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HMI design of autonomous electric wheelchair for patients mobility in the hospital

AIP Conference Proceedings 2024年第1期3069卷

作者： Kadek Heri Sanjaya Yukhi Mustaqim Kusuma Sya'Bana Nugrahaning Sani Dewi Muqorob Tajalli M. Maulana Damaringrat Ryo Prasetyo Nugroho Raynaldi Aryasena Research Center for Smart Mechatronics National Research and Innovation Agency (BRIN) Bandung Indonesia Biomedical Engineering Study Program Institut Teknologi Sepuluh Nopember (ITS Surabaya) Surabaya Indonesia

With the pandemic and physical distancing requirements, there is a need for patients to be able to perform mobility with greater independence in the hospital environment. As such, the development of an autonomous electric vehicle (AEV) for a smart wheelchair is necessary. The aim of this study is to make the design concept of a human-machine interface (HMI) for a smart wheelchair. The base for the smart wheelchair is an autonomous vehicle prototype designated as an autonomous individual mobility system (AIMS). The design methodology was started by formulating the design concept, through the review of several references that have information on the HMI modalities. From those studies, we propose an HMI system for the autonomous wheelchair to be operated in the hospital. The system receives input from sensors such as color sensor, ultrasound, infra-red sensor, and an LCD touchscreen. Those sensors are connected to a microcontroller, which in turn commands the operation of the motor driver and electric motor. The control also includes smartphone control so that the patients may control the wheelchair through their interaction with the smartphone. In this conceptual design, we also consider the operational smart system to serve the patients. The concept will make the smart wheelchair become easier to use so that it will have greater accessibility to various patients.

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Expansion cooling prospects for large scale applications

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International Journal of Thermofluids 2023年 20卷

作者： Alami, Abdul Hai Alrashid, Rashid Mdallal, Ayman Yasin, Ahmad Ayoub, Mohamad Alasad, Shamma Aljaghoub, Haya Alashkar, Adnan Abdelkareem, Mohammad Ali Olabi, Abdul Ghani Orhan, Mehmet Department of Sustainable and Renewable Energy Engineering University of Sharjah P.O. Box 27272 Sharjah United Arab Emirates Sustainable Energy and Power Systems Research Centre RISE University of Sharjah P.O. Box 27272 Sharjah United Arab Emirates Department of Mechanical Engineering American University of Sharjah P.O. Box 26666 Sharjah United Arab Emirates Department of Mechatronics Engineering American University of Sharjah P.O. Box 26666 Sharjah United Arab Emirates Department of Industrial Engineering and Engineering Management University of Sharjah P.O. Box 27272 Sharjah United Arab Emirates Materials Science and Engineering PhD Program American University of Sharjah P.O. Box 26666 Sharjah United Arab Emirates Chemical Engineering Department Minia University Elminia Egypt Mechanical Engineering and Design School of Engineering and Applied Science Aston University Aston Triangle BirminghamB4 7ET United Kingdom

Air conditioning in general and cooling in particular are the biggest energy sinks among all electricity consumers. Mitigating energy needs of this sector by active or passive means is a necessity. This paper offers a comprehensive review of various cooling technologies for large scale applications and compares them in terms of economy, environmental footprint and most importantly, energy requirements. There is a main focus on the potential of using expansion cooling, which is defined in conjunction with cooling effects generated during the expansion process of a gas. The interest in such cooling technology stems from the double benefit of utilizing a large-scale compressed air energy storage (CAES) system that can also provide cooling via the expansion of air. This consequently manifests in reducing the electrical demand required for cooling applications. Such a concept is beneficial for hot climates, where most of the electrical demand is reserved for offsetting the cooling load. © 2023 The Author(s)

关键词： Compressed air energy storage

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A Parametric of Basin Geometry of Gravitational Water Vortex Power Plant

A Parametric of Basin Geometry of Gravitational Water Vortex...

