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检索条件"机构=Advanced Sensor Technology"

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Inhalation and Exhalation Detection for Sleep and Awake Activities Using Non-Contact Ultra-Wideband (UWB) Radar Signal 5

Inhalation and Exhalation Detection for Sleep and Awake Acti...

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5th International Conference on Electronic Design, ICED 2020

作者： Ariffin, Fatin Fatihah Shamsul Kamarudin, Latifah Munirah Ghazali, Najah Nishizaki, Hiromitsu Zakaria, Ammar Zakaria, Syed Muhammad Mamduh Bin Syed Centre of Advanced Sensor and Technology Universiti Malaysia Perlis Malaysia School of Computer and Communication Engineering Universiti Malaysia Perlis Malaysia Institute of Engineering Mathematics Universiti Malaysia Perlis Malaysia Integrated Graduate School of Medicine Engineering and Agricultural Sciences University of Yamanashi Japan

Respiratory is one of the vital signs used to monitor the progression of the illness that are important for clinical and health care fields. From home rehabilitation to intensive care monitoring, the rate of respiration must be constantly monitored as it offers a proactive approach for early detection of patient deterioration that can be used to trigger therapeutic procedures alarms. The use of invasive procedures based on contact transducers is typically necessary to measure the quantity. Nevertheless, these procedures might be troublesome due to the inconvenience and sensitivity of physical contact. Therefore, non-contact human breathing monitoring as a non-invasive procedure is important in long term intensive-care and home healthcare applications. In this paper, respiratory signals from two type of resting activities had been acquired and proposed a Deep Neural Network (DNN) model that can classify the respiratory signal into inhalation and exhalation signal. Several pre-processing techniques has been done onto the signal before it is implemented into the proposed model. The average recognition rate of the respiratory signal using the proposed method was 84.1% when the subject was sleeping and 83.8% when awake. © 2021 Published under licence by IOP Publishing Ltd.

关键词： Ultra-wideband (UWB)

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A comparative study of sio2:Tio2 composite and sio2 film by sol-gel method for solar cell application 19th

A comparative study of sio2:Tio2 composite and sio2 film by ...

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19th International Workshop on Physics of Semiconductor Devices, IWPSD 2017

作者： Chatterjee, Kausturi Ray, Soma Pal, Baishakhi Adhikary, Kalyan Gangopadhyay, Utpal Mandal, Ratan Centre of Advanced Research in Renewable Energy and Sensor Technology MSIT TIG KolkataWest Bengal700150 India Centre of Excellence for Green Energy and Sensor System IIEST Shibpur HowrahWest Bengal711103 India Department of Physics Jadavpur University KolkataW.B700032 India School of Energy Studies Jadavpur University KolkataW.B700032 India

ISBN: (纸本)9783319976037

Thin films of SiO2 and SiO2–TiO2 composite sol were spin coated on textured monocrystalline silicon wafer and clean glass using Tetraethyl orthosilicate (TEOS) and Titanium tetraisopropoxide (TTIP) as main precursors. For further improvement of the films quality, DMF (dimethylformamide) was added into the solutions to reduce the cracks of the film. The average reflectance of the composite and oxide films was 8.8 and 6.81%, whereas textured monocrystalline silicon (without any coating) wafer having a reflectance of 13.20%. Both the films were annealed at different temperatures ranging from 400 to 900 °C with an interval of 100 °C. After annealing minority carrier lifetime significantly changes from 3.26 to 40.5 µs at 800 °C for oxide film and for composite it was 3.51–45.29 µs at 800 °C. These results show that both the films can be used as an ARC (anti-reflection coating) as well as a passivation layer for solar cell application. © Springer Nature Switzerland AG 2019.

关键词： Silica

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Development and Characterization of CMOS-based Monolithic X-ray Imager sensor

Development and Characterization of CMOS-based Monolithic X-...

