An ultrasonic sensor including a case having a bottom portion, and a piezoelectric element that is bonded to an inner surface of the bottom portion and performs bending vibration together with the bottom portion. The piezoelectric element includes a piezoelectric layer having a transmission region and a reception region, a common electrode, a transmission electrode opposing the common electrode with the transmission region interposed therebetween, and a reception electrode opposing the common electrode with the reception region interposed therebetween. The transmission region and the reception region are formed at positions adjacent to each other.
Ultrasonic sensor
2019-04-30
Patent
Electronic Resource
English
IPC: | B60B VEHICLE WHEELS , Räder für Fahrzeuge / B06B GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS IN GENERAL , Erzeugen oder Übertragen mechanischer Schwingungen allgemein / G01H MEASUREMENT OF MECHANICAL VIBRATIONS OR ULTRASONIC, SONIC OR INFRASONIC WAVES , Messen von mechanischen Schwingungen oder Ultraschall-, Schall- oder Infraschallwellen |