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2020 IEEE International Conference on Flexible and Printable Sensors and Systems (FLEPS)最新文献

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Glycine-based Flexible Biocompatible Piezoelectric Pressure Sensor for Healthcare Applications 医疗保健应用的甘氨酸柔性生物相容性压电压力传感器
Pub Date : 2020-08-16 DOI: 10.1109/FLEPS49123.2020.9239575
Ensieh S. Hosseini, Libu Manjakkal, D. Shakthivel, R. Dahiya
This work presents biocompatible flexible piezoelectric composite fabricated by self-assembly of amino acid glycine molecules inside natural chitosan polymer. Piezoelectric composite film consists of glycine spherulite structure embedded in chitosan matrix. The x-ray diffraction confirms the crystallization of stable $beta$-glycine inside the composite and hence its piezoelectric nature. As a result, a simple solvent-casting technique have been used to fabricate the biodegradable composite of $beta$-glycine/chitosan with significant piezoelectric response. We show that the piezoelectric sensor can precisely measure pressure in the range of 0-40 kPa with sensitivity of $sim 4.7$ mV kPa$^{-1}$. The devices based on bio-based functional material such as glycine offer huge potential for disposable wearable health applications such as monitoring the pressure in a compression bandage.
利用氨基酸甘氨酸分子在天然壳聚糖聚合物内自组装制备生物相容性柔性压电复合材料。压电复合薄膜由嵌入壳聚糖基体的甘氨酸球粒结构构成。x射线衍射证实了复合材料内部稳定的$beta$ -甘氨酸的结晶,因此具有压电性质。因此,采用简单的溶剂铸造技术制备了具有显著压电响应的可生物降解$beta$ -甘氨酸/壳聚糖复合材料。结果表明,该压电传感器可以精确测量0-40 kPa范围内的压力,灵敏度为$sim 4.7$ mV kPa $^{-1}$。基于生物基功能材料(如甘氨酸)的设备为一次性可穿戴健康应用(如监测压缩绷带中的压力)提供了巨大的潜力。
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引用次数: 2
3D Printed Capacitive Tilt Sensor 3D打印电容式倾斜传感器
Pub Date : 2020-08-16 DOI: 10.1109/FLEPS49123.2020.9239573
Oliver Ozioko, Habib Nassar, Christopher Muir, R. Dahiya
This work presents 3D printed tilt sensor to measure fluid level and tilt sensing in robotics. It comprises of four 3D printed interdigitated capacitive sensors printed as a single structure and immersed in liquid $mathrm{E}mathrm{c}mathrm{o}mathrm{f}mathrm{l}mathrm{e}mathrm{x}^{mathrm{T}mathrm{M}}$ (part A only). When the orientation of the sensor changes, the level of fluid in contact with the sensors also changes and this causes a change in the capacitance. The sensors were first printed individually and change in capacitance measured for different fluid levels. The response of the individual capacitive sensors shows a stable response for a dip and remove cyclic test in fluid at frequency of 0. 625Hz. The results of the tilting experiments show a relative change in capacitance ($Delta$ ClC $theta$ $sim$ 0.1% per degree for an angle range of $sim-20^{0}$ to $sim+20^{0}$. With $sim$ $6.7^{0}$ detected per mm of the level of fluid in contact with the sensor, the result shows the capability to achieve a measurement range of at least $simpm 93.8^{0}$ (for a sensor of length of $sim$12mm). The study carried out in this work finds application in tilt sensing in robotics as well as in fluid-level sensing in which case the sensor could be printed as part of the structure of the fluid container.
