CN205139294U - Ground net corrodes situation testing arrangement based on wireless sensor network - Google Patents
Ground net corrodes situation testing arrangement based on wireless sensor network Download PDFInfo
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- 238000012360 testing method Methods 0.000 title claims abstract description 140
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- 238000003199 nucleic acid amplification method Methods 0.000 claims description 24
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- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 1
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Abstract
The utility model relates to a ground net corrodes situation testing arrangement based on wireless sensor network, include: the driving source module for to ground net input code signal, test module for gather the electromagnetic wave signal of ground net, the test host computer is used for receiving the electromagnetic wave signal that test module gathered, and output the corruption and the break -make state of ground net, between driving source module and the test host computer to and all through the wireless network connection communication between test module and the test host computer. The utility model has the advantages of the testing process is simple quick, need not dig the table of turning up the soil, and the testing result is accurate.
Description
Technical field
The utility model relates to a kind of ground net corrosion situation proving installation based on wireless sensor network.
Background technology
Grounded screen is the important guarantee of safe operation of power system, and the quality of its ground connection performance is directly connected to the personal safety of staff in transformer station and the safe operation of various electrical equipment, is thus subject to the great attention of Electric Design and production run department always.
The conductor forming grounded screen is embedded in underground, often because of the reason such as failure welding or solder skip, soil corrosion, earth short circuit current electrodynamic action during construction, along with the increase of tenure of use, easily to corrode, earth conductor may be made to attenuate even rupture, destroy the original structure of grounded screen, such that the electrical connection performance of grounded screen reduces, stake resistance increases, thus cause the partial potential difference of grounded screen own or the increase of grounded screen potential anomalies.Once electric system is struck by lightning or the fault that is short-circuited, not only can bring danger to staff, more easily cause detection and control equipment malfunction to do and the impact of expansion accident.In China, because the grounded screen material of most of transformer station is plain carbon steel, etching problem is relatively outstanding.Because even the rupture accident of the electric system caused of ground net corrosion happens occasionally, cause huge economic loss and bad social influence.
In recent years, the heavy corrosion section of searching grounded screen becomes the great anti-accident measures of power department one, in Practical Project, for the measurement of grounded screen fault point, usually according to the soil corrosion rate in area, empirically estimate grounding grids extent of corrosion, then sampling excavates earth's surface and checks.This method with blindness, workload is large, speed is slow, and is subject to the restriction of on-the-spot service condition, can not judge extent of corrosion and breakpoint location exactly.
Utility model content
The purpose of this utility model proposes a kind of ground net corrosion situation proving installation based on wireless sensor network, and have testing process simple and quick, do not need to excavate earth's surface, testing result is advantage accurately.
In order to achieve the above object, the technical solution adopted in the utility model is as follows: a kind of ground net corrosion situation proving installation based on wireless sensor network, is characterized in that, comprising:
Driving source module, for grounded screen incoming coded signal;
Test module, for gathering the electromagnetic wave signal of grounded screen;
Test Host, for receiving the electromagnetic wave signal that described test module gathers, and exports corrosion and the on off operating mode of described grounded screen;
Between described driving source module and Test Host, and all by wireless network connecting communication between test module and Test Host.
According to above scheme, described Test Host comprises:
Input display unit, for inputting instruction and parameters to Test Host, and shows test results and work state information;
FPGA module, for calculating corrosion and the on off operating mode of grounded screen according to input information;
The input end of described input display unit and output terminal are connected to output terminal and the input end of described FPGA module.
According to above scheme, described Test Host also comprises the environmental parameter sensor of the input end being connected to described FPGA module, described for gathering environment temperature and humidity, the soil moisture and humidity information and sending to described FPGA module.
According to above scheme, described driving source module comprises:
Coded signal circuit for generating, for generating the coded signal to grounded screen input;
Power amplification circuit, carries out power amplification for the coded signal generated by described coded signal circuit for generating;
Calibrating terminal, for being input to grounded screen by the coded signal after power amplification;
The output terminal of described coded signal circuit for generating is connected to the input end of described power amplification circuit, and the input end of described calibrating terminal is connected to the output terminal of described power amplification circuit.
