CN203941236U - Stake resistance on-line monitoring instrument - Google Patents
Stake resistance on-line monitoring instrument Download PDFInfo
- Publication number
- CN203941236U CN203941236U CN201420258834.8U CN201420258834U CN203941236U CN 203941236 U CN203941236 U CN 203941236U CN 201420258834 U CN201420258834 U CN 201420258834U CN 203941236 U CN203941236 U CN 203941236U
- Authority
- CN
- China
- Prior art keywords
- circuit
- processing circuit
- signal
- core processing
- current transformer
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 238000012544 monitoring process Methods 0.000 title claims abstract description 32
- 238000012545 processing Methods 0.000 claims abstract description 62
- 238000005086 pumping Methods 0.000 claims abstract description 14
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 claims abstract description 9
- 229910052744 lithium Inorganic materials 0.000 claims abstract description 9
- 230000005856 abnormality Effects 0.000 claims abstract description 7
- 239000004973 liquid crystal related substance Substances 0.000 claims abstract description 7
- 238000001914 filtration Methods 0.000 claims description 9
- 229910052751 metal Inorganic materials 0.000 claims description 6
- 239000002184 metal Substances 0.000 claims description 6
- 239000004033 plastic Substances 0.000 claims description 6
- 229920003023 plastic Polymers 0.000 claims description 6
- 230000003321 amplification Effects 0.000 claims description 5
- 238000003199 nucleic acid amplification method Methods 0.000 claims description 5
- 229910000889 permalloy Inorganic materials 0.000 claims description 5
- 238000004080 punching Methods 0.000 claims description 3
- 230000035699 permeability Effects 0.000 claims 1
- 230000005540 biological transmission Effects 0.000 abstract description 2
- 238000010276 construction Methods 0.000 abstract description 2
- 238000000691 measurement method Methods 0.000 abstract description 2
- 238000005259 measurement Methods 0.000 description 10
- 238000000034 method Methods 0.000 description 6
- 239000004020 conductor Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 239000010949 copper Substances 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000013459 approach Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000001939 inductive effect Effects 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 230000001932 seasonal effect Effects 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
Landscapes
- Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)
Abstract
The utility model provides a kind of stake resistance on-line monitoring instrument, comprises lithium battery, solar panel, electric power management circuit, abnormality processing circuit, low-power consumption management circuit, button inputting circuits, liquid crystal display circuit, sound light alarming circuit, real time clock circuit, core processing circuit, pumping signal circuit, first group of current transformer, stake resistance loop, second group of current transformer, signal processing circuit, signal sample circuit, level shifting circuit, short message managing circuit, RS485 communicating circuit.Stake resistance on-line monitoring instrument of the present utility model provides a kind of new ground resistance measurement method, workable, construction volume is little, precision is higher, realize the continuous coverage of stake resistance, can monitor the life cycle management of earthing device, and realize remote online monitoring, be particularly useful for the status monitoring of the severe regional grounding resistance of transmission of unmanned and environment.
Description
Technical field
The utility model relates to a kind of stake resistance on-Line Monitor Device, and this device has adopted a kind of method of brand-new measurement of Grounding Resistance, and realizes the function of remote online monitoring by the multiple communication modes such as wired, wireless.
Background technology
According to DL/T 621 " ground connection of alternating-current electric device " requirement, in electric system, some conductive part of electric device, facility is answered ground connection.Ground connection, the part that electrical equipment must ground connection is done good being connected with ground.Ground connection comprises working earthing, protective ground, lightning protected ground connection and anti static grounding, and earthing device is directly connected to device security, personal safety and security of system.What so-called stake resistance referred to is exactly the resistance of earthing device.The variation of stake resistance directly has influence on the earthing effect of electrical equipment.
