Electromagnetic actuation dual-chamber bidirectional flow micropump

Rusli, Mqa; Chee, Pei Song; Arsat, Rashidah; Lau, Khai Xin; Leow, Pei Ling

doi:10.1016/j.sna.2018.08.047

Cited by 49 publications

(21 citation statements)

References 27 publications

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“…As the core component of the micro-fluid control system, the output performance of the micro pump determines the characteristics of the entire system. According to different driving methods, micro pumps can be divided into electromagnetic pumps (Mi et al, 2020;Rusli et al, 2018) heat pumps (Feng et al, 2021;Skye and Wu, 2021), pneumatic pumps (Hamid et al, 2017;Ma et al, 2019), shape memory pumps (Robertson et al, 2016) and piezoelectric pumps (Huang et al, 2020;Ma et al, 2016;Ma et al, 2015). Among them, piezoelectric pumps have attracted more and more attention for their outstanding advantages such as high energy density, fast response speed, large driving force, and easy integration.…”

Section: Introductionmentioning

confidence: 99%

Entropy Analysis of a Valveless Piezoelectric Pump With Hyperbolic Tubes

Yang

2022

Front. Energy Res.

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In order to solve the problems of large reflux and low output performance of the valveless piezoelectric pump with conical tubes, the valveless piezoelectric pump with hyperbolic tubes was proposed. However, the previous research only paid attention to the difference of forward and reverse flow resistance inside the tubes. For this reason, the prototypes of conical tube valveless piezoelectric pump and hyperbolic tubes valveless piezoelectric pump were fabricated in this paper. The maximum output flow rate of the valveless piezoelectric pump with hyperbolic tubes was 54 ml/min. Subsequently, the size and position of entropy production of the hyperbolic tube and the conical tube were numerically calculated based on entropy production theory in this paper. The results show that the entropy production rate of the hyperbolic tube was significantly lower than that of the conical tube, which is consistent with the experimental results. This research analyzed the energy loss inside the valveless piezoelectric pump by using the entropy generation theory, and provided a new design and research method for improving the output performance of the valveless piezoelectric pump in the future.

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Section: Introductionmentioning

confidence: 99%

Entropy Analysis of a Valveless Piezoelectric Pump With Hyperbolic Tubes

Yang

2022

Front. Energy Res.

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“…Biomedical and chemical processes often require small amounts of bio-chemical substances, including cell and microparticle suspensions, to be moved around at the micro scale with great precision. 1,2 There are various mechanisms that have been developed towards this objective, sometimes employing physical principles of piezoelectricity in combination with a diaphragm, 3 electrostatic 4 and electromagnetic 5 forces, thermal actuation, 6 bubble expansion and collapse, 7 electrowetting, 8 and acoustics, [9][10][11][12][13][14][15] among others.…”

Section: Introductionmentioning

confidence: 99%

Sharp-edge-based acoustofluidic chip for programmable pumping, mixing, cell focusing and trapping

Pavlic¹,

Harshbarger²,

Rosenthaler³

et al. 2022

Preprint

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Precise manipulation of fluids and objects on the micro scale is seldom a simple task, but nevertheless crucial for many applications in life sciences and chemical engineering. We present a microfluidic chip fabricated in silicon-glass, featuring one or several pairs of acoustically excited sharp edges at side channels that drive a pumping flow throughout the chip and produce a strong mixing flow in their vicinity. The chip is simultaneously capable of focusing cells and microparticles that are suspended in the flow. The multifunctional micropump provides a continuous flow across a wide range of excitation frequencies (80 kHz − 2 MHz), with flow rates ranging from nL min −1 to µL min −1 , depending on the excitation parameters. In the low-voltage regime, the flow rate depends quadratically on the voltage applied to the piezoelectric transducer, making the pump programmable. The behaviour in the system is elucidated with finite element method simulations, which are in good agreement with experimentally observed behaviour. The acoustic radiation force arising due to a fluidic channel resonance is responsible for the focusing of cells and microparticles, while the streaming produced by the pair of sharp edges generates the pumping and the mixing flow. If cell focusing is detrimental for a certain application, it can also be avoided by exciting the system away from the resonance frequency of the fluidic channel. The device, with its unique bundle of functionalities, displays great potential for various bio-chemical applications.

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“…Nonetheless, the current established sensor, which is usually fabricated on a rigid platform, is not suitable for the wavy surface of human skin, and it often causes low-quality signals and creates discomfort for the users. Recent advances in flexible technology can possibly alleviate this constraint by fabricating the sensor in a thin form factor [7][8][9] or using soft elastomer [10][11][12][13][14][15] as the constructive material to promote conformal contact between the sensor and the skin. For instance, a skin patch sensor is fabricated by integrating a strain gauge with a soft elastomer to provide a piezoresistive and capacitive output against laryngeal movement during swallowing [16].…”

Section: Introductionmentioning

confidence: 99%

Artificial Intelligence-Assisted Throat Sensor Using Ionic Polymer–Metal Composite (IPMC) Material

et al. 2021

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Throat sensing has received increasing demands in recent years, especially for oropharyngeal treatment applications. The conventional videofluoroscopy (VFS) approach is limited by either exposing the patient to radiation or incurring expensive costs on sophisticated equipment as well as well-trained speech-language pathologists. Here, we propose a smart and non-invasive throat sensor that can be fabricated using an ionic polymer–metal composite (IPMC) material. Through the cation’s movement inside the IPMC material, the sensor can detect muscle movement at the throat using a self-generated signal. We have further improved the output responses of the sensor by coating it with a corrosive-resistant gold material. A support vector machine algorithm is used to train the sensor in recognizing the pattern of the throat movements, with a high accuracy of 95%. Our proposed throat sensor has revealed its potential to be used as a promising solution for smart healthcare devices, which can benefit many practical applications such as human–machine interactions, sports training, and rehabilitation.

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Electromagnetic actuation dual-chamber bidirectional flow micropump

Cited by 49 publications

References 27 publications

Entropy Analysis of a Valveless Piezoelectric Pump With Hyperbolic Tubes

Entropy Analysis of a Valveless Piezoelectric Pump With Hyperbolic Tubes

Sharp-edge-based acoustofluidic chip for programmable pumping, mixing, cell focusing and trapping

Artificial Intelligence-Assisted Throat Sensor Using Ionic Polymer–Metal Composite (IPMC) Material

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