Sensor for measuring a movement characteristic of an object

Details Sensor for measuring a movement characteristic of an object Sensor for measuring a movement characteristic of an object

1996-02-06

1997-07-15

Le, Que

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

25055932, 73 1103, 180282, G01D 534

Patent

active

056486570

ABSTRACT:
A sensor for measuring a movement characteristic of an object has a housing, an emitter emitting electromagnetic radiation, a detector for receiving electromagnetic radiation, a rod having a graduated scale with a plurality of first regions and second regions for reflecting the electromagnetic radiation from the emitter. A plurality of rollers positions the rod within the housing. As the object moves the first and second regions, the emitter and detector reflect different levels of electromagnetic radiation. The detector generates an output voltage corresponding the level of reflected radiation from the scale. The output voltage is then converted into displacement, velocity, or acceleration.

REFERENCES:
patent: 4128761 (1978-12-01), Oehler
patent: 4580894 (1986-04-01), Wojcik
patent: 4770527 (1988-09-01), Park
patent: 4853675 (1989-08-01), Foster
patent: 5029473 (1991-07-01), Jost et al.
patent: 5155307 (1992-10-01), Breed et al.
patent: 5333874 (1994-08-01), Arnold et al.

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