Title:
LASER LIGHT EXIT DIRECTION CALIBRATION METHOD EMPLOYING STANDARD BALL
Document Type and Number:
WIPO Patent Application WO/2021/179460
Kind Code:
A1
Abstract:
A laser light exit direction calibration method employing a standard ball comprising the following steps: S1, mounting a laser light displacement sensor (105) on a machine tool spindle (100), fixing a standard ball (102) on an operation platform (103), and causing the machine tool spindle (100) to drive the laser light displacement sensor (105) to perform scanning and measurement on an upper surface of the standard ball (102) so as to acquire coordinates of a machine tool and a corresponding one-dimensional measured distance value of the sensor; S2, merging acquired original data, and converting same to a spherical coordinate system, and constructing, on the basis of the converted data, a nonlinear equation set relating to the spherical coordinates and a light exit direction; and S3, converting a solution of the nonlinear equation set into a least squares optimization of a new function φ(x), then using a Levenberg-Marquardt iterative optimization algorithm to solve the new function φ(x) so as to acquire a laser light exit direction and sphere center coordinates. The method improves efficiency, and has good applicability.
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Inventors:
LI WENLONG (CN)
KOU MENG (CN)
WANG GANG (CN)
KOU MENG (CN)
WANG GANG (CN)
Application Number:
PCT/CN2020/095989
Publication Date:
September 16, 2021
Filing Date:
June 13, 2020
Export Citation:
Assignee:
UNIV HUAZHONG SCIENCE TECH (CN)
International Classes:
B23Q17/24; B23Q17/22; G01B11/02
Foreign References:
| CN109773686A | 2019-05-21 | |||
| CN109884659A | 2019-06-14 | |||
| CN105404238A | 2016-03-16 | |||
| CN110186372A | 2019-08-30 | |||
| DE102016106648A1 | 2017-10-12 |
Attorney, Agent or Firm:
WUHAN HUAZHIYU INTELLECTUAL PROPERTY AGENCY CO., LTD. (CN)
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