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Real Time Experimental Calibration of Ultrasonic sensor and LoRa Communication module in LoRaWAN Architecture

Real Time Experimental Calibration of Ultrasonic Sensor and ...

引用

international conference on Vision Towards Emerging Trends in Communication and Networking (ViTECoN)

作者： K Gurubaran Poornesh S Shwetha L S Parameswaran Ramesh Vidhya N P.T.V. Bhuvaneswari Department of Electronics Engineering Madras Institute of Technology Anna University Chennai India

Internet of Things (IoT) is the promising technology that is predominantly used in most of the automation applications in recent years. When employing IoT in remote monitoring applications, the devices used are mostly battery-operated; hence, to prolong the lifetime of the application, the technology that uses less energy while offering an extensive range becomes vital. The technologies currently used in building IoT applications are Wi-Fi, Bluetooth, and Zig-Bee, which fail to meet the above essential requirements. LoRa (Long Range) is the alternate technology that addresses the above requirement. The objective of this work is to provide insight into LoRa, detailing its merits and demerits. Further, from the comprehensive literature survey, it is found that ultrasonic sensors are predominantly used in IoT-based applications that involve detection of level and proximity, as well as determining the status of available parking spaces in a parking lot. Hence, this research also details the procedure involved in this sensor calibration and its usage in LoRa based IoT architecture in real time. The performance of the sensor and communication module is validated in terms of accuracy and range on the LoRaWAN test bed in real time.

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FEM-Optimized Piezoelectric AlN-based sensor for Blood Viscosity Monitoring in Polysomnographic applications

FEM-Optimized Piezoelectric AlN-based Sensor for Blood Visco...

引用

IEEE Canada international Humanitarian Technology conference (IHTC)

作者： Ilaria Marasco Beatrice Irmici Francesco Rizzi Luca Fachechi Paolo Visconti Massimo De Vittorio Vincenzo Mariano Mastronardi Department of Electrical and Information Engineering Polytechnic University of Bari Bari Italy Center for Biomolecular Nanotechnologies Istituto Italiano di Tecnologia Italy Department of Innovation Engineering University of Salento Lecce Italy

ISBN: (数字)9798350354645

ISBN: (纸本)9798350354652

In this work, we present the design, simulation, and validation of a flexible piezoelectric AlN-based sensor for the measurements of fluid viscosity within a vascular prosthesis. In particular, the goal is to derive and monitor the percentage of blood oxygenation from viscosity measurements to monitor this value for polysomnographic applications. The simulations of the optimized design have been performed with COMSOL Multiphysics®, proving the proposed technology is a promising application for wearable blood oxygenation monitoring.

关键词： Viscosity Geometry Atmospheric measurements Particle measurements Software Software measurement Biomedical monitoring Monitoring Blood Prosthetics

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Research progress on wireless sensor network (WSN) security technology 6

Research progress on wireless sensor network (WSN) security ...

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6th international conference on Mechanical, Aeronautical and Automotive Engineering, ICMAA 2022

作者： Qichen, Wang Nanjing University of Science and Technology Xiao Lingwei Street Jiangsu Province China

Wireless sensor network (WSN) has been a frontier technology field that integrates a variety of technologies and has a wide range of applications in the military. Network security is of great significance in military warfare. First, this paper outlines the technical advantages of the application of military based on the technical characteristics of WSN. In military applications, WSN has been used in modern military combat while WSN features easy and fast deployment, high concealment, good fault tolerance, high accuracy and other obvious advantages. Moreover, from the perspective of network security, this paper reviews the research progress of network security technology at the network level and data level. The network level includes security protocols, key management, and secure routing technology, and key management includes pre-shared key mode and random key pre-distribution mode. At the data level, error control and fault-tolerant algorithms are mainly included. Automatic retransmission and forward error correction techniques are traditional error control methods, which should be combined with the specific situation of WSN to propose the corresponding fault-tolerant mechanism. Finally, this paper summarizes the practical applications of WSN in the military. From battlefield reconnaissance and target localization monitoring to destruction effect control and anti-terrorism equipment research, network security has been a top priority. Against the background of practical military applications, this paper summarizes the research significance of network security technology. © Published under licence by IOP Publishing Ltd.

关键词： Wireless sensor networks

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Recognition System Of Human Activities Based On Time-Frequency Features Of Accelerometer Data 5

Recognition System Of Human Activities Based On Time-Frequen...

