Device for detecting position and load of a moving object

Details Device for detecting position and load of a moving object Device for detecting position and load of a moving object

1995-08-18

1998-01-06

Dougherty, Elizabeth L.

Measuring and testing

Dynamometers

Responsive to torque

73862324, G01L 302

Patent

active

057057559

ABSTRACT:
A device for detecting position and load of a moving object detects with a high degree of precision a position of a window glass of a power window apparatus or the like and load of a motor, and conducts the detection with a simple structure at a low cost. The device for detecting position and load has a pulse plate which rotates together with a motor output shaft. A sliding contact abuts the pulse plate. As the pulse plate rotates, a predetermined pulse is detected, and a rotational position, a rotational direction, and a rotational speed of the motor output shaft can be detected. Accordingly, a position of movement and a load (catching of a foreign object by the window glass or the like) of the motor output shaft, and therefore of the window glass, can be detected accurately at all times without any adverse effects from thrust joggle of the armature or a rubber cushion or the like.

REFERENCES:
patent: 3845479 (1974-10-01), Fabry
patent: 3888116 (1975-06-01), Spinella
patent: 3940979 (1976-03-01), Ward et al.
patent: 4433585 (1984-02-01), Levine
patent: 4627297 (1986-12-01), Akimoto

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