Pressure sensor including a resistor commutator for providing unambiguous atmospheric pressure data
US4143335A · kind A · utility
3Cited by
4References
3Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 4, 1977 |
| Grant date | Mar 6, 1979 |
| Priority date | — |
| Expiry date | Oct 4, 1997 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01L9/02
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A pressure transducer such as for use in a radiosonde includes a substrate and a plurality of conductive contacts formed thereon. An arm is movable over the contacts in accordance with the sensed ambient pressure. A group of resistors of different values of resistance are operatively connected to the contacts whereby each contact is characterized by a unique value of resistance. The resistance may be connected as the frequency-determining element of an oscillator, such that each unique value of resistance may be converted to a unique corresponding frequency and upon decoding determine which unique contact is operatively connected.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.