A method for calibrating the relative angle between the vision center and the gantry of a needle type die bonder
By using a single circular Mark point calibration plate and trigonometric function calculations in a needle-type die bonder, the angle between the camera and the gantry can be quickly calculated, solving the complexity and accuracy problems of existing calibration methods and achieving efficient angle calibration and improved positioning accuracy.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- BEIJING HAIJU ELECTRONIC TECHNOLOGY CO LTD
- Filing Date
- 2026-05-19
- Publication Date
- 2026-07-17
AI Technical Summary
Existing visual calibration methods in needle-punch die bonders are cumbersome, time-consuming, and computationally complex, making it difficult to quickly obtain the angle between the camera and the gantry on a single axis, which affects packaging yield and equipment accuracy.
A single circular Mark point calibration plate is used. By moving the gantry in the X direction at a fixed distance once and acquiring two images, combined with camera intrinsic parameter calibration, the angle between the camera pixel coordinate system and the gantry X direction is calculated using trigonometric functions, thus achieving fast and high-precision angle calibration.
It simplifies the calibration process, shortens the calibration time, improves positioning accuracy, and reduces errors, making it suitable for rapid on-site calibration of needle-type die bonders and consistency calibration of batch equipment.
Smart Images
Figure CN122415751A_ABST