Scanning signal correction method and device
A technology of scanning signals and correction methods, which is applied in the identification of patterns in signals, special data processing applications, complex mathematical operations, etc., can solve the problems of insignificant reduction of ground response and vibration system distortion, and complicated transformation, and achieves reduction of differences, Reduce distortion energy and improve the effect of harmonic noise
Pending Publication Date: 2021-07-16
BC P INC CHINA NAT PETROLEUM CORP +1
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[0004] In order to solve the defects of complex modification and inconspicuous reduction of distortion between the ground response and the vibrator system in the existing way of improving the response accuracy through hardware modification to reduce distortion, the first aspect of the present invention provides a scanning signal correction method, including:
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[0057] In order to make the technical features and effects of the present invention more obvious, the technical solutions of the present invention will be further described below in conjunction with the accompanying drawings. The present invention can also be described or implemented in other different specific examples. The equivalent transformations done within all belong to the protection category of the present invention.
[0058] In the description of this specification, the terms "first" and "second" are not used to specifically refer to the order or order, nor are they used to limit the present invention. They are only used to distinguish elements or operate. A description referring to the terms "an embodiment", "a specific embodiment", "for example" and the like means that a specific feature, structure or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present application. In this specificati...
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The invention provides a scanning signal correction method and device, and the method comprises the steps: obtaining a force signal through a preset scanning signal; carrying out discrete cosine transform on the preset scanning signal and the force signal to obtain a harmonic spectrum of the preset scanning signal and the force signal; obtaining a residual harmonic spectrum and a residual harmonic spectrum time-frequency signal according to a preset scanning signal and the force signal harmonic spectrum; correcting a preset scanning signal by using the residual harmonic spectrum time-frequency signal to obtain a new scanning signal; obtaining a new force signal by using the new scanning signal, judging the difference between the preset scanning signal and the new force signal, if the difference between the preset scanning signal and the new force signal is within a preset range, outputting the new scanning signal, and if the difference between the preset scanning signal and the new force signal exceeds the preset range, updating the force signal by using the new force signal, and executing the previous steps again. Full-band harmonic noise can be suppressed, distortion energy can be reduced, and low-frequency effective signals can be enhanced.
Description
technical field [0001] The invention relates to the field of vibrator scanning signals, in particular to a scanning signal correction method and device. Background technique [0002] When the vibrator excites the seismic signal, the scanning signal (frequency-variable time signal) controls the output energy of the vibrator system, but there is a difference between the scanning signal and the output force signal, which comes from a complex system response First of all, the scanning signal is converted into a drive. Due to the corresponding nonlinearity of the hydraulic pressure, the signal is distorted. At the same time, the hydraulic system drives the vibrator system and there is also distortion. Finally, the response of the ground and the vibrator system still have distortion. The comprehensive distortion caused by these factors is difficult to use. A simple function is described, and the result of distortion is that the output energy is different from the expected first, a...
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IPC IPC(8): G06F17/14G06K9/00G01V1/04
CPCG06F17/147G01V1/04G06F2218/04
Inventor 骆飞张慕刚汪长辉魏铁周大同
Owner BC P INC CHINA NAT PETROLEUM CORP