CN207036296U - A kind of optical cable temperature measurement early warning system based on DTS - Google Patents
A kind of optical cable temperature measurement early warning system based on DTS Download PDFInfo
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- CN207036296U CN207036296U CN201721049011.4U CN201721049011U CN207036296U CN 207036296 U CN207036296 U CN 207036296U CN 201721049011 U CN201721049011 U CN 201721049011U CN 207036296 U CN207036296 U CN 207036296U
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Abstract
It the utility model is related to electric detection technique field, in particular a kind of optical cable temperature measurement early warning system based on DTS, including wideband light source, photo-coupler, fiber-optic grating sensor, DTS engineering machines, the wideband light source is connected to photo-coupler by optoisolator, the photo-coupler is connected to cable under test, demodulation module, the DTS engineering machines are connected with demodulation module, the fiber-optic grating sensor is also associated with amplification module, the amplification module includes power splitter, fiber amplifier and optical filter, the power splitter input connects fiber-optic grating sensor, output end is connected with fiber amplifier, the fiber amplifier is connected with optical filter；The optical filter is connected to photo-coupler.The utility model, accurate to the temperature detection of cable under test, communication distance is remote.
Description
Technical field
It the utility model is related to electric detection technique field, specially a kind of optical cable temperature measurement early warning system based on DTS.
Background technology
Substantial amounts of power cable and control cable are laid with the large size industrial enterprises such as power plant, transformer station, and connects height
Compress switch cabinet.These cable distributions respectively connected each electrical equipment in cable tunnel, cable testing bridge, cable interlayer, and
It is connected to control room, and cable typically concentrates laying, occurs very harmful after Cable Firing Accident.For operating electricity
Cable, find that heat spot (the particularly cable connector of accident potential) and other environmental abnormalities have important meaning to safe operation in time
Justice.
The cable temperature monitoring of existing line style thermometry, with electrical measurement：Optical fiber light is transmitted into by wideband light source
Gate sensor, the light reflected using detection from matched fiber grating sensor are converted into ultra-weak electronic signal, carry out detection temperature；
But there are the following problems：The light reflected from fiber-optic grating sensor is fainter, the precision to being converted into photosignal
There is large effect, while the faint size of electric signal is not converted into carry out feedback regulation to reflected light size according to light.
Utility model content
The purpose of this utility model is the cable temperature measurement early warning system for providing a kind of DTS, to solve above-mentioned background technology
The problem of middle proposition.There is the cable temperature measurement early warning system of the DTS reflected light by amplification module processing to make demodulation module
Opto-electronic conversion precision is improved, has obtained more accurate measurement result；PID modules are converted into according to the light of signal conditioner simultaneously
The faint size of electric signal, adjust the characteristics of amplification of the fiber amplifier to reflected light exports.
To achieve the above object, the utility model provides following technical scheme：
A kind of optical cable temperature measurement early warning system based on DTS, including wideband light source, photo-coupler, DTS engineering machines, the width
Band light source is connected to photo-coupler by optoisolator, and the photo-coupler is connected to cable under test, demodulation module, described
DTS engineering machines are connected with demodulation module,
Also include the fiber-optic grating sensor for being connected to the cable under test, the fiber-optic grating sensor is also associated with putting
Big module, the amplification module include power splitter, fiber amplifier and optical filter, and the power splitter input connects optical fiber
Grating sensor, output end are connected with fiber amplifier, and the fiber amplifier is connected with optical filter；The optical filter connects
It is connected to photo-coupler.
Preferably, the demodulation module includes optical-electrical converter, the signal conditioner being sequentially connected with it and a/d converter.
Preferably, system also includes PID modules, and the PID modules are connected with signal conditioner, also connected by communication module
It is connected to fiber amplifier.
Preferably, the DTS engineering machines are connected with the alarm module for cable temperature warning.
Preferably, the fiber-optic grating sensor uses bragg grating sensors.
Preferably, the communication module is GPRS module, 3G module or 4G modules, and respectively with PID modules, amplification mould
Built-in radio receiving transmitting module communication connection in block.
