Absolute measurement scale system

Details Absolute measurement scale system Absolute measurement scale system

1993-06-25

1994-08-02

Cuchlinski, Jr., William A.

Geometrical instruments

Distance measuring

Scale reading position sensor

G01B 302

Patent

active

053333900

ABSTRACT:
A scale system for absolute measurement includes at least one scale (1') which extends along a measuring length, and at least one measuring slide which is movable in relation to the scale. The system includes a fine sensor which functions to measure the absolute values within each of the intervals lying along the scale (1'), and further includes a rough sensor which functions to measure the absolute values with regard to the interval in which the fine sensor is located at that time. The scale system further includes at least one rough scale (2', 3') whose scale electrodes (2a, b, 3a, b) define a predetermined angle to the direction in which a measuring slide is moved along the scale, wherein the measuring electrodes of the measuring slide also define a preferably corresponding angle (.alpha.) with the direction of slide movement, whereby a determined displacement of the slide in the slide movement direction will be corresponded by a determined relative movement between the measuring electrodes of the measuring slide and the scale electrodes of the rough scale in a direction perpendicular to the extension of the scale electrodes, this direction defining a predetermined angle with the aforesaid direction of slide movement.

REFERENCES:
patent: 4403859 (1983-09-01), Ernst
patent: 4586260 (1986-05-01), Baxter et al.
patent: 4991125 (1991-02-01), Ichikawa
patent: 5007177 (1991-04-01), Rieder et al.
patent: 5062214 (1991-11-01), Gustafsson et al.
patent: 5225830 (1993-07-01), Andermo et al.
patent: 5233407 (1993-08-01), Ogata

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