CN204286637U - Portable distributed fibre optic temperature sensor - Google Patents

Portable distributed fibre optic temperature sensor Download PDF

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Publication number
CN204286637U
CN204286637U CN201420855778.6U CN201420855778U CN204286637U CN 204286637 U CN204286637 U CN 204286637U CN 201420855778 U CN201420855778 U CN 201420855778U CN 204286637 U CN204286637 U CN 204286637U
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CN
China
Prior art keywords
output terminal
portable
wavelength division
division multiplexer
narrow
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
CN201420855778.6U
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Chinese (zh)
Inventor
张文平
赵世燃
冯军
杜炎
祝海钟
曹滨
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
HANGZHOU OE PHOTOELECTRIC TECHNOLOGY Co Ltd
Original Assignee
HANGZHOU OE PHOTOELECTRIC TECHNOLOGY Co Ltd
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Filing date
Publication date
Application filed by HANGZHOU OE PHOTOELECTRIC TECHNOLOGY Co Ltd filed Critical HANGZHOU OE PHOTOELECTRIC TECHNOLOGY Co Ltd
Priority to CN201420855778.6U priority Critical patent/CN204286637U/en
Application granted granted Critical
Publication of CN204286637U publication Critical patent/CN204286637U/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

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Abstract

The utility model discloses a kind of portable distributed fibre optic temperature sensor, comprise a portable instrument casing (11), narrow-pulse laser pipe and drive plate (1) is provided with in portable instrument casing (11), the output terminal of narrow-pulse laser pipe and drive plate (1) is connected with the input end of wavelength division multiplexer (2), an output terminal of wavelength division multiplexer (2) is connected on the fiber optic adapter (3) on portable instrument casing (11) shell after calibration optical fiber (8), fiber optic adapter (3) is connected with external sense optical fiber (7) again, another output terminal of wavelength division multiplexer (2) is connected with the input end of photoelectric conversion module (4), the output terminal of photoelectric conversion module (4) is connected with the input end of signal processing module (5), the output terminal of signal processing module (5) is connected with arm processor module (6).

