• 드라이브 ㆍ 컨트롤
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• 제19권1호
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• pp.1-7
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• 2022

Recently, a re-painting robot was developed to semi-automatically conduct blasting work in bridge spaces to improve work productivity and worker safety. In this study, a vision sensor-based monitoring module was developed to automatically move the re-painting robot along the path. The monitoring module provides direction information to the robot by analyzing the boundary between the painting surface and the metal surface. To stably measure images in unstable environments, various techniques for improving image visibility were applied in this study. Then, the driving performance was verified in a similar environment.

• 사물인터넷융복합논문지
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• 제10권2호
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• pp.61-67
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• 2024

신품종 농작물 생육 환경 모니터링을 위해 보급형 스마트센서 태그 기술을 활용한 농업 생산 인프라 구축 및 농업 자원 관리 체계 강화가 필요하다. 또한, IoT 기술을 활용한 고품질의 신품종 농작물 개량 인프라 구축 및 모니터링 체계를 강화해야 하며, 신품종 작물 개량에 필요한 환경 모니터링을 위한 보급형 스마트 센서 (RFID UHF Sensor Tag) 기술이 스마트팜 환경에서 절실히 필요한 상황이다. 따라서, 본 논문에서는 이기종 통합 센서 기반의 스마트 태그 기능을 구현할 수 있는 통합 센서를 구현하였다. 또한, 구현된 스마트 통합 태그와 스마트폰 연동을 통해 농작물을 실시간으로 관리할 수 있는 기술을 개발하였다. 이를 위해, RFID와 블루투스 통신이 가능한 통합형 안테나를 구성하였고, 블루투스 기능을 통하여 스마트폰에서 직접 정보를 수집할 수 있는 통신 방법을 병행하였다.

• Journal of Information Processing Systems
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• 제19권2호
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• pp.240-257
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• 2023

The industrial Internet of Things (IIoT) is characterized by intelligent connection, real-time data processing, collaborative monitoring, and automatic information processing. The heterogeneous IIoT devices require a high data rate, high reliability, high coverage, and low delay, thus posing a significant challenge to information security. High-performance edge and cloud servers are a good backup solution for IIoT devices with limited capabilities. However, privacy leakage and network attack cases may occur in heterogeneous IIoT environments. Cloud-based multi-party computing is a reliable privacy-protecting technology that encourages multiparty participation in joint computing without privacy disclosure. However, the default cloud selection method does not meet the heterogeneous IIoT requirements. The server can be dishonest, significantly increasing the probability of multi-party computation failure or inefficiency. This paper proposes a blockchain and smart contract-based optimized cloud node selection framework. Different participants choose the best server that meets their performance demands, considering the communication delay. Smart contracts provide a progressive request mechanism to increase participation. The simulation results show that our framework improves overall multi-party computing efficiency by up to 44.73%.

• KSII Transactions on Internet and Information Systems (TIIS)
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• 제16권1호
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• pp.173-187
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• 2022

Recent studies have focused on self-management of hypertension using smart devices (cellular phones, tablets, watches). It has proven to be an effective tool for early detection and control of high Blood Pressure (BP) without affecting patients' daily routines. This systematic review surveys the existing self-monitoring systems, evaluate their effectiveness and compares the different approaches. We investigated the current systems in terms of various attributes, including methods used, sample size, type of investigation, inputs/ outputs, rate of success in controlling BP, group of users with higher response rate and beneficiaries, acceptability, and adherence to the system. We identified some limitations, shortcomings, and gaps in the research conducted recently studying the impact of mobile technology on managing hypertension. These shortcomings can generate future research opportunities and enable it to become more realistic and adaptive. We recommended including more observable factors and human behaviors that affect BP. Furthermore, we suggested that vital monitoring/logging and medication tuning are insufficient to improve hypertension control. There is also a need to observe and alter patient behavior and lifestyles.

• Smart Structures and Systems
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• 제3권3호
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• pp.299-320
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• 2007

Smart sensors densely distributed over structures can provide rich information for structural monitoring using their onboard wireless communication and computational capabilities. However, issues such as time synchronization error, data loss, and dealing with large amounts of harvested data have limited the implementation of full-fledged systems. Limited network resources (e.g. battery power, storage space, bandwidth, etc.) make these issues quite challenging. This paper first investigates the effects of time synchronization error and data loss, aiming to clarify requirements on synchronization accuracy and communication reliability in SHM applications. Coordinated computing is then examined as a way to manage large amounts of data.

