A low frequency driven piezoelectric pump with flexible valve

Chen, Song; Qian, Chaoping; Cheng, Weiren; Kan, Junwu; Ji, Jiajian; Zhang, Zhonghua; Wang, Jiantao

doi:10.1016/j.sna.2021.112567

Cited by 11 publications

(4 citation statements)

References 24 publications

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“…It has received extensive attention in the aspects of on-chip laboratory, chemical analysis, drug injection, inkjet printing, engine oil supply, electronic chip cooling process, and precision hydraulic work table [3][4][5][6][7][8][9].…”

Section: Introductionmentioning

confidence: 99%

A phase modulation method of sine signal for dual-active-valve piezoelectric pump

Sun,

Deng,

Wang

et al. 2024

Meas. Sci. Technol.

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A phase modulation method with wide range and high resolution for sine signal is essential for a dual-active-valve piezoelectric pump (DAVPP) control. In DAVPP, by phase modulation, the flow direction can be changed, the output flow rate and pressure can be precisely adjusted. In this article, the authors developed a phase modulation method for sine signal. This method is characterized by both the combination of hardware and software, and the combination of digital circuit and analog circuit. In hardware, a sinxcosφ constructing circuit and a cosxsinφ constructing circuit are specially structured, which enables phase modulation to be achieved. In software, the output phase is determined by the digital controlling quantities sent by the main control chip and stored in the form of a table. Analytical formulas of the cosine constructing table tab_cos and the sine constructing table tab_sin are analyzed and structured. Experimental results show that the output phase can be regulated linearly and continuously, within a range of 0° to 360°. Its resolution can be improved according to the requirements. Although the modulation process and circuit are simple, it can effectively solve the problem of sine signal phase modulation for DAVPP control.

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Section: Introductionmentioning

confidence: 99%

A phase modulation method of sine signal for dual-active-valve piezoelectric pump

Sun,

Deng,

Wang

et al. 2024

Meas. Sci. Technol.

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show abstract

“…However, the problems of high processing difficulty and the bulky shape of the two forms are obvious. Other forms, such as the flexible film valve [ 29 ], cymbal-shaped slotted valve [ 30 ], and venous imitation valve, have also been presented [ 31 , 32 ]. Moreover, the poor precision of the valve body and the insufficient cut-off are their common shortcomings.…”

Section: Introductionmentioning

confidence: 99%

A Dual-Inlet Pump with a Simple Valves System

Wang,

Liu,

Wang

et al. 2023

Micromachines

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To ameliorate the deficient output flow performance of the piezoelectric pumps with cantilever valves, a dual-inlet pump with a simple valves system is proposed. On the basis of explaining the structure design of the prototype, the working principle of the prototype is explained, and the output flow is theoretically analyzed. Then, the manufacturing process of the prototype is introduced. The general operating frequency of the pump was obtained by combining the finite element analysis of the piezoelectric actuator under dry and wet modes with the mechanical vibration test, and a series of measured flow rates were compared and improved through valve stiffness optimization and pump chamber height adjustment in the subsequent control experiment. The proposed piezoelectric pump achieves a maximum flow rate of 33.18 mL/min at a 180 Vp-p voltage with the driving frequency of 100 Hz, which may bring new inspiration for the application of small intelligent pumps in the field of microfluidics.

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“…Generally, the fluid is driven by the piezoelectric pump through the piezoelectric vibrator and special structures. It has the advantages of a simple structure [ 15 ], easy miniaturization [ 16 ], and no electromagnetic interference [ 17 ], leading to widespread use in microfluidic applications [ 5 , 6 , 7 ], medical equipment [ 18 , 19 , 20 ], fuel cells [ 21 , 22 , 23 ], and other fields. In terms of structure, piezoelectric pumps can be divided into valve-based piezoelectric pumps and valve-less piezoelectric pump [ 13 ].…”

Section: Introductionmentioning

confidence: 99%

“…When the frequency reaches a certain critical value, the piezoelectric pump has a dynamic balance, and the pump flow is reduced to zero, resulting in the phenomenon named known as “pump lagging of valve”. Valve-based piezoelectric pumps include: flexible-valve piezoelectric pumps [ 16 ], bionic-valve piezoelectric pumps [ 24 ], self-priming-valve piezoelectric pumps [ 25 ], etc. A special flow channel is employed in valve-less piezoelectric pumps to replace the valve structure in valve piezoelectric pumps, in which the pump-lagging of the valve is effectively avoided.…”

Section: Introductionmentioning

confidence: 99%

Working Mechanisms and Experimental Research of Piezoelectric Pump with a Cardiac Valve-like Structure

Zhou

Sun²,

Fu³

et al. 2022

Micromachines

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In this study, based on the working principle of the cardiac valve structure that prevents blood from flowing back, a piezoelectric pump with a cardiac valve-like structure (PPCVLS) is designed. The operating principles of cardiac-valve-like structures (CVLSs) are introduced. Furthermore, the closure conditions of the CVLSs on both sides of the flow channel are explored. The principle behind the working-state conversion between “valve-based” and “valve-less” of PPCVLS is also analyzed. A high-speed dynamic microscopic image-analysis system was utilized to observe and verify the working-state conversion between “valve-based” and “valve-less” PPCVLSs. The resonant frequency of the piezoelectric pump was measured by Doppler laser vibrometer, and the optimal working frequency of the piezoelectric vibrator was determined as 22.35 Hz. The prototype piezoelectric pump was fabricated by the 3D printing technique, and the output performance of the piezoelectric pump was also evaluated. The experimental results show that the piezoelectric pump is valve-based when the driving voltage is greater than 140V, and the piezoelectric pump is valve-less when the driving voltage is less than 140 V. Furthermore, the maximum output pressure of the piezoelectric pump was 199 mm H2O when driven by the applied voltage of 220 V at 7 Hz, while the maximum flow rate of the piezoelectric pump was 44.5 mL/min when driven by the applied voltage of 220 V at 11 Hz.

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A low frequency driven piezoelectric pump with flexible valve

Cited by 11 publications

References 24 publications

A phase modulation method of sine signal for dual-active-valve piezoelectric pump

A phase modulation method of sine signal for dual-active-valve piezoelectric pump

A Dual-Inlet Pump with a Simple Valves System

Working Mechanisms and Experimental Research of Piezoelectric Pump with a Cardiac Valve-like Structure

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