Ultrasonic sensor with piezoelectric elements and vibration isolator
US8009518B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Dec 23, 2008 |
| Grant date | Aug 30, 2011 |
| Priority date | — |
| Expiry date | Feb 8, 2030 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01S15/931
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.