Title:
ULTRASONIC SENSOR
Document Type and Number:
WIPO Patent Application WO/2021/256189
Kind Code:
A1
Abstract:
An ultrasonic sensor comprises a microphone case (4), a transmission unit (5), and an excitation unit (51). The microphone case has a side plate part (41) and a top plate part (42). The side plate part is formed in a tubular shape surrounding a center axis (DA). The top plate part is a plate-shaped part having a thickness direction in an axial direction parallel to the center axis, being provided so as to close one end part of the side plate part in the axial direction, and being formed so as to be able to transmit transmission waves, which are ultrasonic waves. The transmission unit that transmits the transmission waves is contained in the microphone case in a state separated from the top plate part. The excitation unit excites the microphone case so as to be able to remove foreign matter that has adhered to the top plate part.
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Inventors:
KOJIMA EIJI (JP)
KATO TETSUYA (JP)
MIZUTANI ATSUSHI (JP)
ISHII ITARU (JP)
TANEMURA TOMOKI (JP)
KAMIYA TATSUYA (JP)
KATO TETSUYA (JP)
MIZUTANI ATSUSHI (JP)
ISHII ITARU (JP)
TANEMURA TOMOKI (JP)
KAMIYA TATSUYA (JP)
Application Number:
PCT/JP2021/019776
Publication Date:
December 23, 2021
Filing Date:
May 25, 2021
Export Citation:
Assignee:
DENSO CORP (JP)
International Classes:
H04R1/02; B60S1/56; G01S7/521; G01S15/931
Domestic Patent References:
| WO2010005130A1 | 2010-01-14 |
Foreign References:
| JPH05157849A | 1993-06-25 | |||
| JP2019140672A | 2019-08-22 | |||
| JP2000023296A | 2000-01-21 | |||
| JPS6327784A | 1988-02-05 | |||
| JP2002044784A | 2002-02-08 | |||
| JP2012217036A | 2012-11-08 |
Attorney, Agent or Firm:
YOU-I PATENT FIRM (JP)
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