Sensitivity-enhanced quasi-distributed optical fiber pressure sensor

Abstract

The invention discloses a sensitivity-enhanced quasi-distributed optical fiber pressure sensor which is insensitive to temperature, multiplexed, and adjustable in stressed area, measurement sensitivity and measurement range, low in cost, stable in performance and easy to replace, the pressure sensor comprises a pressure panel, an elastic cylinder wound with optical fibers, a reference optical fiber fixing groove, a bottom shell, a limit telescopic rod and a fiber optic adapter, the elastic cylinder wound with the optical fiber is positioned on the bottom shell; the pressure panel is positionedabove the elastic cylinder wound with the optical fiber; a rectangular through hole is arranged in the center of the elastic cylinder wound with the optical fiber; a reference optical fiber is arranged in the reference optical fiber fixing groove; a sensing optical fiber is arranged on the elastic cylinder wound with the optical fiber, the input and output ends of the reference optical fiber andthe sensing optical fiber are electrically connected with the fiber optical adapter, the limit telescopic rod is arranged between the pressure panel and the bottom shell. The sensitivity-enhanced quasi-distributed optical fiber pressure sensor can be applied to scientific research, measurement and detection of a power plant and a gas plant, etc.

Description

technical field [0001] The invention relates to the technical field of optical fiber sensing, in particular to an enhanced-sensitivity quasi-distributed optical fiber pressure sensor. Background technique [0002] It is well known that with the rapid development of science and technology, electronic weighing instruments made of pressure sensors are also widely used in various industries to achieve fast and accurate weighing of pressure. However, the widely used pressure sensors based on electromagnetic technology Sensors are difficult to apply in environments with strict requirements and complex conditions such as power plants, substations, oil and gas wells, and chemical plants. Because the optical fiber sensor has the advantages of high sensitivity, small size, good electrical insulation, high temperature resistance, anti-electromagnetic interference, wide frequency band, and can realize uncharged all-optical probes, etc. Optical fiber sensing technology is widely used in...

AI Technical Summary

Problems solved by technology

These two optical fiber pressure sensors have high sensitivity and good linearity. However, the Fabry-Perot cavity has high requirements on the humidity and cleanliness of the environment, and cannot adapt to harsh environmental conditions. The accuracy requirements are very high, and it is difficult to achieve quasi-distribution and large-scale use

Fiber Bragg grating pressure sensors mainly have the problems of small measurement range and large temperature influence

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