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2007 IEEE Nuclear Science Symposium Conference, vol.5

作者： Gyuseong Cho Bo Kyung Cha Jun Hyung Bae Byoung-Jik Kim Sung Chae Jeon Young-Hee Kim Gyu-Ho Lim Department of Nuclear and Quantum Engineering Korea Advanced Institute of Science and Technology Daejeon South Korea KERI Electro-bio sensor research group Gyeonggi South Korea Department of Electric Engineering Changwon NatE28099l University Changwon South Korea

We proposed a new design of CMOS-based X-ray image sensor with monolithically grown pixellated CsI(TI) on photosensor area for securing the maximally achievable spatial resolution for a given sensitivity determined by the CsI(Tl) thickness at a certain X-ray energy. The test version of a CMOS image sensor (CIS) was designed and fabricated using AMIS 0.5μm standard CMOS process. The chip includes an 128×128 CMOS active pixel sensor (APS) array with 50μm pitch, a row/column decoder, a sample & hold circuit with buffers, an analog signal processor (ASP) and a 10 bit pipe-lined analog-to-digital converter (ADC). A data acquisition system (DAS) for operating the image sensor and for processing digital signals was also developed. Then the X-ray image sensor was fabricated by depositing thermally evaporated CsI(Tl) blocks of 50μm thick on each pixel sensor of CIS using a photo-resist pattern as a basis of CsI(Tl) deposition. Linearity of the response, dark current noise, dynamic range and spatial resolution etc. were measured with bare and scintillator-coupled CIS image sensors by green LED light and X-ray beam respectively. The mean charge generation rate per pixel measured at room temperature in the dark was about 45,600 electrons/sec which results in he electronic noise of 210 electrons for 1sec exposure time. Therefore the dynamic range is ～67 dB if we consider the statistical noise together. The spatial resolution of scintillator-coupled CMOS image sensor was measured to be ～7 lp/mm by a lead line pattern and 80 kVp X-ray. This works was supported by Nuclear R&D Program of MOST, Korea through KOSEF.

关键词： X-ray imaging Image sensors sensor phenomena and characterization Spatial resolution CMOS image sensors Computational Intelligence Society Pixel CMOS process sensor arrays Signal processing

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Modeling and simulation of arbitrary ordered nonlinear charge-pump phase-locked loops

Modeling and simulation of arbitrary ordered nonlinear charg...

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Semiconductor Conference Dresden

作者： C. Wiegand C. Hangmann C. Hedayat U. Hilleringmann Department of Sensor Technology University of Paderborn Paderborn Germany Department Advanced System Engineering (ASE) Fraunhofer ENAS Paderborn Germany

The simulation of charge-pump phase-locked loops (CP-PLL) is a challenge within the design. The problem is related to the mixed-signal and nonlinear behavior as well as the existence of high and low frequency functional blocks. Here a methodology is presented for the efficient and accurate simulation and analysis of the transient characteristic. For this, nonidealities like dead-zone, current/timing mismatches, leakage current and the nonlinear voltage controlled oscillator characteristic are considered. Moreover, the proposed technique is applied to CP-PLL systems with arbitrary loop filters by using the solution of the analog parts of the differential equation system and by solving the phase equation of the system with regard to the switching instant of time of the phase and frequency detector.

关键词： Mathematical model Charge pumps Voltage-controlled oscillators Equations Phase frequency detector Phase locked loops Leakage current

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A Methodology for Verifying and Validating the Functional Performance Evaluation of High-Fidelity RADAR sensor Models at Raw Data and Detection Levels

A Methodology for Verifying and Validating the Functional Pe...

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International Conference on Vision, Image and Signal Processing (ICVISP)

作者： Arsalan Haider Lukas Haas Abduelkadir Eryildirim Thomas Zeh Shotaro Koyama Nils Henning Müllner Martin Jakobi Alexander W. Koch IFM-Institute for Driving Assistance and Connected Mobility Kempten University of Applied Sciences Germany Institute for Measurement Systems and Sensor Technology Technical University of Munich Germany Infineon Technologies Austria AG Advanced Vehicle Research Institute Kanagawa Institute of Technology Japan Institute of Transportation Systems German Aerospace Center DLR Germany

