A Laser Ultrasonic Experimental Method for a Physical Model of Undulating Surface

A technology of laser ultrasound and experimental methods, applied in geophysical measurement, teaching models, seismology, etc., can solve problems that affect the real effect of signal detection

Active Publication Date: 2019-06-04
CHINA PETROLEUM & CHEM CORP +1
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Problems solved by technology

The wave detection environment changes, which affects the real effect of signal detection

Method used

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  • A Laser Ultrasonic Experimental Method for a Physical Model of Undulating Surface
  • A Laser Ultrasonic Experimental Method for a Physical Model of Undulating Surface
  • A Laser Ultrasonic Experimental Method for a Physical Model of Undulating Surface

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[0035] Preferred embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although preferred embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.

[0036] The invention realizes a laser-ultrasonic-based undulating surface earthquake model experiment method by combining laser ultrasonic technology, three-axis positioning technology and laser vibration measurement technology. A complete set of rapid, high-precision, multi-wave detection and non-destructive seismic detection based on laser ultrasound The model experiment method can be applied to the earthquake model physical experiment of...

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Abstract

The present invention provides a laser ultrasonic experiment method of an irregular surface physical model. The method comprises the following steps: spraying microscale powder to an excitation point at the surface of an earthquake model through adoption of a duster; emitting laser to the excitation point at the surface of the earthquake model through adoption of a laser, light beam is rapidly absorbed by powder to form rapidly expanded plasma and generate shock wave; receiving reflected shock wave through adoption of a laser vibration measurer. The method provided by the invention perform control of energy output of the laser to a measured curve surface object to perform high-density, wide-band and three-component collection of the ultrasonic reflection signals of the curve surface model so as to really simulate the generation process and the collection process of the field earthquake signals in a laboratory.

Description

technical field [0001] The invention relates to a laser ultrasonic-based geophysical model ultrasonic experiment method, which belongs to the field of vibration detection. Background technique [0002] The ultrasonic seismic physical model experiment is to carry out indoor simulation observation of the propagation of seismic waves in various complex geological bodies through the propagation of ultrasonic waves in the geological model, and conduct seismological research according to the observation results. At present, the commonly used ultrasonic detection methods generally use piezoelectric ultrasonic probes for ultrasonic transmission and reception. When measuring solid materials, the transmitting probe and receiving probe are close to the surface of the measured object. The transmitting head converts electrical signals (usually narrow pulses) into ultrasonic signals, while the receiving head converts ultrasonic signals into electrical signals. Due to the principle, the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G09B23/40G01V1/00
CPCG01V1/00G09B23/40
Inventor 宗遐龄薛诗桂王辉明刘东方
Owner CHINA PETROLEUM & CHEM CORP
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