A seismic model velocity detection method
A speed detection and model technology, applied in seismic survey, seismology, teaching model, etc., can solve problems such as different test results, low-frequency signal interference of shaking table, voltage signal acquisition and processing, etc., to achieve accurate measurement results and ensure repeatability high degree of automation
Active Publication Date: 2021-03-19
CHINA PETROLEUM & CHEM CORP +1
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Problems solved by technology
[0004] ①Because the amplitude-frequency characteristics of the commonly used wave transmitting and receiving devices are not flat enough at present, the wave transmitting device cannot send vibration output signals of equal amplitude at each frequency point, and the wave detecting device cannot achieve equal amplitude reception; that is, the wave transmitting device cannot The flat voltage driving signal is converted into a flat vibration driving signal, and the wave receiving device cannot convert the flat vibration signal into a flat voltage signal for collection and processing
The result of this is that the resonant frequency f obtained is not accurate enough
[0005] ② Poor repeatability
Since the propagation of the wave in the tested sample is related to the coupling between the wave transmitting and receiving device and the tested sample, different test results will be caused if the degree of compression is different.
[0006] ③ There are many manual interventions and the test efficiency is low. The test results are related to the habits and qualities of the experimenters
In addition, the vibrating table is susceptible to interference from external low-frequency signals transmitted from the ground.
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[0033] The details of the present invention can be understood more clearly with reference to the accompanying drawings and the description of specific embodiments of the present invention. However, the specific embodiments of the present invention described here are only for the purpose of explaining the present invention, and should not be construed as limiting the present invention in any way. Under the teaching of the present invention, the skilled person can conceive any possible deformation based on the present invention, which should be considered as belonging to the scope of the present invention, and the present invention will be further described below in conjunction with the accompanying drawings.
[0034] Such as figure 1 As shown, the seismic model velocity detection method includes the following steps:
[0035] S1) fixing the earthquake model to be detected;
[0036] S2) sending constant-amplitude vibration waves to one end of the seismic model;
[0037] S3) de...
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The invention discloses a seismic model velocity detection method, wherein the seismic model velocity detection method includes the following steps: S1) fix the seismic model to be detected; S2) transmit constant amplitude vibration waves to one end of the seismic model; S3) Detect the vibration wave passing through the other end of the seismic model; S4) Calculate the propagation speed of the constant amplitude vibration wave in the seismic model. The earthquake model velocity detection method disclosed in the present invention is simple to operate and has accurate measurement results. At the same time, it emits constant amplitude vibration waves to increase the accuracy of the measurement results. The detection method has the advantage of repeatability; the earthquake model velocity detection method of the present invention is in the detection process. Medium, high degree of automation, no manual intervention is required, and the error caused by manual intervention on the measurement results is reduced.
Description
technical field [0001] The invention relates to the technical field of geophysics, in particular to a method for detecting velocity of an earthquake model. Background technique [0002] The resonance method is an important method for measuring the velocity of elastic waves, which is based on the principle of standing waves, whose vibrations are similar to those in organ pipes. The measured sample contains an integer number of half-wavelengths of vibration, that is, the sample length L=n(λ / 2), where n is an integer, and λ is the wavelength of the standing wave, so the phase velocity of the wave v=λf=2Lf / n . [0003] The equipment required by this method is relatively simple, but the following problems exist when the laboratory uses this method for speed measurement: [0004] ①Because the amplitude-frequency characteristics of the commonly used wave transmitting and receiving devices are not flat enough at present, the wave transmitting device cannot send vibration output si...
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IPC IPC(8): G01H5/00G01V1/00G09B23/40
CPCG09B23/40G01H5/00G01V1/01
Inventor 宋遐龄薛诗桂王辉明刘东方
Owner CHINA PETROLEUM & CHEM CORP