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Sensors and actuators. A, Physical 65건

  1. [해외논문]   Editorial Board   SCI SCIE


    Sensors and actuators. A, Physical v.269 ,pp. ii - ii , 2018 , 0924-4247 ,

    초록

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    무료다운로드 유료다운로드

    회원님의 원문열람 권한에 따라 열람이 불가능 할 수 있으며 권한이 없는 경우 해당 사이트의 정책에 따라 회원가입 및 유료구매가 필요할 수 있습니다.이동하는 사이트에서의 모든 정보이용은 NDSL과 무관합니다.

    NDSL에서는 해당 원문을 복사서비스하고 있습니다. 아래의 원문복사신청 또는 장바구니담기를 통하여 원문복사서비스 이용이 가능합니다.

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  2. [해외논문]   Multiphysics model investigating performance of a micromachined floating element shear stress sensor   SCI SCIE

    Kastor, Nikolas (Corresponding author.) , Zhao, Zhengxin , White, Robert D.
    Sensors and actuators. A, Physical v.269 ,pp. 1 - 13 , 2018 , 0924-4247 ,

    초록

    Abstract A MEMS floating element shear stress sensor has been developed for flow testing applications, targeted primarily at ground and flight testing of aerospace vehicles and components. A comprehensive numerical model of this sensor is described in this paper, quantifying the behavior of the mechanical components, fluid interaction, and electrostatics in three, non-coupled, 3-D numerical simulations: 1) A finite element model of the static element. 2) A steady state, incompressible, viscous, laminar, Newtonian computational fluid dynamics (CFD) model, for both flat and textured versions of the floating shuttle. 3) A finite element model of the capacitive sensing combs. The distribution of aerodynamic forces over the floating element was studied to determine which features contributed most to the total applied force and sensitivity. Shear stress forces account for 74% of the sensitivity of the flat sensor, with the remainder coming primarily from pressure gradient effects. For a textured sensing element, while the total sensor sensitivity increases between 17% and 27%, only 34% of the output is due to shear forces, and the response is more nonlinear. Thus, a flat sensor with as little surface topology as possible is preferable to reduce pressure gradient sensitivity and nonlinearity, even though it may exhibit lower overall sensitivity to flow forces. In addition, the sensor is shown to not only deflect in the direction of flow due to shear forces, but also to lift away from the substrate and pitch its downstream edge away from the surface. Pitch rotation contributes as much as 37% of the output of the sensor for a textured element, but less than 1% for the flat element. For a perfectly symmetric device, differential measurement completely eliminates the contribution from lift. Overall, the model gives a more complete picture of the sensing mechanisms present in a floating element shear stress sensor, and demonstrates the aerodynamic complexities which motivate careful design and calibration of these types of sensors. Highlights A multi-physics 3D model of a floating element shear stress sensor is developed. Complex forces interact with the sensor and contribute to total sensor output. Aerodynamic forces cause deflections in downstream, lift and pitch directions. Adding surface topology to the sensor increases pressure gradient sensitivity. Sensors must be designed with minimal topology to maximize shear sensitivity.

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    무료다운로드 유료다운로드

    회원님의 원문열람 권한에 따라 열람이 불가능 할 수 있으며 권한이 없는 경우 해당 사이트의 정책에 따라 회원가입 및 유료구매가 필요할 수 있습니다.이동하는 사이트에서의 모든 정보이용은 NDSL과 무관합니다.

    NDSL에서는 해당 원문을 복사서비스하고 있습니다. 아래의 원문복사신청 또는 장바구니담기를 통하여 원문복사서비스 이용이 가능합니다.

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  3. [해외논문]   IQ signal based RFID sensors for defect detection and characterisation   SCI SCIE

    Zhao, Aobo (School of Engineering, Newcastle University, NE1 7RU, United Kingdom ) , Tian, Gui Yun (School of Engineering, Newcastle University, NE1 7RU, United Kingdom ) , Zhang, Jun (School of Automation Engineering, University of Electronic Science and Technology of China, Sichuan, 611731, China)
    Sensors and actuators. A, Physical v.269 ,pp. 14 - 21 , 2018 , 0924-4247 ,

    초록

    Abstract Radio frequency identification (RFID) sensor systems have unique advantages of identification, communication and sensing together. Previous researches on RFID based sensing investigate power based features, and face the challenges of low sensitivity and robustness due to environment RF field. In this paper, rather than using received signal strength indicator (RSSI), we present a method using features of transient responses from in-phase quadrature (IQ) signal to overcome the challenges of sensitivity and robustness in ultra-high frequency (UHF) RFID sensor systems. The transient responses of the IQ signal are analysed using skewness feature for different defects. The experimental results show that IQ based skewness features from IQ signal improve sensitivity and robustness for defect characterisation compared with previous RSSI and RCS methods. Highlights An RFID sensing system with IQ analogue response capturing is designed. A defect characterisation method using skewness feature of IQ transient response is proposed. Sensitivity and robustness of proposed feature extraction method is validated for corrosion and natural crack sensing.

