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检索条件"任意字段=Conference on Advanced Sensor Systems and Applications X"

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Microdiamond-doped lead-silicate glass optical fibre for remote magnetometry

Microdiamond-doped lead-silicate glass optical fibre for rem...

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AOS Australian conference on Optical Fibre Technology (ACOFT) / Australian conference on Optics, Lasers, and Spectroscopy (ACOLS)

作者： Bai, Dongbi Huynh, Hoa Simpson, David A. Vahid, Shahraam A. Reineck, Philipp Greentree, Andrew D. Foster, Scott Ebendorff-Heidepriem, Heike Gibson, Brant C. RMIT Univ Sch Sci Melbourne Vic 3001 Australia Univ Adelaide Sch Phys Sci Inst Photon & Adv Sensing Adelaide SA 5005 Australia Univ Melbourne Sch Phys Melbourne Vic 3010 Australia Univ South Australia Sch Engn Laser Phys & Photon Devices Labs Mawson Lakes SA 5095 Australia RMIT Univ ARC Ctr Excellence Nanoscale BioPhoton Melbourne Vic 3001 Australia Def Sci & Technol Grp Edinburgh SA 5111 Australia Univ Adelaide ARC Ctr Excellence Nanoscale BioPhoton Adelaide SA 5005 Australia Univ Adelaide Inst Photon & Adv Sensing Adelaide SA 5005 Australia

ISBN: (纸本)9781510631410

We demonstrate fabrication and characterizations of intrinsically magneto-sensitive fiber with potential applications as a high-efficiency remote magnetic field sensing platform. The fibre was fabricated using lead-silicate glass and the rod-in-tube fibre drawing technique. The thin glass rod of similar to 1 mm diameter was first coated with nitrogen-vacancy (NV) centre-enriched diamond particles of similar to 1 mu m diameter, and subsequently inserted into the glass outer tube. This rod-in-tube assembly was drawn down to fibre, with the diamond particles distributed at the fused interface between rod and tube. We experimentally coupled 532 nm continuous-wave laser into a 30-cm-length fibre piece from the fibre endface, and examined the photoluminescence (PL) properties of the fibre from both the side of the fibre and the output end of the fibre. PL mapping results showed that the glass-embedded NV emitters showed bright and photostable fluorescence, demonstrating characteristic NV centre zero phonon line emission. Moreover, the mapping result obtained at the output end of fibre indicated that the transmitted NV fluorescence was coupled into the propagation modes of the fibre. By using optically detected magnetic resonance (ODMR) from the NV ensemble along the fibre, we demonstrate detection of local magnetic fields via longitudinal excitation and side collection. Based on the current light transmission and collection configuration, the hybrid diamond-glass optical fibre sensor demonstrated a shot noise-limited DC magnetic field sensitivity of 3.7 mu T/vHz at room temperature. Our results open the possibility of robust, field-deployable fibre optical magnetometry.

关键词： Fiber design and fabrication fiber optics sensors defect-center materials magneto-optic systems

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A multi-sensor based online tool condition monitoring system for milling process 51

A multi-sensor based online tool condition monitoring system...

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51st CIRP conference on Manufacturing systems (CIRP CMS)

作者： Zhang, x. Y. Lu, x. Wang, S. Wang, W. Li, W. D. Coventry Univ Fac Engn Environm & Comp Coventry CV1 5FB W Midlands England Univ Skovde Dept Prod & Automat Engn S-54128 Skovde Sweden

Tool condition monitoring has been considered as one of the key enabling technologies for manufacturing optimization. Due to the high cost and limited system openness, the relevant developed systems have not been widely adopted by industries, especially Small and Medium-sized Enterprises. In this research, a cost-effective, wireless communication enabled, multi-sensor based tool condition monitoring system has been developed. Various sensor data, such as vibration, cutting force and power data, as well as actual machining parameters, have been collected to support efficient tool condition monitoring and life estimation. The effectiveness of the developed system has been validated via machining cases. The system can be extended to wide manufacturing applications. (C) 2018 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the scientific committee of the 51st CIRP conference on Manufacturing systems.

关键词： Tool condition monitoring Multipe sensors Vibration

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A Multi-layer Industrial-IoT Attack Taxonomy: Layers, Dimensions, Techniques and Application

A Multi-layer Industrial-IoT Attack Taxonomy: Layers, Dimens...

