CN204028283U - A kind of novel fault arc detection device - Google Patents
A kind of novel fault arc detection device Download PDFInfo
- Publication number
- CN204028283U CN204028283U CN201420289385.3U CN201420289385U CN204028283U CN 204028283 U CN204028283 U CN 204028283U CN 201420289385 U CN201420289385 U CN 201420289385U CN 204028283 U CN204028283 U CN 204028283U
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- chip microcomputer
- module
- rectification
- pass filtering
- 50khz
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Abstract
A novel fault arc detection device, comprises 50kHz Butterworth high-pass filtering module, rectification module and single-chip microcomputer identification module.In the time having fault electric arc to produce, fault electric arc electric current is that after the Butterworth high-pass filtering module of described 50kHz, low frequency signal is all filtered out by a cutoff frequency, is now left the observation of high-frequency signal oscillograph and can finds the burst pulse that many positive-negative half-cycle all have.Because its amplitude is very little and single-chip microcomputer None-identified negative voltage, so need pulse signals to amplify and rectification.In described high-pass filtering link, high-frequency signal is amplified to the scope that single-chip microcomputer can be identified, be DC pulse signal through described rectification module by alternating-current pulse signal rectification, whether the external interrupt mouth that DC pulse signal is input to described single-chip microcomputer identification module by comparer, judge whether to produce fault electric arc by the generation of external interrupt.
Description
Technical field
The utility model belongs to fault detection technique field, relates to a kind of novel fault arc detection device.
Background technology
Fault electric arc discharge process can be accompanied by light, heat, sound and electromagnetic radiation etc.Based on above characteristic, common fault arc detection method is to detect by corresponding sensor is set near arcing point the physical characteristics such as heat, electromagnetic radiation and noise that fault electric arc produces, only have in the time that three kinds of sensors all detect fault-signal, system just can be thought in circuit fault electric arc has occurred, and consider the breakdown maintenance in later stage, this device is also provided with PZM device at 4 diverse locations and locates the position that fault electric arc occurs.But owing to having adopted large quantity sensor; and for the accuracy that ensures to detect; these sensors have strict demand in position; this has just caused the volume of whole equipment excessive; weight increases; and cannot in longer circuit, use, many restrictions make such device cannot expire the requirement of fault arc protection device.
Summary of the invention
The purpose of this utility model is to overcome the deficiencies in the prior art, and a kind of novel fault arc detection device is provided, and can judge whether accurately that electric arc occurs, and makes more simplification of hardware circuit, modularization, integrated and reliability is high.
On frequency domain, when fault electric arc occurs, at 10kHz, in the frequency range of 100kHz, higher harmonic components contained in electric current can showed increased.Based on this phenomenon, the foundation that can identify using the variation of radio-frequency component content as fault electric arc, judges whether the generation of fault electric arc according to the high-frequency signal that some detected.
For achieving the above object, the technical solution adopted in the utility model is: a kind of novel fault arc detection device, mainly comprises 50kHz Butterworth high-pass filtering module, rectification module and single-chip microcomputer identification module.In the time having fault electric arc to produce, fault electric arc electric current is that after the butterworth high pass filter of described 50kHz, low frequency signal is all filtered out by a cutoff frequency, is now left the observation of high-frequency signal oscillograph and can finds the burst pulse that many positive-negative half-cycle all have.Because its amplitude is very little and single-chip microcomputer None-identified negative voltage, so need pulse signals to amplify and rectification.In described high-pass filtering link, high-frequency signal is amplified to the scope that single-chip microcomputer can be identified, be DC pulse signal through described rectification module by alternating-current pulse signal rectification, whether the external interrupt mouth that DC pulse signal is input to described single-chip microcomputer identification module by comparer, judge whether to produce fault electric arc by the generation of external interrupt.
Brief description of the drawings
Fig. 1 is the theory diagram of the present embodiment.
Fig. 2 is the hardware circuit diagram of Hi-pass filter and rectification circuit.
Fig. 3 is single-chip microcomputer identification module hardware circuit diagram.
Embodiment
Below in conjunction with embodiment and accompanying drawing thereof, the utility model is remake to description.
Referring to Fig. 1, the theory diagram of the present embodiment.Comprise 50kHz Butterworth high-pass filtering module, rectification module and single-chip microcomputer identification module.Fault electric arc electric current is after high-pass filtering circuit, obtain the high-frequency pulse signal that positive-negative half-cycle all has, described rectification module is DC pulse signal by pulse signal rectification, DC pulse signal is input to after described single-chip microcomputer identification module, and single-chip microcomputer just can detect whether produce fault electric arc.