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2020 International Conference on Sustainable Energy engineering and Application, ICSEEA 2020

作者： Huwae, Reza Susatyo, Anjar Subekti, Ridwan Arief Sudibyo, Henny Khaerudini, Deni Shidqi Mercu Buana University Program of Study Nagister in Mechanical Engineering Jakarta Indonesia Research Centre for Electrical Power and Mechatronics Bandung Indonesia Research Center for Physics Serpong Indonesia Department of Physics FMIPA Universitas Indonesia Depok Indonesia

ISBN: (纸本)9781728188492

Energy demand is increasing and it raise a climate change issue. Greenhouse emissions, depleted fossil energy resources, increasing fossil energy cost are reasons to maximize the utilization of renewable energy source. Hydropower extend an alternative energy source to cover the growing energy demand and release no emission at the same time for maintaining the climate change. In recent years, major focus of hydropower research is moving to small hydropower, as large hydropower opportunities are exploited and have high capital expenditure to build. A water vortex stream is a common phenomenon that we can see everyday life. Water flow out from the bathtub through outlet or water flow down in the sink after we finish washing the dishes, that is what we call vortex flow. and is a free-surface flow, homogenous fluid that contained water and air. This water vortex can be applied in low head small hydropower plant, recently known as gravitational water vortex power plant. River off Gravitational Water Vortex power plant (GWVPP) is one of low head turbine that can be used to generate electricity in small scale, pico-hydro. This study is focus on basin geometry. Models are developed to investigate the outlet diameter, depth discharge and basin geometry. It is found out that parameter of the basin should refer to source, which are flow rate, and the head of the water. It shows that spiral geometry for the basin gives symmetric and strong vortex and can be used as an alternative of conical basin. © 2020 IEEE.

关键词： Geometry

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Gravitational Water Vortex Hydropower: Experimental Investigation of Free Surface Wave in Water Intake Channel

Gravitational Water Vortex Hydropower: Experimental Investig...

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2020 International Conference on Sustainable Energy engineering and Application, ICSEEA 2020

作者： Huwae, Reza Susatyo, Anjar Subekit, Ridwan Arief Sudibyo, Henny Khaerudini, Deni Shidqi Mercu Buana University Program of Study Nagister in Mechanical Engineering Jakarta Indonesia Research Centre for Electrical Power and Mechatronics Bandung Indonesia Research Center for Physics Serpong Indonesia Department of Physics FMIPA Universitas Indonesia Depok Indonesia

ISBN: (纸本)9781728188492

Development program for construction of irrigation channel gives big opportunity for development of renewable energy from small low head hydropower source. The use of hydropower gives no negative impact to environment, especially for greenhouse emission. A gravitational vortex hydropower is the object of this study, with the focus on the water intake channel using rectangular geometry. An experimental study was conducted to find the influencing parameters on the intake section of the gravitational vortex hydropower. A set of parameters were varied to determine which parameters affecting the water surface at the intake channel. By analyzing the results of the experiments, the influence of parameters on the water intake channel of gravitational vortex hydropower was found. A performance curve for differentiation of flow type and identification of surface contour has been made. Based on the results of the experiment, placing a strainer at 5 cm distance gave 60% higher output power since this setting could reduce the wave speed. Recommendation to have further study in non-dimensional parametric should be considered for increasing efficiency of the gravitational vortex hydropower. © 2020 IEEE.

关键词： Vortex flow

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Ozone Nanobubble Water: An Effective and Environmentally Friendly Sterilizer for Fresh Produce

SSRN

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SSRN 2024年

作者： Rosalinda, S. Alam, Hilman Syaeful Yusuf, Asep Dwiratna, Sophia Mariastuty, Tantry Eko Putri Agusta, Waqif Department of Agricultural Industrial Technology Agricultural Biosystems Engineering Study Program Post-Harvest Laboratory and Process Technology Universitas Padjadjaran Jalan Raya Bandung Sumedang KM.21 Hegarmanah Kec. Jatinangor Kabupaten Jawa Barat Sumedang45363 Indonesia Research Center for Smart Mechatronics National Research and Innovation Agency Jalan Sangkuriang Bandung40135 Indonesia Agro-Industry Research Center National Research Agency National Research and Innovation Agency Jalan Sangkuriang Bandung40135 Indonesia

