Micromachines最新文献_第8页

Research on Valveless Piezoelectric Pump Based on Coriolis Effect. 基于科里奥利效应的无阀电压泵研究。

IF 3 3区工程技术

Micromachines Pub Date : 2025-04-29 DOI: 10.3390/mi16050527

Qiufeng Yan, Zhiling Liu, Wanting Sun, Mengyao Jiang

{"title":"Research on Valveless Piezoelectric Pump Based on Coriolis Effect.","authors":"Qiufeng Yan, Zhiling Liu, Wanting Sun, Mengyao Jiang","doi":"10.3390/mi16050527","DOIUrl":"10.3390/mi16050527","url":null,"abstract":"In previous studies, a valveless piezoelectric pump with arc-shaped tubes (VPPAST) based on the Coriolis Effect was proposed. To promote the application of VPPAST in the field of navigation and guidance, it is vital to further explore the influences of the layout and structural parameters of arc-shaped tubes on the flow rate. Accordingly, in this study, the analysis of flow characteristics of fluid in arc-shaped tubes was conducted, and the velocity difference between the clockwise and counterclockwise flow of the liquid was reduced. Eventually, the flow equations of three layout modes of arc-shaped tubes were established. VPPAST with anomalous-direction arc-shaped tubes, single-arc-shaped tube, and same-direction arc-shaped tubes were produced using 3D printing technology. In addition, the valveless piezoelectric pump with the anomalous-direction arc-shaped tubes (VLPPADA) with different parameter flow tubes were also fabricated. Based on the resultant flow rates of each piezoelectric pump, it was demonstrated that the flow rate of the VLPPADA was the highest under the same driving conditions, and the flow rate can be determined as 1.72 mL/min when the driving voltage was set as 160 V at 14 Hz. It indicated that the pump flow rate of VLPPADA was directly proportional to the base radius and width of the arc-shaped tube.","PeriodicalId":18508,"journal":{"name":"Micromachines","volume":"16 5","pages":""},"PeriodicalIF":3.0,"publicationDate":"2025-04-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12113604/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144160065","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Enhancement of Quality Factors in a 6.5 GHz Resonator Using Mo/SiC Composite Microstructures. 利用Mo/SiC复合微结构增强6.5 GHz谐振腔的品质因子。

IF 3 3区工程技术

Micromachines Pub Date : 2025-04-29 DOI: 10.3390/mi16050529

Binghui Lin, Yupeng Zheng, Haiyang Li, Yuqi Ren, Tingting Yang, Zekai Wang, Yao Cai, Qinwen Xu, Chengliang Sun

{"title":"Enhancement of Quality Factors in a 6.5 GHz Resonator Using Mo/SiC Composite Microstructures.","authors":"Binghui Lin, Yupeng Zheng, Haiyang Li, Yuqi Ren, Tingting Yang, Zekai Wang, Yao Cai, Qinwen Xu, Chengliang Sun","doi":"10.3390/mi16050529","DOIUrl":"10.3390/mi16050529","url":null,"abstract":"This study addresses the critical challenge of lateral acoustic wave energy leakage in high-frequency film bulk acoustic resonators (FBARs) and elucidates the reflection mechanism of acoustic waves at acoustic reflection boundaries. Based on the theory of acoustic impedance mismatch, a novel Mo/SiC composite microstructure is designed to strategically establish multiple acoustic reflection boundaries along the lateral acoustic wave leakage paths. Finite element simulations reveal that SiC microstructures effectively suppress vibration amplitudes in non-resonant regions, thereby preventing acoustic wave leakage. By integrating Mo and SiC microstructures, the proposed composite structure significantly enhances the resonator's acoustic confinement and energy retention capabilities. A resonator incorporating this Mo/SiC composite microstructure is fabricated, achieving a series resonance frequency of 6.488 GHz and a remarkable quality factor (Q) of 310. This represents a substantial 51.2% improvement in Q compared to the basic FBAR, confirming the effectiveness of the proposed design in mitigating lateral acoustic wave leakage and enhancing resonator performance for high-frequency, low-loss applications. This work offers valuable insights into the design of next-generation RF resonators for advanced wireless communication systems.","PeriodicalId":18508,"journal":{"name":"Micromachines","volume":"16 5","pages":""},"PeriodicalIF":3.0,"publicationDate":"2025-04-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12113843/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144160011","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A High-Isolation Optically Transparent 2 × 2 Antenna Array Using Metal Mesh Material. 一种采用金属网格材料的高隔离透明2 × 2天线阵列。