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    무료다운로드 유료다운로드

    회원님의 원문열람 권한에 따라 열람이 불가능 할 수 있으며 권한이 없는 경우 해당 사이트의 정책에 따라 회원가입 및 유료구매가 필요할 수 있습니다.이동하는 사이트에서의 모든 정보이용은 NDSL과 무관합니다.

    NDSL에서는 해당 원문을 복사서비스하고 있습니다. 아래의 원문복사신청 또는 장바구니담기를 통하여 원문복사서비스 이용이 가능합니다.

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  4. [해외논문]   Salinity sensor using photonic crystal fiber   SCI SCIE

    Vigneswaran, D. (Department of Electronics and Communication Engineering, Sri Krishna College of Technology, Coimbatore, Tamilnadu, 641042, India ) , Ayyanar, N. (Department of Electronics and Communication Engineering, Dhirajlal Gandhi College of Technology, Salem, 636309, India ) , Sharma, Mohit (Department of Physics, Birla Institute of Technology, Mesra, Ranchi, Jharkhand, 835215, India ) , Sumathi, M. (Department of Electronics and Communication Engineering, Dhirajlal Gandhi College of Technology, Salem, 636309, India ) , M.S., Mani Rajan (Department of Physics, University College of Engineering, Anna University, Ramanathapuram, 623513, India ) , Porsezian, K. (Department of Physics, Pondicherry University, Puducherry, 605 014, India)
    Sensors and actuators. A, Physical v.269 ,pp. 22 - 28 , 2018 , 0924-4247 ,

    초록

    Abstract A salinity sensor employing photonic crystal fiber is designed for measuring the concentration of salt in sea water. The sea water sample is infiltrated into one of the air holes in cladding, which offers high confinement loss and act as an analyte core mode and background acts as silica mode. In order to satisfy the phase matching condition, the power transferred from silica core to the liquid filled analyte core, which is investigated using finite element method. An enhanced sensitivity of salinity in sea water reports as 5405nm/RIU for x -polarization and 5675nm/RIU for y -polarization with a detection limit of 0.0037 RIU has been reported. The proposed PCF also promises to yield the large birefringence of order 10 −3 along with the enhanced sensitivity. Highlights Unique salinity sensor employing photonic crystal fiber is designed for the first time. Infiltration of sea water in air holes offers high confinement loss and act as analyte core mode. The designed sensor exhibit high sensitivity for the determination of salinity in seawater. The high sensitivity for x and y-polarization is reported as 5405 and 5675nm/RIU, respectively. Proposed PCF promises the large birefringence of the magnitude of 10^(-3).

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    무료다운로드 유료다운로드

    회원님의 원문열람 권한에 따라 열람이 불가능 할 수 있으며 권한이 없는 경우 해당 사이트의 정책에 따라 회원가입 및 유료구매가 필요할 수 있습니다.이동하는 사이트에서의 모든 정보이용은 NDSL과 무관합니다.

    NDSL에서는 해당 원문을 복사서비스하고 있습니다. 아래의 원문복사신청 또는 장바구니담기를 통하여 원문복사서비스 이용이 가능합니다.

    이미지

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  5. [해외논문]   In situ antenna diagnostics and characterization system based on RFID and Remotely Piloted Aircrafts   SCI SCIE

    Á (Área de Teoría de la Señal y Comunicaciones, Departamento de Ingeniería Eléctrica, Universidad de Oviedo, Spain ) , lvarez Ló (Área de Teoría de la Señal y Comunicaciones, Departamento de Ingeniería Eléctrica, Universidad de Oviedo, Spain ) , pez, Yuri (Área de Teoría de la Señal y Comunicaciones, Departamento de Ingeniería Eléctrica, Universidad de Oviedo, Spain ) , Garcí (Área de Teoría de la Señal y Comunicaciones, Departamento de Ingeniería Eléctrica, Universidad de Oviedo, Spain ) , a Ferná (Área de Teoría de la Señal y Comunicaciones, Departamento de Ingeniería Eléctrica, Universidad de Oviedo, Spain ) , ndez, Marí (Departamento de Explotación y Prospección de Minas, Escuela politécnica de Mieres, Universidad de Oviedo, Spain ) , a (Área de Ingeniería Eléctrica, Departamento de Ingeniería Eléctrica, Universidad de Ov) , Á , lvarez Narciandi, Guillermo , Arboleya Arboleya, Ana , Las-Heras André , s, Fernando , Garcí , a Corté , s, Silverio , Ferná , ndez Cabanas, Mané , s
    Sensors and actuators. A, Physical v.269 ,pp. 29 - 40 , 2018 , 0924-4247 ,

