DEVICE AND METHOD FOR EVALUATING A USEFUL SIGNAL ORIGINATING FROM A PROXIMITY SENSOR

The invention relates to a device and method for evaluating a useful signal U(t) originating from a proximity sensor. The device comprises a first recognition means ( 17 ) which changes the switching state thereof when the value (U1(t)) of a first signal produced from the useful signal exceeds a fir...

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Bibliographic Details
Main Author REIME, GERD
Format Patent
LanguageEnglish
French
German
Published 25.05.2005
Edition7
Subjects
BASIC ELECTRIC ELEMENTS
BASIC ELECTRONIC CIRCUITRY
ELECTRIC SOLID STATE DEVICES NOT OTHERWISE PROVIDED FOR
ELECTRICITY
OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS
OPTICS
PHYSICS
PULSE TECHNIQUE
SEMICONDUCTOR DEVICES
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Summary:The invention relates to a device and method for evaluating a useful signal U(t) originating from a proximity sensor. The device comprises a first recognition means ( 17 ) which changes the switching state thereof when the value (U1(t)) of a first signal produced from the useful signal exceeds a first limit value that characterizes the proximity of an object. In addition, a second recognition means ( 34 ) is provided which changes the switching state thereof from a first to a second state when the value (U(t)) of the useful signal exceeds a second limit value that characterizes the removal of an object. A decision means ( 32 ), which is connected to the first recognition means ( 17 ) and to the second recognition means ( 34 ), changes its switching state when the first recognition means ( 17 ) changes the switching state thereof from its first to a second switching state, and the second recognition means does not change the switching state thereof during a predetermined first time span (Deltat1) after the switching state of the first recognition means is changed.
Bibliography:Application Number: EP20010901151