CN101995307A - Distributed optical fiber temperature sensing device with point-mode accurate temperature measurement - Google Patents
Distributed optical fiber temperature sensing device with point-mode accurate temperature measurement Download PDFInfo
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- CN101995307A CN101995307A CN201010500965.9A CN201010500965A CN101995307A CN 101995307 A CN101995307 A CN 101995307A CN 201010500965 A CN201010500965 A CN 201010500965A CN 101995307 A CN101995307 A CN 101995307A
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Abstract
The invention relates to a distributed optical fiber temperature sensing device with point-mode accurate temperature measurement, comprising a main machine and a sensing optical cable. The distributed optical fiber temperature sensing device is characterized by comprising at least one sensing unit, and each sensing unit comprises a sensing optical fiber. The invention has the advantages of high temperature measurement accuracy of a short-heated area, realization of distributed temperature monitoring, fast temperature response, good compressive and tensile resistant property, and the like.
Description
Technical field
The present invention relates to temperature sensing, especially a kind of distributed optical fiber temperature sensing device.
Background technology
Distributed optical fiber temperature sensing system is a kind of sensor-based system that real-time measurement space temperature field distributes that is used for.It is carrier based on the principle of advanced person's optical time domain reflection technology and the Raman scattering temperature effect dorsad of optical fiber with optical fiber, is combined by main frame, sensing optic cable and other external unit (as power backup module, mixed-media network modules mixed-media etc.).The distributing optical fiber sensing technology has anti-electromagnetic interference (EMI), big characteristics such as signal transmission bandwidth.
Compare with the conventional port temperature sensor, the sensing optic cable of distributed optical fiber temperature sensing system is a transmission medium, it also is sensor, it can continuous coverage sensing optic cable laying area along the line temperature, measuring distance is in several kilometer range, and spatial positioning accuracy reaches the order of magnitude of rice, can carry out uninterrupted automatic measurement, be specially adapted to the application scenario of multimetering on a large scale, be widely used in fields such as traffic, electric power, petrochemical industry.
Though distributed optical fiber temperature sensing system can be realized the spatial resolution of meter order of magnitude, but if the heat affected zone of monitored area is shorter, then the temperature survey to the monitored area that obtains of system is the average effect of heat affected zone and surrounding space temperature, this can cause the monitored area thermometric inaccurate, simultaneously to the location of thermal source also out of true.
As lay along the line at sensing optic cable on a measured zone is arranged, the temperature around it is 20 ℃, and one 50 ℃ thermal source is arranged in its vicinity, if utilize distributed optical fiber temperature sensing system to measure this regional temperature, obtaining this regional temperature may be 25 ℃.At this moment, variation has taken place in the temperature that system can detect in this measured zone, but temperature that records and actual temperature differ bigger, make that the temperature of actual measurement is inaccurate.Simultaneously, 25 ℃ of reflections of result of measurement be the temperature conditions of whole measured zone, can't accomplish the accurate location of thermal source.
As can be seen, distributed optical fiber temperature sensing system can only detect the unusual condition of temperature in the monitored area, but can not truly reflect the intensity of anomaly of this regional temperature.Simultaneously, if will carry out the emphasis monitoring to a certain zone, what obtain but is the average effect of this regional temperature, can not reflect the truth of this regional temperature.
Therefore, less for heat affected zone, and the occasion of the accurate thermometric of needs, there is bigger restriction in the application of existing distributed fiber temperature sensing system.
In addition, in actual application, distributed optical fiber temperature sensing system requires to respond ambient temperature as early as possible, so that in time find the condition of a fire or temperature anomaly situation.And the external sensing optic cable of existing distributed optical fiber temperature sensing system for satisfying certain tension and compressive property, has been made armouring or thick lining to handle, and is subjected to the restriction of the heat conductivility of optical cable own, and the sensing optic cable response of temperature anomaly to external world has certain hysteresis.
Summary of the invention
In order to solve above-mentioned deficiency of the prior art, the invention provides and a kind ofly have the accurate temp sensing function of point type, have a quick response optical fiber temperature sensing device of continuous distribution formula monitoring function again.