Compared with prior art, the beneficial effects of the utility model are：Wideband light source transmitter launches light, the light sent
Enter grating temperature sensor by optoisolator, photo-coupler, fiber-optic grating sensor and cable under test outer tube wall is abundant
Contact, when incident light matches completely with the centre wavelength of fiber-optic grating sensor back wave, fiber-optic grating sensor is to optocoupler
Clutch reflected light, power splitter of these reflected lights again in amplified module are sent to fiber amplifier and are amplified, filtered by light
After device carries out wavelength selection, noise filtering, gain balance, then through photo-coupler enter demodulation module, demodulation module is to reflected light
Wavelength-division processing is carried out, opto-electronic conversion is then carried out, measurement result is obtained by analog-to-digital conversion and Digital Signal Processing, and by DTS
Engineering machine control alarm module carries out temperature warning；The reflected light handled by amplification module makes demodulation module improve photoelectricity turn
Precision is changed, has obtained more accurate measurement result；It is faint big according to the light of signal conditioner to be converted into electric signal for PID modules simultaneously
It is small, amplification output of the regulation fiber amplifier to reflected light.
Brief description of the drawings
Fig. 1 is the utility model structure diagram；
Fig. 2 be the utility model amplification module and with each part connection diagram.
In figure：1 wideband light source, 2 optoisolators, 3 photo-couplers, 4 fiber-optic grating sensors, 5 amplification modules, 6 solution mode transfers
Block, 7DTS engineering machines, 8PID modules, 9 communication modules, 10 alarm modules.
Embodiment
Below in conjunction with the accompanying drawing in the utility model embodiment, the technical scheme in the embodiment of the utility model is carried out
Clearly and completely describing, it is clear that described embodiment is only the utility model part of the embodiment, rather than whole
Embodiment.Based on the embodiment in the utility model, those of ordinary skill in the art are not under the premise of creative work is made
The every other embodiment obtained, belong to the scope of the utility model protection.
Fig. 1~2 are referred to, the utility model provides a kind of technical scheme：
A kind of optical cable temperature measurement early warning system based on DTS, including wideband light source 1, photo-coupler 3, DTS engineering machines 7, it is described
Wideband light source 1 is connected to photo-coupler 3 by optoisolator 2, and using ADuM320x, the photo-coupler 3, which is connected to, to be treated
Survey cable, built-in optical fiber, the demodulation module 6 being connected with photo-coupler 3 of cable under test, the DTS engineering machines 7 and demodulation module 6
Connection, the demodulation module 6 include optical-electrical converter, the signal conditioner being sequentially connected with it and a/d converter, DTS engineering machines
7 be both used as signal transmission by photo-coupler 3, demodulation module 6 according to temperature sensing optical fiber also serves as DTS engineering machines 7 and utilizes Anti-
Stokes and Stokes light intensity ratio has accurately reflected cable under test temperature information；
Also include the fiber-optic grating sensor 4 for being connected to the cable under test, the fiber-optic grating sensor 4 uses
Bragg grating sensors, it is in light weight, small volume, do not corroded, be not also connected with by electromagnetic interference, the fiber-optic grating sensor 4
There is amplification module 5, the amplification module 5 includes power splitter, fiber amplifier and optical filter, and the power splitter input connects
Fiber-optic grating sensor 4 is connect, output end is connected with fiber amplifier, and the fiber amplifier is connected with optical filter；The light
Wave filter is connected to photo-coupler 3.
System also includes PID modules 8, and the PID modules 8 are connected with signal conditioner, are also connected to by communication module 9
Fiber amplifier, the communication module 9 are GPRS module, 3G module or 4G modules, and respectively with PID modules 8, amplification module
The communication connection of built-in radio receiving transmitting module, using transmission of wireless signals, enhances telemeasurement while anti-electromagnetism is done in 5
Disturb.
The DTS engineering machines 7 are connected with the alarm module 10 for cable temperature warning, when the cable under test of actual measurement (connects
Head) temperature when exceeding default alarm temperature value, sends alarm, to prompt staff, improves practicality of the present utility model.
The transmitter of wideband light source 1 launches light, and the light sent enters grating temperature by optoisolator 2, photo-coupler 3
Sensor is spent, fiber-optic grating sensor 4 is fully contacted with cable under test outer tube wall, when incident light and fiber-optic grating sensor 4
When the centre wavelength of back wave matches completely, fiber-optic grating sensor 4 is to the reflected light of photo-coupler 3；
Power splitter of these reflected lights again in amplified module 5 is sent to fiber amplifier and is amplified, by optical filter
After carrying out wavelength selection, noise filtering, gain balance, then through photo-coupler 3 enter demodulation module 6, the signal in demodulation module 6
Conditioner carries out wavelength-division processing to reflected light, then carries out opto-electronic conversion, then analog-to-digital conversion and numeral letter by a/d converter
Number processing obtains measurement result, and controls alarm module 10 to carry out temperature warning by DTS engineering machines 7；
The reflected light handled by amplification module 5 makes demodulation module 6 improve opto-electronic conversion precision, has obtained more accurate
Measurement result；PID modules 8 are converted into the faint size of electric signal according to the light of signal conditioner simultaneously, adjust fiber amplifier pair
The amplification output of reflected light.
