CN101344442B - Automatic calibration type distributed optical fiber temperature measurement sensing equipment and its use method - Google Patents
Automatic calibration type distributed optical fiber temperature measurement sensing equipment and its use method Download PDFInfo
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- CN101344442B CN101344442B CN2008100421984A CN200810042198A CN101344442B CN 101344442 B CN101344442 B CN 101344442B CN 2008100421984 A CN2008100421984 A CN 2008100421984A CN 200810042198 A CN200810042198 A CN 200810042198A CN 101344442 B CN101344442 B CN 101344442B
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Abstract
The invention discloses a distributed optical fiber temperature measuring and sensing device with automatic calibration and a use method thereof, and is characterized in that an output end of an optical maser is connected with an input end of a branching unit, an output end of the branching unit is respectively connected with an input end of a coupler and an optical signal detector, an output endof the optical signal detector is connected with an input end of an adjustor, an output end of the adjustor is connected with an input end of a signal amplifier, an output end of an isochronous controller is connected with an input end of the optical signal detector and a data acquisition unit, an input end of the isochronous controller is connected with an output end of a data processor, and an input end of the data processor is connected with an output end of the data acquisition unit. Compared with traditional optical fiber temperature measuring and sensing devices, the distributed opticalfiber temperature measuring and sensing device with automatic calibration gain has the following advantages: 1. the device is not required to be returned to factories for measuring and debugging, thus saving resources and funds; 2. the device can maintain continuously precise measurement for a long time; 3. the time and number of the project operation and cease are greatly reduced.
Description
Technical field:
The present invention relates to the technical field of distributed fiber temperature sensing, a kind of specifically automatic calibration type distributed optical fiber temperature measurement sensing equipment and method of application thereof, particularly its mechanical connecting structure.
Background technology:
Optical fibre temperature measurement sensing system is mainly used in industries such as traffic, building, electric power, colliery, petrochemical industry, and its effect is that the real time temperature monitoring is carried out in these important places.It ensures that to normally moving with guaranteeing industrial system equipment the safety of life and property plays an important role.
Existing optical fibre temperature measurement sensing system is made up of laser driver, laser instrument, isochronous controller, coupling mechanism, calibration cell, reference optical fiber, light filter, photoelectric probe, signal amplifier, data acquisition unit and computing machine.Its principle of work is: laser instrument is continuously launched laser in detecting optical cable; Back scattering can take place in the transmission course in laser in optical cable; Because casual (Raman) spectrum of loudspeaker is responsive to temperature, through coupling mechanism and optical splitter casual (Raman) spectral separation of the loudspeaker in the rear orientation light is come out, pass through the laggard line data collection of opto-electronic conversion and signal processing and amplifying again; And then the data that collect are sent to the data processor computing machine handle calculating, finally draw temperature data.
In distributed optical fiber temperature sensing system, the laser instrument light intensity is a very important parameters, but along with the laser instrument growth of service time, the light intensity of laser can weaken gradually, and then can influence the accuracy of temperature measuring equipment; Existing way is regularly equipment to be returned producer to detect, calibrate.So not only needing very big manpower and materials, also can be to interrupt temperature detection.
In sum, still need the structure of existing fiber temperature measurement sensing equipment be further improved.
Summary of the invention:
The object of the present invention is to provide a kind of automatic calibration type distributed optical fiber temperature measurement sensing equipment and method of application thereof; It improves the device inner structure, has effectively improved the problem that laser intensity weakens and has overcome the shortcoming and defect that the existing fiber temperature measurement sensing system exists.
