Pressure sensitive transducer assembly and control method for a system including such an assembly
US8813579B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 29, 2011 |
| Grant date | Aug 26, 2014 |
| Priority date | — |
| Expiry date | Aug 24, 2031 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01L25/00
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Pressure sensitive transducer assembly that includes a force sensing resistor. The force sensing resistor includes: first and second substrates; at least a first and a second electrically conductive traces on the inner surface of the first substrate including interdigitated fingers defining a sensitive area; and a resistive layer facing the sensitive area. The force sensing resistor includes an auxiliary trace on the inner surface of the first substrate connecting the first trace to the second trace through a constant resistance that is not dependent on the force applied to the substrates. The constant resistance being of a value largely greater than the value of the variable resistance which can be measured indirectly between the fingers when an external force is applied to the substrates. A system and a control method are also proposed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.