CN116106632A - Online monitoring terminal and method for grounding resistance - Google Patents

Abstract

The invention discloses an online monitoring terminal and a monitoring method for a grounding resistor, comprising a shell, wherein an electric power supply, communication equipment, detection equipment, data storage equipment and a main control module are arranged in the shell, switching discs are arranged on the left side and the right side of the shell, a circuit switching mechanism is arranged above a device table, each switching disc is rotationally connected with the circuit switching mechanism, the circuit switching mechanism is matched with the detection equipment for use, ventilation mechanisms are arranged on the front part and the rear part of the shell, auxiliary boxes are arranged on the left side and the right side of the shell, a plurality of auxiliary measurement points are added, the service condition of the grounding resistor can be known more accurately through the measurement of a plurality of groups of data, the grounding resistor can be detected through the residual points when a part of auxiliary points have a problem to be maintained, accidents caused by the condition that the grounding resistor cannot be determined during the maintenance are avoided, the ventilation and heat dissipation functions of workers are increased.

Description

Online monitoring terminal and method for grounding resistance

Technical Field

The invention belongs to the technical field of ground resistance monitoring, and relates to an online monitoring terminal and a monitoring method of a ground resistance.

Background

The grounding resistor is a resistor which is encountered by current flowing into the ground from the grounding device and flowing to another grounding body or diffusing to a distance through the ground, the grounding resistor value reflects the good degree of contact between the electrical device and the ground and reflects the scale of the grounding network, in order to ensure normal use of the grounding resistor, the grounding resistor needs to be measured regularly, the grounding resistor is ensured to be within a qualified standard range, the current grounding resistor monitoring device is difficult to realize the purpose of real-time online monitoring of the grounding resistor, the ground down-lead connection condition is inconvenient for workers to know in real time, the grounding resistor can only be detected at fixed points, the use condition of the grounding resistor cannot be accurately determined through data detected at a single fixed point, and the existing detection device lacks necessary protection and is inconvenient to maintain.

Disclosure of Invention

Aiming at the problems, in order to overcome the defects of the prior art, the invention provides an on-line monitoring terminal and a monitoring method of a grounding resistor, and the invention aims at: the device has the advantages that the auxiliary measurement points are added, the service condition of the grounding resistor can be accurately known through measurement of multiple groups of data, through the design of multiple points, when a part of auxiliary points are in a problem and need to be maintained, the grounding resistor can be detected through the residual points, accidents caused by the fact that the grounding resistor cannot be determined during maintenance are avoided, the device is maintained or replaced by workers conveniently, and the ventilation and heat dissipation functions are increased.

In order to achieve the above purpose, the technical scheme of the on-line monitoring terminal for the grounding resistance provided by the invention is as follows: the invention comprises a shell, wherein an electric energy power supply, communication equipment, detection equipment, data storage equipment and a main control module are arranged in the shell, the detection equipment is used for detecting ground resistance and collecting data, the data storage equipment is used for data storage, the main control module is used for calculating and analyzing data, the communication equipment is used for realizing remote transmission of data, the electric energy power supply is used for providing electric energy for the equipment, a lifting device table is arranged in the shell, a supporting table is arranged above the device table, a switching disc is arranged on the left side and the right side of the shell, a line switching mechanism is arranged above the device table, each switching disc is rotationally connected with the line switching mechanism, the line switching mechanism is matched with the detection equipment for use, a ventilation mechanism is fixedly connected with the front side and the rear side of the shell, and a plurality of auxiliary boxes are arranged on the left side and the right side of the shell.

Preferably, the upper portion of every auxiliary tank is all fixedly connected with pneumatic cylinder, every the output shaft of pneumatic cylinder is all fixedly connected with a supporting shoe that can slide from top to bottom, every the middle part of supporting shoe downside all is fixed with the earth bar, every the upper portion of earth bar all is held there is crocodile pincers, every the periphery of supporting shoe downside all is fixed with a plurality of ground posts.

Preferably, the circuit switching mechanism comprises a double-shaft motor fixedly mounted on the device table, the output shafts of the double-shaft motor are respectively fixed with a rotating column, each rotating column is respectively fixed with a switching block, each switching block is respectively fixed with a hydraulic cylinder, and the output ends of the hydraulic cylinders are respectively fixed with a wiring block.

