发明名称 |
Ultrasonic device for detecting direction to object |
摘要 |
A ultrasonic device detecting a direction to an object includes: a transmitting element of a ultrasonic wave; first and second receiving elements; a diffraction wave phase detector; an initial phase memory for an initial phase of a diffraction wave; a sound speed detector; a phase correction amount calculator calculating a phase shift caused by a sound speed change and calculating a phase correction amount based on the phase of the diffraction wave, the initial phase and the phase shift; a phase correction element correcting a phase of the reflection wave based on the phase correction amount; and a direction detector for detecting the direction to the object based on a difference between corrected phases of the reflection wave received by the first and second receiving elements, a distance between the first and second receiving elements, and a wavelength of the transmission ultrasonic wave corresponding to a sound speed.
|
申请公布号 |
US2010024557(A1) |
申请公布日期 |
2010.02.04 |
申请号 |
US20090458924 |
申请日期 |
2009.07.28 |
申请人 |
DENSO CORPORATION;NIPPON SOKEN, INC. |
发明人 |
MATSUURA MITSUYASU;ISOGAI TOSHIKI;OKAMOTO AYAKO;ARIYOSHI HIROMI;OKUDA YASUYUKI |
分类号 |
G01N29/00 |
主分类号 |
G01N29/00 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|