引用

5th international conference on Intelligent Systems and Computer Vision, ISCV 2022

作者： Xia, Yiwei Ma, Jun Yu, ChuYue Ren, XunHuan Antonovich, Boriskevich Anatoliy Tsviatkou, Viktar Yurevich Belarusian State University of Informatics and Radioelectronics Department of infocommunication technologies Minsk Belarus

ISBN: (纸本)9781665495585

With the development of Micro-Electro-Mechanical System, wearable sensor-based human activity recognition systems have important applications in various fields such as health management, motion analysis, military and industry. In this paper, we propose a time-frequency features extraction method based on wavelet transform, which extracts 5 time-frequency features, namely wavelet entropy, wavelet energy, wavelet waveform length, wavelet coefficient variance and wavelet coefficient standard deviation. The experimental results are evaluated on the publicly available benchmark WISDM dataset including accelerometer data. Our model achieves 99.2%, 99.1% and 95.6% test accuracy on Subspace KNN, Bagged tree and Gaussian SVM respectively. © 2022 IEEE.

关键词： Accelerometers

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DD-MLFMA-slotFFT Framework for the Electromagnetic Solution of Mounted Finite Periodic Structures

DD-MLFMA-slotFFT Framework for the Electromagnetic Solution ...

引用

international conference on Electromagnetics in Advanced applications (ICEAA)

作者： Victor F. Martin Alberto Serna Luis Landesa Fernando Obelleiro Marta G. Araujo Francesca Vipiana Jose M. Taboada University of Extremadura Caceres Spain University of Vigo Vigo Spain Politecnico di Torino Turin Italy

ISBN: (数字)9798350360974

ISBN: (纸本)9798350360981

The interest in the electromagnetic behavior of periodic structures has significantly increased due to their crucial role in advancing cutting-edge applications in nanoscale and metasurface devices in scattering networks, plasmonic crystals, and nanophotonics. The rise of these technologies makes the improvement of the state-of-the-art methods in computational electromagnetics for the efficient solution of these kind of periodic structures even more crucial than ever. Traditional approaches predominantly centered on methods tailored for infinite periodic structures based on Floquet’s theorem and the Ewald transformation. However, although these methods have been demonstrated as powerful tools in the design process, they are not suitable for integration with other systems and sensors due to the limitation of infinite periodic structures or the accurate modeling of complex physical phenomena like edge effects and standing waves, vital phenomena for certain applications.

关键词： Nanophotonics Electromagnetic scattering Crystals sensor phenomena and characterization sensor systems and applications Plasmons Metasurfaces Nanoscale devices Electromagnetics Periodic structures

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A ±25A Versatile Shunt-Based Current sensor with 10kHz Bandwidth and ±0.25% Gain Error from -40°C to 85°C Using 2-Current Calibration

A ±25A Versatile Shunt-Based Current Sensor with 10kHz Band...

引用

2022 IEEE international Solid-State Circuits conference, ISSCC 2022

作者： Tang, Zhong Zarnparette, Roger Furuta, Yoshikazu Nezuka, Tomohiro Makinwa, Kofi A. A. Delft University of Technology Delft Netherlands Mirise Technologies Aichi Japan

ISBN: (纸本)9781665428002

Accurate current sensing is critical in many industrial applications, such as battery management and motor control. Precise shunt-based current sensors have been reported with gain errors of less than 1% over the industrial temperature range (-40°C to 85°C) [1]-[4]. However, since they are intended for coulomb counting, their bandwidth is limited to a few tens of Hz, making them unsuitable for battery impedance or motor-current sensing. This paper presents a current sensor with a wide (10kHz) bandwidth and a tunable temperature compensation scheme (TCS), which allows it to be flexibly used with different types of shunts while maintaining high accuracy. A low-cost room-temperature calibration scheme is proposed to optimize gain flatness over temperature by exploiting the shunt's self-heating at large currents. Over the industrial temperature range and a ±25A current range, it achieves state-of-the-art gain error (±0.25%) with both low-cost PCB and stable metal-alloy shunts. © 2022 IEEE.

关键词： Bandwidth

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An Exploration of LoRa Network in Tropical Farming Environment 2

An Exploration of LoRa Network in Tropical Farming Environme...

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IEEE 2nd international conference on Computer Communication and Artificial Intelligence (CCAI)

作者： Gonzalez, Carlos Gibeaux, Soizic Ponte, Daniel Espinosa, Asael Pitti, Javier Nolot, Florent Univ Autonoma Chiriqui Vicerrectoria Invest & Posgrad David Panama Inst Innovac Agr Panama IDIAP Cerro Punta Panama Univ Reims Lab CReSTIC Reims France

ISBN: (纸本)9781665496636

Agricultural Internet of Things (IoT) applications represent a great help in collect environmental data and guide the farmer to make better decisions. Due to the data range of wireless networks and low power capabilities, one promising technologies for Low-Power-Wide-Area-Network (LPWAN) is LoRa systems. This study provides the performance evaluation of outdoor Lora signal propagation within the range 902-928 megahertz frequency in tropical environment. The behavior of LoRa communication in a tropical vegetation appeared smaller than the theoretical expected range. A dense vegetation intensely reduces the communication range impacting the spreading factor and coding rate. The sensor nodes are positioned from several hundred meters of a point collection in a rural environment. Different propagation models and checkpoint have been compared to the measurement metrics of the LoRa performance evaluation including the Signal to Noise Ratio (SNR), the Received Packet Ratio (RPR), Received Signal Strength Indication (RSSI).