For achieving the above object, the present invention adopts following technical scheme:
A kind of distributed optical fiber temperature sensing device with the accurate thermometric of point type comprises main frame and sensing optic cable, is characterized in: described sensing device also comprises at least one sensing unit, and each sensing unit comprises sensor fibre.
As preferably, the length of described sensor fibre is greater than the spatial resolution of described device.
As preferably, described sensor fibre is arranged in the container or is fixed on the support.
Further, described internal tank is filled heat-conducting medium.
As preferably, described sensor fibre is that naked fibre or tight cover are fine or the pine cover is fine.
As preferably, adopt the mode of welding or active joint to be connected between described sensing optic cable and the sensing unit.
Further, described sensing optic cable is connected with sensing unit by adapter.
As preferably, described sensing unit contact thermal source.
The present invention compared with prior art has following beneficial effect:
1, realization is to the accurate thermometric of short heat affected zone.
Owing to comprise the sensor fibre of a segment length greater than system space resolution in the sensing unit, sensing unit is experienced after the ambient temperature response the sensor fibre of heat transferred inside, can realize lacking the accurate temperature measurement of heat affected zone.
2, realize the distributed temperature monitoring.
Sensing optic cable outside the sensing unit itself also is a sensor, can realize distributed temperature monitoring, and leak source not improves the reliability of sensing device.
3, realization is to the quick response of heat affected zone.
The inner good heat-conducting medium of heat conductivility of filling of sensing unit makes sensor fibre faster response ambient temperature change, and improves the response time.
4, stretching resistance and shock resistance are good.
Owing to sensor fibre is coiled in can inside, has alleviated impulse force or pressure that sensor fibre bears; Simultaneously, the pulling force that the sensor fibre of sensing unit outside bears can not act directly on the sensor fibre, makes not easy fracture of sensor fibre, can guarantee the continuous coverage to the monitored area temperature.
Description of drawings
Fig. 1 is a structural representation of the present invention;
Fig. 2 is the structural representation of sensing unit among the embodiment 1;
Fig. 3 is the structural representation of sensing unit among the embodiment 2;
Fig. 4 is the structural representation of sensing unit among the embodiment 3;
Fig. 5 is the structural representation of sensing unit among the embodiment 4.
Embodiment
Embodiment 1:
See also Fig. 1, Fig. 2, a kind of distributed optical fiber temperature sensing device with the accurate thermometric of point type comprises main frame, sensing optic cable 10 and at least two sensing units.
Described sensing unit comprises can 31 and sensor fibre 41, and the length of sensor fibre 41 adopts the mode of coiling to be installed in the can 31 greater than the spatial resolution of sensing device institute nominal.Described sensing unit is arranged on the emphasis monitoring point, in high-tension switch cabinet, uses sensing optic cable to connect described sensing unit, adopts the welding mode to be connected between described sensing optic cable 10 and the sensing unit.
Can 31 adopts the good metal material of thermal conductivity to make, and as stainless steel, aluminium, titanium alloy etc., so long as this metal has certain rigid, and can make can have certain compressive property to get final product.Present embodiment is selected stainless steel for use.
Because can 31 adopts the good stainless steel of thermal conductivity to make, and external temperature information can be reached fast inner sensor fibre 41, makes the timely response external variation of temperature of system, has shortened the temperature-responsive time of fiber temperature sensing system.Simultaneously when extraneous impulse force or pressure act on sensing unit,, can in time protect inner sensor fibre 41, avoid damaging because stainless steel material has certain rigid.
The system space resolution of GB specified distribution formula fiber temperature sensing system is less than and equals 3 meters, then can realize the accurate thermometric of point type, and the length of the sensor fibre of sensing unit inside is greater than 3 meters.The length of present embodiment sensor fibre is at least 5 meters.
Owing to comprise the sensor fibre of a segment length in the sensing unit greater than system space resolution, sensing unit is experienced after the ambient temperature response sensor fibre with heat transferred inside, owing to be heated fiber lengths greater than spatial resolution, can realize accurate temperature measurement to short heat affected zone.
