Ultrasonic sensor and control method therefor
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United States of America Patent
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Issued Date -
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app pub date -
Oct 2, 2017
filing date -
Apr 13, 2015
priority date (Note) -
Published
status (Latency Note)
Importance
Abstract
An ultrasonic sensor includes a piezoelectric body including a transmission region for an ultrasonic wave and a reception region for a reflected wave of the ultrasonic wave, a common electrode in the transmission region and the reception region, a transmission electrode in the transmission region, a reception electrode in the reception region; and a semiconductor element that is electrically connected to the transmission electrode and the reception electrode and switches an electrical path between a conductive state and a non-conductive state. The semiconductor element puts the path into the conductive state after application of the alternating-current voltage is stopped. Thus, a reverberation signal, output from the reception region in accordance with a reverberant vibration of the ultrasonic wave, is fed back to the transmission electrode.
First Claim
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International Classification(s)
- 2017 Application Filing Year
- G01H Class
- 333 Applications Filed
- 241 Patents Issued To-Date
- 72.38 % Issued To-Date
Cited Art Landscape
Patent Citation Ranking
- 0 Citation Count
- G01H Class
- 0 % this patent is cited more than
- 5 Age
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