Gauge for detecting misalignment

Details Gauge for detecting misalignment Gauge for detecting misalignment

1987-12-23

1990-02-27

Eisenzopf, Reinhard J.

Electricity: measuring and testing

Magnetic

Displacement

32420724, G01B 731

Patent

active

049049410

ABSTRACT:
A displacement gauge or gauge for detecting misalignment (3) employs four magnetic coils (24N, etc.) 90.degree. apart, (each) energized by an oscillator (36N, etc.), to sense the dislocation of a machine part, such as a post (12), near their center. A nominal position of the part (9 or 12) relative to a reference component (6) of the machine is first established. Subsequent displacements are detected and are indicated if they exceed a predetermined threshold magnitude.
Signals from the four coils are combined in such a way that the magnitude of the radius of a displacement of the part (9 or 12) from the nominal position is ascertained approximately, irrespective of the direction of displacement from the reference part (6). The combination signal (at 64) is the greatest of (a) the absolute value of a north/south displacement signal, (b) the absolute value of an east/west displacement signal, and (c) 0.707 multiplied by a combination signal which is the sum of the north/south and east/west absolute value signals. During setup the gauge is self-aligning on the post.

REFERENCES:
patent: 4422041 (1983-12-01), Lienan
patent: 4535624 (1985-08-01), Ginns et al.
patent: 4580097 (1986-04-01), Bartlett
patent: 4639667 (1987-01-01), Andresen
patent: 4639668 (1987-01-01), Petit et al.
patent: 4661773 (1987-04-01), Kawakita et al.
patent: 4663601 (1987-05-01), Troutmann et al.
patent: 4723503 (1988-02-01), Yuda
patent: 4733214 (1988-03-01), Andresen
patent: 4796791 (1988-05-01), Forkel

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