Sensing optic cable 10 outside the sensing unit itself also is a sensor, can realize distributed temperature monitoring, and leak source not improves the reliability of sensing device.
Can also make sensing unit paste thermal source, thus the position of alignment sensor.
Embodiment 2:
A kind of distributed optical fiber temperature sensing device with the accurate thermometric of point type, as different from Example 1:
See also Fig. 3, fill heat-conducting medium 51 in the inside of can 31.Heat-conducting medium can get final product for silicone grease or silicone oil etc. can pass to hot material.Present embodiment is selected silicone grease for use.
The ambient temperature of can 31 perception is passed to the sensor fibre 41 that is coiled in can 31 inside fast by silicone grease, further improves the thermal response efficient of sensor fibre 41.
Embodiment 3:
A kind of distributed optical fiber temperature sensing device with the accurate thermometric of point type, as different from Example 1:
1, see also Fig. 4, sensor fibre 42 adopts the mode of coiling to be installed in the can 32; The two ends of sensor fibre 42 are equipped with fibre-optical splice 8 and fibre-optical splice 9; Adapter 6 and adapter 7 are installed on the outer wall of can 32; Sensor fibre 42 is separately fixed on adapter 6 and the adapter 7 by fibre-optical splice 8 and fibre-optical splice 9.The two ends of the sensing optic cable 10 on sensing unit both sides also are respectively arranged with fibre-optical splice, and are connected with adapter 7 with adapter 6.
The two ends of sensor fibre 42 and sensing optic cable 10 are respectively arranged with fibre-optical splice, and be connected by adapter, this employing active joint ways of connecting can reduce on-the-spot welding number of times, and it is more convenient, quick to construct, and being easy to realize the replacing of sensing unit, later maintenance is simple; Simultaneously, when the external world has pulling force to act on the sensing optic cable 10, the fibre-optical splice of sensing optic cable 10 1 ends bears tension force, if pulling force is excessive, cause the sensing optic cable fracture, breaking portion can be cut off, connect fibre-optical splice and continue to use, and can not have influence on sensor fibre 42 in the sensing unit can, can guarantee continuous coverage to the monitored area temperature.
2, heat-conducting medium 52 is filled in the inside of can 32, as heat-conducting cream.
3, described can 32 adopts the good titanium alloy of heat conductivility to make.
Because can 32 adopts the good titanium alloy of thermal conductivity to make, and external temperature information can be reached fast inner sensor fibre 42, makes the timely response external variation of temperature of system, has shortened the temperature-responsive time of fiber temperature sensing system.Simultaneously when extraneous impulse force or pressure act on sensing unit,, can in time protect inner sensor fibre 42, avoid damaging because titanium alloy material has certain rigid.
4, the length of sensor fibre 42 greater than the spatial resolution of system, length is elected 4 meters as.
Owing to comprise the sensor fibre of a segment length in the sensing unit greater than system space resolution, sensing unit is experienced after the ambient temperature response sensor fibre with heat transferred inside, owing to be heated fiber lengths greater than spatial resolution, can realize accurate temperature measurement to short heat affected zone.
Sensing optic cable 10 outside the sensing unit itself also is a sensor, can realize distributed temperature monitoring, and leak source not improves the reliability of sensing device.
Embodiment 4:
As shown in Figure 5, a kind of distributed optical fiber temperature sensing device with the accurate thermometric of point type, as different from Example 3:
1, the sensor fibre of each sensing unit is fixed on the support 62, makes sensor fibre directly contact with air, and directly the temperature in the perception external world has improved the precision of measuring, and has also reduced Measuring Time.
2, adopt support, also just do not re-used heat-conducting mediums such as heat-conducting cream.
Above-mentioned embodiment should not be construed as limiting the scope of the invention.Key of the present invention is: include the sensing unit of length greater than the sensor fibre of system space resolution by inside is set, realize the accurate thermometric of the point type of emphasis monitored area.Under the situation that does not break away from spirit of the present invention, any type of change that the present invention is made all should fall within protection scope of the present invention.
