Linear position sensor with equalizing means
US5182979A · kind A · utility
71Cited by
10References
13Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Mar 2, 1992 |
| Grant date | Feb 2, 1993 |
| Priority date | — |
| Expiry date | Mar 2, 2012 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S91/04
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
An apparatus is adapted to detect the linear extension, velocity and acceleration of a hydraulic cylinder. The hydraulic cylinder defines a variable length coaxial resonant cavity. Under the control of a controller, an RF transmitting section and an RF receiving section are used to determine the resonant frequency of the cavity. The receiving section includes an equalizer circuit for compensating for the insertion losses of the hydraulic cylinder. The linear extension of the cylinder is determined as a function of the resonant frequency.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.