A stand-alone peristaltic micropump based on piezoelectric actuation

Ling Sheng Jang, Yuan Jie Li, Sung Ju Lin, Yi Chu Hsu, Wu Sung Yao, Mi Ching Tsai, Ching Cheng Hou

Research output: Contribution to journalArticlepeer-review

66 Citations (Scopus)

Abstract

Despite significant efforts to develop micropumps, cumbersome driving equipment means that the design of portable micropumps remains a challenge. This study presents a stand-alone micropump system, which includes a peristaltic micropump based on piezoelectric actuation and a driving circuit. This battery-based driving circuit comprises a 12 V battery, an ATmega 8535 microprocessor, a 12 V-to-180 V DC to DC converter using transformerless technology, three differential amplifiers, an IC 7805, a phase controller, an A/D converter, a keyboard and an LCD module. The system can produce step-function signals with voltages of up to 228 Vpp and frequencies ranging from 10 Hz to 100 kHz, as the inputs for the pump. It is portable and programmable with the package size of 22 × 12.8 × 9 cm. Additionally, this proposed system is used to design the driving signals of the pump which are 3-, 4, and 6-phase actuation sequences. This work performs the circuit testing and fluid pumping, and demonstrates the effects of actuation sequences on pump performance in terms of the dynamic behavior of the diaphragm, flow rates, back pressure and power consumption of the system. The experimental results show that the pump excited by the 6-phase sequence results in better performance compared with the 3- and 4-phase sequences, and produces a maximum flow rate of 36.8 μl/min and a maximum back pressure of 520 Pa with deionized water at 100 Vpp and 700 Hz.

Original languageEnglish
Pages (from-to)185-194
Number of pages10
JournalBiomedical Microdevices
Volume9
Issue number2
DOIs
Publication statusPublished - 2007 Apr 1

All Science Journal Classification (ASJC) codes

  • Biomedical Engineering
  • Molecular Biology

Fingerprint Dive into the research topics of 'A stand-alone peristaltic micropump based on piezoelectric actuation'. Together they form a unique fingerprint.

Cite this