CN205507012U - Detection apparatus for low -loss long distance transmission partial discharge supersound signal - Google Patents
Detection apparatus for low -loss long distance transmission partial discharge supersound signal Download PDFInfo
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- CN205507012U CN205507012U CN201620286190.2U CN201620286190U CN205507012U CN 205507012 U CN205507012 U CN 205507012U CN 201620286190 U CN201620286190 U CN 201620286190U CN 205507012 U CN205507012 U CN 205507012U
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Abstract
The utility model provides a detection apparatus for low -loss long distance transmission partial discharge supersound signal, belongs to the high -Voltage insulation research field. The utility model discloses a piezoceramic transducer, preamplifier, video optical transmitter, optic fibre, coaxial cable, filter circuit, level lifting circuit, the next machine of DSP, host computer, USB data line. The utility model provides a regard as photoelectric conversion unit to carry out the long distance transmission of partial discharge supersound signal with video optical transmitter, its advantage lies in that (1) has reduced whole transmission system's loss, not only can reliablely and stablely convert partial discharge supersound signal into light signal and realize long distance transmission, has reduced electromagnetic interference and signal attenuation that partial discharge supersound signal probably received in the transmission course moreover, (2 )Promoted data transmission bauds with the next machine design of DSP for USB transmission interface, guaranteed the partial discharge supersound signal high speed of gathering and reliably uploaded.
Description
Technical field
The detection device of a kind of low-loss long-distance transmissions shelf depreciation ultrasonic signal that this utility model relates to, belongs to High-Voltage Insulation research field.
Background technology
Along with China's economic development, the requirement to power supply reliability is more and more higher, particularly significant with regard to show to the state-detection of electrical equipment.The local of the electrical equipment electric discharge phenomena that entirety still keeps insulating properties owing to insulation degradation occurs to discharge are referred to as shelf depreciation.As time goes on electrical equipment can be made progressively to lose insulating properties after occurring due to shelf depreciation, therefore shelf depreciation be detected particularly important with regard to show.Ultrasonic Partial Discharge Detection becomes one important method of on-line monitoring because of its good interference free performance, current most of on-line monitoring systems use coaxial cable to transmit the shelf depreciation ultrasonic signal collected, but during long-distance transmissions, the decay of shelf depreciation ultrasonic signal is bigger.If the electrical/optical dress die change block using specialty carries out signal conversion with optical electrical modular converter, then uses data collecting card to carry out uploading of signal, though transmission attenuation can be reduced, but the motility of its relatively costly and on-the-spot application is poor.
Summary of the invention
The purpose of this utility model is the deficiency overcoming existing shelf depreciation ultrasonic signal transmission acquisition system, the detection device of a kind of novel low-loss long-distance transmissions shelf depreciation ultrasonic signal is provided, purpose is to realize the long-distance transmissions of shelf depreciation ultrasonic signal, reduce signal decay in transmitting procedure and the electromagnetic interference being subject to, realize the preliminary treatment of signal, reduce system cost, make acquisition strategies more flexible.
As follows for realizing above-mentioned technical purpose the technical solution adopted in the utility model:
A kind of detection device of low-loss long-distance transmissions shelf depreciation ultrasonic signal, it is connected with preamplifier by coaxial cable including the piezoceramic transducer that shelf depreciation ultrasonic signal is converted to the signal of telecommunication, optical sender is connected subsequently by coaxial cable, optical fiber is used to connect optical sender and photoreceiver, by coaxial cable, photoreceiver is connected with filter circuit, subsequently by filter circuit and level lifting circuit connected in series, again level lifting circuit is connected with DSP slave computer, last DSP slave computer transmits a signal to host computer by USB data line and is further analyzed.
Use the utility model of technique scheme, the collection of ultrasonic local discharge signal and preliminary conversion is realized by piezoceramic transducer, the signal of telecommunication after conversion is amplified being easy to receipt of subsequent by preamplifier, the signal of telecommunication collected is converted to optical signal by fiber-optic transfer to photoreceiver by optical sender, optical signal is again converted to the signal of telecommunication by photoreceiver subsequently, the signal of telecommunication is filtered processing by filter circuit, transmit after voltage being raised by level lifting circuit subsequently and be changed into digital signal to DSP slave computer and carry out preliminary Digital Signal Processing, last digital signal carries out depth analysis process by USB data line transmission to host computer.
Further, described optical sender and photoreceiver are video optical multiplexer, and optical sender realizes analog/digital conversion function, and photoreceiver realizes D/A switch function.
