Calibration system for compensation of arm length variation of an industrial robot due to peripheral temperature change
First Claim
1. A calibration system for compensating variation of robot arm length of an industrial robot due to temperature change comprising:
- a calibration jig insensitive to temperature variation having a plurality of measuring points; and
a noncontact sensor unit for relatively measuring a teach-in measuring point of said calibration jig and comparing the measured value of said teach-in point with an initially preset reference value thereof, thereby identifying the differential change of the robot arm length parameter due to the temperature change, said noncontact sensor unit including a camera and a laser displacement sensor which are mounted on component of said industrial robot.
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Accused Products
Abstract
A calibration system for compensating variation of robot arm length of an industrial robot because of temperature change. The system comprises a temperature variation insensible calibration jig having a pair of rectangular hexahedrons of different sizes which are combined with each other above and below and have a plurality of measuring points marked thereon. A noncontact sensor unit relatively measures a teach-in measuring point of the calibration jig and compares the measured value of the teach-in point with initially inputted value thereof, thereby calculating the variation of the robot arm length caused by the temperature change. The noncontact sensor unit includes a camera for measuring a center of the teach-in measuring point and a laser displacement sensor (LDS) for measuring relative distance between the robot hand and the teach-in measuring point and sensing three-dimensional relative error. The arm length variation is calculated, using differential value between the initially inputted value and the measured value of the teach-in measuring point, in accordance with the method of least squares.
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Citations
4 Claims
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1. A calibration system for compensating variation of robot arm length of an industrial robot due to temperature change comprising:
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a calibration jig insensitive to temperature variation having a plurality of measuring points; and a noncontact sensor unit for relatively measuring a teach-in measuring point of said calibration jig and comparing the measured value of said teach-in point with an initially preset reference value thereof, thereby identifying the differential change of the robot arm length parameter due to the temperature change, said noncontact sensor unit including a camera and a laser displacement sensor which are mounted on component of said industrial robot. - View Dependent Claims (2, 3, 4)
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Specification