Flow Control Based on Constant Pressure Microfluidic Pump System

DOI

10.2991/cmfe-15.2015.209How to use a DOI?

Keywords

injection system;constant pressure;flow rate; wireless communication; flow resistors

Abstract

Microfluidic driving and controlling techniques are fundamental and important in microfluidic applications. Traditional reagent driving systems of microfluidic chips such as syringe pump and piezoelectric actuator have their inherent shortcomings. Syringe pumpis easy to deformation and screw motion is unstable mayaffect flow rate. Whilethe flow range of piezoelectric actuator is too narrow.To solve these problems we establisheda constant pressure pump by maintaining stable pressure in a cylinder through the switch of electromagnetic valves, and then liquidin the pressurized reservoiris driven out. A simple PID algorithm is utilized to balance cylinder pressure,while flow rate is measured by a flow sensor. This setupcontains a wireless module that can communicate with a PC through Wi-Fi. We use 50?minner diameter flow resistors with different lengths to verify the relationship among flow rate, flow resistor length and pressure drop.The pump could generate a constant pressure in cylinder and the fluctuation of liquid flow is small.This system can be used as injection system of microfluidic chips and it can also be applied to other biochemical reaction. Operation is easy and users can control the system at a distance.

Copyright

© 2015, the Authors. Published by Atlantis Press.

Open Access

This is an open access article distributed under the CC BY-NC license (http://creativecommons.org/licenses/by-nc/4.0/).

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TY  - CONF
AU  - Limin Lu
AU  - Ruichang Ke
AU  - Shenglan Zeng
AU  - Quanjun Liu
PY  - 2015/07
DA  - 2015/07
TI  - Flow Control Based on Constant Pressure Microfluidic Pump System
BT  - Proceedings of the International Conference on Chemical, Material and Food Engineering
PB  - Atlantis Press
SP  - 883
EP  - 886
SN  - 2352-5401
UR  - https://doi.org/10.2991/cmfe-15.2015.209
DO  - 10.2991/cmfe-15.2015.209
ID  - Lu2015/07
ER  -