Development of a simple structure of milifluidic impedance-based sensor for speed measurement
Microfluidic systems for flow sensing have been widely explored, although the processes involved in their fabrication are lithography intensive making the process quite expensive and cumbersome. The aim of this work is to fabricate a device for fluid detection and identification....
Saved in:
| Main Author: | |
|---|---|
| Format: | Thesis |
| Language: | English |
| Published: |
2019
|
| Subjects: | |
| Online Access: | http://psasir.upm.edu.my/id/eprint/85574/1/FK%202020%2020%20-%20ir.pdf http://psasir.upm.edu.my/id/eprint/85574/ |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| Summary: | Microfluidic systems for flow sensing have been widely explored, although the
processes involved in their fabrication are lithography intensive making the process quite
expensive and cumbersome. The aim of this work is to fabricate a device for fluid detection and
identification. Therefore the device development consists of channel and geometry
parameters optimisation that are modelled by COMSOL, while further development
incorporates microcontroller that allows device to read and display result on LCD and excel
datasheet. Fabrication of the device does not require a complicated lab-on-chip process so device
can easily be implemented.
The high sensitivity sensor was obtained by sweeping the geometrical parameters of the configured
electrodes in a channel to reach high amount of electric field, moreover comparisons of
electrodes geometry and resulted electric fields are shown. COMSOL software is used for modelling
of channel design and allows us to input mathematical parameters; this causes better analysis to
understand the behaviour of fluid in this physical environment. Simulation is also based
on electrode and geometry optimization with COMSOL Multiphysics for creating the
sensitivity while the electrode geometry calculation is swept from different points for
sensor optimization while simulation of fluid droplet carried out by dielectric material such as
water.
Peak signal was obtained to measure the speed of a fluid in a channel besides etching technology
was also used. Data output converts to electrical reference for speed and impedance measurement
analysis while Microsoft Excel spread sheet is used as data entry from Arduino side to
computer side for further analysis. The study uses admittance measurement in order to
understand the sensitivity of each cascade
electrode for modelling as compared to the other available design using a capacitive measurement, though admittance has direct impact to its impedance once
conductivity took place. |
|---|