CN113311059B - Grounding grid corrosion detection and positioning method based on Internet of things technology - Google Patents
Grounding grid corrosion detection and positioning method based on Internet of things technology Download PDFInfo
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Abstract
A method for detecting and positioning corrosion of a grounding grid based on the technology of Internet of things adopts an embedded small-sized detection device, and based on a cluster-chain hybrid network structure, encrypts and compresses ground surface position information and a magnetic field strength value and then transmits the information to wireless gateway equipment; and the analysis platform realizes the corrosion detection and positioning of the grounding grid according to the detection data. The detection system deployment is simplified, and the cost is reduced; the electromagnetic induction principle realizes the non-contact detection of the state of the grounding grid, does not need external leads, and has no influence on the grounding grid and transformer substation equipment; the method comprises the steps that a detection network is formed by a plurality of detection devices and a wireless communication gateway by applying the technology of the Internet of things, and full-coverage detection of a grounding network is realized; the detection device is fixed on the earth surface, the number of detection points is increased or decreased according to actual requirements, and the monitoring is flexible and efficient; under the conditions that the grounding grid is not excavated and the normal operation of the system is not influenced, the defects of the grounding grid are diagnosed and early-warned, and the defect points are accurately positioned, so that the defects of the grounding grid can be regularly detected and can also be monitored in real time on line.
Description
Technical Field
The invention relates to the technical field of grounding grid detection, in particular to a grounding grid corrosion detection and positioning method based on the technology of the Internet of things.
Background
The grounding grid is an important guarantee for the safe operation of the transformer substation, and the grounding performance of the grounding grid is always valued by production and operation departments. Because the grounding grid is buried underground, corrosion easily occurs, grounding resistance is increased, grounding reliability is affected, serious accidents are possibly caused, and huge economic loss is brought. The method can accurately detect the rusty fracture of the grounding grid conductor caused by corrosion and other reasons, and has important engineering application value for the safety of personnel and equipment of the transformer substation.
At present, the corrosion of the grounding grid can only be detected regularly, a simple and convenient automatic detection means is lacked, and the actual state of the grounding grid is difficult to reflect in time.
In the prior art, corrosion detection of a grounding grid mainly depends on detection personnel carrying special detection machinery and equipment to measure and troubleshoot grids of the grounding grid one by one on site, the detection mode is low in efficiency and poor in precision, and the detection equipment is generally heavy and difficult to move or install. The chinese patent (CN 103197193B) proposes a method and a system for determining corrosion points of a grounding grid, which obtains the detection result of corrosion points by detecting the intensity of alternating magnetic field at detected points in the grounding grid and processing data, but the detection method is limited by site conditions of a transformer substation in operation when the detection method is used for full coverage detection of all corrosion points of the grounding grid, so that the problems of large detection workload, low detection speed and the like exist in the existing detection method. According to the transformer substation grounding grid corrosion detection system and method based on the earth surface magnetic induction intensity, when the earth surface magnetic induction intensity is measured, the magnetic induction intensity components of a grounding body are measured one by one according to a grounding grid design drawing, however, the position of the grounding grid can be adjusted in the construction stage, the measurement is carried out according to the design drawing, the measurement efficiency is obviously reduced, and even the measurement positioning dislocation can occur.
Disclosure of Invention
In order to overcome the defects in the prior art, the invention aims to provide a grounding grid corrosion detection and positioning method based on the internet of things technology.
The invention adopts the following technical scheme.
A grounding grid corrosion detection and positioning method based on the technology of the Internet of things comprises the following steps:
and 5, uploading the converged detection data to an analysis platform by the wireless gateway equipment, and realizing the detection of the corrosion state of the grounding grid and the positioning of corrosion points according to the position information of the earth surface and the corresponding magnetic field strength value.
Preferably, in step 2, the detection area includes: a first detection area, a second detection area and a third detection area; wherein the content of the first and second substances,
the distance between any point in the first detection area and the gateway device does not exceed the upper limit of the wireless transmission distance of the gateway device, the distance between any point in the second detection area and the gateway device does not exceed the sum of the upper limit of the wireless transmission distance of the gateway device and the upper limit of the wireless transmission distance of the relay device, and areas outside the first detection area and the second detection area are uniformly divided into a third detection area.
