Abschlussarbeiten - Master
Konzeption, Modellierung und experimentelle Charakterisierung wichtiger Systemkomponenten eines material-integrierten, kapazitiven Messsystems
Art der Abschlussarbeit
Master
Autoren
- Zhang, Yunbo
Betreuer
- Prof. Dr.-Ing. habil. Wolf-Joachim Fischer
- Dr.-Ing. Sebastin Sauer
Abstract
A capacitive measurement system enables a non-contact determination of electrical parameters,
e.g. the electric absolute or relative permittivity. Furthermore, additional quantities
such as touch, humidity, water level etc. can be deduced and measured. This master thesis
is of particular interest for the modelling, development and characterization of electrode
structures for Fibre-reinforced plastic-integrated, capacitive measurement systems. These
measuring systems are used for, e.g., controlling and monitoring production processes,
monitoring technical structures for changes and damages, as a signal generator for counting
duties (presence events) or for level measurement in containers. Particularly with
electrode arrangements, a particular aim of this work was the investigation, development
and presentation of an application-oriented design method. The basic characteristics
of the strip line technology and associated measuring principles are explained, various
system concepts presented and an overview of the current technical and patent status
provided. In this thesis analytical and semi-analytical equations of different strip line
variants are compared, taking into account the presence of air and water. To this target,
model implementations are performed in MATLAB. The capacity change between air
and water applications depends on the given geometry and material data. Furthermore,
the simulation program Sonnet developed a numerical model and carried out parameter
studies. Numerical investigations of the absolute capacitance values of electrode structures
and capacitance differences in the media variation were carried out, e.g. important
basic factors (Material and geometry parameters) as well as simulator-specific influencing
factors (spatial range, frequency, structure, etc.). The simulated data were compared
with the obtained data from experiments as well as with reference data known from the
literature and analysed. In addition, investigations were carried out on real samples, which
were created using the layout program Target 3001!, And factory-made samples with
selected geometry and material parameters for model testing and calibration. For this
purpose, a measurement setup and a measuring sequence were designed and implemented.
Reference measurements were made to determine the capacitance of known capacitors.
The measurement data obtained from raw data were then compared with the simulation
results of Sonnet and MATLAB. Then technical, economic data from CDC Converters
and value-continuous, value-discrete electrodes were compared. Furthermore, the design
of the electrode arrays for the approach of length and embedding depth for three designs
for the application orientation for selected two CDC converters was presented. Finally, a
brief summary and outlook for the future will be given.
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e.g. the electric absolute or relative permittivity. Furthermore, additional quantities
such as touch, humidity, water level etc. can be deduced and measured. This master thesis
is of particular interest for the modelling, development and characterization of electrode
structures for Fibre-reinforced plastic-integrated, capacitive measurement systems. These
measuring systems are used for, e.g., controlling and monitoring production processes,
monitoring technical structures for changes and damages, as a signal generator for counting
duties (presence events) or for level measurement in containers. Particularly with
electrode arrangements, a particular aim of this work was the investigation, development
and presentation of an application-oriented design method. The basic characteristics
of the strip line technology and associated measuring principles are explained, various
system concepts presented and an overview of the current technical and patent status
provided. In this thesis analytical and semi-analytical equations of different strip line
variants are compared, taking into account the presence of air and water. To this target,
model implementations are performed in MATLAB. The capacity change between air
and water applications depends on the given geometry and material data. Furthermore,
the simulation program Sonnet developed a numerical model and carried out parameter
studies. Numerical investigations of the absolute capacitance values of electrode structures
and capacitance differences in the media variation were carried out, e.g. important
basic factors (Material and geometry parameters) as well as simulator-specific influencing
factors (spatial range, frequency, structure, etc.). The simulated data were compared
with the obtained data from experiments as well as with reference data known from the
literature and analysed. In addition, investigations were carried out on real samples, which
were created using the layout program Target 3001!, And factory-made samples with
selected geometry and material parameters for model testing and calibration. For this
purpose, a measurement setup and a measuring sequence were designed and implemented.
Reference measurements were made to determine the capacitance of known capacitors.
The measurement data obtained from raw data were then compared with the simulation
results of Sonnet and MATLAB. Then technical, economic data from CDC Converters
and value-continuous, value-discrete electrodes were compared. Furthermore, the design
of the electrode arrays for the approach of length and embedding depth for three designs
for the application orientation for selected two CDC converters was presented. Finally, a
brief summary and outlook for the future will be given.
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Schlagwörter
-
Berichtsjahr
2016