Automotive anti-collision radar multi-target detecting method and system

Abstract

The invention provides an automotive anti-collision radar multi-target detecting method and system. The method comprises the steps of emitting two types of triangular waves with different modulation periods in an alternating mode and acquiring echo data, carrying out windowing processing, carrying out distance dimension FFT and speed dimension FFT, carrying out modulo processing to obtain frequency spectrum of two types of echo waves, carrying out target paring to obtain a spectral line of the same target of the two echo waves, calculating distance and speed of each target, and judging target distance and speed obtained by the two echo waves through a tolerance function to obtain a final target. A radio frequency emitting and receiving part of the system comprises a radar sensor and an intermediate frequency processing module, and a data processing part comprises a modulus, a modulus converting module and a central control processing module FPGA. The FPGA comprises a modulation signal producing sub-module, an echo wave signal acquisition sub-module, an algorithm sub-module and a control sub-module. The modulation waves and corresponding algorithms effectively remove false targets and improve accuracy that multiple moving targets are detected under strong noise. A hardware system is simplified in structure and easy to achieve.

Description

technical field [0001] The invention relates to the technical field of automobile early warning, in particular to an automobile anti-collision radar multi-target detection method and system. Background technique [0002] Traffic accidents have become "the world's number one hazard". How to ensure driving safety and how to reduce the incidence of related traffic accidents has become a topic of concern to the whole society. In this background, the research and development of automobile early warning technology has become a hot spot, among which the research and development of automobile collision avoidance system has very important practical significance and application value. [0003] Automobile anti-collision radar can be realized by ultrasonic, laser, infrared and microwave technologies, but the first three are easily affected by bad weather and environmental factors, and the detection accuracy cannot be guaranteed. Therefore, domestic and foreign experts focus on microwave...

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Problems solved by technology

[0007] The purpose of the present invention is to design a car anti-collision radar multi-target detection for the problems of poor detection ability, poor real-time performance, poor stability and poor multi-target detection ability of the anti-collision radar in the prior art. Method, the radar system periodically transmits two kinds of triangular waves with different modulation periods, receives two

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