Title:
MULTI-FREQUENCY TRANSDUCER
Document Type and Number:
Japanese Patent JP2002311128
Kind Code:
A
Abstract:
To provide a multi-frequency transducer which provides an optional directivity characteristic irrespective of the frequency.
The transducer comprises a plurality of arrayed rectangular oscillators 1 which oscillate to make a multi-frequency transmission/reception, utilizing a resonance frequency in a fundamental oscillation mode determined by the sizes A, B of a narrow side 1a and a broad side 1b perpendicular to a lengthwise side 1c of each oscillator 1 and resonance frequencies in higher- order oscillation modes. The directional angle θ of the oscillator is controlled by its lengthwise size C set to a value not influencing on the resonance in the fundamental and higher-order oscillation modes.
Inventors:
KAMEI KAZUHIKO
SUETOSHI RYOICHI
YAMAGUCHI TAKEJI
SUETOSHI RYOICHI
YAMAGUCHI TAKEJI
Application Number:
JP2001116207A
Publication Date:
October 23, 2002
Filing Date:
April 13, 2001
Export Citation:
Assignee:
FURUNO ELECTRIC CO
International Classes:
B06B1/06; G01S7/521; H04R1/44; H04R17/10; B06B1/02; G01S15/96; (IPC1-7): G01S7/521; H04R1/44; H04R17/10
Attorney, Agent or Firm:
Okumura Hideyuki
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