• Proceedings of the Korean Institute of Building Construction Conference
• /
• 2019.05a
• /
• pp.258-259
• /
• 2019

Corrosion of rebar in RC structures, which results in premature deterioration of reinforced concrete structures, is a very serious problem. Most corrosion monitoring and sensing technologies require some type of wired or wireless connection between the sensor and monitoring electronics. This causes significant problems in their installation and long-term use. In this paper we describe a corrosion monitoring technology of rebar in reinforced concrete structures. Especially, it is emphasize that the development of sensors and monitoring system not only occurrence of rebar corrosion but also penetration of deterioration factor such like chloride ion and carbon dioxite etc..

• Proceedings of the KSR Conference
• /
• 2007.11a
• /
• pp.1196-1202
• /
• 2007

In construction of high speed railway, the fan shape is limited to achieve reduction of required travel time and concrete railway which has structural stability and induces small maintenance cost with allowable ground settlement is recently applied. So construction of concrete railway on soft ground in which considerable ground settlement occurs increases and settlement management in soft ground section is required. Field monitoring on ground movement and integrated geotechnical information system which manages construction, design, and field monitoring data are essential for settlement management of concrete railway subgrade. Site investigation data are also required due to future repair work. Therefore in this study, integrated geotechnical information system for construction and maintenance of concrete railway is developed. The developed system consists of a database and an application program. The database contains site investigation, construction, design, and field monitoring data throughout a railway. Application program performs various functions on managing and utilizing information in the database with graphic visualization of output. And by providing integrating information with comprehensible visual displays, the applicability and effectiveness of the developed system for construction and maintenance management were confirmed.

• Proceedings of the Korean Institute Of Construction Engineering and Management
• /
• 2007.11a
• /
• pp.853-858
• /
• 2007

Construction industry is traditionally labor intensive. And construction site is also in densely populated environment. So accurate labor monitoring is one of important issues for site management. Labor cost shares large amount of part in total construction cost. Therefore, it is a major element in site management and control. In this article, we explained development of prototype system for labor monitoring based on RFID technology and results of field tests using the system. According to the results, the system is able to expected to improve effectiveness of Labor management in construction site

• Proceedings of the Korean Geotechical Society Conference
• /
• 2009.03a
• /
• pp.1139-1146
• /
• 2009

Collapse of cut slope includes many uncertainties in view of the reason and time. So, in the past, risky cut slopes have been dealt after they've been collapsed through post-management measures. But recently, advanced disaster prevention system is required, and as a part of that RTMS(Real-Time Monitoring System) was developed. In this study, stability of risky cut slope was evaluated by site investigation. To grasp deformation behavior characteristics of slope, numerical analysis based on FEM was performed and using results of that, specific standards for installation of Real-Time Monitoring System were suggested.

• Journal of Korea Multimedia Society
• /
• v.14 no.11
• /
• pp.1450-1457
• /
• 2011

Currently most of leak detection monitoring systems use digital maps with paying royalties, and this increases the cost of system construction and financial burdens on local self-governing bodies that manage such systems. Moreover, they have inefficiencies in repair and maintenance, functional expansion, and compatibility with other systems. Thus, this study developed a waterworks pipe network monitoring system that pursues low cost and high efficiency using general-purpose maps on the Internet such as google maps. As this system uses highly compatible free maps, it costs less in construction and its hardware requirements are lower than existing systems, and consequently, overall monitoring performance is enhanced and the cost of construction goes down sharply. This study also proposed a method for pipeline DB construction, which can be started together with the construction of the monitoring system, in order to improve the field applicability of the system.

• Journal of Wellbeing Management and Applied Psychology
• /
• v.7 no.4
• /
• pp.1-13
• /
• 2024

Purpose: The purpose of this study is to develop a highly accurate mobile air quality monitoring system suitable for use in various event-specific locations, such as fireworks festivals or construction sites. Research design, data and methodology: The study focuses on optimizing the selection and design of equipment for a mobile air quality monitoring system, aiming to reduce production costs and improve measurement accuracy. It includes a comparative analysis with existing Air Quality Monitoring Stations (AQMS) and enhances calibration methods to stabilize performance under various environmental conditions. This approach ensures a cost-effective, accurate, and efficient mobile air quality monitoring system. Results: By utilizing measurement data collected from various regions, further improvements can be made in the future to develop a more efficient and accurate mobile air quality monitoring system. The accuracy of the existing mobile air quality monitoring system has been enhanced through this study, making it applicable for measurements in various fields. Conclusions: With the growing concern about air pollution, a mobile air quality monitoring system could be effectively utilized in areas where event-based air pollution occurs, such as firework festivals or construction sites. In the future, by utilizing data from various regions, further improvements and enhancements can be made to the system, leading to a more efficient and accurate mobile air quality monitoring system.

• Smart Structures and Systems
• /
• v.21 no.2
• /
• pp.139-149
• /
• 2018

Understanding the current status of a construction project is necessary to achieve successful on-site management. Real-time information delivery is a major concern for construction industry practitioners in order to expedite decisions and discussions. We propose the use of a first personal view (FPV) system of a quadcopter drone as a tool for monitoring on-site status and communicating between construction participants. The most important function of the drone FPV system is its ability to visually monitor construction site situations in real time. An on-site management system process is developed, verified, and applied to several construction work tasks after determining factors that affect efficient construction management. The proposed system is expected to assist the construction manager in achieving high efficiency.

• International conference on construction engineering and project management
• /
• 2005.10a
• /
• pp.491-496
• /
• 2005

In this paper, the authors explained the overview of a method for detecting location of worker for development of a monitoring system for project progress management using RFID technology. Data is the RSSI (Receive Signal Strength Indication) from RFID tag attached to the worker installing a rolling shutter, and was obtained from antennas and RFID readers set around the construction site. Neural network was done using RSSI collected and the area where worker is performing a task, and an estimation model of the working area was prepared. The network had a range of the percentage of correctly classified from 62% to 92%. The authors suggested the method to make estimate by using integrated networks prepared in respect of RFID readers, and showed the percentage of correctly classified of 84.3%. According to the result, the authors confirmed the possibility of the monitoring system with RFID technology, and mentioned the factors necessary to develop for further practical use.

• Journal of Korean Tunnelling and Underground Space Association
• /
• v.20 no.1
• /
• pp.73-81
• /
• 2018

The purpose of this study is to research the regulation of durability standard of underground structures monitoring sensors. The durability criteria for construction monitoring sensors of domestic construction companies, the standard years of contents such as buildings on the income tax implementation regulations, and the standards of the Public Procurement Service for construction monitoring and construction machinery were analyzed. The durability criterion on products such as the inclination meter and the strain gauge, which are purchased from the Public Procurement Service prior to installation on the underground structure, is 8 to 10 years. It is considered that the monitoring sensor installed in the paperboard and the concrete structure at the time of construction will have considerably shortened service life rather than the useful life of the product itself due to various adverse factors such as groundwater influence and compaction.

• International conference on construction engineering and project management
• /
• 2005.10a
• /
• pp.1017-1021
• /
• 2005

There is a need for effective tracking and control of material loading and delivery time especially during the finishing-work phases to eliminate the need for lay-down space on the site. Hence, it is essential to monitor the relevant information regarding material procurement in construction sites, and it is also the key factor for successful site control and the adoption of the Just-in-Time concept for high-rise building construction. The purpose of this study is to test RFID's readability in order to develop a finishing material monitoring system through the application of RFID technology.