CN205670054U - A kind of optical fiber distributed type temperature measuring device for high-voltage cable - Google Patents
A kind of optical fiber distributed type temperature measuring device for high-voltage cable Download PDFInfo
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- CN205670054U CN205670054U CN201620544560.8U CN201620544560U CN205670054U CN 205670054 U CN205670054 U CN 205670054U CN 201620544560 U CN201620544560 U CN 201620544560U CN 205670054 U CN205670054 U CN 205670054U
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Abstract
A kind of optical fiber distributed type temperature measuring device for high-voltage cable, including pulse laser, light wavelength division multiplexing, temperature measuring optical cable, binary channels synchronous digital capture card and CPU, the output of described pulse laser connects the common port of light wavelength division multiplexing；The output of light wavelength division multiplexing connects the input of Stokes photo-detector and the input of anti-Stokes photo-detector respectively；The output of the output of Stokes photo-detector and anti-Stokes photo-detector connects the input of binary channels synchronous digital capture card；The output of binary channels synchronous digital capture card connects the input of CPU；Temperature measuring optical cable connects the port of light wavelength division multiplexing；The utility model uses optical fiber as temperature element, has not charged, far measuring distance, not by features such as electromagnetic interference, is suitable for using under complex environment；Cable body temperature, accurate positioning can be measured continuously, find high temperature dot in time, greatly facilitate the maintenance work that power cable is in operation, be worth promoting.
Description
Technical field
The utility model relates to Temperature of Power Cables monitoring technical field, and especially a kind of optical fiber distributed type high-tension cable is surveyed
Temperature device.
Background technology
The safety of high-tension cable is very important for supply of electric power.In During Process of Long-term Operation, high-tension cable
External heat fault refer mainly to each node due to reasons such as junction contacts are bad, under the big function of current, connector temperature raises, and connects
Resistance of getting an electric shock increases, and vicious circle causes potential safety hazard.
The cable thermometric mode commonly used in the market has a following two: the digital thermometric of monobus and wireless temperature measurement.
Monobus digital thermometric pluses and minuses: networking is layouted flexibly, applied range.The cable duct of applicable 1 km/
The monitoring at the first-class position of road, cable intermediate joint, cable termination.Also it is used in the place much needing to lay point for measuring temperature to enter simultaneously
Trip temperature monitoring (temperature survey at the node such as low-voltage cabinet, motor, water pump, transformer), but this technology be not suitable for long away from
From cable detection, and arrange that temperature sensor is also relatively complicated.
Wireless temperature measurement pluses and minuses: this kind of mode is suitable for spatial temperature survey, are not suitable for using in long and narrow region, than
In saying cable duct, cable interlayer, cable tunnel.Because the cable at these positions is typically all closure, the earth or build
Build thing body of wall and itself constitute a screen layer, insensitive to wireless signal, so using this kind of mode to measure conduit line etc.
Position is not suitably to select very much.Another reason be exactly in conduit line power taking cannot use CT induction mode or solar energy
Battery system power taking, uses lithium battery as the working power of sensor, and lithium battery has capacity limit, sends data power consumption in real time
Quickly, all later maintenance are very big workloads.
Content of the invention
The utility model aims to provide one and can be obtained by along optical fiber as sensing media, one-shot measurement using optical fiber itself
Thousands of somes temperature informations of distribution, it is achieved that continuous distributed formula is measured, and reduces uncertainty of measurement；Far measuring distance, measurement
Time is short, is suitable for remote real-time monitoring；Highly sensitive, certainty of measurement is high, and rate of false alarm, rate of failing to report are low；Corrosion-resistant, water-fast, fire-resistant,
Electromagnetic interference immunity, reliability is high, the low optical fiber distributed type temperature measuring device for high-voltage cable of maintenance cost.
For achieving the above object, the following technical scheme of the utility model offer: a kind of optical fiber distributed type high-tension cable thermometric
Device, including pulse laser, light wavelength division multiplexing, temperature measuring optical cable, Stokes photo-detector, anti-Stokes optical detection
Device, binary channels synchronous digital capture card and CPU, the output of described pulse laser connects the common port of light wavelength division multiplexing；
The output of light wavelength division multiplexing connects the input of Stokes photo-detector and the defeated of anti-Stokes photo-detector respectively
Enter end；The output of the output of Stokes photo-detector and anti-Stokes photo-detector connects binary channels synchronous digital and adopts
The input of truck；The output of binary channels synchronous digital capture card connects the input of CPU；It is multiple that temperature measuring optical cable connects light wavelength-division
With the port of device.
As further scheme of the present utility model: the output of described CPU connects input and the warning of display module
The input of output module.
As further scheme of the present utility model: described temperature measuring optical cable is laid on tested high-tension cable, and uses band
Tighten.
