Capacitive seat occupancy detection and classification system
US10457236B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 24, 2017 |
| Grant date | Oct 29, 2019 |
| Priority date | — |
| Expiry date | Jan 24, 2037 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03K2217/960735
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
A capacitive vehicle seat occupancy detection and classification system includes an impedance measurement circuit and a control and evaluation unit. The impedance measurement circuit is configured for providing periodic electrical measurement signals to a capacitive sensor of N different fundamental frequencies, wherein N is a natural number of at least 3, and to determine a complex impedance from each of determined sense currents in the capacitive sensor. The control and evaluation unit is configured to determine a seat occupancy class for each one of the complex impedances determined at the at least N different fundamental frequencies, and to determine a final seat occupancy class derived by a majority decision among the determined seat occupancy classes.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.