Analog ultrasonic wave earthquake signal physical excitation and receiving system and method thereof

Abstract

The present invention provides an analog ultrasonic seismic signal physical excitated, receiving system of its method. The system includes an excitation source, an ultransonic transmitting probe, an ultransonic receiving probe, an analog-to-digital converter, an amplifier, a center signal processing and controlling unit and an input / output exterior unit; further including a controlling adjustable voltage control unit set in the signal excitation source and gain control unit of the receiving signal set in the signal receiving terminal. The invention processes quantification control to the emitting energy and receiving gain to meet needs of complex multi-layer physical model observation in the laboratory. The invention adds quantitative control pulse signal launch procedure and structure in the excitation source, making the high-low amplitude of the emitting energy quantitative control, processing quantitative set for signal from different channels on one hand, on the other hand adds quantitative control magnified steps and structure in the amplifier of the receiving end, resolving the technical problem of the lower accuracy and receiving signal distortion in the present technology.

Description

Technical field: [0001] The invention relates to an ultrasonic transmitting and receiving detecting device and method thereof, in particular to a laboratory acquisition device and method thereof for ultrasonic detection and detection of geological models when simulating field seismic exploration under laboratory conditions, belonging to the field of ultrasonic detection . Background technique: [0002] Seismic physical simulation is an effective experimental technique for petroleum exploration and development. It is a scientific research method carried out on the basis that the geometric parameters and physical parameters of the model medium satisfy the similarity ratio principle and the corresponding principle. Modern earthquake physical simulation is an earthquake simulation method that makes the field geological structure and geological body into a physical model according to a certain simulation ratio in the laboratory, and uses ultrasonic and other methods to simulate ...

AI Technical Summary

Problems solved by technology

[0009] 1. The pulse generator in the excitation source cannot quantitatively control the high and low amplitude of the pulse signal emission, resulting in technical problems of low accuracy and distortion: For different channel signals, in order to reflect the reflected signal of the longer channel, it is necessary to output the signal from the signal source Turn it up, but the reflection near the channel is too strong at this time, and the output will be cut off, which will cause saturation distortion-distortion

When the output signal of the signal source is small, the reflection near the channel is normal, but the reflection of the far channel cannot be reflected because the signal is too small

That is, it is impossible to quantitatively control the amplitude of the high-voltage narrow pulse output at the signal transmitting end according to actual needs

[0010] 2. The amplifier in the receiving end cannot be amplified according to the different changes in energy absorption and reflection of each stratum, resulting in technical problems of low accuracy and distortion of the received signal: for the same signal, the transmitted signals of the deep layer and the shallow layer are different. Yes, under normal circumstances, the deep reflection signal is weak and the shallow reflection signal is strong

In order to make the deep reflection large enough, the amplification factor of the amplifier needs to be increased, but at this time, the shallow reflection signal will be too strong, and the output will be clipped-distorted; otherwise, the deep layer signal will not come out if the amplification factor of the amplifier is reduced -distortion

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