Compared with prior art, the beneficial effects of the utility model are: the utility model uses optical fiber as temperature element,
There is not charged, far measuring distance, not by features such as electromagnetic interference, be suitable for using under complex environment；This use is novel also to be used
Optical time domain reflection technology, can measure cable body temperature, accurate positioning continuously, find high temperature dot in time, greatly facilitate
The maintenance work that power cable is in operation, solves the real time temperature monitoring problem of power cable, it is ensured that supply of electric power is pacified
Entirely, it is worth promoting.
Brief description
Fig. 1 is Raman scattering temperature-measurement principle figure of the present utility model；
Fig. 2 is structured flowchart of the present utility model.
Detailed description of the invention
Below in conjunction with the accompanying drawing in the utility model embodiment, the technical scheme in the utility model embodiment is carried out
Clearly and completely describe, it is clear that described embodiment is only a part of embodiment of the utility model, 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 making creative work
The every other embodiment being obtained, broadly falls into the scope of the utility model protection.
Refer to Fig. 1-2, in the utility model embodiment, a kind of optical fiber distributed type temperature measuring device for high-voltage cable, including arteries and veins
Rush laser instrument the 1st, light wavelength division multiplexing the 2nd, temperature measuring optical cable the 3rd, Stokes photo-detector the 4th, anti-Stokes photo-detector the 5th, bilateral
Road synchronous digital capture card the 6th, CPU7, display module 8 and alarm output module 9, the output of described pulse laser 1 connects light
The common port of wavelength division multiplexer 2；The output of light wavelength division multiplexing 2 connects Stokes photo-detector 4 and anti-stoke respectively
The input of this photo-detector 5；The output of Stokes photo-detector 4 and anti-Stokes photo-detector 5 connects binary channels
The input of synchronous digital capture card 6；The output of binary channels synchronous digital capture card 6 connects the input of CPU7；CPU7's
Output connects the input of display module 8 and the input of alarm output module 9；Temperature measuring optical cable 3 connects light wavelength division multiplexing 2
Port, be laid on tested high-tension cable 10, and tightened by band.
The novel middle use Raman scattering principle detection temperature of this use, its principle is as it is shown in figure 1, work as the light having wavelength to be λ 0
After injection fibre, Raman scattering effect can be produced, produce frequency displacement, formed wavelength be respectively λ 1 and λ 2 stokes light and anti-this
Lentor light, the anti-Stokes light wherein reflecting is relevant with temperature, and stokes light is temperature independent.
For eliminating the influence of fluctuations of laser power in the utility model, CPU7 is obtained by double channel data acquisition card
After stokes light and anti-Stokes photovoltage, calculating with formula 1, formula 1 is as follows:
Wherein:
V is result of calculation；
V1 is the anti-Stokes photovoltage detecting；
V2 is the Stokes photovoltage detecting.
Result of calculation V is related to temperature, and V also changes when the temperature is changed, after V and temperature are calibrated,
By the temperature value that is worth to of detection V, thus realize the real-time monitoring of temperature；
The utility model use optical time domain reflection technology carry out Distance positioning, by direct impulse light biography in a fiber
Calculating distance between sowing time, such that it is able to positioning, light flight distance calculation formula in a fiber is as follows:
Wherein C is light spread speed in a fiber；
T is the propagation time of light；
L is propagation distance within the t time for the light.
Because the utility model uses the light reflecting from optical fiber, it is possible to by formula 3 to tested
The temperature spot of cable positions:
Wherein L0 is the position of tested high-tension cable 10 temperature spot that temperature measuring optical cable 3 detects.
Operation principle of the present utility model and using method thereof: the pulse laser that wavelength is λ 0 launched by pulse laser 1
After, enter after light wavelength division multiplexing 2 in the temperature measuring optical cable 3 being laid on tested high-tension cable 10, meeting in temperature measuring optical cable 3
Produce Raman scattering effect (as shown in Figure 1), the stokes light λ 1 that light wavelength division multiplexing 2 will reflect back into and anti-Stokes
Light λ 2 separates, and is converted into the signal of telecommunication by Stokes photo-detector 4 and 5 optical signals of anti-Stokes photo-detector respectively, double
Channel Synchronous Data Acquisition Card 6 collects two path signal simultaneously, and CPU7 receives the data in binary channels simultaneous data-acquisition
After collection, carry out being calculated the signal of telecommunication relevant with temperature according to formula 1, enter row distance according to formula 2 and formula 3 fixed simultaneously
Position, CPU7 is shown the temperature information after calculating by display module 8, during real-time monitoring, if temperature surpasses
Cross setting alarming value, then by alarm output module 9 will output alarm signal, process overtemperature situation in time, ensure tested high pressure
Cable 10 properly functioning.