According to above scheme, described test module comprises:
Inductive coil, for receiving the electromagnetic wave signal with coded signal that grounded screen gives off;
Signal processing module, processes for the electromagnetic wave signal received by described inductive coil, to obtain coded signal and to send to described Test Host;
The output terminal of described inductive coil is connected to the input end of described signal processing module.
According to above scheme, described signal processing module comprises:
Filtering and amplifying circuit, the electromagnetic wave signal for being received by described inductive coil carries out amplification and bandpass filtering;
Relevant testing circuit, for suppressing undesired signal;
Analog to digital conversion circuit, for converting simulating signal to digital signal;
The input end of described filtering and amplifying circuit is connected to the output terminal of described inductive coil, the input end of described relevant testing circuit is connected to the output terminal of described filtering and amplifying circuit, and the input end of analog-digital conversion circuit as described is connected to the output terminal of described relevant testing circuit.
According to above scheme, described test module has multiple, and when testing grounded screen, described multiple test module is arranged side by side the top ground surface in described grounded screen respectively.
According to above scheme, described multiple test module array that is square is arranged in the top ground surface of described grounded screen line by line.
The utility model adopts and can effectively suppress the coded signal of power frequency electromagnetic field and each harmonic signal disturbing thereof to load to grounded screen to be measured, if grounded screen exists corrosion, some branch road can be made to rupture or obviously attenuate and impedance increase, causing the coded signal being injected into grounded screen to distort; The test module being positioned at ground surface receives the electromagnetic wave from grounded screen radiation and sends to Test Host; Test Host calculates the basic structure of grounded screen and the corrosion condition of every bar branch road according to the electromagnetic wave receiving test module transmission, test result is displayed finally by graphical interfaces.Because the corrosion condition that grounded screen is different can cause electromagnetic wave that different degree distortion occurs, so the radiation information from grounded screen to be measured that test module receives characterizes the extent of corrosion of grounded screen respective branch, the corrosion condition of grounded screen can be drawn by the difference detecting the signal obtained, do not need to excavate earth's surface to check, also not by the restriction of existing site inspection condition, extent of corrosion and the breakpoint location of grounded screen can be judged exactly, have that accuracy is high, workload is little, fireballing advantage.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model;
Fig. 2 is the structural representation of Test Host of the present utility model;
Fig. 3 is the structural representation of driving source module of the present utility model;
Fig. 4 is the structural representation of test module of the present utility model.
In figure: 10, driving source module; 20, test module; 30, Test Host; 11, coded signal circuit for generating; 12, power amplification circuit; 13, wireless sensor network node II; 21, inductive coil; 22, filtering and amplifying circuit; 23, relevant testing circuit; 24, analog to digital conversion circuit; 25, wireless sensor network node III; 31, display unit is inputted; 32, FPGA module; 33, environmental parameter sensor; 34, wireless sensor network node I.
Embodiment
Below in conjunction with accompanying drawing and embodiment, the technical solution of the utility model is described.
As shown in Figure 1, a kind of ground net corrosion situation proving installation based on wireless sensor network described in the utility model, comprising: driving source module 10, for grounded screen incoming coded signal; Test module 20, for gathering the electromagnetic wave signal of grounded screen; Test Host 30, for receiving the electromagnetic wave signal that described test module 20 gathers, and exports corrosion and the on off operating mode of described grounded screen; Between described driving source module 10 and Test Host 30, and all by wireless network connecting communication between test module 20 and Test Host 30.
The utility model adopts and can effectively suppress the coded signal of power frequency electromagnetic field and each harmonic signal disturbing thereof to load to grounded screen to be measured, if grounded screen exists corrosion, some branch road can be made to rupture or obviously attenuate and impedance increase, causing the coded signal being injected into grounded screen to distort; The test module 20 being positioned at ground surface receives the electromagnetic wave from grounded screen radiation and sends to Test Host 30; Test Host 30 calculates the basic structure of grounded screen and the corrosion condition of every bar branch road according to the electromagnetic wave receiving test module 20 transmission, test result is displayed finally by graphical interfaces.Because the corrosion condition that grounded screen is different can cause electromagnetic wave that different degree distortion occurs, so the radiation information from grounded screen to be measured that test module 20 receives characterizes the extent of corrosion of grounded screen respective branch, the corrosion condition of grounded screen can be drawn by the difference detecting the signal obtained, do not need to excavate earth's surface to check, also not by the restriction of site inspection condition, extent of corrosion and the breakpoint location of grounded screen can be judged exactly, all communication networks adopt wireless network to carry out connecting communication simultaneously, make detection convenient and quick construction, there is accuracy high, workload is little, fireballing advantage.