The practical approach of measurement of Grounding Resistance has megohmmeter measuring method and power current voltage method at present.Adopt megohmmeter measuring method need to arrange at the scene tens meters of above contact conductors, workload is very large; And adopt power current voltage method, require pressure-wire and electric current line should be as far as possible away from, otherwise the mutual inductance electromotive force that contains very large composition in the magnitude of voltage of measuring, to such an extent as to the result of measurement deviates from truth completely.
Due to antecedent soil moisture or the impact of seasonal variations such as freeze, stake resistance may all change in the four seasons.At present earthing device all requires to carry out regular inspection and maintenance, generally every half a year to one year repetition measurement once.There is certain drawback in this method, and the one, need special messenger's regular visit, cost is higher; The 2nd, unmanned ground region measurement difficulty is large; The 3rd, because repetition measurement interval time is longer, once erroneous judgement may bring more serious consequence.
Utility model content
Technical problem to be solved in the utility model is the grounding resistance measurement scheme that proposes a kind of workable, with low cost, on-line real time monitoring.
For solving the problems of the technologies described above, the utility model provides a kind of stake resistance on-line monitoring instrument, comprises lithium battery, solar panel, electric power management circuit, abnormality processing circuit, low-power consumption management circuit, button inputting circuits, liquid crystal display circuit, sound light alarming circuit, real time clock circuit, core processing circuit, pumping signal circuit, first group of current transformer, stake resistance loop, second group of current transformer, signal processing circuit, signal sample circuit, level shifting circuit, short message managing circuit, RS485 communicating circuit.
Core processing circuit is STM32F103RCT6 chip.
First group of current transformer, second group of current transformer are two groups of current transformers that structure is identical, and this current transformer is made up of metal shell, plastics protection inner casings (its outside surface of copper conductor coiling), permalloy magnetic core.
Pumping signal circuit, comprises high frequency signal generator, signal follow circuit and power amplification circuit.
Signal processing circuit, comprises signal one-level amplifying circuit, active filter circuit, signal second amplifying circuit, signal modulation and filtering circuit and precision rectifying filtering circuit.
Core processing circuit is connected with pumping signal circuit by analog to digital conversion interface, pumping signal circuit produces specific voltage signal and outputs to first group of current transformer, testing resistance loop punching is by first group of current transformer and second group of current transformer, second group of current transformer inductive coupling is to voltage signal and output to signal processing circuit, after signal processing circuit filter and amplification, output to signal sample circuit, signal sample circuit is connected with core processing circuit by digital-to-analog conversion interface.Core processing circuit calculates the numerical value of stake resistance according to this group output and input signal.
Level shifting circuit is Transistor-Transistor Logic level RS 232 level circuit.
Core processing circuit is connected with short message managing circuit by level shifting circuit, and short message managing circuit is received and dispatched note, realizes the on-line monitoring of wireless mode; Short message managing circuit can fixed-time short message sending, and short message content comprises grounding resistance and alarm condition; Short message managing circuit can receive short message, initiates a brand-new grounding resistance and measures, and postback short message, and short message content comprises current grounding resistance and alarm condition.
Core processing circuit is connected with RS485 communicating circuit, realizes the on-line monitoring of wired mode.
Lithium battery, solar panel are connected with electric power management circuit, and electric power management circuit is responsible for the management of solar panel to lithium cell charging, and electric power management circuit is responsible for the power supply management to core processing unit and other peripheral hardwares.
Abnormality processing circuit is connected with the reset circuit of core processing circuit, is responsible for the operation exception situation of monitoring core treatment circuit.
Low-power consumption management circuit is connected with the electric power loop of core processing circuit, is responsible for the operation power consumption situation of monitoring core treatment circuit, cuts off at the appropriate time relevant portion circuit to realize low power operation.
Button inputting circuits is connected with the GPIO mouth of core processing circuit, is convenient to arrange warning critical value.
Liquid crystal display circuit is connected with the SPI mouth of core processing circuit, the demonstration of relevant information while being convenient to show grounding resistance measurement value and setting operation.