这项工作提出了3D打印倾斜传感器测量流体水平和倾斜传感机器人。它由四个3D打印的交叉数字电容传感器组成,作为一个单一结构打印并浸入液体$mathrm{E}mathrm{c}mathrm{o}mathrm{f}mathrm{l}mathrm{e}mathrm{x}^{mathrm{T}mathrm{M}}$(仅限a部分)。当传感器的方向发生变化时,与传感器接触的流体的液位也会发生变化,从而导致电容的变化。首先将传感器单独打印,并测量不同液位下电容的变化。单个电容式传感器的响应在频率为0的流体中显示出稳定的浸出循环响应。625Hz。倾斜实验结果显示电容的相对变化($Delta$ ClC $theta$$sim$ 0.1)% per degree for an angle range of $sim-20^{0}$ to $sim+20^{0}$. With $sim$ $6.7^{0}$ detected per mm of the level of fluid in contact with the sensor, the result shows the capability to achieve a measurement range of at least $simpm 93.8^{0}$ (for a sensor of length of $sim$12mm). The study carried out in this work finds application in tilt sensing in robotics as well as in fluid-level sensing in which case the sensor could be printed as part of the structure of the fluid container.
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引用次数: 2
Printed Nitrogen-Doped Reduced Graphene Oxide Based Sensor For Uric Acid Detection 印刷氮掺杂还原氧化石墨烯传感器用于尿酸检测
Pub Date : 2020-08-16 DOI: 10.1109/FLEPS49123.2020.9239567
Ammara Ejaz, Saoirse Dervin, R. Dahiya
This paper presents a flexible printed sensor for the accurate detection of uric acid (UA) by a simple chemical route synthesis. The sensitive nanomaterial (N-rGO) was prepared from the dual interaction of 1,4-xylenediamine (XDA) and Graphene oxide (GO) by covalent and $pi-pi$ stacking interaction. N-rGO was printed on a flexible polyvinyl chloride (PVC) substrate and analyzed in 0.1 M PBS, pH 7.4 electrolyte for different concentrations of UA. The sensor exhibited a wide segmented linear range of $3-40times 10^{-5}M$ and $1-8{mathrm {x}}10^{-3}{mathrm {M}}$ with a sensitivity of 0.733 ${mathrm {mAmM^{-1}}}$ and 0.0277 ${mathrm {mAmM^{-1}}}$ respectively. The 0.0077% standard deviation from 30 consecutive measurements suggests that the sensor exhibits excellent reproducibility. Thus, the presented sensor is an alternative to currently available commercial bulky UA sensors.
本文提出了一种柔性印刷传感器,用于通过简单的化学合成方法精确检测尿酸(UA)。以1,4-二甲二胺(XDA)和氧化石墨烯(GO)为原料,通过共价和$pi-pi$叠加相互作用制备了N-rGO敏感纳米材料。将N-rGO打印在柔性聚氯乙烯(PVC)衬底上,并在0.1 M PBS, pH 7.4电解质中分析不同浓度的UA。该传感器具有3-40 × 10^{-5}M$和1-8 × 10^{-3}{mathrm {x}} $的宽分段线性范围,灵敏度分别为0.733 ${mathrm {mAmM^{-1}} $和0.0277 ${mathrm {mAmM^{-1}}}$。30次连续测量的0.0077%标准偏差表明该传感器具有良好的再现性。因此,所提出的传感器是目前可用的商用笨重UA传感器的替代方案。
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引用次数: 0
Flexible Linear Absolute Encoder System for Force Localization in Soft Environments 软环境下力定位的柔性线性绝对编码器系统
Pub Date : 2020-08-16 DOI: 10.1109/FLEPS49123.2020.9239519
Kuter Erdil, Doğukan Korkut, Ö. G. Akcan, B. Muslu, Y. D. Gökdel, Eray A. Baran
This paper proposes a novel disposable linear absolute encoder system and its peripheral electronic readout circuitry to be used for the localization of force in a continuum media such as a flexible robotic arm. The proposed structure relies on the design of graphite layers on a flexible surface that shows varying resistance based on the applied strain. The proposed topology can localize the force applied on a continuous paper based sensor having the geometry of an absolute encoder system. The successful results obtained from the experiments prove the efficacy of the proposed system while opening new paradigms for the possibility of contact force localization in flexible structures like soft robots.
