Automobile crashproof millimeter wave radar system

An anti-collision radar, automobile technology, applied in radio wave measurement systems, radio wave reflection/re-radiation, utilization of re-radiation and other directions, can solve the problems of large signal processing calculation, long calculation period, difficult to meet the real-time measurement and other problems , to achieve the effect of high frequency modulation linearity and flexible design

Active Publication Date: 2016-10-26
BEIJING HUAHANG RADIO MEASUREMENT & RES INST
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In the process of multi-target recognition in the prior art, the amount of calculation of signal processing is large, the calculation cycle is long, and it is difficult to meet the requirements of real-time measurement

Method used

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  • Automobile crashproof millimeter wave radar system
  • Automobile crashproof millimeter wave radar system
  • Automobile crashproof millimeter wave radar system

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Embodiment Construction

[0036] The technical solutions of the present invention will be further explained and described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0037] The invention adopts linear frequency modulation (LFM) combined with frequency shift keying (FSK) composite modulation continuous wave working system, and realizes radial (distance and speed) and lateral (azimuth) two-dimensional measurement functions.

[0038] In order to realize the functions of distance measurement and speed measurement in a single modulation cycle, the present invention adopts linear frequency modulation (LFM) combined with frequency shift keying (FSK) composite modulation continuous wave working system, such as figure 1 As shown, the radar system alternately transmits A-segment and B-segment sub-pulses outward through the antenna, the frequency of the two signals changes linearly, the modulation slope and modulation bandwidth are the same, and there is only a small f...

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Abstract

The invention discloses an automobile crashproof millimeter wave radar system, comprising an antenna unit, a microwave front end and a signal processing unit, wherein the antenna unit is used for transmitting and receiving signals; the microwave front end is used for generating transmission signals, outputting local oscillator signals through a coupler, and obtaining intermediate frequency echo beating signals in a difference mode; an intermediate frequency conditioning circuit performs gain amplification on mixed intermediate frequency signals through an operational amplifier, and then outputs the mixed intermediate frequency signals to the signal processing unit; the signal processing unit is used for generating frequency scanning control signals and frequency scanning source control parameters, performing sampling and spectral analysis on beating signals inputted by the microwave front end, resolving speed, distance, phase and azimuth, performing communication through a CAN cable, and converting voltage. The radar system has a radial and transverse two-dimensional measurement capacity, and determines the existence of a danger object according to a safety criterion so as to reduce traffic accidents.

Description

technical field [0001] The invention belongs to the field of automobile safety control, and in particular relates to an automobile anti-collision millimeter-wave radar. Background technique [0002] With the continuous development of economy and technology, the construction of high-grade highways, the automobile industry has developed rapidly since its birth in the late nineteenth century, and the types and quantities have also increased exponentially. Causing frequent collision accidents, traffic safety issues have become the main problem to be solved urgently in the world. Automobile anti-collision radar can monitor the road environment in real time, assist the driver to make correct handling in emergency situations, and effectively prevent traffic accidents. [0003] International research on automobile collision avoidance radar began in the 1960s, and has achieved a lot of results so far, mainly concentrated in developed countries such as Europe, the United States, and ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S13/93G01S13/58G01S7/03
Inventor 林莉许高升潘春云闫杨娇
Owner BEIJING HUAHANG RADIO MEASUREMENT & RES INST
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