Sound light alarming circuit is connected with the GPIO mouth of core processing circuit, and when grounding resistance measurement value is during higher than warning critical value, sound light alarming circuit is reported to the police by luminous and two kinds of modes of sounding.
Real time clock circuit is connected with core processing circuit, for recording the correct time of each measurement.Real time clock circuit carries button cell, the in the situation that of lithium battery power shortage, still can ensure within a certain period of time the normal operation of real time clock circuit.
The utlity model has positive effect: (1) stake resistance on-line monitoring of the present utility model instrument provides a kind of new ground resistance measurement method, and workable, construction volume is little, and precision is higher; (2) stake resistance on-line monitoring instrument of the present utility model can be grounded the continuous coverage of resistance, can monitor the life cycle management of earthing device; (3) stake resistance on-line monitoring instrument of the present utility model has been realized stake resistance remote monitoring function, is particularly useful for the status monitoring of the severe regional grounding resistance of transmission of unmanned and environment.
Brief description of the drawings
Fig. 1 is the stake resistance on-line monitoring instrument fundamental diagram of embodiment.
Fig. 2 is the current transformer structure figure of the stake resistance on-line monitoring instrument of embodiment.
Fig. 3 is the pumping signal schematic block circuit diagram of the stake resistance on-line monitoring instrument of embodiment.
Fig. 4 is the signal processing circuit theory diagram of the stake resistance on-line monitoring instrument of embodiment.
Embodiment
As shown in Figure 1, the stake resistance on-line monitoring instrument of the present embodiment, comprises lithium battery 1, solar panel 2, electric power management circuit 3, abnormality processing circuit 4, low-power consumption management circuit 5, button inputting circuits 6, liquid crystal display circuit 7, sound light alarming circuit 8, real time clock circuit 9, core processing circuit 10, pumping signal circuit 11, first group of current transformer 12, stake resistance loop 13, second group of current transformer 14, signal processing circuit 15, signal sample circuit 16, level shifting circuit 17, short message managing circuit 18, RS485 communicating circuit 19; The output terminal of lithium battery 1 and solar panel 2 is connected with the input end of electric power management circuit 3; The output terminal of electric power management circuit 3 is connected with the power end of core processing circuit 10; The output terminal of abnormality processing circuit 4 is connected with the resetting pin of core processing circuit 10; The output terminal of low-power consumption management 5 is connected with the electric power loop of core processing circuit 10; Button inputting circuits 6 is connected with the GPIO mouth of core processing circuit 10; Liquid crystal display circuit 7 is connected with the SPI mouth of core processing circuit 10; Sound light alarming circuit 8 is connected with the GPIO mouth of core processing circuit 10; Real time clock circuit 9 is connected with core processing circuit 10; The output terminal of core processing circuit 10 is connected with pumping signal circuit 11 input ends; Pumping signal circuit 11 output terminals are connected with the input end of first group of current transformer 12; Stake resistance loop 13 punchings are by first via current transformer 12 and No. second current transformer 14; The output terminal of No. second current transformer 14 is connected with the input end of signal processing circuit 15; The output terminal of signal processing circuit 15 is connected with the input end of signal sample circuit 16; The output terminal of signal sample circuit 16 is connected with the input end of core processing circuit 10; The serial ports output of core processing circuit 10 is connected with the input end of level shifting circuit 17; The output terminal of level shifting circuit 17 is connected with the input end of short message managing circuit 18; The serial ports output of core processing circuit 10 is connected with the input end of RS485 communicating circuit 19.
Core processing circuit (10) is STM32F103RCT6 chip.
As shown in Figure 2, the current transformer 12 of the stake resistance on-line monitoring instrument of the present embodiment, comprises metal shell 21, plastics protection inner casing 22, permalloy magnetic core 23, plastics protection inner casing 24, metal shell 25; Permalloy magnetic core 23 is included among plastics protection inner casing 22 and plastics protection inner casing 24, its outside surface of copper conductor coiling, and outermost layer is metal shell 21 and metal shell 25.
