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Open AccessArticle

A Dual-Chamber Serial–Parallel Piezoelectric Pump with an Integrated Sensor for Flow Rate Measurement

Institute of Precision Machinery and Smart Structure, Zhejiang Normal University, Jinhua 321004, China
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Sensors 2019, 19(6), 1447; https://doi.org/10.3390/s19061447
Received: 31 December 2018 / Revised: 16 March 2019 / Accepted: 18 March 2019 / Published: 25 March 2019
(This article belongs to the Section Physical Sensors)
A new concept of a dual-chamber serial-parallel piezoelectric pump with an integrated sensor (DSPPIS) is presented in this paper. By means of dividing a piezoelectric bimorph into an actuator and a sensor, sensing function is integrated onto the DSPPIS for flow rate measurement. A prototype of the DSPPIS was manufactured and assembled from a finished piezoelectric bimorph. Then, frequency and voltage characteristics were tested to evaluate the performance of the DSPPIS with serial and parallel connection. Experimental results show that the optimal frequency range of DSPPIS can be achieved and determined by itself through monitoring the sensing voltage when driven by a fixed voltage of 150 Vpp and a frequency range of 40–400 Hz. For a fixed frequency of 100 Hz and a voltage range of 50–250 Vpp, both the sensing voltage and output flow rate increase with the increase of driving voltage. It is observed that there is a positive correlation between sensing voltage and output flow rate, which was further fitted by using linear function. The correlation coefficients for the DSPPIS with serial and parallel connection are calculated as 0.9716 and 0.9054, respectively. As a result, the DSPPIS demonstrated in this paper has realized the measurement of flow rate without the additional flow-sensing equipment both in serial and parallel connection. View Full-Text
Keywords: piezoelectric pump; integrated sensor; serial connection; parallel connection piezoelectric pump; integrated sensor; serial connection; parallel connection
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Chen, S.; Yu, M.; Kan, J.; Li, J.; Zhang, Z.; Xie, X.; Wang, X. A Dual-Chamber Serial–Parallel Piezoelectric Pump with an Integrated Sensor for Flow Rate Measurement. Sensors 2019, 19, 1447.

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