Further, described filter circuit is bandwidth-limited circuit, with second-order low-pass filter circuit connected in series after using quadravalence high-pass filtering circuit to connect, it is achieved the bandwidth-limited circuit of 50kHz ~ 300kHz.
Further, described level lifting circuit by signal of telecommunication lifting 1.5V, makes input to the signal of telecommunication scope of DSP slave computer in 0 ~ 3V, it is ensured that the normal work of DSP slave computer.
Further, DSP slave computer uses when program writes and digital signal is first divided into 10 one group, takes out the maximum in every group, then is averaging processing by 10 maximums, carries out the Preliminary screening of digital signal and finds out eigenvalue and be transmitted；The hardware circuit design of DSP slave computer use USB2.0 transmit mouth, it is achieved the high-speed transfer of digital signal.
The beneficial effects of the utility model are:
1) the detection device of a kind of low-loss long-distance transmissions shelf depreciation ultrasonic signal that the utility model proposes, video optical multiplexer is used to realize the shelf depreciation ultrasonic signal that electrical/optical is changed with optical electrical and utilized optical fiber cable long-distance transmissions to gather, reduce the electromagnetic wave electromagnetic interference to signal in transmitting procedure, decrease the distortion of the shelf depreciation ultrasonic signal of collection, reduce the decay of shelf depreciation ultrasonic signal, improve the reliability of the ultrasonic signal collected；With traditional electrical/optical modular converter compared with the combination of optical electrical modular converter, the electrical/optical conversion using video optical multiplexer to realize signal is changed while ensureing conversion quality and efficiency with optical electrical, it is also possible to reduce detecting system cost；
2) filter circuit being previously mentioned in this utility model can realize being filtered the signal in shelf depreciation ultrasonic signal band limits (50kHz ~ 300kHz), reduces the noise gathering signal；Level lifting circuit ensure that collection signals security input DSP slave computer；The data using DSP slave computer to be shelf depreciation ultrasonic signal process and provide more motility scheme, and DSP slave computer uses USB to carry out data transmission ensure that collection signal is reliably uploaded at a high speed.
Accompanying drawing explanation
Fig. 1 is theory diagram of the present utility model.
Fig. 2 is bandwidth-limited circuit figure described in the utility model.
Fig. 3 is level lifting circuit diagram described in the utility model.
Detailed description of the invention
Below in conjunction with the accompanying drawings embodiment of the present utility model is elaborated:
Detailed description of the invention one: the piezoceramic transducer 1 that ultrasonic signal is converted to the signal of telecommunication is connected with preamplifier 2 by coaxial cable 9, optical sender 3 is connected subsequently by coaxial cable 9, optical fiber 10 is used to connect optical sender 3 and photoreceiver 4, by coaxial cable 9, photoreceiver 4 is connected with filter circuit 5, subsequently filter circuit 5 is connected with level lifting circuit 6, being connected with DSP slave computer 7 by level lifting circuit 6, last DSP slave computer 7 transmits a signal to host computer 8 by USB data line 11 and is further analyzed again.
Detailed description of the invention two: embodiment one is described further by present embodiment, in bandwidth-limited circuit described in Fig. 2, electric signal input end is 20, electrical signal is 30, it is achieved the signal filtering of 50kHz ~ 300kHz, and element design parameter the most specifically indicates.
Detailed description of the invention three: embodiment one is described further by present embodiment, the level lifting circuit electric signal input end described in Fig. 3 is 40, and electrical signal is 50, it is achieved incoming level lifting 1.5V, and element design parameter the most specifically indicates.
Detailed description of the invention four: embodiment two is described further by present embodiment with embodiment three, the parameter in Fig. 2 can realize the filtering of different bandwidth after calculating and changing；Parameter in Fig. 3 can be by magnitudes of voltage different for signal of telecommunication lifting after calculating and changing.
A kind of low-loss long-distance transmissions shelf depreciation ultrasonic signal detection device provided this utility model above is described in detail.On the premise of without departing from this utility model principle, it is also possible to be adjusted component parameters of the present utility model as required, these parameter adjustments also fall into this utility model scope of the claims.
