DRIVING DEVICE, SIGNAL PROCESSING DEVICE, ULTRASONIC SENSOR, AND VEHICLE

원문 (중국어)

A driving device includes a transmission wave signal generation circuit configured to generate a transmission wave signal, and a driving circuit configured to drive an ultrasonic oscillation element based on the transmission wave signal. The driving circuit has an initial driving sequence in which the driving circuit generates the transmission wave signal at an initial frequency, a first transition sequence in which the driving circuit generates the transmission wave signal during its transition from the initial frequency to a first frequency, and a second transition sequence in which the driving circuit generates the transmission wave signal during its transition from the first frequency to a second frequency. The initial frequency and the second frequency are closer than the first frequency, to the resonance frequency of the ultrasonic oscillation element. The first transition sequence is allotted a longer time than the time allotted to the second transition sequence.