Design of a Pneumatic Flow Rate Control Microvalve Driven by a Stepper-Motor

Abstract:

A pneumatic microvalve which can be used in pneumatic pressure control for lab-on-a-chip applications is presented in this paper. In order to realize a feedback control and miniaturization, a micro stepper-motor is selected to control the opening of the microvalve. After introducing the structure and working principle of the pneumatic microvalve driven by a stepper-motor, the static flow rate simulation of pneumatic stepper-motor microvalve is processed in the condition of different opening sizes of the microvalve and pressure difference over the valve. The stepper-motor microvalve is fabricated and corresponding control circuit is designed. Experiments on static and dynamic characteristics of the microvalve are carried out. Good agreement has been shown between the simulation and experimental results.

• Periodical: Applied Mechanics and Materials (Volume 779)
• Pages: 244-249
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.779.244
• Online since: July 2015
• Authors: Jin Xian Wang*, Zeng Wen, Song Jing Li
• Keywords: Microfluidic, Pneumatic Microvalve, Pressure Control, Stepper-Motor

References

[1] Whitesides G M. The origins and the future of microfluidics[J]. Nature, 2006, 442(7101): 368-373.

DOI: 10.1038/nature05058

[2] B.C. Lin & J.H. Qin: Lab on a chip. Science Press(Beijing), (2006).

[3] Balagaddé F K, You L, Hansen C L, et al. Long-term monitoring of bacteria undergoing programmed population control in a microchemostat[J]. Science, 2005, 309(5731): 137-140.

DOI: 10.1126/science.1109173

[4] Fujii T. PDMS-based microfluidic devices for biomedical applications[J]. Microelectronic Engineering, 2002, 61: 907-914.

DOI: 10.1016/s0167-9317(02)00494-x

[5] Demello A J. Control and detection of chemical reactions in microfluidic systems[J]. Nature, 2006, 442(7101): 394-402.

DOI: 10.1038/nature05062

[6] He D, Zhang Z, Huang Y, et al. Chemiluminescence microflow injection analysis system on a chip for the determination of nitrite in food[J]. Food Chemistry, 2007, 101(2): 667-672.

DOI: 10.1016/j.foodchem.2006.02.024

[7] Pamula V K, Chakrabarty K. Cooling of integrated circuits using droplet-based microfluidics[C]/Proceedings of the 13th ACM Great Lakes symposium on VLSI. ACM, 2003: 84-87.

DOI: 10.1145/764808.764831

[8] J.H. Wang & Z.L. Fang. The third generation of flow injection analysis: current situation and perspectives of lab on valve scheme[J]. Chinese Journal of Analytical Chemistry, Vol. 32(2004) No. 10, pp.1401-1406.

[9] Yager P, Edwards T, Fu E, et al. Microfluidic diagnostic technologies for global public health[J]. Nature, 2006, 442(7101): 412-418.

DOI: 10.1038/nature05064

[10] S.J. Li, X.L. Liu & W.L. Jia. Simulation on characteristics of a pneumatic electromagnetic microvalve[J]. Hydraulic and Pneumatic, 2013, 7: 6-8.