Particularly, described Test Host 30 comprises: input display unit 31, for inputting instruction and parameters to Test Host 30, and shows test results and work state information; FPGA module 32, for calculating corrosion and the on off operating mode of grounded screen according to input information; The input end of described input display unit 31 and output terminal are connected to output terminal and the input end of described FPGA module 32.Further, described Test Host 30 also comprises the environmental parameter sensor 33 of the input end being connected to described FPGA module 32, described for gathering environment temperature and humidity, the soil moisture and humidity information and sending to described FPGA module 32.
Particularly, described driving source module 10 comprises: coded signal circuit for generating 11, for generating the coded signal to grounded screen input; Power amplification circuit 12, carries out power amplification for the coded signal generated by described coded signal circuit for generating 11; Calibrating terminal, for being input to grounded screen by the coded signal after power amplification; The output terminal of described coded signal circuit for generating 11 is connected to the input end of described power amplification circuit 12, and the input end of described calibrating terminal is connected to the output terminal of described power amplification circuit 12.The utility model adopts special coded system, effectively can suppress the interference that power frequency electromagnetic field and each harmonic thereof output signal driving source module 10.
Particularly, described test module 20 comprises: inductive coil 21, for receiving the electromagnetic wave signal with coded signal that grounded screen gives off; Signal processing module, processes for the electromagnetic wave signal received by described inductive coil 21, to obtain coded signal and to send to described Test Host 30; The output terminal of described inductive coil 21 is connected to the input end of described signal processing module.In addition, described signal processing module comprises: filtering and amplifying circuit 22, and the electromagnetic wave signal for being received by described inductive coil 21 carries out amplification and bandpass filtering; Relevant testing circuit 23, for suppressing undesired signal; Analog to digital conversion circuit 24, for converting simulating signal to digital signal; The input end of described filtering and amplifying circuit 22 is connected to the output terminal of described inductive coil 21, the input end of described relevant testing circuit 23 is connected to the output terminal of described filtering and amplifying circuit 22, and the input end of analog-digital conversion circuit as described 24 is connected to the output terminal of described relevant testing circuit 23.Adopt band-pass filtering and coherent detection technology, receive the specific coding signal injected by grounded screen connection terminal from driving source module 10, further increasing signal to noise ratio (S/N ratio) and the antijamming capability of system.Further, described test module 20 has multiple, and when testing grounded screen, described multiple test module 20 is arranged side by side the top ground surface in described grounded screen respectively.Preferably, described multiple test module 20 array that is square is arranged in the top ground surface of described grounded screen line by line.
Below by way of a complete embodiment and application example thereof, the utility model is described.
Basic Cleaning Principle of the present utility model comprises: the interference adopting specific coding signal suppressing power frequency electromagnetic field and each harmonic thereof, the inductive coil 21 distributed by multiple spot gathers the electromagnetic wave signal of grounded screen radiation to be measured, adopt that the electromagnetic wave signal that all test modules 20 are measured carries out amplifying by wireless sensor network, filtering, detection, after analog to digital conversion, send to Test Host 30; The data of Test Host 30 to all test modules 20 are carried out comprehensively, calculating, obtain elementary structure parameter and each branch road extent of corrosion and crack conditions of grounded screen to be measured, and are shown by LCDs.
