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CN-122017422-A - Four-wire-system-measured precise lightning protection equipotential testing device and method

CN122017422ACN 122017422 ACN122017422 ACN 122017422ACN-122017422-A

Abstract

The invention relates to the technical field of lightning grounding detection, in particular to a precise lightning equipotential testing device and method for four-wire system measurement, comprising a four-wire system measuring unit, an environment sensing unit, a lightning linkage unit, an authenticity verification unit, a storage unit, a display and interface unit and a main controller, according to the invention, through the three-stage self-checking quantitative scoring of the starting machine and four-wire equipotential test scheme generation and PID accurate control, the closed loop retest mechanism is verified by combining with the authenticity, the false alarm rate is reduced, the lightning stroke survival rate is improved, the reworking times are reduced, and the technical problems of data unreliability and lightning protection failure caused by the lack of health evaluation of the existing device are solved.

Inventors

  • ZHU BO

Assignees

  • 北京宇博宣科技有限公司

Dates

Publication Date
20260512
Application Date
20260302

Claims (10)

  1. 1. A four-wire system measuring accurate lightning protection equipotential testing device, characterized by comprising: The four-wire system measuring unit is electrically connected with the main controller, and comprises a constant current power supply and a voltage measuring circuit, and is used for injecting direct current into a target to be measured through the constant current power supply and collecting potential difference signals through the voltage measuring circuit; The environment sensing unit is electrically connected with the main controller and comprises a digital temperature and humidity sensor, a magnetic field sensor and an atmospheric electric field instrument, and is used for acquiring the environment temperature, the environment humidity and the current temperature through the digital temperature and humidity sensor, acquiring the electromagnetic interference intensity through the magnetic field sensor and acquiring the electric field intensity through the atmospheric electric field instrument; The lightning protection linkage unit is electrically connected with the main controller and is used for executing a four-wire equipotential test scheme to obtain a measurement result; the authenticity verification unit is electrically connected with the main controller and is used for carrying out authenticity judgment on the measurement result to obtain an authenticity judgment result; The storage unit is electrically connected with the main controller and used for storing historical lightning protection test environment data, lightning protection test environment data and electric field intensity; The display and interface unit is electrically connected with the main controller and comprises an RS-485 interface, a first Ethernet interface and a second Ethernet interface, and is used for displaying a measurement result, an authenticity judgment result, an HSI score and lightning protection risk and transmitting data to the upper computer through the RS-485 interface, the first Ethernet interface and the second Ethernet interface; The main controller is used for driving the four-wire system measuring unit, the environment sensing unit, the lightning protection linkage unit, the authenticity verification unit, the storage unit and the display and interface unit.
  2. 2. A method for a precision lightning protection equipotential test device for four-wire measurement according to claim 1, comprising: step S1, performing primary self-check, secondary self-check and tertiary self-check on a four-wire system measured precise lightning protection equipotential testing device to obtain a primary self-check score, a secondary self-check score and a tertiary self-check score, calculating an HIS score according to the primary self-check score, the secondary self-check score and the tertiary self-check score, and outputting the health state of the device according to a calculation result; s2, acquiring lightning protection test environment data and electric field intensity according to the health state of the device; Step S3, generating a four-wire equipotential test scheme according to lightning protection test environment data, and adjusting the intensity of the four-wire equipotential test scheme according to the electric field intensity; step S4, carrying out lightning protection equipotential test on a precise lightning protection equipotential test device measured by a four-wire system through a PID control method according to a four-wire system equipotential test scheme to obtain a measurement result; step S5, carrying out authenticity judgment on the measurement result by an authenticity detection method to obtain an authenticity judgment result, and re-executing the steps S2 to S4 according to the authenticity judgment result; and step S6, obtaining the times of re-executing the steps S2 to S4, obtaining the re-executing times, and checking the processes of re-executing the steps S2 to S4 according to the re-executing times.
  3. 3. The method of a four-wire system measured precision lightning protection equipotential testing device of claim 2 wherein the first level self-test of step S1 comprises: Obtaining a noise RMS actual measurement value Z, calculating a primary self-checking score A according to the noise RMS actual measurement value Z, and setting A=100- (Z/1 mu V) multiplied by 100, wherein when the primary quality checking score A is less than 60 time, the power supply of the four-wire system measured precise lightning protection equipotential testing device is turned off, and a worker is informed of maintaining the device; The second-level self-checking in the step S1 includes: Obtaining a current temperature T, inquiring a factory temperature resistance calibration value of the device according to the current temperature to obtain a first temperature T1, a second temperature T2, a first resistance calibration value Rt1 and a second resistance calibration value Rt2, calculating a resistance theoretical value Rth according to the first temperature T1, the second temperature T2, the first resistance calibration value Rt1 and the second resistance calibration value Rt2, setting Rth=R1+ (R2-R1) x (T-T1)/(T2-T1), calculating a resistance deviation Rp according to the resistance theoretical value Rth and a resistance actual value