Method for determining at least one physical parameter using a sensor unit

In a method for determining at least one physical parameter, a sensor unit which is activated by at least one periodic excitation (1.4) is provided, wherein the sensor unit has at least one detection region (10) in which changes of the parameter in the surroundings of the sensor unit lead to an outp...

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Bibliographic Details
Main Author REIME GERD
Format Patent
LanguageChinese
English
Published 19.04.2017
Subjects
DETECTING MASSES OR OBJECTS
GEOPHYSICS
GRAVITATIONAL MEASUREMENTS
INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIRCHEMICAL OR PHYSICAL PROPERTIES
MEASURING
PHYSICS
TESTING
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Summary:In a method for determining at least one physical parameter, a sensor unit which is activated by at least one periodic excitation (1.4) is provided, wherein the sensor unit has at least one detection region (10) in which changes of the parameter in the surroundings of the sensor unit lead to an output signal (1.7) from the sensor unit. The sensor unit is wired such that if there are no changes of the parameter in the detection region the output signal (1.7) is a zero signal or virtually a zero signal at the output of the sensor unit, whereas if there are changes of the parameter in the detection region the output signal (1.7) is a signal that is not zero and has a specific amplitude and phase. In a closed control loop, the non-zero signal in the receive path is adjusted to zero using a control signal to achieve an adjusted state even in the presence of changes of the parameter in the detection region. The control signal is evaluated in order to determine the physical parameter. The output signal (1.7) from th
Bibliography:Application Number: CN201580041939