The utility model makes to measure high-tension cable temperature with light Raman scattering techniques, solves city mesohigh service cable
The real-time monitoring problem of temperature；All using temperature measuring optical cable 3 to measure temperature, optical signal has to transmit in optical cable not to be done by electromagnetism
Disturbing, not affected by extraneous adverse circumstances, long transmission distance, it is not necessary to the features such as remote power-feeding, in high-tension cable tunnel, city
Temperature monitoring in there is very strong Necessity and feasibility.
This use novel use optical time domain reflection technology, can be accurately positioned the distance of heat generating spot, solves lookup trouble point
The problem of difficulty, positioning precision can reach one meter, improves the maintenance efficiency of high-tension cable.
It is obvious to a person skilled in the art that the utility model is not limited to the details of above-mentioned one exemplary embodiment, and
And in the case of without departing substantially from spirit or essential attributes of the present utility model, can realize that this practicality is new in other specific forms
Type.Therefore, no matter from the point of view of which point, all should regard embodiment as exemplary, and be nonrestrictive, this practicality is new
The scope of type is limited by claims rather than described above, it is intended that the containing of equivalency that will fall in claim
All changes in justice and scope are included in the utility model.Any reference in claim should be considered as limiting
Involved claim.
Although moreover, it will be appreciated that this specification is been described by according to embodiment, but not each embodiment only wraps
Containing an independent technical scheme, this narrating mode of specification is only that for clarity sake those skilled in the art should
Using specification as an entirety, the technical scheme in each embodiment also can form those skilled in the art through appropriately combined
May be appreciated other embodiments.
Claims (3)
1. an optical fiber distributed type temperature measuring device for high-voltage cable, including pulse laser (1), light wavelength division multiplexing (2), temperature measuring optical
Cable (3), Stokes photo-detector (4), anti-Stokes photo-detector (5), binary channels synchronous digital capture card (6) and CPU
(7), it is characterised in that the output of described pulse laser (1) connects the common port of light wavelength division multiplexing (2)；Light wavelength-division is multiple
Connect the input of Stokes photo-detector (4) and the defeated of anti-Stokes photo-detector (5) with the output of device (2) respectively
Enter end；The output of the output of Stokes photo-detector (4) and anti-Stokes photo-detector (5) connects binary channels synchronization
The input of Data Acquisition Card (6)；The output of binary channels synchronous digital capture card (6) connects CPU(7) input；Thermometric
Optical cable (3) connects the port of light wavelength division multiplexing (2).
2. optical fiber distributed type temperature measuring device for high-voltage cable according to claim 1, it is characterised in that described CPU(7) defeated
Go out end and connect the input of display module (8) and the input of alarm output module (9).
3. optical fiber distributed type temperature measuring device for high-voltage cable according to claim 1, it is characterised in that described temperature measuring optical cable
(3) it is laid on tested high-tension cable (10), and tightened by band.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201620544560.8U CN205670054U (en) | 2016-06-04 | 2016-06-04 | A kind of optical fiber distributed type temperature measuring device for high-voltage cable |
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| CN201620544560.8U CN205670054U (en) | 2016-06-04 | 2016-06-04 | A kind of optical fiber distributed type temperature measuring device for high-voltage cable |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109211431A (en) * | 2018-08-27 | 2019-01-15 | 青岛益堃达热能设备有限公司 | Distributed fiber optic temperature monitoring method and system |
| CN111474509A (en) * | 2020-04-25 | 2020-07-31 | 江苏亨通电力电缆有限公司 | Cable early warning monitoring test platform |
| CN114198645A (en) * | 2021-12-17 | 2022-03-18 | 天津求实飞博科技有限公司 | Heating power pipeline leakage monitoring system |
| CN116183056A (en) * | 2023-04-28 | 2023-05-30 | 廊坊开发区中油新星电信工程有限公司 | Online monitoring and early warning system based on distributed optical fiber transmission |
-
2016
- 2016-06-04 CN CN201620544560.8U patent/CN205670054U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109211431A (en) * | 2018-08-27 | 2019-01-15 | 青岛益堃达热能设备有限公司 | Distributed fiber optic temperature monitoring method and system |
| CN111474509A (en) * | 2020-04-25 | 2020-07-31 | 江苏亨通电力电缆有限公司 | Cable early warning monitoring test platform |
| CN114198645A (en) * | 2021-12-17 | 2022-03-18 | 天津求实飞博科技有限公司 | Heating power pipeline leakage monitoring system |
| CN116183056A (en) * | 2023-04-28 | 2023-05-30 | 廊坊开发区中油新星电信工程有限公司 | Online monitoring and early warning system based on distributed optical fiber transmission |
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