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2018 International Conference on Computational Approach in Smart Systems Design and Applications, ICASSDA 2018

作者： Syaqur, Wan Abdul Ali Yeon, Ahmad Shakaff Abdullah, Abu Hassan Kamarudin, Kamarulzaman Visvanathan, Retnam Ismail, Abdul Halim Mamduh, Syed Muhammad Zakaria, Ammar Universiti Malaysia Perlis Center of Excellence for Advanced Sensor Technology School of Mechatronic Engineering M-Arau Malaysia

ISBN: (纸本)9781538683699

Mapping is one of the most important aspect in robot navigation. This project emphasizes on the mapping using Simultaneous Localization and Mapping (SLAM) using GMapping approach. Turtlebot equipped with Hokuyo Laser Range Finder (LRF) URG-04LX-UG01 is used for the mapping. The SLAM operations were done in there different locations in UniMAP, which are either indoor or mixed of indoor-outdoor environment. The results show that the indoor maps obtained are more accurate than the outdoor map. This is due to the laser scanner unable to produce accurate scan measurement in outdoor environment and therefore result in scan matching problems. © 2018 IEEE.

关键词： Mapping

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Detection of Defects on Irregularly Structured Surfaces using Supervised and Semi-Supervised Learning Methods

Detection of Defects on Irregularly Structured Surfaces usin...

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2022 Smart Systems Integration, SSI 2022

作者： Sander, Tom Lange, Sven Hilleringmann, Ulrich Geneiß, Volker Hedayat, Christian Kuhn, Harald Sensor Technology Group University of Paderborn Paderborn Germany Advanced System Engineering Fraunhofer ENAS Paderborn Germany

ISBN: (数字)9781665488495

ISBN: (纸本)9781665488495

In the manufacture of real wood products, defects can quickly occur during the production process. To quickly sort out these defects, a system is needed that finds damage in the irregularly structured surfaces of the product. The difficulty in this task is that each surface is visually different and no standard defects can be denned. Thus, damage detection using correlation does not work, so this paper will test different machine learning methods. To evaluate different machine learning methods, a data set is needed. For this reason, the available samples were recorded manually using a static fixed camera. Subsequently, the images were divided into sub-images, which resulted in a relatively small data set Next, a convolutional neural network (CNN) was constructed to classify the images. However, this approach did not lead to a generalized solution, so the dataset was hashed using the a- and pHash. These hash values were then trained with a fully supervised system that will later serve as a reference model, in the semi-supervised learning procedures. To improve the supervised model and not have to label every data point, semi-supervised learning methods are used in the following. For this purpose, the CEAL method (wrapper method) is considered in the first and then the Π-Model (intrinsically semi-supervised). © 2022 IEEE.

关键词： Convolutional neural networks

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Comparison of Energy Encryption Techniques for Near-Field WPT Security Application 20

Comparison of Energy Encryption Techniques for Near-Field WP...

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20th IEEE Student Conference on Research and Development, SCOReD 2022

作者： Ghani, S.N.A. Mohamed, L. Ali, A. University Malaysia Perlis Faculty of Electrical Engineering Technology Perlis Arau Malaysia Advanced Sensor Technology Perlis Arau02600 Malaysia

ISBN: (数字)9781665474887

ISBN: (纸本)9781665474887

This paper discusses the energy encryption techniques for wireless power transfer (WPT). The WPT system can be categorized into three groups based on power transfer distances which are near-, medium-, and far-fields. Near-field is wireless power transfer within short distance while medium-field is the wireless power transfer with range more than short distance but not more than far field distance. In the near-field, contactless techniques such as inductive coupling and capacitive coupling are employed in WPT. In the medium-field WPT, a magnetic resonant coupling approach is employed. Electromagnetic radiation is used in the far-field WPT. Energy encryption is crucial in ensuring that electricity is delivered to the intended recipient. The energy encryption methods used in the WPT system are therefore reviewed in this study. A study of several techniques reveals that the distance, effectiveness, and quantity of receivers are the primary determinants of the most appropriate energy. © 2022 IEEE.

