Method and device for reducing acceleration signal measurement noise

A signal measurement and acceleration technology, applied in the computer field, can solve problems such as jitter and mutation, and achieve the effect of improving accuracy

Inactive Publication Date: 2019-08-23
UNIV OF SHANGHAI FOR SCI & TECH
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Problems solved by technology

However, the hard threshold denoising method is prone to mutations ...

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  • Method and device for reducing acceleration signal measurement noise

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[0051] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0052] In a typical configuration of the present application, the terminal, the device serving the network and the trusted party all include one or more processors (CPU), input / output interface, network interface and memory.

[0053] Memory may include non-permanent storage in computer readable media, in the form of random access memory (RAM) and / or nonvolatile memory such as read only memory (ROM) or flash RAM. Memory is an example of computer readable media.

[0054] Computer-readable media, including both permanent and non-permanent, removable and non-removable media, can be implemented by any method or technology for storage of information. Information may be computer readable instructions, data structures, modules of a program, or other data. Examples of computer storage media include, but are not limited to, phase change memory (PRAM), static random a...

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Abstract

The invention aims to provide a method and device for reducing acceleration signal measurement noise, wherein a wavelet decomposition technology is mainly used for performing soft threshold noise reduction processing on two paths of acceleration signals respectively, two paths of wavelet reconstructed signals are compared layer by layer, and finally an effective acceleration signal is obtained, sothat the time domain and frequency domain characteristics of the acceleration signals and the relevant information of signal mutation can be reflected at the same time; more importantly, two acceleration sensors are adopted for measurement, the noise of the two acceleration sensors may be different, but the fluctuation characteristics of the effective signals of the two acceleration sensors are basically consistent, extraction can be carried out after wavelet processing so as to obtain a needed signal, if the difference between the two noise reduction signals is large, the problems existing in the acceleration signal noise reduction processing procedure need to be corrected, such as selection of a threshold value; thus, the accuracy of signal noise reduction processing can also be improved.

Description

technical field [0001] The invention relates to the field of computers, in particular to a method and equipment for reducing acceleration signal measurement noise. Background technique [0002] Acceleration is an important physical quantity that characterizes the motion of an object, and there are many measurement methods available. However, due to the existence of acceleration measurement environment, hardware structure and other factors, the actual measurement signal often carries various noises, resulting in the signal cannot be used directly. Therefore, it is necessary to find a feasible method to process it and obtain the required signal. . [0003] Wavelet transform is a time-scale analysis method (instant-frequency analysis method) of a signal. It can obtain the time information of the signal by shifting the mother wavelet, and obtain the frequency characteristics of the signal by scaling the wavelet scale. Therefore, it can simultaneously characterize the time domai...

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Application Information

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IPC IPC(8): G01P15/14G06K9/00G06K9/62
CPCG01P15/14G06F2218/06G06F2218/12G06F18/22
Inventor 杨晖荆志爽
Owner UNIV OF SHANGHAI FOR SCI & TECH
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