CN206756926U - A kind of Detector for Stray Currents - Google Patents
A kind of Detector for Stray Currents Download PDFInfo
- Publication number
- CN206756926U CN206756926U CN201720558140.XU CN201720558140U CN206756926U CN 206756926 U CN206756926 U CN 206756926U CN 201720558140 U CN201720558140 U CN 201720558140U CN 206756926 U CN206756926 U CN 206756926U
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- Prior art keywords
- resistance
- electric capacity
- operational amplifier
- main frame
- dsp processor
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Abstract
The utility model discloses a kind of Detector for Stray Currents, including detecting main frame, detection main frame front end is provided with display screen, detection main frame side is provided with data transmission interface, detection main frame inner chamber is provided with master control borad, master control borad is provided with DSP Processor, data storage, current signal amplification module, display module and wireless transport module, HF current transformer on current signal amplification module connection power cable, HF current transformer connects signal transmitter unit by pulse trigger, signal transmitter unit connects DSP Processor, the utility model structural principle is simple, it can effectively gather and position stray electrical current source, and faint stray electrical current signal can be amplified, improve detection efficiency.
Description
Technical field
Stray electrical current detection technique field is the utility model is related to, specially a kind of Detector for Stray Currents.
Background technology
Stray electrical current refers mainly to the electric current not moved according to regulation approach, and it is present in soil, with needing to be protected set
Standby system does not associate.This stray electrical current in soil can enter pipeline by a certain position of pipeline, and move in the duct
Returned to after a dynamic segment distance in soil being left from pipeline, the place that these electric currents leave pipeline will corrode, also because
This is referred to as stray current corrosion.The output point of stray electrical current, which has, much includes impressed current cathodic protection system, DC electric cars
System, DC opens a mine and welding system, high pressure DC, AC transmission line.Stray electrical current has point of dynamic and static state, changes over time
Size or direction for dynamic stray electric current, do not change for static stray electrical current.Enter the portion of pipeline in stray electrical current
Point, pipeline is protected for negative electrode, but excessive electric current enters fashionable, and overprotection will occur for this section of tubing.It is simultaneously miscellaneous
The place that scattered electric current leaves pipeline will corrode because electronics is lost.Determine whether pipeline has been subjected to the dry of stray electrical current
Disturb, can relatively be judged with historical data by detecting the change of pipeline current potential.
In the prior art, stray current collection apparatus just passes through the electric signal after corresponding electric signal is collected
RS485 interfaces are sent to background system and are stored and analyzed, and stray current detecting device is only able to detect in the prior art
Part stray electrical current, faint stray electrical current signal can not be amplified and stray electrical current source is positioned, detection efficiency is low.
Utility model content
The purpose of this utility model is to provide a kind of Detector for Stray Currents, to solve what is proposed in above-mentioned background technology
Problem.
To achieve the above object, the utility model provides following technical scheme：A kind of Detector for Stray Currents, including detection
Main frame, the detection main frame front end are provided with display screen, and the detection main frame side is provided with data transmission interface, the detection main frame
Inner chamber is provided with master control borad, and the master control borad is provided with DSP Processor, data storage, current signal amplification module, display module
And wireless transport module, the current signal amplification module input connects the HF current transformer on power cable, defeated
Go out end connection DSP Processor, the HF current transformer connects signal transmitter unit, the signal hair by pulse trigger
Unit connection DSP Processor is penetrated, the DSP Processor connects data storage, display module respectively, and the DSP Processor leads to
Cross wireless transport module connection remote monitoring terminal.
Preferably, the current signal amplification module includes operational amplifier A, operational amplifier B and operational amplifier C,
The operational amplifier A negative input connects resistance A one end, resistance B one end, resistance C one end and resistance D one end respectively, bears
Pole input is grounded by resistance E, and it is another that output end connects the resistance C other ends, electric capacity A one end and resistance F one end, resistance B respectively
One end connects the electric capacity A other ends, resistance F other end concatenation operation amplifier B electrode input ends, the operational amplifier B negative poles
Input connects resistance G one end, resistance H one end, resistance I one end, resistance J one end and electric capacity C one end, the operation amplifier respectively
Device B output ends connect the resistance J other ends, the electric capacity C other ends, electric capacity B one end and resistance K one end, the connection of the resistance I other ends respectively
The electric capacity B other ends.
Preferably, the operational amplifier C electrode input ends connect resistance L one end, electric capacity D one end, resistance N mono- respectively
End, negative input connect resistance M one end, resistance O one end and electric capacity E one end, the operational amplifier C output ends difference respectively
Connect the resistance A other ends, the resistance M other ends and the electric capacity E other ends, resistance O other ends ground connection, resistance L other ends connection electric capacity D
The other end is simultaneously grounded, and the resistance N other ends connect the resistance P being connected in parallel, resistance Q, resistance R, resistance S and are grounded.
Preferably, the DSP Processor uses DSP2812 chips.