Optical-electrical converter is sampled preferably using MSP430 single-chip microcomputers as core using the a/d converter of 12 to data,
So that system hardware circuit is more integrated, miniaturization, MSP430 single-chip microcomputers are changed using the optical signal of fiber-optic grating sensor 4
For electric signal, circuit that its output current is made up of amplifier (with reference to the photodetection amplifying circuit of faint optical signal design _
Li Peng) suitable voltage signal is converted into, to control a/d converter to export, signal condition is carried out by signal conditioner, on the one hand
Amplification module 5 is sent into by PID modules 8 the faint size of electric signal is converted into according to the light of signal conditioner, adjust fiber amplifier
Amplification output of the device to reflected light, is on the other hand sent into the reading of DTS engineering machines 7 cable under test temperature and (has accurately reflected electricity to be measured
Cable temperature information) and be locally displayed；Collection terminal program built in DTS engineering machines 7 and analysis end program, two sort run platforms
For WIN7 or more systems, by being communicated with signal acquisition process card-optical-electrical converter, read card-like state, transmitting light data,
Reflected light data, by computing, the temperature of test point on cable under test is calculated, is sent to analysis end program, and locally aobvious
Show, these data are managed by DTS engineering machines 7, to realize analysis, alarm, real-time display and query function.
While there has been shown and described that embodiment of the present utility model, for the ordinary skill in the art,
It is appreciated that these embodiments can be carried out with a variety of changes in the case where not departing from principle of the present utility model and spirit, repaiied
Change, replace and modification, the scope of the utility model are defined by the appended claims and the equivalents thereof.
Claims (6)
1. a kind of optical cable temperature measurement early warning system based on DTS, including wideband light source, photo-coupler, DTS engineering machines, the broadband
Light source is connected to photo-coupler by optoisolator, and the photo-coupler is connected to cable under test, demodulation module, described
DTS engineering machines are connected with demodulation module, it is characterised in that：
Also include the fiber-optic grating sensor for being connected to the cable under test, the fiber-optic grating sensor is also associated with amplifying mould
Block, the amplification module include power splitter, fiber amplifier and optical filter, and the power splitter input connects fiber grating
Sensor, output end are connected with fiber amplifier, and the fiber amplifier is connected with optical filter；The optical filter is connected to
Photo-coupler.
A kind of 2. optical cable temperature measurement early warning system based on DTS according to claim 1, it is characterised in that：The solution mode transfer
Block includes optical-electrical converter, the signal conditioner being sequentially connected with it and a/d converter.
A kind of 3. optical cable temperature measurement early warning system based on DTS according to any one of claim 1~2, it is characterised in that：System
System also includes PID modules, and the PID modules are connected with signal conditioner, are also connected to fiber amplifier by communication module.
A kind of 4. optical cable temperature measurement early warning system based on DTS according to claim 1, it is characterised in that：The DTS engineerings
Machine is connected with the alarm module for cable temperature warning.
A kind of 5. optical cable temperature measurement early warning system based on DTS according to claim 1, it is characterised in that：The optical fiber light
Gate sensor uses bragg grating sensors.
A kind of 6. optical cable temperature measurement early warning system based on DTS according to claim 3, it is characterised in that：The communication mould
Block is GPRS module, 3G module or 4G modules, and is led to respectively with radio receiving transmitting module built-in in PID modules, amplification module
Letter connection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721049011.4U CN207036296U (en) | 2017-08-21 | 2017-08-21 | A kind of optical cable temperature measurement early warning system based on DTS |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721049011.4U CN207036296U (en) | 2017-08-21 | 2017-08-21 | A kind of optical cable temperature measurement early warning system based on DTS |
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| Publication Number | Publication Date |
|---|---|
| CN207036296U true CN207036296U (en) | 2018-02-23 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721049011.4U Expired - Fee Related CN207036296U (en) | 2017-08-21 | 2017-08-21 | A kind of optical cable temperature measurement early warning system based on DTS |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112923850A (en) * | 2021-01-28 | 2021-06-08 | 浙江吉利控股集团有限公司 | Method for analyzing automobile DTS measurement data |
-
2017
- 2017-08-21 CN CN201721049011.4U patent/CN207036296U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112923850A (en) * | 2021-01-28 | 2021-06-08 | 浙江吉利控股集团有限公司 | Method for analyzing automobile DTS measurement data |
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| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180223 Termination date: 20180821 |
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| CF01 | Termination of patent right due to non-payment of annual fee |