Optical fiber sensing device based on ultrasonic frequency detection, and implementation method thereof

A technology for detecting frequency and optical fiber sensing, applied in frequency measurement devices, voltage/current isolation, etc., can solve the problems of poor long-term operation stability, low sensitivity, and easy to be affected by external environment, and improve the sensitivity and operation cycle. , improve sensitivity, reduce low sensitivity and the effect of being susceptible to external environmental factors

Active Publication Date: 2021-04-09
哈尔滨启翱科技有限公司
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Problems solved by technology

Therefore, in view of the problems of low sensitivity, poor long-term operation stability, and easy to be affected by the external environment in the existing technology, a fiber optic sensing device with higher sensitivity, good stability, and long-term operation for ultrasonic detection frequency and its realization are proposed. method

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  • Optical fiber sensing device based on ultrasonic frequency detection, and implementation method thereof
  • Optical fiber sensing device based on ultrasonic frequency detection, and implementation method thereof
  • Optical fiber sensing device based on ultrasonic frequency detection, and implementation method thereof

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Embodiment Construction

[0034] The following embodiments will describe the specific implementation of an optical fiber sensing device and implementation method based on ultrasonic detection frequency proposed by the present invention with reference to the accompanying drawings.

[0035] Such as figure 1 As shown, the present invention provides a structural diagram of an optical fiber sensing device based on ultrasonic detection frequency and its implementation method, the ASE light source (1) emits a light beam that is transmitted to the fiber coupler (2), and the fiber coupler (2) outputs the light beam for transmission To the sensing unit (3), the light beam is reflected and transmitted in the sensing unit (3), when the sensing unit (3) is placed in the ultrasonic generating device (4), under the action of the ultrasonic generating device (4), The quartz diaphragm (3-4) of the sensing unit (3) is deformed, which changes the air F-P cavity formed by the silicon ring (3-3), affects the optical path o...

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Abstract

The invention provides an optical fiber sensing device based on ultrasonic frequency detection, and an implementation method thereof. The optical fiber sensing device comprises an ASE light source, an optical fiber coupler, a sensing unit, an ultrasonic generation device, a photoelectric converter and a signal processing module. According to the invention, sensing is carried out through the optical fiber, the Fabry-Perot cavity principle is utilized, light emitted by the ASE light source generates an interference spectrum in the Fabry-Perot cavity, the interference spectrum is detected, the ultrasonic frequency is measured, digital output is realized through the signal processing module, and the purpose of displaying on a computer is achieved. According to the invention, the size of the sensing unit is reduced, the sensing sensitivity is increased, and the purpose of monitoring the ultrasonic frequency is realized. Meanwhile, the ultrasonic frequency can be output on the host, and real-time monitoring of the ultrasonic frequency is achieved.

Description

technical field [0001] The invention belongs to the technical field of optical fiber sensing, and in particular relates to an optical fiber sensing device and an implementation method based on ultrasonic detection frequency. Background technique [0002] At present, the optical fiber sensing technology is gradually improving, and the monitoring device of optical fiber sensing is also becoming more and more perfect. Among them, in the optical fiber sensing device, the dielectric material and the structure of the sensing device will have a great impact on the optical fiber sensing. At present, there are many devices and methods for implementing ultrasonic monitoring using optical methods. [0003] Huang Jun et al. (Huang Jun, Wen Yi, Jiang Fei, Zhang Changsheng, Zhao Zhengang, Li Chuan. Research on the characteristics of optical fiber F-P cavity sensors [J]. Sensors and Microsystems, 2017, 36(04): 68-70.) proposed A sensor structure based on an optical fiber FP cavity, which ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R23/02G01R15/22
CPCG01R15/22G01R23/02
Inventor 沈涛恭艾娜陈姣姣刘驰王振家黄海姜金刚
Owner 哈尔滨启翱科技有限公司
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