Capacitive Sensor and Alternating Drive Mixing for Microfluidic Applications Using Micro Diaphragm Pumps

Thalhofer, Thomas; Keck, Mauro; Kibler, S.; Hayden, Oliver

doi:10.3390/s22031273

Cited by 8 publications

(6 citation statements)

References 23 publications

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“…In point-of-care analysis, advancements such as 3D miniaturized magnetic-driven glass centrifugal pumps improve portability and performance. Micropumps are used in medicine, biology, and pharmacy for precise dosing and mixing of small volumes with high accuracy and reliability (Thalhofer et al 2022). Many actuation techniques are used in creating micropumps, including shapememory alloys, electrostatic, piezoelectric, and electromagnetic devices.…”

Section: Introductionmentioning

confidence: 99%

Computational analysis of a four-flap valveless micropump (FFVM) for low reynolds number applications in microfluidic systems

Gavali,

Pawar

2024

Phys. Scr.

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Microfluidic systems are crucial in various fields including biological fluid handling and microelectronic cooling. Micropumps play a vital role in microfluidics. Valveless micropumps are the preferred choice in microfluidics because of their ability to minimize the risk of clogging and gently handle biological materials. In this comprehensive Four-Flap Valveless Micropump (FFVM) simulation, the fluid flow and associated deformation in the valveless micropump are analyzed. The oscillatory fluid motion generated by a straightforward reciprocating pumping mechanism is transformed into a unidirectional net flow by the micropump. This pump eliminates the need for intricate actuation mechanisms found in valve-based pumps while offering precise direction control. The input is given in terms of the Reynolds number or inflow velocity. In this study, the Reynolds numbers were changed from 16 to 50, which resulted in a positive correlation with the net flow rates, yielding a maximum net flow rate of 20.81 µl /min at a Reynolds number of 50. The influence of the average flow velocity is evident, with a peak net flow rate of 29.16 µl/min at 50 cm/sec. The FFVM showcases adaptability by delivering fluid within microfluidic pathways, holding promising applications in precision drug delivery systems

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Section: Introductionmentioning

confidence: 99%

Computational analysis of a four-flap valveless micropump (FFVM) for low reynolds number applications in microfluidic systems

Gavali,

Pawar

2024

Phys. Scr.

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“…Diaphragm pumps are critical equipment widely used in the chemical, pharmaceutical, and food industries, and their reliable operation is crucial for production safety and efficiency [1]. However, due to the complexity of their working environment and the characteristics of the equipment itself, diaphragm pumps are prone to failures [2]. Failure to promptly detect and diagnose these faults may lead to severe economic losses or even safety accidents [3].…”

Section: Introductionmentioning

confidence: 99%

The DMF: Fault Diagnosis of Diaphragm Pumps Based on Deep Learning and Multi-Source Information Fusion

Meng,

Shi,

Song

2024

Processes

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Effective fault diagnosis for diaphragm pumps is crucial. This paper proposes a diaphragm pump fault diagnosis method based on deep learning and multi-source information fusion (DMF). The time-domain features, frequency-domain features, and modulation features are extracted from the vibration signals from eight different positions. After feature enhancement and data preprocessing, the features are input into auto encoders (AE), convolutional neural networks (CNN), and support vector machines (SVM) to obtain the diagnostic results. The results indicate that the DMF method achieves a fault diagnosis accuracy of 99.98%, which is on average 9.09% higher than using a single diagnostic model. The demodulation method is more suitable for vibration signal feature extraction of the diaphragm pump, while the CNN is more suitable for identification of diaphragm pump faults. Specifically, it outperformed the sampling point 1-DPCA-AE model by 13.98% and the sampling point 4-DPCA-SVM model by 8.98%.

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“…Electromagnetic diaphragm pump is a type of diaphragm pump [1][2][3][4][5] that has quite a few advantages, such as simple structure and excellent sealing performance. Recent years have seen rapid development of the electromagnetic diaphragm pump.…”

Section: Introductionmentioning

confidence: 99%

Electromagnetic force investigation of electromagnets with variable pole area in an electromagnetic diaphragm pump

Liao,

Liu,

Xing

et al. 2023

PLoS ONE

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Electromagnetic diaphragm pump is a kind of widely applied diaphragm pump that has promising sealing performance, simple structure and low power loss. Planar pole electromagnet is a significant component of the electromagnetic diaphragm pump. However, the sharply changing displacement-force characteristics of the planar pole electromagnet do not match the constant load characteristics of the electromagnetic diaphragm pump. Herein, an electromagnet with variable pole area is put forward. A theoretical relationship between structural parameters, the Ampere turns and the electromagnetic force of the electromagnet with variable pole area is determined by analyzing the equivalent magnetic circuit of the electromagnet with variable pole area. The experimental results imply that the initial electromagnetic force of the electromagnet with variable pole area is 32.51% larger than the planar pole electromagnet, the engaging electromagnetic force of the electromagnet with variable pole area is 22.3% smaller than the planar pole electromagnet and the displacement-force characteristics of the electromagnet with variable pole area match the constant load characteristics of the electromagnetic diaphragm pump.

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Capacitive Sensor and Alternating Drive Mixing for Microfluidic Applications Using Micro Diaphragm Pumps

Cited by 8 publications

References 23 publications

Computational analysis of a four-flap valveless micropump (FFVM) for low reynolds number applications in microfluidic systems

Computational analysis of a four-flap valveless micropump (FFVM) for low reynolds number applications in microfluidic systems

The DMF: Fault Diagnosis of Diaphragm Pumps Based on Deep Learning and Multi-Source Information Fusion

Electromagnetic force investigation of electromagnets with variable pole area in an electromagnetic diaphragm pump

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