Distributed Raman optical fiber temperature sensor system

Abstract

The invention discloses a distributed Raman optical fiber temperature sensor system. The system comprises a case as well as a control module, a pulse laser generator, a optical splitter, an optical switch, an optical amplifier, a wavelength division multiplexer, a photodetector, a computer system, and a power source which are all installed in the case; the control module is in control connection with the pulse laser generator, the optical switch, and the computer system; the pulse laser generator is connected with the input / output end of the optical splitter; the output / input end of the optical switch is connected with the first output / input end of the optical splitter; the input / output end of the optical switch is connected with a sensing optical fiber; the second output / input end of theoptical splitter is connected with the input end of the optical amplifier; the output end of the optical amplifier is connected with the input end of the wavelength division multiplexer; the output end of the wavelength division multiplexer is connected with the input end of the photodetector; and the output end of the photodetector is connected with the computer system. The distributed Raman optical fiber temperature sensor system of the invention has the advantages of long-distance continuous temperature sensing, wide application range, low construction cost and the like.

Description

technical field [0001] The invention relates to a distributed Raman optical fiber temperature sensor system. Background technique [0002] Temperature is an important indicator in production and life. Temperature sensors are widely used in all walks of life. Traditional temperature sensing is based on electrical signals. It is safe and stable in the application scenarios of flammable, explosive or strong electromagnetic infection. Poor, the traditional point sensor cannot continuously detect and detect, and the detection distance is very limited, and it is necessary to lay a dedicated signal line to increase the investment cost. [0003] The distributed Raman fiber optic temperature sensing system is based on the Raman effect and uses optical fiber as a temperature sensitive medium and signal transmission carrier. When the light source propagates in the optical fiber, due to the Raman scattering of light, the main Scattering peaks are generated on both sides of the light so...

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Problems solved by technology

[0004] The incident light of the existing Raman fiber optic temperature sensor is likely to interfere with the Raman scattered light and affect the measurement. At the same time, the detection sensitivity and detection distance are limited, so it cannot be used in occasions that require high detection sensitivity; without PWM ports and linear ports, only It lacks the ability to control the execution unit of the back end for temperature sensing; it is not user-friendly without an audio output port

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