Control method and control device for obtaining coal sample transverse wave signal based on ultrasonic test
A technology of shear wave and signal, which is applied to the analysis of solids by using sound wave/ultrasonic wave/infrasonic wave. It can solve the problems of low precision of shear wave signal and inability to accurately identify the first arrival of shear wave, and achieve the effect of improving calculation accuracy.
Active Publication Date: 2012-12-19
INST OF GEOLOGY & GEOPHYSICS CHINESE ACAD OF SCI +1
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[0005] The technical problem to be solved by the present invention is to provide a control method and device for obtaining coal sample shear wave signals based on ultrasonic testing, which solves the problem that the current method of ultrasonic testing of coal samples to obtain shear wave signals cannot accurately identify the first arrival of shear waves, resulting in the acquisition of coal samples. The problem of low accuracy of the sample shear wave signal
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[0030] The control method of the present invention based on the ultrasonic test to obtain the coal sample shear wave signal needs to carry out information and / or data collection through the information interaction between the various devices in the system in the specific implementation, and through the controller (which can be CPU, etc.) control and process information and / or data, the present invention does not make any limitation to this), during which information and / or data can also be stored and transmitted through various storage devices (memory, hard disk or other storage devices), the present invention This is without limitation.
[0031] The invention picks up the first arrival of the shear wave through the polarization characteristics of the shear wave, improves the calculation accuracy of the shear wave velocity, effectively filters out the interference such as the converted longitudinal wave through broadband filtering, and extracts a relatively pure transmitted she...
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The invention discloses a control method and a control device for obtaining a coal sample transverse wave signal based on an ultrasonic test. The method comprises the following steps: receiving a transverse wave signal in a mode of receiving from two orthogonal directions synchronously by a receiving end; after picking up the first arrival of a transverse wave according to polarization characteristic difference of a transiting longitudinal wave and a transmitting transverse wave; and carrying out the broadband filtering according to frequency difference of a valid signal and an interference signal of the transverse wave so as to obtain a transverse waveform signal of an ultrasonic coal testing sample. With the adoption of the control method and the control device, the problem that the transverse wave signal for obtaining the coal sample is lower in precision as the transverse wave first arrival recognition cannot be carried out accurately by using the existing method for obtaining the transverse wave signal while carrying out the ultrasonic test to the coal sample is solved.
Description
technical field [0001] The invention relates to the field of ultrasonic testing of coal and rock, in particular to a control method and device for obtaining shear wave signals of coal samples based on ultrasonic testing. Background technique [0002] Because coal-rock ultrasonic testing can provide the basic physical basis for using seismic data and well logging data to detect the spatial distribution of coal seams, and according to the needs of coal and coalbed methane exploration and development, it can be predicted that laboratory ultrasonic testing of coal rocks will become more and more important. Therefore, it is very urgent and necessary to explore the ultrasonic measurement and processing technology for soft rocks such as coal and rock. [0003] At present, there is a problem that is often overlooked in coal-rock ultrasonic measurement: when performing shear wave ultrasonic measurement, some testers often directly pick up the take-off point of the entire transmission...
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IPC IPC(8): G01N29/07
Inventor 王赟张建利
Owner INST OF GEOLOGY & GEOPHYSICS CHINESE ACAD OF SCI