Patent ID: 9684067
Date: 2017-06-20
CPC Classifications: G01S

Claim:
1. A sound wave sensor for detecting a distance to a target object by transmitting and receiving a sound wave, comprising: a target object determinator configured to determine a presence or absence of the target object and the distance to the target object by receiving, with a preset sensitivity, a reflected wave obtained from the transmitted wave reflected by the target object, and a correction value obtainer configured to obtain a correction value used to correct a sensitivity of the sound wave sensor from a correction value setting device outside the sound wave sensor and configured to correct the sensitivity by using the correction value, wherein the correction value setting device and the sound wave sensor are mounted to a vehicle, and when a speed of the vehicle is kept at or above a reference speed for a reference time or more, the correction value setting device sends the correction value to the correction value obtainer of the sound wave sensor so that the correction value is set in the sound wave sensor.