IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
UP-0905524
(2007-10-02)
|
등록번호 |
US-7726192
(2010-06-22)
|
우선권정보 |
JP-2006-273063(2006-10-04) |
발명자
/ 주소 |
|
출원인 / 주소 |
|
대리인 / 주소 |
|
인용정보 |
피인용 횟수 :
3 인용 특허 :
15 |
초록
▼
An ultrasonic sensor attached to a certain object, includes an ultrasonic detecting element, an acoustic matching member, and a reflection limiting member. The ultrasonic detecting element detects an ultrasonic wave. The acoustic matching member has a receiving surface that is adapted on a side of t
An ultrasonic sensor attached to a certain object, includes an ultrasonic detecting element, an acoustic matching member, and a reflection limiting member. The ultrasonic detecting element detects an ultrasonic wave. The acoustic matching member has a receiving surface that is adapted on a side of the certain object to face toward the detected body. The reflection limiting member is disposed to a side portion of the acoustic matching member between the receiving surface and an opposing surface of the acoustic matching member. The reflection limiting member limits the ultrasonic wave, which transmits inside the acoustic matching member, from being reflected by the side portion.
대표청구항
▼
What is claimed is: 1. An ultrasonic sensor attached to a certain object for sensing an ultrasonic wave that is reflected by a detected body, the sensor comprising: an acoustic matching member that has a receiving surface that is adapted on a side of the certain object to face toward the detected b
What is claimed is: 1. An ultrasonic sensor attached to a certain object for sensing an ultrasonic wave that is reflected by a detected body, the sensor comprising: an acoustic matching member that has a receiving surface that is adapted on a side of the certain object to face toward the detected body, the receiving surface receiving the ultrasonic wave reflected by the detected body, the acoustic matching member transmitting the ultrasonic wave received by the receiving surface and being adapted such that a standing wave is generated inside of the acoustic matching member due to the ultrasonic wave received by the receiving surface; an ultrasonic detecting element that is attached to an opposing surface of the acoustic matching member opposite the receiving surface, the ultrasonic detecting element detecting the ultrasonic wave that is transmitted by the acoustic matching member, the acoustic matching member being made of a material having an acoustic impedance larger that that of air and smaller than that of the ultrasonic detecting element; and a reflection limiting member that is disposed to a side portion of the acoustic matching member between the receiving surface and the opposing surface, the reflection limiting member limiting the ultrasonic wave, which is transmitted inside the acoustic matching member, from being reflected by the side portion. 2. The ultrasonic sensor according to claim 1, wherein the reflection limiting member is made of a material having the acoustic impedance lower than that of the acoustic matching member. 3. The ultrasonic sensor according to claim 1, wherein the reflection limiting member is made of a material having a degree of elasticity smaller than that of the acoustic matching member. 4. The ultrasonic sensor according to claim 1, wherein the reflection limiting member is made of a silicone rubber. 5. The ultrasonic sensor according to claim 1, wherein the reflection limiting member is provided in a vicinity of the opposing surface. 6. The ultrasonic sensor according to claim 1, wherein the reflection limiting member has at least one of a projection portion and a recess portion on an outer surface thereof such that the ultrasonic wave, that is transmitted from the side portion to an inside of the reflection limiting member is cancelled inside the reflection limiting member. 7. The ultrasonic sensor according to claim 1, the sensor further comprising an oscillation damping member that is disposed between an attachment portion and the acoustic matching member, the attachment portion being adapted for attaching the ultrasonic sensor to the certain object, the oscillation damping member damping transmission of oscillation from the certain object to the acoustic matching member. 8. The ultrasonic sensor according to claim 7, wherein the reflection limiting member is provided integrally with the oscillation damping member by using a common material, of which the oscillation damping member is made. 9. The ultrasonic sensor according to claim 1, wherein: the acoustic matching member is one of a plurality of acoustic matching members; the ultrasonic detecting element is one of a plurality of ultrasonic detecting elements for making a pair with a corresponding one of the plurality of acoustic matching members; a plurality of pairs of the acoustic matching member and the ultrasonic detecting element is arranged in an array; and the reflection limiting member is disposed between each of the acoustic matching members. 10. The ultrasonic sensor according to claim 1, wherein the certain object is a vehicle. 11. The ultrasonic sensor according to claim 10, wherein the attachment portion is a case. 12. The ultrasonic sensor according to claim 11, wherein the case is one of a head lamp cover, a rear lamp cover, a turn signal cover, a back lamp cover, a door mirror, and a bumper of the vehicle. 13. The ultrasonic sensor according to claim 11, wherein the case is attached to one of a head lamp cover, a rear lamp cover, a turn signal cover, a back lamp cover, a door mirror, and a bumper of the vehicle. 14. The ultrasonic sensor according to claim 11, wherein: the reflection limiting member is provided to part of the acoustic matching members, the part of the acoustic matching members projecting from case. 15. The ultrasonic sensor according to claim 14, wherein the reflection limiting member is provided only to the part of the acoustic matching members. 16. The ultrasonic sensor according to claim 1, wherein: the reflection limiting member has an end surface on a side of the reflection limiting member toward the ultrasonic detecting element; and the end surface of the reflection limiting member is flush with the opposing surface of the acoustic matching members.
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