Automobile forward direction anticollision system signal processing method

A technology of anti-collision system and signal processing, applied in the field of signal processing

Active Publication Date: 2016-03-30
DALIAN ROILAND SCI & TECH CO LTD
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  • Abstract
  • Description
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AI Technical Summary

Problems solved by technology

[0002] In recent years, with the development of expressways and the continuous increase of vehicle speed, vicious traffic accidents have occurred frequently, most of which are caused by human factors and cannot be effectively overcome by regulating driver behavior

Method used

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  • Automobile forward direction anticollision system signal processing method
  • Automobile forward direction anticollision system signal processing method
  • Automobile forward direction anticollision system signal processing method

Examples

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Embodiment 1

[0035] A signal processing method for an automobile forward collision avoidance system, within each frequency sweep period, the upper and lower frequency sweep IQ data of each channel are respectively processed as follows:

[0036] S1: Perform N-point fast Fourier transform FFT on IQ data;

[0037] S2: Perform adaptive threshold detection on the transformed complex data, and output the position of the threshold crossing point;

[0038] S3: Use the interval of one point before and after the position of the threshold point as the transformation interval, and perform the chirp-z transformation of M points;

[0039] S4: Perform a peak search on the data after the chirp-z transformation, and output the position of the peak point;

[0040] S5: Calculate the difference frequency and phase according to the peak point position:

[0041] Calculate the modulus of the M values ​​output by the upper and lower sweep bands in channels I and II respectively, and find the maximum value posit...

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Abstract

The invention discloses an automobile forward direction anticollision system signal processing method. In each frequency sweep cycle, the following processes which are performed on upper sweep frequency IQ data and lower sweep frequency IQ data of each channel comprise steps of performing fast Fourier transform FFT on N points of IQ data, performing adaptive threshold detection on transformed plural module value data after transmission, outputting an over-threshold point position, taking an interval between two points as a transformation interval, wherein one point is positioned before the threshold point position and the other one is positioned after the threshold point position, performing chirp-z transformation on M points, performing peak value searching on the data after chirp-z transformation, outputting a peak value point position, calculating a difference frequency and a phase according to the peak value point, outputting an object distance, relative radial speed and an azimuth according to the difference frequency and the phase output distance. The invention enables the system to respond fast through processing and optimizing the signal, is good in practicability and faster.

Description

technical field [0001] The invention belongs to the field of signal processing, in particular to a signal processing method for a forward collision avoidance system of an automobile. Background technique [0002] In recent years, with the development of highways and the continuous increase of vehicle speed, vicious traffic accidents have occurred frequently, most of which are caused by human factors and cannot be effectively overcome by regulating driver behavior. Therefore, the development and research of automobile anti-collision alarm system has become the fundamental way to solve the problem of highway traffic safety. Active safety driving auxiliary devices such as the active anti-collision control system of automobiles can significantly reduce the driver's burden and judgment errors, and will play an important role in improving traffic safety, reducing the incidence of vicious traffic accidents, and reducing the loss of life and property. [0003] In the application of...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S7/41G01S13/93
CPCG01S7/41G01S13/931
Inventor 田雨农王鑫照周秀田史文虎
Owner DALIAN ROILAND SCI & TECH CO LTD
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