Preferably, the first and second electrodes are formed of a metal,
the step 2 comprises the following steps:
step 2.1, dividing the grounding grid to be detected into a first detection area, a second detection area and a third detection area according to the position of the gateway equipment;
step 2.2, the wireless detection device arranged in the first detection area comprises a plurality of acquisition devices; the acquisition equipment is fixedly arranged on the ground surface of the grounding grid in the first detection area and is positioned right above the grounding body;
step 2.3, the wireless detection device arranged in the second detection area comprises a plurality of acquisition devices and a relay device; the acquisition equipment is fixedly arranged on the ground surface of the grounding grid in the second detection area and is positioned right above the grounding body, and the distance between the relay equipment and the gateway equipment does not exceed the upper limit of the wireless transmission distance of the gateway equipment;
step 2.4, the wireless detection device arranged in the third detection area comprises a plurality of acquisition devices and a plurality of relay devices; the acquisition equipment is fixedly arranged on the ground surface of the grounding grid in the third detection area and is positioned right above the grounding body;
dividing the third detection area into a plurality of local areas according to the position of the relay equipment, wherein the distance between the acquisition equipment and the relay equipment in any local area does not exceed the upper limit of the wireless transmission distance of the relay equipment; only one relay device is arranged in each local area;
and 2.5, respectively realizing the connection between the wireless detection devices in each detection area and the gateway equipment based on the cluster-chain hybrid network structure.
Step 2.5 comprises:
step 2.5.1, in the first detection area, each acquisition device is directly in wireless connection with the gateway device;
step 2.5.2, in the second detection area, each acquisition device is wirelessly connected with the relay device, and then the relay device is wirelessly connected with the gateway device;
and 2.5.3, in the third detection area, the acquisition equipment in each local area is wirelessly connected with the relay equipment in the local area, the relay equipment in each local area is wirelessly connected with the relay equipment closest to the gateway equipment, and the relay equipment closest to the gateway equipment is finally wirelessly connected with the gateway equipment.
The acquisition equipment is arranged on the earth surface right above the grounding body by adopting an embedded technology, and at least one acquisition equipment is arranged right above the same grounding body.
Preferably, the first and second liquid crystal display panels are,
the step 3 comprises the following steps:
step 3.1, in the first detection area, after the acquisition equipment is electrified, actively sending a network access authentication request to the gateway equipment;
step 3.2, in the second detection area, after the acquisition equipment is electrified, firstly sending a network access authentication request to the relay equipment, and sending all the collected network access authentication requests to the gateway equipment by the relay equipment;
step 3.3, after the acquisition equipment of each local area is electrified in the third detection area, firstly sending a network access authentication request to the relay equipment in the local area, sending the collected network access authentication request to the relay equipment closest to the gateway equipment by the relay equipment in each local area, and then sending all the finally collected network access authentication requests to the gateway equipment by the relay equipment;
step 3.4, after receiving the network access authentication request of the acquisition equipment in each detection area, the gateway equipment returns a network access permission instruction to the acquisition equipment in each detection area after checking the correctness;
and 3.5, after the acquisition equipment in each detection area is connected to the network, acquiring the position information of the ground network surface in the detection area where the acquisition equipment is located, encrypting and compressing the position information, and sending the encrypted and compressed position information to the wireless gateway equipment.
Step 3.5 comprises:
step 3.5.1, the acquisition equipment in the first detection area encrypts and compresses the position information of the earth surface where the acquisition equipment is located, and then directly sends the encrypted and compressed position information to the wireless gateway equipment;
step 3.5.2, the acquisition equipment in the second detection area encrypts and compresses the position information of the ground surface where the acquisition equipment is located, and then sends the encrypted and compressed position information to the relay equipment, and the relay equipment sends the collected encrypted and compressed detection data to the wireless gateway equipment;
and 3.5.3, in the third detection area, the acquisition equipment in each local area encrypts and compresses the position information of the ground surface where the acquisition equipment is located, and then sends the encrypted and compressed position information to the relay equipment in the local area, the relay equipment in each local area sends the collected encrypted and compressed detection data to the relay equipment closest to the gateway equipment, and then the relay equipment sends all the finally collected encrypted and compressed detection data to the gateway equipment.