Rm, setting Rp= |Rm-Rth|/Rth multiplied by 100%, calculating a second-level self-test score B according to the resistance deviation Rp, and setting B=100- (Rp/0.02 percent) multiplied by 100, wherein when the second-level self-test score B is smaller than 60, turning off a power supply of a four-wire system measured precision lightning protection equipotential testing device, and notifying a worker to maintain the device; the three-stage self-test in the step S1 comprises the following steps: the method comprises the steps of measuring a standard resistor built in a four-wire system measured precision lightning protection equipotential test device for 24 times within one minute to obtain a standard resistor measurement data set Rb= { R1, R2, & gt, R24}, calculating a maximum drift amount S, setting S=max (|Ri-R1|)/R1X100%, i as a measurement sequence, calculating a three-level self-checking score C according to the maximum drift amount S, and setting C=100- (S/0.02%). Times.100, wherein when the three-level self-checking score C is smaller than 60 minutes, turning off a power supply of the four-wire system measured precision lightning protection equipotential test device, and notifying a worker to maintain the device; In the step S1, the calculation of the HIS score according to the first-level self-check score, the second-level self-check score and the third-level self-check score, and the output of the health status of the device according to the calculation result, include: calculating an HIS score K according to a first-level self-checking score A, a second-level self-checking score B, a third-level self-checking score C, HIS, a first weight coefficient alpha 1, an HIS second weight coefficient alpha 2 and an HIS third weight coefficient, setting K=alpha 1 xA+alpha 2 xB+alpha 3 xC, comparing the HIS score with a preset first score K1 and a preset second score K2, judging the health score according to the comparison result, and outputting the health state of the device according to the judgment result, wherein: When K is less than or equal to K1, judging that the health score is low, and outputting the equipment fault as the health state of the device; when K1 is less than or equal to K2, judging that the health scoring condition is medium in scoring, and outputting the poor equipment health as the health state of the device; And when K > K2, judging that the health scoring condition is high, and outputting the equipment health as the device health state.
  4. 4. The method of four-wire system measurement precision lightning protection equipotential testing device according to claim 3, wherein said step S2 is performed to collect lightning protection test environment data and electric field intensity according to the health status of the device, wherein: When the health state of the device is that the equipment is healthy, collecting lightning protection test environment data and electric field intensity; when the health state of the device is poor in equipment health, collecting lightning protection test environment data and electric field intensity; when the health state of the device is equipment failure, the lightning protection test environment data and the electric field intensity are not collected.
  5. 5. The method of a four-wire system measured precision lightning protection equipotential test device according to claim 2, wherein the generating the four-wire system equipotential test solution according to the lightning protection test environment data in step S3 includes: Inputting the lightning protection test environment data into a preset lightning protection scheme model, obtaining a four-wire system equipotential test scheme output by the preset lightning protection scheme model, and constructing the preset lightning protection scheme model by a lightning protection scheme model construction method in step S3, wherein the lightning protection scheme model construction method comprises the following steps: Carrying out four-wire equipotential test scheme processing on historical lightning protection test environment data, determining equipotential test demand characteristics in the lightning protection test environment data, and carrying out four-wire equipotential test scheme model learning on the extracted equipotential test demand characteristics to form a lightning protection scheme model with four-wire equipotential test scheme output; The four-wire equipotential test scheme characteristic extraction is to extract a set of four-wire equipotential test scheme model calculation on multi-dimensional matrix data of lightning protection test environment data which are analyzed by a grounding system and optimized by test parameters, and comprises the steps of extracting grounding system characteristics, test point layout characteristics and test parameter configuration characteristics in the four-wire equipotential test scheme characteristic and extracting equipotential test quality information in the four-wire equipotential test scheme characteristic by an output set of a plurality of lines formed by model layers in a plurality of processing stages; The four-wire equipotential test scheme comprises a first wire four-wire current electrode layout layer, a second wire test electrode pitch optimization layer, a third wire multipoint test layout layer, a third wire test parameter configuration layer, a fourth wire test parameter configuration layer, a test frequency configuration layer, a second wire test parameter configuration layer, a third wire test parameter configuration layer and an environment compensation layer, wherein the extraction of the grounding system characteristics in the four-wire equipotential test scheme characteristics is realized by an output set of three wires formed by the grounding system analysis layer, the first wire grounding network topology analysis layer from left to right is added with a grounding resistance calculation layer, the second wire equipotential connection analysis layer is added with a conducting resistance analysis layer and the third wire soil resistivity analysis layer is added with a corrosion state evaluation layer; The four-wire equipotential test scheme output is realized by a four-wire equipotential test scheme output module, the contribution degree of each input characteristic is dynamically adjusted through a learnable four-wire equipotential test scheme generation network, then four-wire equipotential test scheme generation calculation is carried out, unified four-wire equipotential test scheme output is formed, the four-wire equipotential test quality information is extracted through a four-wire equipotential test quality assessment mechanism, and the number of parallel calculation lines of the mechanism is larger than that of model layers extracted by the characteristics of each single four-wire equipotential test scheme.
