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Calibration system for compensation of arm length variation of an industrial robot due to peripheral temperature change

  • US 5,400,638 A
  • Filed: 07/27/1994
  • Issued: 03/28/1995
  • Est. Priority Date: 01/14/1992
  • Status: Expired due to Term
First Claim
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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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