Preferably, the first and second electrodes are formed of a metal,
and 4, connecting a sinusoidal pilot frequency excitation current source at the corrosion detection terminal of the grounding grid, and providing a sinusoidal current with a constant amplitude to the grounding grid from a grounding down lead embedded at the corrosion detection terminal of the grounding grid by the current source.
The step 4 comprises the following steps:
step 4.1, the collection equipment in the first detection area directly sends the collected magnetic field strength value to the wireless gateway equipment after encryption and compression;
step 4.2, the collection equipment in the second detection area encrypts and compresses the collected magnetic field intensity value and then sends the encrypted and compressed magnetic field intensity value to the relay equipment, and the relay equipment sends the collected encrypted and compressed detection data to the wireless gateway equipment;
and 4.3, in the third detection area, the collection equipment in each local area encrypts and compresses the collected magnetic field intensity value and then sends the magnetic field intensity value to the relay equipment in the local area, the relay equipment in each local area sends the collected encrypted and compressed detection data to the relay equipment closest to the gateway equipment, and then the relay equipment sends all the finally collected encrypted and compressed detection data to the gateway equipment.
The beneficial effects of the invention are that compared with the prior art:
1. the signal acquisition device adopts an embedded miniaturized design of a full wireless structure, so that the detection system is simple in deployment, low in cost and beneficial to popularization;
2. the electromagnetic induction principle is adopted to realize the non-contact detection of the state of the grounding grid, and the detection device does not need to be externally connected with any lead wire and has no influence on the grounding grid and substation equipment;
3. the monitoring network is formed by a plurality of detection devices and a wireless communication gateway by applying the technology of the Internet of things, so that the full-coverage dead-corner-free monitoring of the transformer substation is realized; the detection device only needs to be fixed on the ground surface, the number of monitoring points can be increased or decreased according to actual requirements, the monitoring is flexible, and the efficiency is high;
4. the method can realize diagnosis and early warning of the defects of the grounding grid and accurate positioning of the defect points under the conditions that the grounding grid is not excavated and the normal operation of the system is not influenced, and can carry out periodic detection and real-time online monitoring according to actual needs.
Drawings
FIG. 1 is a block diagram of a process of a grounding grid corrosion detection and positioning method based on the Internet of things technology according to the present invention;
fig. 2 is a schematic diagram of a connection relationship formed by different detection areas based on a cluster-chain hybrid network structure in the method for detecting and positioning corrosion of a grounding grid based on the internet of things technology;
fig. 3 is a schematic layout diagram of a detection device in the method for detecting and positioning corrosion of a grounding grid based on the internet of things technology.
Detailed Description
The present application is further described below with reference to the accompanying drawings. The following examples are only used to illustrate the technical solutions of the present invention more clearly, and the protection scope of the present application is not limited thereby.
Referring to fig. 1, a method for detecting and positioning corrosion of a grounding grid based on the internet of things technology includes the following steps:
In the preferred embodiment, a horizontal grounding grid of a large-scale transformer substation is used as a research object, and a three-dimensional model of the grounding grid to be detected is built in an analysis platform based on a three-dimensional design means.
In particular, the amount of the solvent to be used,
the step 2 comprises the following steps:
and 2.1, dividing the grounding grid to be detected into a first detection area, a second detection area and a third detection area according to the position of the gateway equipment.
Step 2.2, the wireless detection device arranged in the first detection area comprises a plurality of acquisition devices; the acquisition equipment is fixedly arranged on the ground surface of the grounding grid in the first detection area and is positioned right above the grounding body.