本文提出了一种新的一次性线性绝对编码器系统及其外围电子读出电路,用于连续介质(如柔性机械臂)中的力定位。所提出的结构依赖于柔性表面上石墨层的设计,该表面根据施加的应变显示不同的电阻。所提出的拓扑结构可以定位施加在具有绝对编码器系统几何形状的连续纸张传感器上的力。实验结果证明了该系统的有效性,同时为柔性结构(如软机器人)接触力定位的可能性开辟了新的范例。
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引用次数: 1
Stomatal Transpiration Monitoring using a Wearable Leaf Sensor 利用可穿戴叶片传感器监测气孔蒸腾
Pub Date : 2020-08-16 DOI: 10.1109/FLEPS49123.2020.9239465
Sanjog Joshi, Tejas R. Naik, Rajul S. Patkar, M. Baghini
In this work, we demonstrate, for the first time, a direct approach for transpiration monitoring using a simple screen-printed flexible paper sensor. Filter paper acts as an excellent sensing material and provides a change in capacitance owing to change in its dielectric constant with moisture absorption and desorption. We measure the transient response of the sensor and accordingly define an appropriate sampling to monitor the transpiration by measuring capacitance over a period of time. The low cost flexible paper-based sensor provides a simple, efficient, and smart way to monitor transpiration.
在这项工作中,我们首次展示了使用简单的丝网印刷柔性纸传感器进行蒸腾监测的直接方法。滤纸作为一种优良的传感材料,由于其介电常数随着吸湿和解吸的变化而变化,从而使电容发生变化。我们测量传感器的瞬态响应,并相应地定义一个适当的采样,通过测量电容在一段时间内监测蒸腾。这种低成本的柔性纸张传感器提供了一种简单、高效、智能的监测蒸腾的方法。
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引用次数: 0
Variation-Tolerant Digital Circuit Design for Printed/Flexible Electronics (Invited Paper) 印刷/柔性电子器件的容差数字电路设计(特邀论文)
Pub Date : 2020-08-16 DOI: 10.1109/FLEPS49123.2020.9239438
J. Chang, T. Ge, Tong Lin
Contemporary digital circuits are synchronous-logic and are operationally error-free because they are designed to complete their operation within a predefined time period. In some applications, such as the MOST operating in ultra-deep subthreshold or in flexible electronics where the TFT is printed, the ensuing operation of digital circuits is prone to error. This is because the variations of the delay of the transistor are very high and the ensuing predefined time period is difficult to ascertain. In the case of the printed TFT where its substrate is flexible and hence possibly bent, the delay is possibly intractable, in part because the profile of the bending may not be known. In this paper, we will discuss the commonality between ultra-deep subthreshold and printed TFTs in terms of their variations. We describe the application of the esoteric asynchronous-logic Quasi-Delay-Insensitive (QDI) signaling protocol to design digital circuits that innately accommodate intractable delay characteristics, i.e., error-free operation despite intractable variations. To mitigate the hardware, power and timing overheads of QDI, we will present our proposed modified signaling protocol named Pseudo-QDI and our proposed Pre-Charged-Static-Logic design style.
现代数字电路是同步逻辑的,并且在操作上没有错误,因为它们被设计成在预定义的时间段内完成操作。在某些应用中,例如在超深亚阈值中工作的MOST或在印刷TFT的柔性电子器件中,数字电路的后续操作容易出错。这是因为晶体管延迟的变化是非常高的,随后预定义的时间周期是难以确定的。在印刷TFT的情况下,其衬底是柔性的,因此可能弯曲,延迟可能是棘手的,部分原因是弯曲的轮廓可能不知道。在本文中,我们将讨论超深亚阈值和印刷tft在其变化方面的共性。我们描述了深奥的异步逻辑准延迟不敏感(QDI)信令协议的应用,以设计天生适应难以处理的延迟特性的数字电路,即,尽管难以处理的变化,但无错误操作。为了减少QDI的硬件、电源和时序开销,我们将提出我们提议的修改后的信令协议,命名为Pseudo-QDI和我们提议的预充电静态逻辑设计风格。
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引用次数: 0
Screen-Printed Flexible Carbon versus Silver Electrodes for Electrochemical Sensors 用于电化学传感器的丝网印刷柔性碳与银电极
Pub Date : 2020-08-16 DOI: 10.1109/FLEPS49123.2020.9239549
F. F. Franco, Libu Manjakkal, R. Dahiya
This paper presents the carbon-based screen-printed electrodes (C-SPEs) and compares them with conventional SPEs made of Ag. The electrochemical performance of the two types of electrodes is compared in the presence of common salts found in water bodies (e.g. NaCl, NaNO3) by performing the cyclic voltammetry (CV), differential pulse voltammetry (DPV) and electrochemical impedance spectroscopy (EIS) studies. We observed that while C-SPEs stay mostly inert in salt solutions, Ag seems to interact with salts, showing faradaic and non-faradaic responses. The results show the potential for development of electrochemical sensors with sustainable materials such as carbon and their application in water quality monitoring.
