MULTITRACK MULTILEVEL SENSING SYSTEM
Assignee
Boeing
Filed as: BOEING COMPANY, THE
Filed
Aug 31, 1990
Granted
Aug 17, 1993
Location
MERCER ISLAND WA US
Abstract
An optical sensor in which both analog and digital techniques are employed. The sensor comprises an encoder and a detector. The encoder includes a plurality of tracks extending along a sensing axis. Each track has a property that varies along the sensing axis, such that the property can have one of three or more distinguishable levels. The detector detects the levels of the tracks at a position along the sensing axis, and produces corresponding output signals. The levels vary in a manner such that the output signals encode the position of the encoder with respect to the detector. The levels may vary in steps or continuously. For stepwise variable tracks, preferably only one track changes its level at any given position, and all changes in level occur in single steps. Both optical and electrical implementations are described.
Source: Google Patents
35 USC §181 Secrecy Order
Imposed
Dec 19, 1990
Rescinded
May 6, 1991
Duration
4 months
Inventor
- 1RAYMOND W. HUGGINS
Record Details
- Patent number
- US 5237391
- Application
- 07575588
- Aerospace match
- Yes
- Dataset source
- 35 USC §181 SO records
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