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- 2018
- imgae sensor
- internet of things
- drone
- visible light ID
- Optoelectronic Information Science and Engineering
- Tohoku University
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Nanotechnology-Empowered Flexible Printed Wireless Electronics
摘要： In this article, the particular importance of nanotechnology-enabled materials associated with additive manufacturing techniques for the realization of radio-frequency (RF) components and modules for Internet of Things (IoT) and millimeter-wave (mm-wave) applications is discussed. First, a look into the preparation of functional nanomaterial inks for chemical sensing applications and the surface modification processes required for their excellent printability is provided. The focus then shifts toward numerous applications realized through the implementation of the previously listed techniques. These applications discuss origami [morphing/four-dimensional (4-D)-printed] structures, taking advantage of the unique benefits of bending and folding on the printed conductive nanomaterials-based traces on a paper substrate for the fabrication of foldable reconfigurable RF architectures. Then, the synergistic integration of inkjet-printed carbon-based nanomaterials sensors with ultrahigh performance flexible printed antenna structures—utilizing nanoparticles—for the Internet of skins, smart cities, and fifth-generation (5G) applications is described. We then demonstrate the critical importance of nanomaterial-based inks in the development of robust three-dimensional (3-D)-printed RF interconnects with groundbreaking performance, opening the door for the next generation of electronics manufacturing and packaging on virtually every substrate up to frequencies in the sub-THz range.
关键词： origami structures,5G applications,additive manufacturing,millimeter-wave,nanotechnology,Internet of Things,radio-frequency,nanomaterial inks,chemical sensing,flexible electronics
更新于2025-09-04 15:30:14
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[IEEE 2018 IEEE 4th International Forum on Research and Technology for Society and Industry (RTSI) - Palermo, Italy (2018.9.10-2018.9.13)] 2018 IEEE 4th International Forum on Research and Technology for Society and Industry (RTSI) - Internet of Things for Environmental Monitoring Based on Radio Over Fiber
摘要： Radio over Fiber (RoF) is one of the main technologies for the next-generation access networks due to its immunity to electromagnetic interference, low latency, low power consumption and high transmission capacity. RoF enables the processing of several radio frequency (RF) signals in a centralized location, reducing both capital expenditures (CAPEX) and operating expenditures (OPEX). This paper describes a testbed of Internet-of-Things (IoT) for environmental monitoring based on RoF that is under development in the framework of the H2020 FUTEBOL project. Moreover, we assess the impact of RoF on network performance by using a new methodology oriented to real environments.
关键词： Arduino,Internet-of-Things,Experiments,Radio-over-Fiber,ZigBee
更新于2025-09-04 15:30:14
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A Novel Industrial Safety IoTs Architecture for External Corrosion Perception Based on Infrared
摘要： In this paper, a novel external corrosion risk online perception method is proposed to solve the dangerous external corrosion threat and supply a measurable safe risk perception ability for the industrial safe Internet of Things (IoTs) with the infrared thermal wave as the direct sensors. The three layers model is established with direct variables measuring layer, external corrosion risk soft measuring layer and monitoring cycle decision-making layer. And in the direct variable measuring layer the infrared thermal wave is applied to measure the three direct variables, area ratio of cladding defects,cladding layer thickness reading and overlapping between external and internal corrosion defects, in the direct variables measuring layer. In the external corrosion risk soft measuring layer and monitoring cycle decision-making layer, external corrosion risk can be soft measured through a cladding-condition-based risk matrix and the most optimal monitoring cycle can also be determined through a decision-making tree based on the three direct variables.
关键词： Internet of things,Industrial safety,Maintenance decision tree
更新于2025-09-04 15:30:14
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[IEEE 2018 IEEE 7th Global Conference on Consumer Electronics (GCCE) - Nara, Japan (2018.10.9-2018.10.12)] 2018 IEEE 7th Global Conference on Consumer Electronics (GCCE) - Motion Tolerance for Dynamic Object Recognition Using Visible Light IDs
摘要： Dynamic recognition of objects labeled by visible light IDs is numerically investigated for obtaining a high optical signal-to-noise ratio in received optical signals when a relative motion between the objects and observer considerably alters. An averaging effect of pixel values in an image sensor shows a trade-off between reductions in accumulated image sensor noises and spatially varying noises originating from the relative motion. Our results suggest that a real-time optimization of the averaging process is suitable for an efficient recognition of visible light IDs toward applications for the disaster risk reduction.
关键词： imgae sensor,internet of things,drone,visible light ID
更新于2025-09-04 15:30:14
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[Institution of Engineering and Technology 12th European Conference on Antennas and Propagation (EuCAP 2018) - London, UK (9-13 April 2018)] 12th European Conference on Antennas and Propagation (EuCAP 2018) - Embedded Antenna Design on LoRa Radio for IoT Applications
摘要： This paper presents a miniaturized printed inverted-F antenna (PIFA) embedded on the circuit board of a LoRa sensor node for the internet of things (IoT) applications. On the 1.6 mm-thick board, very limited space is reserved for the antenna deployment, and therefore slots are cut on the ground to reduce operating frequency of the PIFA and create another resonance to broaden the bandwidth. Finally, the proposed antenna is optimized to operate from 402.4 MHz to 441.6 MHz with voltage standing wave ratio (VSWR) less than 3, and its realized gain over the 410-441 MHz LoRa frequency band is higher than -6 dBi.
关键词： internet of things,bandwidth enhancement,LoRa,miniaturized antenna
更新于2025-09-04 15:30:14
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Towards a user preference model for interior lighting Part 1: Concept of the user preference model and experimental method
摘要： The objective and subjective factors influencing human-centric lighting design and their effect on the user of the lighting system are analysed with the aim of developing a user preference model. It is discussed how to apply this user preference model in the Internet of Things network structure of luminaires in order to obtain an ‘Internet of Luminaires’ for good user acceptance. The method of a visual experiment intended to elucidate these concepts and contribute to the user preference model is described. In the experiment, subjects assessed scene brightness, visual clarity, colour preference and scene preference in a real room. Modelling equations of these attributes will be shown and discussed in Part 2 of this work.
关键词： human-centric lighting,user preference model,colour preference,scene preference,visual clarity,scene brightness,Internet of Luminaires
更新于2025-09-04 15:30:14