As shown in Figure 3, the pumping signal circuit 11 of the stake resistance on-line monitoring instrument of the present embodiment, comprises high frequency signal generator 26, signal follow circuit 27 and power amplification circuit 28; The output terminal of high frequency signal generator 26 is connected with the input end of signal follow circuit 27, and the output terminal of signal follow circuit 27 is connected with the input end of power amplification circuit 28.
As shown in Figure 4, the signal processing circuit 15 of the stake resistance on-line monitoring instrument of the present embodiment, comprises signal one-level amplifying circuit 29, active filter circuit 30, signal second amplifying circuit 31, signal modulation and filtering circuit 32 and precision rectifying filtering circuit 33; The output terminal of signal one-level amplifying circuit 29 is connected with the input end of active filter circuit 30, the output terminal of active filter circuit 30 is connected with the input end of signal second amplifying circuit 31, the output terminal of signal second amplifying circuit 31 is connected with the input end of signal modulation and filtering circuit 32, and the output terminal of signal modulation and filtering circuit 32 is connected with the input end of precision rectifying filtering circuit 33.
Level shifting circuit (17) is Transistor-Transistor Logic level RS 232 level circuit.
Claims (6)
1. stake resistance on-line monitoring instrument, it is characterized in that, comprise lithium battery (1), solar panel (2), electric power management circuit (3), abnormality processing circuit (4), low-power consumption management circuit (5), button inputting circuits (6), liquid crystal display circuit (7), sound light alarming circuit (8), real time clock circuit (9), core processing circuit (10), pumping signal circuit (11), first group of current transformer (12), stake resistance loop (13), second group of current transformer (14), signal processing circuit (15), signal sample circuit (16), level shifting circuit (17), short message managing circuit (18), RS485 communicating circuit (19), lithium battery (1) is connected with electric power management circuit (3) input end with solar panel (2) output terminal, electric power management circuit (3) output terminal is connected with core processing circuit (10) power end, abnormality processing circuit (4) output terminal is connected with core processing circuit (10) resetting pin, the output terminal of low-power consumption management (5) is connected with core processing circuit (10) electric power loop, button inputting circuits (6) is connected with core processing circuit (10) GPI0 mouth, liquid crystal display circuit (7) is connected with core processing circuit (10) SPI mouth, sound light alarming circuit (8) is connected with core processing circuit (10) GPI0 mouth, real time clock circuit (9) is connected with core processing circuit (10), core processing circuit (10) output terminal is connected with pumping signal circuit (11) input end, pumping signal circuit (11) output terminal is connected with first group of current transformer (12) input end, stake resistance loop (13) punching is by first via current transformer (12) and No. second current transformer (14), No. second current transformer (14) output terminal is connected with signal processing circuit (15) input end, signal processing circuit (15) output terminal is connected with signal sample circuit (16) input end, signal sample circuit (16) output terminal is connected with core processing circuit (10) input end, the output of core processing circuit (10) serial ports is connected with level shifting circuit (17) input end, level shifting circuit (17) output terminal is connected with short message managing circuit (18) input end, the output of core processing circuit (10) serial ports is connected with RS485 communicating circuit (19) input end.
2. stake resistance on-line monitoring instrument as claimed in claim 1, is characterized in that, core processing circuit (10) is STM32F103RCT6 chip.
3. stake resistance on-line monitoring instrument as claimed in claim 1; it is characterized in that; first group of current transformer (12) and second group of current transformer (14), for adopting the current transformer that high magnetic permeability permalloy is magnetic core, comprise metal shell, plastics protection inner casing and permalloy magnetic core.
4. stake resistance on-line monitoring instrument as claimed in claim 1, it is characterized in that, pumping signal circuit (11) comprises high frequency signal generator (26), signal follow circuit (27) and power amplification circuit (28).
