Title:
エンコーダ
Document Type and Number:
Japanese Patent JP6723827
Kind Code:
B2
Abstract:
An encoder includes: a reading device that reads respective electric signals from two incremental patterns respectively having graduation array pitches different from each other; a control device that calculates a measurement value, based on the electric signals; and an output device that outputs the measurement value. The control device includes: an absolute position synthesis unit that synthesizes two electric signals to generate a synthesized absolute position; a detection unit that detects two relative positions from the two electric signals; a position calculation unit that performs an arithmetic operation between the relative positions and the synthesized absolute position to calculate a calculated absolute position; an absolute position comparison unit that compares the calculated absolute position with the synthesized absolute position; and a relative position comparison unit that compares the two relative positions with each other. The output device outputs error information, based on a comparison result output from the control device.
Inventors:
Naoki Kobayashi
Application Number:
JP2016103428A
Publication Date:
July 15, 2020
Filing Date:
May 24, 2016
Export Citation:
Assignee:
Mitutoyo Corporation
International Classes:
G01D5/244
Domestic Patent References:
| JP2015094677A | ||||
| JP2009257891A |
Foreign References:
| WO2015151230A1 | ||||
| US20130090890 |
Attorney, Agent or Firm:
Shigeki Orizaka