关键词： Cryptography

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Small size 433 MHz On-off keying transceiver IC for sensor application

Small size 433 MHz On-off keying transceiver IC for sensor a...

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International SoC Design Conference, ISOCC

作者： Jeong-Ho Park Han-Won Cho Ji-Hoon Suh Hyung-Joun Yoo The Department of Electrical Engineering and the Mobile Sensor and IT Convergence Center Korea Advanced Institute of Science and Technology Daejeon Republic of Korea

ISBN: (纸本)9781479951284

In order to make wireless sensor nodes, low power consumption and low cost RF transceiver are required. In this work, a 433 MHz On-Off keying transceiver is designed and simulated with Dong-bu 0.11 μm CMOS process. For high data rate and power efficiency, digital pulse shaping is adopted. For small size and low power, the receiver is designed using the digital pulse-shaped signal for demodulation. The chip size is 180 × 180 μm 2 without pads.

关键词： CMOS integrated circuits Capacitors Radio frequency Logic gates Semiconductor device modeling

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Multi sensor voltage signal conditioner with adaptive level shift and DC offset calibration on a single chip

Multi sensor voltage signal conditioner with adaptive level ...

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International SoC Design Conference, ISOCC

作者： Ji-Hoon Suh Mauricio Velazquez Lopez Jeong-Ho Park Hyung-Joun Yoo The Department of Electrical Engineering and the Mobile Sensor and IT Convergence Center Korea Advanced Institute of Science and Technology Daejeon Republic of Korea

This paper presents an adaptive signal conditioning method for multi sensors with initial voltage setting, offset calibration and signal amplification. The initial voltage setting process to VDD/2 (600 mV) by level shifters is implemented for adapting various sensor signals, even when the signal's frequency is of several Hz or its initial voltage is of several mV. Offset calibration is implemented inside a programmable gain amplifier to compensate initial voltage setting error. The architecture can amplify various types of sensor signals below supply voltage (1.2 V) without coupling capacitors.

关键词： Electronics packaging Calibration Micromechanical devices

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Reduced graphene oxide (rGO) and 5, 10, 15, 20-tetra-p-tolyl-21H, 23H-porphine (TPTP) composite: highly reproducible and repeatable chemiresistive SO2 sensor

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Applied Physics A: Materials Science and Processing 2024年第1期130卷 1-16页

作者： Khune, Abhaysinh S. Narwade, Vijaykiran N. Dole, B.N. Ingle, Nikesh N. Tsai, Meng-Lin Hianik, Tibor Shirsat, Mahendra D. RUSA Centre for Advanced Sensor Technology Department of Physics Dr. Babasaheb Ambedkar Marathwada University MS Aurangabad431 004 India MGM University MS Aurangabad431003 India Department of Materials Science and Engineering National Taiwan University of Science and Technology Taipei10607 Taiwan Department of Nuclear Physics and Biophysics Faculty of Mathematics Physics and Informatics Comenius University Bratislava842 48 Slovakia

In the current study, a chemiresistive SO2 sensor based on a composite of reduced graphene oxide (rGO) and 5, 10, 15, 20-tetra-p-tolyl-21H, 23H-porphine (TPTP) was developed and extensively studied. Improved Hummers methods were used to synthesize graphene oxide (GO), and a thermally heating bottom-up approach was used to reduce GO to rGO. Gold electrodes were thermally coated on the transparent sheet using a thermal evaporator. The composite of rGO/TPTP was synthesized using a simple chemical method. Structural, morphological, spectroscopic, electrical, and optical studies were carried out using X-ray diffraction, atomic force microscopy, field emission scanning electron microscopy, Fourier-transfer infrared spectroscopy, Raman spectroscopy, current–voltage, and UV–vis spectroscopy, respectively. The sensing response of rGO/TPTP for various concentrations of sulfur dioxide (SO2) was investigated in chemiresistive modality. The rGO/TPTP composite chemiresistive sensor displayed exceptional performance, with a consistent response spanning 1 ppm to 10 ppm. It exhibited outstanding repeatability, linearity, stability, and boasted an impressive limit of detection (LOD) of 1 ppm. This LOD is significantly lower than the recommended permissible exposure limit (PEL) of 5 ppm set by OSHA (Occupational Safety and Health Administration), USA. The sensor based on the rGO/TPTP composite exhibited a very fast response and recovery time of 33 s. and 27 s. respectively. Graphical abstract: [Figure not available: see fulltext.] © 2024, The Author(s), under exclusive licence to Springer-Verlag GmbH, DE part of Springer Nature.

