoelectric switching circuit are connected with described main frame respectively, and are set to one with described main frame;
Described photoelectric switching circuit is used for electric field intensity and the magnetic field intensity that the electric field intensity of electrical signal form that exported by described main frame and magnetic field intensity are converted to light signal form, and gives the data acquisition transmitting device for Monitoring Data collect and transmit by Optical Fiber Transmission.
2. power frequency electromagnetic field monitor according to claim 1, is characterized in that, described main frame comprises main control chip;
Described main control chip comprises the Transistor-Transistor Logic level pin of electric field intensity for exporting electrical signal form and magnetic field intensity; Described Transistor-Transistor Logic level pin is connected with the input end of described photoelectric switching circuit.
3. power frequency electromagnetic field monitor according to claim 2, is characterized in that, also comprise supporting bracket;
Be set to the described electric field probe of one, magnet field probe, main frame and photoelectric switching circuit be fixedly mounted on described supporting bracket.
4. power frequency electromagnetic field monitor according to claim 3, is characterized in that, also comprise: the first solar power supply apparatus, for providing power supply for described electric field probe, magnet field probe, main frame and photoelectric switching circuit;
Described first solar power supply apparatus is arranged on described supporting bracket by angular adjustment parts.
5. power frequency electromagnetic field monitor according to claim 4, is characterized in that,
Described supporting bracket comprises the stator for installing described first solar power supply apparatus;
Described first solar power supply apparatus comprises solar panels and accumulator; Described accumulator is arranged on the back of described solar panels;
The top of described solar panels is connected with described stator by loose-leaf;
The both sides of described solar panels are connected with described supporting bracket respectively by arc support.
6. power frequency electromagnetic field monitor according to claim 5, is characterized in that, along the bearing of trend of described arc support, described arc support is arranged at intervals with multiple mounting hole;
Described arc support is arranged on described supporting bracket by the one or more bolts that utilize in described mounting hole.
7. power frequency electromagnetic field monitoring assembly device, is characterized in that, comprises data acquisition transmitting device and the power frequency electromagnetic field monitor as described in any one of claim 1 to 6;
Described data acquisition transmitting device is connected with described power frequency electromagnetic field monitor by optical fiber.
8. power frequency electromagnetic field monitoring assembly device according to claim 7, is characterized in that, spacing >=1.5 meter between described data acquisition transmitting device and described power frequency electromagnetic field monitor.
9. power frequency electromagnetic field monitoring assembly device according to claim 7, is characterized in that, also comprise the second solar power supply apparatus and/or ac power supply, for powering for described data acquisition transmitting device.
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105842545A (en) * | 2016-05-12 | 2016-08-10 | 北京森馥科技股份有限公司 | Three dimensional omnidirectional electromagnetic field probe and electromagnetic detection device |
| CN106053965A (en) * | 2016-07-08 | 2016-10-26 | 北京航空航天大学 | Method for studying perturbation of electromagnetic field probe through changing type of radiation source |
| CN106443204A (en) * | 2016-08-31 | 2017-02-22 | 深圳供电局有限公司 | Hand-held power frequency electromagnetic radiation monitor |
| CN107102217A (en) * | 2017-04-25 | 2017-08-29 | 广东电网有限责任公司电力科学研究院 | A kind of power frequency electromagnetic field animal experiment system |
| CN107796992A (en) * | 2017-11-27 | 2018-03-13 | 武汉碧海云天科技股份有限公司 | A kind of rf electric field measuring probe and portable intelligent comprehensive electromagnetic field measurement instrument |
| CN107918060A (en) * | 2016-10-09 | 2018-04-17 | 武汉碧海云天科技股份有限公司 | Electromagnetic field on-line monitoring system and its method of work |
| CN110428602A (en) * | 2019-07-24 | 2019-11-08 | 西安工程大学 | A kind of electromagnetic field Phototube Coupling system based on FPGA |
| CN112526233A (en) * | 2020-11-19 | 2021-03-19 | 国网山东省电力公司桓台县供电公司 | Device and method for measuring distortion electric field below alternating-current transmission line |
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2014
- 2014-10-30 CN CN201420642520.8U patent/CN204203365U/en active Active
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105842545A (en) * | 2016-05-12 | 2016-08-10 | 北京森馥科技股份有限公司 | Three dimensional omnidirectional electromagnetic field probe and electromagnetic detection device |
| CN106053965A (en) * | 2016-07-08 | 2016-10-26 | 北京航空航天大学 | Method for studying perturbation of electromagnetic field probe through changing type of radiation source |
| CN106053965B (en) * | 2016-07-08 | 2018-12-04 | 北京航空航天大学 | A method of emf probe micro-disturbance is studied by changing radiation source type |
| CN106443204A (en) * | 2016-08-31 | 2017-02-22 | 深圳供电局有限公司 | Hand-held power frequency electromagnetic radiation monitor |
| CN107918060A (en) * | 2016-10-09 | 2018-04-17 | 武汉碧海云天科技股份有限公司 | Electromagnetic field on-line monitoring system and its method of work |
| CN107918060B (en) * | 2016-10-09 | 2024-03-26 | 武汉碧海云天科技股份有限公司 | Electromagnetic field on-line monitoring system and working method thereof |
| CN107102217A (en) * | 2017-04-25 | 2017-08-29 | 广东电网有限责任公司电力科学研究院 | A kind of power frequency electromagnetic field animal experiment system |
| CN107796992A (en) * | 2017-11-27 | 2018-03-13 | 武汉碧海云天科技股份有限公司 | A kind of rf electric field measuring probe and portable intelligent comprehensive electromagnetic field measurement instrument |
| CN110428602A (en) * | 2019-07-24 | 2019-11-08 | 西安工程大学 | A kind of electromagnetic field Phototube Coupling system based on FPGA |
| CN112526233A (en) * | 2020-11-19 | 2021-03-19 | 国网山东省电力公司桓台县供电公司 | Device and method for measuring distortion electric field below alternating-current transmission line |
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