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Flexible micro flow sensor for micro aerial vehicles
Rong ZHU, Ruiyi QUE, Peng LIU
《机械工程前沿(英文)》 2017年 第12卷 第4期 页码 539-545 doi: 10.1007/s11465-017-0427-0
This article summarizes our studies on micro flow sensors fabricated on a flexible polyimide circuit board by a low-cost hybrid process of thin-film deposition and circuit printing. The micro flow sensor has merits of flexibility, structural simplicity, easy integrability with circuits, and good sensing performance. The sensor, which adheres to an object surface, can detect the surface flow around the object. In our study, we install the fabricated micro flow sensors on micro aerial vehicles (MAVs) to detect the surface flow variation around the aircraft wing and deduce the aerodynamic parameters of the MAVs in flight. Wind tunnel experiments using the sensors integrated with the MAVs are also conducted.
关键词: micro flow sensor flexible sensor surface flow sensing aerodynamic parameter micro aerial vehicle (MAV)
《机械工程前沿(英文)》 2023年 第18卷 第2期 doi: 10.1007/s11465-023-0747-1
关键词: micro-electro-mechanical system capacitive sensor bionics operation instability mechanical and electrical decoupling biomedical force measurement
Liang ZHAO, Linhua LIU,
《能源前沿(英文)》 2009年 第3卷 第4期 页码 381-388 doi: 10.1007/s11708-009-0057-2
关键词: closed-end micro-channel electrical double layer electro-osmotic flow induced pressure gradient Joule heating
Burnett simulations of gas flow and heat transfer in microchannels
Fubing BAO, Jianzhong LIN
《机械工程前沿(英文)》 2009年 第4卷 第3期 页码 252-263 doi: 10.1007/s11465-009-0037-6
关键词: micro- and nanoscale gas flow slip-transition flow regime Burnett equations numerical simulation
A. DAVOUDINEJAD, P. PARENTI, M. ANNONI
《机械工程前沿(英文)》 2017年 第12卷 第2期 页码 203-214 doi: 10.1007/s11465-017-0421-6
Predictive models for machining operations have been significantly improved through numerous methods in recent decades. This study proposed a 3D finite element modeling (3D FEM) approach for the micro end-milling of Al6061-T6. Finite element (FE) simulations were performed under different cutting conditions to obtain realistic numerical predictions of chip flow, burr formation, and cutting forces. FE modeling displayed notable advantages, such as capability to easily handle any type of tool geometry and any side effect on chip formation, including thermal aspect and material property changes. The proposed 3D FE model considers the effects of mill helix angle and cutting edge radius on the chip. The prediction capability of the FE model was validated by comparing numerical model and experimental test results. Burr dimension trends were correlated with force profile shapes. However, the FE predictions overestimated the real force magnitude. This overestimation indicates that the model requires further development.
关键词: 3D finite element modeling micro end-milling cutting force chip formation burr formation
Impact force detection using an energy flow estimator with piezoelectric sensors
Xingjun WANG, Daniel GUYOMAR, Kaori YUSE, Mickaël LALLART, Lionel PETIT,
《机械工程前沿(英文)》 2010年 第5卷 第2期 页码 194-203 doi: 10.1007/s11465-010-0004-2
关键词: impact detection energy flow piezoelectric sensor thin plate
张炳雷,徐进良,肖泽军
《中国工程科学》 2007年 第9卷 第12期 页码 86-93
赵玉龙,牛 喆,周冠武,赵立波,蒋庄德
《中国工程科学》 2013年 第15卷 第1期 页码 99-105
针对油气田特殊环境要求,介绍了一种高温高压传感器芯片的设计及加工制造方法,并研发了相关的高性能数字变送系统。所设计的高温高压传感器芯片解决了传统压阻式传感器在高温高压环境下的热稳定性问题,通过数字补偿技术进一步提升了其系统的线性度与精度,并针对油气田监测环境扩展了其相关外围设备。同时,为了适应油气田管监测理要求,设计了相关无线传感网络,以确保其工业生产的高效运行和有效控制。通过具体实验测试数据,验证了该油气田监测高性能微传感器及数字化系统的高精度及高可靠性,该系统的精度达到0.2 % FS及以上,达到世界先进水平,对国内的石化工业发展有着非常重要的意义。
Biomedical sensor technologies on the platform of mobile phones
Lin LIU, Jing LIU
《机械工程前沿(英文)》 2011年 第6卷 第2期 页码 160-175 doi: 10.1007/s11465-011-0216-0
Biomedical sensors have been widely used in various areas of biomedical practices, which play an important role in disease detection, diagnosis, monitoring, treatment, health management, and so on. However, most of them and their related platforms are generally not easily accessible or just too expensive or complicated to be kept at home. As an alternative, new technologies enabled from the mobile phones are gradually changing such situations. As can be freely available to almost everyone, mobile phone offers a unique way to improve the conventional medical care through combining with various biomedical sensors. Moreover, the established systems will be both convenient and low cost. In this paper, we present an overview on the state-of-art biomedical sensors, giving a brief introduction of the fundamental principles and showing several new examples or concepts in the area. The focus was particularly put on interpreting the technical strategies to innovate the biomedical sensor technologies based on the platform of mobile phones. Some challenging issues, including feasibility, usability, security, and effectiveness, were discussed. With the help of electrical and mechanical technologies, it is expected that a full combination between the biomedical sensors and mobile phones will bring a bright future for the coming pervasive medical care.
