Device and method for detecting two-path Raman scattering light by same circuit

Abstract

The invention relates to a device for detecting two paths of raman light by using the same circuit, which comprises a laser device, a controller and a control terminal and a laser driver, wherein the laser 13 of the laser device is reflected by an anti-Stocks lens 9 and a Stocks lens 10 to enter into a sensing optical fiber 5, and the backscattering signals of the laser 13 are separated by a Stocks-and-Stocks time segment coupler to be transmitted into a detector and an amplifier to enter into a data collector, a computer is connected with a data processor controlling a synchronous controller and receiving the data of the data collector, the synchronous signal output of the synchronous controller is connected with the laser driver and the datacollector and transmit synchronous signals to them for realizing synchronous operation. The distribution optical fiber temperature sensing device avoids bandwidth limitation and deviation difference to improve measurement accuracy.

Description

technical field [0001] The invention relates to the technical field of distributed optical fiber temperature sensing equipment, in particular to a distributed optical fiber temperature sensing device which uses the same circuit to detect Stocks and anti-Stocks light and its application method. Background technique [0002] Optical fiber temperature sensing devices are mainly used in transportation, construction, electric power, coal mining, petrochemical and other industries, and their role is to monitor the real-time temperature of these important places. 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 optical fiber temperature sensing device is composed of a laser driver, a laser, a synchronous controller, a coupler, a reference optical fiber, an optical filter, a photoelectric probe, a signal amplifier, a data collector and a computer. Its working principle is: ...

AI Technical Summary

Problems solved by technology

[0005] 1. Because it is a branch measurement, it requires a large optical signal;

[0006] 2. The device has bandwidth limitations and deviation differences, and the temperature measurement accuracy is not high;

[0007] 3. Multiple sets of devices are used, and the equipment cost is high;

[0008] 4. The stability of the instrument is not good, and the amount of data to be processed is large

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