CN204575216U - Distributed optical fiber temperature measuring device - Google Patents
Distributed optical fiber temperature measuring device Download PDFInfo
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- CN204575216U CN204575216U CN201520206710.XU CN201520206710U CN204575216U CN 204575216 U CN204575216 U CN 204575216U CN 201520206710 U CN201520206710 U CN 201520206710U CN 204575216 U CN204575216 U CN 204575216U
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- optical fiber
- temperature
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- wavelength division
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Abstract
This product is a kind of new distribution type optical fibre temperature survey apparatus, this device comprises laser instrument, wavelength division multiplexer, calibration cell, photodetector, amplifier, data acquisition unit, data processing unit and host computer, it is according to the temperature effect of optical time domain reflection of optical fiber and optical fiber Raman scattering dorsad, detect the change of the temperature along optical fiber diverse location, realize the distributed measurement of temperature.Utilize the time interval of light velocity of wave propagation in optical fiber and optical echo dorsad simultaneously, position measurement can be positioned to measured temperature point.
Description
Technical field
The utility model belongs to optical-fiber temperature measuring field, particularly relates to a kind of distributed optical fiber temperature measuring device.
Background technology
Fibre Optical Sensor is not subject to the characteristics such as electromagnetic interference (EMI), non-conductive, transmission range is long because of it, is particularly suitable for the industry such as electric power, fire-fighting and uses.In addition, accurately can not determine warning place because conventional linear temperature sensing cable exists, delayed, the problem such as failure rate is high, rate of false alarm is high, the life-span is shorter of reporting to the police, cannot meet growing field demand at present.The utility model can solve the series of problems that conventional linear temperature sensing cable exists, and in real time, effectively can complete the surveying work of scene temperature, temperature rise.
Summary of the invention
Utility model object: the utility model provides a kind of distributed optical fiber temperature measuring device, its objective is the problem existing for solution mode in the past.
technical scheme: the utility model is achieved through the following technical solutions:
A kind of distributed optical fiber temperature measuring device, it is characterized in that: this device comprises laser instrument, wavelength division multiplexer, calibration cell, photodetector, amplifier, data acquisition unit, data processing unit and host computer, laser instrument connects wavelength division multiplexer, optical fiber is connected to photodetector by wavelength division multiplexer through calibration cell, photodetector is connected to data acquisition unit by amplifier, and data acquisition unit is connected to host computer by data processing unit.
advantage and effect:
This product is a kind of new distribution type optical fibre temperature survey apparatus, according to the temperature effect of the optical time domain reflection of optical fiber and optical fiber Raman scattering dorsad, and, detect the change of the temperature along optical fiber diverse location, realize the distributed measurement of temperature.Optical fiber is transmission medium and sensor in systems in which, residing for optical fiber, the temperature field of spatial points is modulated scattered light intensity, gather space temperature information through wavelength division multiplexer and photoelectric detector, then through signal transacting, after Demodulation Systems, temperature information is extracted in real time from noise.Utilize the time interval of light velocity of wave propagation in optical fiber and optical echo dorsad simultaneously, position measurement can be positioned to measured temperature point.
accompanying drawing illustrates:
Fig. 1 is structured flowchart of the present utility model.(preferably supplement an easy circuit diagram! )
embodiment:below in conjunction with accompanying drawing, the utility model is further described:
As shown in Figure 1, the utility model provides a kind of distributed optical fiber temperature measuring device, it is characterized in that: this device comprises laser instrument, wavelength division multiplexer, calibration cell, photodetector, amplifier, data acquisition unit, data processing unit and host computer, laser instrument connects wavelength division multiplexer, optical fiber is connected to photodetector by wavelength division multiplexer through calibration cell, photodetector is connected to data acquisition unit by amplifier, and data acquisition unit is connected to host computer by data processing unit.
Wherein: light source, optical fiber, wavelength division multiplexer belong to light path part, complete Laser emission, the functions such as the separation of stokes light and anti-Stokes light and transmission; Photodetector, amplifier, calibration cell, data acquisition unit belong to part of data acquisition, complete the function such as the pickup of stokes light and anti-Stokes light, reference temperature calibration, this part adopts FPGA technology, and integrated level is high, processing speed is fast, can ensure precision and the real-time of measurement; Data processing unit adopts embedded technology to complete the functions such as the process of temperature data, storage, analysis and display, and the main control part of this part adopts ARM9 chip, is responsible for communicating between each plate and with host computer.