关键词: biomedical sensor pervasive technology mobile phone combined system health management
静电力驱动的悬臂梁微型电场传感器件 Article
韩志飞, 胡军, 李立浧, 何金良
《工程(英文)》 2023年 第24卷 第5期 页码 184-191 doi: 10.1016/j.eng.2022.06.017
随着智能电网和能源互联网的发展,大规模实时电压/电场监测成为电力系统的迫切需求,这依赖于先进传感器件的大规模布置。电场测量在电力系统中具有重要意义。一方面,基于电场测量的电压反演可以实现高电压的非接触式测量,替代传统高压互感器,从而减少测量设备绝缘成本和安装难度;另一方面,电场测量还可以被应用于设备故障诊断、雷电预警、电磁环境测量等应用场景。传统的电场测量设备,如场磨等,往往体积大、成本高,无法大规模灵活布置。本文提出了一种静电力驱动的压阻式微型电场传感器。传感器被设计为四悬臂结构,悬臂在静电力的驱动下产生位移和应变,通过压阻材料转化为可测信
号。所提出的传感器具有尺寸小、成本低、功耗低、易于批量生产的优点。同时,该传感器还具有高信噪比、高分辨率及宽电场测量范围的特点。实验结果表明,所提出的传感器具有1.1~1100.0 kV·m−1的线性测量范围、112 V·m−1·Hz−1/2的交流电场分辨率以及496 Hz的截止频率。这一微型电场传感器将在智能电网及能源互联网中具有广泛的应用价值。
Development and testing of a wireless smart toolholder with multi-sensor fusion
《机械工程前沿(英文)》 2023年 第18卷 第4期 doi: 10.1007/s11465-023-0774-y
关键词: wireless smart toolholder multi-sensor fusion circular runout dynamic balancing static stiffness dynamic inherent frequency
Fault diagnosis of axial piston pumps with multi-sensor data and convolutional neural network
《机械工程前沿(英文)》 2022年 第17卷 第3期 doi: 10.1007/s11465-022-0692-4
关键词: axial piston pump fault diagnosis convolutional neural network multi-sensor data fusion
Dependence of error sensitivity of frequency on bias voltage in force-balanced micro accelerometer
Lili CHEN, Wu ZHOU
《机械工程前沿(英文)》 2013年 第8卷 第2期 页码 146-149 doi: 10.1007/s11465-013-0260-z
To predict more precisely the frequency of force-balanced micro accelerometer with different bias voltages, the effects of bias voltages on error sensitivity of frequency is studied. The resonance frequency of accelerometer under closed loop control is derived according to its operation principle, and its error sensitivity is derived and analyzed under over etching structure according to the characteristics of Deep Reaction Ion Etching (DRIE). Based on the theoretical results, micro accelerometer is fabricated and tested to study the influences of AC bias voltage and DC bias voltage on sensitivity, respectively. Experimental results indicate that the relative errors between test data and theory data are less than 7%, and the fluctuating value of error sensitivity under the range of voltage adjustment is less than 0.01 μm . It is concluded that the error sensitivity with designed parameters of structure, circuit and process error can be used to predict the frequency of accelerometer with no need to consider the influence of bias voltage.
关键词: Micro-Electro-Mechanical Systems (MEMS) micro accelerometer force-balanced micro accelerometer frequency error sensitivity
Reduced texaphyrin: A ratiometric optical sensor for heavy metals in aqueous solution
Harrison D. Root, Gregory Thiabaud, Jonathan L. Sessler
《化学科学与工程前沿(英文)》 2020年 第14卷 第1期 页码 19-27 doi: 10.1007/s11705-019-1888-y
关键词: texaphyrin fluorescent sensor ion-sensing indium mercury
Numerical simulation of micro scale flowing and boiling
Wen WANG, Rui ZHUAN,
《能源前沿(英文)》 2009年 第3卷 第4期 页码 396-401 doi: 10.1007/s11708-009-0049-2
关键词: volume-of-fluid (VOF) micro channel nucleate boiling bubble dynamics simulation
标题 作者 时间 类型 操作
A bionic approach for the mechanical and electrical decoupling of an MEMS capacitive sensor in ultralow
期刊论文
Effect of Joule heating on electro-osmotic flow in a closed-end micro-channel with isothermal and convective
Liang ZHAO, Linhua LIU,
期刊论文
3D finite element prediction of chip flow, burr formation, and cutting forces in micro end-milling of
A. DAVOUDINEJAD, P. PARENTI, M. ANNONI
期刊论文
Impact force detection using an energy flow estimator with piezoelectric sensors
Xingjun WANG, Daniel GUYOMAR, Kaori YUSE, Mickaël LALLART, Lionel PETIT,
期刊论文
Dependence of error sensitivity of frequency on bias voltage in force-balanced micro accelerometer
Lili CHEN, Wu ZHOU
期刊论文
Reduced texaphyrin: A ratiometric optical sensor for heavy metals in aqueous solution
Harrison D. Root, Gregory Thiabaud, Jonathan L. Sessler
期刊论文