Automatic noise threshold determining circuit and method for a laser range finder

  • US 5,612,779 A
  • Filed: 01/19/1995
  • Issued: 03/18/1997
  • Est. Priority Date: 01/19/1995
  • Status: Expired due to Term
First Claim
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1. An automatic noise threshold system for operative association with central processing and signal receiving sections of a signal pulse transmitting device for discriminating between an actual return signal pulse and noise that is associated with said actual return signal pulse, said system comprising:

  • determining means responsive to said central processing section for determining a desired signal-to-noise ratio for a series of said actual return signal pulses and said associated noise received through said signal receiving section, each one of said return signal pulses and associated noise having a representative pulse value with respect to a signal pulse that was previously transmitted from said signal pulse transmitting device and that corresponds thereto; and

    stack-placing means responsive to said central processing section for placing up to a preselected number of said representative pulse values in a stack until a predetermined number of said representative pulse values coincide within a specified precision, wherein said predetermined number of said representative pulse values that coincide within said specific precision are considered to be representative of said actual return signal pulse.

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