Referring to Fig. 2, it is the hardware circuit diagram of Hi-pass filter and rectification circuit.IN end is primary fault flame current signal input part, after the second order butterworth high pass filter of resistance capacitance and operational amplifier composition, has just obtained interchange narrow pulse signal.Resistance R 1 and R2 can control the gain multiple of 50kHz Butterworth high-pass filtering module to signal, and the size of gain multiple is (1+R2/R1).Be the rectifier bridge being formed by four commutation diodes, exchange burst pulse and after rectifier bridge, just become the DC pulse that single-chip microcomputer can be identified thereafter.
Referring to Fig. 3, it is the hardware circuit diagram of single-chip microcomputer identification module.OUT1 end will be linked into the input end of comparer, and the output OUT2 of comparer is linked into the external interrupt pin of single-chip microcomputer again, burst pulse of every like this generation, and single-chip microcomputer will detect external interrupt one time, thereby has indirectly known whether that fault electric arc produces.
Claims (1)
1. a novel fault arc detection device, is characterized in that: mainly comprise 50kHz Butterworth high-pass filtering module, rectification module and single-chip microcomputer identification module; It is characterized in that: described 50kHz Butterworth high-pass filtering module is made up of resistance capacitance and operational amplifier, fault electric arc electric current filters out low-frequency component through described 50kHz Butterworth high-pass filtering module, obtain the high-frequency pulse signal that positive-negative half-cycle all has, described resistance R 1 and R2 can control the gain multiple of described 50kHz Butterworth high-pass filtering module to signal, and described operational amplifier amplifies signal; Rectification module is mainly made up of four commutation diodes, and described rectification module is DC pulse signal by alternating-current pulse signal rectification; Described single-chip microcomputer identification module is made up of comparer and single-chip microcomputer, OUT1 end is received the input end of comparer, the output OUT2 of comparer is linked into the external interrupt pin of single-chip microcomputer again, burst pulse of every generation, single-chip microcomputer will detect external interrupt one time, thereby has judged whether that fault electric arc produces.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420289385.3U CN204028283U (en) | 2014-05-31 | 2014-05-31 | A kind of novel fault arc detection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420289385.3U CN204028283U (en) | 2014-05-31 | 2014-05-31 | A kind of novel fault arc detection device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204028283U true CN204028283U (en) | 2014-12-17 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420289385.3U Expired - Fee Related CN204028283U (en) | 2014-05-31 | 2014-05-31 | A kind of novel fault arc detection device |
Country Status (1)
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| CN (1) | CN204028283U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105067945A (en) * | 2015-09-07 | 2015-11-18 | 苏州长风自动化科技有限公司 | Intelligent detection unit with direct-current arcing detection function and junction box |
| CN105067931A (en) * | 2015-08-19 | 2015-11-18 | 珠海格力电器股份有限公司 | Series fault arc detection circuit |
| CN105445587A (en) * | 2015-12-07 | 2016-03-30 | 珠海格力电器股份有限公司 | Serial connection fault arc detection circuit |
| CN112505512A (en) * | 2020-01-02 | 2021-03-16 | 青岛鼎信通讯股份有限公司 | Fault arc identification method, device, equipment and medium |
-
2014
- 2014-05-31 CN CN201420289385.3U patent/CN204028283U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105067931A (en) * | 2015-08-19 | 2015-11-18 | 珠海格力电器股份有限公司 | Series fault arc detection circuit |
| CN105067945A (en) * | 2015-09-07 | 2015-11-18 | 苏州长风自动化科技有限公司 | Intelligent detection unit with direct-current arcing detection function and junction box |
| CN105445587A (en) * | 2015-12-07 | 2016-03-30 | 珠海格力电器股份有限公司 | Serial connection fault arc detection circuit |
| CN112505512A (en) * | 2020-01-02 | 2021-03-16 | 青岛鼎信通讯股份有限公司 | Fault arc identification method, device, equipment and medium |
| US11831138B2 (en) | 2020-01-02 | 2023-11-28 | Qingdao Topscomm Communication Co., Ltd | Fault-arc identification method, device and apparatus, and storage medium |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20180511 Address after: 300171 six Hewei Road, Hedong District, Tianjin, and Wan Hai building, 2511, Dazhi Gu eight road. Patentee after: Tianjin he pole electrical technology Co.,Ltd. Address before: 325600 Yueqing City Economic Development Zone, Zhejiang, Wenzhou, Zhejiang, No. 159, No. 6 road, Yueqing Patentee before: ZHEJIANG HEJI ELECTRIC TECHNOLOGY CO.,LTD. |
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| TR01 | Transfer of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20141217 |
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| CF01 | Termination of patent right due to non-payment of annual fee |