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High-fault-tolerance optical fiber microphone based on retro-reflection

A retro-reflection and microphone technology, applied in the direction of optical signal detection transducers, sensors, electrical components, etc., can solve problems such as the inability to ensure that the beam returns to the sensing fiber in the same way, the inability to receive optical signals, and the weak modulated optical signals, etc. Achieve the effect of reducing physical disturbance, good ability to collect light, and improving receiving efficiency

Active Publication Date: 2020-10-16
CHANGSHA UNIVERSITY OF SCIENCE AND TECHNOLOGY
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, the traditional reflective modulation fiber optic microphone uses ordinary optical fiber to transmit and receive light, so the received modulated light signal is very weak and difficult to detect; in addition, it is reflected by the mirror mirror, and there is a small deflection in the sensor probe structure. Time-shifting, there is no guarantee that the light beam can return to the sensing fiber in the original path, resulting in the inability to receive the optical signal

Method used

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Embodiment Construction

[0023] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments It is a part of embodiments of the present invention, but not all embodiments. The components of the embodiments of the invention generally described and illustrated in the figures herein may be arranged and designed in a variety of different configurations. Accordingly, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without mak...

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Abstract

The embodiment of the invention provides a high-fault-tolerance optical fiber microphone based on retro-reflection. The high-fault-tolerance optical fiber microphone comprises a laser, an optical circulator, a photoelectric detector, a sensing probe main body shell, an optical fiber collimator, a retro-reflection material sheet, a vibrating diaphragm and a windproof, lightproof and sound-transmitting screen. A plurality of structures form the high-fault-tolerance optical fiber microphone based on retro-reflection in a reasonable form, wherein the retro-reflection material sheet can ensure thatthe light incident on the sheet returns to the light source from the reverse direction close to the incident light within a larger angle range, so that the light receiving efficiency is greatly improved, partial structure of the sensing probe is allowed to deviate, and the structure fault tolerance of the sensing probe is enhanced. The device is simple in structure, low in manufacturing cost, high in anti-interference capability, good in structure fault-tolerant capability and wide in detection frequency range.

Description

technical field [0001] The invention relates to the field of optical fiber sensing, in particular, it relates to a highly fault-tolerant optical fiber microphone based on retroreflection. Background technique [0002] Optical fiber microphone is a sensor that detects sound signals by using the light transmission characteristics of optical fibers and the modulation effect of sound on optical signals in optical fibers. Fiber optic microphones have the advantages of high sensitivity, wide linear range, and good frequency response characteristics, especially fiber optic microphones are passive devices, suitable for flammable and explosive places, and fiber optic microphones are resistant to electromagnetic interference, especially in the field of national defense security monitoring. unique advantage. The reflective intensity-modulated fiber optic microphone has the characteristics of simple structure and high detection sensitivity, and it is a hot research topic at home and ab...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04R1/08H04R23/00
CPCH04R1/08H04R23/008
Inventor 何茜谭承旦蒋恒
Owner CHANGSHA UNIVERSITY OF SCIENCE AND TECHNOLOGY
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