System for remotely reading an analog meter

Details System for remotely reading an analog meter System for remotely reading an analog meter

1989-10-16

1991-05-07

Evans, F. L.

Optics: measuring and testing

By polarized light examination

With light attenuation

358107, G01B 1114, H04N 718

Patent

active

050131540

ABSTRACT:
A system is disclosed for remotely reading out an analog meter having a movable pointer overlying and being mobile over a stationary scale. The pointer is characterized by a first optical reflectivity (R1), and the scale is characterized by a second optical reflectivity (R2). The system comprises an image generator and a detector. The image generator generates an image signal representative of the optical reflectivity of a composite image of the pointer overlying the scale. The detector processes the image signal to generate a pointer position signal representative of the relative position of the pointer with respect to the scale.

REFERENCES:
patent: 4492472 (1985-01-01), Asano et al.
patent: 4581762 (1986-04-01), Lapidus et al.
patent: 4680704 (1987-07-01), Konicek et al.
Build the Micro D-Cam Solid State Video Camera, Ciarcia, Byte publications, Sep. 1983, pp. 21-33, Part I; Oct. 1983, pp. 67-86, Part II.

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