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Distributed optical fiber stress temperature sensing device and sensing method thereof

A distributed optical fiber and sensing device technology, which is applied in thermometers, measuring devices, and the measurement of the change force of optical properties of materials when they are stressed, can solve the problems of low precision, slow processing speed, and affecting detection response speed, etc. problems, to achieve the effect of improving the accuracy of stress measurement, eliminating the influence of temperature, and improving the response speed

Inactive Publication Date: 2009-12-16
SHANGHAI BOOM FIBER SENSING TECH +1
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Problems solved by technology

[0006] (1) The existing optical fiber sensing device can only measure a single parameter, and cannot measure multiple parameters at the same time;
[0007] (2) The device for measuring stress will be affected by temperature, and the accuracy is low;
[0008] (3) The computer is used to process data, and the processing speed is slow, which affects the detection response speed

Method used

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  • Distributed optical fiber stress temperature sensing device and sensing method thereof

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Embodiment Construction

[0039] Preferred embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0040] see Figure 1 , the present invention discloses a distributed optical fiber stress temperature sensing device, which includes a light source 10, a pulse modulator 20, a circulator 30, a coupler 40, a Raman optical filter 51, a Brillouin optical filter optical device 52 , Raman photodetector 61 , Brillouin photodetector 62 , first amplifier 71 , second amplifier 72 , data collector 80 , data processor 90 , and computer 100 .

[0041] The light source 10 is used to emit continuous light; it includes a connected laser driver 12 and a laser 11; the laser driver 12 is used to drive the laser 11 to emit laser light. In this embodiment, the laser driver 12 is a current driver made of a high-speed circuit, which can well drive the laser to emit laser light; the laser 11 is a semiconductor laser, which can emit laser light according to the dri...

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Abstract

The invention discloses a distributed optical fiber stress temperature sensing device and a sensing method. The sensing device comprises a light source, a pulse modulator, a circulator, a coupler, a Raman light filter, a Brillouin light filter, a Raman light detector, a Brillouin light detector, a first amplifier, a second amplifier, a data collector, a data processor and a computer. Specific light penetrates the Raman light filter and the Brillouin light filter respectively; the data processor calculates stress information and temperature information respectively according to the information of the specific light. The distributed optical fiber stress temperature sensing device can measure temperature and stress simultaneously while guaranteeing the measuring performance, and can eliminate the influence of the temperature when the stress is measured, thus improving precise of stress measurement.

Description

technical field [0001] The invention relates to a distributed optical fiber sensing device, in particular to a distributed optical fiber sensing device capable of simultaneously measuring temperature and stress; in addition, the invention also relates to a sensing method of the sensing device. Background technique [0002] Distributed optical fiber sensing system is mainly used in transportation, construction, electric power, coal mine, petrochemical and other industries, and its role is to measure various parameters of these important places in real time. It plays an important role in ensuring the normal operation of industrial system equipment and ensuring the safety of life and property. [0003] The existing distributed optical fiber sensing device is composed of a laser driver, a laser, a coupler, an optical filter, a detector, a signal amplifier, a data collector, a data processor and a computer. Its working principle is: the laser continuously emits laser light into ...

Claims

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Application Information

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IPC IPC(8): G01L1/24G01K11/32G01K11/322G01K11/324
Inventor 仝芳轩周正仙皋魏席刚
Owner SHANGHAI BOOM FIBER SENSING TECH
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