Compared with prior art, the beneficial effects of the utility model are：
(1) the utility model structural principle is simple, wherein, pulse trigger, signal transmitter unit are mutual by high frequency electric
Sensor is coupled with power cable, is received local discharge signal and reflection echo in the near-end of tested power cable, is passed through two
Person's reaches the time, determines the position in the stray electrical current source of power cable, can effectively gather and position stray electrical current source.
(2) the current signal amplification module that the utility model uses can be amplified to faint stray electrical current signal,
Substantially increase response speed, smaller steady-state error；Effectively increase the antijamming capability of analog signal；Improve detection effect
Rate.
Brief description of the drawings
Fig. 1 is the utility model overall structure diagram；
Fig. 2 is the utility model control principle structure chart；
Fig. 3 is the utility model current signal amplification module schematic diagram.
Embodiment
Below in conjunction with the accompanying drawing in the utility model embodiment, the technical scheme in the embodiment of the utility model is carried out
Clearly and completely describing, it is clear that described embodiment is only the utility model part of the embodiment, rather than whole
Embodiment.Based on the embodiment in the utility model, those of ordinary skill in the art are not under the premise of creative work is made
The every other embodiment obtained, belong to the scope of the utility model protection.
Fig. 1-3 are referred to, the utility model provides a kind of technical scheme：A kind of Detector for Stray Currents, including detection master
Machine 1, detection main frame 1 front end are provided with display screen 2, and detection main frame 1 side is provided with data transmission interface 3, the detection
The inner chamber of main frame 1 is provided with master control borad 4, and the master control borad 4 is provided with DSP Processor 5, data storage 6, current signal amplification module
7th, display module 8 and wireless transport module 9, DSP Processor 5 use DSP2812 chips；The current signal amplification module 7
HF current transformer 10 on input connection power cable, output end connection DSP Processor 5, the high frequency electric mutual inductance
Device 10 connects signal transmitter unit 12 by pulse trigger 11, and the signal transmitter unit 12 connects DSP Processor 5, described
DSP Processor 5 connects data storage 6, display module 8 respectively, and the DSP Processor 5 is connected far by wireless transport module 9
Range monitoring terminal 13.The utility model structural principle is simple, wherein, pulse trigger, signal transmitter unit, pass through high frequency electric
Transformer is coupled with power cable, is received local discharge signal and reflection echo in the near-end of tested power cable, is passed through
Both positions for reaching the time, determining the stray electrical current source of power cable, can effectively gather and position stray electrical current source.
In the utility model, current signal amplification module 7 is put including operational amplifier A 1c, operational amplifier B2c and computing
Big device C3c, the operational amplifier A 1c negative inputs connect resistance A1a one end, resistance B2a one end, resistance C3a mono- respectively
End and resistance D4a one end, negative input are grounded by resistance E5a, and output end connects the resistance C3a other ends, electric capacity A1b respectively
One end and resistance F6a one end, the resistance B2a other ends connection electric capacity A1b other ends, resistance F6a other end concatenation operation amplifiers
B2c electrode input ends, the operational amplifier B2c negative inputs connect resistance G7a one end, resistance H8a one end, resistance respectively
I9a one end, resistance J10a one end and electric capacity C3b one end, it is another that the operational amplifier B2c output ends connect resistance J10a respectively
End, the electric capacity C3b other ends, electric capacity B2b one end and resistance K11a one end, the resistance I9a other ends connection electric capacity B2b other ends；Fortune
Calculate amplifier C3c electrode input ends and connect resistance L12a one end, electric capacity D4b one end, resistance N14a one end, negative input respectively
Resistance M13a one end, resistance O15a one end and electric capacity E5b one end, the operational amplifier C3c output ends is connected respectively respectively to connect
The connecting resistance A1a other ends, the resistance M13a other ends and the electric capacity E5b other ends, resistance O15a other ends ground connection, resistance L12a are another
The end connection electric capacity D4b other ends are simultaneously grounded, resistance P16a, resistance Q17a, the resistance that the connection of the resistance N14a other ends is connected in parallel
R18a, resistance S19a are simultaneously grounded.The current signal amplification module that the utility model uses can be to faint stray electrical current signal
It is amplified, substantially increases response speed, smaller steady-state error；First row transmits again after low level signal amplification, it is possible to very
Solves the anti-interference requirement of signal well；Effectively increase the antijamming capability of analog signal；Improve detection efficiency.
While there has been shown and described that embodiment of the present utility model, for the ordinary skill in the art,
It is appreciated that these embodiments can be carried out with a variety of changes in the case where not departing from principle of the present utility model and spirit, repaiied
Change, replace and modification, the scope of the utility model are defined by the appended claims and the equivalents thereof.