As shown in Figure 1, the ground net corrosion situation proving installation based on wireless network connecting communication comprises a driving source module 10, Test Host 30 and several test modules 20; Described Test Host 30 is the core of ground net corrosion situation proving installation, carry out wireless telecommunications by wireless sensor network and all test modules 20 being arranged in region to be measured of described driving source module 10, be responsible for that the initialization of system, the issue of steering order, signal are synchronous, Data Collection, data computation and analysis, test result output etc.; Described driving source module 10 adopts unique coded system, by injecting the electromagnetic wave with coded message to the connection terminal of grounded screen to be measured after power amplification, improves the ability that system suppresses power frequency electromagnetic field and each harmonic interference thereof; Described test module 20 adopts inductive coil 21 to receive from the electromagnetic wave with coded signal of grounded screen to be measured by surface radiation, after amplification filtering, coherent detection and analog to digital conversion, adopts communication to send to Test Host 30.In the utility model, the network node of wireless network connecting communication can adopt the chips such as CC2530, CC2531, CC2533, JN5148, MC13192, EM260, LINK-23X, Link-212.
The device that the utility model provides is mainly used in detection grounded screen structure and corrosion condition.Before testing, according to specification and the measuring accuracy of grounded screen to be measured, select the test module 20 of some and Test Host 30, driving source module 10 to form test macro, Test Host 30 and driving source module 10 are placed on around grounded screen to be measured; Optimized modes of emplacement is that Test Host 30 is parallel with one side of grounded screen to be measured with the line of driving source module 10, and distance 5 ~ 10 meters; The order of test module 20 according to sequence number is evenly placed line by line in grounded screen region to be measured, forms calculation matrix; During test macro initialization, Test Host 30 sends a synchronizing signal to test module 20 and driving source module 10, and clock and the starting signal of the network node of all wireless network connecting communications are synchronous; Subsequently, test module 20 is according to the radiofrequency signal calculation of characteristic parameters out position information received from Test Host 30 and driving source module 10, positional information sends to Test Host 30 by wireless sensor network node, and Test Host 30 obtains the position distribution of all test nodes in region to be measured by informix; Test Host 30 is in transmission test instruction, the electromagnetic wave signal with coding received carries out amplifying by test module 20, filtering, detection and analog to digital conversion, and send to Test Host 30 by wireless sensor network node, Test Host 30 calculates and matching according to the electromagnetic wave signal of data to whole region to be measured of all test modules 20 again, in conjunction with the location distribution information of test module 20, calculate the distribution of impedance of each branch road of grounded screen, judge its corrosion condition and break-make situation; Finally, Test Host 30 shows test result by the form of three-dimensional artificial figure.
Circuit design of the present utility model adopts low consumption circuit, is convenient to long-time field survey and carries.Fig. 2 shows the structural representation of Test Host 30, described Test Host 30 comprises wireless sensor network node I34, environmental parameter sensor 33, FPGA module 32, input display unit 31 and power circuit, described wireless sensor network node I34 and driving source module 10 and test module 20 form wireless sensor network, and wireless sensor network node I34 is the Centroid of this network, for synchronizing signal and the transmission of control signal, the collection etc. of other network child node image data; Environmental parameter sensor 33 is mainly used in gathering environment temperature, humidity, the parameter such as the soil moisture and humidity, for revising the grounded screen radiation encoding signal data that all test modules 20 gather; FPGA module 32 is mainly used in control, calculating and storage etc., and for convenience of explanation, illustrate only the part relevant to the utility model, FPGA module 32 comprises operation processing unit and storage unit; First input/output terminal of operation processing unit is connected to described wireless sensor network node I34, transmits synchronizing signal, the control command of proving installation, and receives the measurement data etc. of self-test module 20; Second input/output terminal of operation processing unit is connected to described input display unit 31, receives the input information of touch-screen, and the state of real-time display system and Measurement results; Operation processing unit is also directly connected with storage unit by internal bus, improves storage efficiency and the speed of data.The input termination 220V industrial-frequency alternating current of described power circuit, after step-down, rectification, filtering and mu balanced circuit, exports the direct current of+12V ,+5V and+3.3V, for described Test Host 30 is powered.
In the utility model, environmental parameter sensor 33 can adopt DS18B20 measures ambient temperature, SH1101 test environment humidity can be adopted, HA2002 soil temperature sensor can be adopted to measure the soil moisture, HA2001 soil humidity sensor can be adopted to measure soil moisture, LCD touch display screen can be adopted as input display unit 31, and FPGA module 32 can be EP4CE10E22C8N chip.