Washing fresh produce is crucial for removing contaminants and enhancing its appeal, yet traditional chlorine-based sanitizers often fall short of effectively eliminating surface pathogens while compromising quality. This study introduces Ozone Nanobubble Water (ONBW) as a chemical-free alternative. ONBW is produced through a specialized nozzle-type generator, dissolving ozone gas into ultrapure water to create nanobubbles, with ozone concentration regulated via Oxidation-Reduction Potential (ORP) measurements. Fresh broccoli and tomatoes were immersed in ONBW with a 1.5 mg/L ozone concentration for different durations to assess sterilization efficacy and shelf life under room temperature. The analysis encompassed contamination levels, weight loss, color, chlorophyll and lycopene content, texture, soluble solids, and respiration rate. Findings indicate that ONBW effectively reduces bacterial counts, showcasing its potential in producing sanitization. Moreover, ONBW treatment enhances vegetable quality and prolongs shelf life, preserving color, texture, and nutrients during storage. While the impact on respiration rate varies with storage conditions, nanobubble technology offers promise in mitigating quality deterioration and extending shelf life. However, further investigations are warranted to evaluate ONBW's efficacy across diverse vegetables and optimize washing parameters. © 2024, The Authors. All rights reserved.

关键词： Textures

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Analysis of ejecta ignition and velocity from 18650 Li-ion battery cells during thermal runaway

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Journal of Power Sources 2025年 653卷

作者： Vinny Gupta Matthew J. Dunn Andrew R.W. Macfarlane Tony Xiao Aamir Farooq Assaad R. Masri Department of Mechanical and Mechatronics Engineering University of Waterloo Waterloo N2L 3G1 Canada School of Aerospace Mechanical and Mechatronics Engineering The University of Sydney Sydney 2006 Australia CCRC King Abdullah University of Science and Technology Thuwal 23955-6900 Kingdom of Saudi Arabia Mechanical Engineering Program PSE. King Abdullah University of Science and Technology Thuwal 23955-6900 Kingdom of Saudi Arabia

Lithium-ion batteries are increasingly deployed across a range of energy storage applications, heightening the need to understand failure mechanisms such as thermal runaway. This study presents a new experimental platform focusing on optical accessibility to quantify the transient ejection and ignition dynamics from a single 18650-format cell with an NMC-811 cathode. High-speed optical diagnostics, including luminosity imaging, spectral emission, photodetection, and sound measurements, were employed to characterise the spatiotemporal evolution of ejected fragments and flaming ignition. Light and sound data are temporally correlated, demonstrating that ignition is followed by flame propagation that occurs rapidly and intermittently, with significant temporal variability despite consistent thermal runaway initiation temperatures. A gaseous ignition mode is identified where solid fragments ejected from the battery coated with metallic lithium ignite pyrophorically, acting as an ignition kernel for the flammable gaseous effluent. Atomic emission of neutral lithium (Li I) at 611 nm and 671 nm is detected during ignition and flaming ignition and is hypothesised to form via lithium plating or thermal decomposition of LiC 6 during thermal runaway. Atomic emission of sodium and potassium is also found, all of which is superimposed on the grey body distribution from luminous ejecta. In addition, the high-speed images are cross-correlated to provide time-resolved velocity fields and their statistical distributions of ejected particles during the entire thermal runaway event. Axial velocities possess a log-normal distribution, with peak velocities as large as 35 m s −1 . This work sets the platform for subsequent studies employing high-speed optical diagnostics to deliver a quantitative database to enable modelling of Li-ion battery thermal runaway and to understand flame-induced heating of adjacent cells in a battery module.

关键词： Lithium-ion battery Thermal runaway Ignition Venting Battery safety

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Control of an Autonomous Mobile Robot in Cluttered Environments Guided by a Single CCD Camera 19

Control of an Autonomous Mobile Robot in Cluttered Environme...

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Proceedings of the 2019 2nd International Conference on Algorithms, Computing and Artificial Intelligence

作者： Edgar Campos-Garduño Yu Tang Jianming Du Graduate Program in Engineering UNAM Mexico City Mexico UNAM Mexico City Mexico Mechatronics and Control Engineering Shenzhen University Shenzhen CHINA

ISBN: (纸本)9781450372619

Control of an autonomous robot moving in cluttered environments guided by a single CCD camera is described in this paper. The objective is to guide the mobile robot to arrive at a goal pose (position and orientation) started from an initial pose in the environment where there may be static obstacles that can be observed by the camera. The control scheme consists in three modules: the control module which ensures the exponential tracking to a desired trajectory; the on-line path/trajectory planning module which plans the desired path using LOS (Light-of-Sight) strategy and then parametrizes it into a trajectory; and the depth-estimation module which takes a sequence of target image along the path in the CCD camera mounted in the mobile robot to estimate the target Cartesian coordinate in the inertial frame and passes it to the path/trajectory module. The trajectory tracking controller and the depth observer are devised relying on the contraction analysis ensuring the exponential convergence in both designs. Simulations are included to illustrate the control scheme.