IF 3 3区工程技术

Micromachines Pub Date : 2025-04-29 DOI: 10.3390/mi16050528

Yufeng Yu, Yuanjia Dong, Yangyang He, Yi-Feng Cheng

引用次数: 0

Heat Transfer Enhancement of Diamond Rib Mounted in Periodic Merging Chambers of Micro Channel Heat Sink. 安装在微通道散热器周期性合并室中的金刚石肋片强化传热。

IF 3 3区工程技术

Micromachines Pub Date : 2025-04-29 DOI: 10.3390/mi16050533

Xin Lu, Lu Wang, Liangbi Wang, Yao Hu

引用次数: 0

Influence of Inner Lining Atoms of Multilayered Hexagonal Boron Nitride Porous Membrane on Desalination. 多层六方氮化硼多孔膜内衬原子对海水淡化的影响。

IF 3 3区工程技术

Micromachines Pub Date : 2025-04-29 DOI: 10.3390/mi16050530

Chulwoo Park, Daejoong Kim

引用次数: 0

PDMS SlipChip: Optimizing Sealing, Slipping, and Biocompatibility Using Low-Viscosity Silicone Oils. PDMS滑片：使用低粘度硅油优化密封，滑动和生物相容性。

IF 3 3区工程技术

Micromachines Pub Date : 2025-04-29 DOI: 10.3390/mi16050525

Rafia Inaam, Marcela F Bolontrade, Shunya Okamoto, Takayuki Shibata, Tuhin Subhra Santra, Moeto Nagai

{"title":"PDMS SlipChip: Optimizing Sealing, Slipping, and Biocompatibility Using Low-Viscosity Silicone Oils.","authors":"Rafia Inaam, Marcela F Bolontrade, Shunya Okamoto, Takayuki Shibata, Tuhin Subhra Santra, Moeto Nagai","doi":"10.3390/mi16050525","DOIUrl":"10.3390/mi16050525","url":null,"abstract":"The Polydimethylsiloxane (PDMS) SlipChip is a microfluidic platform enabling fluid manipulation without pumps or valves, simplifying operation and reducing reagent use. High-viscosity silicone oils (e.g., 5000-10,000 cSt) improve sealing but frequently block microfluidic channels, reducing usability. In contrast, low-viscosity oils (50-100 cSt) reduce blockages but may compromise sealing. This study addresses these challenges by optimizing the viscosity of silicone oil and the curing conditions of PDMS. Low-viscosity silicone oil (50 cSt) was identified as optimal, ensuring smooth slipping and reliable sealing without blockages. Curing conditions were also adjusted to balance adhesion and stiffness as follows: lower temperatures (50-60 °C) enhanced van der Waals adhesion, while higher temperatures (80 °C) increased stiffness. A mixed curing approach (80 °C for the top layer and 60 °C for the bottom layer) further improved performance. Biocompatibility testing using human osteosarcoma cells demonstrated minimal cytotoxicity with 50 cSt oil, supporting cell viability (95%) comparable to traditional multiwell plates. These findings provide practical guidelines for fabricating reliable and biocompatible SlipChips.","PeriodicalId":18508,"journal":{"name":"Micromachines","volume":"16 5","pages":""},"PeriodicalIF":3.0,"publicationDate":"2025-04-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12114323/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144159763","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Startup Drift Compensation of MEMS INS Based on PSO-GRNN Network. 基于PSO-GRNN网络的MEMS INS启动漂移补偿。