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IEEE International conference on Trust, Security and Privacy in Computing and Communications (TrustCom)

作者： Syed Ghazanfar Abbas Fabiha Hashmat Ghalib A. Shah IRIL-KICS University of Engineering & Technology Lahore Pakistan

ISBN: (数字)9781665403924

ISBN: (纸本)9781665403931

Industrial IoT (IIoT) is a specialized subset of IoT which involves the interconnection of industrial devices with ubiquitous control and intelligent processing services to improve industrial system's productivity and operational capability. In essence, IIoT adapts a use-case specific architecture based on RFID sense network, BLE sense network or WSN, where heterogeneous industrial IoT devices can collaborate with each other to achieve a common goal. Nonetheless, most of the IIoT deployments are brownfield in nature which involves both new and legacy technologies (SCADA (Supervisory Control and Data Acquisition System)). The merger of these technologies causes high degree of cross-linking and decentralization which ultimately increases the complexity of IIoT systems and introduce new vulnerabilities. Hence, industrial organizations becomes not only vulnerable to conventional SCADA attacks but also to a multitude of IIoT specific threats. However, there is a lack of understanding of these attacks both with respect to the literature and empirical evaluation. As a consequence, it is infeasible for industrial organizations, researchers and developers to analyze attacks and derive a robust security mechanism for IIoT. In this paper, we developed a multi-layer taxonomy of IIoT attacks by considering both brownfield and greenfield architecture of IIoT. The taxonomy consists of 11 layers 94 dimensions and approximately 100 attack techniques which helps to provide a holistic overview of the incident attack pattern, attack characteristics and impact on industrial system. Subsequently, we have exhibited the practical relevance of developed taxonomy by applying it to a real-world use-case. This research will benefit researchers and developers to best utilize developed taxonomy for analyzing attack sequence and to envisage an efficient security platform for futuristic IIoT applications.

关键词： Wireless sensor networks Taxonomy Organizations Complexity theory Security Steel Industrial Internet of Things

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Design and Implementation of IoT Testbed with Improved Reliability using Conditional Probability Techniques

Design and Implementation of IoT Testbed with Improved Relia...

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International conference on I-SMAC (IoT in Social, Mobile, Analytics and Cloud) (I-SMAC)

作者： Kayalvizhi Jayavel Kanagaraj Venusamy G. Lavanya School of Computing SRM Institute of Science and Technology Kattankulathur Chennai India University of Technology and Applied Sciences-Al musannah Muladdha Sultanate of Oman SRM Institute of Science and Technology Kattankulathur Chennai India

ISBN: (数字)9781728154640

ISBN: (纸本)9781728154657

Internet of Things (IoT) test beds are widely used by developers predominantly. Off late, Test beds are being used by data analysts, academicians, industrial persons and hardware ardent. The real purpose of test beds, is to achieve accurate testing results, mimicking the real time environment to the extent possible which is otherwise not possible to reproduce using simulators. As predicted by many industrial giants IoT based devices will reach the scale of billions by 2015. The applications and opportunities they create will also be innumerable. This has created a huge demand for such testing grounds, because a system deployed without proper testing may be vulnerable and sometimes disastrous. Thus our research aims to explore the qualities of test beds, the services they offer and how to enhance the performance of test beds. Our test bed framework is designed and developed with open-source boards to achieved heterogeneity, reusability, interoperability and scalability. This framework would like to be addressed as a utility, with “x” as service: data, sensor client, actuator client, and platform. To achieve this, APIs which is platform and language independent has been developed and provides third-party developer support. The APIs developed have shown considerable improvement in terms of data transfer rate, database upload and retrieval, and user responsiveness. Thus, our framework is capable of offering services through our API. And have demonstrated with the help of conditional probability techniques enhancement in performance and reusability, visualized the same in terms of graphs and datasets.

关键词： Scalability Reliability engineering Real-time systems Internet of Things Open source software Interoperability Testing

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Exoskeleton-covered soft finger with vision-based proprioception and tactile sensing

Exoskeleton-covered soft finger with vision-based propriocep...

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IEEE International conference on Robotics and Automation (ICRA)

作者： Yu She Sandra Q. Liu Peiyu Yu Edward Adelson Massachusetts Institute of Technology

ISBN: (数字)9781728173955

ISBN: (纸本)9781728173962

Soft robots offer significant advantages in adaptability, safety, and dexterity compared to conventional rigid-body robots. However, it is challenging to equip soft robots with accurate proprioception and tactile sensing due to their high flexibility and elasticity. In this work, we describe the development of a vision-based proprioceptive and tactile sensor for soft robots called GelFlex, which is inspired by previous GelSight sensing techniques. More specifically, we develop a novel exoskeleton-covered soft finger with embedded cameras and deep learning methods that enable high-resolution proprioceptive sensing and rich tactile sensing. To do so, we design features along the axial direction of the finger, which enable high-resolution proprioceptive sensing, and incorporate a reflective ink coating on the surface of the finger to enable rich tactile sensing. We design a highly underactuated exoskeleton with a tendon-driven mechanism to actuate the finger. Finally, we assemble 2 of the fingers together to form a robotic gripper and successfully perform a bar stock classification task, which requires both shape and tactile information. We train neural networks for proprioception and shape (box versus cylinder) classification using data from the embedded sensors. The proprioception CNN had over 99% accuracy on our testing set (all six joint angles were within 1° of error) and had an average accumulative distance error of 0.77 mm during live testing, which is better than human finger proprioception. These proposed techniques offer soft robots the high-level ability to simultaneously perceive their proprioceptive state and peripheral environment, providing potential solutions for soft robots to solve everyday manipulation tasks. We believe the methods developed in this work can be widely applied to different designs and applications.