Step 2.3, the wireless detection device arranged in the second detection area comprises a plurality of acquisition devices and a relay device; the acquisition equipment is fixedly arranged on the ground surface of the grounding grid in the second detection area and is positioned right above the grounding body, and the distance between the relay equipment and the gateway equipment does not exceed the upper limit of the wireless transmission distance of the gateway equipment.
Step 2.4, the wireless detection device arranged in the third detection area comprises a plurality of acquisition devices and a plurality of relay devices; the acquisition equipment is fixedly arranged on the ground surface of the grounding grid in the third detection area and is positioned right above the grounding body;
dividing the third detection area into a plurality of local areas according to the position of the relay equipment, wherein the distance between the acquisition equipment and the relay equipment in any local area does not exceed the upper limit of the wireless transmission distance of the relay equipment; only one relay device is arranged within each local area.
And 2.5, respectively realizing the connection between the wireless detection devices in each detection area and the gateway equipment based on the cluster-chain hybrid network structure.
Specifically, as shown in fig. 2, step 2.5 comprises:
step 2.5.1, in the first detection area, each acquisition device directly wirelessly connects with the gateway device-
Step 2.5.2, in the second detection area, each acquisition device is wirelessly connected with the relay device, and then the relay device is wirelessly connected with the gateway device;
and 2.5.3, in the third detection area, the acquisition equipment in each local area is wirelessly connected with the relay equipment in the local area, the relay equipment in each local area is wirelessly connected with the relay equipment closest to the gateway equipment, and the relay equipment closest to the gateway equipment is finally wirelessly connected with the gateway equipment.
The acquisition equipment is arranged on the earth surface right above the grounding body by adopting an embedded technology, and at least one acquisition equipment is arranged right above the same grounding body.
In the preferred embodiment of the invention, the acquisition equipment adopts miniaturized signal acquisition equipment based on an embedded technology; this collection equipment is with low costs, the device deployment is also more simple and convenient, and the device only needs to accomplish once the installation, alright detect in order to continuously to the grounding grid corrosion conditions, need not often to change, has reduced fortune dimension work load. Arrange an acquisition equipment directly over same ground conductor at least, can increase and decrease acquisition equipment's quantity according to the actual measurement demand for detection scheme is nimble changeable, and the suitability is high.
In the preferred embodiment of the invention, based on the technology of the Internet of things, a full wireless communication mode is adopted between the acquisition equipment and the gateway, the method is suitable for various types of field environments, and unattended real-time monitoring of corrosion of the grounding grid of the transformer substation is realized. Particularly for a large-scale transformer substation, the whole coverage of the transformer substation is realized by carrying out grid decomposition on a tested grounding network area of the transformer substation into a plurality of small areas and combining a network cluster-chain hybrid network.
In particular, the amount of the solvent to be used,
the step 3 comprises the following steps:
and 3.1, actively sending a network access authentication request to the gateway equipment after the acquisition equipment is electrified in the first detection area.
And 3.2, in the second detection area, after the acquisition equipment is electrified, firstly sending a network access authentication request to the relay equipment, and sending all the collected network access authentication requests to the gateway equipment by the relay equipment.
And 3.3, after the acquisition equipment of each local area in the third detection area is electrified, firstly sending a network access authentication request to the relay equipment in the local area, sending the collected network access authentication request to the relay equipment closest to the gateway equipment by the relay equipment in the local area, and then sending all the finally collected network access authentication requests to the gateway equipment by the relay equipment.
And 3.4, after receiving the network access authentication request of the acquisition equipment in each detection area, the gateway equipment returns a network access permission instruction to the acquisition equipment in each detection area after checking the correctness.
And 3.5, after the acquisition equipment in each detection area is connected to the network, acquiring the position information of the ground network surface in the detection area where the acquisition equipment is located, encrypting and compressing the position information, and sending the encrypted and compressed position information to the wireless gateway equipment.
Step 3.5 comprises:
and 3.5.1, the acquisition equipment in the first detection area encrypts and compresses the position information of the earth surface where the acquisition equipment is located, and then directly sends the encrypted and compressed position information to the wireless gateway equipment.
