CN203298900U - Distributed optical fiber temperature sensor system capable of correcting temperature automatically on site - Google Patents
Distributed optical fiber temperature sensor system capable of correcting temperature automatically on site Download PDFInfo
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- CN203298900U CN203298900U CN2013203901617U CN201320390161U CN203298900U CN 203298900 U CN203298900 U CN 203298900U CN 2013203901617 U CN2013203901617 U CN 2013203901617U CN 201320390161 U CN201320390161 U CN 201320390161U CN 203298900 U CN203298900 U CN 203298900U
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Abstract
The utility model discloses a distributed optical fiber temperature sensor system capable of correcting temperature automatically on site. The distributed optical fiber temperature sensor system comprises a DTS host and a temperature correcting module (10) connected with the DTS host. According to the distributed optical fiber temperature sensor system provided by the utility model, the DTS host is connected with the temperature correcting module, when the temperature needs to be corrected, a temperature measuring module in the DTS host can display the real-time temperature of the temperature correcting module and regulate the temperature calculation parameter automatically to meet the requirement on the accuracy of the temperature, so that the current situations that the judgment is made artificially by experience and the parameters of an optical fiber are manually configured are effectively improved, the calculation accuracy of the temperature of the system is increased, and the investment on manpower and material resources is greatly reduced.
Description
Technical field
The utility model relates to a kind of temperature sensing device, particularly a kind of can be on-the-spot the distributed optical fiber temperature sensing device of automatic temperature-adjusting calibration.
Background technology
Distributed optical fiber temperature sensing system utilizes optical time domain reflection technology and Raman scattering technology, may detect optical fiber and lay the temperature information of all positions along the line, the longest connection fiber lengths of single channel reaches 30km, therefore the fire alarm that is widely used in tunnel, colliery, electric system is reported to the police, in the real time temperature monitoring of petroleum and petrochemical sector, become the development trend of temperature monitoring technology, had wide market outlook.
Existing distributed optical fiber temperature sensing system is comprised of main frame and optical fiber two parts, and optical fiber is connected on main frame by fiber adapter, and the difference of the joints of optical fibre, fiber adapter and fiber type all can affect the Temperature numerical of calculating.Front main frame has been provided with the necessary parameter of normal operation although dispatch from the factory, but still need the situ configuration parameter according to the actual conditions of using field optical fibers connector and optical fiber, and along with system increased in the time that industry spot is used, the deviation of system-computed temperature value and actual temperature value can be increasing.The method of on-site parameters configuration at present has two kinds, and a kind of is heating water in container, and thermometer is placed on reading in hot water; A kind of is that water bath is heated to fixed temperature, and equitemperature is stablized laggard line parameter and proofreaied and correct.Parameter correction needs the professional to carry out, and fully rule of thumb manually the numerical value of input likely causes temperature computation inaccurate, causes false alarm.Also someone has proposed a kind of field calibration device and method, is convenient to execute-in-place, but still needs manually according to actual test value, to revise parameter.
The utility model content
The purpose of this utility model is, a kind of distributed optical fiber temperature sensing system that can on-the-spot automatic temperature-adjusting calibration is provided.The utility model can effectively improve the present situation of present artificial judgment by rule of thumb and manual configuration optical fiber parameter, has improved the accuracy that system temperature calculates, and greatly reduces the input of manpower and materials.
The technical solution of the utility model: a kind of can be on-the-spot the distributed optical fiber temperature sensing system of automatic temperature-adjusting calibration, it is characterized in that: comprise DTS main frame and the temperature correction module that is connected with the DTS main frame.
In aforesaid distributed optical fiber temperature sensing system, described temperature correction is connected with the DTS main frame through the connecting line of 2 cores or 3 cores with module.
In aforesaid distributed optical fiber temperature sensing system, described temperature correction comprises the cylindrical cavity of uncovered with module, and the cylindrical cavity inner bottom part is embedded with temperature sensor.
In aforesaid distributed optical fiber temperature sensing system, described temperature sensor is digital temperature sensor.
in aforesaid distributed optical fiber temperature sensing system, described DTS main frame comprises shell, in shell, be provided with laser instrument, the input end of laser instrument is connected with the output terminal of laser instrument driver module, the output terminal of laser instrument is connected with the input end of light splitting filtration module, the output terminal of light splitting filtration module is connected with the input end of optical fiber and two photoelectric conversion modules, the output terminal of photoelectric conversion module is connected with the input end of signal processing module, an output terminal of signal processing module is connected with the input end of data acquisition unit, the output terminal of data acquisition unit is connected with computer processing module, signal processing module has an output terminal to be connected with the input end of laser instrument driver module, signal processing module has an input end to be connected with module is unidirectional with temperature correction, signal processing module also is provided with a port, with computer processing unit is two-way, be connected.
