发明名称 |
Ultrasonic sensor with piezoelectric elements and vibration isolator |
摘要 |
An ultrasonic sensor includes a transmitting device, receiving devices arranged in an array, and a circuit device. One receiving device is configured as a reference receiving device. The circuit device includes a reference signal generator and first and second synchronous detectors. The reference signal generator generates a reference signal by using a received signal of the reference receiving device. The first synchronous detector performs synchronous detection of a received signal of one of the receiving devices based on the reference signal to detect a distance to an object. The second synchronous detector performs synchronous detection of received signals of the receiving devices except the reference receiving device based on the reference signal to detect a direction of the object.
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申请公布号 |
US8009518(B2) |
申请公布日期 |
2011.08.30 |
申请号 |
US20080318187 |
申请日期 |
2008.12.23 |
申请人 |
DENSO CORPORATION;NIPPON SOKEN, INC. |
发明人 |
OKUDA YASUYUKI;KOJIMA KIYONARI;ODA TERUO;YAMANAKA AKITOSHI |
分类号 |
H04R17/00 |
主分类号 |
H04R17/00 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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