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Device for measuring swing data of baseball bat

  • US 4,515,365 A
  • Filed: 03/22/1984
  • Issued: 05/07/1985
  • Est. Priority Date: 03/23/1983
  • Status: Expired due to Fees
First Claim
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1. A swing data measuring device wherein swing data of bat swing performed by a baseball player, including level of a swing plane, inclination of the swing plane with respect to the horizontal plane and speed of the bat, is optically detected and the swing data is displayed in digital form, comprising:

  • a first light emitting/receiving means composed of a first light emitting means for forming a first light beam in approximately vertical direction with respect to the earth and a first light receiving means for receiving a first reflection light beam of the first light beam reflected of the surface of the bat;

    a second light emitter/receiving means composed of a second light emitting means for forming a second light beam in parallel to the first light beam and a second light receiving means for receiving a second reflection light beam of the second light beam reflected off the surface of the bat;

    a third light emitting/receiving means composed of a third light emitting means for forming a third light beam intersecting the first light beam and a third light receiving means for receiving a third reflection light beam of the third light beam reflected off the surface of the bat;

    a fourth light emitting/receiving means composed of a fourth light emitting means for forming a fourth light beam intersecting the second light beam and a fourth light receiving means for receiving a fourth reflection light beam of the fourth light beam reflected off the surface of the bat;

    a processing means for processing the swing data based on output signals from the four light receiving means;

    a collection means including means for collecting past swing data obtained by swings performed already and means for analyzing the swing data collected;

    a display means for displaying the processing result of the processing means and the collection means;

    said processing means comprising means for setting lower limit speed and upper limit speed of the bat; and

    a cancel means for stopping the measurement of swing data when speed of the bat is outside the speed region between set values of the lower limit speed and the upper limit speed.

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