Title:
ULTRASONIC SENSOR
Document Type and Number:
WIPO Patent Application WO/2011/021086
Kind Code:
A1
Abstract:
Disclosed is an ultrasonic sensor which is provided in a bumper (31) of a vehicle (3) and used in a vehicle obstacle detector (1) that detects the presence of an obstacle within a detection area by transmitting and receiving ultrasonic waves, the ultrasonic sensor being provided with a piezoelectric element (21) which transmits and receives the ultrasonic waves by vibration of a piezoelectric substrate, and a plate-shaped acoustic matching layer (22) to one surface (22a) of which the piezoelectric element (21) is joined. The ultrasonic sensor is inserted in a mounting hole (31a) bored in the bumper (31), and another surface (22b) of the acoustic matching layer (22) is configured by an inclined surface inclined with respect to the one surface (22a) joined to the piezoelectric element (21) and is formed parallel to the outer surface of the bumper (31).
Inventors:
URASE HIROSHI (JP)
NAGANO YASUSI (JP)
AZUMA NAOYA (JP)
NAGANO YASUSI (JP)
AZUMA NAOYA (JP)
Application Number:
PCT/IB2010/002019
Publication Date:
February 24, 2011
Filing Date:
August 17, 2010
Export Citation:
Assignee:
PANASONIC ELEC WORKS CO LTD (JP)
URASE HIROSHI (JP)
NAGANO YASUSI (JP)
AZUMA NAOYA (JP)
URASE HIROSHI (JP)
NAGANO YASUSI (JP)
AZUMA NAOYA (JP)
International Classes:
G01S7/521; B60R16/02; B60R21/00; H04R17/00; G01S15/931
Foreign References:
| JPH1070784A | 1998-03-10 | |||
| JPS6485000A | 1989-03-30 | |||
| JPH0865795A | 1996-03-08 | |||
| JPH04245898A | 1992-09-02 |
Attorney, Agent or Firm:
JANG, Seong Ku (Trust Tower275-7 Yangjae-dong,Seocho-gu, Seoul 137-130, KR)
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