Conical sound horn focusing coupled intrinsic interference type fiber grating ultrasonic sensor

A technology of ultrasonic sensor and optical fiber grating, which is applied in the field of sensors to achieve good response characteristics and improve the effect of signal-to-noise ratio

Inactive Publication Date: 2018-08-07
XI'AN PETROLEUM UNIVERSITY +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The technical problem to be solved by the present invention is to overcome the shortcomings of existing fiber grating sensors, and provide an intrinsic interfer

Method used

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  • Conical sound horn focusing coupled intrinsic interference type fiber grating ultrasonic sensor
  • Conical sound horn focusing coupled intrinsic interference type fiber grating ultrasonic sensor
  • Conical sound horn focusing coupled intrinsic interference type fiber grating ultrasonic sensor

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Embodiment 2

[0020] In this embodiment, one end of the housing 1 is closed, and the other end is equipped with an acoustic coupling cone 4. The diameter of the bottom surface of the acoustic coupling cone 4 is the same as the outer diameter of the housing 1, and the cone angle of the acoustic coupling cone 4 is 60°. Other components And the connection relation of parts is identical with embodiment 1.

Embodiment 3

[0022] In this embodiment, one end of the housing 1 is closed, and the other end is equipped with an acoustic coupling cone 4. The diameter of the bottom surface of the acoustic coupling cone 4 is the same as the outer diameter of the housing 1, and the cone angle of the acoustic coupling cone 4 is 120°. Other components And the connection relation of parts is identical with embodiment 1.

Embodiment 4

[0024] In the above embodiments 1-3, one end of the housing 1 is closed, and the other end is equipped with an acoustic coupling cone 4, the diameter of the bottom surface of the acoustic coupling cone 4 is the same as the outer diameter of the housing 1, and the diameter of the bottom surface of the acoustic coupling cone 4 is 1mm. The cone angle of the coupling cone 4 is the same as that of the corresponding embodiment, and the other components and their connection relations are the same as those of the first embodiment.

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Abstract

A conical sound horn focusing coupled intrinsic interference type fiber grating ultrasonic sensor is provided; one end of a housing is sealed, and the other end is provided with a sound coupling cone;a noise abatement pad is arranged between the sound coupling cone and the housing; the top and side wall of the sound coupling cone are processed with fiber mount holes; through holes matched with the fiber mount holes on the sound coupling cone side wall are processed on the housing side wall; one end of the fiber penetrates the fiber mount hole on the top of the sound coupling cone and extendsto the housing, and the other end penetrates the fiber mount hole on the side wall of the sound coupling cone and the through hole on the housing in sequence; the fiber is carved with a Bragg raster;a raster zone is arranged in the sound coupling cone. The conical sound horn focusing coupled intrinsic interference type fiber grating ultrasonic sensor is high in sensitivity, wide in response frequency band, good in reusability, can suit dynamic scanning acquisition in an earthquake physics model, can realize ultrasonic multilayer imaging, and can be applied in the structure nondestructive test, oil and gas field physics model imaging, elastic wave speed modeling and biological medical technical fields.

Description

technical field [0001] The invention belongs to the technical field of sensors, and in particular relates to a fiber grating ultrasonic sensor. Background technique [0002] Ultrasonic seismic physical model detection technology uses ultrasonic waves to simulate seismic waves, uses seismic physical models to simulate stratum structures, and conducts experimental simulations of different types of stratum landforms and oil and gas storage states in the laboratory by means of proportional reduction. Different types of data models provide information guidance for exploration and exploitation of strata resources. The ultrasonic sensor is the core device for obtaining the internal information of the earthquake physical model. The traditional ultrasonic detection device is mainly a piezoelectric ceramic transducer (piezoelectric transducer, PZT), which can be used as both an ultrasonic transmitting source and a receiver. The main disadvantages of this device are: narrow response ...

Claims

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Application Information

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IPC IPC(8): G01H9/00
Inventor 尹逊莉陈凤仪乔学光荣强周
Owner XI'AN PETROLEUM UNIVERSITY
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