Preferably, each junction block is fixedly connected with a first grounding wire, each first grounding wire is connected to the detection equipment, each switching disc is provided with a plurality of junction grooves matched with the junction blocks, each junction groove is connected with a second grounding wire, and the other end of each second grounding wire is connected to crocodile pliers in the corresponding auxiliary box.

Preferably, a plurality of positioning blocks are arranged on the upper side of the device table, the device table is fixed on the positioning blocks, and the detection equipment is arranged on the upper side surface of the supporting table.

Preferably, the ventilation mechanism comprises a protecting shell, a shielding frame, a fan and a filter plate, wherein the protecting shell is of a rectangular shell structure which is communicated from front to back, ventilation openings are formed in the front side wall and the rear side wall of the shell, the shielding frame is fixed at the ventilation openings, the protecting shell is fixed on the shielding frame, the fan is fixed on one side face of the shielding frame, facing the protecting shell, of the protecting shell, and the filter plate fixed on the protecting shell is arranged on one side of the fan, facing away from the shielding frame.

Preferably, the bottom of casing fixedly connected with a plurality of dampers, the below of casing is equipped with a bottom plate, every the lower part of damper all with bottom plate fixed connection, the upper portion sliding connection of bottom plate has a plurality of spacing posts, the upper portion of casing is equipped with a buckle that can reciprocate.

Preferably, the bottom fixedly connected with servo motor of casing, servo motor's output shaft fixedly connected with first helical gear, first helical gear meshing has the second helical gear of rotation on the casing bottom of installing, the bottom rotation of casing is connected with a plurality of threaded rods, every the lower part fixedly connected with two runners of threaded rod, the runner on second helical gear and the plurality of threaded rods is connected in order through the belt, every equal threaded connection of threaded rod has a siphunculus, the siphunculus is fixed on the device platform, and every the top of siphunculus all contradicts with the buckle.

The on-line monitoring terminal for the grounding resistance has the following beneficial effects compared with the prior art: according to the invention, the grounding resistance can be measured at a plurality of points through the auxiliary box, the circuit switching mechanism and the switching disc, when part of the auxiliary box has problems, the resistance data detection can be continuously carried out through other auxiliary boxes, the damage and suspension of the terminal caused by the problems of the part of the auxiliary box are avoided, the maintenance and the replacement of equipment in the terminal are facilitated, the ventilation and the heat dissipation are facilitated, and the influence of the overhigh temperature of the equipment on the data monitoring is avoided.

The on-line detection method of the grounding resistor comprises the on-line detection side terminal of the grounding resistor, and comprises the following steps:

s1, installing a shell and an auxiliary box at a fixed point position, wherein the auxiliary boxes are divided into two groups, and the two groups of auxiliary boxes are respectively installed at 20m and 40m away from the shell;

step S2, an on-line monitoring terminal of the grounding resistor is connected to an upper computer through a communication network provided by communication equipment;

step S3, setting a ground resistance monitoring period of the online detection terminal through the upper computer, and periodically sending a monitoring instruction to the online detection terminal by the upper computer according to the set monitoring period;

step S4, the on-line monitoring terminal controls the double-shaft motor and the pneumatic cylinder 12 to start according to a preset operation interval according to a received instruction of the upper computer so as to drive the wiring blocks to be sequentially inserted into the wiring grooves on the conversion plate, so as to collect the resistance values of the grounding resistors corresponding to the auxiliary boxes;

s5, the detection equipment collects the resistance values detected in the step S4, a plurality of groups of resistance data are transmitted to the main control module, calculation and analysis are carried out through the main control module, the data are stored in the data storage equipment, and meanwhile the data calculated and analyzed by the main control module are uploaded to the upper computer through the communication equipment;

s6, the upper computer processes the received data to obtain two average resistance values corresponding to 20m and 40m respectively, and then the upper computer compares the calculated average resistance value with a standard resistance value to judge whether the grounding resistance of the position of the auxiliary box is abnormal;

and step S7, if the monitoring terminal is normal, repeating the steps S4-S6, and periodically detecting and maintaining the monitoring terminal by personnel, and if the monitoring terminal is abnormal, sending out alarm information by the upper computer so as to facilitate the subsequent operation of the personnel.

The on-line monitoring method of the grounding resistance for the body has the following beneficial effects compared with the prior art: the multi-point data detection can be realized by the monitoring method, the service condition of the grounding resistor can be more accurately known by analyzing and comparing a plurality of groups of data, and real-time transmission can be performed on real-time problems, so that the data can be monitored at any time.