Fig. 3 is the structural representation of driving source module 10, described wireless sensor network node II13 is the control core of driving source module 10, the RF transmit-receive circuit that inside comprises is mainly used in receiving the synchronizing signal from Test Host 30 and steering order, according to testing process, to carry out signal synchronous with Test Host 30, guarantee that trigger instants is identical, described wireless sensor network node II13 is according to the steering order of Test Host 30, trigger pip is sent to coded signal circuit for generating 11, export specific coding, and the built-in MCU control coding chip of wireless sensor network node can be passed through, realize coded system adjustable, the input end of described power amplification circuit 12 is connected with the output terminal of coded signal circuit for generating 11, control end is connected with the I/O mouth of the built-in MUC of described wireless sensor network node II13, and the output terminal of power amplification circuit 12 is connected by the connection terminal of emitting electrode with grounded screen to be measured, the input termination 220V industrial-frequency alternating current of described power circuit, after step-down, rectification, filtering and mu balanced circuit, exports the direct current of+12V ,+5V and+3.3V, for described driving source module 10 is powered.In the utility model, coded signal circuit for generating 11 can adopt EV1527 chip to realize, and power amplification circuit 12 can adopt MGA43228 chip to realize.
Fig. 4 is the structural representation of test module 20, and described test module 20 mainly comprises inductive coil 21, filtering and amplifying circuit 22, relevant testing circuit 23, analog to digital conversion circuit 24, wireless sensor network node III25 and some source circuit.Described inductive coil 21 is for being coupled from the electromagnetic wave signal of grounded screen to be measured, the output terminal of inductive coil 21 is connected to filtering and amplifying circuit 22, the feeble signal sensed is amplified by described filtering and amplifying circuit 22, and removes undesired signal by bandpass filter; The input end of described relevant testing circuit 23 is connected to the output terminal of filtering and amplifying circuit 22, extracts coded signal by the coherent detection technology of successive ignition; The input end of analog-digital conversion circuit as described 24 is connected to the output terminal of relevant testing circuit 23, converts simulating signal to digital signal, is convenient to calculate, store and transmission; The input end of described wireless sensor network node III25 is connected to analog to digital conversion circuit 24, sends to Test Host 30 by measuring the electromagnetic wave signal with coded message obtained by communication; Described power circuit adopts chargeable lithium ion electric field to realize, and realizes+5V export with the burning voltage of+3.3V, for whole test module 20 is powered by DC-DC conversion circuit.In the utility model, inductive coil 21 can adopt enameled wire coiling to form, filtering and amplifying circuit 22 can adopt instrumentation amplifier AD620 Design enlargement circuit, INA333 designs bandpass filter, CA3070 can be adopted to design coherent detection circuit, AD7878 can be adopted to design analog to digital conversion circuit 24.
Through proving, the utility model effectively can visit the corrosion condition that buried depth is less than the grounded screen of 2.0 meters, and pass through the input display unit 31 of Test Host 30, show the structure of grounded screen and the etch state of each branch road, there is the features such as antijamming capability is strong, measurement is accurate, structure is simple, versatility good, easy to operate.
Claims (8)
1., based on a ground net corrosion situation proving installation for wireless sensor network, it is characterized in that, comprising:
Driving source module (10), for grounded screen incoming coded signal;
Test module (20), for gathering the electromagnetic wave signal of grounded screen;
Test Host (30), for receiving the electromagnetic wave signal that described test module (20) gathers, and exports corrosion and the on off operating mode of described grounded screen;
Between described driving source module (10) and Test Host (30), and all by wireless network connecting communication between test module (20) and Test Host (30).
2. a kind of ground net corrosion situation proving installation based on wireless sensor network according to claim 1, it is characterized in that, described Test Host (30) comprising:
Input display unit (31), for inputting instruction and parameters to Test Host (30), and shows test results and work state information;
FPGA module (32), for calculating corrosion and the on off operating mode of grounded screen according to input information;
The input end of described input display unit (31) and output terminal are connected to output terminal and the input end of described FPGA module (32).
