A millimeter wave radar based vehicle target speed change measurement method and system

By analyzing LFMCW sawtooth wave signals and fuzzy functions based on millimeter-wave radar, the accuracy and interference problems in measuring vehicle target speed changes were solved, achieving highly sensitive and accurate speed change measurement and improving driving safety.

CN117008130BActive Publication Date: 2026-06-26BEIHANG UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
BEIHANG UNIV
Filing Date
2023-08-04
Publication Date
2026-06-26

AI Technical Summary

Technical Problem

Existing methods for measuring vehicle target speed changes suffer from insufficient accuracy and cross-term interference in non-stationary signal analysis, making it difficult to achieve highly sensitive and accurate speed change measurement, which affects driving safety.

Method used

By employing LFMCW sawtooth wave signals and utilizing the relationship between the mutual ambiguity term in the ambiguity function and the speed change, high-sensitivity and high-precision measurement of vehicle target speed changes can be achieved through signal deskewing and slow-time signal sequence extraction, combined with window function processing.

Benefits of technology

It can operate 24/7 under common weather conditions, providing timely and accurate speed change information, reducing the probability and severity of rear-end collisions, and is suitable for manned/unmanned vehicles.

✦ Generated by Eureka AI based on patent content.

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Abstract

The application discloses a kind of vehicle target speed variation measurement method and system based on millimeter wave radar, it is related to digital signal processing technical field.The method includes: step one: generating LFMCW signal;Step two, signal transmission is carried out by wireless transceiver unit;Step three: obtain intermediate frequency signal;Step four: extract slow time signal sequence;Step five: measure vehicle target speed variation.System includes signal generation unit, wireless transceiver unit, signal dechirp unit, signal correction unit, speed variation measurement unit.The application realizes the high-precision, real-time measurement of the speed variation of preceding vehicle, fuses the speed variation of vehicle in front and other information and decision-making, and further helps driver or automatic driving system to take necessary and reasonable measures, improves driving safety.
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