CN205594111U - Leakage detection appearance based on rogowski coil - Google Patents
Leakage detection appearance based on rogowski coil Download PDFInfo
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- CN205594111U CN205594111U CN201620258593.6U CN201620258593U CN205594111U CN 205594111 U CN205594111 U CN 205594111U CN 201620258593 U CN201620258593 U CN 201620258593U CN 205594111 U CN205594111 U CN 205594111U
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- rogowski coil
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- 230000009977 dual effect Effects 0.000 abstract 3
- 239000004973 liquid crystal related substance Substances 0.000 abstract 1
- 238000011897 real-time detection Methods 0.000 abstract 1
- 230000006698 induction Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000005674 electromagnetic induction Effects 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 230000032683 aging Effects 0.000 description 1
- 230000003321 amplification Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
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- 230000001681 protective effect Effects 0.000 description 1
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Abstract
The utility model relates to a leakage detection appearance based on rogowski coil belongs to electronic instrument technical field. The utility model discloses a rogowski coil, rectifier bridge, voltage follower, second order filter, dual -stage amplifier, display module, rogowski coil, rectifier bridge, voltage follower, second order filter, dual -stage amplifier, display module order are consecutive, the rectifier bridge comprises diode D1, D2, D3, D4, voltage follower comprises resistance R1, R2 and operational amplifier A1, and the second order filter comprises resistance R3, R4, electric capacity C1, C2, and the dual -stage amplifier comprises operational amplifier A2, A3, resistance R5, R6, R7, R8, R9, R10, the display module comprises MCU treater and LCD liquid crystal display module. The utility model discloses but whether the real -time detection electric wire has the electric leakage condition, can show the electric leakage size, easy operation, practical convenience through the display module.
Description
Technical field
This utility model relates to a kind of leakage detector based on Rogowski coil, belongs to electronic instrument technology field.
Background technology
At present, earth leakage circuit-breaker technology is the most ripe, and civil electric wire road is assembled with earth leakage circuit-breaker.Using the time long however as circuit, the insulation of circuit is the most aging, decreasing insulating, produces the biggest leakage current, causes earth leakage circuit-breaker action, it is therefore necessary to detects electric line and change circuit.Scheme currently for detection of electrical leakage is a lot, but Comparison between detecting methods is complicated, causes expensive, detection inconvenience etc..Electromagnetic induction coil or the earth detector of current sensor sensing electric leakage is used although also having, but the sensing capability of electromagnetic induction coil and current sensor is the strongest, this method error is bigger, if little may result in of leakage current can not be detected, therefore, detection of electrical leakage technology is also needed to continue to improve.
Summary of the invention
The technical problems to be solved in the utility model is to provide a kind of leakage detector based on Rogowski coil, by display module, electric wire on-line checking can be shown leakage current.
Technical solutions of the utility model are: a kind of leakage detector based on Rogowski coil, including Rogowski coil 1, rectifier bridge 2, voltage follower 3, second order filter 4, dual-stage amplifier 5, display module 6；Described Rogowski coil 1, rectifier bridge 2, voltage follower 3, second order filter 4, dual-stage amplifier 5, display module 6 order is sequentially connected.
Described Rogowski coil 1 is pincerlike, and Rogowski coil 1 one end is connected with the negative pole of diode D1, D2 of rectifier bridge 2, and the other end is connected with the positive pole of diode D3, D4；Rectifier bridge 2 is made up of diode D1, D2, D3, D4, the plus earth of diode D1, D2；Voltage follower 3 is made up of resistance R1, R2 and operational amplifier A 1, resistance R1 one end is connected with the in-phase input end of operational amplifier A 1, the resistance R1 other end is connected with diode D3, D4 negative pole of rectifier bridge 2, resistance R2 one end is connected with the inverting input of operational amplifier A 1, and the other end is connected with the outfan of operational amplifier A 1；Second order filter 4 is made up of resistance R3, R4, electric capacity C1, C2, resistance R3 one end is connected with the outfan of the operational amplifier A 1 of voltage follower 3, the other end is connected with electric capacity C1 and resistance R4, electric capacity C1 other end ground connection, the other end of resistance R4 is connected with the in-phase input end of the operational amplifier A 2 of electric capacity C2 and dual-stage amplifier 5, the other end ground connection of electric capacity C2；Dual-stage amplifier 5 is by operational amplifier A 2 and A3, resistance R5, R6, R7, R8, R9, R10 forms, resistance R5 one end and the inverting input of operational amplifier A 2, resistance R5 other end ground connection, resistance R6 one end is connected with the in-phase input end of operational amplifier A 2, the resistance R6 other end is connected with outfan and the resistance R7 of operational amplifier A 2, the other end of resistance R7 is connected with the input in the same direction of resistance R9 and operational amplifier A 3, resistance R8 one end and the inverting input of operational amplifier A 3, resistance R8 other end ground connection, the resistance R9 other end is connected with outfan and the resistance R10 of operational amplifier A 3, the resistance R10 other end is connected with the AD mouth of the MCU processor of display module 6；Display module is constituted LCD LCD MODULE by MCU processor with LCD LCD MODULE and is connected with the I/O mouth of MCU processor.
