A method for positioning a nail hole position for a screwing of an industrial robot

CN116834000BActive Publication Date: 2026-08-28NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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Patent Information

Application Number
CN202310636998.3
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2023-05-31
Publication Date
2026-08-28
Estimated Expiration
2043-05-31

AI Technical Summary

Technical Problem

[0003]传统的工业机器人拧钉位置确定方法采用人工示教方式,每一个钉孔均需要提前进行工业机器人位置示教,这种方式增加了人工作业强度,灵活性差,同时由于每个工件安装固定存在偏差,每个工件加工制造钉孔位置一致性差,导致采用人工示教方法不适用于流水线装配作业

Benefits of technology

[0013]本发明实施例提供的用于工业机器人拧钉的钉孔位置定位方法,利用两台工业相机及镜头标定组成为双目视觉检测装置,分别标定双目视觉检测装置坐标系、拧钉末端执行器坐标系与工业机器人法兰盘坐标系之间的矩阵变换关系;然后计算拧钉末端执行器在示教钉孔位置处的工业机器人位姿,采集双目视觉检测装置在检测示教钉孔时的工业机器人位姿和示教钉孔图像信息,计算拧钉末端执行器运动至示教钉孔位置时示教钉孔坐标系和工业机器人法兰盘坐标系之间的矩阵变换关系;最后双目视觉检测装置检测任意钉孔,通过矩阵变换关系,计算拧钉末端执行器运动至钉孔时工业机器人所需位姿参数。具体的,通过双目视觉检测装置对钉孔位置进行检测定位,通过矩阵转换求解得到工业机器人拧钉所需的工业机器人位姿参数,避免了人工示教钉孔位置的繁重工作,同时解决了因工件制造、安装导致的钉孔位置偏移,双目视觉检测装置与工业机器人法兰盘标定误差对钉孔位置检测精度的影响。

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Abstract

The embodiment of the application discloses a nail hole position positioning method for industrial robot screwing, relates to the technical field of intelligent manufacturing, and has low hand-eye calibration precision requirements for binocular vision detection devices and flanges of industrial robots, can effectively reduce the influence of calibration errors on nail hole position detection positioning precision, and improves nail hole position detection positioning efficiency and precision. The application comprises the following steps: calibrating the binocular vision detection device to obtain coordinate system information of an industrial robot screwing system; obtaining a matrix transformation relationship between {CF} and {FF}, and obtaining a matrix transformation relationship between {NF} and {FF}; when a screwing end effector moves to a theoretical nail hole position, a matrix transformation relationship between {FF} and {HF} is obtained; and according to the calculated matrix transformation relationship between the coordinate systems, the pose parameters of the industrial robot required for the screwing end effector to move to a target nail hole position are calculated.
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Citation Information

Patent Citations

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    CN108312144A

  • Visual guidance industrial robot system calibration method

    CN114474058A