Multiplexed radio frequency linear position sensor system
US5150060A · kind A · utility
23Cited by
3References
24Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jul 5, 1991 |
| Grant date | Sep 22, 1992 |
| Priority date | — |
| Expiry date | Jul 5, 2011 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01D21/02
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An apparatus is adapted to detect the linear extensions of a plurality of hydraulic cylinders. Each hydraulic cylinder defines a variable length coaxial resonant cavity. Under the control of a controller, a transmitting section, a receiving section and multiplexers are used to multiplex RF signals to and from the cavity of each cylinder and to determine the resonant frequency of the cavity. The controller determines the linear extension of each cylinder as a function of its resonant frequency.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.