本文介绍了碳基丝网印刷电极(c - spe),并将其与传统的银基丝网印刷电极进行了比较。通过循环伏安法(CV)、差分脉冲伏安法(DPV)和电化学阻抗谱法(EIS)研究,比较了两种电极在水体中常见盐类(如NaCl、NaNO3)存在下的电化学性能。我们观察到,虽然c - spe在盐溶液中大多保持惰性,但银似乎与盐相互作用,表现出法拉第和非法拉第反应。研究结果显示了碳等可持续材料电化学传感器的发展潜力及其在水质监测中的应用。
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引用次数: 2
3D-Printing of a Lemon Battery via Fused Deposition Modelling and Electrodeposition 通过熔融沉积建模和电沉积的柠檬电池的3d打印
Pub Date : 2020-08-16 DOI: 10.1109/FLEPS49123.2020.9239462
A. Dijkshoorn, Luka Šćulac, R. Sanders, W. Olthuis, S. Stramigioli, G. Krijnen
This paper introduces the fabrication of a lemon battery enabled through Fused Deposition Modelling (FDM) with commercially available filaments in combination with electrodeposition. The battery consists of a printed polylactic acid (PLA) structure with two 3D-printed, conductive polymer composite electrodes with a layer of deposited copper and zinc, immersed into a citric acid electrolyte. The current battery shows a capacity of at least 0.23 mWh, where the high internal resistance of around 310 ohms still poses a performance issue. The combined FDM and electrodeposition fabrication method presents a first step towards fabrication of arbitrarily shaped batteries without the need for parts assembly or chemical treatment of filaments, potentially powering co-printed electronics.
本文介绍了一种柠檬电池的制造,通过熔融沉积建模(FDM),使商业上可用的灯丝与电沉积相结合。该电池由打印的聚乳酸(PLA)结构和两个3d打印的导电聚合物复合电极组成,电极上有一层沉积的铜和锌,浸入柠檬酸电解质中。目前的电池容量至少为0.23兆瓦时,其中310欧姆左右的高内阻仍然构成性能问题。FDM和电沉积相结合的制造方法为制造任意形状的电池迈出了第一步,而不需要零件组装或对细丝进行化学处理,可能为共印电子产品提供动力。
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引用次数: 1
Emerging sustainable sensors based on nanostructures on flexible and disposable substrates 基于柔性和一次性衬底的纳米结构的新兴可持续传感器
Pub Date : 2020-08-16 DOI: 10.1109/FLEPS49123.2020.9239509
M. Willander, O. Nur, R. Dahiya
This paper gives an overview of recently demonstrated sensors based on the nanomaterials synthesized on different flexible and disposable substrates. The sensors to be presented are for wide range of applications, e.g. detection of toxic heavy metals, diagnostic applications etc. During the talk, the suitable different nanomaterials synthesis methods are to be also presented. The advantages and superiority of the emerging sensors using sustainable materials will also be discussed.
本文综述了近年来在不同柔性和一次性衬底上合成的基于纳米材料的传感器。这些传感器的应用范围很广,例如有毒重金属的检测、诊断应用等。在讲座中,我们将介绍不同的纳米材料合成方法。本文还将讨论使用可持续材料的新型传感器的优势和优越性。
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引用次数: 0
[FLEPS 2020 Front cover] [FLEPS 2020封面]
Pub Date : 2020-08-16 DOI: 10.1109/fleps49123.2020.9239592
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引用次数: 0
期刊
2020 IEEE International Conference on Flexible and Printable Sensors and Systems (FLEPS)
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