• 한국정보통신학회:학술대회논문집
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• 한국정보통신학회 2016년도 추계학술대회
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• pp.496-499
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• 2016

스마트팜은 현재 농업 환경 모니터링 분야에서 각광받고 있다. 무선 원격 시스템의 사용으로 스마트팜의 응용 프로그램들은 농민이 어디에 있던지 생장 정보를 제공할 수 있다. 부재중에서도 모바일 폰을 사용하여 도표화된 정보를 얻을 수 있다. 우리는 클라우드 플랫폼 기술을 기반으로 스마트팜을 관리, 운영하는데 있어 필요한 시스템 및 서비스의 기술적 요구사항과 구성 내용을 설계한다. 클라우드 플랫폼은 스마트팜을 모니터링, 제어, 관리 및 운영하기 위한 클라우드 기술의 요구사항을 기술하고 있으며, 특히, 클라우드 플랫폼 기반 스마트팜 시스템 및 서비스는 3가지 인터페이스와 3가지 서비스로 구성되어 있다. 또한, 클라우드 플랫폼을 활용한 스마트팜은 재배작목, 농장의 규모, 시설형태 등에 따라 다양한 방식으로 구축, 운영 될 수 있으며, 이에 따라 다양한 유형이 존재한다. 이를 통하여 오픈 (개방/표준) 클라우드 플랫폼의 중요성에 대해 산업계의 관심을 고조시키고 농업에서의 스마트팜의 활성화에 기여할 수 있다.

• Journal of Platform Technology
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• 제6권3호
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• pp.17-22
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• 2018

스마트 홈이란 집 안의 냉난방에서부터 조명, 주방, 보안에 이르기까지 가정에 있는 다양한 장치들을 네트워크에 연결해서 집안의 모든 정보를 모니터링 및 제어할 수 있는 기술을 의미한다. 스마트 홈 기술의 발전으로 집안 기기의 사용은 편리 해졌지만 반면 정보보안 측면의 해저드가 공존한다. 권한이 없는 방문자가 집안의 기기에 임의로 접근해서 정보 조회나 기기를 제어하는 프라이버시 및 보안 문제는 스마트 홈에 있어 해결해야 할 중요한 문제이다. 본 논문에서는 스마트 홈에서 프라이버시 보호를 위한 사용자 동적 접근 제어 기법을 제안하고자 한다. 제안된 시스템은 스마트 홈서비스 사용자의 상황정보를 자동 판별하여 사용자의 역할을 정의하고 서비스 접근 범위를 동적으로 제어함으로써 사용자의 프라이버시를 보호하고 스마트 디바이스 간의 효과적인 서비스를 제공한다. 제안된 스마트 홈에서의 동적 접근 제어 방법은 스마트 홈 기기에 대한 개인정보 보호를 위한 향상된 보안서비스를 제공할 것으로 기대된다.

• Smart Structures and Systems
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• 제12권3_4호
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• pp.271-290
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• 2013

The acceleration information is significant for the structural health monitoring, which is the basic measurement to identify structural dynamic characteristics and structural vibration. The efficiency of the accelerometer is subsequently important for the structural health monitoring. In this paper, the distance measure matrix and the support level matrix are constructed firstly and the synthesized support level and the fusion method are given subsequently. Furthermore, the synthesized support level can be served as the determination for diagnosis on accelerometers, while the consensus data fusion method can be used to recover the acceleration information in frequency domain. The acceleration acquisition measurements from the accelerometers located on the real structure National Aquatics Center are used to be the basic simulation data here. By calculating two groups of accelerometers, the validation and stability of diagnosis and recovering on acceleration based on the data fusion are proofed in the paper.

• Journal of information and communication convergence engineering
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• 제21권3호
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• pp.216-224
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• 2023

Smart lighting systems have become increasingly popular in several public sectors because of trends toward urbanization and intelligent technologies. In this study, we designed and implemented a web application platform to explore and monitor data acquired from lighting devices at Thammasat University (Rangsit Campus, Thailand). The platform provides a convenient interface for administrative and operative staff to monitor, control, and collect data from sensors installed on campus in real time for creating geographically specific big data. Platform development focuses on both back- and front-end applications to allow a seamless process for recording and displaying data from interconnected devices. Responsible persons can interact with devices and acquire data effortlessly, minimizing workforce and human error. The collected data were analyzed using an exploratory data analysis process. Missing data behavior caused by system outages was also investigated.

• Tribology and Lubricants
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• 제24권3호
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• pp.111-121
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• 2008

An integrated in-line oil monitoring detector assigned for continuous in situ monitoring multiple parameters of oil performance for predicting economically optimal oil change intervals and equipment condition control is presented in this study. The detector estimates oil deterioration based on the information about chemical degradation, total contamination, water content of oil and oil temperature. The oil oxidation is estimated by "chromatic ratio", total contamination is measured by the changes in optical intensity of oil in three optical wavebands ("Red", "Green" and "Blue") and water content is evaluated as Relative Saturation of oil by water. The detector is able to monitor oils with low light absorption (hydraulic, transformer, turbine, compressor and etc. oils) as well as oils with rather high light absorption in visible waveband (diesel and etc. oils). In a case study that the detector is applied to a diesel engine oil, it is found that the detector provides good results on oil chemical degradation as well as soot concentration.