To achieve these goals; Technical scheme of the present invention is: a kind of automatic calibration type distributed optical fiber temperature measurement sensing equipment, and it comprises crust of the device, is provided with laser instrument in the crust of the device; The input end of laser instrument is connected with the output terminal of laser driver; The input end of laser driver is connected with the output terminal of isochronous controller, and the output terminal of coupling mechanism is connected with the input end of light filter, and the output terminal of light filter is connected with the input end of photodetector; The output terminal of photodetector is connected with the input end of signal amplifier; The output terminal of signal amplifier is connected with the input end of data acquisition unit, and the coupling apparatus place is provided with optical fiber interface, it is characterized in that: the output terminal of said laser instrument is connected with the input end of shunt; The output terminal of shunt is connected with the input end of coupling mechanism, optical signal detector respectively; The output terminal of optical signal detector is connected with the input end of regulator, and the output terminal of regulator is connected with another input end of signal amplifier, and another output terminal of isochronous controller is connected with another input end of optical signal detector, another input end of data acquisition unit respectively; The input end of isochronous controller is connected with the output terminal of data processor, and the input end of data processor is connected with the output terminal of data acquisition unit.
A kind of automatic calibration type distributed optical fiber temperature measurement sensing equipment method of application; It is characterized in that: when computing machine sends the beginning measuring command when giving data processor, data processor drives isochronous controller at once and sends synchronizing pulse requirement laser driver and optical signal detector and data acquisition unit and start working simultaneously; Laser driver just begins drive laser work after receiving the synchronizing pulse that isochronous controller sends, and in optical fiber, continuously sends laser signal; Shunt can go out one with separation by laser and be sent to optical signal detector, is used for checking; Another part Laser Transmission is carried out temperature detection to optical fiber; The back can take place and overflow (Raman) scattering to loudspeaker in laser when in optical fiber, transmitting, the back is overflow laser signal that (Raman) scattering returns to loudspeaker and is coupled device and separates one the tunnel and come out to be sent to light filter; Light filter will overflow separate optical signals with the loudspeaker in the laser signal of sending here and come out, and then sends photoelectric commutator to and convert light signal to electric signal, and then sends electric signal to amplifier and carry out the signal processing and amplifying; The electric signal of crossing through processing and amplifying carries out data acquisition by parallel data acquisition unit; The data that collect through the parallel data acquisition device are sent to the data processor overall treatment, and after the data that data processor processes is crossed are fed to computing machine displays temperature curve, the incident laser that leads to optical signal detector that told by shunt this moment also can reduce; So optical signal detector at regular intervals; Interval is 1 hour-480 hours, will start regulator, regulates No. one time amplifier; Make it by self-defined proportional compensation resonance-amplifier, make parallel data acquisition unit carry out data collection task according to certain circular order in turn.
The invention discloses a kind of automatic calibration type distributed optical fiber temperature measurement sensing equipment and method of application thereof, the distributed optical fiber temperature measurement sensing equipment of the automatic calibration-gain of the present invention is compared the present invention with traditional optical fiber temperature measurement sensing equipment has following advantage and good effect:
1, this device does not need regular return-to-factory to proofread and correct, and saves physical resources and financial resources;
2, device can be kept for a long time and measure accurately continuously;
3, significantly reduce project running shut down time and number of times.
Description of drawings:
Fig. 1 is a structural representation of the present invention
Fig. 2 is a fundamental diagram of the present invention
Embodiment:
With reference to the accompanying drawings, the present invention is further described
The present invention is a kind of automatic calibration type distributed optical fiber temperature measurement sensing equipment and method of application thereof; It comprises crust of the device 14, is provided with laser instrument 3 in the crust of the device 14, and the input end of laser instrument 3 is connected with the output terminal of laser driver 2; The input end of laser driver 2 is connected with the output terminal of isochronous controller 1; The output terminal of coupling mechanism 7 is connected with the input end of light filter 8, and the output terminal of light filter 8 is connected with the input end of photodetector 9, and the output terminal of photodetector 9 is connected with the input end of signal amplifier 10; The output terminal of signal amplifier 10 is connected with the input end of data acquisition unit 11; Coupling mechanism 7 places are provided with optical fiber interface 15, and it is different from prior art and is: the output terminal of said laser instrument 3 is connected with the input end of shunt 4, and the output terminal of shunt 4 is connected with the input end of coupling mechanism 7, optical signal detector 5 respectively; The output terminal of optical signal detector 5 is connected with the input end of regulator 6; The output terminal of regulator 6 is connected with another input end of signal amplifier 10, and another output terminal of isochronous controller 1 is connected with optical signal detector 5 another input ends, data acquisition unit 11 another input ends respectively, and the input end of isochronous controller 1 is connected with the output terminal of data processor 12; The input end of data processor 12 is connected with the output terminal of data acquisition unit 11, said data processor 12 and 13 two-way connections of computing machine.
