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Method for rapidly measuring the temperature of a workpiece on a coordinate measuring apparatus

  • US 5,195,826 A
  • Filed: 12/09/1991
  • Issued: 03/23/1993
  • Est. Priority Date: 12/10/1990
  • Status: Expired due to Term
First Claim
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1. A temperature measuring head for rapidly measuring the temperature of a workpiece on a coordinate temperature measuring head to the workpiece, the temperature measuring head comprising:

  • a fixed housing part connectable to the measuring arm of the apparatus;

    a movable part;

    connecting means for connecting said movable part to said housing part so as to permit movement of said movable part relative to said housing part when said movable part comes into contact engagement with the workpiece;

    switching means for issuing a signal for marking the time point at which said contact engagement occurs;

    temperature sensing means mounted in said movable part for measuring the temperature of the workpiece starting at said time point to obtain measured values over a predetermined time interval after said time point;

    computer means for receiving said signal for initiating temperature measurements over said predetermined time interval and for receiving and adapting said measured values to a predetermined function defining the temperature of said sensing means as a function of time; and

    ,said computer means being adapted to extrapolate said function to compute the actual temperature of the workpiece.

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