US 12,093,014 B2
Position calibration system and method
Chin-Yi Ouyang, Taoyuan (TW); Wei-Cheng Kuo, Taoyuan (TW); Chien-Ming Chen, Taoyuan (TW); and Xin-Yi Wu, Taoyuan (TW)
Assigned to CHROMA ATE INC., Taoyuan (TW)
Filed by CHROMA ATE INC., Taoyuan (TW)
Filed on Jan. 21, 2022, as Appl. No. 17/580,705.
Claims priority of application No. 110127102 (TW), filed on Jul. 23, 2021.
Prior Publication US 2023/0023844 A1, Jan. 26, 2023
Int. Cl. G05B 19/401 (2006.01); G01B 21/04 (2006.01)
CPC G05B 19/401 (2013.01) [G01B 21/042 (2013.01)] 9 Claims
OG exemplary drawing
 
1. A position calibration method, comprising the steps of:
(A) providing a positioner sensing module, a positioning substrate and a control unit, a circular positioner being provided on an upper surface of the positioning substrate, the positioner sensing module being electrically connected to the control unit;
(B) controlling the positioner sensing module by using the control unit to scan the positioning substrate in a first direction, recording a first initial position and a first terminal position when an edge of the circular positioner is detected by the positioner sensing module and using the control unit to acquire a midpoint between the first initial position and the first terminal position in the first direction as a first midpoint position;
(C) controlling the positioner sensing module by using the control unit to scan the positioning substrate in a second direction, recording a second initial position and a second terminal position generated by sensing the circular positioner when the edge of the circular positioner is detected by the positioner sensing module and using the control unit to acquire a midpoint between the second initial position and the second terminal position in the second direction as a second midpoint position;
(D) using the control unit to acquire an intersected center position of an extension line from the first midpoint position in a direction perpendicular to the first direction and an extension line from the second midpoint position in a direction perpendicular to the second direction as a calibration reference point of the positioning substrate with respect to the positioner sensing module; and
(E) performing automatic calibration of a position of the positioning substrate to compensate for position deviation, wherein the automatic calibration is based on the calibration reference point.