Motion detection and measurement

Details Motion detection and measurement Motion detection and measurement

1976-07-26

1978-05-02

Ciarlante, Anthony V.

Measuring and testing

Vibration

Sensing apparatus

G01B 902, G01N 2122

Patent

active

040868087

ABSTRACT:
Methods and apparatus are disclosed for measuring and monitoring vibrational or similar motion in mechanical elements. Retroreflectors on the elements are illuminated with monochromatic light, preferably a laser, and the reflected beams form an interference pattern. Shifts in the interference fringes correspond to motion which changes the relative length of the paths of reflected light and these shifts are counted or analyzed to monitor such motion. Both micro and macro motion can be monitored.

REFERENCES:
patent: 3316759 (1967-05-01), Rehder
patent: 3355934 (1967-12-01), Foster
patent: 3782176 (1974-01-01), Jacobs
patent: 3879988 (1975-04-01), Jacobs

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