    초록

    Abstract A cost-effective solution for in situ antenna characterization and diagnostics based on Radio Frequency IDentification technology and Remotely Piloted Aircrafts is presented. The cost-effectiveness of the proposed solution is achieved by replacing the radio frequency equipment on-board the small aircrafts with Radio Frequency IDentification tags, while the Antenna Under Test is connected to a Radio Frequency IDentification reader, thus reducing the weight and complexity of the payload of the aircrafts dedicated to antenna measurement task. Received Signal Strength measurements are geo-referred with centimeter-level accuracy thanks to a Real Time Kinematic system. An iterative phase retrieval technique based on the Sources Reconstruction Method is used to recover an equivalent magnetic currents distribution on the Antenna Under Test aperture plane. The reconstructed currents distribution provides antenna diagnostics information and enables the calculation of the antenna radiation pattern. The presented method has been validated by means of measurements in the UHF band for two different antenna arrays with excellent results. Highlights In situ antenna diagnostics and characterization from near field measurements. Quick detection of antenna arrays malfunctioning elements. Use of small RPAs: the payload is reduced to a single RFID tag and a RTK beacon. Antenna measurement conducted in less than 10 minutes. cm-level accuracy thanks to the use of RTK data geo-referring. Phase retrieval method capable of handling arbitrary geometry acquisition grids. Methodology based on Received Signal Strength measurements. Graphical abstract [DISPLAY OMISSION]

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    무료다운로드 유료다운로드

    회원님의 원문열람 권한에 따라 열람이 불가능 할 수 있으며 권한이 없는 경우 해당 사이트의 정책에 따라 회원가입 및 유료구매가 필요할 수 있습니다.이동하는 사이트에서의 모든 정보이용은 NDSL과 무관합니다.

    NDSL에서는 해당 원문을 복사서비스하고 있습니다. 아래의 원문복사신청 또는 장바구니담기를 통하여 원문복사서비스 이용이 가능합니다.

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    Fig. 1 이미지
  6. [해외논문]   Biomimetic tactile sensors and signal processing with spike trains: A review   SCI SCIE

    Yi, Zhengkun (School of Mechanical and Aerospace Engineering, Nanyang Technological University, 639798, Singapore ) , Zhang, Yilei (School of Mechanical and Aerospace Engineering, Nanyang Technological University, 639798, Singapore ) , Peters, Jan (Intelligent Autonomous Systems Lab, Department of Computer Science, Technische Universitaet Darmstadt, 64289, Germany)
    Sensors and actuators. A, Physical v.269 ,pp. 41 - 52 , 2018 , 0924-4247 ,

    초록

    Abstract The sense of touch plays a critical role in enabling human beings to interact with the surrounding environments. As robots move from laboratories to domestic environments, they are expected to be endowed with a similar tactile ability to perform complicated tasks such as manipulating objects with arbitrary unknown shapes. In the past decade, tremendous effort and progress have been made to mimic the sense of touch in human beings on robotic systems. Particularly, biomimetic tactile sensors and signal processing with spike trains have gained a growing interest. In this paper, we firstly review human sense of touch as it serves as a reference point in the case of biomimetic tactile sensing. Then, we focus on biomimetic tactile sensing technologies, which are primarily presented in two aspects: emulating the properties of mechanoreceptors using artificial tactile sensors, and biomimetic tactile signal processing with spike trains. Finally, we discuss the problems in current biomimetic tactile sensing techniques and deduce the future directions.

    원문보기

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    무료다운로드 유료다운로드

    회원님의 원문열람 권한에 따라 열람이 불가능 할 수 있으며 권한이 없는 경우 해당 사이트의 정책에 따라 회원가입 및 유료구매가 필요할 수 있습니다.이동하는 사이트에서의 모든 정보이용은 NDSL과 무관합니다.

    NDSL에서는 해당 원문을 복사서비스하고 있습니다. 아래의 원문복사신청 또는 장바구니담기를 통하여 원문복사서비스 이용이 가능합니다.

