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Process for measuring distance with adaptive amplification

  • US 6,094,159 A
  • Filed: 02/05/1999
  • Issued: 07/25/2000
  • Est. Priority Date: 02/07/1998
  • Status: Expired due to Term
First Claim
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1. A process for determining the distance between a distance sensor and an object, wherein an analog input signal is directed to a transmitter of the distance sensor, the transmitter emits a wave that is reflected by the object, a receiver of the distance sensor receives the reflected wave and thereupon emits an analog output signal whose level depends on the distance and/or the type of the object, the output signal is amplified by a subsequently added amplifier, the amplified signal is directed to an analog/digital converter and is converted by same into a digital signal, and the digital signal for computing a distance value is directed to an evaluation circuit, characterized by the steps of controlling the signal amplification of the amplifier in an adaptive manner depending on one of the level of the output signal and the signal value of an amplification command signal made available by the evaluation circuit, which is characteristic of an expected distance range.

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