Method and apparatus for calibrating a non-contact gauging sensor with respect to an external coordinate system

  • US 4,841,460 A
  • Filed: 09/08/1987
  • Issued: 06/20/1989
  • Est. Priority Date: 09/08/1987
  • Status: Expired due to Term
First Claim
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1. A method for calibrating an arbitrarily oriented non-contact measurement sensor that is pre-calibrated and includes a structural light source and optical sensing means, with respect to an external coordinate system, the method comprising:

  • using the structured light from the sensor to create a target lying simultaneously within a measuring zone of the sensor and a measuring zone of measuring means external to the sensor;

    using the sensor to determine first spatial coordinates of the target expressed in terms of the sensor'"'"'s coordinate system;

    using the external measuring means to determine second spatial coordinates of the target expressed in terms of the external coordinate system; and

    transforming the first spatial coordinates into the coordinates expressed in terms of the external system using the first and second spatial coordinates of the target.

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