Title:
ULTRASONIC WAVE TRANSMITTING AND RECEIVING APPARATUS
Document Type and Number:
Japanese Patent JPS5321954
Kind Code:
A
Abstract:
PURPOSE: To provied an ultrasonic wave transmitting and receiving apparatus, in which ultrasonic oscillators for transmitting and receiving ultrasonic waves are provided at both end portions of a conical horn having end openings both in the form of an elongated circle, and a rotary mask formed with an elongated hole is attached in front of the ultrasonic oscillators, respectively, whereby form of detecting area can be varied with rotation of the masks.
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Inventors:
NAKAMURA MASAYUKI
Application Number:
JP9642776A
Publication Date:
February 28, 1978
Filing Date:
August 12, 1976
Export Citation:
Assignee:
MATSUSHITA ELECTRIC WORKS LTD
International Classes:
H04R1/30; G01S7/521; G01S15/04; H04R1/32; H04R17/00; (IPC1-7): B06B1/00; G01S7/52; H04R17/00