关键词： Soft robotics Cameras Robot vision systems Ink

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Liquid sensor Based On Optical Surface Plasmon Resonance in a Dielectric Waveguide

Liquid Sensor Based On Optical Surface Plasmon Resonance in ...

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conference on Micro- and Nanotechnology sensors, systems, and applications x

作者： Tabbakh, Thamer LiKamWa, Patrick CREOL Coll Opt & Photon Dept Elect & Comp Engn Orlando FL 32816 USA Univ Cent Florida Orlando FL 32816 USA King Abdulaziz City Sci & Technol Riyadh 11442 Saudi Arabia

ISBN: (数字)9781510617902

ISBN: (纸本)9781510617902

In this work, we have demonstrated an optical surface Plasmon resonance (SPR) sensor head that is based on an inverted rib dielectric waveguide, in which the resonance wavelength of the surface plasmon excited at the gold metal-dielectric interface changes in relation to changes of the environment at the top metal surface. The inverted-rib waveguide of the SPR sensor head is made of a layer of SU-8 polymer with a refractive index of 1.5 while the lower cladding layer consists of silicon oxynitride (SiO Ny) with a refractive index of 1.526. The top surface is coated with a 50 nm thick layer of gold. The SPR sensor head was designed to allow monitoring of analyte media with a refractive index ranging from 1.44 to the 1.502. Using a set of reference liquids representing the analyte medium, the sensitivity of the SPR sensor was measured using a broadband light source and a optical spectrum analyzer. It was found that with a liquid of 1.442 refractive index in contact with the gold metal, a sharp resonance dip in the transmission spectrum occurred at 1525 nm and its position shifted to 1537 nm when a liquid of 1.502 was used. From these measurements, the sensitivity of the sensor devices wasdetermined to be S = 232 ***-1. We demonstrate that this device can potentially be totally integrated with a wavelength tunable light source, a photodetection unit as well as a liquid delivery system via microfluidic channels making it an extremely compact unit.

关键词： Biosensor surface plasmon inverted rip waveguide fabrication optical sensor

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From Heterogeneous sensor Networks to Integrated Software Services: Design and Implementation of a Semantic Architecture for the Internet of Things at ARCES@UNIBO 23

From Heterogeneous Sensor Networks to Integrated Software Se...

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23rd conference of Open Innovations Association FRUCT, FRUCT 2018

作者： Aguzzi, Cristiano Antoniazzi, Francesco Azzoni, Paolo Bononi, Luciano Brasini, Francesco Canegallo, Roberto D'Elia, Alfredo De Lisa, Angelo Felice, Marco Di Franchi, Eleonora Perilli, Luca Roffia, Luca Sciullo, Luca Siagri, Roberto Verardi, Martina Cinotti, Tullio Salmon University of Bologna Bologna Italy 33020 Italy STMicroelectronics Agrate Brianza Italy

ISBN: (纸本)9789526865362

The Internet of Things (IoTs) is growing fast both in terms of number of devices connected and of complexity of deployments and applications. Several research studies analyzing the economical impact of the IoT worldwide identify the interoperability as one of the main boosting factor for its growth, thanks to the possibility to unlock novel commercial opportunities derived from the integration of heterogeneous systems which are currently not interconnected. However, at present, interoperability constitutes a relevant practical issue on any IoT deployments that is composed of sensor platforms mapped on different wireless technologies, network protocols or data formats. The paper addresses such issue, and investigates how to achieve effective data interoperability and data reuse on complex IoT deployments, where multiple users/applications need to consume sensor data produced by heterogeneous sensor networks. We propose a generic three-tier IoT architecture, which decouples the sensor data producers from the sensor data consumers, thanks to the intermediation of a semantic broker which is in charge of translating the sensor data into a shared ontology, and of providing publish-subscribe facilities to the producers/consumers. Then, we describe the real-world implementation of such architecture devised at the advanced Research Center on Electronic System (ARCES) of the University of Bologna. The actual system collects the data produced by three different sensor networks, integrates them through a SPARQL Event Processing Architecture (SEPA), and supports two frontend applications for the data access, i.e., a web dashboard and an Amazon Alexa voice service. © 2018 FRUCT Oy.

