A5044768035- Advanced Sensor and Energy Harvesting Materials
- Engineering Applied Research
- Advanced Memory and Neural Computing
- Structural Health Monitoring Techniques
- Magnetic Properties and Applications
- Thermoregulation and physiological responses
- Concrete Corrosion and Durability
- Mesoporous Materials and Catalysis
- Analytical Chemistry and Sensors
- Microstructure and Mechanical Properties of Steels
- Air Quality Monitoring and Forecasting
- Muscle activation and electromyography studies
- CCD and CMOS Imaging Sensors
- Metallurgy and Material Forming
- Ultrasonics and Acoustic Wave Propagation
- IoT-based Smart Home Systems
- Conducting polymers and applications
- Electrocatalysts for Energy Conversion
- Covalent Organic Framework Applications
- Infrared Thermography in Medicine
- Neuroscience and Neural Engineering
- Advanced Chemical Sensor Technologies
- Non-Destructive Testing Techniques
- Thermal Regulation in Medicine
- Smart Materials for Construction
Sungkyunkwan University
2019-2024
Hannam University
2004-2015
Epidermal and wearable electronic sensor technologies have gained extensive interest in recent years owing to deliver real-time healthcare information the personalized smartphone. Herein, we proposed a fully integrated smart patch-based system with Kirigami-inspired strain-free deformable structures having temperature humidity sensors along commercial acceleration sensor. The presented easily attaches skin accurately determine body information, circuit including read-out wireless...
Abstract Conformal and ultrathin coating of highly conductive PEDOT:PSS on hydrophobic uneven surfaces is essential for resistive-based pressure sensor applications. For this purpose, a water-based poly(3,4-ethylenedioxythiophene) polystyrene sulfonate (PEDOT:PSS) solution was successfully exchanged to an organic solvent-based without any aggregation or reduction in conductivity using the ultrafiltration method. Among various solvents, ethanol (EtOH) solvent-exchanged exhibited contact angle...
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Abstract Heating, ventilation, and air conditioning systems in building operations have extensively gained significant interest recent years for providing a comfortable environment energy savings by utilizing the occupancy information of buildings. Herein, flexible heterogeneous temperature humidity sensor‐based detection device with an integrated wireless communication system is introduced. The multichannel (three‐channel) Pt‐based single‐channel sensors afford excellent electrical...
There is a need for continuous, non-invasive monitoring of biological data to assess health and wellbeing. Currently, many types smart patches have been developed continuously monitor body temperature, but few trials completed evaluate psychometrics feasibility human subjects in real-life scenarios. The aim this study was the reliability, validity usability patch measuring temperature healthy adults. consisted fully integrated wearable wireless sensor with multichannel sensor, signal...
Hybrid electronics require a robust mechanical interface between externally fabricated stretchable sensors and flexible printed circuit boards (FPCBs) to obtain stable electrophysiological information. The most advanced technique for the integration of FPCBs with is anisotropic conductive film bonding. Fabricating high-performance requires microfabrication techniques, such as photolithography etching, which are cumbersome expensive. Therefore, sensor fabrication process that supports FPCB...
Wearable epidermal sensor systems have gained tremendous attraction for real-time healthcare monitoring devices with different geometry and device architectures. In this work, a stretchable-gradient interconnection is introduced to nature-inspired kirigami–serpentine-based temperature an integration of flexible printed circuit board obtain body high accuracy sustainability under complex mechanical conditions. The electrical measurements multiple testing processes are performed, the results...
Real-time durability monitoring systems in large building structures are an essential technology for smart cities. In this study, a structural-durability health-monitoring (SDHM) system is designed and demonstrated. The SDHM consists of embedded multisensing sensors, data processing modules, subwavelength wideband antenna operating at 900 MHz. sensors reversibly examine the degradation factors inside concrete, possibly offering real-time depth profiles. A ensures stable transmission...
Tension measurement of tendon employed in PreStressed Concrete (PSC) bridge is very important for the safety check. For tensile stress tendon, many different methods such as acoustics, fiber optics, and electro-magnetics are employed. In this work, to measure by mean magnetic method, we have constructed a measuring system. Ac or dc current was applied 7-strand directly magnetize circular direction. Tensile means hydraulic piston which can apply force up 0.3 MN, 0.5 MN load cell force.
본 연구는 현재 교량에 사용되고 있는 텐던의 하중 특성을 비파괴적이면서 비접촉방법으로 측정하기 위한 것으로, 인장력에 따른 자화상태의 변화를 보기 위하여 2 GPa까지 인장력을 인가할 수 장치와 텐던에 dc 전류와 ac 전류를 인가하여 텐던을 원주 방향으로 자화시키기 전류공급장치, 요크(yoke)를 사용하여 비접촉으로 축 요크 장치를 제작하였다. 시편은 비교실험을 두 제조회사에서 제작된 사용하였으며 측정 장치로 가지 조건의 실험을 수행하였다. 첫 번째 실험은 인가하면서, 요크에 유도기전력을 부착된 탐지코일(SCY)로 측정하였고, 이를 통해 200 MPa 이하의 인장력에서는 민감하게 변화하는 것을 볼 있었지만 실질적으로 측정하여야 하는 1.5 GPa 근처에서는 그 변화량이 매우 적었다. 인가한 후, 탐지코일(SCT)로 결과 유도기전력이 선형적으로 감소하였으며 활용하여 비접촉 방법으로 가능할 것으로 생각된다. In this study, we have constructed a...
본 연구에서는 현재 교량에 사용되고 있는 텐던의 인장력을 측정하기 위한 자기적 비파괴 검사 방법을 연구하였다. 최근 방법으로 초기투자율(<TEX>${\mu}i$</TEX>)과 증분투자율(<TEX>${\mu}{\Delta}$</TEX>) 측정 방법은 코일을 권선하여 텐던을 자화 시켜야 하고, 자기소거상태에서 측정하여야 하는 어려움이 있다. 때문에 텐던이 7개의 strand로 꼬여 것을 감안하여, Wiedemann effect를 활용한 텐던에 직접 교류 전류를 인가한 후, 변화시키면서 그에 따른 상태의 변화를 부착된 탐지코일(Search Coil on Tendon; SCT)로부터 측정하고 분석하였다. 이를 위하여 2 GPa까지 인가할 수 장치와 인가하여 자화시키기 전류공급장치를 제작하였다. 비교실험을 두 제조회사에서 제작된 동일한 규격의 7-strands 대한 인장력에 측정한 결과, 인가하는 따라 탐지코일에서 유도되는 기전력의 변화가 비교적 선형적으로 감소함을 알 있었으며, 이는...