CAR-MOUNTED COLLISION-PREVENTION WARNING DEVICE

摘要

PURPOSE:To set the safe distance corresponding to each driver's ability automatically. CONSTITUTION:An antenna part 1 is provided with a transmitting part 2 for transmitting electromagnetic waves and a receiving part 3 for receiving the electromagnetic waves reflected from forward obstacles. The received signals are outputted into a signal processing part 4. In the signal processing part 4, a relative distance R to a preceding vehicle and a relative speed Vr between own vehicle and the preceding vehicle are operated on the basis of the input signal, and the results are outputted into an MCU (control device) 12. A vehicle speed sensor 6 detects a running speed V1 and outputs the speed into the MCU 12. A brake sensor 8 detects the pushing amount of a brake 7 and outputs a brake signal SB into the MCU 12. The MCU 12 counts the pulse-number of clock pulses CL generated between a risk warning signal SK and the brake signal SB, operates the free running time and operates the safe distance on the basis of the free running time, the running speed V1 and the relative speed Vr. The MCU 12 compares the safe distance and the relative distance R and outputs the risk warning signal SK or an attention warning signal SW.