CN204731298U - Measure the electrooptical device of low voltage signal - Google Patents
Measure the electrooptical device of low voltage signal Download PDFInfo
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- CN204731298U CN204731298U CN201520341496.9U CN201520341496U CN204731298U CN 204731298 U CN204731298 U CN 204731298U CN 201520341496 U CN201520341496 U CN 201520341496U CN 204731298 U CN204731298 U CN 204731298U
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- laser aligner
- light
- low voltage
- voltage signal
- electrooptical device
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Abstract
The utility model belongs to technical field of electric power detection, provide a kind of electrooptical device measuring low voltage signal, comprise the laser aligner I set gradually along light path, the polarizer, quarter wave plate, bismuth-germanium-oxide crystal, analyzer and laser aligner II, the light input end of described laser aligner I is connected with the light output end of lasing light emitter by optical fiber, the light output end of described laser aligner II is connected with the light input end of photodetector by optical fiber, the upper surface of described bismuth-germanium-oxide crystal and lower surface are coated with the metal level as detecting electrode, can reach and increase crystals electric fields uniform degree, reduce the object of signal noise, device of the present utility model reduces the risk that long-time running has, and measurement result is accurate, facilitates the long range propagation of signal, has higher engineer applied and is worth.
Description
Technical field
The utility model belongs to technical field of electric power detection, is specifically related to a kind of measurement mechanism of low voltage signal.
Background technology
Current over-voltage measurement sensor is mainly divided into following a few class: for the traditional capacitance voltage divider of power distribution network grade, for bottom shielding of bushing voltage divider system and the circuit coupling capacitance formula non-contact voltage sensor of high pressure and supergrid.Traditional capacitive divider directly must be connected with electric system primary equipment, when electric pressure is lower, this voltage divider being parallel to primary equipment for a long time has the advantages such as measuring accuracy is high, transient response characteristic is good, but when electric pressure is higher, voltage divider adds additional primary equipment in system and drops into, and long-time running has larger risk.Bottom shielding of bushing voltage divider system method structure is simple, but also there is end shield ground wire broken string or sensor open circuit causes the potential dangers such as end shield electric discharge.
Utility model content
In view of this, the purpose of this utility model is to provide a kind of electrooptical device measuring low voltage signal, overcomes original potential safety hazard, has higher precision and frequency response speed.Crystal upper and lower surface Vacuum Deposition layer gold is compared and is clamped in crystal upper and lower surface with the thick copper sheet metal of 2mm and largely can increases and apply crystals electric fields uniform degree, reaches the object reducing signal noise.
For achieving the above object, the utility model provides following technical scheme:
Measure the electrooptical device of low voltage signal, comprise laser aligner I, the polarizer, quarter wave plate, bismuth-germanium-oxide crystal, analyzer and the laser aligner II set gradually along light path, the light input end of described laser aligner I is connected with the light output end of lasing light emitter by optical fiber, the light output end of described laser aligner II is connected with the light input end of photodetector by optical fiber, and the upper surface of described bismuth-germanium-oxide crystal and lower surface are coated with the metal level as detecting electrode.
Further, described metal level is Vacuum Deposition layer gold.
Further, vacuum metallizing layer thickness is 0.1mm
Further, described detecting electrode is from the contactless coupling plate dividing potential drop electrical network.
Further, the light input end of described laser aligner I is connected with the light output end of lasing light emitter by polarization maintaining optical fibre, and the light output end of described laser aligner II is connected with the light input end of photodetector by multimode optical fiber.
The utility model has the following advantages relative to prior art tool: reduce the risk that long-time running has.The end shield ground wire broken string or the sensor open circuit that reduce the existence of bottom shielding of bushing voltage divider system method cause the potential dangers such as end shield electric discharge; Measurement result is accurate, and frequency range can reach GHz in theory, facilitates the long range propagation of signal, has higher engineer applied and is worth; Response characteristic under thunder and lightning and operating impulse voltage has higher precision and frequency response speed, goes for the superpotential non-contact passive monitoring of each electric pressure.
Accompanying drawing explanation
Fig. 1 shows the structural representation of the electrooptical device measuring low voltage signal.
Embodiment
In order to make the purpose of this utility model, technical scheme and advantage clearly, will be described in further detail embodiment of the present utility model below.
