Rain detection device, garden appliance having the rain detection device, and method for sensing rain drops on a surface by means of a rain detection device
US12158441B2 · kind B2 · utility
0Cited by
2References
12Claims
0Family size
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Key dates
| Filing date | Apr 23, 2021 |
| Grant date | Dec 3, 2024 |
| Priority date | — |
| Expiry date | Aug 20, 2041 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03K2217/960745
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A rain detection device for sensing rain drops on a surface includes at least one sensor unit and at least one evaluation unit. The sensor unit includes at least one capacitive sensor element. The sensor element is configured such that a capacitance characteristic of the sensor element changes based on an object contacting the surface. The evaluation unit is configured to detect rain drops on the surface based on a differential signal of the sensor element. The evaluation unit is configured to detect a rain drop on the surface based on a symmetry characteristic of the differential signal with respect to a zero point.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.