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Method and apparatus for measurement of length and height of objects

  • US 4,528,651 A
  • Filed: 02/04/1983
  • Issued: 07/09/1985
  • Est. Priority Date: 02/04/1983
  • Status: Expired due to Fees
First Claim
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1. A method of measuring the length and height or diameter of a geometrically regular object randomly positioned from side to side on a moving conveyor system which comprisesa. orienting the object so that it is positioned with its longitudinal axis normal to the direction in which it is being conveyed;

  • b. conveying the object to a measuring station between opposed echo-ranging transducers located on each side of the conveyor system;

    c. determining the length of the object and its transverse position on the conveyor system by differential echo-ranging;

    d. sending at least the transverse position to a microprocessor;

    e. advancing the object beneath a transverse array of diameter sensing echo-ranging transducers;

    f. activating the transducer in the aray which is closest to the mid-length position of the object to measure the height or diameter by echo-ranging, said transducer being selected by the microprocessor on the basis of transverse position location; and

    g. indicating the length and diameter of the object.

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