High fault-tolerant fiber optic microphone based on retroreflection

A retroreflection and microphone technology, which is applied in the direction of optical signal detection transducers, sensor components, microphone ports/microphone accessories, etc., can solve the problem of inability to ensure that the light beam returns to the sensing fiber in the original path, inability to receive optical signals, Modulated optical signal is weak and other problems, to achieve the effect of reducing physical disturbance, good ability to collect light, and improve receiving efficiency

Active Publication Date: 2022-05-24
CHANGSHA UNIVERSITY OF SCIENCE AND TECHNOLOGY
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  • Abstract
  • Description
  • Claims
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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

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  • High fault-tolerant fiber optic microphone based on retroreflection
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  • High fault-tolerant fiber optic microphone based on retroreflection

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Embodiment Construction

[0023] In order to make the purposes, 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 with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments These are some embodiments of the present invention, but not all embodiments. The components of the embodiments of the invention generally described and illustrated in the drawings herein may be arranged and designed in a variety of different configurations. Thus, the following detailed description of the embodiments of the invention provided in the accompanying drawings are not intended to limit the scope of the invention as claimed, but are merely representative of selected embodiments of the invention. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in t...

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Abstract

An embodiment of the present invention provides a high fault-tolerant fiber optic microphone based on retroreflection, including: a laser, an optical circulator, a photoelectric detector, a sensor probe body shell, an optical fiber collimator, a retroreflective material sheet, a vibrating diaphragm, a windproof Light transparent sound screen. A variety of structures form a retroreflection-based highly fault-tolerant fiber optic microphone in a reasonable form. The retroreflective material sheet can ensure that the light incident on the sheet returns to the light source from the opposite direction close to the incident light within a large angle range, greatly improving The light receiving efficiency allows the partial structure of the sensing probe to shift, which enhances the structural fault tolerance of the sensing probe. The invention has the advantages of simple structure, low manufacturing cost, strong anti-interference ability, good structural fault-tolerant ability and wide detection frequency range.

Description

technical field [0001] The invention relates to the field of optical fiber sensing, in particular, to a high fault-tolerant optical fiber microphone based on retroreflection. Background technique [0002] The optical fiber microphone is a sensor that detects the sound signal by using the light transmission characteristics of the optical fiber and the modulation effect of the sound on the optical signal in the optical fiber. 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. Reflective intensity-modulated fiber optic microphone has the characteristics of simple structure and high detection sensitivity, and is a hot research topic at home and abr...

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Application Information

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Patent Type & Authority Patents(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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