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Method and system for contactless measurement of railroad wheel characteristics

  • US 5,636,026 A
  • Filed: 03/16/1995
  • Issued: 06/03/1997
  • Est. Priority Date: 03/16/1995
  • Status: Expired due to Term
First Claim
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1. A method for measuring in a contactless manner a characteristic of a wheel, said method comprising the steps of:

  • (a) projecting a point beam of energy at a surface location on the wheel, said point beam of energy impinging said surface location from a substantially orthogonal direction and impinging said surface location only at a point;

    (b) sensing a reflection of said point beam of energy from said wheel and producing therefrom an electrical analog signal representing said characteristic of said wheel;

    (c) digitizing said electrical analog signal to directly produce a digital output signal representing said characteristic of said wheel; and

    (d) automatically repositioning said point beam of energy projected at the wheel to a new surface location traverse a radial circumference of the wheel and repeating said steps (b) &

    (c) for at least one new surface location on the wheel.

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