Digitized pickoff system
US4464721A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Feb 8, 1982 |
| Grant date | Aug 7, 1984 |
| Priority date | — |
| Expiry date | Feb 8, 2002 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T74/1275
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A digitized pickoff system is provided for sensing displacement of complementary elements of a dual element pickoff assembly in an inertial sensor for use in an inertial navigation system comprising a relaxation oscillator adapted to sequentially select each of the pickoff elements with the reactance of the selected element determining the oscillating frequency thereof, a data converter adapted to measure the oscillating period thereof, and logic means having an output of a digital number which is proportional to the difference of oscillator periods of the two elements of the dual element pickoff assembly and which is a digital representation of the pickoff displacement.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.