Description

Portable distributed fibre optic temperature sensor
Technical field
The utility model relates to a kind of distributed optical fiber temperature sensor, particularly a kind of portable distributed optical fiber temperature sensor based on Raman scattering principle.
Background technology
Distributed optical fiber temperature sensing system is made up of main frame and optical fiber two parts, and wherein the effect of main frame is signal transacting and display, and optical fiber is sensor.Main frame emission pulse laser is in optical fiber, Raman scattering can be there is time pulsed light transmits in a fiber, send stokes light and anti-Stokes light, wherein anti-Stokes light is to responsive to temperature, temperature is higher, intensity is stronger, utilizes the Strength Changes of anti-Stokes to demodulate temperature variation.Distributed optical fiber temperature sensing system has the features such as electromagnetism interference, intrinsic safety, long-life, is mainly used in on-line monitoring field at present, is mainly used in electric system, cable tunnel detection application, petroleum conveying pipeline or tank leak monitoring etc.
But do not need to carry out on-line monitoring to temperature for a long time in some specific occasions, take measures as needed between construction of concrte dams to carry out temperature control, reduce thermograde in dam body, crackle preventing, guarantee dam safety, in time with the key that the temperature field information obtaining dam concrete inside configuration is exactly massive concrete construction control.Without the need to monitoring in real time temperature after construction terminates.In detailed programs, only need buying sensor fibre to be laid on the part needing to detect temperature, rent distributed fiber temperature sensing main frame to on-the-spot test.The general built-in industrial computer of traditional distributed optical fiber sensing main frame, adopt Stokes and the demodulation of anti-Stokes two-way, optical device is many, and therefore volume is comparatively large, and needs configuration display, keyboard, mouse etc. to use.This just proposes the demands such as miniaturization, portable, economical and practical, energy consumption is low to distributed fiber temperature sensing main frame.
Utility model content
The purpose of this utility model is, provides a kind of portable distributed fibre optic temperature sensor.Components and parts of the present utility model are simplified, volume is little, be easy to carry about with one, and can reduce thermometric cost.
The technical solution of the utility model: portable distributed fibre optic temperature sensor, be characterized in: comprise a portable instrument casing, narrow-pulse laser pipe and drive plate is provided with in portable instrument casing, the output terminal of narrow-pulse laser pipe and drive plate is connected with the input end of wavelength division multiplexer, an output terminal of wavelength division multiplexer is connected on the fiber optic adapter on portable instrument cabinet shell after calibration optical fiber, fiber optic adapter again with external sense Fiber connection, another output terminal of wavelength division multiplexer is connected with the input end of photoelectric conversion module, the output terminal of photoelectric conversion module is connected with the input end of signal processing module, the output terminal of signal processing module and arm processor model calling.
In aforesaid portable distributed fibre optic temperature sensor, the narrow-pulse laser tube wave of described narrow-pulse laser pipe and drive plate is long is 1550nm, wavelength division multiplexer working range 1400nm ~ 1600nm, and filter range is 1450nm ± 10nm.
In aforesaid portable distributed fibre optic temperature sensor, described portable instrument casing is provided with: LCD display, is used for showing human-computer interaction interface; Button, is used for carrying out control operation; And pilot lamp, be used to refer to working state of system.
Compared with prior art, the utility model arm processor module replaces traditional industrial computer part, and only comprises a road photoelectric detection module, anti-Stokes single-channel mode can be adopted to demodulate temperature data, greatly conserve space and cost.Structure of the present utility model can the complete independently data acquisition without industrial computer controls, temperature computation, analysis display function, cost is low, and volume is little, lightweight, low in energy consumption, more convenient operation and carrying.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model;
Fig. 2 is appearance schematic diagram of the present utility model.
Embodiment
Below in conjunction with drawings and Examples, the utility model is further described, but not as the foundation limited the utility model.
Embodiment.A kind of portable distributed fibre optic temperature sensor, as shown in Figure 1: comprise a portable instrument casing 11, narrow-pulse laser pipe and drive plate 1 is provided with in portable instrument casing 11, the output terminal of narrow-pulse laser pipe and drive plate 1 is connected with the input end of wavelength division multiplexer 2, an output terminal of wavelength division multiplexer 2 is connected on the fiber optic adapter 3 on portable instrument casing 11 shell after calibration optical fiber 8, fiber optic adapter 3 is connected with external sense optical fiber 7 again, another output terminal of wavelength division multiplexer 2 is connected with the input end of photoelectric conversion module 4, the output terminal of photoelectric conversion module 4 is connected with the input end of signal processing module 5, the output terminal of signal processing module 5 is connected with arm processor module 6.The length of described calibration optical fiber 8 is 50 meters.The narrow-pulse laser tube wave of described narrow-pulse laser pipe and drive plate 1 is long is 1550nm, wavelength division multiplexer working range 1400nm ~ 1600nm, and filter range is 1450nm ± 10nm.Described portable instrument casing 11 is provided with LCD display 12, button 13 and pilot lamp 14, as shown in Figure 2.
Power supply mode of the present utility model can be accumulator, also can be alternating current.Pilot lamp quantity of the present utility model is 4, respectively the normal portable lamp of correspondence system, laser works lamp, alarm lamp and trouble light.The fiber type of contained optical device of the present utility model can be all single mode, can be also all multimode, requires to be consistent with external sensor fibre.
The principle of work of portable distributed fibre optic temperature sensor of the present utility model is as follows:
Raman scattering effect can occur time pulsed light transmits in a fiber, send stokes light and anti-Stokes light, wherein anti-Stokes light is to responsive to temperature simultaneously, and temperature is higher, and intensity is stronger.In optical fiber, any point place anti-Stokes Raman Back Scattering light intensity is:
(1)
(2)
for the frequency of anti Stokes scattering light, for the output intensity of laser instrument, for the light intensity of anti Stokes scattering light. be laser instrument in a fiber forward transmission attenuation coefficient, be the attenuation coefficient that anti Stokes scattering light transmits in a fiber dorsad, h is Bo Langke (Planck) constant, be the Phonon frequency of an optical fiber molecule, for 13.2THz, k are Boltzmann constants, T is Kai Erwen (Kelvin) absolute temperature.
The calibration optical fiber place anti-Stokes Raman Back Scattering light intensity chosen is:
(3)
(4)
The utility model, with the demodulation of anti-Stokes light single channel, the anti-Stokes light data namely returned and the anti-Stokes light data of calibration place are divided by, and the actual temperature of calibration place is input in system, can calculate the temperature value of each point of residue.
(5)
A branch of pulsed light launched by narrow-pulse laser pipe, external sense optical fiber is entered into by wavelength division multiplexer, Raman Back Scattering is there is in transmitting procedure, scattered light leaches anti-Stokes light after wavelength division multiplexer filtering, transfer simulating signal to by photoelectric conversion module, signal processing module process is calculated to be temperature data, is finally transferred to arm processor, storage temperature data in storage card or USB flash disk, or are transferred to common computer by the mode such as Ethernet, bluetooth.
Transplant built-in Linux operating system in arm processor, devise liquid crystal display driving, touch-screen driving, USB driving, Ethernet driving etc.
The using method of the present embodiment is: start, and waiting system, after starting, LCD display shows data acquisition interface, interface is integrated with button control, the button space in LCD display can be clicked with a felt pen, call corresponding driver, realize corresponding function.Also operation can be realized by the button on panel.After click starts collection, laser tube is luminous, produce Raman scattering, the anti-Stokes light returned transfers simulating signal to by photoelectric conversion module, signal processing module process is calculated to be temperature data, finally be transferred to arm processor, storage temperature data in storage card or USB flash disk, or are transferred to common computer by the mode such as Ethernet, bluetooth.