Drawings

FIG. 1 is a schematic perspective view of the structure of the present invention;

FIG. 2 is a schematic diagram of a circuit switching mechanism according to the present invention;

FIG. 3 is a schematic view of the position of a rotating column according to the present invention;

FIG. 4 is a schematic view of a fan position according to the present invention;

FIG. 5 is a schematic view of the wheel position of the present invention;

fig. 6 is a schematic diagram of the crocodile clamp device of the present invention.

Reference numerals: 1-shell, 2-detection equipment, 3-communication equipment, 4-data storage equipment, 5-electric power supply, 6-device table, 7-supporting table, 8-conversion disk, 9-line switching mechanism, 10-ventilation mechanism, 11-auxiliary box, 12-pneumatic cylinder, 13-supporting block, 14-grounding rod, 15-crocodile clamp, 16-ground column, 17-double-shaft motor, 18-rotating column, 19-switching block, 20-hydraulic cylinder, 21-wiring block, 22-wiring slot, 23-first grounding wire, 24-second grounding wire, 25-positioning block, 26-protective shell, 27-shielding frame, 28-fan, 29-filter plate, 30-damper, 31-base plate, 32-limiting column, 33-buckle plate, 34-servo motor, 35-first helical gear, 36-second helical gear, 37-rotary wheel, 38-threaded rod, 39-belt, 40-through pipe and 41-main control module.

Detailed Description

The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

The following describes embodiments of the present invention in further detail with reference to FIGS. 1-6.

The invention discloses an on-line monitoring terminal of ground resistance, as shown in fig. 1-2, the on-line monitoring terminal comprises a shell 1, an electric energy power supply 5, a communication device 3, a detection device 2, a data storage device 4 and a main control module 41 are arranged in the shell 1, the detection device 2 completes detection and data acquisition of the ground resistance, the data storage device 4 is used for data storage, the main control module 41 is used for calculation and analysis of data, the communication device 3 is used for realizing remote transmission of the data, the electric energy power supply 5 is used for supplying electric energy to the devices, a lifting device table 6 is arranged in the shell 1, a supporting table 7 is arranged above the device table 6, a switching disc 8 is arranged on the left side and the right side of the shell 1, a line switching mechanism 9 is arranged above the device table 6, each switching disc 8 is rotationally connected with the line switching mechanism 9 and is matched with the detection device 2, a ventilation mechanism 10 is fixedly connected with the front side and the rear side of the shell 1, and a plurality of auxiliary boxes 11 are arranged on the left side and the right side of the shell 1.

In this embodiment, as shown in fig. 1 and 6, the upper portion of each auxiliary box 11 is fixedly connected with a pneumatic cylinder 12, the output shaft of each pneumatic cylinder 12 is fixedly connected with a supporting block 13 that can slide up and down, the middle portion of the lower side surface of each supporting block 13 is fixedly provided with a grounding rod 14, the upper portion of each grounding rod 14 is clamped with crocodile pliers 15, the periphery of the lower side surface of each supporting block 13 is fixedly provided with a plurality of ground posts 16, the bottom of each auxiliary box 11 is provided with a plurality of slot holes, and the ground posts 16 and the grounding rods 14 can move downwards conveniently.

In this embodiment, as shown in fig. 2-3, the circuit switching mechanism 9 includes a dual-shaft motor 17 fixedly mounted on the device table 6, the output shaft of the dual-shaft motor 17 is fixed with a rotation column 18, the central axis of the rotation column 18 coincides with the center of the circle of the conversion disc 8, each rotation column 18 is fixed with a transfer block 19, each transfer block 19 is fixed with a hydraulic cylinder 20, and the output end of each hydraulic cylinder 20 is fixed with a connection block 21.

In this embodiment, as shown in fig. 2-3 and fig. 6, each junction block 21 is fixedly connected with a first grounding wire 23, each first grounding wire 23 is connected to the detecting device 2, each switching disc 8 is provided with a plurality of junction grooves 22 adapted to the junction block 21, the junction grooves 22 are annularly arranged on the periphery of the switching disc (8) with the center of the switching disc 8 as the center, the distance between the junction grooves 22 and the center of the switching disc 8 is the same as the vertical distance between the axis of the rotating column 18 and the axis of the junction block 21, a second grounding wire 24 is connected to each junction groove 22, and the other end of each second grounding wire 24 is connected to the crocodile pliers 15 in the corresponding auxiliary box 11.

