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2013 Transducers & Eurosensors XXVII: The 17th International Conference on Solid-State Sensors, Actuators and Microsystems (TRANSDUCERS & EUROSENSORS XXVII)最新文献

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Anti-electromagnetic interference and calibration schemes of flexible current sensor tag for reliable current detection in household appliance 家用电器中可靠电流检测的柔性电流传感器标签抗电磁干扰及标定方案
Y. C. Chen, W. Hsu, S. H. Cheng, Y. T. Cheng
The paper presents both anti-inference packaging and effective calibration schemes for accurate current detection in household appliance using flexible current tags. The sensor with NiFe C-clamp stripes can effectively prevent electromagnetic interference (EMI) effect and reduce the measurement error down to less than 2%, while the external current source is placed 1cm away from the power cord to be detected. Meanwhile, an effective calibration scheme using two sensor coils with a designated separation is proposed and experimentally validated for accurate current detection based on a quadratic polynomial approximation.
针对家用电器中使用柔性电流标签进行准确的电流检测,提出了抗干扰封装和有效的校准方案。带有NiFe C-clamp条纹的传感器可以有效地防止电磁干扰(EMI)效应,将测量误差降低到2%以下,而外部电流源放置在距离被检测电源线1cm的地方。同时,提出了一种有效的基于二次多项式近似的两个传感器线圈指定间隔的校准方案,并进行了实验验证。
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引用次数: 5
Biomedical micro and nanotechnology: From lab-on-chip to building systems with cells 微生物医学和纳米技术:从芯片实验室到细胞构建系统
U. Hassan, P. Bajaj, G. Damhorst, R. Bashir
Biomedical applications of micro and nanotechnology hold tremendous promise in diagnostics, therapeutic, and tissue engineering. Lab on chip devices can be used for the rapid and sensitive detection of biological entities including cells, bacteria, proteins and DNA. These microfluidic devices can provide for the sensitive and selective detection of CD4+ T cells for detection of HIV/AIDs for global health at point of care. Significant opportunities exist for rapid point-of-care detection of nucleic acid molecules from bacterial or viral agents of infection, for food borne pathogens. Tremendous opportunities exist in the development of cell-based bio-actuators, autonomous biological micro robots and cellular machines for a wide range of applications.
微纳米技术在生物医学上的应用在诊断、治疗和组织工程方面有着巨大的前景。芯片实验室设备可用于快速、灵敏地检测生物实体,包括细胞、细菌、蛋白质和DNA。这些微流控装置可以提供CD4+ T细胞的敏感和选择性检测,用于在护理点检测艾滋病毒/艾滋病。对于食源性病原体,存在着对细菌或病毒感染源的核酸分子进行即时快速检测的重要机会。基于细胞的生物致动器、自主生物微机器人和细胞机器具有广阔的应用前景。
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引用次数: 8
High sensitive mass detection in liquid using a piezoelectric GaAs membrane 利用压电砷化镓膜对液体进行高灵敏度质量检测
A. Bienaimé, C. Élie-Caille, T. Leblois
In this study, we developed a specific GaAs acoustic sensor adapted for molecules detection in biological media. The design was performed taking in mind that the device will be in contact with liquid. The resonant structure is a membrane. Microfabrication processes based on anisotropic chemical etching were used to obtain the right structure. The best performance was obtained in a (100) wafer with an electric field aligned along <;110> direction. For a membrane thickness of 50 μm, fR is close to 33.36 Mhz and the sensitivity is higher than for QCM and is similar to the values obtained using SPR techniques.
在这项研究中,我们开发了一种特殊的砷化镓声学传感器,适用于生物介质中的分子检测。设计时考虑到该装置将与液体接触。共振结构是一个膜。采用基于各向异性化学蚀刻的微细加工工艺获得了合适的结构。在电场沿方向排列的(100)晶圆中获得了最佳性能。当膜厚度为50 μm时,fR接近33.36 Mhz,灵敏度高于QCM,且与使用SPR技术获得的值相似。
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引用次数: 0
Single-layer microfluidic “spring” diodes via optofluidic lithography for ultra-low reynolds number applications 单层微流控“弹簧”二极管通过光流光刻超低雷诺数应用
R. Sochol, C. Glick, A. Lu, M. Wah, T. Brubaker, Kye Y. Lee, K. Iwai, Luke P. Lee, Liwei Lin
Microfluidic components that are capable of autonomous “on-chip” operations at ultra-low Reynolds number (e.g., Re <; 0.2) are critical to the advancement of integrated fluidic circuitry for chemical and biological applications, including point-of-care (POC) molecular diagnostics and on-site chemical detection. Previously, researchers have utilized dynamic resistive elements, such as suspended microbeads and rotational microstructures, to rectify Re <; 0.2 flow; however, such systems require hydrodynamic forces to return the resistive elements to their “closed state” positions, allowing undesired reverse flow during this process. Conversely, double-layer “flap-type” check valves immediately return to their closed state in the absence of forward flow; unfortunately, such valves have exhibited limited functionality for Re <; ~0.3 flow. To overcome these issues, here we introduce single-layer microfluidic “spring” diodes, which utilize free-standing polymeric microsprings that: (i) compress to promote forward flow, (ii) return to the closed position in the absence of forward flow, and (iii) remain in the closed position to obstruct reverse flow. The free-standing microspring elements were constructed in situ via optofluidic lithography processes. Experimental results revealed an improvement in Di performance with increasing Re for Re <; 0.1; however, Di's were found to decrease for Re > 0.1. At maximum, we observed an experimental average Di of 4.10±0.01, corresponding to 0.075 <; Re <; 0.1 fluid flow.
