Method for reducing error in doppler radar type vehicle ground speed detector

Abstract

Abstract PURPOSE:To enable the ground speed of a vehicle to be detected accurately by eliminating error components due to the vibrations and the yawing of the vehicle from the detected speed of the Doppler radar. CONSTITUTION:The doppler radar 2 is disposed with an attachment angle thetato the vehicle and a rate gyro 3 is mounted to measure an angular velocity Z' around the center of gravity. The radar 2 detects the speed Vd which is applied through a divider 4 to an adder 5. The gyro 3 detects the angular velocity Z' which is appled through a multiplier 6 to the adder 5. The adder 5 adds the speed from the divider 4 and the computed value from the multiplier 6 and transmits the sum to a LPF 7. The LPF 7 filters the sum from the adder 5 to remove high frequency components to output computed values. In such a manner, the ground speed of the vehicle at an optional point can be found.

Inventors

• 👤 Ichiro Nakano
• 👤 一郎 中野

Bibliographic Details