Operation principle of the present utility model is: Rogowski coil 1 be enclosed within the electric wire of required measurement, after Rogowski coil 1 senses electric leakage, produce an induction electromotive force, filter radio-frequency component after rectified bridge 2, voltage follower 3, second order filter 4 and dual-stage amplifier 5 and obtain a galvanic current pressure signal, pass to the AD mouth of the MCU processor of display module 6, the size of LCD LCD MODULE display electrical leakage quantity.
Use process of the present utility model is:
The first step: Rogowski coil 1 is enclosed within the electric wire of required measurement；
Second step: after Rogowski coil 1 senses electric leakage, produces an induction electromotive force；
3rd step: this induction electromotive force obtains a d. c. voltage signal containing high-frequency harmonic through rectifier bridge 2 rectification；
4th step: this d. c. voltage signal filters radio-frequency component through second order filter 3 and obtains a galvanic current pressure signal；
5th step: this galvanic current pressure signal is amplified by dual-stage amplifier 5, the signal after amplification passes to the AD mouth of the MCU processor of display module 6, the size of LCD LCD MODULE display electrical leakage quantity.
The beneficial effects of the utility model are:
(1) whether can leak electricity by on-line checking electric wire, and display module can show size, in order to people make corresponding protective measure；
(2) simple to operate, practical and convenient.
Accompanying drawing explanation
Fig. 1 is circuit structure block diagram of the present utility model.
Each label in figure: 1-induction coil, 2-rectifier bridge, 3-voltage follower, 4-second order filter, 5-difference amplifier, 6-display module；H-Rogowski coil, R1, R2, R3, R4, R5, R6, R7, R8, R9, R10-resistance, C1, C2-electric capacity, A1, A2, A3-operational amplifier, D1, D2, D3, D4-diode, MCU-processor, LCD-LCD MODULE.
Detailed description of the invention
Below in conjunction with the accompanying drawings and specific embodiment, the utility model is described in further detail.
Embodiment 1: as it is shown in figure 1, a kind of leakage detector based on Rogowski coil, including Rogowski coil (1), rectifier bridge (2), voltage follower (3), second order filter (4), dual-stage amplifier (5), display module (6)；Described Rogowski coil (1), rectifier bridge (2), voltage follower (3), second order filter (4), dual-stage amplifier (5), display module (6) order is sequentially connected.
Described Rogowski coil (1) is pincerlike, and Rogowski coil (1) one end is connected with the negative pole of diode D1, D2 of rectifier bridge (2), and the other end is connected with the positive pole of diode D3, D4；Rectifier bridge (2) is made up of diode D1, D2, D3, D4, the plus earth of diode D1, D2；Voltage follower (3) is made up of resistance R1, R2 and operational amplifier A 1, resistance R1 one end is connected with the in-phase input end of operational amplifier A 1, the resistance R1 other end is connected with diode D3, D4 negative pole of rectifier bridge (2), resistance R2 one end is connected with the inverting input of operational amplifier A 1, and the other end is connected with the outfan of operational amplifier A 1；Second order filter (4) is made up of resistance R3, R4, electric capacity C1, C2, resistance R3 one end is connected with the outfan of the operational amplifier A 1 of voltage follower (3), the other end is connected with electric capacity C1 and resistance R4, electric capacity C1 other end ground connection, the other end of resistance R4 is connected with the in-phase input end of electric capacity C2 and the operational amplifier A 2 of dual-stage amplifier (5), the other end ground connection of electric capacity C2；Dual-stage amplifier (5) is by operational amplifier A 2 and A3, resistance R5, R6, R7, R8, R9, R10 forms, resistance R5 one end and the inverting input of operational amplifier A 2, resistance R5 other end ground connection, resistance R6 one end is connected with the in-phase input end of operational amplifier A 2, the resistance R6 other end is connected with outfan and the resistance R7 of operational amplifier A 2, the other end of resistance R7 is connected with the input in the same direction of resistance R9 and operational amplifier A 3, resistance R8 one end and the inverting input of operational amplifier A 3, resistance R8 other end ground connection, the resistance R9 other end is connected with outfan and the resistance R10 of operational amplifier A 3, the resistance R10 other end is connected with the AD mouth of the MCU processor of display module (6)；Display module is constituted LCD LCD MODULE by MCU processor with LCD LCD MODULE and is connected with the I/O mouth of MCU processor.