ISBN: (数字)9798331541460

ISBN: (纸本)9798331541477

This paper outlines a comprehensive methodology for verifying and validating the functional performance evaluation of high-fidelity radio detection and ranging (RADAR) sensor models at both the raw data level, specifically the range map (RM) and range-Doppler map (RDM), and the detection level. Three key performance parameters (KPPs) are defined at the raw data level: the target's received power, signal-to-noise ratio (SNR), and twoway beam pattern. Four KPPs are identified at the detection level: distance, relative radial velocity, azimuth angle, and elevation angle. This study also introduces three dynamic test scenarios directly applicable to the functional evaluation assessment of RADAR sensor models. Furthermore, a toolchain is presented to integrate real-world test scenarios into the virtual environment, allowing for frame-by-frame validation of the RADAR sensor models' functional evaluation. Quantitative analysis successfully assesses differences between simulations and real measurements, employing the mean absolute percentage error (MAPE) metric. This methodology has been successfully applied to a high-fidelity RADAR sensor model featuring a multiple input and multiple output (MIMO) 2D linear spacing virtual antenna and a complete signal processing toolchain that mimics real RADAR sensors. Results show a strong correlation between the simulation and real measurements, with MAPE values below 7 % for all defined KPPs at raw data and detection levels. Using this methodology, developers can assess whether virtual RADAR sensors are ready for environmental perception during scenario-based automated driving system (ADS) testing.

关键词： Performance evaluation Correlation Radar detection Radar Radar antennas Data models Radar signal processing Distance measurement Signal to noise ratio Testing

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Remote platform for lung monitoring based on Electrical Impedance Tomography measurements 19

Remote platform for lung monitoring based on Electrical Impe...

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19th IEEE International Multi-Conference on Systems, Signals and Devices, SSD 2022

作者： Hafsa, Mariem Bchir, Ons Bader, Oumaima Ben Amara, Najoua Essoukri Kanoun, Olfa Université de Sousse Ecole Nationale d' Ingénieurs de Sousse LATIS- Laboratory of Advanced Technology and Intelligent Systems Sousse4023 Tunisia Professorship of Measurement and Sensor Technology Technische Universität Chemnitz Chemnitz Germany University of Sousse National EngineeringSchool of Sousse Computer Engineering Department Sousse Tunisia

ISBN: (数字)9781665471084

ISBN: (纸本)9781665471084

Electrical Impedance Tomography (EIT) is a non-invasive, non-ionizing medical imaging method that has been on the rise in biomedical field. For lung monitoring, electrodes are attached around patient's thorax. Several boundary voltages are measured on the surface of these electrodes, which result from the injection of a small alternating current. Based on these measurements, the inner conductivity distribution of the patient's lung can be determined and used for monitoring and diagnosis. EIT can be used for extended periods of time, which makes it ideal for continuous monitoring, especially for intensive care patients. Several stationary EIT-based lung monitoring platforms have been developed for this reason. In this work, however, we propose a web and cloud-based monitoring solution that allows remote access for the doctors and medical staff. The implemented solution provides real-time, continuous monitoring as well as a visualization of extracted lung features that aid the diagnosis, © 2022 IEEE.

关键词： Electrodes

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Flexible and sensitive foot pad for sole distributed force detection

Flexible and sensitive foot pad for sole distributed force d...

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IEEE Conference on Nanotechnology

作者： Morteza Amjadi Min Seong Kim Inkyu Park Mobile Sensor and IT Convergence (MOSAIC) Center KAIST South Korea Korea Advanced Institute of Science and Technology Daejeon Daejeon KR

ISBN: (纸本)9781479956234

We develop highly flexible and compressible 3D interconnected porous PDMS structures by using sugar cubes as templates. The porous structures can be compressed to more than 80% without any side-wall buckling comparable with bulk polymers. Force sensitive resistors were fabricated by filtration of the CNT solution inside the porous structure of PDMS. We found that sufficient acid treatment can increase the adhesion and bonding between CNTs and PDMS. Force sensitive resistors respond the applied pressure and compressive strains by high linearity (R 2 >0.97) and sensitivity (GFs>2) with a reliable manner. Finally, as an application of our force sensitive resistors, a flexible foot pad containing force sensitive resistors arrays is developed for the foot sole distributed force detection.

