OBSTACLE DETECTION DEVICE AND ULTRASONIC SENSOR ADJUSTMENT METHOD

摘要

PROBLEM TO BE SOLVED: To provide an obstacle detection device and an ultrasonic sensor adjustment method for acquiring the sensitivity adjustment value of an ultrasonic sensor that corresponds to the current state of an outside air in the periphery of a vehicle.SOLUTION: The obstacle detection device calculates an adjustment value with which the sensitivity of the ultrasonic sensor 10 is adjusted, on the basis of the maximum amplitude value of a received signal when an ultrasonic wave transmitted by an ultrasonic sensor 10 is directly received and the initial value of a previously acquired maximum amplitude value. The ultrasonic sensor 10 has an ultrasonic sensor 11 for adjustment that directly receives a transmitted ultrasonic wave, and an ultrasonic sensor 12 for obstacle detection that receives a reflected ultrasonic wave when the transmitted ultrasonic wave is reflected by an obstacle. A microcontroller 23 adjusts the ultrasonic sensor 12 for obstacle detection using the adjustment value calculated on the basis of the ultrasonic wave transmitted and received by the ultrasonic sensor 11 for adjustment.SELECTED DRAWING: Figure 1