When the practical implementation of this device, an end of laser instrument is connected with laser driver; The other end of laser instrument is connected with shunt; The laser that shunt sends laser instrument is divided into the sub-laser of two bundles; Wherein one road laser leads to sensor fibre and is used for normally measuring; Backscatter signal in the sensor fibre is coupled device separates one the tunnel and comes out to import into light filter, detector and amplifier, is injected into data acquisition unit; Another road laser is injected in the optical signal detector; Optical signal detector regularly detects incident light; When the incident light decay surpasses self-defined standard; Optical signal detector starts the regulator pair amplifier to be regulated, and has compensated laser instrument indirectly because of the long-term decay of using the light intensity that produces; Computing machine is connected with data processor, and then control isochronous controller and the data that receive data acquisition unit; Three synchronous signal output ends of isochronous controller are connected respectively at laser driver, optical signal detector and data acquisition unit, send synchronizing signal to them and make its synchronous working.
Wherein computing machine is a peripherals, and other equipment are to be enclosed in the casing, and computing machine carries out communication through data communication interface and data processor and reads internal data, and shows on computers.
The invention also discloses a kind of automatic calibration type distributed optical fiber temperature measurement sensing equipment method of application; It is different from prior art and is: when computing machine sends the beginning measuring command when giving data processor, data processor drives isochronous controller at once and sends synchronizing pulse requirement laser driver and optical signal detector and data acquisition unit and start working simultaneously; Laser driver just begins drive laser work after receiving the synchronizing pulse that isochronous controller sends, and in optical fiber, continuously sends laser signal; Shunt can go out one with separation by laser and be sent to optical signal detector, is used for checking; Another part Laser Transmission is carried out temperature detection to optical fiber; The back can take place and overflow (Raman) scattering to loudspeaker in laser when in optical fiber, transmitting, the back is overflow laser signal that (Raman) scattering returns to loudspeaker and is coupled device and separates one the tunnel and come out to be sent to light filter; Light filter will overflow separate optical signals with the loudspeaker in the laser signal of sending here and come out, and then sends photoelectric commutator to and convert light signal to electric signal, and then sends electric signal to amplifier and carry out the signal processing and amplifying; The electric signal of crossing through processing and amplifying carries out data acquisition by parallel data acquisition unit; The data that collect through the parallel data acquisition device are sent to the data processor overall treatment, and after the data that data processor processes is crossed are fed to computing machine displays temperature curve, the incident laser that leads to optical signal detector that told by shunt this moment also can reduce; So optical signal detector at regular intervals; Interval is 1 hour-480 hours, will start regulator, regulates No. one time amplifier; Make it by self-defined proportional compensation resonance-amplifier, make parallel data acquisition unit carry out data collection task in order according to certain circulation in turn.