关键词： Graphene

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Random walkers based segmentation method for breast thermography

Random walkers based segmentation method for breast thermogr...

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2012 2nd IEEE-EMBS Conference on Biomedical Engineering and Sciences, IECBES 2012

作者： Moghbel, Mehrdad Mahmud, Hajjah Rozi Mashohor, Syamsiah Saripan, M. Iqbal Bin Sensor Technology Laboratory Institute of Advanced Technology UPM Serdang Malaysia Dept. of Computer and Communication Systems Faculty of Engineering UPM Serdang Malaysia

ISBN: (纸本)9781467316668

In breast thermography diagnostic, proper detection and segmentation of the areola area as well as detection of breast boundaries present the biggest challenge. As the boundaries of breasts especially in the upper quadrants are usually not present, this produces a great deal of challenge to segment breasts automatically. Many approaches have been developed to segment the breast in the past such as Snakes, Active Contours and Circular Hough Transforms, but these methods fail to detect the boundaries of the breast with the required level of accuracy especially the upper boundaries of the breast. By utilizing most recent segmentation method which is Random Walkers, the breast can be segmented accurately which in turn will increase the accuracy and the reliability of computer aided detection/diagnosis systems. © 2012 IEEE.

关键词： Image segmentation

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Growth of straight carbon nanotubes by simple thermal chemical vapor deposition

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中国有色金属学会会刊（英文版） 2006年第z1期16卷 686-691页

作者： ZOU Xiao-ping H. ABE T. SHIMIZU A. ANDO H. TOKUMOTO ZHU Shen-ming ZHOU Hao-shen Research Center for Sensor Technology Beijing Information Technology Institute Beijing 100101 China Beijing Key Laboratory for Sensor Beijing 100101 China Nanotechnology Research Institute National Institute of Advanced Industrial Science and Technology (AIST) 1-1-1 Higashi Tsukuba Ibalaki 305-8562 Japan Energy Electronics Research Institute National Institute of Advanced Industrial Science and Technology (AIST) 1-1-1 Umezono Tsukuba Ibalaki 305-8568 Japan Nanotechnology Research Institute National Institute of Advanced Industrial Science and Technology (AIST) 1-1-1 Higashi Tsukuba Ibalaki 305-8562 Japan Nano-electronics Research Institute National Institute of Advanced Industrial Science and Technology (AIST) 1-1-1 Umezono Tsukuba Ibalaki 305-8568 Japan Nanotechnology Research Institute National Institute of Advanced Industrial Science and Technology (AIST) 1-1-1 Higashi Tsukuba Ibalaki 305-8562 Japan Nanotechnology Research Center Research Institute for Electronic Science Hokkaido University Sapporo 001-0021 Japan Energy Electronics Research Institute National Institute of Advanced Industrial Science and Technology (AIST) 1-1-1 Umezono Tsukuba Ibalaki 305-8568 Japan

Straight carbon nanotubes (CNTs) were achieved by simple thermal chemical vapor deposition(STCVD) catalyzed by Mo-Fe alloy catalyst on silica supporting substrate at 700 ℃. High-resolution transmission electron microscopy images show that the straight CNTs are well graphitized with no attached amorphous carbon. Mo-Fe alloy catalyst particles play a very crucial role in the growth of straight CNTs. The straight carbon nanotubes contain much less defects than the curved nanotubes and might have potential applications for nanoelectrical devices in the future. The simple synthesis of straight CNTs may have benefit for large-scale productions.

