CN203191111U - Temperature measurement device based on optical fibre sensing technology for electric contact - Google Patents
Temperature measurement device based on optical fibre sensing technology for electric contact Download PDFInfo
- Publication number
- CN203191111U CN203191111U CN201320181187.0U CN201320181187U CN203191111U CN 203191111 U CN203191111 U CN 203191111U CN 201320181187 U CN201320181187 U CN 201320181187U CN 203191111 U CN203191111 U CN 203191111U
- Authority
- CN
- China
- Prior art keywords
- converter
- optical fibre
- signal output
- signal
- electric contact
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Images
Landscapes
- Measuring Temperature Or Quantity Of Heat (AREA)
Abstract
The utility model discloses a temperature measurement device based on an optical fibre sensing technology for an electric contact. The temperature measurement device comprises an optical fibre coupler, a PCF (photonic crystal fibre) liquid-crystal temperature sensor, an optical fibre F-P (Fabry-Perot) filter, a photoelectric converter, an amplification circuit, a first A/D (analogue/digital) converter, a second A/D converter, a single chip, and a display module, wherein the signal port of the PCF liquid-crystal temperature sensor is connected with the signal port of the optical fibre coupler; and the signal input end of the optical fibre F-P filter is connected with the signal output end of the optical fibre coupler and the signal output end of the second A/D converter respectively. The temperature measurement device based on the optical fibre sensing technology for the electric contact disclosed by the utility model has the advantages of high electric insulation, electromagnetic interference resistance, high temperature measurement accuracy, low cost and the like, as well as is suitable for online temperature detection on the electric contact in an electric power system, and worth popularization and use.
Description
Technical field
The utility model relates to a kind of electric contact temp measuring system, relates in particular to a kind of electric contact temp measurement mechanism based on optical fiber sensing technology.
Background technology
Equipment such as the power cable in the electric system, high-tension switch cabinet, generator, high-power high voltage motor; its operation exception or break down all can cause equipment key position temperature to raise usually; so, can obtain the operation conditions of power equipment by monitoring power equipment temperature information.High voltage electric equipment in the electric system generally all is in the environment of high voltage, big electric current and high-intensity magnetic field, because forceful electric power magnetic noise and High-Voltage Insulation problem, conventional temp measuring method is not suitable for the measurement of power system device temperature.The monitoring of temperature in the past mainly adopts thermopair, thermal resistance and semiconductor temperature sensor equitemperature sensing element to realize, and these temperature-sensing elements all need plain conductor transmission signal, owing to can't guarantee that transfer wire has reliable and stable insulating property in metal enclosed switchgear, adopt above temperature-sensing element can't realize the running temperature of on-line measurement sealing contact point.Though optical fiber, optical fiber grating temperature-measuring can be used to the electric contact temp of electric system is carried out on-line monitoring, but optical fiber temperature-measurement to light source, transmit and receive the stability requirement height of circuit, have shortcomings such as temperature measurement accuracy is low, spatial resolution is low: optical fiber grating temperature-measuring requires high to demodulating system, the system cost height.
The utility model content
The purpose of this utility model just is to provide in order to address the above problem a kind of simple in structure, temperature measurement accuracy is high and cost is low electric contact temp measurement mechanism based on optical fiber sensing technology.
In order to achieve the above object, the utility model has adopted following technical scheme:
Electric contact temp measurement mechanism based on optical fiber sensing technology, comprise fiber coupler, PCF liquid crystal temperature sensor, the fiber F-P wave filter, photoelectric commutator, amplifying circuit, first A/D converter, second A/D converter, single-chip microcomputer and display module, the signal port of described PCF liquid crystal temperature sensor is connected with the signal port of described fiber coupler, the signal input part of described fiber F-P wave filter is connected with the signal output part of described photoelectrical coupler and the signal output part of described second A/D converter respectively, the signal output part of described fiber F-P wave filter is connected with the signal input part of described photoelectric commutator, the signal output part of described photoelectric commutator is connected with the signal input part of described amplifying circuit, the signal output part of described amplifying circuit is connected with the signal input part of described first A/D converter, the signal output part of described first A/D converter is connected with the signal input part of described single-chip microcomputer, and the signal output part of described single-chip microcomputer is connected with the signal input part of described second A/D converter and the signal input part of described display module respectively.