In this embodiment, as shown in fig. 2-3, a plurality of positioning blocks 25 are disposed on the upper side of the device table 6, the device table 6 is fixed on the positioning blocks 25, and the detecting apparatus 2 is mounted on the upper side of the supporting table 7.

In this embodiment, as shown in fig. 2 and fig. 4, the ventilation mechanism 10 includes a protecting case 26, a shielding frame 27, a fan 28 and a filter plate 29, the protecting case 26 is a rectangular case structure that is penetrated from front to back, ventilation openings are formed in front and rear side walls of the case 1, the shielding frame 27 is fixed at the ventilation openings, the protecting case 26 is fixed on the shielding frame 27, the fan 28 is fixed on a side surface of the shielding frame 27 facing the protecting case 26, a filter plate 29 fixed on the protecting case 26 is arranged on a side of the fan 28 facing away from the shielding frame 27, and the filter plate 29 can prevent sundries from entering the terminal.

In this embodiment, as shown in fig. 1-2, the bottom of the housing 1 is fixedly connected with a plurality of dampers 30, a bottom plate 31 is disposed below the housing 1, each damper 30 is fixedly connected with the bottom plate 31 of the goldfish, when the terminal receives impact, the damper 30 can play a role in buffering and damping, the upper portion of the bottom plate 31 is slidably connected with a plurality of limiting columns 32, the limiting columns 32 can be slidably embedded in the ground to fix the terminal, a buckle 33 capable of moving up and down is disposed on the upper portion of the housing 1, the shape of the buckle 33 is the same as the shape of a groove formed in the top of the housing 1, the buckle 33 is directly placed above the through pipe 40, and because of the fit with the housing 1, the buckle 33 is difficult to be taken out from the outside, and can be lifted and removed by lifting the buckle 33 through the internal through pipe 40.

In this embodiment, as shown in fig. 2 and fig. 5, a servo motor 34 is fixedly connected to the bottom of the casing 1, a first bevel gear 35 is fixedly connected to an output shaft of the servo motor 34, a second bevel gear 36 rotatably mounted on the bottom of the casing 1 is meshed with the first bevel gear 35, a plurality of threaded rods 38 are rotatably connected to the bottom of the casing 1, two rotating wheels 37 are fixedly connected to the lower portion of each threaded rod 38, the second bevel gear 36 and the rotating wheels 37 on the plurality of threaded rods 38 are sequentially connected through a belt 39, a through pipe 40 is screwed to each threaded rod 38, the through pipe 40 is fixed on the device table 6, and the top of each through pipe 40 is in contact with the pinch plate 33.

The installation and working processes of the on-line monitoring terminal of the grounding resistance provided by the invention are as follows:

A. the casing 1 is fixed by putting the casing 1 into the fixed point position and utilizing the limiting columns 32 to go deep underground, then the auxiliary boxes 11 are respectively placed at the positions to be detected, the supporting blocks 13, the grounding bars 14 and the grounding columns 16 are downwards moved to go deep into the ground through the pneumatic cylinders 12, and normally go deep into 40cm, the auxiliary boxes 11 are fixed, the grounding bars 14 reach the detection depth, the auxiliary boxes 11 are divided into two groups, and the two groups of auxiliary boxes 11 are respectively fixed through the grounding columns 16 at the positions of 20m and 40m along the grounding body radiation direction;

B. the detection device 2 is connected with the grounding body through the grounding wire, the corresponding rotating column 18 is driven to rotate through the double-shaft motor 17, the corresponding rotating column 18 drives the corresponding switching block 19 to rotate, the corresponding switching block 19 drives the corresponding hydraulic cylinder 20 to rotate, the corresponding hydraulic cylinder 20 pushes the wiring block 21 to be matched with the corresponding wiring groove 22, at the moment, the corresponding first grounding wire 23 is connected with the corresponding second grounding wire 24, the detection device 2 is respectively connected with each auxiliary box 11 of the 20m auxiliary boxes 11 and the 40m auxiliary boxes 11 through the first grounding wire 23 and the second grounding wire 24, the detection device 2 finishes the measurement of the grounding resistance, the data detected by the two auxiliary boxes 11 can be error, the auxiliary boxes 11 can be measured through the connection of the wiring block 21 and the different wiring grooves 22, so that whether the grounding resistance is qualified or not is detected, if the auxiliary box 11 data is abnormal, the data storage device 4 can record and store the data and terminal state information, and then the data are remotely transmitted to the outside through the communication device 3;

