US 6,633,815 B1Granted

Method for measuring the distance and speed of objects

AssigneeRobert Bosch GmbH

InventorsKlaus Winter, Reiner Marchthaler, Ralph Lauxmann, Albrecht Irion

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Abstract

A method for measuring the distance and speed of objects using electromagnetic waves with a motor vehicle radar system is described, electromagnetic waves being transmitted and simultaneously received, the transmitted electromagnetic waves being modulated in the shape of a ramp, at least the signals received during one rise and one drop of the frequency of the transmitted signal being mixed in each case with the transmitted signal, a number of intermediate frequency signals being formed, and the distance and speed of the object being calculated using the intermediate frequency, a weather condition in the vicinity of the motor vehicle and/or a disturbance in the motor vehicle radar system being identified on the basis of characteristic intermediate frequency signals.

Claims7

Dependent claims

A method for measuring a distance and a speed of an object using electromagnetic waves in a radar system of a motor vehicle, comprising the steps of:

transmitting and simultaneously receiving the electromagnetic waves;
modulating the transmitted electromagnetic waves in a shape of a ramp;
mixing with the transmitted electromagnetic waves at least signals received during one rise and one drop of a frequency of the transmitted electromagnetic waves;
forming a number of intermediate frequency signals;
calculating the distance and the speed of the object in accordance with the number of the intermediate frequency signals;
and
identifying at least one of a weather condition in a vicinity of the motor vehicle and a disturbance in the radar system on the basis of those of the number of the intermediate frequency signals that are characteristic intermediate frequency signals.

4 more elements

Dependencies are inferred from the claim text.