VEHICLE COLLISION ALARMING DEVICE AND VEHICLE COLLISION ALARMING SYSTEM

PROBLEM TO BE SOLVED: To provide a vehicle collision alarming device for quickly alarming to a driver of an own vehicle that another vehicle is approaching to the vehicle where visibility is not good or there is a traffic jam. SOLUTION: This vehicle collision alarming device 100 comprises an ultrasonic transmission device 110 and an ultrasonic receiving device 120. The ultrasonic transmission device 110 has a passage area prediction part 113 predicting a passage area, through which its own vehicle passes within a predetermined time using a vehicle speed and a traveling direction of its own vehicle, an ultrasonic output part 115 transmitting ultrasonic waves in the passage area, and an ultrasonic output control part 114 changing a magnitude of the ultrasonic wave according to the vehicle speed of its own vehicle so that the ultrasonic wave reaches in the passage area. The ultrasonic receiving device 120 has an ultrasonic detection part 121 receiving the ultrasonic wave transmitted from the other vehicle, and a collision alarming part 122 for alarming approach of the other vehicle to the driver of its own vehicle when the ultrasonic wave transmitted from the other vehicle is received. COPYRIGHT: (C)2008,JPO&INPIT