C. when the monitoring terminal is determined to be abnormal through the transmission information, staff can transmit signals to the communication equipment 3, the communication equipment 3 transmits signals to the controller, the controller controls the servo motor 34 to operate, the servo motor 34 operates to drive the first bevel gear 35 to rotate, the first bevel gear 35 drives the second bevel gear 36 to rotate, the second bevel gear 36 drives the rotating wheel 37 to rotate, the rotating wheel 37 drives the corresponding belt 39 to rotate, the corresponding belt 39 drives the corresponding threaded rod 38 to rotate, all the threaded rods 38 and the belt 39 rotate in the same way, each threaded rod 38 pushes the corresponding through pipe 40 to ascend, the through pipe 40 drives the device table 6 to ascend, the pinch plate 33 is ejected out through the through pipe 40, the pinch plate 33 is taken down, maintenance or replacement of equipment inside the terminal is facilitated, and the auxiliary box 11 with abnormal data is checked.

An online detection method of a grounding resistor comprises the online detection terminal of the grounding resistor, and comprises the following steps:

step S1, installing the shell 1 and the auxiliary box 11 at a fixed point position, wherein the auxiliary boxes 11 are divided into two groups, and the two groups of the auxiliary boxes 11 are respectively installed at 20m and 40m away from the shell 1;

step S2, an on-line monitoring terminal of the grounding resistor is connected to an upper computer through a communication network provided by the communication equipment 3;

step S3, setting a ground resistance monitoring period of the online detection terminal through the upper computer, and periodically sending a monitoring instruction to the online detection terminal by the upper computer according to the set monitoring period;

step S4, the on-line monitoring terminal controls the double-shaft motor 17 and the pneumatic cylinder 12 to start according to a preset operation interval according to a received instruction of the upper computer so as to drive the wiring blocks 21 to be sequentially inserted into the wiring grooves 22 on the conversion disc 8, so as to collect the resistance values of the grounding resistors corresponding to the auxiliary boxes 11;

step S5, the detection equipment 2 collects the resistance value detected in the step S4, a plurality of groups of resistance data are transmitted to the main control module 41, calculation and analysis are carried out through the main control module 41, the data are stored in the data storage equipment 4, and meanwhile, the data calculated and analyzed by the main control module 41 are uploaded to an upper computer through the communication equipment 3;

step S6, the upper computer processes the received data to obtain two average resistance values corresponding to 20m and 40m respectively, and then the upper computer compares the calculated average resistance value with a standard resistance value to judge whether the grounding resistance of the position of the auxiliary box 11 is abnormal;

and step S7, if the monitoring terminal is normal, repeating the steps S4-S6, and periodically detecting and maintaining the monitoring terminal by personnel, and if the monitoring terminal is abnormal, sending out alarm information by the upper computer so as to facilitate the subsequent operation of the personnel.

Although the present invention has been described with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described, or equivalents may be substituted for elements thereof, and any modifications, equivalents, improvements and changes may be made without departing from the spirit and principles of the present invention.

Claims (9)

1. The utility model provides an on-line monitoring terminal of earth resistance, includes casing, its characterized in that: the utility model discloses a device for detecting the ground resistance of the shell, including casing, the inside of casing has electric energy power supply, communications facilities, check out test set, data storage equipment, main control module, and check out test set accomplishes ground resistance's detection and data acquisition, and data storage equipment is used for data storage, and main control module is used for calculation and the analysis of data, and communications facilities is used for realizing the remote transmission of data, and electric energy power supply is used for providing the electric energy for above-mentioned equipment, the inside of casing is equipped with a device platform that can go up and down, the top of device platform is equipped with a supporting bench, the left and right sides of casing all is equipped with a switching board, the top of device platform is equipped with a circuit switching mechanism, every switching board all rotates with circuit switching mechanism to be connected, circuit switching mechanism uses with check out test set cooperation, the equal fixedly connected with ventilation mechanism of both sides around the casing, the left and right sides of casing all is equipped with a plurality of auxiliary boxes.

2. The on-line monitoring terminal of ground resistance of claim 1, wherein: every the upper portion of auxiliary box all fixedly connected with pneumatic cylinder, every the output shaft of pneumatic cylinder all fixedly connected with a gliding supporting shoe from top to bottom, every the middle part of supporting shoe downside all is fixed with the earth bar, every the upper portion of earth bar all clamps has crocodile pincers, every the periphery of supporting shoe downside all is fixed with a plurality of ground posts.