Claims (4)
1. the detection device of a low-loss long-distance transmissions shelf depreciation ultrasonic signal, it is characterised in that: piezoceramic transducer (1), preamplifier (2), optical sender (3), photoreceiver (4), filter circuit (5), level lifting circuit (6), DSP slave computer (7), host computer (8), coaxial cable (9), optical fiber (10), USB data line (11)；Piezoceramic transducer (1) is connected with preamplifier (2) by coaxial cable (9), then preamplifier (2) is connected with optical sender (3) by coaxial cable (9), optical sender (3) is connected with the photoreceiver (4) receiving side by Transmission Fibers (10), then photoreceiver (4) is connected with filter circuit (5) by coaxial cable (9), filter circuit (5) is connected with level lifting circuit (6), level lifting circuit (6) is connected with DSP slave computer (7), last DSP slave computer (7) is connected with host computer (8) by USB data line (11).
The detection device of a kind of low-loss long-distance transmissions shelf depreciation ultrasonic signal the most according to claim 1, it is characterized in that: described optical sender (3) and photoreceiver (4) are video optical multiplexer, the signal of telecommunication of collection is converted to optical signal by optical sender (3), and photoreceiver (4) converts optical signals to the signal of telecommunication.
The detection device of a kind of low-loss long-distance transmissions shelf depreciation ultrasonic signal the most according to claim 1, it is characterized in that: described filter circuit (5) is the frequency range that bandwidth-limited circuit meets ultrasonic signal, the frequency filtering scope of bandwidth-limited circuit is 50 kHz ~ 300 kHz；Incoming level is raised 1.5V and is met the input voltage requirement of DSP slave computer (7) 0 ~ 3V by level lifting circuit (6).
The detection device of a kind of low-loss long-distance transmissions shelf depreciation ultrasonic signal the most according to claim 1, it is characterized in that: described DSP slave computer (7) is designed as USB communication interface, realize signal by USB data line (11) and transmit the most reliably to host computer (8).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620286190.2U CN205507012U (en) | 2016-04-08 | 2016-04-08 | Detection apparatus for low -loss long distance transmission partial discharge supersound signal |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620286190.2U CN205507012U (en) | 2016-04-08 | 2016-04-08 | Detection apparatus for low -loss long distance transmission partial discharge supersound signal |
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| CN205507012U true CN205507012U (en) | 2016-08-24 |
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| CN201620286190.2U Expired - Fee Related CN205507012U (en) | 2016-04-08 | 2016-04-08 | Detection apparatus for low -loss long distance transmission partial discharge supersound signal |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108572273A (en) * | 2017-03-10 | 2018-09-25 | 中芯国际集成电路制造(上海)有限公司 | Low current measuring circuit and its measurement method |
| CN109425809A (en) * | 2017-08-28 | 2019-03-05 | 株洲中车时代电气股份有限公司 | A kind of electric arc optical detection device and detection method |
| CN110674070A (en) * | 2019-09-29 | 2020-01-10 | 苏州浪潮智能科技有限公司 | Data optimization transmission method, data restoration method and related components |
| CN113947887A (en) * | 2021-10-15 | 2022-01-18 | 苏州纬讯光电科技有限公司 | Novel high-frequency signal transmission device based on photoelectric technology |
| CN114184900A (en) * | 2021-11-04 | 2022-03-15 | 中国工程物理研究院应用电子学研究所 | Strong electric field breakdown monitoring system for micro-area enclosed space |
-
2016
- 2016-04-08 CN CN201620286190.2U patent/CN205507012U/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108572273A (en) * | 2017-03-10 | 2018-09-25 | 中芯国际集成电路制造(上海)有限公司 | Low current measuring circuit and its measurement method |
| CN108572273B (en) * | 2017-03-10 | 2021-04-02 | 中芯国际集成电路制造(上海)有限公司 | Low current measuring circuit and measuring method thereof |
| CN109425809A (en) * | 2017-08-28 | 2019-03-05 | 株洲中车时代电气股份有限公司 | A kind of electric arc optical detection device and detection method |
| CN110674070A (en) * | 2019-09-29 | 2020-01-10 | 苏州浪潮智能科技有限公司 | Data optimization transmission method, data restoration method and related components |
| CN110674070B (en) * | 2019-09-29 | 2021-06-29 | 苏州浪潮智能科技有限公司 | Data optimization transmission method, data restoration method and related components |
| CN113947887A (en) * | 2021-10-15 | 2022-01-18 | 苏州纬讯光电科技有限公司 | Novel high-frequency signal transmission device based on photoelectric technology |
| CN114184900A (en) * | 2021-11-04 | 2022-03-15 | 中国工程物理研究院应用电子学研究所 | Strong electric field breakdown monitoring system for micro-area enclosed space |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| 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: 20160824 Termination date: 20170408 |