Pressure sensing system and seat cushion having the pressure sensing system
US12083989B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 9, 2018 |
| Grant date | Sep 10, 2024 |
| Priority date | — |
| Expiry date | Jan 13, 2042 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH05K2201/10151
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A pressure sensing system (24), seat cushion (20) incorporating the pressure sensing system, and method of sensing a weight group associated with an occupant of an automotive seat are described. The pressure sensing system includes a layer of an electrically conductive foam (28) and a flexible printed circuit (26) that includes a flexible substrate (26a) and N horizontal sensing wires (26b) and M vertical sensing wires (26c) securely placed on a top surface of the flexible substrate. The horizontal sensing wires intersect with the vertical sensing wires and form N×M intersections. The layer of an electrically conductive foam is placed on top of the N horizontal sensing wires and the M vertical sensing wires. When a pressure is applied to the layer of the electrically conductive foam, each intersection generates in real time an electric flux density value to reflect a degree of a compression caused by the pressure to a corresponding point of the electrically conductive foam.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.