关键词： Autonomous mobile robots

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Design of LPV-PI-like controller with guaranteed performance for discrete-time systems under saturating actuators ⁎

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IFAC-PapersOnLine 2020年第2期53卷 3898-3903页

作者： Larissa S. Figueiredo Társis A.R. Parreiras Márcio J. Lacerda Valter J.S. Leite Graduate Program in Electrical Engineering - CEFET / MG & UFSJ Department of Electrical Engineering /Federal University of São João del-Rei (UFSJ) Department of Mechatronics Engineering / CEFET-MG / campus Divinópolis

This paper presents new conditions to design linear parameter-varying (LPV) state-feedback controllers for systems under saturating actuators. The proposed design ensures a minimal rate of contractivity of an associated Lyapunov function. A proportional-integral (PI) like structure is employed to ensure null tracking error for piecewise constant reference signals. Therefore, this proposal fits the design requirements of LPV and quasi-LPV real systems under saturating actuators. Experimental essays conducted on a second-order nonlinear level control illustrate the potential of the proposed approach. Additionally, the tests indicate how the contractivity rate affects the size of the estimate of the region of attraction.

关键词： LPV controller quasi-LPV systems PI like controller saturating actuators

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Evaluation of a 429 MHz Band Multiple Folded Planar Inverted-F Antenna Near the Human Body

Evaluation of a 429 MHz Band Multiple Folded Planar Inverted...

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IEEE Global Conference on Consumer Electronics (GCCE)

作者： Kanata Muto Katsuyuki Fujii Yasuyuki Okumura Graduate Program of Mechatronics Graduate School of Science and Engineering Nanzan University Nagoya Japan Nanzan University Nagoya Japan

ISBN: (数字)9781728198026

ISBN: (纸本)9781728198033

When mobile communication terminals are used, miniaturized antennas interact with the human body. For example, a planar inverted-F antenna, which is a typical small antenna, is the result of the application of various miniaturization techniques. In previous research, a multiple folded planer inverted-F antenna working at a 429 MHz band was proposed to be mounted on a housing. However, the evaluation of the performance of this equipment has not been established near the human body. Therefore, in this paper, its behavior is evaluated through simulation and measurement. The specific absorption rate is also evaluated through this simulation.

关键词： Impedance matching Mobile antennas Mobile communication Specific absorption rate Reflection coefficient Antennas Standards

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A Review: Gravitational Water Vortex Power Plant

A Review: Gravitational Water Vortex Power Plant

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2020 International Conference on Sustainable Energy engineering and Application, ICSEEA 2020

作者： Huwae, Reza Sudibyo, Henny Subekti, Ridwan Arief Susatyo, Anjar Khaerudini, Deni Shidqi Mercu Buana University Program of Study Magister in Mechanical Engineering Jakarta Indonesia Research Centre for Electrical Power and Mechatronics Bandung Indonesia Indonesian Institute of Sciences Research Centre for Electrical Power and Mechatronics Bandung Indonesia Research Center for Physics Serpong Indonesia Department of Physics FMIPA Universitas Indonesia Gedung F Fakultas MIPA Kampus UI Depok Depok Jawa Barat Indonesia

ISBN: (纸本)9781728188492

Significant population and economic growth, caused increasing of energy demand. Depletion of fossil fuel moreover coupled by climate change issue that caused by increasing carbon emission, become necessity to continuously encourage achieving renewable energy mix in energy primer. Large potentials of hydro renewable energy source and small utilization of it, micro-hydro and pico-hydro power plant are suitable to develop especially in country side. The research gap in the current turbine application chart is a challenge for Gravitational Water Vortex Power Plant (GWVPP) strong existence in pico-hydro power, besides conventional turbine design has been developed into it. However, development in vortex flow and basin geometry design has a robust design for the past 10 years of research. Researches have been conducted in few countries that proofed GWVPP has less capital investment and low operational and maintenance cost, however the parameter of the GWVPP still need further development since the power output efficiency still low. Since basin opening and outlet diameter are the main parameters to define basin geometry, inlet channel need to do further research. The research will improve the recent gaps;therefore, vortex turbine could be developed accordingly that would result immediate improvements for renewable energy growth in Indonesia through GWVPP. © 2020 IEEE.

关键词： Investments

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