Probe head for a coordinate measuring machine

Details Probe head for a coordinate measuring machine Probe head for a coordinate measuring machine

2007-10-23

2007-10-23

Smith, R. Alexander (Department: 2859)

Geometrical instruments

Gauge

Having a movable contact probe

C033S503000

Reexamination Certificate

active

11106701

ABSTRACT:
A probe head for a coordinate measuring machine has a stylus resiliently suspended in a housing. A sensor arrangement serves for detecting deflections of the stylus relative to the housing. The sensor arrangement comprises at least one Hall sensor having a magnet and a Hall element arranged in a vicinity to each other. When the stylus is deflected, the magnet is laterally passed by the Hall element in a direction defined from the North Pole to the South Pole of the magnet or vice versa. A Hall voltage of changing polarity can be tapped at the Hall element then. A preferably linear range around the polarity change is processed in order to determine the deflection of the stylus.

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Joe Gilbert et al., “Linear Hall-Effect Sensors”, 1998 Allegro MicroSystems, Inc., pp. 1-12.
1997 Allegro MicroSystems, Inc., “Hall-Effect IC Applications Guide”, pp. 1-36.

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