See Fig. 1, the electrooptical device of the measurement low voltage signal of the present embodiment, comprises the steps:
Comprise the laser aligner I 1, the polarizer 2, quarter wave plate 3, bismuth-germanium-oxide crystal 4, analyzer 5 and the laser aligner II 6 that set gradually along light path, the light input end of described laser aligner I 1 is connected by the light output end of polarization maintaining optical fibre with lasing light emitter 7, the light output end of described laser aligner II 6 is connected by the light input end of multimode optical fiber with photodetector 8, the upper surface of described bismuth-germanium-oxide crystal 4 and lower surface are coated with the Vacuum Deposition layer gold as detecting electrode, and described vacuum metallizing layer thickness is 0.1mm; Described detecting electrode is from the contactless coupling plate dividing potential drop electrical network.
The electrooptical device of the measurement low voltage signal of the present embodiment is by the voltage obtained from noncontact coupling plate dividing potential drop, and voltage swing is within 50V.During measurement, the laser sent by lasing light emitter enters laser aligner by optical fiber, and the light after gathering by the polarizer, becomes polarized light again, through quarter wave plate, enters bismuth-germanium-oxide crystal after producing the phasic difference of a pi/2.Vacuum Deposition layer gold as detecting electrode respond to survey electric potential difference.This electric potential difference is capacitance partial pressure gained electric potential difference.From the electrooptical effect of crystal, refractive index, the light intensity of crystal can change because of extra electric field.Enter analyzer by crystal light out, then enter optical fiber by laser aligner, light signal is converted to the electric signal needed for us by photodetector.Surveyed voltage can be released by the data of gained electric signal are counter, and then obtain circuit high voltage.
What finally illustrate is, above embodiment is only in order to illustrate the technical solution of the utility model and unrestricted, although be described in detail the utility model with reference to preferred embodiment, those of ordinary skill in the art is to be understood that, can modify to the technical solution of the utility model or equivalent replacement, and not departing from aim and the scope of technical solutions of the utility model, it all should be encompassed in the middle of right of the present utility model.
Claims (5)
1. measure the electrooptical device of low voltage signal, it is characterized in that: comprise laser aligner I, the polarizer, quarter wave plate, bismuth-germanium-oxide crystal, analyzer and the laser aligner II set gradually along light path, the light input end of described laser aligner I is connected with the light output end of lasing light emitter by optical fiber, the light output end of described laser aligner II is connected with the light input end of photodetector by optical fiber, and the upper surface of described bismuth-germanium-oxide crystal and lower surface are coated with the metal level as detecting electrode.
2. the electrooptical device measuring low voltage signal as claimed in claim 1, is characterized in that: described metal level is Vacuum Deposition layer gold.
3. the electrooptical device measuring low voltage signal as claimed in claim 2, is characterized in that: vacuum metallizing layer thickness is 0.1mm.
4. the electrooptical device measuring low voltage signal as claimed in claim 3, is characterized in that: described detecting electrode is from the contactless coupling plate dividing potential drop electrical network.
5. the electrooptical device of the measurement low voltage signal according to any one of claim 1-4, it is characterized in that: the light input end of described laser aligner I is connected with the light output end of lasing light emitter by polarization maintaining optical fibre, the light output end of described laser aligner II is connected with the light input end of photodetector by multimode optical fiber.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520341496.9U CN204731298U (en) | 2015-05-25 | 2015-05-25 | Measure the electrooptical device of low voltage signal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520341496.9U CN204731298U (en) | 2015-05-25 | 2015-05-25 | Measure the electrooptical device of low voltage signal |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204731298U true CN204731298U (en) | 2015-10-28 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520341496.9U Expired - Fee Related CN204731298U (en) | 2015-05-25 | 2015-05-25 | Measure the electrooptical device of low voltage signal |
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| CN (1) | CN204731298U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113533826A (en) * | 2021-07-15 | 2021-10-22 | 深圳普泰电气有限公司 | High-precision current monitoring and processing system |
-
2015
- 2015-05-25 CN CN201520341496.9U patent/CN204731298U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113533826A (en) * | 2021-07-15 | 2021-10-22 | 深圳普泰电气有限公司 | High-precision current monitoring and processing system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| 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: 20151028 Termination date: 20160525 |