In the specific implementation, described isochronous controller is to adopt the CDCE913 synchronous clock circuit module of Texas Instruments to realize;
In the specific implementation, described laser driver is the current driver that adopts high speed circuit to make, well drive laser emission laser;
In the specific implementation, described laser instrument is a semiconductor laser, can launch laser according to the drive current of Laser Driven;
In the specific implementation, described shunt adopts; The wideband operation of Shenzhen Science and Technology Ltd. of light Netcom is the standard shunt of 800nm to 1600nm;
In the specific implementation, optical signal detector adopts high sensitivity APD avalanche diode (can adopt the worker InGaAs APD type avalanche photodide of Shenzhen Xing Bo company) to come exploring laser light, with the casual light signal switching electrical signals of loudspeaker;
In the specific implementation, described coupling mechanism is to adopt the y-type optical fiber coupling mechanism, and the laser that it returns back scattering is told one the tunnel and passed to light filter;
In the specific implementation, described light filter adopts lens type worry mating plate (can adopt the MI1000-TiD type of precision photonics company) to consider light, and unnecessary light is filtered, and only stays the casual light of loudspeaker;
In the specific implementation, described photodetector adopts high sensitivity APD avalanche diode to come exploring laser light, with the casual laser signal switching electrical signals of loudspeaker;
In the specific implementation, described amplifier is the big device of the high performance computing of OPA365 type that adopts Texas Instruments;
In the specific implementation, described data acquisition unit is the high speed data acquisition system that adopts Texas Instruments, and travelling speed is 100Mb/s;
In the specific implementation, described data processor is to adopt the high speed FPGA of ALTERA company to realize;
In the specific implementation, described detecting optical cable 16 is to adopt 62.5/125 μ m multimode optical fiber to add the low smoke and zero halogen oversheath, and bandwidth range is>=400MHZ850nm>=1000MHZ1300nm, attenuation range is≤and 3.0dB850nm≤
0.8dB1300nm
In the specific implementation, the used optical fiber of described reference optical fiber and detecting optical cable is identical;
In the specific implementation, described computing machine is a general-purpose industrial level computing machine.
As shown in Figure 2, when computing machine sends the beginning measuring command when giving data processor, data processor drives isochronous controller at once and sends synchronizing pulse requirement laser driver and optical signal detector and data acquisition unit and start working simultaneously; Laser driver just begins drive laser work after receiving the synchronizing pulse that isochronous controller sends, and in optical fiber, continuously sends laser signal; Shunt can go out one with separation by laser and be sent to optical signal detector, is used for checking; Another part Laser Transmission is carried out temperature detection to optical fiber; The back can take place to the loudspeaker diffuse scattering in laser when in optical fiber, transmitting, the laser signal that back scattering is returned is coupled device to be separated one the tunnel and come out to be sent to light filter; Light filter will overflow separate optical signals with the loudspeaker in the laser signal of sending here and come out, and then sends photoelectric commutator to and convert light signal to electric signal, and then sends electric signal to amplifier and carry out the signal processing and amplifying; The electric signal of crossing through processing and amplifying carries out data acquisition by parallel data acquisition unit; The data that collect through the parallel data acquisition device are sent to the data processor overall treatment, after FPGA high-speed data processor data processed is fed to computing machine displays temperature curve.
The incident laser of being told by shunt at that time that leads to the signal verification device also can reduce; The signal verification device (is for example set a week) at regular intervals will start regulator; Regulate No. one time amplifier; Make its Compensation Regulation amplifier by a certain percentage, must regularly send the professional to measure to debug defective and the deficiency of making, make parallel data acquisition unit take turns to carry out data collection task in proper order according to certain to remedy the decay of long-term laser instrument.
Claims (3)
1. automatic calibration type distributed optical fiber temperature measurement sensing equipment; It comprises crust of the device (14); Be provided with laser instrument (3) in the crust of the device (14); The input end of laser instrument (3) is connected with the output terminal of laser driver (2); The input end of laser driver (2) is connected with the output terminal of isochronous controller (1), and the output terminal of coupling mechanism (7) is connected with the input end of light filter (8), and the output terminal of light filter (8) is connected with the input end of photodetector (9); The output terminal of photodetector (9) is connected with the input end of signal amplifier (10); The output terminal of signal amplifier (10) is connected with the input end of data acquisition unit (11), and coupling mechanism (7) locates to be provided with optical fiber interface (15), it is characterized in that: the output terminal of said laser instrument (3) is connected with the input end of shunt (4); The output terminal of shunt (4) is connected with the input end of coupling mechanism (7), optical signal detector (5) respectively; The output terminal of optical signal detector (5) is connected with the input end of regulator (6), and the output terminal of regulator (6) is connected with another input end of signal amplifier (10), and another output terminal of isochronous controller (1) is connected with another input end of optical signal detector (5), another input end of data acquisition unit (11) respectively; The input end of isochronous controller (1) is connected with the output terminal of data processor (12), and the input end of data processor (12) is connected with the output terminal of data acquisition unit (11).