Claims (8)
1. the distributed optical fiber temperature sensing device with the accurate thermometric of point type comprises main frame and sensing optic cable, it is characterized in that: described sensing device also comprises at least one sensing unit, and each sensing unit comprises sensor fibre.
2. temperature sensing device according to claim 1 is characterized in that: the length of described sensor fibre is greater than the spatial resolution of described device.
3. temperature sensing device according to claim 1 is characterized in that: described sensor fibre is arranged in the container or is fixed on the support.
4. temperature sensing device according to claim 3 is characterized in that: described internal tank is filled heat-conducting medium.
5. temperature sensing device according to claim 1 is characterized in that: described sensor fibre is that naked fibre or tight cover are fine or the pine cover is fine.
6. temperature sensing device according to claim 1 is characterized in that: adopt the mode of welding or active joint to be connected between described sensing optic cable and the sensing unit.
7. temperature sensing device according to claim 6 is characterized in that: described sensing optic cable is connected with sensing unit by adapter.
8. temperature sensing device according to claim 1 is characterized in that: described sensing unit contact thermal source.
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| CN201010500965.9A CN101995307A (en) | 2010-07-03 | 2010-09-25 | Distributed optical fiber temperature sensing device with point-mode accurate temperature measurement |
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| CN201020254071 | 2010-07-03 | ||
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| CN201010500965.9A CN101995307A (en) | 2010-07-03 | 2010-09-25 | Distributed optical fiber temperature sensing device with point-mode accurate temperature measurement |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108426652A (en) * | 2018-06-22 | 2018-08-21 | 上海达琪智能科技有限公司 | Point type temperature sensing device based on fiber raman scattering and system |
| 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 |
| CN113865743A (en) * | 2021-10-13 | 2021-12-31 | 广东感芯激光科技有限公司 | Optical fiber distributed battery multipoint temperature measurement system and application |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101109663A (en) * | 2007-08-09 | 2008-01-23 | 中国科学院长春光学精密机械与物理研究所 | Optical fiber temperature sensor based on bending loss |
| CN101566508A (en) * | 2009-06-01 | 2009-10-28 | 南京大学 | Distributed optical fiber temperature sensor with high spatial resolution |
| CN201378084Y (en) * | 2008-12-02 | 2010-01-06 | 广州市设计院 | Enclosed bus slot joint or plug temperature measuring device |
-
2010
- 2010-09-25 CN CN201010500965.9A patent/CN101995307A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101109663A (en) * | 2007-08-09 | 2008-01-23 | 中国科学院长春光学精密机械与物理研究所 | Optical fiber temperature sensor based on bending loss |
| CN201378084Y (en) * | 2008-12-02 | 2010-01-06 | 广州市设计院 | Enclosed bus slot joint or plug temperature measuring device |
| CN101566508A (en) * | 2009-06-01 | 2009-10-28 | 南京大学 | Distributed optical fiber temperature sensor with high spatial resolution |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108426652A (en) * | 2018-06-22 | 2018-08-21 | 上海达琪智能科技有限公司 | Point type temperature sensing device based on fiber raman scattering and system |
| 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 |
| CN113865743A (en) * | 2021-10-13 | 2021-12-31 | 广东感芯激光科技有限公司 | Optical fiber distributed battery multipoint temperature measurement system and application |
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Free format text: FORMER OWNER: WUXI FPI SENSOR NETWORK CO., LTD. Effective date: 20120313 |
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Effective date of registration: 20120313 Address after: Hangzhou City, Zhejiang province Binjiang District 310052 shore road 760 Applicant after: Focused Photonics (Hangzhou) Inc. Address before: Hangzhou City, Zhejiang province Binjiang District 310052 shore road 760 Applicant before: Focused Photonics (Hangzhou) Inc. Co-applicant before: Wuxi Juguang Shengshi Sensor Network Co., Ltd. |
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Application publication date: 20110330 |