    이미지

    Fig. 1 이미지
  7. [해외논문]   Fabrication and implementation of printed sensors for taste sensing applications   SCI SCIE

    Nag, Anindya (Corresponding author.) , Mukhopadhyay, Subhas Chandra
    Sensors and actuators. A, Physical v.269 ,pp. 53 - 61 , 2018 , 0924-4247 ,

    초록

    Abstract This paper presents the design, fabrication, and implementation of low-cost taste sensors. A single-step procedure was performed using commercial polymer films to develop laser-induced graphene which was used as electrodes in sensor patches for taste sensing purposes. The cost of these sensor patches is less than two dollars based on the requirement for low-cost polymer films and Kapton tapes for developing the sensor patches. Five different chemicals corresponding to the five fundamental tastes of sour, sweet, salty, bitter and umami were tested with the developed sensors. The electrical parameters of the circuitry formed between the electrode-electrolyte interfaces during the experimental procedure were obtained by using the complex non-linear least square curve fitting technique by fitting a simulation curve to the Cole–Cole curve obtained from the experimental results. The sensor patches operating on a capacitive principle, exhibited significant differences in terms of their impedimetric responses for the kinetic processes taking place during the experiments, with different concentrations for each chemical. Four different concentrations were tested for each chemical to analyze the performance of the sensor for that particular chemical. A comparison between the responses of the five chemicals for each concentration was done to inspect the differences between their responses. An analysis of the differences in the conductivity response by the sensor patch for the five chemicals at a specific concentration was also done. The sensor patches did not show any hysteresis in their output responses, while obtaining significant repeatability when testing the chemicals with them. The response time of the sensor patches was around two seconds with the recovery time is 10min for the sensor being thoroughly washed and dried in between experiments The obtained experimental results from these sensor patches and their low cost, and easy fabrication process make them promising for their utilization in taste sensing purposes. Highlights Design and development of graphene sensors for taste sensing purposes. Commercial polymer films were used to develop the sensor patches. Laser induced graphene electrodes on Kapton tapes were employed as sensor patches. Chemical representing five basic tastes were experimented to determine the capability of the sensor to differentiate them. A comparative study was done between their responses in terms of resistance, reactance and conductivities.

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    무료다운로드 유료다운로드

    회원님의 원문열람 권한에 따라 열람이 불가능 할 수 있으며 권한이 없는 경우 해당 사이트의 정책에 따라 회원가입 및 유료구매가 필요할 수 있습니다.이동하는 사이트에서의 모든 정보이용은 NDSL과 무관합니다.

    NDSL에서는 해당 원문을 복사서비스하고 있습니다. 아래의 원문복사신청 또는 장바구니담기를 통하여 원문복사서비스 이용이 가능합니다.

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  8. [해외논문]   Development of highly sensitive optical sensor from carbon nanotube-alumina nanocomposite free-standing films: CNTs loading dependence sensor performance Analysis   SCI SCIE

    Abid (Corresponding author.) , Sehrawat, Poonam , Islam, S.S. , Gulati, Payal , Talib, Mohammad , Mishra, Prabhash , Khanuja, Manika
    Sensors and actuators. A, Physical v.269 ,pp. 62 - 69 , 2018 , 0924-4247 ,

    초록

    Abstract We report a highly sensitive optical sensor based on free-standing thin films derived from multi-walled carbon nanotubes (MWCNTs)-Alumina nanocomposite by Gel-cast technique. The sensing principle involves the change in the resistance/conductance of the fabricated nanocomposite film on interaction with the optical stimulus. The performance of the sensor strongly depends − on loading and dispersion of MWCNTs in Alumina host matrix; wavelength; and power density of the laser beam. The optimized loading of CNTs to achieve maximum sensitivity was 1.5wt%. The sensitivity of the sensor shows linear relationship with power density of the laser beam and found to be highly sensitive in Vis-NIR region. The maximum sensitivity of the sensor is found to be 13.2% at 635nm wavelength, 3.5mW/mm 2 power density of laser beam and at 1.5wt% MWCNTs loading in Alumina host matrix. At this loading, the response time and recovery time of the sensor are found to be 1.7s and 2.1s respectively. The additional advantage of the present sensor is that it is facile and cost-effective method to fabricate high performance optical sensors. Highlights A promising facile and economic technique to develop MWCNTs/Alumina composite film. Optical sensors prepared from free-standing films for varying MWCNTs contents. FESEM analysis corroborates homogeneous dispersal of MWCNTs in host matrix. Fast response, high sensitivity andexcellent repeatability in Vis-NIR region. The technique holds potential for commercial scale production.