And 3.5.2, the acquisition equipment in the second detection area encrypts and compresses the position information of the earth surface where the acquisition equipment is located, and then sends the encrypted and compressed position information to the relay equipment, and the relay equipment sends the collected encrypted and compressed detection data to the wireless gateway equipment.
And 3.5.3, in the third detection area, the acquisition equipment in each local area encrypts and compresses the position information of the ground surface where the acquisition equipment is located, and then sends the encrypted and compressed position information to the relay equipment in the local area, the relay equipment in each local area sends the collected encrypted and compressed detection data to the relay equipment closest to the gateway equipment, and then the relay equipment sends all the finally collected encrypted and compressed detection data to the gateway equipment.
The preferred embodiment of the invention improves the safety of the whole detection network by introducing the network access authentication mechanism. And when all the acquisition equipment are connected to the network, the detection of the transformer substation grounding network conductor in full coverage and no dead angle is completed.
And 4, inputting a sine current with a constant amplitude into the grounding network to be detected, acquiring the magnetic field intensity value of the ground surface of the grounding network in the detection area by using the wireless detection device, encrypting and compressing the magnetic field intensity value, and transmitting the encrypted and compressed magnetic field intensity value to the wireless gateway equipment.
In the preferred embodiment, as shown in fig. 3, a sinusoidal pilot frequency excitation current source is connected to the ground grid corrosion detection terminal, and a sinusoidal current with a constant amplitude is provided to the ground grid from a ground down lead embedded at the ground grid corrosion detection terminal.
In particular, the amount of the solvent to be used,
the step 4 comprises the following steps:
and 4.1, the acquisition equipment in the first detection area directly transmits the acquired magnetic field strength value to the wireless gateway equipment after encryption and compression.
And 4.2, the acquisition equipment in the second detection area encrypts and compresses the acquired magnetic field intensity value and then sends the encrypted and compressed magnetic field intensity value to the relay equipment, and the relay equipment sends the collected encrypted and compressed detection data to the wireless gateway equipment.
And 4.3, in the third detection area, the collection equipment in each local area encrypts and compresses the collected magnetic field intensity value and then sends the magnetic field intensity value to the relay equipment in the local area, the relay equipment in each local area sends the collected encrypted and compressed detection data to the relay equipment closest to the gateway equipment, and the relay equipment sends all the finally collected encrypted and compressed detection data to the gateway equipment.
And 5, uploading the converged detection data to an analysis platform by the wireless gateway equipment, and realizing the detection of the corrosion state of the grounding grid and the positioning of corrosion points according to the position information of the earth surface and the corresponding magnetic field strength value.
In the preferred embodiment of the invention, the field acquisition equipment simultaneously acquires the detection data of the corrosion of the grounding grid and the position information of the acquisition equipment, and the detection data and the position information are combined, so that the position where the corrosion occurs can be directly marked, and the maintenance accuracy and efficiency are improved.
Compared with the prior art, the invention has the beneficial effects that:
1. the signal acquisition device adopts an embedded miniaturized design of a full wireless structure, so that the detection system is simple in deployment, low in cost and beneficial to popularization;
2. the electromagnetic induction principle is adopted to realize the non-contact detection of the state of the grounding grid, and the detection device does not need to be externally connected with any lead wire and has no influence on the grounding grid and substation equipment;
3. the monitoring network is formed by a plurality of detection devices and a wireless communication gateway by applying the technology of the Internet of things, so that the full-coverage dead-corner-free monitoring of the transformer substation is realized; the detection device only needs to be fixed on the ground surface, the number of monitoring points can be increased or decreased according to actual requirements, the monitoring is flexible, and the efficiency is high;
4. the method can realize diagnosis and early warning of the defects of the grounding grid and accurate positioning of the defect points under the conditions that the grounding grid is not excavated and the normal operation of the system is not influenced, and can carry out periodic detection and real-time online monitoring according to actual requirements.