2, systemic-function
Product concrete function is as follows:
1) real-time data acquisition: from monitoring area pointwise Real-time Collection temperature value, forms real-time data base;
2) realtime curve: show the temperature value collected in real time with numeral and curve driving;
3) temperature over-range is reported to the police: can arrange warning and early warning temperature, automatically produce warning when temperature reaches setting value;
4) temperature rise rate is reported to the police: when temperature sharply rises, automatically produce warning
5) the inquiry of historical data and display: user can according to time inquiring historical temperature data;
6) family curve display: history and the current temperature data that can show user's inquiry in graph form;
7) remote diagnosis: by the Internet, can carry out remote monitoring and diagnosis to field apparatus.
3, systematic technical indicator
Maximum measuring distance: 20 kilometers of port numbers: 1,2,4,6,8,16 optional (photoswitches)
Sample interval: 1 meter of positioning precision: 1 meter of Measuring Time: 20 seconds temperature resolutions: 0.5 DEG C
Digital output: 64 tunnels (easily extensible) communication interface: 2 485 interfaces, 1 Ethernet interface.
Claims (1)
1. a distributed optical fiber temperature measuring device, it is characterized in that: this device comprises laser instrument, wavelength division multiplexer, calibration cell, photodetector, amplifier, data acquisition unit, data processing unit and host computer, laser instrument connects wavelength division multiplexer, optical fiber is connected to photodetector by wavelength division multiplexer through calibration cell, photodetector is connected to data acquisition unit by amplifier, and data acquisition unit is connected to host computer by data processing unit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520206710.XU CN204575216U (en) | 2015-04-08 | 2015-04-08 | Distributed optical fiber temperature measuring device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520206710.XU CN204575216U (en) | 2015-04-08 | 2015-04-08 | Distributed optical fiber temperature measuring device |
Publications (1)
| Publication Number | Publication Date |
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| CN204575216U true CN204575216U (en) | 2015-08-19 |
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| CN201520206710.XU Active CN204575216U (en) | 2015-04-08 | 2015-04-08 | Distributed optical fiber temperature measuring device |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108507698A (en) * | 2018-05-15 | 2018-09-07 | 无锡中鼎集成技术有限公司 | Monitoring temperature alarm system in a kind of shelf |
| CN109540300A (en) * | 2018-12-21 | 2019-03-29 | 青岛汇安谷科技发展有限公司 | The online Subarea calibration method and device of DTS based on wireless temperature acquisition unit |
| CN111551280A (en) * | 2020-01-10 | 2020-08-18 | 河北华仁通电电气科技有限公司 | Temperature measurement system for distributed optical fiber and temperature measurement method thereof |
| CN112697303A (en) * | 2020-12-01 | 2021-04-23 | 太原理工大学 | Distributed optical fiber sensing system and detection method for smart grid |
| CN115219059A (en) * | 2022-07-05 | 2022-10-21 | 浙江大学 | OTDR optical fiber temperature measurement system with high spatial resolution |
-
2015
- 2015-04-08 CN CN201520206710.XU patent/CN204575216U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108507698A (en) * | 2018-05-15 | 2018-09-07 | 无锡中鼎集成技术有限公司 | Monitoring temperature alarm system in a kind of shelf |
| CN109540300A (en) * | 2018-12-21 | 2019-03-29 | 青岛汇安谷科技发展有限公司 | The online Subarea calibration method and device of DTS based on wireless temperature acquisition unit |
| CN111551280A (en) * | 2020-01-10 | 2020-08-18 | 河北华仁通电电气科技有限公司 | Temperature measurement system for distributed optical fiber and temperature measurement method thereof |
| CN112697303A (en) * | 2020-12-01 | 2021-04-23 | 太原理工大学 | Distributed optical fiber sensing system and detection method for smart grid |
| CN115219059A (en) * | 2022-07-05 | 2022-10-21 | 浙江大学 | OTDR optical fiber temperature measurement system with high spatial resolution |
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