Claims (4)
1. a kind of Detector for Stray Currents, including detection main frame (1), it is characterised in that：Described detection main frame (1) front end is provided with aobvious
Display screen (2), described detection main frame (1) side are provided with data transmission interface (3), and described detection main frame (1) inner chamber is provided with master control borad
(4), the master control borad (4) is provided with DSP Processor (5), data storage (6), current signal amplification module (7), display mould
Block (8) and wireless transport module (9), current signal amplification module (7) input connect the high-frequency electrical on power cable
Current transformer (10), output end connection DSP Processor (5), the HF current transformer (10) pass through pulse trigger (11)
Connect signal transmitter unit (12), signal transmitter unit (12) the connection DSP Processor (5), the DSP Processor (5) point
Not Lian Jie data storage (6), display module (8), the DSP Processor (5) passes through the long-range prison of wireless transport module (9) connection
Control terminal (13).
A kind of 2. Detector for Stray Currents according to claim 1, it is characterised in that：The current signal amplification module
(7) operational amplifier A (1c), operational amplifier B (2c) and operational amplifier C (3c) are included, the operational amplifier A (1c) is negative
Pole input connects resistance A (1a) one end, resistance B (2a) one end, resistance C (3a) one end and resistance D (4a) one end, negative pole respectively
Input is grounded by resistance E (5a), and output end connects resistance C (3a) other end, electric capacity A (1b) one end and resistance F respectively
(6a) one end, resistance B (2a) other end connection electric capacity A (1b) other end, resistance F (6a) other end concatenation operation amplifier B
(2c) electrode input end, operational amplifier B (2c) negative input connect resistance G (7a) one end, resistance H (8a) one respectively
End, resistance I (9a) one end, resistance J (10a) one end and electric capacity C (3b) one end, operational amplifier B (2c) the output end difference
Connect resistance J (10a) other end, electric capacity C (3b) other end, electric capacity B (2b) one end and resistance K (11a) one end, resistance I (9a)
The other end connects electric capacity B (2b) other end.
A kind of 3. Detector for Stray Currents according to claim 2, it is characterised in that：The operational amplifier C (3c) is just
Pole input connects resistance L (12a) one end, electric capacity D (4b) one end, resistance N (14a) one end respectively, and negative input connects respectively
Connecting resistance M (13a) one end, (15a) one end of resistance 0 and electric capacity E (5b) one end, operational amplifier C (3c) the output end difference
Connect resistance A (1a) other end, resistance M (13a) other ends and electric capacity E (5b) other end, resistance 0 (15a) other end ground connection, electricity
Resistance L (12a) other end connection electric capacity D (4b) other ends are simultaneously grounded, the resistance P that the connection of resistance N (14a) other end is connected in parallel
(16a), resistance Q (17a), resistance R (18a), resistance S (19a) are simultaneously grounded.
A kind of 4. Detector for Stray Currents according to claim 1, it is characterised in that：The DSP Processor (5) uses
DSP2812 chips.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720558140.XU CN206756926U (en) | 2017-05-19 | 2017-05-19 | A kind of Detector for Stray Currents |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720558140.XU CN206756926U (en) | 2017-05-19 | 2017-05-19 | A kind of Detector for Stray Currents |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206756926U true CN206756926U (en) | 2017-12-15 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720558140.XU Expired - Fee Related CN206756926U (en) | 2017-05-19 | 2017-05-19 | A kind of Detector for Stray Currents |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206756926U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107995752A (en) * | 2018-01-05 | 2018-05-04 | 江苏恒鹏电气集团有限公司 | It is a kind of to detect lamp stand principal current, leakage current, the detection device of water logging at the same time |
| CN108548946A (en) * | 2018-06-27 | 2018-09-18 | 广州发展集团股份有限公司 | Stray electrical current simulator |
| CN110749772A (en) * | 2019-10-27 | 2020-02-04 | 徐州和纬信电科技有限公司 | Mine stray current detector |
| CN115436734A (en) * | 2022-09-15 | 2022-12-06 | 国网上海市电力公司 | Positioning method of underground stray current source |
-
2017
- 2017-05-19 CN CN201720558140.XU patent/CN206756926U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107995752A (en) * | 2018-01-05 | 2018-05-04 | 江苏恒鹏电气集团有限公司 | It is a kind of to detect lamp stand principal current, leakage current, the detection device of water logging at the same time |
| CN108548946A (en) * | 2018-06-27 | 2018-09-18 | 广州发展集团股份有限公司 | Stray electrical current simulator |
| CN108548946B (en) * | 2018-06-27 | 2023-09-05 | 广州发展集团股份有限公司 | Stray Current Simulator |
| CN110749772A (en) * | 2019-10-27 | 2020-02-04 | 徐州和纬信电科技有限公司 | Mine stray current detector |
| CN115436734A (en) * | 2022-09-15 | 2022-12-06 | 国网上海市电力公司 | Positioning method of underground stray current source |
| CN115436734B (en) * | 2022-09-15 | 2024-06-11 | 国网上海市电力公司 | Positioning method of underground stray current source |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20171215 Termination date: 20180519 |