Process for measuring distance with adaptive amplification

Communications: directive radio wave systems and devices (e.g. – Return signal controls external device – Radar mounted on and controls land vehicle

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342 73, 342 85, 342 91, 342 92, G01S 734

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060941596

ABSTRACT:
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 which is reflected by the object. A receiver of the distance sensor receives the reflected wave and thereupon emits an analog output signal whose level is dependent upon the distance and/or the type of object. The output signal is amplified by a subsequently added amplifier. The amplifier signal is directed to an analog/digital converter and is converted into a digital signal. The digital signal is directed to an evaluation circuit for the computation of a distance value. The signal amplification of the amplifier is controlled in an adaptively dependent manner on the level of the output signal and/or in a manner dependent on the signal value of an amplification signal made available by the evaluation circuit which is characteristic of an anticipated distance range.

REFERENCES:
patent: 3719942 (1973-03-01), Herman et al.
patent: 4435707 (1984-03-01), Clark
patent: 4509050 (1985-04-01), Amoroso et al.
patent: 4792804 (1988-12-01), Rubechini
patent: 5440310 (1995-08-01), Schreiner
patent: 5485155 (1996-01-01), Hibino
patent: 5654715 (1997-08-01), Hayashikura et al.
Otto Follinger, Regelungstechnik, Huthig Buch Verlag, Heidelberg, vol. 6, pp. 10-19.
Patent Abstract of Japan; JP 6-174832 A, P-1804, Sep. 26, 1994.

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