Sensing elements including coupled oscillators and sonar elements using them

摘要

PROBLEM TO BE SOLVED: To provide a sensing element including a coupled vibrating body capable of performing more accurate sensing and a sonar element using the sensing element. SOLUTION: In a sensing element provided with a plurality of vibrating bodies 10 and 20 having a membrane structure, when the plurality of vibrating bodies 10 and 20 are coupled by a coupled spring 30 to electrically drive the vibrating body. , A plurality of vibrating bodies 10 and 20 are vibrated integrally. This makes it possible to vibrate a plurality of vibrating bodies 10 and 20 at the same resonance frequency regardless of an error in processing workmanship or the like. Further, when reception is performed by the plurality of vibrating bodies 10 and 20, the actuators 40 and 50 are driven to release the coupling of the plurality of vibrating bodies 10 and 20 by the coupled spring 30. This makes it possible to generate a phase difference in the vibrations of the plurality of vibrating bodies 10 and 20, and it is possible to measure from which direction the received ultrasonic waves are transmitted. [Selection diagram] Fig. 1