3. The on-line monitoring terminal of ground resistance of claim 1, wherein: the circuit switching mechanism comprises a double-shaft motor fixedly mounted on the device table, the output shafts of the double-shaft motor are respectively fixed with a rotating column, each rotating column is respectively fixed with a switching block, each switching block is respectively fixed with a hydraulic cylinder, and the output ends of the hydraulic cylinders are respectively fixed with a wiring block.

4. An on-line monitoring terminal for ground resistance according to claim 3, wherein: every the equal fixedly connected with of junction block is first earth connection, every first earth connection all is connected to check out test set, every offer a plurality of wiring grooves with the junction block adaptation on the change over tray, every the wiring groove department all connects out a second earth connection, every the other end of second earth connection all is connected on the crocodile pincers in the auxiliary box that corresponds.

5. The on-line monitoring terminal of ground resistance of claim 1, wherein: the upper side of the device table is provided with a plurality of positioning blocks, the device table is fixed on the positioning blocks, and the detection equipment is arranged on the upper side surface of the supporting table.

6. The on-line monitoring terminal of ground resistance of claim 1, wherein: the ventilation mechanism comprises a protective shell, a shielding frame, a fan and a filter plate, wherein the protective shell is of a rectangular shell structure which is communicated with the front and back, ventilation openings are formed in the front and back side walls of the shell, the shielding frame is fixed at the ventilation openings, the protective shell is fixed on the shielding frame, the fan is fixed on one side face of the shielding frame, facing the protective shell, of the protective shell, and the filter plate fixed on the protective shell is arranged on one side, facing away from the shielding frame, of the fan.

7. The on-line monitoring terminal of ground resistance of claim 1, wherein: the bottom of casing fixedly connected with a plurality of attenuator, the below of casing is equipped with a bottom plate, every the lower part of attenuator all with bottom plate fixed connection, the upper portion sliding connection of bottom plate has a plurality of spacing posts, the upper portion of casing is equipped with a buckle that can reciprocate.

8. The on-line monitoring terminal of ground resistance of claim 7, wherein: the utility model discloses a motor, including casing, first helical gear, second helical gear and buckle, servo motor's bottom fixedly connected with, servo motor's output shaft fixedly connected with first helical gear, first helical gear meshing has the second helical gear of rotation installation on the casing bottom, the bottom of casing rotates and is connected with a plurality of threaded rods, every the lower part fixedly connected with two runners of threaded rod, the runner on second helical gear and the plurality of threaded rods passes through the belt and connects in order, every equal threaded connection of threaded rod has a siphunculus, the siphunculus is fixed on the device platform, and every the top of siphunculus is all inconsistent with the buckle.

9. An on-line detection method for ground resistance, which is characterized by comprising the on-line monitoring terminal for ground resistance according to any one of claims 1-8, and is characterized in that: the method comprises the following steps:

s1, installing a shell and an auxiliary box at a fixed point position, wherein the auxiliary boxes are divided into two groups, and the two groups of auxiliary boxes are respectively installed at 20m and 40m away from the shell;

step S2, an on-line monitoring terminal of the grounding resistor is connected to an upper computer through a communication network provided by communication equipment;

step S3, setting a ground resistance monitoring period of the online detection terminal through the upper computer, and periodically sending a monitoring instruction to the online detection terminal by the upper computer according to the set monitoring period;

step S4, the on-line monitoring terminal controls the double-shaft motor and the pneumatic cylinder to start according to a preset operation interval according to a received instruction of the upper computer so as to drive the wiring blocks to be sequentially inserted into the wiring grooves on the conversion plate, and the resistance values of the grounding resistors corresponding to the plurality of groups of auxiliary boxes are collected;

s5, the detection equipment collects the resistance values detected in the step S4, a plurality of groups of resistance data are transmitted to the main control module, calculation and analysis are carried out through the main control module, the data are stored in the data storage equipment, and meanwhile the data calculated and analyzed by the main control module are uploaded to the upper computer through the communication equipment;

s6, the upper computer processes the received data to obtain two average resistance values corresponding to 20m and 40m respectively, and then the upper computer compares the calculated average resistance value with a standard resistance value to judge whether the grounding resistance of the position of the auxiliary box is abnormal;

and step S7, if the monitoring terminal is normal, repeating the steps S4-S6, and periodically detecting and maintaining the monitoring terminal by personnel, and if the monitoring terminal is abnormal, sending out alarm information by the upper computer so as to facilitate the subsequent operation of the personnel.

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