Patent ID: 7468933

Claim:
A collision detection device for a vehicle, comprising: a first direction signal outputting unit for detecting an intensity of heat ray radiated from a detection object which is near or contacts the vehicle and outputting a first direction signal corresponding to an existence direction of the detection object based on the detected intensity; a sending member which is mounted to the vehicle to send an ultrasonic wave; a second direction signal outputting unit for detecting an ultrasound wave which is sent by the sending member and reflected by a detection object and outputting a second direction signal corresponding to an existence direction of the detection object based on a detection result about the ultrasonic wave; an impact signal outputting unit for detecting an impact on the vehicle and outputting an impact signal which indicates that the impact is applied to the vehicle based on a detection result about the impact; and a control unit which determines that there occurs a collision between the vehicle and a human in the case where the control unit determines that a difference between the first direction signal and the second direction signal is within a first predetermined range and the impact signal is outputted.