关键词： Interoperability

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6LoWPAN Protocol in Fixed Environment: A Performance Assessment Analysis

6LoWPAN Protocol in Fixed Environment: A Performance Assessm...

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IEEE International conference on Intelligent Data Acquisition and advanced Computing systems

作者： Nin Hayati Mohd Yusoff Nurul Azma Zakaria Axel Sikora Jubin Sebastian E Faculty of Information and Communication Technology Universiti Teknikal Malaysia Melaka Malaysia Faculty of Information and Communication Technology Center for Advanced Computing Technology Universiti Teknikal Malaysia Melaka Malaysia Institute of Reliable Embedded Systems and Communication Electronics Offenburg University of Applied Sciences Offenburg Germany

The Internet of Things (IoT) application has becoming progressively in-demand, most notably for the embedded devices (ED). However, each device has its own difference in computational capabilities, memory usage, and energy resources in connecting to the Internet by using Wireless sensor Networks (WSNs). In order for this to be achievable, the WSNs that form the bulk of the IoT implementation requires a new set of technologies and protocol that would have a defined area, in which it addresses. Thus, IPv6 Low Power Area Network (6LoWPAN) was designed by the Internet Engineering Task Force (IETF) as a standard network for ED. Nevertheless, the communication between ED and 6LoWPAN requires appropriate routing protocols for it to achieve the efficient Quality of Service (QoS). Among the protocols of 6LoWPAN network, RPL is considered to be the best protocol, however its Energy Consumption (EC) and Routing Overhead (RO) is considerably high when it is implemented in a large network. Therefore, this paper would propose the HRPL to enchance the RPL protocol in reducing the EC and RO. In this study, the researchers would present the performance of RPL and HRPL in terms of EC, Control traffic Overhead (CTO) and latency based on the simulation of the 6LoWPAN network in fixed environment using COOJA simulator. The results show HRPL protocol achieves better performance in all the tested topology in terms of EC and CTO. However, the latency of HRPL only improves in chain topology compared with RPL. We found that further research is required to study the relationship between the latency and the load of packet transmission in order to optimize the EC usage.

关键词： Protocols Topology Energy consumption Network topology Internet of Things Routing

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Fiber-optic current and voltage sensors for electric power transmission systems 15

Fiber-optic current and voltage sensors for electric power t...

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conference on Fiber Optic sensors and applications xV

作者： Bohnert, Klaus Frank, Andreas Mueller, Georg M. Yang, Lin Lenner, Miklos Gabus, Philippe Gu, xun Marchese, Sergio V. ABB Switzerland Ltd Corp Res CH-5405 Baden Switzerland ABB Switzerland Ltd High Voltage Prod CH-5430 Wettingen Switzerland

ISBN: (数字)9781510618206

ISBN: (纸本)9781510618206

Optical current and voltage sensors have become attractive alternatives to conventional instrument transformers in high voltage electric power transmission systems. The optical sensors offer important benefits such as small size and weight, enhanced performance, and constitute an important part of the transition to digital substations. The sensors must comply with stringent accuracy and reliability requirements. Commonly, substation applications demand accuracy to within +/- 0.2% over outdoor temperature ranges. Other aspects are insensitivity to shock and vibration and stray fields as well as life times in excess of 30 years. We review the technology of the sensors and present particular measures that were necessary to achieve the required performance. This includes the exploration of different sensing fiber types, inherent temperature compensation, accelerated life tests, and, in case of voltage sensors, adequate high voltage proof insulation and packaging. We discuss the integration of a current sensor into a circuit breaker and show results from a corresponding field test.

关键词： Fiber-optic current sensor optical voltage sensor current measurement voltage measurement Faraday effect Pockels effect

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sensor System Power Adaptation for Automated Vehicles

Sensor System Power Adaptation for Automated Vehicles

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IEEE International conference on Intelligent Computer Communication and Processing (ICCP)

作者： Matti Kutila Ari Virtanen Mikko Tarkiainen Pertti Peussa VTT Technical Research Center of Finland Ltd. Tampere FINLAND

There are two mega-trends in the automotive industry for converting the way of traveling in the future. One is the transition from combustion engines to electric vehicles and the second promotes an increased level of automation in future cars. However, automation requires exceptionally high quality environment perception data and various sensor devices, each taking their own share from the vehicle energy storage, which reduces the driving range of electric vehicles. This article proposes an improved ability to save the energy of a vehicle through advanced sensor systems with an adaptive power management of the environment perception system. At low speeds the sensor system is set to a minimal power scheme and at high speed or in adverse weather conditions a high power scheme is used to increase the available sensing range. In addition, it also makes it possible to use V2x communication to restrict sensor power or prohibit the use of certain sensors in radiation sensitive environments.

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