3. a kind of ground net corrosion situation proving installation based on wireless sensor network according to claim 2, it is characterized in that, described Test Host (30) also comprises the environmental parameter sensor (33) of the input end being connected to described FPGA module (32), described for gathering environment temperature and humidity, the soil moisture and humidity information and sending to described FPGA module (32).
4. a kind of ground net corrosion situation proving installation based on wireless sensor network according to claim 1, it is characterized in that, described driving source module (10) comprising:
Coded signal circuit for generating (11), for generating the coded signal to grounded screen input;
Power amplification circuit (12), carries out power amplification for the coded signal described coded signal circuit for generating (11) generated;
Calibrating terminal, for being input to grounded screen by the coded signal after power amplification;
The output terminal of described coded signal circuit for generating (11) is connected to the input end of described power amplification circuit (12), and the input end of described calibrating terminal is connected to the output terminal of described power amplification circuit (12).
5. a kind of ground net corrosion situation proving installation based on wireless sensor network according to claim 1, it is characterized in that, described test module (20) comprising:
Inductive coil (21), for receiving the electromagnetic wave signal with coded signal that grounded screen gives off;
Signal processing module, processes for the electromagnetic wave signal received by described inductive coil (21), to obtain coded signal and to send to described Test Host (20);
The output terminal of described inductive coil (21) is connected to the input end of described signal processing module.
6. a kind of ground net corrosion situation proving installation based on wireless sensor network according to claim 5, it is characterized in that, described signal processing module comprises:
Filtering and amplifying circuit (22), the electromagnetic wave signal for being received by described inductive coil (21) carries out amplification and bandpass filtering;
Relevant testing circuit (23), for suppressing undesired signal;
Analog to digital conversion circuit (24), for converting simulating signal to digital signal;
The input end of described filtering and amplifying circuit (22) is connected to the output terminal of described inductive coil (21), the input end of described relevant testing circuit (23) is connected to the output terminal of described filtering and amplifying circuit (22), and the input end of analog-digital conversion circuit as described (24) is connected to the output terminal of described relevant testing circuit (23).
7. a kind of ground net corrosion situation proving installation based on wireless sensor network according to claim 1, it is characterized in that, described test module (20) has multiple, when testing grounded screen, described multiple test module (20) is arranged side by side the top ground surface in described grounded screen respectively.
8. a kind of ground net corrosion situation proving installation based on wireless sensor network according to claim 7, is characterized in that, described multiple test module (20) array that is square is arranged in the top ground surface of described grounded screen line by line.
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| CN201520967448.0U CN205139294U (en) | 2015-11-27 | 2015-11-27 | Ground net corrodes situation testing arrangement based on wireless sensor network |
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| CN201520967448.0U CN205139294U (en) | 2015-11-27 | 2015-11-27 | Ground net corrodes situation testing arrangement based on wireless sensor network |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110174593A (en) * | 2019-06-21 | 2019-08-27 | 三峡大学 | The apparatus and method of grounded screen breakpoint location are judged using electromagnetic induction |
| CN111289842A (en) * | 2020-03-23 | 2020-06-16 | 云南电网有限责任公司电力科学研究院 | Method for evaluating corrosion degree of grounding grid |
| CN113504432A (en) * | 2021-07-08 | 2021-10-15 | 广西电网有限责任公司电力科学研究院 | Transformer substation grounding grid monitoring system |
-
2015
- 2015-11-27 CN CN201520967448.0U patent/CN205139294U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110174593A (en) * | 2019-06-21 | 2019-08-27 | 三峡大学 | The apparatus and method of grounded screen breakpoint location are judged using electromagnetic induction |
| CN110174593B (en) * | 2019-06-21 | 2021-08-31 | 三峡大学 | Device and method for judging breakpoint position of grounding grid by adopting electromagnetic induction |
| CN111289842A (en) * | 2020-03-23 | 2020-06-16 | 云南电网有限责任公司电力科学研究院 | Method for evaluating corrosion degree of grounding grid |
| CN113504432A (en) * | 2021-07-08 | 2021-10-15 | 广西电网有限责任公司电力科学研究院 | Transformer substation grounding grid monitoring system |
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