能够在超低雷诺数(例如,re0.1)下自主“片上”操作的微流控元件。最大时,实验平均Di为4.10±0.01,对应于0.075 <;Re <;0.1流体流动。
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引用次数: 8
A wearable percutaneous implant for long term zebrafish epicardial ECG recording 一种用于长期记录斑马鱼心外膜心电图的可穿戴经皮植入物
Yu Zhao, Fei Yu, H. Cao, Honglong Chang, Xiaoxiao Zhang, T. Hsiai, Y. Tai
Heart, as the least regenerative organ in human, can regenerate in zebrafish even after up to 20% ventricle amputation without forming any scar tissue. The Electrocardiogram (ECG) recorded from multiple fixed locations around the heart with high spatial resolution can elucidate changes in cardiac electric phenotypes of injured and regenerating tissues. Therefore, a wearable zebrafish harness with a percutaneous planar electrode array was designed, fabricated and properly positioned to uncover the electrical conduction phenotypes during the zebrafish heart regeneration. The recording circuitry and data processing have also been developed and customized, paving the way to the future underwater wireless long-term ECG recording in real time.
心脏作为人类再生能力最差的器官,即使在脑室截肢20%后,斑马鱼的心脏也能再生而不形成任何疤痕组织。从心脏周围多个固定位置记录的高空间分辨率心电图(ECG)可以阐明损伤组织和再生组织心脏电表型的变化。因此,设计、制作了一种可穿戴的斑马鱼经皮平面电极阵列束带,并将其放置在合适的位置,以揭示斑马鱼心脏再生过程中的电传导表型。记录电路和数据处理也进行了开发和定制,为未来水下无线长期实时心电记录铺平了道路。
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引用次数: 6
Dedicated test structure for the measurement of adhesion forces between contacting surfaces in MEMS devices 用于测量MEMS器件接触面间附着力的专用测试结构
J. Coster, F. Ling, A. Witvrouw, I. Wolf
This paper reports on a new test structure that is designed for measuring adhesion forces that arise between contacting surfaces in microelectromechanical systems (MEMS). More specifically, the test structure allows one to measure the force that occurs when out-of-plane moving MEMS enter into mechanical contact with a bottom electrode. The test structure has been designed and fabricated in imec's poly-SiGe MEMS platform. A measurement procedure that relies on the use of a laser Doppler vibrometer (LDV) has been elaborated. The measurement results that were obtained at different pressure levels and in dry environments as well as in environments with varying levels of relative humidity show how van der Waals and other adhesion forces can be measured using the device.
本文报道了一种新的测试结构,用于测量微机电系统(MEMS)接触面之间产生的附着力。更具体地说,测试结构允许人们测量当平面外移动MEMS与底部电极机械接触时发生的力。在imec的poly-SiGe MEMS平台上设计并制作了测试结构。本文阐述了一种基于激光多普勒测振仪(LDV)的测量方法。在不同压力水平和干燥环境以及不同相对湿度水平的环境下获得的测量结果表明,如何使用该设备测量范德华力和其他附着力。
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引用次数: 4
Three dimensional lobule-mimetic regeneration in vitro by PEGDA-based cell sheets pegda细胞片体外三维模拟小叶再生
Y. S. Chen, L. Ke, C. Tung, C. Lu, C. C. Hu, C. H. Liu
We propose a forming method of hydrogel-based cell sheets for regenerating three dimensional lobule-mimetic constructions. Accumulating the cells are conventional methods of three dimensional designs. In this study, we have designed a cell sheet chip to form a poly (ethylene glycol) diacrylate (PEGDA)-based cell sheet by two methods. First method is to pattern cells by DEP force for mimicking the pattern of the hepatocyte in vivo. Second method is to embed cells by UV light for photopolymerizing the PEGDA-based cell sheet. Stacking chip was used to form multilayer PEGDA-based cell sheets. The three dimensional lobule-mimetic regeneration will have widespread the applications in tissue engineering and detoxication experiments.