IF 3 3区工程技术

Micromachines Pub Date : 2025-04-29 DOI: 10.3390/mi16050524

Songlai Han, Jingyi Xie, Jing Dong

{"title":"Startup Drift Compensation of MEMS INS Based on PSO-GRNN Network.","authors":"Songlai Han, Jingyi Xie, Jing Dong","doi":"10.3390/mi16050524","DOIUrl":"10.3390/mi16050524","url":null,"abstract":"The startup drift phenomenon that exists in MEMS INSs increases the navigation error, prolonging the start-up time. Aiming to resolve this problem, a startup drift compensation method based on a PSO-GRNN model is proposed in this paper. We adopted a correlation analysis to determine the input parameters of the PSO-GRNN model that mainly affect startup drift. In the process of training this model, we used the PSO algorithm to optimize the spread parameter of the PSO-GRNN model. The information transmission function between particle swarms was used to find the best spread parameter by iterative optimization, the particle's position was mapped to the GRNN model, and the GRNN model was constructed with the optimal position of the swarm as the spread parameter. This method can effectively compensate for startup drift and improve navigation accuracy. Startup drift compensation experiments were carried out at different ambient temperatures. Compared with the MEMS INS data without compensation, the standard deviation of the MEMS INS data with the proposed method decreased by more than 80.6%, and the peak-to-peak value of the MEMS INS data decreased by over 72.7%. Compared with the traditional method, the standard deviation of the MEMS INS data compensated via this method decreased by 54.5% on average, and the peak-to-peak value decreased by 42.8% on average. Meanwhile, the performance of this method was verified by navigation experiments. With the proposed method, the speed error improved by over 36.4%, and the position error improved by over 41.1%. The above experiments verified that the method of this paper significantly improved navigation performance.","PeriodicalId":18508,"journal":{"name":"Micromachines","volume":"16 5","pages":""},"PeriodicalIF":3.0,"publicationDate":"2025-04-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12114331/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144160108","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Detection of Positive and Negative Pressure in a Double-Chamber Underwater Thruster. 双腔水下推力器正负压的检测。

IF 3 3区工程技术

Micromachines Pub Date : 2025-04-29 DOI: 10.3390/mi16050526

Chong Cao, Chengchun Zhang, Chun Shen, Yasong Zhang, Wen Cheng, Zhengyang Wu, Luquan Ren

{"title":"Detection of Positive and Negative Pressure in a Double-Chamber Underwater Thruster.","authors":"Chong Cao, Chengchun Zhang, Chun Shen, Yasong Zhang, Wen Cheng, Zhengyang Wu, Luquan Ren","doi":"10.3390/mi16050526","DOIUrl":"10.3390/mi16050526","url":null,"abstract":"The aim of this paper is to develop a compact, rapid-response pressure sensor for underwater propulsion. Flexible pressure sensors are widely utilized in human-computer interactions and wearable electronic devices; however, manufacturing capacitive sensors that offer a broad pressure range and high sensitivity presents significant challenges. Inspired by the dermal papillary microstructure, a capacitive pressure sensor was prepared by infusing polydimethylsiloxane (PDMS) inside an anodic aluminum oxide (AAO) template and then demolding it. The resulting pressure sensor exhibits several key characteristics: high linearity in the range of -5.2 to 6.3 kPa, a comprehensive range for both positive and negative pressure sensing in air or water environments, a quick response time of 52 ms, a recovery time of 40 ms, and excellent stability. The sensor presented in this work is innovatively applied to detect underwater negative pressure, and it is employed for the swift detection of positive and negative pressure changes in underwater thrusters. This work highlights the promising potential of biomimetic flexible capacitive pressure sensors across various applications.","PeriodicalId":18508,"journal":{"name":"Micromachines","volume":"16 5","pages":""},"PeriodicalIF":3.0,"publicationDate":"2025-04-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12113808/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144159968","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Current-Carrying Wear Behavior of the Laser-Alloyed Al/W Composite Layer Under Different Currents. 不同电流下激光合金Al/W复合材料层载流磨损行为

