CN203132737U - Novel power cable conductor temperature measuring sensor based on FBG (fiber Bragg grating) - Google Patents
Novel power cable conductor temperature measuring sensor based on FBG (fiber Bragg grating) Download PDFInfo
- Publication number
- CN203132737U CN203132737U CN201220629456.0U CN201220629456U CN203132737U CN 203132737 U CN203132737 U CN 203132737U CN 201220629456 U CN201220629456 U CN 201220629456U CN 203132737 U CN203132737 U CN 203132737U
- Authority
- CN
- China
- Prior art keywords
- fbg
- bragg grating
- cable conductor
- fiber bragg
- temperature
- 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
Abstract
The utility model relates to a novel power cable conductor temperature measuring sensor based on FBG (fiber Bragg grating). The novel power cable conductor temperature measuring sensor is composed of an optical fiber Bragg grating, a ceramic base body, a stainless steel pipe probe and an FC-type interface tail fiber, and is characterized in that the optical fiber Bragg grating is pre-stretched and cured, is packaged with high-temperature resisting glue and then is fixed in a groove of the ceramic base body; after being packaged, the ceramic base body containing the optical fiber Bragg grating is fixed in the front end of the stainless steel pipe probe by using heat-conducting glue; and the tail end of the stainless steel pipe probe is connected with the FC-type interface tail fiber together. The novel power cable conductor temperature measuring sensor based on the FBG has the advantages that since optical fibers are adopted in the temperature measurement and transmission, the novel power cable conductor temperature measuring sensor has strong anti-electromagnetic interference capability, the temperature sensor and a transmission and measurement module are not interfered by electric signals, and the measurement module will not be damaged due to impact generated by cable faults; since ceramic package is adopted, the thermal reaction time is short; and multiple probes can be arranged in the same detection loop, so that rapid accurate measurement of temperature of multiple target can be realized.
Description
Technical field
The utility model relates to a kind of novel electric power temperature measurement of cable conductor sensor based on FBG, belongs to the power cable conductor temperature field of measuring technique.
Background technology
1 cable conductor temperature is a key parameter of cable, must measure in real time conductor temperature when test or operation.Adopt T type thermopair and traditional temperature measurement module to carry out conductor temperature in the past and measure, the shortcoming of this mode is: there be potential difference (PD) in cable between each thermopair puncturing moment on the same cable, causes the temperature collect module that is attached thereto to damage.
Therefore, improve traditional conductor thermometric mode, adopt novel reliable temperature survey mode, significant.The novel temperature measurement mode is tackled temperature collect module and is taked necessary safeguard measure, and the assurance module can not damaged because of cable breakdown.
The utility model is sought the conventional temperature sensor of solving over and the easy problem of damaging in enormous quantities of temperature measurement module.This novel temperature sensor and temp measuring system, requirement can be realized that temperature is accurate, measure in real time, and in the time of guaranteeing that cable breaks down again, sensor and temperature measurement module can not be damaged.
2 power cable conductor temperature measuring system present situations
Existing power cable temperature measuring system is distinguished from principle of work, mainly contains electric signal sensor and optical signal sensor two big classes.Electric signal sensor comprises traditional thermopair and thermal resistance sensor and special types such as semiconductor transducer; And optical signal sensor mainly contains based on the back to the temperature-measuring system of distributed fibers of Raman scattering principle with based on two types of the temp measuring systems of fiber grating principle.The principle of work of electric signal sensor is to utilize conventional temperature sensing device that temperature data is converted to electric signal to carry out thermometric.Mainly be when passing through in optical fiber according to incident light based on the back to the principle of work of the temperature-measuring system of distributed fibers of Raman scattering, owing to the different light scattered power differences at this place that cause of the residing temperature of optical fiber body, and then influence the scattered intensity that the light emission end receives and change, thereby calculate the temperature value at this place.Because the velocity of propagation of light in optical fiber is certain, therefore receive that according to transmitting terminal the sequencing of scattered light and the time interval just can calculate optical fiber body Temperature Distribution along the line.
From the angle of using, the all temps sensing technology has his own strong points, for example traditional electric signal sensor has temperature measurement accuracy height, swift characteristics, but there are shortcomings such as wiring is complicated, fragile, the system maintenance work amount is big in electric signal sensor, and electric signal sensor does not possess self-checking function, needs frequent verification; And adopt the back of optical signal sensor can cable Temperature Distribution along the line to be measured to the Raman scattering technology, has certain advantage aspect the long-distance cable on-line temperature monitoring, but it is high especially to the requirement of light source, and the photoelectric monitor equipment manufacturing cost rises significantly along with the increase of cable distance; Adopt the thermometry of fiber grating principle that following characteristics are arranged: optical fiber is adopted in temperature survey and transmission, anti-electromagnetic interference capability is strong, temperature sensor, transmission and measurement module are not disturbed by electric signal, can not cause measurement module to damage because of the impact that cable fault produces.Use the function class of the fiber-optical grating temperature sensor that the quasi-molecule technology makes at the optical fiber body to be similar to the electric signal temperature sensor of point-like, adopt stainless steel casing or ceramic package, the thermal response time is short, in same detection loop, can arrange a plurality of probes, thereby realize the measurement quick and precisely to a plurality of target temperatures.
