Road central isolation belt detection method based on automobile anti-collision radar

Abstract

The invention discloses a road central isolation belt detection method based on an automobile anti-collision radar. The detection method comprising the following implementation steps of: (1) transmitting a signal; (2) receiving an echo signal; (3) generating an intermediate frequency signal; (4) processing a two-dimensional signal; (5) detecting two-dimensional constant false alarm; (6) determining the position and speed of a moving target vehicle; (7) detecting one-dimensional constant false alarm; (8) determining the positions of a static target vehicle and a central isolation belt; (9) comparing the position relation between the target vehicle and the central isolation belt; and (10) conducting analysis processing on anti-collision early warning. The road central isolation belt detection method not only can well detect the position and speed of the moving target vehicle, but also can well detect the positions of the static target vehicle and the road central isolation belt so as to identify the vehicles arriving at and departing from a lane, gives consideration to the moving target residual information in detection results and false-alarm information in an early warning system, has good real-time property and high detection precision, and can well assist a driver so as to ensure the driving safety, prevent automobile collision. The road central isolation belt detection method can be applied in the fields such as automobile anti-collision, navigation, automatic driving and the like in an expressway environment.

Description

technical field [0001] The invention belongs to the technical field of communication, and further relates to a method for detecting a road median strip based on an automobile anti-collision radar in the technical field of radar signal processing. The invention is integrated into the traditional automobile anti-collision radar system, and can better assist the driver on the expressway with the central isolation belt, ensure driving safety and prevent automobile collision. Background technique [0002] In the research on the early warning method of automobile anti-collision radar, the common automobile anti-collision radar uses the echo signal and the transmitted signal for coherent mixing to obtain the intermediate frequency signal containing target information, and then performs spectrum analysis on the intermediate frequency signal to obtain the target distance, Speed ​​and azimuth, for simple early warning analysis, but the disadvantage of this method is that it cannot det...

AI Technical Summary

Problems solved by technology

This method uses LFMCW radar two-dimensional signal processing method and two-dimensional constant false alarm detection method to detect and identify moving target vehicles and stationary large target angle reflectors in complex detection backgrounds, and can detect motion submerged in one-dimensional distance spectrum target, which reduces the influence of complex detection background on moving target detection, but the disadvantage of this method is that it only detects large stationary targets, and does not detect and identify continuous stationary targets in the road environment, that is, the central isolation zone. This method is applied to the anti-collision radar system, which cannot completely detect the targets existing in the road environment, resulting in a high false alarm rate in the early warning system

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