Methods and systems for detecting the presence, or determining the location or the size, or detecting changes of material properties, of an object within a predefined space

A method for detecting the presence, and/or determining the location, and/or detecting changes in the material properties, of a first object (4) within a predefined space (12) and compensating for the disturbance caused by a second object, where the method comprises the following steps: providing at...

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Bibliographic Details
Main Authors SOERENSEN JOERN, SOERENSEN HENRIK RIEHM
Format Patent
LanguageEnglish
Published 15.01.2013
Subjects
ALARM SYSTEMS
DETECTING MASSES OR OBJECTS
GEOPHYSICS
GRAVITATIONAL MEASUREMENTS
MEASURING
MEASURING ELECTRIC VARIABLES
MEASURING MAGNETIC VARIABLES
ORDER TELEGRAPHS
PHYSICS
SIGNALLING
SIGNALLING OR CALLING SYSTEMS
TESTING
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Summary:A method for detecting the presence, and/or determining the location, and/or detecting changes in the material properties, of a first object (4) within a predefined space (12) and compensating for the disturbance caused by a second object, where the method comprises the following steps: providing at least a first and a second electrode (6) capacitively coupled to each other; conductively applying an electrical signal to each of the first and second electrodes (6), the electrical signals being different for the first and second electrodes (6); for each of the electrodes (6) measuring the current signal through, and/or the voltage signal on, the electrode (6); deriving from the measured values an indication of the disturbance caused by the second object; and deriving from the measured values and the indication of the disturbance a disturbance-compensated indication of the presence, and/or the location, and/or changes in the material properties, of the first object (4).
Bibliography:Application Number: US20080669359