In view of this, the utility model provides a kind of novel electric power temperature measurement of cable conductor sensor based on FBG, to satisfy the commercial Application needs.
Summary of the invention
The purpose of this utility model provides a kind of novel electric power temperature measurement of cable conductor sensor based on FBG, quick, accurately measurement to small space inner cable conductor temperature can be realized, the measurement module damage can be do not caused because of the impact that cable fault produces simultaneously.
The technical solution of the utility model is: a kind of novel electric power temperature measurement of cable conductor sensor based on FBG, it is made up of Fiber Bragg Grating FBG, ceramic matrix, stainless-steel tube probe, FC type optical interface tail optical fiber, it is characterized in that: after Fiber Bragg Grating FBG process prestretched and solidifying, be fixed in the groove of ceramic matrix with the high-temperature plastic encapsulation, the ceramic matrix that will comprise Fiber Bragg Grating FBG after encapsulation is finished is fixed on stainless-steel tube probe front end inside with heat-conducting glue, and stainless-steel tube probe tail end and FC type optical interface tail optical fiber link together.The technique effect that brings thus is: adopt drawing Fiber Bragg Grating FBG to replace traditional T type thermopair as temperature-sensing element, have following characteristics: drawing Fiber Bragg Grating FBG has better linearity degree and higher sensitivity, the sensor anti-electromagnetic interference capability is strong, transmission and measurement module are not disturbed by electric signal, can not cause measurement module to damage because of the impact that cable fault produces.
Aforesaid novel electric power temperature measurement of cable conductor sensor based on FBG, it is characterized in that: being shaped as of described ceramic matrix is cylindrical, and diameter 2.5mm adopts the high temperature encapsulation technology that Fiber Bragg Grating FBG is encapsulated in the groove of ceramic matrix.
Aforesaid novel electric power temperature measurement of cable conductor sensor based on FBG is characterized in that: external diameter 3.5mm, internal diameter 3mm, the length 10cm of stainless-steel tube probe.
Aforesaid novel electric power temperature measurement of cable conductor sensor based on FBG, it is characterized in that: the length of FC type optical interface is 5cm.
The beneficial effects of the utility model are: the utility model adopts drawing fiber Bragg grating sensor to replace traditional T type thermopair as temperature sensor, have following characteristics: drawing Fiber Bragg Grating FBG has the better linearity degree, its heat sensitivity is 3.5 times of bare optical fibers and bare optical gratings, when keeping good linearity, its temperature measurement accuracy improves greatly.The sensor anti-electromagnetic interference capability is strong, and transmission and measurement module are not disturbed by electric signal, can not cause measurement module to damage because of the impact that cable fault produces.
Advantage of the present utility model is temperature survey and transmission employing optical fiber, and anti-electromagnetic interference capability is strong, and temperature sensor, transmission and measurement module are not disturbed by electric signal, can not cause measurement module to damage because of the impact that cable fault produces.Use the function class of the fiber-optical grating temperature sensor that the quasi-molecule technology makes at the optical fiber body to be similar to the electric signal temperature sensor of point-like, adopt ceramic package, the thermal response time is short, in same detection loop, can arrange a plurality of probes, thereby realize the measurement quick and precisely to a plurality of target temperatures.
Description of drawings
Fig. 1 is the structural drawing of the novel electric power temperature measurement of cable conductor sensor based on FBG of the present utility model.
Fig. 2 is the packaging technology figure of the novel electric power temperature measurement of cable conductor sensor based on FBG of the present utility model.
Embodiment
In order to understand the present invention better, further illustrate content of the present invention below in conjunction with embodiment, but content of the present invention not only is confined to the following examples.Those skilled in the art can make various changes or modifications the present invention, and these equivalent form of values are equally within the listed claims limited range of the application.
Symbol description in the accompanying drawing: 1, Fiber Bragg Grating FBG, 2, ceramic matrix, 3, stainless-steel tube probe, 4, FC type optical interface tail optical fiber.
