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Solid/fluid interfacial wave detecting device and method based on vector hydrophone

A technology of vector hydrophones and detection devices, applied in the direction of measuring devices, instruments, and measuring vibrations, can solve the problems of low detection efficiency, expensive detection equipment, single detection method, etc., and achieve large data collection and good anti-coherence Interference capability and high detection reliability

Inactive Publication Date: 2013-03-20
HOHAI UNIV CHANGZHOU
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Problems solved by technology

[0007] All the above-mentioned methods can achieve the purpose of detecting the fluid-solid interface wave in a specific situation to a certain extent, but limited by the detection conditions, there are problems such as expensive detection equipment, low detection efficiency, and single detection method

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  • Solid/fluid interfacial wave detecting device and method based on vector hydrophone
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  • Solid/fluid interfacial wave detecting device and method based on vector hydrophone

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Embodiment Construction

[0052] The present invention will be further described below in conjunction with accompanying drawing. The following examples are only used to illustrate the technical solution of the present invention more clearly, but not to limit the protection scope of the present invention.

[0053] Such as figure 1 As shown, the fluid-solid interface wave detection device of the present invention mainly consists of six parts: an excitation signal module 1; a signal transmitting module 2; a signal receiving module 3; a signal collecting module 4; a signal processing and display module 5; The signal transmitting module 2 uses a piezoelectric ceramic sheet as a transmitting transducer to generate interface wave signals. In order to ensure a large-amplitude interface wave signal, the excitation signal module 1 generates a square wave pulse signal with variable pulse width and frequency, and adjusts the pulse width to 1 / 2 of the rated frequency of the piezoelectric ceramic sheet. The select...

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Abstract

The invention discloses a solid / fluid interfacial wave detecting device and a method based on a vector hydrophone and belongs to the technical field of ultrasonic testing and analysis. A signal exciting module generates square-wave pulse signals; an excitation signal radiation module generates interfacial waves which spread along an interface; the vector hydrophone in a signal receiving module is used for receiving the interfacial wave signals directly in water next to the interface, can obtain vector information of a sound field and improve noise jamming resistance and line spectrum detection capacity of a system, is fixed on a cross support composed of a double-shaft screw rod moving table, and moves accurately through an external control circuit; and finally a signal collecting module transmits the collected waveform data to a computer terminal for data processing and display. The method is flexible and convenient, detection at any position and array receiving of the solid / fluid interfacial waves can be achieved, the data connecting quantity is large, and the detecting accuracy and reliability can be improved greatly through post signal processing.

Description

technical field [0001] The invention relates to a detection device and a detection method for fluid-solid interface waves, belonging to the technical field of ultrasonic detection and analysis. Background technique [0002] The development of acoustic technology provides an effective means for non-destructive evaluation, stress detection and defect detection. Because the fluid-solid interface wave has the characteristics of large amplitude, small propagation loss, and small dispersion, the propagation in the medium can reflect many information in various fluid-solid media, such as the permeability, density, smoothness, and fracture characteristics of the solid medium. Liquid concentration, impurity content, etc. In recent years, the application of fluid-solid interface waves in geophysics, non-destructive testing and other fields has aroused widespread interest among researchers, and is currently widely used in dam monitoring, geological exploration, sediment content detecti...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01H3/00
Inventor 韩庆邦徐杉赵胜永王茜李建殷澄朱昌平
Owner HOHAI UNIV CHANGZHOU
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