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    무료다운로드 유료다운로드

    회원님의 원문열람 권한에 따라 열람이 불가능 할 수 있으며 권한이 없는 경우 해당 사이트의 정책에 따라 회원가입 및 유료구매가 필요할 수 있습니다.이동하는 사이트에서의 모든 정보이용은 NDSL과 무관합니다.

    NDSL에서는 해당 원문을 복사서비스하고 있습니다. 아래의 원문복사신청 또는 장바구니담기를 통하여 원문복사서비스 이용이 가능합니다.

    이미지

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  9. [해외논문]   Wireless chemiluminescence-based sensor for soil deformation detection   SCI SCIE

    Kuang, K.S.C.
    Sensors and actuators. A, Physical v.269 ,pp. 70 - 78 , 2018 , 0924-4247 ,

    초록

    Abstract A novel sensing application based on chemiluminescence was designed and tested in the laboratory for deformation monitoring in soil. The device, containing the reactants stored in separate chambers, on activation when deformed under load, result in an almost instantaneous production of light which could be readily detected using low-cost optoelectronics. The attractiveness of this concept for deformation monitoring is that the chemiluminescence sensor is completely passive, requiring no power for it to function. In this paper, the effort was focused on demonstrating the sensing capability of the chemiluminescence-based device for detecting soil deformation or movement in the event of a landslide. Laboratory experiments were conducted to demonstrate the proof-of-concept through a prototype of the device fabricated specifically for this study. Wireless transmission capability was also incorporated into the prototype design in view of the potential deployment in the field. Highlights Novel application of the phenomenon of chemiluminescence for monitoring application. Study demonstrated the potential of a battery-less sensor system for remote monitoring of landslide. Results of soil movement detection showed that the prototype sensor was capable of detecting the soil movement applied in the set-up. Soil movement detection sensitivity of the sensor could be adjusted according to the requirement of the soil condition.

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    무료다운로드 유료다운로드

    회원님의 원문열람 권한에 따라 열람이 불가능 할 수 있으며 권한이 없는 경우 해당 사이트의 정책에 따라 회원가입 및 유료구매가 필요할 수 있습니다.이동하는 사이트에서의 모든 정보이용은 NDSL과 무관합니다.

    NDSL에서는 해당 원문을 복사서비스하고 있습니다. 아래의 원문복사신청 또는 장바구니담기를 통하여 원문복사서비스 이용이 가능합니다.

    이미지

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  10. [해외논문]   A temperature-compensated graphene sensor for nitrate monitoring in real-time application   SCI SCIE

    Alahi, Md Eshrat E. (Faculty of Science and Engineering, Macquarie University, NSW 2109, Australia ) , Nag, Anindya (Faculty of Science and Engineering, Macquarie University, NSW 2109, Australia ) , Mukhopadhyay, Subhas Chandra (Faculty of Science and Engineering, Macquarie University, NSW 2109, Australia ) , Burkitt, Lucy (Institute of Agriculture and Environment, Massey University, Palmerston North, New Zealand)
    Sensors and actuators. A, Physical v.269 ,pp. 79 - 90 , 2018 , 0924-4247 ,

    초록

    Abstract Low-cost nitrate-N sensors and smart sensing systems are necessary to develop a distributed network to monitor the quality of water in real time. This paper presents the fabrication process of carbon printed sensors and the advantage of using a graphene sensor to measure the concentration of nitrate-N in water. The sensor was characterized at different temperatures and with different nitrate-N concentrations in water. Electrochemical Impedance Spectroscopy (EIS) was employed to characterize the developed sensors. The calibration standard with the temperature compensation is also explained. UV-Spectrometry was used to validate all the results and the range of concentrations was 1–70ppm. The sensing system has WiFi connectivity to transfer the data to a cloud server to monitor the data in real time. The sensor has shown good performance during measurements and the developed sensing system has very good potential to be a part of a distributed sensing network to monitor the data in real time. Highlights Fabrication process of CNT PDMS and Graphene based Interdigital Sensor. UV-Spectroscopy has been used for validation. The detection limit of nitrate-N is 1–70ppm. Temperature compensation is included to improve the measurement. An IoT enabled smart sensing system is proposed to monitor nitrate-N concentration in real-time.

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    무료다운로드 유료다운로드

    회원님의 원문열람 권한에 따라 열람이 불가능 할 수 있으며 권한이 없는 경우 해당 사이트의 정책에 따라 회원가입 및 유료구매가 필요할 수 있습니다.이동하는 사이트에서의 모든 정보이용은 NDSL과 무관합니다.

    NDSL에서는 해당 원문을 복사서비스하고 있습니다. 아래의 원문복사신청 또는 장바구니담기를 통하여 원문복사서비스 이용이 가능합니다.

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