Ultrasonic sensor
US11635504B2 · kind B2 · utility
1Cited by
2References
13Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 1, 2020 |
| Grant date | Apr 25, 2023 |
| Priority date | — |
| Expiry date | Dec 1, 2040 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG10K9/122
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An ultrasonic sensor includes: a first electrode that is provided in an ultrasonic microphone including a vibration element having a function of performing conversion between mechanical vibration and an electrical signal; a second electrode that is provided at a position different from the first electrode in an in-plane direction intersecting a directional axis of the ultrasonic microphone; and a detection section that is provided to detect the presence or absence of attached matter attached to the ultrasonic sensor on the basis of a change in capacitance between the first electrode and the second electrode.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.