Abstract
We present a measurement setup to monitor the glycerol concentration in aqueous glycerol solutions. The setup comprises a micromachined thermal flow sensor, a piezoelectric micropump, a well-defined flow channel, a differential pressure sensor, and a temperature controller for a constant setup temperature. The micropump establishes circulation with a constant pressure difference between in- and outlet of the channel ensuring a flow rate in the closed-loop system that is strictly related to the viscosity and, equivalently, to the glycerol concentration. A calorimetric flow sensor operating in the constant over-temperature mode measures the flow rate from which the glycerol concentration can be deduced. The overall system design was supported by FEM simulations. Finally, we report on measurement results which confirm good agreement between theory and experiment.
| Original language | English |
|---|---|
| Title of host publication | In Proceedings of the Microelectronic Systems Symposium (MESS) |
| Pages | 1-6 |
| Number of pages | 6 |
| Publication status | Published - 2014 |
Fields of science
- 202019 High frequency engineering
- 202021 Industrial electronics
- 202036 Sensor systems
- 203017 Micromechanics
- 202 Electrical Engineering, Electronics, Information Engineering
- 202027 Mechatronics
- 202028 Microelectronics
- 202037 Signal processing
JKU Focus areas
- Mechatronics and Information Processing