Title:
GRATING DISC, METHOD FOR RECOGNIZING Z-PHASE SIGNALS, PHOTOELECTRIC ENCODER AND LASER RADAR
Document Type and Number:
WIPO Patent Application WO/2022/116017
Kind Code:
A1
Abstract:
A grating disc (1004), a photoelectric encoder (1000), a laser radar and a method for recognizing Z-phase signals (Z1, Z2, Z3); the grating disc (1004) comprises a disc (11), at least two Z-phase grooves are distributed on the disc (11) in the radial direction, and when the Z-phase grooves (21, 22, 23,…,2n) on the disc (11) is anomalous due to contamination, a Z-phase signal (Z3) generated by an anomalous Z-phase groove (23) can be quickly recognized by means of the preset distribution positions of the Z-phase grooves (21, 22, 24,..., 2n), and then zero calibration can be realized by using the remaining normal Z-phase grooves (21, 22, 24,..., 2n), thereby improving the reliability of zero calibration.
Inventors:
LI KEVIN (CN)
Application Number:
PCT/CN2020/133183
Publication Date:
June 09, 2022
Filing Date:
December 01, 2020
Export Citation:
Assignee:
SUTENG INNOVATION TECH CO LTD (CN)
International Classes:
G01D5/347
Foreign References:
| CN105953824A | 2016-09-21 | |||
| CN108716927A | 2018-10-30 | |||
| CN111279158A | 2020-06-12 | |||
| CN107014317A | 2017-08-04 | |||
| CN106989763A | 2017-07-28 | |||
| CN104613991A | 2015-05-13 | |||
| CN103192395A | 2013-07-10 | |||
| CN106482764A | 2017-03-08 | |||
| US20170038228A1 | 2017-02-09 |
Attorney, Agent or Firm:
BEIJING HENGBO INTELLECTUAL PROPERTY AGENT LTD. (CN)
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