The beneficial effects of the utility model are:
A kind of electric contact temp measurement mechanism based on optical fiber sensing technology of the utility model has high electric insulation and anti-electromagnetic interference (EMI), temperature measurement accuracy height, low cost and other advantages, and the temperature online that is suitable for electric contact in the electric system detects.
Description of drawings
Fig. 1 is structured flowchart of the present utility model.
Embodiment
The utility model is described in further detail below in conjunction with accompanying drawing:
As shown in Figure 1, the utility model is based on the electric contact temp measurement mechanism of optical fiber sensing technology, it is characterized in that: comprise fiber coupler, PCF liquid crystal temperature sensor, the fiber F-P wave filter, photoelectric commutator, amplifying circuit, first A/D converter, second A/D converter, single-chip microcomputer and display module, the signal port of described PCF liquid crystal temperature sensor is connected with the signal port of described fiber coupler, the signal input part of described fiber F-P wave filter is connected with the signal output part of described photoelectrical coupler and the signal output part of described second A/D converter respectively, the signal output part of described fiber F-P wave filter is connected with the signal input part of described photoelectric commutator, the signal output part of described photoelectric commutator is connected with the signal input part of described amplifying circuit, the signal output part of described amplifying circuit is connected with the signal input part of described first A/D converter, the signal output part of described first A/D converter is connected with the signal input part of described single-chip microcomputer, and the signal output part of described single-chip microcomputer is connected with the signal input part of described second A/D converter and the signal input part of described display module respectively.
Use the utility model as follows based on the principle of work of the electric contact temp measuring system of optical fiber sensing technology:
Core of the present utility model is PCF liquid crystal temperature sensor, fiber F-P wave filter and signal processing circuit.Utilize the screw type liquid crystal to select the reflected light wavelength to the highstrung characteristic of temperature variation, the PCF temperature sensor is converted to variation of temperature the variation of reflected light wavelength, the fiber F-P wave filter adds the conversion that turntable driving voltage demodulates this optical wavelength by change, and the recycling liquid crystal selects the relation of reflected light wavelength and temperature to obtain temperature information.Temperature-measurement principle is that the light that wideband light source sends enters Transmission Fibers through the optical fiber coupling apparatus, connect by ring flange again and enter PCF temperature sensor and fiber F-P wave filter, different temperatures is selected the light of reflection different wave length, utilize photoelectric commutator to produce corresponding photocurrent, pass through amplifying circuit (comprising I-V conversion, voltage amplification and filtering circuit) again, obtain the output voltage of different temperatures correspondence, carry out data processing and system's control through A/D conversion and single-chip microcomputer, temperature is shown.
The selection reflected light wavelength of screw type liquid crystal is very responsive to temperature variation. and hollow-core photonic crystal fiber is all insensitive to bending, temperature.The screw type liquid crystal is filled in the fibre core airport of hollow-core photonic crystal fiber, constitutes the temperature sensor that the reflection wavelength position changes with temperature.This sensor has advantages such as intrinsic safety, high electric insulation and anti-electromagnetic interference (EMI), with normal transmission optical fiber also can fine compatibility; The variation of environmental pressure can reduce by the airport of photonic crystal fiber covering the influence of this temperature sensor, thereby has overcome the cross sensitivity characteristic of conventional optical fibers and optical fiber grating temperature and pressure; Adopt near-infrared light source, overcome the influence of surround lighting, thereby made the measuring accuracy of this sensor higher, can obtain different temperature measurement range by selecting different screw type liquid crystal compounds for use, to realize the online detection of multiple spot different temperatures.
