To provide a highly sensitive and highly efficient ultrasonic wave transceiver for attaining stabilization of transmission route of sound and reducing the impact by dust occurrence etc. at porous material during assembly, and to provide a super-sound flow velocity flowmeter used the transceiver.
A sound matching object 5 is formed by a ceramic porous body 6 having a plurality of pores. Moreover, the sound matching object 5 adopts a configuration, where an inhibition layer 8 for controlling penetration of a joining means 4 into the sound matching object 5 is formed beforehand on the sound matching object 5 and a sound film 7 is formed on a face opposite to an adhered face outside of a portion with ceiling at a casing. According to the inhibition layer 8, penetration of the joining means 4 can be suppressed and stabilization of transmission route of sound can be attained. In addition, the sound film 7 and the inhibition layer 8 can reduce chipping and dust occurrence. Thereby, the impact by dust occurrence etc. at the ceramic porous body 6 at the time of assembly can be lessened as much as possible.
COPYRIGHT: (C)2009,JPO&INPIT
Masahiko Ito
Shin Nakano
| JP2002135895A | ||||
| JP2003111195A | ||||
| JP2002262394A |
Daisuke Nagano
Kentaro Fujii