Multi-displacement detecting apparatus

Details Multi-displacement detecting apparatus Multi-displacement detecting apparatus

1992-09-22

1994-08-16

Wieder, Kenneth A.

Electricity: measuring and testing

Magnetic

Displacement

32420725, 318661, 36416701, G01B 730, G01B 734

Patent

active

053390300

ABSTRACT:
According to the present invention, multiple output signals of rotary displacement sensors are processed to detect a displacement different from a radial displacement in a moving direction. This results in a reduced number of displacement sensors. The present invention is a multi-displacement detecting apparatus, comprising: a moving section whose surface is continuously irregular in the moving direction; a stationary section including a plurality of sensors each outputting a signal that contains an output component whose level is proportional to a sine-wave value of a displacement in the moving direction and has an amplitude modulated in proportion to a variation in the gap from the irregular surface; and an arithmetic logic means for inputting the output signals of a plurality of sensors and outputting a displacement in the moving direction and other at least another displacement of the moving section.

REFERENCES:
patent: 4743786 (1988-05-01), Ichikawa et al.
patent: 5032750 (1991-07-01), Hayashi
patent: 5155696 (1992-10-01), Shibata et al.

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