  6. 6. The method of a four-wire system measurement precision lightning protection equipotential testing device according to claim 2, wherein the step S3 of performing intensity adjustment on the four-wire system equipotential testing scheme according to the electric field intensity comprises: Comparing the electric field intensity Q with the first electric field intensity Q1, the second electric field intensity Q2 and the third electric field intensity Q3, judging lightning protection risks according to comparison results, and carrying out intensity adjustment on a four-wire system equipotential test scheme according to judgment results, wherein: When Q is less than or equal to Q1, judging that the lightning protection risk is low risk, and not adjusting the intensity of the four-wire equipotential test scheme; When Q1 is less than or equal to Q2, judging that the lightning protection risk is middle risk, adjusting the intensity of the four-wire equipotential test scheme, adjusting the integral time of the four-wire equipotential test scheme to 0.5 second, pushing the lightning approaching prompt to staff, and accelerating the measurement; when Q2 is less than or equal to Q3, judging that the lightning protection risk is high risk, adjusting the intensity of the four-wire equipotential test scheme, and adjusting the four-wire equipotential test scheme to suspend lightning protection measurement and continuously monitoring the electric field intensity; When Q is more than Q3, the lightning protection risk is judged to be extremely high, the intensity of the four-wire equipotential test scheme is adjusted, the four-wire equipotential test scheme is adjusted to be that the constant current power supply is disconnected, and the electric field intensity is continuously monitored by the battery power supply.
  7. 7. The method of a four-wire system measurement precision lightning protection equipotential test device according to claim 2, wherein the step S5 performs an authenticity judgment on the measurement result by an authenticity detection method to obtain an authenticity judgment result, and re-performs steps S2 to S4 according to the authenticity judgment result, and includes: step S51, calculating a rationality score according to the measurement result and the history median; step S52, continuously sampling the same target to be detected for 15 times to obtain a sampling data set Y { Y1, Y2, & gt, Y14, Y15}, and calculating a relative standard deviation RSD after eliminating three maximum values and three minimum values in the sampling data set to obtain a repeatability score; Step S53, calculating an authenticity score according to the repeatability score and the rationality score, comparing the authenticity score with a preset authenticity score, judging the authenticity of the measurement result according to the comparison result to obtain an authenticity judgment result, and re-executing steps S2 to S4 according to the authenticity judgment result, wherein the step S comprises the following steps: calculating an authenticity score P according to the rationality score D1, the repeatability score D2, the first authenticity coefficient β1 and the second authenticity coefficient β2, setting p=β1xd1+β2xd2, and comparing the authenticity score P with a preset authenticity score P0, wherein: when P is less than or equal to P0, judging the authenticity is unrealistic, outputting the unrealistic as an authenticity judging result, re-executing the steps S2 to S4, revising the four-wire system equipotential test scheme, increasing the integration time to 1.5 times, and reducing the current level by 20%; When P > P0, judging the authenticity as the authenticity, outputting the authenticity as an authenticity judgment result, not re-executing the steps S2 to S4, and pushing the measurement result to the staff.
  8. 8. The method of a four-wire system measured precision lightning protection equipotential test device of claim 7 wherein step S51, calculating a rationality score based on the measurement result and a historical median value, comprises: According to a measurement result Rmeas and a target to be measured, a relative deviation delta is calculated by planting Rhist in the history, delta= | Remas-Rhist | Rhist is set, a combination score D1 is calculated according to the relative deviation, D1=100- (delta ≡0.5) ×100 is set, wherein 100 is a full score of 100, when delta=0, D1=100, 0.5 is that the deviation reaches 50% of the median value of the history and is 0 score, and the rest score conditions are linearly decreased.
  9. 9. The method of a four-wire system measurement precision lightning protection equipotential testing device according to claim 7, wherein step S52, sampling the same target to be tested 15 times continuously to obtain a sampled data set Y { Y1, Y2,..: Three maxima and three minima in the sampled dataset are culled to obtain a post-culled sampled dataset Yt { y4, y5,..y 11, y12}, a sampled mean ymean is calculated from the post-culled sampled dataset Yt { y4, y5,..y 11, y12}, ymean = (y4+y5+y6+y7+y8+y9+y10+y11+y12)/9 is set, a sampled standard deviation ystd is calculated from the post-culled sampled dataset Yt { y4, y5,., y11, y12} and the sampled mean ymean, ,RSD=ystd/ymean×100%。
  10. 10. The method of a four-wire system measurement precision lightning protection equipotential testing device according to claim 2, wherein the step S6 obtains the number of times of re-executing the steps S2 to S4, obtains the number of re-executing times, and checks the process of re-executing the steps S2 to S4 according to the number of re-executing times, and includes: Comparing the re-execution times L with the preset re-execution times L0, judging the measurement failure condition according to the comparison result, and checking the re-execution processes from the step S2 to the step S4 according to the judgment result, wherein: when L is less than or equal to L0, judging that the measurement failure condition is not serious, and not checking the processes of the steps S2 to S4; when L > L0, judging that the measurement failure condition is serious, and checking the process of re-executing the steps S2 to S4, wherein the checking comprises stopping re-executing the steps S2 to S4, pushing the measurement result to a worker, and manually judging by the worker.