关键词： Sugar Robot sensing systems Foot Strain Surface treatment Plastics Adhesives

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Node Fault Diagnosis in WSN Based on RS and SVM

Node Fault Diagnosis in WSN Based on RS and SVM

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Wireless Communication and sensor Network, Intl Conference on

作者： Cheng-Bo Yu Jing-Jing Hu Rui Li Shun-Hua Deng Ru-Min Yang Time Grating Sensor and Advanced Detection Technology City Key Laboratory of Chongqing Chongqing China Remote Test and Control Institute Chongqing University of Technology

ISBN: (纸本)9781479970926

In the wireless sensor network (WSN), the operation reliability is usually evaluated by processing measured datas at network nodes. As the traditional algorithms exist the problems of the complex calculation and large energy consumption, a method for fault diagnosis of nodes in WSN based on rough set theory (RS) and support vector machine (SVM) is proposed in this paper. In this paper, we collect various kinds of fault symptoms and integrate them first and then diagnose the fault nodes through rough set theory (RS) and support vector machine (SVM). Firstly, the rough set theory is used to reduce the attributes of sampling data in order to select the decision-making attributes for constituting a new simple dataset. Then we use the new simple dataset to train the SVM. And finally classify failure modes of WSN through the trained SVM model. The result shows with RS-SVM the diagnosis time is only 0.16s and the diagnosis accuracy is up to 95%. The algorithm in this paper makes full use of the RS and the SVM and the result shows the effectiveness of the algorithm in fault diagnosis of WSN, and also shows it can improve the efficiency and accuracy of fault diagnosis.

关键词： Wireless sensor networks Support vector machines Fault diagnosis Accuracy Mathematical model Set theory Wireless communication

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Heat distribution of aluminum block with profile for portable thermal cycler calculated using finite element method 5

Heat distribution of aluminum block with profile for portabl...

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5th Asian Conference on Thermoelectrics and the 6th Southeast Asia Conference on Thermoelectrics, ACT and SACT 2020

作者： Sakti, S.P. Abdurrouf Kusuma, F.J. Sensor Technology Laboratory Department of Physics Brawijaya University Jl. Veteran Malang65145 Indonesia Collaborative Research Centre for Advanced Systems and Material Technology Brawijaya University Jl. Veteran Malang65145 Indonesia Computational Physics Laboratory Department of Physics Brawijaya University Jl. Veteran Malang65145 Indonesia

Polymerase Chain Reaction (PCR) becomes one of the essential tools during the COVID pandemic. The heart of the PCR is a thermal cycler. The thermal cycler is a temperature cycle instrument that changes and maintains the vial sample's temperature at a specific target temperature. A simple thermal cycler can be made using thermoelectric as the heater and cooler to control the temperature state. The thermal block temperature distribution is important to make all the vials treated at the same temperature condition. The thermal distribution of an aluminum block as the thermal block for a portable PCR was calculated using the finite element method. The heat source and cooler with a power of 60W were placed at the bottom of the aluminum block. The temperature gradient inside the aluminum body, where the vial was placed, was calculated. The heating and cooling speed were calculated using the model. It was found that the temperature difference between the bottom surface and top surface of the aluminum block is 2.5°C during the transient time. The temperature distribution in a horizontal direction is homogenous, with a temperature difference among the surface being less than 0.01°C. The time required to heating from 24°C to 95°C is 31.05 seconds while cooling from 95°C to 55°C can be reached in 18.05 seconds. © 2021 Institute of Physics Publishing. All rights reserved.

关键词： Finite element method

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Fabrication and characteristics of an FET-type charge sensor for detecting DNA sequence

Fabrication and characteristics of an FET-type charge sensor...

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International Conference on Microprocesses and Nanotechnology

作者： Yong-Taek Jeong Dong-Sun Kim Hong-Kun Lyu Hey-Jung Park Hyoung Sik Kim Jang-Kyoo Shin Pyung Choi Jong-Hyun Lee G. Lim M. Ishida School of Electronic & Electrical Eng Daegu South Korea School of Electronic & Electrical Eng. Dept. of Sensor Eng. Kyungpook National Univ Daegu Korea Bio-Chip Project Team Samsung Advanced Institute of Technology Korea Dept. of Electrical & Electronic Eng Toyohashi Univ. of Technology Japan

The authors have fabricated an FET-type DNA charge sensor which can detect DNA sequence by sensing a the variation of drain current due to DNA hybridization and investigated its electrical characteristics.

关键词： Fabrication sensor phenomena and characterization DNA Sequences Intelligent sensors Current measurement MOSFET circuits Chemical sensors Biomedical optical imaging Optical sensors

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