Claims (3)

1. portable distributed fibre optic temperature sensor, it is characterized in that: comprise a portable instrument casing (11), narrow-pulse laser pipe and drive plate (1) is provided with in portable instrument casing (11), the output terminal of narrow-pulse laser pipe and drive plate (1) is connected with the input end of wavelength division multiplexer (2), an output terminal of wavelength division multiplexer (2) is connected on the fiber optic adapter (3) on portable instrument casing (11) shell after calibration optical fiber (8), fiber optic adapter (3) is connected with external sense optical fiber (7) again, another output terminal of wavelength division multiplexer (2) is connected with the input end of photoelectric conversion module (4), the output terminal of photoelectric conversion module (4) is connected with the input end of signal processing module (5), the output terminal of signal processing module (5) is connected with arm processor module (6).
2. portable distributed fibre optic temperature sensor according to claim 1, it is characterized in that: the narrow-pulse laser tube wave of described narrow-pulse laser pipe and drive plate (1) is long is 1550nm, wavelength division multiplexer working range 1400nm ~ 1600nm, filter range is 1450nm ± 10nm.
3. portable distributed fibre optic temperature sensor according to claim 1, is characterized in that: described portable instrument casing (11) is provided with LCD display (12), button (13) and pilot lamp (14).
CN201420855778.6U 2014-12-30 2014-12-30 Portable distributed fibre optic temperature sensor Expired - Fee Related CN204286637U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201420855778.6U CN204286637U (en) 2014-12-30 2014-12-30 Portable distributed fibre optic temperature sensor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201420855778.6U CN204286637U (en) 2014-12-30 2014-12-30 Portable distributed fibre optic temperature sensor

Publications (1)

Publication Number Publication Date
CN204286637U true CN204286637U (en) 2015-04-22

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Country Status (1)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104483040A (en) * 2014-12-30 2015-04-01 杭州欧忆光电科技有限公司 Portable distribution optical fiber temperature sensor
CN107576419A (en) * 2017-09-13 2018-01-12 武汉中航传感技术有限责任公司 A kind of optical fiber temperature-measurement device and method
CN110146192A (en) * 2019-06-21 2019-08-20 国网河北省电力有限公司电力科学研究院 A kind of distributed optical fiber temperature measurement compensation system and its compensation method

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104483040A (en) * 2014-12-30 2015-04-01 杭州欧忆光电科技有限公司 Portable distribution optical fiber temperature sensor
CN107576419A (en) * 2017-09-13 2018-01-12 武汉中航传感技术有限责任公司 A kind of optical fiber temperature-measurement device and method
CN110146192A (en) * 2019-06-21 2019-08-20 国网河北省电力有限公司电力科学研究院 A kind of distributed optical fiber temperature measurement compensation system and its compensation method

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CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20150422

Termination date: 20151230

EXPY Termination of patent right or utility model