Ultrasonic sensor and electronic apparatus
US11225090B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 16, 2019 |
| Grant date | Jan 18, 2022 |
| Priority date | — |
| Expiry date | Jul 8, 2040 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N2291/106
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An ultrasonic sensor includes a first base facing a conveying surface, a transmission section on a first axis tilted relative to the conveying surface and at a far side of the first base for transmitting an ultrasonic wave toward the first axis, and a reception section on the first axis and at a far side of the conveying surface for receiving the ultrasonic wave. The transmission section has a plurality of transmission elements for transmitting the ultrasonic wave arranged to cross the first axis. The first base has a first aperture through which the ultrasonic wave transmitted from the transmission section along the first axis passes. An area of the first aperture is smaller than an area of an ultrasonic wave transmission surface of the transmission section. The transmission section delays driving the transmission elements to converge the ultrasonic wave transmitted from the transmission section toward the first aperture.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.