The present applicant has described and illustrated embodiments of the present invention in detail with reference to the accompanying drawings, but it should be understood by those skilled in the art that the above embodiments are merely preferred embodiments of the present invention, and the detailed description is only for the purpose of helping the reader to better understand the spirit of the present invention, and not for limiting the scope of the present invention, and on the contrary, any improvement or modification made based on the spirit of the present invention should fall within the scope of the present invention.
Claims (8)
1. A grounding grid corrosion detection and positioning method based on the technology of Internet of things is characterized in that,
the detection and positioning method comprises the following steps:
step 1, establishing a three-dimensional model of a grounding network to be tested in an analysis platform based on a three-dimensional design means;
step 2, dividing the grounding grid to be detected into three detection areas according to the position of the gateway equipment, wherein the three detection areas comprise a first detection area, a second detection area and a third detection area, the distance between any point in the first detection area and the gateway equipment does not exceed the upper limit of the wireless transmission distance of the gateway equipment, the distance between any point in the second detection area and the gateway equipment does not exceed the sum of the upper limit of the wireless transmission distance of the gateway equipment and the upper limit of the wireless transmission distance of the relay equipment, and the areas outside the first detection area and the second detection area are uniformly divided into the third detection area; arranging corresponding wireless detection devices in different detection areas, wherein the wireless detection devices are all arranged on the ground surface of the grounding grid; the wireless detection device arranged in the first detection area comprises a plurality of acquisition devices, the wireless detection device arranged in the second detection area comprises a plurality of acquisition devices and a relay device, and the wireless detection device arranged in the third detection area comprises a plurality of acquisition devices and a plurality of relay devices; dividing the third detection area into a plurality of local areas according to the positions of the relay devices in the third detection area, wherein only one relay device is arranged in each local area; the acquisition equipment is arranged on the earth surface right above the grounding body by adopting an embedded technology; based on a cluster-chain hybrid network structure, the connection between the wireless detection device and the gateway equipment in each detection area is realized;
step 3, under the normal operation of the grounding grid to be detected, the wireless detection device collects the position information of the grounding grid surface in the detection area where the wireless detection device is located, encrypts and compresses the position information and then sends the position information to the wireless gateway equipment; the analysis platform corresponds the position information to the grounding bodies in the grounding grid three-dimensional model one by one;
step 4, inputting a sine current with a constant amplitude into the grounding network to be detected, acquiring a magnetic field intensity value of the ground surface of the grounding network in a detection area in which the grounding network is positioned by using a wireless detection device, encrypting and compressing the magnetic field intensity value, and sending the encrypted and compressed magnetic field intensity value to wireless gateway equipment;
and 5, uploading the converged detection data to an analysis platform by the wireless gateway equipment, and realizing the detection of the corrosion state of the grounding grid and the positioning of corrosion points according to the position information of the earth surface and the corresponding magnetic field strength value.
2. The grounding grid corrosion detection and positioning method based on the Internet of things technology as claimed in claim 1,
the step 2 comprises the following steps:
step 2.1, dividing the grounding grid to be detected into a first detection area, a second detection area and a third detection area according to the position of the gateway equipment;
step 2.2, the acquisition equipment is fixedly arranged on the ground surface of the grounding grid in the first detection area and is positioned right above the grounding body;
step 2.3, the acquisition equipment is fixedly arranged on the ground surface of the grounding grid in the second detection area and is positioned right above the grounding body, and the distance between the relay equipment and the gateway equipment does not exceed the upper limit of the wireless transmission distance of the gateway equipment;
step 2.4, the acquisition equipment is fixedly arranged on the ground surface of the grounding grid in the third detection area and is positioned right above the grounding body;
the distance between the acquisition equipment and the relay equipment in any local area in the third detection area does not exceed the wireless transmission distance upper limit of the relay equipment;
and 2.5, respectively realizing the connection between the wireless detection devices in each detection area and the gateway equipment based on the cluster-chain hybrid network structure.
