Method of measuring direction of mechanical vibrations

Details Method of measuring direction of mechanical vibrations Method of measuring direction of mechanical vibrations

1986-12-16

1989-05-02

Levy, Stewart J.

Measuring and testing

Vibration

Sensing apparatus

G01H 900

Patent

active

048256986

ABSTRACT:
A method of measuring the direction of mechanical vibrations, in which a plurality of points are marked on the surface of a vibrating object along the arc of a circle of a given radius at a constant pitch selected from a range of 1.2 to 1.8 of the amplitude of mechanical vibrations, forming a circular scale and while moving together with the vibrating object making up, depending on the shape of a trajectory of mechanical vibrations, stroboscopically still equal segments of a straight line or patterns. A group of straight line adjacent segments disposed at a minimum distance in a radial direction or patterns having a maximum overlapping and a radially arranged axis of symmetry is visually defined. An ordinal number is determined of one or two straight line segments or of one or two patterns through which the axis of symmetry passes, and the direction of mechanical vibrations is measured on the circular scale by an angle corresponding to this ordinal number.

REFERENCES:
patent: 1673949 (1928-06-01), Rathbone
patent: 2261838 (1941-11-01), Allendorff
patent: 4364275 (1982-12-01), Lamar

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