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Fiber laser microphone with special-shaped spring type sensibilization structure

A special-shaped spring and fiber laser technology, applied in instruments, measuring ultrasonic/sonic/infrasonic waves, measuring devices, etc., can solve problems such as insufficient low-frequency detection performance

Active Publication Date: 2021-05-18
BEIJING INST OF AEROSPACE CONTROL DEVICES
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] The technical problem of the present invention is: to overcome the deficiencies in the prior art, a fiber laser microphone with a special-shaped spring-type sensitization structure is proposed, which solves the problem of the existing optical fiber Insufficient performance of laser microphone for low-frequency detection

Method used

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  • Fiber laser microphone with special-shaped spring type sensibilization structure
  • Fiber laser microphone with special-shaped spring type sensibilization structure
  • Fiber laser microphone with special-shaped spring type sensibilization structure

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Embodiment

[0063] The center of the special-shaped spring 2 of the present invention is provided with an axial rectangular groove, and each of the two ends is respectively provided with a fan-shaped boss, followed by a left fan-shaped boss 10 and a right fan-shaped boss 11, and the axis of the fan-shaped boss coincides with the axis of the protection frame 4 . The special-shaped spring 2 is inserted into the protection frame 4 along the axial direction. A pair of fixed cover plates 1 are respectively arranged at the two ends of the protective frame 4, and the outer fan-shaped boss of the special-shaped spring 2 is inserted into the central through hole of the fixed cover plate 1 in turn, and the fixed cover plate 1 and the special-shaped cover plate 1 are connected by the fixed connecting bolts 3. The spring 2 and the protective frame 4 are fixed in position; among them, the protective frame 4, the special-shaped spring 2 and the fixed cover are filled with GF-5 polyurethane potting glue...

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Abstract

The invention discloses a fiber laser microphone with a special-shaped spring type sensibilization structure. The fiber laser microphone comprises a special-shaped spring, a sound transmission frame, a pair of fixed cover plates and a fiber laser fiber grating. According to the fiber laser microphone, by optimally designing the special-shaped spring which is a core sensitive element of the optical fiber laser microphone, excellent performances such as simple structure, simple packaging process, short production period, ultrahigh sound pressure level resistance, small temperature drift, flat response in working bandwidth, stable performance, good consistency and the like are realized; and accurate measurement of air sound signals in a broadband range can be realized, sensitivity fluctuation is small, and accurate measurement of air sound signals at an ultrahigh sound pressure level is realized.

Description

technical field [0001] The invention relates to an optical fiber laser microphone with a special-shaped spring-type sensitization structure, and belongs to the technical field of underwater acoustic detection of optical fiber laser microphones. In particular, it is a fiber laser microphone that is resistant to ultra-high sound pressure level signals and has flat low frequency response. Background technique [0002] Aeroacoustic detection is the technical basis for research in various fields such as indoor acoustics research, street noise pollution research, aeroacoustic positioning, and aeroacoustic physics research. The acoustic performance of the microphone is an important indicator for measuring the ability of aeroacoustic detection. Key research directions. At present, microphones can be divided into two categories: piezoelectric microphones and fiber optic microphones. Due to high sensitivity, wide dynamic range of testing, passive probe, anti-electromagnetic interfere...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01H9/00
CPCG01H9/004
Inventor 张宇飞姚树智赵俊鹏张子昊杨勇王学锋
Owner BEIJING INST OF AEROSPACE CONTROL DEVICES
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