As shown in Figure 1, a kind of novel electric power temperature measurement of cable conductor sensor based on FBG of the present utility model, it is made up of Fiber Bragg Grating FBG 1, ceramic matrix 2, stainless-steel tube probe 3, FC type optical interface tail optical fiber 4.After Fiber Bragg Grating FBG 1 process prestretched and solidifying, be fixed in the groove of ceramic matrix 2 with the high-temperature plastic encapsulation, the ceramic matrix 2 usefulness heat-conducting glues that encapsulation will comprise Fiber Bragg Grating FBG after finishing are fixed on the stainless-steel tube 3 front end inside of popping one's head in, and stainless-steel tube probe tail end and FC type optical interface tail optical fiber 4 link together.
The major function of Fiber Bragg Grating FBG 1 is to realize the light signal sensing of tested cable conductor temperature, and by optical fiber output signal is passed to measuring equipment.
The major function of ceramic matrix 2 is by the pre-loose length of regulating fiber grating so that it just begins the method that is tightened up to the temperature that needs measurement, makes sensor under the high temperature of needs very high sensitivity can be arranged.
The major function of stainless-steel tube probe 3 is when minimizing the distribution of the tested construction of cable of change and thermal field, and the cable conductor temperature is accurately measured.
The major function of FC type optical interface tail optical fiber 4 be optical signal transmission that bragg grating is measured to measuring equipment, thereby calculate the temperature value at this place.
Above-mentioned ceramic matrix 2 be shaped as column type, external diameter is 2.5mm.Adopt encapsulation technology Fiber Bragg Grating FBG 1 to be packaged in the groove of ceramic matrix 2, and the packaged ceramic matrix that comprises bragg grating 12 is fixed on stainless-steel tube 3 inside of popping one's head in, external diameter 3.5mm, internal diameter 3mm, the length 10cm of stainless-steel tube probe 3 with heat-conducting glue.Stainless-steel tube probe tail end and FC type optical interface tail optical fiber 4 link together, and the length of FC type optical interface is 5cm.
In concrete implementation step of the present utility model, should at first carry out the encapsulation of sensor and make.The temperature sensor that the utility model adopts adopts Bragg grating as sensing material, and makes (referring to Fig. 2) according to following manner:
1. ceramic matrix bottom is fixed on the metal tray with double faced adhesive tape, small copper ring is put in as shown in Figure 2 position.Being shaped as of ceramic matrix is cylindrical, diameter 2.5mm.
2. fiber grating is put into the ceramic matrix groove, is made the grating grid region be in matrix inner room position intermediate, and determine the bending radius of grating with small copper ring, with water-color paintbrush at ceramic matrix inner room and mistress junction mark.
3. outwards peel off 2 ~ 3 millimeters coat with the fiber stripping pincers from mark, and with dipping in the dustless cotton wiped clean of getting alcohol.
4. modulate a spot of AB glue, dip in toothpick and get AB glue, put in the inner room of matrix and mistress's junction, ceramic matrix inner room and mistress's shutoff are opened, operation 353ND solation is gone into the matrix inner room after preventing, also optical fiber is fixed on the ceramic matrix, as shown in Figure 2 simultaneously.
5. wait for 5 minutes, treat the AB adhesive curing.
6. will remove 353ND glue+silica flour on the fiber optic point of coat, about 3 millimeters of some glue length makes naked fibre be encased by glue.
7. fiber reel is put into metal dish, puts into 100 ℃ high temperature baking box, solidifies 15 minutes.
8. after the encapsulation of sensor finishes, with heat-conducting glue packaged Fiber Bragg Grating FBG is fixed on stainless-steel tube probe front end inside, external diameter 3.5mm, internal diameter 3mm, the length 10cm of stainless-steel tube probe.
At last, the stainless-steel tube probe is linked together with FC type optical interface tail optical fiber, finish the making of sensor.The length of FC type optical interface is 5cm.
The content that is not described in detail in this instructions belongs to this area professional and technical personnel's known prior art.
Claims (4)
1. novel electric power temperature measurement of cable conductor sensor based on FBG, it is made up of Fiber Bragg Grating FBG, ceramic matrix, stainless-steel tube probe, FC type optical interface tail optical fiber, it is characterized in that: after Fiber Bragg Grating FBG process prestretched and solidifying, be fixed in the groove of ceramic matrix with the high-temperature plastic encapsulation, the ceramic matrix that will comprise Fiber Bragg Grating FBG after encapsulation is finished is fixed on stainless-steel tube probe front end inside with heat-conducting glue, and stainless-steel tube probe tail end and FC type optical interface tail optical fiber link together.
2. the novel electric power temperature measurement of cable conductor sensor based on FBG according to claim 1, it is characterized in that: being shaped as of described ceramic matrix is cylindrical, diameter 2.5mm adopts the high temperature encapsulation technology that Fiber Bragg Grating FBG is encapsulated in the groove of ceramic matrix.