3. The grounding grid corrosion detection and positioning method based on the IOT technology of claim 2,
step 2.5 comprises:
2.5.1, in the first detection area, each acquisition device is directly in wireless connection with the gateway device;
step 2.5.2, in the second detection area, each acquisition device is wirelessly connected with the relay device, and then the relay device is wirelessly connected with the gateway device;
and 2.5.3, in the third detection area, the acquisition equipment in each local area is wirelessly connected with the relay equipment in the local area, the relay equipment in each local area is wirelessly connected with the relay equipment closest to the gateway equipment, and the relay equipment closest to the gateway equipment is finally wirelessly connected with the gateway equipment.
4. The grounding grid corrosion detection and positioning method based on the IOT technology of claim 1,
at least one acquisition device is arranged right above the same grounding body.
5. The grounding grid corrosion detection and positioning method based on the IOT technology of claim 2,
the step 3 comprises the following steps:
step 3.1, in the first detection area, after the acquisition equipment is electrified, actively sending a network access authentication request to the gateway equipment;
step 3.2, in the second detection area, after the acquisition equipment is electrified, firstly sending a network access authentication request to the relay equipment, and sending all the collected network access authentication requests to the gateway equipment by the relay equipment;
step 3.3, after the acquisition equipment of each local area is electrified in the third detection area, firstly sending a network access authentication request to the relay equipment in the local area, sending the collected network access authentication request to the relay equipment closest to the gateway equipment by the relay equipment in each local area, and then sending all the finally collected network access authentication requests to the gateway equipment by the relay equipment;
step 3.4, after receiving the network access authentication request of the acquisition equipment in each detection area, the gateway equipment returns a network access permission instruction to the acquisition equipment in each detection area after checking the correctness;
and 3.5, after the acquisition equipment in each detection area is connected to the network, acquiring the position information of the earth surface of the grounding network in the detection area, encrypting and compressing the position information and then sending the position information to the wireless gateway equipment.
6. The grounding grid corrosion detection and positioning method based on the IOT technology of claim 5,
step 3.5 comprises:
step 3.5.1, the acquisition equipment in the first detection area encrypts and compresses the position information of the earth surface where the acquisition equipment is located, and then directly sends the encrypted and compressed position information to the wireless gateway equipment;
step 3.5.2, the acquisition equipment in the second detection area encrypts and compresses the position information of the ground surface where the acquisition equipment is located, and then sends the encrypted and compressed position information to the relay equipment, and the relay equipment sends the collected encrypted and compressed detection data to the wireless gateway equipment;
and 3.5.3, in the third detection area, the acquisition equipment in each local area encrypts and compresses the position information of the ground surface where the acquisition equipment is located, and then sends the encrypted and compressed position information to the relay equipment in the local area, the relay equipment in each local area sends the collected encrypted and compressed detection data to the relay equipment closest to the gateway equipment, and then the relay equipment sends all the finally collected encrypted and compressed detection data to the gateway equipment.
7. The grounding grid corrosion detection and positioning method based on the IOT technology of claim 1,
and 4, connecting a sinusoidal pilot frequency excitation current source at the corrosion detection terminal of the grounding grid, and providing a sinusoidal current with a constant amplitude to the grounding grid from a grounding down lead embedded at the corrosion detection terminal of the grounding grid by the current source.
8. The grounding grid corrosion detection and positioning method based on the Internet of things technology as claimed in claim 2,
step 4 comprises the following steps:
step 4.1, the collection equipment in the first detection area directly sends the collected magnetic field strength value to the wireless gateway equipment after encryption and compression;
step 4.2, the collection equipment in the second detection area encrypts and compresses the collected magnetic field intensity value and then sends the encrypted and compressed magnetic field intensity value to the relay equipment, and the relay equipment sends the collected encrypted and compressed detection data to the wireless gateway equipment;
and 4.3, in the third detection area, the collection equipment in each local area encrypts and compresses the collected magnetic field intensity value and then sends the magnetic field intensity value to the relay equipment in the local area, the relay equipment in each local area sends the collected encrypted and compressed detection data to the relay equipment closest to the gateway equipment, and then the relay equipment sends all the finally collected encrypted and compressed detection data to the gateway equipment.
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