In aforesaid distributed optical fiber temperature sensing system, in described computer processing unit, be provided with the DTS temperature measurement module.
Compared with prior art, the utility model is by being connected with temperature correction the DTS main frame with module, when needs carry out temperature correction, temperature measurement module in the DTS main frame can be calibrated the real time temperature with module by displays temperature, and automatically the temperature computation parameter is adjusted, with the requirement of satisfied temperature accuracy, thereby effectively improved now the present situation of artificial judgment and manual configuration optical fiber parameter by rule of thumb, improve the accuracy that system temperature calculates, greatly reduced the input of manpower and materials.The utility model also has following advantage:
1. temperature correction is small and exquisite, simple in structure with the module volume, is easy to carry, and not limited by operating space;
2. do not need the professional to operate, the parameter automatic calibration;
3. improve the accuracy of accounting temperature, avoided because parameter arranges the wrong report that problem causes and fails to report, be conducive to the extensively universal of distributed optical fiber temperature sensing system.
The accompanying drawing explanation
Fig. 1 is structural representation of the present utility model.
Being labeled as in accompanying drawing: 1-laser instrument, 2-laser instrument driver module, 3-light splitting filtration module, 4-optical fiber, the 5-photoelectric conversion module, the 6-signal processing module, 7-data acquisition unit, 8-computer processing module, the 9-system shell, 10-temperature correction module, 11-temperature sensor, 12-cylindrical cavity.
Embodiment
Below in conjunction with drawings and Examples, the utility model is further described, but not as the foundation to the utility model restriction.
Embodiment.A kind of can be on-the-spot the distributed optical fiber temperature sensing system of automatic temperature-adjusting calibration, form as shown in Figure 1 the temperature correction use module 10 that comprises the DTS main frame and is connected with the DTS main frame.
Reasonable is that described temperature correction is connected with the DTS main frame through the connecting line of 2 cores or 3 cores with module 10.
Described temperature correction comprises the cylindrical cavity 12 of uncovered with module 10, cylindrical cavity 12 inner bottom parts are embedded with temperature sensor 11.Reasonablely be.Described temperature sensor 11 is digital temperature sensors.
described DTS main frame comprises shell 9, in shell 9, be provided with laser instrument 1, the input end of laser instrument 1 is connected with the output terminal of laser instrument driver module 2, the output terminal of laser instrument (1) is connected with the input end of light splitting filtration module 3, the output terminal of light splitting filtration module 3 is connected with the input end of optical fiber 4 and two photoelectric conversion modules 5, the output terminal of photoelectric conversion module 5 is connected with the input end of signal processing module 6, an output terminal of signal processing module 6 is connected with the input end of data acquisition unit 7, the output terminal of data acquisition unit 7 is connected with computer processing module 8, signal processing module 6 has an output terminal to be connected with the input end of laser instrument driver module 2, signal processing module 6 has an input end to be connected with module 10 is unidirectional with temperature correction, signal processing module 6 also is provided with a port, with computer processing unit 8 is two-way, be connected.
In described computer processing unit 8, be provided with the DTS temperature measurement module.
When needs carried out temperature correction, temperature measurement module can be calibrated the real time temperature with module by displays temperature, and automatically the temperature computation parameter is adjusted, with the requirement of satisfied temperature accuracy.
At the temperature-measuring optical fiber front end, arbitrarily get the optical fiber of the length that meets the requirements, be coiled into after volume and put into temperature correction with module, pour hot water into, the DTS main frame can read the temperature of testing fiber place environment automatically, and the trip temperature calculating parameter of going forward side by side is proofreaied and correct.
Concrete process of the test is as follows:
When scene needs temperature correction, on DTS main frame temperature measurement module, select temperature correction, enter the temperature correction state.Connect the calibration fiber module to the DTS main frame, at the temperature-measuring optical fiber front end
The optical fiber of the length that meets the requirements is arbitrarily got in position, is coiled into the rear tiling of volume and puts into temperature correction with module, pours hot water into, and water temperature gets final product higher than environment temperature, is made as
.
On temperature measurement module, click and carry out temperature correction, computer processing module sends a synchronizing signal simultaneously to laser instrument driver module and data acquisition module, the laser instrument driver module starts drive laser and sends pulse laser, and data acquisition module starts image data simultaneously.Pulse laser is input in the photoswitch of respective channel through the light splitting filtration module, is connected to the temperature measuring optical cable of back.Raman scattering can constantly occur in temperature measuring optical cable, Raman scattering signal pathway photoswitch enters into the light splitting filtration module dorsad, needed stokes light and anti-Stokes light enter different photoelectric conversion modules, together be input in signal-processing board, carry out signal amplification filtering etc., enter again data acquisition module and carry out the A/D conversion, finally be input in computer processing module.Signal-processing board initiatively reads the value of temperature correction with temperature sensor on module, is input in computer processing module after changing into Temperature numerical.