3. the novel electric power temperature measurement of cable conductor sensor based on FBG according to claim 1 is characterized in that: external diameter 3.5mm, internal diameter 3mm, the length 10cm of stainless-steel tube probe.
4. the novel electric power temperature measurement of cable conductor sensor based on FBG according to claim 1, it is characterized in that: the length of FC type optical interface is 5cm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201220629456.0U CN203132737U (en) | 2012-11-26 | 2012-11-26 | Novel power cable conductor temperature measuring sensor based on FBG (fiber Bragg grating) |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201220629456.0U CN203132737U (en) | 2012-11-26 | 2012-11-26 | Novel power cable conductor temperature measuring sensor based on FBG (fiber Bragg grating) |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203132737U true CN203132737U (en) | 2013-08-14 |
Family
ID=48940709
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201220629456.0U Expired - Fee Related CN203132737U (en) | 2012-11-26 | 2012-11-26 | Novel power cable conductor temperature measuring sensor based on FBG (fiber Bragg grating) |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203132737U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103076108A (en) * | 2012-11-26 | 2013-05-01 | 中国电力科学研究院 | Novel power cable conductor temperature measuring sensor based on FBG (fiber bragg grating) |
| CN113252209A (en) * | 2021-04-22 | 2021-08-13 | 北京航天控制仪器研究所 | High-temperature-resistant quick-response fiber grating temperature sensor implanted into vehicle brake |
-
2012
- 2012-11-26 CN CN201220629456.0U patent/CN203132737U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103076108A (en) * | 2012-11-26 | 2013-05-01 | 中国电力科学研究院 | Novel power cable conductor temperature measuring sensor based on FBG (fiber bragg grating) |
| CN113252209A (en) * | 2021-04-22 | 2021-08-13 | 北京航天控制仪器研究所 | High-temperature-resistant quick-response fiber grating temperature sensor implanted into vehicle brake |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103076108A (en) | Novel power cable conductor temperature measuring sensor based on FBG (fiber bragg grating) | |
| CN101949744B (en) | Fiber grating-based transformer internal temperature detection system | |
| CN103674117B (en) | Measure entirely method and device with weak optical fiber Bragg grating temperature and strain based on Raman scattering simultaneously | |
| CN201892586U (en) | Optical fiber grating-based internal temperature detection system for transformer | |
| CN109595470B (en) | Distributed pipeline detection method | |
| WO2014205996A1 (en) | Method for predicting the life of transformer based on fibre grating temperature measurement system | |
| WO2014101754A1 (en) | Multi-core optical fibre, sensing device adopting multi-core optical fibre and running method therefor | |
| CN201974251U (en) | Distributed optical fiber online temperature monitoring system for electric power cable | |
| CN108507697A (en) | A kind of sea water temperature depth profile sampling towed system based on Fibre Optical Sensor | |
| CN207147667U (en) | A kind of back-shaped strip sensor of carbon fiber prepreg encapsulation | |
| CN103033285A (en) | Simultaneous measurement method of temperature and strain of laid photoelectric composite cable | |
| CN102607634B (en) | Spatial resolution calibration device and calibration method for distributed fiber-optic sensing | |
| CN202075063U (en) | Fiber bragg grating temperature sensor for cable temperature measurement | |
| CN101818640A (en) | Fully distributed device and method for monitoring underground working temperature of oil-water well based on Raman scattered light time-domain reflectometer | |
| CN203132737U (en) | Novel power cable conductor temperature measuring sensor based on FBG (fiber Bragg grating) | |
| CN202511922U (en) | Oppc optical cable stress and carrying capacity measuring and calculating system | |
| CN101329203A (en) | Apparatus for measuring temperature of alternating current-direct current lightning arrestor | |
| CN203772449U (en) | Fiber temperature-measuring tape with high spatial resolution | |
| CN205229527U (en) | Power cable connects composite cable for temperature monitoring and monitoring system thereof | |
| CN204461643U (en) | A kind of fiber optic distributed temperature sensor and optical fiber distributed type temp measuring system | |
| CN200972732Y (en) | Optical fibre and optical fibre raster experimental instrument | |
| CN202631153U (en) | Single-port distributed optic fiber temperature sensor with automatic compensation function | |
| CN202693156U (en) | Spatial resolution calibration device for distributed fiber-optic sensing | |
| KR20160005847A (en) | Fiber Optic Raman OTDR with Fiber Bragg Gratings for Simultaneous Measurement of Temperature and Strain and Method for Sensing thereof | |
| CN100392454C (en) | Method and apparatus for sensing methane concentration based on optical fiber Bragg raster |
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 |
Granted publication date: 20130814 Termination date: 20151126 |