Method and apparatus for an AGV inertial table having an angular rate sensor and a voltage controlled oscillator
US5539646A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 26, 1993 |
| Grant date | Jul 23, 1996 |
| Priority date | — |
| Expiry date | Oct 26, 2013 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01C21/18
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A low-cost solid state replacement circuit for an inertial platform with the resulting consequence of increased resolution, significantly reduced cost, and improved reliability and accuracy. The invention comprises no moving parts and permits the use of a strap-down angular rate sensor system which has a fixed orientation relative to an AGV on which the circuit is used. The invention creatively emulates encoder signals previously emanating from the inertial table through the use of a voltage controlled oscillator, a direction of turn determining circuit and an encoder emulator. Cabling which exists in current inertial tables does not need to be changed and information format previously used remains unchanged.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.