Ultrasonic direct echo path reduction
US12379477B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 15, 2022 |
| Grant date | Aug 5, 2025 |
| Priority date | — |
| Expiry date | Nov 4, 2043 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG05D2111/20
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A robotic cleaning appliance includes a housing to which is coupled a surface treatment item and a sensor assembly with first and second transducers and an acoustic interface. The first sonic transducer transmits sonic signals through an acoustic interface and out of a first acoustic opening toward a surface beneath the robotic cleaning appliance. The sonic signals reflect from the surface as corresponding returned signals received by the second sonic transducer via a second acoustic opening port of the acoustic interface. A first plurality of annular rings is defined in the external surface around the first acoustic opening port and a second plurality of annular rings is defined in the external surface around the second acoustic opening port. The pluralities of annular rings attenuate direct path echoes from a subset of the transmitted sonic signals which attempt to travel across the external surface to the second acoustic opening port.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.