Multi-channel debris flow geosound processing circuit and method
A technology for processing circuits and debris flow. It is used in vibration measurement, measurement devices, instruments, etc. It can solve the problems of low accuracy of geoacoustic acquisition, and achieve the effects of comprehensive detection data, good channel consistency, and simplified signal processing circuits.
Active Publication Date: 2018-05-29
航天科工惯性技术有限公司
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[0003] The purpose of the present invention is to overcome the deficiencies of the prior art and provide a multi-channel debris flow geoacoustic acquisition circuit and method, which can solve the problem of low accuracy of geoacoustic acquisition
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[0036] Specific embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings. In the following description, for purposes of explanation and not limitation, specific details are set forth in order to provide a thorough understanding of the invention. It will be apparent, however, to one skilled in the art that the present invention may be practiced in other embodiments that depart from these specific details.
[0037] It should be noted here that, in order to avoid obscuring the present invention due to unnecessary details, only the device structure and / or processing steps closely related to the solution according to the present invention are shown in the drawings, and the steps related to the present invention are omitted. Invent other details that don't really matter.
[0038]The frequency of the debris flow geoacoustic signal varies greatly with the geological composition, so it is necessary to introduce a dynamically ...
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Embodiments of the present invention disclose a multi-channel debris flow geosound acquisition circuit and method, relate to debris flow monitoring technology and can solve the problem of low accuracyof geosound acquisition. A geosound signal conditioning module regulates a received geosound signal. An AD acquisition module uses 24-bit multi-channel simultaneous sampling to provide ultra-low input current, allowing direct connection to sensors, and each input channel has a programmable gain stage. A microprocessor module receives the geosound signal sent by the AD acquisition module, performsgain dynamic setting, digital filtering and frequency screening processing on the collected geosound signal, identifies an effective debris flow geosound signal, dynamically configures the cutoff frequency of a geosound sensor, timely adjusts the gain of AD acquisition module, and sets the filter model of the AD module according to the type of debris flow. This circuit is mainly used for geosoundsignal processing.
Description
technical field [0001] The invention relates to the technical field of mud-rock flow monitoring, in particular to a multi-channel mud-rock flow acoustic processing circuit and method. Background technique [0002] The so-called ground sound of debris flow refers to the debris flow as a vibration source. When the debris flow flows, vibration waves will be generated due to friction, impact and erosion of the trench, and will propagate outward through the surface. Summarizing the previous studies, it is known that the geoacoustic signal of debris flow is often mixed with strong background noise and attenuates quickly. It is easy to weaken the signal due to the obstruction of structures, and the frequency range of geoacoustics generated under different geological conditions is different. very big. Usually, the geoacoustic frequency of gravel-type debris flow is mainly between 10 and 300 Hz; that of mud-flow type debris flow is between 5 and 20 Hz; and that of general-type debri...
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IPC IPC(8): G01H1/12
Inventor 颜芳孙芳万顺平王珂孙景雷梁涛
Owner 航天科工惯性技术有限公司