Above in conjunction with accompanying drawing, specific embodiment of the utility model is explained in detail, but this utility model is not limited to above-described embodiment, in the ken that those of ordinary skill in the art are possessed, it is also possible on the premise of without departing from this utility model objective, various changes can be made.
Claims (1)
1. a leakage detector based on Rogowski coil, it is characterised in that: include Rogowski coil (1), rectifier bridge (2), voltage follower (3), second order filter (4), dual-stage amplifier (5), display module (6)；Described Rogowski coil (1), rectifier bridge (2), voltage follower (3), second order filter (4), dual-stage amplifier (5), display module (6) order is sequentially connected；
Described Rogowski coil (1) is pincerlike, and Rogowski coil (1) one end is connected with the negative pole of diode D1, D2 of rectifier bridge (2), and the other end is connected with the positive pole of diode D3, D4；Rectifier bridge (2) is made up of diode D1, D2, D3, D4, the plus earth of diode D1, D2；Voltage follower (3) is made up of resistance R1, R2 and operational amplifier A 1, resistance R1 one end is connected with the in-phase input end of operational amplifier A 1, the resistance R1 other end is connected with diode D3, D4 negative pole of rectifier bridge (2), resistance R2 one end is connected with the inverting input of operational amplifier A 1, and the other end is connected with the outfan of operational amplifier A 1；Second order filter (4) is made up of resistance R3, R4, electric capacity C1, C2, resistance R3 one end is connected with the outfan of the operational amplifier A 1 of voltage follower (3), the other end is connected with electric capacity C1 and resistance R4, electric capacity C1 other end ground connection, the other end of resistance R4 is connected with the in-phase input end of electric capacity C2 and the operational amplifier A 2 of dual-stage amplifier (5), the other end ground connection of electric capacity C2；Dual-stage amplifier (5) is by operational amplifier A 2 and A3, resistance R5, R6, R7, R8, R9, R10 forms, resistance R5 one end and the inverting input of operational amplifier A 2, resistance R5 other end ground connection, resistance R6 one end is connected with the in-phase input end of operational amplifier A 2, the resistance R6 other end is connected with outfan and the resistance R7 of operational amplifier A 2, the other end of resistance R7 is connected with the input in the same direction of resistance R9 and operational amplifier A 3, resistance R8 one end and the inverting input of operational amplifier A 3, resistance R8 other end ground connection, the resistance R9 other end is connected with outfan and the resistance R10 of operational amplifier A 3, the resistance R10 other end is connected with the AD mouth of the MCU processor of display module (6)；Display module is constituted LCD LCD MODULE by MCU processor with LCD LCD MODULE and is connected with the I/O mouth of MCU processor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620258593.6U CN205594111U (en) | 2016-03-31 | 2016-03-31 | Leakage detection appearance based on rogowski coil |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620258593.6U CN205594111U (en) | 2016-03-31 | 2016-03-31 | Leakage detection appearance based on rogowski coil |
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| CN205594111U true CN205594111U (en) | 2016-09-21 |
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| CN201620258593.6U Expired - Fee Related CN205594111U (en) | 2016-03-31 | 2016-03-31 | Leakage detection appearance based on rogowski coil |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111190127A (en) * | 2020-01-10 | 2020-05-22 | 长沙理工大学 | Non-contact live working safety detection method and device based on magnetic induction |
| CN111525493A (en) * | 2020-04-07 | 2020-08-11 | 温州大学 | Thing networking intelligent circuit breaker based on WIFI mode |
-
2016
- 2016-03-31 CN CN201620258593.6U patent/CN205594111U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111190127A (en) * | 2020-01-10 | 2020-05-22 | 长沙理工大学 | Non-contact live working safety detection method and device based on magnetic induction |
| CN111525493A (en) * | 2020-04-07 | 2020-08-11 | 温州大学 | Thing networking intelligent circuit breaker based on WIFI mode |
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| C14 | Grant of patent or utility model | ||
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| 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: 20160921 Termination date: 20180331 |