DUAL TYPE ULTRASONIC SENSOR FOR ADJUSTING FOCAL LENGTH

摘要

PURPOSE: A divided ultrasonic sensor capable of adjusting focus depth is provided to control the sensitivity of a depth direction by adjusting the focus depth of a beam by geometrically bonding a plurality of delay members to the lower part of a piezoelectric vibrator. CONSTITUTION: A divided ultrasonic sensor capable of adjusting focus depth comprises an acoustic sound division plane(20), a piezoelectric vibrator(50), a transmit delay member(11) and a delay member. The acoustic sound division plane is formed perpendicularly to the center. The piezoelectric vibrator comprises a transmitter(51) and a plurality of receivers. The transmitter is formed at one side of the acoustic sound division plane to slope. The receivers are formed at the other side of the acoustic sound division plane to slope. The transmit delay member is formed at the lower part of the transmitter. The delay member comprises the receive delay member(12) formed at the lower part of the receiver. The receive delay member comprises a first transmit delay member and a second transmit delay member.