5. stake resistance on-line monitoring instrument as claimed in claim 1, it is characterized in that, signal processing circuit (15) comprises signal one-level amplifying circuit (29), active filter circuit (30), signal second amplifying circuit (31), signal modulation and filtering circuit (32) and precision rectifying filtering circuit (33).
6. stake resistance on-line monitoring instrument as claimed in claim 1, is characterized in that, level shifting circuit (17) is Transistor-Transistor Logic level RS 232 level circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420258834.8U CN203941236U (en) | 2014-05-15 | 2014-05-15 | Stake resistance on-line monitoring instrument |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420258834.8U CN203941236U (en) | 2014-05-15 | 2014-05-15 | Stake resistance on-line monitoring instrument |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203941236U true CN203941236U (en) | 2014-11-12 |
Family
ID=51860539
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420258834.8U Expired - Lifetime CN203941236U (en) | 2014-05-15 | 2014-05-15 | Stake resistance on-line monitoring instrument |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203941236U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105092981A (en) * | 2014-05-15 | 2015-11-25 | 常州帕斯菲克自动化技术股份有限公司 | Grounding resistor on-line monitor |
| CN109801482A (en) * | 2017-11-17 | 2019-05-24 | 苏州格联威智能科技有限公司 | Internet of Things ground monitor based on ZigBee technology |
-
2014
- 2014-05-15 CN CN201420258834.8U patent/CN203941236U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105092981A (en) * | 2014-05-15 | 2015-11-25 | 常州帕斯菲克自动化技术股份有限公司 | Grounding resistor on-line monitor |
| CN109801482A (en) * | 2017-11-17 | 2019-05-24 | 苏州格联威智能科技有限公司 | Internet of Things ground monitor based on ZigBee technology |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US9823289B2 (en) | Automated digital earth fault system | |
| US20160169959A1 (en) | System, method, and apparatus for remotely monitoring surge arrester conditions | |
| CN107132445A (en) | A kind of AC/DC arrester real time on-line monitoring device | |
| CN105158543A (en) | Acquisition unit for leak current of ultra high voltage direct-current arrester based on two Hall elements | |
| CN105182044A (en) | Ultrahigh voltage DC arrester state detection device with Hall sensor acting as framework | |
| CN208596190U (en) | The arrester on-line monitoring system of tape counter | |
| CN105182163A (en) | Ultrahigh voltage DC arrester leakage current online detection system based on cloud technology | |
| CN206832917U (en) | A kind of AC/DC arrester on-Line Monitor Device | |
| CN203941236U (en) | Stake resistance on-line monitoring instrument | |
| CN201821169U (en) | Wireless temperature terminal and self-acquisition power supply device | |
| CN105092981A (en) | Grounding resistor on-line monitor | |
| CN205103292U (en) | Acquisition unit based on two hall element reveal electric current to special high voltage direct current arrester | |
| CN103592586A (en) | Power cable insulation monitoring system | |
| CN201623479U (en) | Surge protector having wireless networking and automatic alarm function | |
| CN105758554A (en) | Power transmission line temperature online monitoring system and method, and application | |
| CN103163371A (en) | Portable detector for high-voltage transmission line harmonic waves | |
| CN203310903U (en) | Transformer iron core earth current online monitor | |
| CN203444465U (en) | Integrated intelligent monitoring system of wire | |
| CN105301323A (en) | Ultrahigh voltage DC lightning arrester leakage current online detection method by using cloud technology | |
| CN208753985U (en) | Intelligent lightning protection device and the lightning protection box for protecting three-phase circuit | |
| CN105467197A (en) | Online monitoring device of integrated lightning arrester | |
| CN208270706U (en) | The insulation detection device and manned underwater vehicle of manned underwater vehicle | |
| CN102759681A (en) | Transformer core ground fault monitoring device | |
| CN205103294U (en) | Use device that hall sensor detected special high voltage direct current arrester state as framework | |
| CN103576056A (en) | System for monitoring operating state of electric transmission line |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20141112 |
|
| CX01 | Expiry of patent term |