Obtain
The Stokes data at place are expressed as
, the anti-Stokes data at L place are expressed as
.
The temperature at place
.Strength ratio by both obtains each disconnected temperature value of optical fiber, does not consider that the decay of Stokes that fiber transmission attenuation causes and anti-Stokes light amplitude is poor, and the temperature computation publicity is:
In formula, k is Boltzmann Changshu, and h is Planck Changshu,
Raman Phonon frequency 13.2THz for the optical fiber molecule.
,
Be respectively anti-Stokes and Stokes Raman scattering frequency, because the system filter module filtered scope of each DTS main frame is inconsistent, this numerical value of every DTS main frame is all not identical.According to formula (2), can calculate DTS main frame to be calibrated
Numerical value, substitution formula (1) gets final product.
Claims (6)
- One kind can be on-the-spot the distributed optical fiber temperature sensing system of automatic temperature-adjusting calibration, it is characterized in that: the temperature correction use module (10) that comprises the DTS main frame and is connected with the DTS main frame.
- 2. distributed optical fiber temperature sensing system according to claim 1 is characterized in that: described temperature correction is connected with the DTS main frame through the connecting line of 2 cores or 3 cores with module (10).
- 3. distributed optical fiber temperature sensing system according to claim 2, it is characterized in that: described temperature correction comprises the cylindrical cavity (12) of uncovered with module (10), cylindrical cavity (12) inner bottom part is embedded with temperature sensor (11).
- 4. distributed optical fiber temperature sensing system according to claim 3, it is characterized in that: described temperature sensor (11) is digital temperature sensor.
- 5. the described distributed optical fiber temperature sensing system of according to claim 1-4 arbitrary claim, it is characterized in that: described DTS main frame comprises shell (9), in shell (9), be provided with laser instrument (1), the input end of laser instrument (1) is connected with the output terminal of laser instrument driver module (2), the output terminal of laser instrument (1) is connected with the input end of light splitting filtration module (3), the output terminal of light splitting filtration module (3) is connected with the input end of optical fiber (4) and two photoelectric conversion modules (5), the output terminal of photoelectric conversion module (5) is connected with the input end of signal processing module (6), an output terminal of signal processing module (6) is connected with the input end of data acquisition unit (7), the output terminal of data acquisition unit (7) is connected with computer processing module (8), signal processing module (6) has an output terminal to be connected with the input end of laser instrument driver module (2), signal processing module (6) has an input end and temperature correction with unidirectional connection of module (10), signal processing module (6) also is provided with a port, with two-way connection of computer processing unit (8).
- 6. distributed optical fiber temperature sensing system according to claim 5, it is characterized in that: described computer processing unit is provided with the DTS temperature measurement module in (8).
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| CN2013203901617U CN203298900U (en) | 2013-07-01 | 2013-07-01 | Distributed optical fiber temperature sensor system capable of correcting temperature automatically on site |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106482869A (en) * | 2016-11-17 | 2017-03-08 | 中国电子科技集团公司第四十研究所 | A kind of miniaturization distributed optical fiber temperature measurement caliberating device and scaling method |
| CN108458814A (en) * | 2018-07-09 | 2018-08-28 | 太原理工大学 | Self calibration detection device towards fiber Raman temperature-sensing system and temperature demodulation method |
| WO2021036611A1 (en) * | 2019-08-30 | 2021-03-04 | 南方电网科学研究院有限责任公司 | Online temperature monitoring system for deep well-type grounding electrode |
-
2013
- 2013-07-01 CN CN2013203901617U patent/CN203298900U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106482869A (en) * | 2016-11-17 | 2017-03-08 | 中国电子科技集团公司第四十研究所 | A kind of miniaturization distributed optical fiber temperature measurement caliberating device and scaling method |
| CN108458814A (en) * | 2018-07-09 | 2018-08-28 | 太原理工大学 | Self calibration detection device towards fiber Raman temperature-sensing system and temperature demodulation method |
| US11927491B2 (en) | 2018-07-09 | 2024-03-12 | Taiyuan University Of Technology | Self-calibration detection device and temperature demodulation method oriented to fiber Raman temperature sensing system |
| WO2021036611A1 (en) * | 2019-08-30 | 2021-03-04 | 南方电网科学研究院有限责任公司 | Online temperature monitoring system for deep well-type grounding electrode |
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