Description

Four-wire-system-measured precise lightning protection equipotential testing device and method Technical Field The invention relates to the technical field of lightning protection grounding detection, in particular to a four-wire system measurement precise lightning protection equipotential test device and method. Background The existing lightning protection equipotential test device has three contradictions that a strong lightning protection circuit inevitably introduces microampere-level leakage current, so that milliohm measurement errors reach +/-2% - +/-5%, temperature, humidity and EMI are lack of real-time perception in a complex environment, repeatability is inferior to 3%, a power-on self-test is only used for static snapshot, data reliability cannot be quantized, and false alarm rate is more than 30%. Chinese patent publication No. CN119738614a discloses an equipotential connection measuring method and system based on accurate low resistance. The method comprises the steps of completing initial configuration of a measurement channel according to sampling parameters of a high-precision ADC chip and arrangement of a temperature sensor to obtain a dynamic compensation parameter database, connecting 20 channels by an elastic compression structure to obtain stress compensation data, obtaining a dynamic calibration compensation coefficient by combining temperature-resistance and stress characteristic analysis through time division multiplexing calibration by using a standard resistance network, carrying out four-wire system measurement and 1kHz sampling on the coefficient to obtain original data, obtaining a resistance value through compensation processing and interference recognition, carrying out association analysis to obtain a state parameter, and finally evaluating stability to obtain an optimized compensation parameter. Therefore, the scheme still has the problems that the probability of false data generated by the operation with diseases is high, the lightning protection is invalid, and the rework rate is high because the self health state can not be rapidly and quantitatively estimated during starting up. Disclosure of Invention Therefore, the invention provides a four-wire system measurement precise lightning protection equipotential test device and method, which are used for solving the problems that the probability of false data generation, lightning protection failure and rework rate are high due to the fact that the state of health of the device cannot be rapidly and quantitatively estimated when the device is started in the prior art. In order to achieve the above object, in one aspect, the present invention provides a precision lightning protection equipotential test device for four-wire measurement, including: The four-wire system measuring unit is electrically connected with the main controller, and comprises a constant current power supply and a voltage measuring circuit, and is used for injecting direct current into a target to be measured through the constant current power supply and collecting potential difference signals through the voltage measuring circuit; The environment sensing unit is electrically connected with the main controller and comprises a digital temperature and humidity sensor, a magnetic field sensor and an atmospheric electric field instrument, and is used for acquiring the environment temperature, the environment humidity and the current temperature through the digital temperature and humidity sensor, acquiring the electromagnetic interference intensity through the magnetic field sensor and acquiring the electric field intensity through the atmospheric electric field instrument; The lightning protection linkage unit is electrically connected with the main controller and is used for executing a four-wire equipotential test scheme to obtain a measurement result; the authenticity verification unit is electrically connected with the main controller and is used for carrying out authenticity judgment on the measurement result to obtain an authenticity judgment result; The storage unit is electrically connected with the main controller and used for storing historical lightning protection test environment data, lightning protection test environment data and electric field intensity; The display and interface unit is electrically connected with the main controller and comprises an RS-485 interface, a first Ethernet interface and a second Ethernet interface, and is used for displaying a measurement result, an authenticity judgment result, an HSI score and lightning protection risk and transmitting data to the upper computer through the RS-485 interface, the first Ethernet interface and the second Ethernet interface; The main controller is used for driving the four-wire system measuring unit, the environment sensing unit, the lightning protection linkage unit, the authenticity verification unit, the storage unit and the display and interface unit. On the other hand, the inv