Title:
ULTRASONIC DEVICE
Document Type and Number:
WIPO Patent Application WO/2018/139194
Kind Code:
A1
Abstract:
An ultrasonic device (100) is provided with a transmitting circuit (110), an ultrasonic transducer (120), a receiving circuit (140), and a capacity measuring circuit (150). The ultrasonic transducer is a terminal-type ultrasonic transducer having a transmitting electrode (121), a receiving electrode (122), and a common electrode (123). The transmitting circuit outputs a drive signal to the transmitting electrode, and sends an ultrasonic wave from the ultrasonic transducer. The receiving circuit receives a reception signal from the receiving electrode. The capacity measuring circuit is electrically connected to the receiving electrode, and measures the capacitance of the ultrasonic transducer.
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Inventors:
NAKAO MOTOYASU (JP)
WATANABE KOSUKE (JP)
WATANABE KOSUKE (JP)
Application Number:
PCT/JP2018/000271
Publication Date:
August 02, 2018
Filing Date:
January 10, 2018
Export Citation:
Assignee:
MURATA MANUFACTURING CO (JP)
International Classes:
G01S7/526; H04R1/00; H04R3/00; H04R29/00
Domestic Patent References:
| WO2016167003A1 | 2016-10-20 |
Foreign References:
| JPS61270685A | 1986-11-29 | |||
| JP2012049789A | 2012-03-08 | |||
| JPH11150959A | 1999-06-02 | |||
| JPS61270685A | 1986-11-29 | |||
| JP2012217012A | 2012-11-08 |
Other References:
See also references of EP 3575826A4
Attorney, Agent or Firm:
FUKAMI PATENT OFFICE, P.C. (JP)
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