초록 ▼

An ultrasonic range finder which can effectively suppress the influence of direct transmission waves is provided. An ultrasonic range finder according to the present invention comprises a transmitting ultrasonic sensor, a receiving ultrasonic sensor, and a case which holds both ultrasonic sensors mo

An ultrasonic range finder which can effectively suppress the influence of direct transmission waves is provided. An ultrasonic range finder according to the present invention comprises a transmitting ultrasonic sensor, a receiving ultrasonic sensor, and a case which holds both ultrasonic sensors mounted and separated on the same surface, wherein a foam member fabricated to contain air bubbles is provided between the ultrasonic sensors within the case and the foam member is exposed to the surface of the case. Each of the sections of the transmitting and receiving ultrasonic sensors (which are held within the case) are covered with a second foam member and the matching layer sections of the transmitting and receiving ultrasonic sensors project beyond the surface of the case.

대표청구항 ▼

[ What is claimed is:] [1.] An ultrasonic range finder comprising:a transmitting ultrasonic sensor, a receiving ultrasonic sensor, and a case for holding the ultrasonic sensors;a first foam member fabricated to contain separate air bubbles which is provided between the ultrasonic sensors within the

[ What is claimed is:] [1.] An ultrasonic range finder comprising:a transmitting ultrasonic sensor, a receiving ultrasonic sensor, and a case for holding the ultrasonic sensors;a first foam member fabricated to contain separate air bubbles which is provided between the ultrasonic sensors within the case and has an acoustic impedance different from an acoustic impedance of the case;a first acoustic matching layer for the transmitting sensor and a second acoustic matching layer for the receiving ultrasonic sensor, both acoustic matching layers projecting outward from the surface of the case; anda projecting member including a portion of said first foam member which projects outward from the surface of the case between the ultrasonic sensors and between the first and second acoustic matching layers.