Highlights from the field of impedance spectroscopy
The working group "Impedance Spectroscopy for Measurement and Sensor Systems" is concerned with system design for introduced impedance spectroscopy for field sensors in diverse fields of application. In particular, the following topics are addressed:
- System design of impedance spectrum measurement systems
- Reduced measurement time
- Embedded and compact
- Energy saving
- Excitation signal design
- Embedded systems for impedance measurement
- Battery impedance
- Bioimpedance
- Sensors
- Sensor matrices
- Multi-modal resistive, capacitive, inductive, and impedimetric sensors
- Contactless eddy current sensors for the monitoring of welding processes
- Sensors for oil quality monitoring
- Diagnosis of storage devices
- Method for fast recording of an impedance spectrum
- Simulation models for storage and batteries
- Fast and robust signal processing and model fittings
- Ultra-sensitive sensors for real-time temperature distribution in battery packs
- Methods for cable fault localization and detection
- Diagnosis of signal cables during an ongoing communication
- Cable network diagnostics
- Bioimpedance Measurement Systems
- System design
- Stable voltage-controlled voltage sources
- Voltage-controlled voltage sources with high bandwidth
- Material characterization method
- Process-capable impedance-spectroscopy-based methods for evaluating the homogeneity of nanocomposites.
- Non-contact eddy current sensors for measuring material stress in metal during its processing
Highlights from the field of wireless energy-autonomous sensors
The wireless energy-autonomous sensors working group focuses on the energy-saving sensors that can draw energy directly from their environment and thus can be used flexibly and with low maintenance. In particular, the following topics are addressed:
- Design of novel energy harvester
- Electrodynamic broadband vibration transducer
- Magnetoelectric vibration transducer
- Piezoelectric nanogenerators
- Hybrid energy converter
- System Design of Energy Autonomous Wireless Sensors
- Energy saving system design
- Intelligent methods of energy management
- Setting and control strategies of operating conditions
- Energy modeling and prediction
- Forecasting methods for solar energy
- Batteryless systems
- Wireless energy transmission through electromagnetic fields
- RF and inductive power transmission
- Multi-coil systems and magnetic field control
- Coil optimization and coil position detection
- System design for long distances and misalignments
- Wireless sensor networks
- Energy-efficient clustering and routing
- Distributed localization with seamless coverage and networking
- Dynamic and flexible network management
- Resource allocation and task shifting
Highlights from the area of flexible sensors
The working group flexible sensors investigates new sensor concepts based on polymers and carbon-based nanomaterials in order to realize novel flexible sensors for the measurement of physical measurands, such as temperature, humidity, strain and pressure. In particular, the following sensors or topics* are developed and intensively investigated:- Synthesis and preparation of polymer nanocomposites and biocomposite films.
- Advanced methods for characterization of nanocomposites
- Highly sensitive, stable, and durable nanocomposite-based pressure sensors
- Large measuring range
- High stability
- Adaptable sensor structures
- Temperature compensated sensors
- Flexible and stretchable nanocomposite-based strain sensors
- Wide strain range
- Filament based strain sensors
- Temperature compensated sensors
- RFID based strain sensors
- Different types of sensor structures, MPA, CPW and dipole antennas
- Chip-based or chipless data transmission
- Wide bandwidth and high measurement range (UHF or higher)
- Flexible piezoelectric nanocomposite layers
- Synthesis of ceramic nanoparticles with high piezoelectric coefficients.
- Doped ceramic nanoparticles
- Advanced methods for characterization of ceramic nanoparticles
- Piezoelectric nanocomposite coatings (sol-gel and hydrothermal methods)
- Highly sensitive temperature sensors
- Humidity sensors with a fast recovery phase
*Flexible electrochemical sensors are worked on in the MST working group "Electrochemical Sensors".
Highlights from the field of electrochemical sensors
The working group "Electrochemical Sensors" deals with sensors and sensor systems for the selective detection of chemical analytes, bacteria and biomarkers. The approached sensor concepts are based on novel electrode technologies and the optimization of functionalization with nanoparticles and bioreceptors. In particular, the following topics will be addressed:
- Laser-based electrode fabrication
- Electrode functionalization with 2D nanomaterials and composites
- Highly sensitive and selective electrochemical sensors for environmental monitoring
- Water Quality Sensors
- Sensors for Nitrate, Phosphate and Potassium
- Sensors for metallic ions
- Biological sensors
- Sensors for cancer biomarkers
- Sensors for the detection of bacteria
- Food Sensors
- Gas sensors for Volatile Organic Compounds (VOCs)
- Sensor arrays (e-tongue, e-nose) for monitoring multiple contaminants
- Signal processing and machine learning
- Embedded electrochemical sensor systems as field sensors
Highlights from the area of smart wearables
This group is concerned with the system design of body-worn sensor networks (BASN) and the signal processing required to monitor human condition and activity. In particular, the following topics are addressed:
Gesture recognition
- Electromyographic biosignals
- Force myography
- Surface impedance myography
- Electrical impedance tomography
These methods are used in various applications, such as teleoperation, prosthesis control, etc.
Lung monitoring based on electrical impedance tomography
- 2D and 3D modeling using the Finite Element Method (FEM)
- AI-supported 2D and 3D image reconstruction methods
These methods are used to monitor pulmonary diseases such as acute respiratory distress syndrome (ARDS) and treatments after COVID19.
Diagnosis for epileptic seizures
- Electroencephalography (EEG)
- Electromyographic bio-signals (EMG)
- Investigation and AI-assisted classification of epileptic seizures
Compact wireless multi-sensor nodes and sensor systems
- Multisensors (temperature, inertial unit (ACC, GYR, MAG), pulse sensor).
- Signal processing for display of received signal strength (RSSI)
- Data aggregation for human motion monitoring
- Embedded edge computing for intelligent wearable systems