关键词： IoT LoRa LoRaWAN received signal strength RSSI Wireless sensor networks

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Smart Parking Management System

Smart Parking Management System

引用

Computational Intelligence and Communication technologies (CCICT), international conference on

作者： Benoit David Petit Kreshen Pillay Amourdon Raj Kishen Moloo Digital Technologies Dept University of Mauritius Reduit Mauritius

ISBN: (数字)9798350374629

ISBN: (纸本)9798350374636

This paper brings forward an automated and real-time smart parking management system using low-cost IoT infrastructure that collects parking status with sensors dispatched to different parking spaces. They transmit the parking status to the AWS IoT platform, automated using solar panel energy. The AWS IoT Core handles all incoming messages from the IoT system to integrate the information collected into the AWS DynamoDB database using the AWS lambda function. Administrators can manage the parking spaces, by performing some CRUD operations on a mobile application, developed using Ionic Framework. The administrators can have real-time visibility on the number of free and occupied parking spaces, with detailed information about parking status and parking occupants. A navigation GPS tracker system and a parking search engine are also provided on the applications to easily obtain parking spaces around Mauritius.

关键词： Navigation Automated parking Search engines Real-time systems sensor systems Mobile applications Solar panels

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Electrode Polarization-Based sensor for Real-Time Monitoring of Salt and Sugar Concentrations in Beverages 3

Electrode Polarization-Based Sensor for Real-Time Monitoring...

引用

3rd IEEE international conference on Device Intelligence, Computing and Communication technologies, DICCT 2025

作者： Lata, Anamika Maurya, Praveen Singh, M.K. School of Electronics Engineering Vit Ap University India

ISBN: (纸本)9798331543358

An electrode polarization impedance-based sensor was developed due to the increasing demand for accurate and non-invasive methods to monitor the level of sugar and salt in drinks. This sensor is based on the description of a reliable process of using a four-electrode system for measuring the levels of sugar and salt in various drinks. There are two pairs of electrodes in the system: the inner pair senses voltage, and the outer pair delivers a regulated AC signal. Ionic (salt) and non-ionic (sugar) molecules in the solution both affect the electrode polarization impedance (ZP), and changes in voltage mirror these effects. As per experimental data, there exists a clear inverse relationship between the output voltage and sugar and salt content, which makes this method suitable for real-time monitoring of beverage composition. Sensitivity analysis of the sensor offers similar results for various beverages with increased sensitivity observed at increasing salt concentrations. The proposed method is a good tool for industry and research applications, as it presents a non-invasive, reliable, and cheap alternative to food safety management, health monitoring, and the soft drink industry. © 2025 IEEE.

关键词： Tea

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UWSN: A Novel Artificial Intelligence (AI) enabled Scheme to Improve Security and Energy Efficiency over Underwater Wireless sensor Networks

UWSN: A Novel Artificial Intelligence (AI) enabled Scheme to...

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Advances in Electrical, Computing, Communication and Sustainable technologies (ICAECT), international conference on

作者： P. Shyamala Bharathi M Jaya Bharatha Reddy Department of Electronics and Communication Engineering Saveetha School of Engineering Saveetha Institute of Medical and Technical Sciences Saveetha University Chennai

ISBN: (数字)9798350356236

ISBN: (纸本)9798350356243

Underwater Wireless sensor Networks (UWSNs) are critical for monitoring and managing marine environments, supporting applications in environmental science, defense, and resource exploration. This study presents an innovative AIenabled scheme for improving security and energy efficiency in Underwater Wireless sensor Networks (UWSNs). By incorporating artificial intelligence, the proposed AI-UWSN protocol dynamically adapts to environmental and network conditions, enhancing key performance metrics like energy consumption, packet delivery ratio (PDR), latency, and network lifetime. The AI-UWSN achieved an average energy consumption of 146J, which is 24% lower than conventional protocols, extending the network lifetime to 1067 hours, compared to 722 hours in existing methods. Additionally, the protocol's intelligent routing increased PDR to 89%, significantly reducing data loss, and maintained an average latency of 108ms, 15% lower than alternative protocols. These improvements result from AI-based routing and clustering strategies, which optimize data aggregation and power usage, extending the network's functionality even in high-density, high-traffic environments.

关键词： Wireless sensor networks Energy consumption Protocols Environmental science Data aggregation Routing Energy efficiency Security Artificial intelligence Monitoring

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