Claims (1)
1. electric contact temp measurement mechanism based on optical fiber sensing technology, it is characterized in that: comprise fiber coupler, PCF liquid crystal temperature sensor, the fiber F-P wave filter, photoelectric commutator, amplifying circuit, first A/D converter, second A/D converter, single-chip microcomputer and display module, the signal port of described PCF liquid crystal temperature sensor is connected with the signal port of described fiber coupler, the signal input part of described fiber F-P wave filter is connected with the signal output part of described photoelectrical coupler and the signal output part of described second A/D converter respectively, the signal output part of described fiber F-P wave filter is connected with the signal input part of described photoelectric commutator, the signal output part of described photoelectric commutator is connected with the signal input part of described amplifying circuit, the signal output part of described amplifying circuit is connected with the signal input part of described first A/D converter, the signal output part of described first A/D converter is connected with the signal input part of described single-chip microcomputer, and the signal output part of described single-chip microcomputer is connected with the signal input part of described second A/D converter and the signal input part of described display module respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320181187.0U CN203191111U (en) | 2013-04-11 | 2013-04-11 | Temperature measurement device based on optical fibre sensing technology for electric contact |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320181187.0U CN203191111U (en) | 2013-04-11 | 2013-04-11 | Temperature measurement device based on optical fibre sensing technology for electric contact |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203191111U true CN203191111U (en) | 2013-09-11 |
Family
ID=49107964
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320181187.0U Expired - Fee Related CN203191111U (en) | 2013-04-11 | 2013-04-11 | Temperature measurement device based on optical fibre sensing technology for electric contact |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203191111U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106482862A (en) * | 2016-09-29 | 2017-03-08 | 西安交通大学 | A kind of demodulation method of optical fiber F P temperature sensor and system |
| CN112665754A (en) * | 2021-02-04 | 2021-04-16 | 国网河南省电力公司检修公司 | Novel optical fiber temperature measurement system of high-voltage switch cabinet of transformer substation |
-
2013
- 2013-04-11 CN CN201320181187.0U patent/CN203191111U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106482862A (en) * | 2016-09-29 | 2017-03-08 | 西安交通大学 | A kind of demodulation method of optical fiber F P temperature sensor and system |
| CN112665754A (en) * | 2021-02-04 | 2021-04-16 | 国网河南省电力公司检修公司 | Novel optical fiber temperature measurement system of high-voltage switch cabinet of transformer substation |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN201331390Y (en) | Wireless temperature monitoring system device for buses in high and low voltage distribution cabinet | |
| CN204043818U (en) | Distributed optical fiber temperature sensor | |
| CN104101447A (en) | Distributed optical fiber temperature sensor and method for removing nonlinear error of same | |
| CN103398740A (en) | Real-time on-line monitoring device for monitoring abnormal operation of switch cabinet | |
| CN202651537U (en) | Cable plug with temperature detection | |
| CN203191111U (en) | Temperature measurement device based on optical fibre sensing technology for electric contact | |
| CN106840224B (en) | Fiber Bragg grating demodulation system based on electro-absorption modulator and peak searching method | |
| CN206056817U (en) | A kind of connect-disconnect plug with temperature-monitoring function | |
| CN103115690A (en) | Method of online monitoring for high-voltage switch contact temperature rise | |
| CN103630266A (en) | Optical fiber temperature measurement host, optical fiber temperature measurement system and optical fiber temperature measurement method | |
| CN204027731U (en) | A kind of temperature rise on-Line Monitor Device for ring main unit inner cable joint | |
| CN201000371Y (en) | Portable electric equipment temperature detecting system with optical fiber grating sensor and sensor thereof | |
| CN201673587U (en) | Operating temperature monitor for high-voltage equipment | |
| CN2852081Y (en) | Online infrared temperature measurer for high voltage switch cabinet | |
| CN211904456U (en) | GIS internal joint temperature on-line monitoring device | |
| CN205940804U (en) | High tension cable silicon rubber terminal with temperature measurement function | |
| CN202189111U (en) | Wireless temperature measurement system of high voltage switch contacts | |
| CN203191085U (en) | High voltage equipment temperature monitoring system used for electric power inspection | |
| CN103776563A (en) | Fiber point-mode temperature measuring system with wireless networking function | |
| CN208013477U (en) | A kind of distributed optical fiber temperature measurement early warning tubular bus and monitoring system | |
| CN203259266U (en) | Smart power grid plastic optical fiber temperature sensing system | |
| CN204007932U (en) | A kind of temperature of transformer winding device | |
| CN207036296U (en) | A kind of optical cable temperature measurement early warning system based on DTS | |
| CN202836823U (en) | On-line security integrated monitoring and early warning system for power cable tunnel | |
| CN203705082U (en) | Fiber temperature measurement host and system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130911 Termination date: 20140411 |