Title:
【発明の名称】多変位検出装置
Document Type and Number:
Japanese Patent JP2911664
Kind Code:
B2
Abstract:
Multiple output signals of rotary displacement sensors of a machine tool spindle are processed by a multi-displacement detector to detect a displacement which is different from a radial displacement in a moving direction. This results in a reduced number of displacement sensors. The multi-displacement detector includes: 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 device for receiving the output signals of the plurality of sensors and for outputting signals indicative of a displacement in the moving direction and another at least one displacement of the moving section.
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Inventors:
HAYASHI KOICHI
Application Number:
JP27317691A
Publication Date:
June 23, 1999
Filing Date:
September 25, 1991
Export Citation:
Assignee:
OOKUMA KK
International Classes:
G01B7/00; G01B7/30; G01B7/312; G01B21/00; G01B21/22; G01D5/14; G01D5/16; G01D5/20; G01D5/245; (IPC1-7): G01B7/30; G01B7/00
Domestic Patent References:
| JP36508U |
Attorney, Agent or Firm:
Azusa Yuzo