IF 3 3区工程技术

Micromachines Pub Date : 2025-04-29 DOI: 10.3390/mi16050523

Heng Zhang, Bai Li, Yulong Zhu, Congwen Tang, Pengfei Sun, Tao Lai, Dengzhi Wang

{"title":"Current-Carrying Wear Behavior of the Laser-Alloyed Al/W Composite Layer Under Different Currents.","authors":"Heng Zhang, Bai Li, Yulong Zhu, Congwen Tang, Pengfei Sun, Tao Lai, Dengzhi Wang","doi":"10.3390/mi16050523","DOIUrl":"10.3390/mi16050523","url":null,"abstract":"The Al/W composite layer was fabricated on the surface of the aluminum alloy using laser alloying technology to enhance the current-carrying wear resistance. Additionally, the current-carrying wear behaviors of the Al/W composite layer and the aluminum alloy substrate were investigated under different currents. The results indicate that the presence of hard phases such as W and Al4W in the composite layer significantly enhanced the wear resistance of the material. Specifically, the average friction coefficient of the Al/W composite layer under different currents was reduced by approximately 9.3-35.8% compared to the aluminum alloy substrate, and the wear rate under current-carrying conditions decreased by about 1.9-6.0 times. For the aluminum alloy substrate, adhesive wear is the dominant mechanism under currents ranging from 0 to 60 A. However, as the current increased to 80 A, the severity of arc erosion intensified, and the wear mechanism transitioned to a combination of arc erosion and adhesive wear. In contrast, for the Al/W composite layer, abrasive wear was the dominant wear mechanism in the absence of electrical current. Upon the introduction of the current, the wear mechanism changed to a coupling effect of arc erosion and adhesive wear.","PeriodicalId":18508,"journal":{"name":"Micromachines","volume":"16 5","pages":""},"PeriodicalIF":3.0,"publicationDate":"2025-04-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12113620/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144159866","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Design and Implementation of a High-Throughput Digital Microfluidic System Based on Optimized YOLOv8 Object Detection. 基于优化YOLOv8目标检测的高通量数字微流控系统设计与实现

IF 3 3区工程技术

Micromachines Pub Date : 2025-04-28 DOI: 10.3390/mi16050521

Ming Cao, Wufeng Duan, Zuwei Huang, Huihong Liang, Fanrong Ai, Xianming Liu

{"title":"Design and Implementation of a High-Throughput Digital Microfluidic System Based on Optimized YOLOv8 Object Detection.","authors":"Ming Cao, Wufeng Duan, Zuwei Huang, Huihong Liang, Fanrong Ai, Xianming Liu","doi":"10.3390/mi16050521","DOIUrl":"10.3390/mi16050521","url":null,"abstract":"To address the challenges of excessive control pins and inefficient high-throughput droplet manipulation in conventional digital microfluidic chips, this study developed a parallel-motion digital microfluidic system integrated with an image acquisition device. The system employs an enhanced YOLOv8 object detection model for droplet recognition. By enabling parallel droplet transportation and processing, it significantly improves operational efficiency and detection accuracy. For droplet recognition, the YOLOv8 model was optimized through the integration of GAM_Attention and EMA mechanisms, which strengthen feature extraction capabilities and detection performance. Experimental results demonstrated that the optimized model achieves remarkable accuracy and robustness in droplet detection tasks, with mAP50 increasing from 96.5% to 98.7% and mAP50-90 improving from 65.8% to 68.5%. The system exhibits enhanced detection precision and real-time responsiveness, maintaining an error rate below 0.53%. Furthermore, a host computer interface was implemented for multi-droplet path planning and feedback, establishing a closed-loop control system. This work provides an efficient and reliable solution for high-throughput operations in microfluidic chip applications.","PeriodicalId":18508,"journal":{"name":"Micromachines","volume":"16 5","pages":""},"PeriodicalIF":3.0,"publicationDate":"2025-04-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12113485/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144159962","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0