我们提出了一种水凝胶基细胞片的形成方法,用于再生三维模拟小叶结构。累积单元是三维设计的常用方法。在这项研究中,我们设计了一个细胞片芯片,通过两种方法形成聚乙二醇二丙烯酸酯(PEGDA)基细胞片。第一种方法是用DEP力模拟肝细胞在体内的模式。第二种方法是用紫外光包埋细胞,光聚合pegda基细胞片。采用堆叠芯片形成多层pegda基细胞片。三维模拟小叶再生在组织工程和解毒实验中具有广泛的应用前景。
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引用次数: 2
An electrolyte droplet-based low frequency accelerometer based on molecular electronic transducer 一种基于分子电子传感器的电解液液滴低频加速度计
Hai Huang, Mengbing Liang, R. Tang, J. Oiler, T. Ma, Hongyu Yu
This paper reports a liquid-state low frequency micro-accelerometer based on molecular electronic transducer (MET) which senses movement of liquid electrolyte relative to fixed electrodes. The device employs a sub-microliter electrolyte droplet encapsulated in oil as the sensing body and MET electrodes as read-out mechanism. Silicon-based planar micro-fabrication technology is applied to simplify the fabrication and enable mass production. The device achieves sensitivity of 10.8 V/G (G = 9.81 m/s2) at 20 Hz with nearly flat response over the frequency range of 1-40 Hz and a low noise floor of 100 μG/√(Hz) at 20 Hz.
本文报道了一种基于分子电子传感器(MET)的液态低频微加速度计,它能感知液体电解质相对于固定电极的运动。该装置采用亚微升封装在油中的电解液液滴作为传感体,MET电极作为读出机构。采用硅基平面微加工技术,简化了加工过程,实现了批量生产。该器件在20 Hz时灵敏度为10.8 V/G (G = 9.81 m/s2),在1 ~ 40 Hz频率范围内响应基本平稳,在20 Hz时本底噪声为100 μG/√(Hz)。
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引用次数: 13
Hybrid contact lens capable of intraocular pressure monitoring in noninvasive way 能无创监测眼压的混合型隐形眼镜
V. Laukhin, V. Lebedev, E. Laukhina, Raúl Martín, J. Pastor, Rosa Villa, J. Aguiló, C. Rovira, J. Veciana
The purpose of this paper is the development of devices for monitoring the intraocular pressure (IOP) variations in a non-invasive way. The importance of the problem is caused by the need of a glaucoma diagnostic by control of the IOP in patients. It has been shown [1] that monitoring of the IOP variations over 24 h may change the glaucoma management of patients. Here we present a new prototype of an IOP sensing device based on a commercial hybrid contact lens (HCL) that provides a greater comfort for patients. Although the HCL was equipped with the same sensing BL film as in [2], in the sensing lens fabrication, a new design approach has been used. This approach allowed the use of different parts of the same BL film gauge as the pressure sensor and temperature effect compensator.
本文的目的是开发一种无创方式监测眼压(IOP)变化的设备。这个问题的重要性是由于需要通过控制患者的眼压来诊断青光眼。已有研究表明[1],监测24小时内IOP的变化可能会改变青光眼患者的治疗。在这里,我们提出了一种基于商用混合隐形眼镜(HCL)的IOP传感装置的新原型,为患者提供了更大的舒适度。虽然HCL配备了与[2]相同的感应BL膜,但在感应透镜的制造中,采用了新的设计方法。这种方法允许使用同一BL薄膜计的不同部分作为压力传感器和温度效应补偿器。
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引用次数: 4
Microfluidic tunable metamaterial for gigahertz filter array 用于千兆赫滤波器阵列的微流控可调超材料
Ai Qun Liu, W. Zhu, Q. Song, R. F. Huang, S. Ting, Jinghua Teng, X. Zhang
In this paper, we demonstrate a metamaterial tunable filter with liquid metal, which can be tuned by changing the air pressure within the channels. In experiment, it measures a 3.3-GHz tuning range for the tunable metmaterial unit with the working wavelength of 11.27 GHz. The tuning of 9 × 9 unit array is demonstrated. Different from traditional metamaterials, the metal patterns of the tunable metamaterial filter are liquid state which can be reshaped once fabricated. The liquid state metal pattern not only advances in flexible tuning method, but also results in large tuning range for vast applications, such as tunable filter, accelerometer and optical switch.
在本文中,我们展示了一种用液态金属制成的超材料可调谐滤波器,它可以通过改变通道内的空气压力来调谐。在实验中,测量了工作波长为11.27 GHz的可调谐超材料单元的3.3 GHz调谐范围。演示了9 × 9单元阵列的调谐。与传统的超材料不同的是,可调谐超材料滤波器的金属图案是液态的,可以在制作完成后进行重塑。液态金属图案不仅在灵活的调谐方法上取得了进步,而且在可调谐滤波器、加速度计和光开关等广泛应用中具有大的调谐范围。
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引用次数: 5
期刊
2013 Transducers & Eurosensors XXVII: The 17th International Conference on Solid-State Sensors, Actuators and Microsystems (TRANSDUCERS & EUROSENSORS XXVII)
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