Method for detecting a vehicle type, a vehicle speed and width of a detecting area by a vehicle radar sensor
AssigneesChien Cheng Technology Co., Ltd., Ming-Te Tseng
InventorMing-Te Tseng
Life of this patent
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Abstract
A method for detecting a vehicle type, a vehicle speed and width of a detecting area by a vehicle radar sensor is disclosed. A radio wave is transmitted to a tracked vehicle. Subsequently, the reflective radio wave from the vehicle is received. The Doppler frequency versus time distribution is generated from the reflective radio wave. Because the reflective radio wave is influenced by the Doppler Effect, a parallelogram or a shape close to a parallelogram of a consecutive motion diagram is shown in the Doppler frequency versus time distribution of the vehicle. According to the consecutive motion diagram, certain information, such as the length and speed of the tracked vehicle and the width of the detecting area, can be acquired.
Claims10
A method for detecting a vehicle type, a vehicle speed and width of a detecting area by a vehicle radar sensor, comprising steps of:
- sending radio waves into said detecting area upon at least one road;
- generating at least one reflective signal from said detecting area while a vehicle passing through said detecting area of said road;
- generating a Doppler frequency versus time distribution based on said reflective signal, and said distribution is a consecutive motion diagram, said consecutive motion diagram is a parallelogram;
- and
- computing said vehicle speed, said vehicle length and said width of said detecting area according to said consecutive motion diagram.
Dependencies are inferred from the claim text.