Optical fiber displacement sensing system-based displacement measurement signal analysis method

Abstract

The present invention relates to an optical fiber displacement sensing system-based displacement measurement signal analysis method. The main objective of the invention is to solve the technical problems of poor environmental adaptability, serious influence of environmental factors and poor stability in the prior art. According to the method of the invention, a signal source, an object to be measured and a bisector power divider connected with the signal source are adopted; the first output end of the bisector power divider is connected with a directly modulated laser; the directly modulated laser is connected with an optical fiber displacement sensing probe; the optical fiber displacement sensing probe is connected with a high-speed photoelectric detector; the radio frequency input end of an IQ mixer is connected with the high-speed photoelectric detector; the local oscillation input end of the IQ mixer is connected with the second output end of the bisector power divider; the output end of the IQ mixer is connected with a post-processing module; the signal source is used for outputting microwave signals; the microwave signals pass through the bisector power divider and then are converted into optical carrier signals by the directly modulated laser; and the high-speed photoelectric detector is used for converting the optical wave signals into microwave signals. With the method provided by the technical schemes of the invention adopted, problems can be well solved. The method can be applied to the optical fiber displacement sensor industry production.

Description

technical field

[0001] The invention relates to the sensor field, can be used in the communication field and medical equipment, and particularly relates to a displacement measurement signal analysis method based on an optical fiber displacement sensing system. Background technique

[0002] Sensors are developing towards sensitivity, precision, adaptability, compactness and intelligence. In this process, fiber optic sensors, a new member of the sensor family, are favored. Optical fiber has many excellent properties, including the performance of anti-electromagnetic and atomic radiation interference, the mechanical properties of thin diameter, soft quality and light weight; the electrical properties of insulation and non-induction; the chemical properties of water resistance, high temperature resistance and corrosion resistance, etc. It can play the role of human eyes and ears in high temperature areas, such as nuclear radiation areas, and can also go beyond human physiologic...

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