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US 2006/0076949 A1Published application
Induction type displacement detector
AssigneeMitutoyo Corporation
InventorOsamu Kawatoko
Life of this patent
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Abstract
The invention provides an induction type displacement detector capable of achieving an improved resolution and high precision. The induction type displacement detector comprises a scale, and a sensor head movable along a measurement axis. A plurality of flux coupling windings are arranged on the scale along the measurement axis. A receiving winding is arranged on the sensor head, including receiving loops arrayed along the measurement axis.
Claims9
An induction type displacement detector, comprising:
- a scale;
- a sensor head arranged opposite to said scale and movable relative to said scale in a direction along a measurement axis;
- a transmitting member arranged on said sensor head;
- a receiving winding having a plurality of receiving loops arrayed on said sensor head along said measurement axis;
- and
- a plurality of flux coupling members capable of flux coupling to said transmitting member and said receiving winding and arrayed on said scale along said measurement axis,
- wherein adjacent receiving loops configure a pair-loop having a length of λ along said measurement axis,
- wherein each receiving loop has a length of λ/2 along said measurement axis, and said flux coupling members have a pitch of λ/N (where N is an odd number of 3 or more).
5 more elements
An induction type displacement detector, comprising:
- a scale;
- a sensor head arranged opposite to said scale and movable relative to said scale in a direction along a measurement axis;
- a transmitting member arranged on said sensor head;
- a receiving winding having a plurality of receiving loops arrayed on said sensor head along said measurement axis such that a space is provided in between adjacent receiving loops;
- and
- a plurality of flux coupling members capable of flux coupling to said transmitting member and said receiving winding and arrayed on said scale along said measurement axis,
- wherein said receiving loops have a pitch of Q, and said flux coupling members have a pitch of Q/N (where N is an integer of 2 or more).
4 more elements
Dependencies are inferred from the claim text.