关键词： straight carbon nanotubes simple thermal chemical vapor deposition Mo-Fe alloy catalyst

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Indoor air quality monitoring system using wireless sensor network (WSN) with web interface

Indoor air quality monitoring system using wireless sensor n...

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International Conference on Electrical, Electronics and System Engineering (ICEESE)

作者： Shaharil Mad Saad Abdul Rahman Mohd Saad Azman Muhamad Yusof Kamarudin Ammar Zakaria Ali Yeon Md Shakaff Centre of Excellence for Advanced Sensor Technology (CEASTech) University Malaysia Perlis Malaysia Universiti Malaysia Perlis Arau Perlis MY

Indoor air quality (IAQ) is a term that describes the air quality of the building occupants. IAQ can be influenced by physical factors like dust particles, chemical or gaseous pollutants (including carbon dioxide, carbon monoxide and volatile organic compounds) and biological factors like molds and bacteria growth which largely depend on temperature and humidity condition of a room. These kinds of pollutants can induce a bad health effects to building occupants. In this study, a web-based system for monitoring indoor air quality is presented. The system has been developed to monitor the environmental parameters of air quality like gaseous pollutants, particulate matter, temperature and humidity that can affect the occupant's comfort, health and indoor work environment if not properly maintained. Generally, the system consists of a desktop computer acting as base station, an array of metal oxide gas sensor, temperature and humidity sensor, particle dust sensor and wireless sensor network (WSN) node as a wireless transmitter. The measured data from sensors are sent to base station via WSN node. The computer will log the collected data using a self-developed server program which can be accessed through the web.

关键词： Wireless sensor networks Temperature sensors Buildings Temperature measurement Monitoring Base stations

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Electrical measurement on individual multi-walled carbon nanotubes

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中国有色金属学会会刊：英文版 2006年第B02期16卷 772-775页

作者：邹小平 H.ABE T.SHIMIZU A.ANDO H.OKUMOTO 朱申敏周豪慎 Research Center for Sensor Technology Beijing Information Technology Institute Beijing 100101China Beijing Key Laboratory for Sensor Beijing 100101 China Nanotechnology Research Institute National Institute of Advanced Industrial Science and Technology (AIST) 1-1-1 HigashiTsukubaIbalaki 305-8562Japan Energy Electronics Research Institute National Institute of Advanced Industrial Science and Technology (AIST)1-1-1 UmezonoTsukubaIbalaki 305-8568Japan Energy Electronics Research InstituteNational Institute of Advanced Industrial Science and Technology (AIST) 1-1-1 UmezonoTsukubaIbalaki 305-8568Japan Nanotechnology Research InstituteNational Institute of Advanced Industrial Science and Technology (AIST) 1-1-1 HigashiTsukubaIbalaki 305-8562Japan Nano-electronics Research Institute National Institute of Advanced Industrial Science and Technology (AIST) 1-1-1 Umezono Tsukuba Ibalaki 305-8568 Japan Nanotechnology Research Center Research Institute for Electronic ScienceHokkaido UniversitySapporo 001-0021Japan Energy Electronics Research InstituteNational Institute of Advanced Industrial Science and Technology (AIST) 1-1-1 UmezonoTsukubaIbalaki 305-8568Japan Energy Electronics Research Institute National Institute of Advanced Industrial Science and Technology (AIST) 1-1-1 Umezono Tsukuba Ibalaki 305-8568Japan

The characterization of electrical property of multi-walled carbon nanotubes (MWCNTs) on a nanometer scale is essential for their potential application in nano-electronic devices. The MWCNTs were synthesized on Fe2O3/SiO2/Si substrate and Pt plate substrate by simple thermal chemical vapor deposition (STCVD) technique and the electrical measurements of individual MWCNT grown on silicon substrate and Pt plate substrate were performed by home-made 'nano-manipulator', respectively. According to current-voltage curves obtained in the experiments the current density that the MWCNTs can carry is calculated to be about 107 A/cm2, which is much larger than that of normal metals.

关键词：多壁碳纳米管电学测量简易热化学汽相沉积合成

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