Multichannel wireless distributed braking data transmission method for a motor vehicle in defined field

A data transmission method and multi-channel technology, which is applied in the field of multi-channel wireless distributed field vehicle braking data multivariate wavelet noise reduction transmission, can solve the problem of not considering the uncertainty of random noise, etc., to avoid data interference, multi-signal Clean, lightening effect

Active Publication Date: 2018-11-16
温州市特种设备检测研究院
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  • Multichannel wireless distributed braking data transmission method for a motor vehicle in defined field
  • Multichannel wireless distributed braking data transmission method for a motor vehicle in defined field
  • Multichannel wireless distributed braking data transmission method for a motor vehicle in defined field

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[0020] Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that the relative arrangements of components and steps, numerical expressions and numerical values ​​set forth in these embodiments do not limit the scope of the present invention unless specifically stated otherwise.

[0021] The following description of at least one exemplary embodiment is merely illustrative in nature and in no way taken as limiting the invention, its application or uses.

[0022] Techniques and devices known to those of ordinary skill in the relevant art may not be discussed in detail, but where appropriate, such techniques and devices should be considered part of the description.

[0023] In all examples shown and discussed herein, any specific values ​​should be construed as exemplary only, and not as limitations. Therefore, other instances of the exemplary embodiment may have different values.

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Abstract

The invention discloses a multichannel wireless distributed braking data transmission method for a motor vehicle in a defined field, and the method comprises the steps: synthesizing a plurality of physical quantity signals in a process of detecting the braking performances of the motor vehicle in the defined field into one multi-element signal, and carrying out the discrete wavelet transform of the multi-element signal to achieve the noise reduction of the signal of each channel, thereby obtaining a discrete wavelet coefficient of each channel; obtaining covariance matrix estimation of noise through a detail coefficient, and carrying out the SVD (singular value decomposition) of the covariance matrix; determining a threshold value of noise reduction of the signal of each channel; carryingout the inverse wavelet transform of a detail coefficient matrix after threshold noise reduction; employing a matrix low-rank approximation method based on convex optimization for processing to obtaina low-rank structure of a multi-channel signal. The method can reduce the noise impact of each channel, can avoid the data interference between the channels, and guarantees the quality of the signal.Finally, the method achieves the compression of the signal to a certain degree, can reduce the difficulty of data transmission, and can improve the data transmission speed.

Description

technical field [0001] The patent of the present invention relates to the technical field of signal noise reduction of factory vehicles, and more specifically, the patent of the present invention relates to a multi-channel wireless distributed vehicle braking data multivariate wavelet noise reduction transmission method based on convex optimization. Background technique [0002] According to the "Technical Conditions for Motor Vehicle Operation Safety", the braking performance of motor vehicles in the field needs to detect a number of specific task data, including acceleration detection, braking distance, braking speed, pedal force, pedal stroke, handbrake force, body roll angle. Due to the simultaneous detection of multiple physical signals and multiple distributed measuring points, the quality of data transmission and the real-time performance of processing results need to be considered. At the same time, the measurement environment deviates greatly from the ideal environm...

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Application Information

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IPC IPC(8): H04B15/00G07C5/00
CPCG07C5/008H04B15/005
Inventor 吴安定吴加福高挺峰金樟民方学宠易灿灿
Owner 温州市特种设备检测研究院
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