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Winding and scale construction for inductive position encoders

An encoder and scale technology, applied in the field of measuring instruments, can solve problems such as system limitations

Active Publication Date: 2021-11-30
MITUTOYO CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, these systems may be limited in their ability to provide some combination of user-desired features, such as combinations of compact size, signal strength, high resolution, cost, robustness to misalignment and contamination, etc.

Method used

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  • Winding and scale construction for inductive position encoders
  • Winding and scale construction for inductive position encoders
  • Winding and scale construction for inductive position encoders

Examples

Experimental program
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Embodiment Construction

[0024] figure 1is an exploded isometric view of a hand tool type caliper 100 including a scale member 102 having a generally rectangular cross-section including scale 170 and a slider assembly 120 . In various embodiments, the scale 170 may extend along the measurement axis direction MA (eg, corresponding to the x-axis direction), and may include a signal modulation scale pattern 180 . A cover layer 172 of known type (eg, 100 μm thick) may cover the scale 170 . Jaws 108 and 110 near the first end of scale member 102 and movable jaws 116 and 118 on slide assembly 120 are used in a known manner to measure the size of an object. The slider assembly 120 may optionally include a depth rod 126 retained by an end stop 154 ​​in a depth rod groove 152 below the scale member 102 . The depth rod engagement end 128 can be extended into the bore to measure its depth. Cover 139 of slider assembly 120 may include on / off switch 134 , zero set switch 136 and measurement display 138 . the b...

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PUM

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Abstract

An electronic position encoder comprising a scale comprising first and second pattern tracks having corresponding signal modulated scale patterns, a detector and a signal processing arrangement. The detector includes first and second track field generating coil portions surrounding first and second inner regions, respectively, aligned with the first and second pattern tracks. The first track and the second track field generating coil section each comprise first and second elongate sections extending in the direction of the measurement axis connected to end sections extending along a y-axis transverse to the measurement axis. The detector includes a sensing element that spans the first and second interior regions along the y-axis. The nominal y-axis trace width dimension of the elongated portion is at least 0.1 times the y-axis width of the first and / or second inner region. In various embodiments, shielding end sections may be used to connect the elongate sections.

Description

[0001] Cross References to Related Applications [0002] This application is a continuation-in-part of U.S. Patent Application Serial No. 15 / 245,560, filed August 24, 2016, entitled "WINDING CONFIGURATION FOR INDUCTIVE POSITION ENCODER," the disclosure of which is hereby incorporated by reference in its entirety. technical field [0003] The present invention relates to surveying instruments, and more particularly to inductive position encoders, which may be used in precision surveying instruments. Background technique [0004] Various encoder configurations may include various types of optical, capacitive, magnetic, inductive, motion and / or position transducers. These transducers utilize various geometries of transmitters and receivers in the readhead to measure movement between the readhead and the scale. Magnetic and inductive transducers are relatively robust to contamination, but not perfect. [0005] U.S. Patent No. 6,011,389 (the '389 patent) describes an induced cu...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01D5/249
CPCG01D5/249G01B3/20G01D5/2053G01D5/2275
Inventor T.S.库克
Owner MITUTOYO CORP
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