2. a kind of automatic calibration type distributed optical fiber temperature measurement sensing equipment according to claim 1 is characterized in that: said data processor (12) and two-way connection of computing machine (13).
3. automatic calibration type distributed optical fiber temperature measurement sensing equipment method of application; It is characterized in that: when computing machine sends the beginning measuring command when giving data processor, data processor drives isochronous controller at once and sends synchronizing pulse requirement laser driver and optical signal detector and data acquisition unit and start working simultaneously; Laser driver just begins drive laser work after receiving the synchronizing pulse that isochronous controller sends, and in optical fiber, continuously sends laser signal; Shunt can go out one with separation by laser and be sent to optical signal detector, is used for checking; Another part Laser Transmission is carried out temperature detection to optical fiber; The back can take place and overflow (Raman) scattering to loudspeaker in laser when in optical fiber, transmitting, the back is overflow laser signal that (Raman) scattering returns to loudspeaker and is coupled device and separates one the tunnel and come out to be sent to light filter; Light filter will overflow separate optical signals with the loudspeaker in the laser signal of sending here and come out, and then sends photoelectric commutator to and convert light signal to electric signal, and then sends electric signal to amplifier and carry out the signal processing and amplifying; The electric signal of crossing through processing and amplifying carries out data acquisition by parallel data acquisition unit; The data that collect through the parallel data acquisition device are sent to the data processor overall treatment, and after the data that data processor processes is crossed are fed to computing machine displays temperature curve, the incident laser that leads to optical signal detector that told by shunt this moment also can reduce; So optical signal detector at regular intervals; Interval is 1 hour-480 hours, will start regulator, regulates No. one time amplifier; Make it by self-defined proportional compensation resonance-amplifier, make parallel data acquisition unit carry out data collection task in order according to certain circulation in turn.
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| CN106205109A (en) * | 2016-06-24 | 2016-12-07 | 桂林创研科技有限公司 | A kind of for monitoring fibre system at a high speed |
| CN106996838B (en) * | 2017-05-27 | 2019-05-24 | 中国电子科技集团公司第四十一研究所 | A kind of ROTDR performance indicator automatic test and calibration system and method |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1482757A (en) * | 2002-09-12 | 2004-03-17 | 深圳市中兴通讯股份有限公司 | Apparatus and method for adjusting mean slope of multi-pumping Raman amplifier gain spectrum |
| CN1490970A (en) * | 2003-09-19 | 2004-04-21 | 烽火通信科技股份有限公司 | Dynamic gain balancing method and optical transmission system therewith |
| CN2713524Y (en) * | 2004-06-25 | 2005-07-27 | 北京邮电大学 | Temperature controller for Raman optical fiber amplifier |
| CN201247111Y (en) * | 2008-09-01 | 2009-05-27 | 上海华魏自动化设备有限公司 | Automatic calibration type distributed optical fiber temperature measurement sensing equipment |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1482757A (en) * | 2002-09-12 | 2004-03-17 | 深圳市中兴通讯股份有限公司 | Apparatus and method for adjusting mean slope of multi-pumping Raman amplifier gain spectrum |
| CN1490970A (en) * | 2003-09-19 | 2004-04-21 | 烽火通信科技股份有限公司 | Dynamic gain balancing method and optical transmission system therewith |
| CN2713524Y (en) * | 2004-06-25 | 2005-07-27 | 北京邮电大学 | Temperature controller for Raman optical fiber amplifier |
| CN201247111Y (en) * | 2008-09-01 | 2009-05-27 | 上海华魏自动化设备有限公司 | Automatic calibration type distributed optical fiber temperature measurement sensing equipment |
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| JP特开2003-249705A 2003.09.05 |
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