• Smart Media Journal
• /
• v.11 no.9
• /
• pp.30-38
• /
• 2022

It is important to grasp biometric data in real time for prompt action in the event of a safety accident at a work site where the risk of safety accidents exists. Among them, blood oxygen saturation is the most important factor in maintaining human life, so real-time oxygen saturation measurement and monitoring is necessary according to the situation as a preemptive response for worker safety management. By receiving real-time bio-signals from workers wearing health and life-risk protective clothing, and sharing and analyzing the worker's risk status in an external system, it is possible to diagnose the worker's current condition and efficiently respond to emergencies that may occur to the worker. In this paper, we propose a wearable oxygen saturation measurement platform technology that can monitor the risk of harmful gases and oxygen saturation of the wearer in real time and ensure the wearer's activity and safety in order to cope with emergency situations at the scene of an accident. If we overcome the limitations identified through the results of the proposed system later and apply improved biodata such as motion correction to the platform, we expect that it will be usable not only in hazardous gas environments, but also in hospitals and homes for emergency patients.

• Journal of Practical Engineering Education
• /
• v.14 no.3
• /
• pp.543-553
• /
• 2022

A collaborative robot(Cobot) is one of the production systems presented in the 4th industrial revolution and are systems that can maximize efficiency by combining the exquisite hand skills of workers and the ability of simple repetitive tasks of robots. Also, research on the development of an efficient interface method between the worker and the robot is continuously progressing along with the solution to the safety problem arising from the sharing of the workspace. In this study, a method for controlling the robot by recognizing the worker's hand signal was presented to enhance the convenience and concentration of the worker, and the safety of the worker was secured by introducing the concept of a safety zone. Various technologies such as robot control, PLC, image processing, machine learning, and ROS were used to implement this. In addition, the roles and interface methods of the proposed technologies were defined and presented for using educational media. Students can build and adjust the educational media system by linking the introduced various technologies. Therefore, there is an excellent advantage in recognizing the necessity of the technology required in the field and inducing in-depth learning about it. In addition, presenting a problem and then seeking a way to solve it on their own can lead to self-directed learning. Through this, students can learn key technologies of the 4th industrial revolution and improve their ability to solve various problems.

• Proceedings of the Korean Nuclear Society Conference
• /
• 2001.05a
• /
• pp.413-413
• /
• 2001

• Proceedings of the Safety Management and Science Conference
• /
• 2008.04a
• /
• pp.35-46
• /
• 2008

• Journal of the Korean Society of Safety
• /
• v.36 no.5
• /
• pp.71-78
• /
• 2021

There are regularly planned overhaul periods in thermal power plants, which involve the maintenance of the boiler of the power plants. However, thermal power plants workers are always exposed to risk during overhaul periods owing to the narrow space and significant dust inside the boiler. Therefore, it is essential to develop a safety monitoring system that is suitable for operating in this type of environment. In this study, we developed not only a worker three-dimensional (3D)-location monitoring system that can monitor and record the entry/exit of workers, their 3D-location, and fall accidents but also a method to secure the working environment and operation efficiency. This system comprises of a worker tag, which was equipped with an inertial measurement unit, a barometric pressure sensor, and a Bluetooth low energy (BLE), and the tags were given to each worker. In addition, the location of workers inside the boiler was measured using a pedestrian dead reckoning (PDR) method and BLE beacons. The location data of the workers tag were transmitted to the integrated database (DB) server through a gateway, and to the administrator monitoring system. The performance of the system was demonstrated inside an actual thermal power plant boiler, and the accuracy and reliability of the system were verified through a number of repeated tests. These results provide insights on designing a new system for monitoring enclosed spaces.

• The Journal of the Convergence on Culture Technology
• /
• v.10 no.1
• /
• pp.533-538
• /
• 2024

The risk assessment under the Occupational Safety and Health Act was implemented in 2013, but since it is not mandatory, companies are operating it as a formality. Although legal obligations have been strengthened, such as the recent comprehensive revision of the Occupational Safety and Health Act and the enforcement of the Act on Punishment for Serious Accidents, the death rate has remained stagnant. Even if a risk assessment plan is properly established in order for employers to prevent industrial accidents through necessary measures, it is necessary to involve relevant workers so that they can understand and implement the contents of the risk assessment. In this regard, this study proposed applying efficient worker participation measures through on-site surveys to activate the participation of vulnerable workers in risk assessments. Key words : risk assessment, accident prevention, vulnerable class, worker participation

• Proceedings of the Safety Management and Science Conference
• /
• 2007.11a
• /
• pp.425-432
• /
• 2007

In the policy management of the safety&health, the environment and the quality, the documentation of the management system is required in every international regulatory guides. In case of 3 level classification of the system documents, it generally will be identified such name as the manual, the procedure and the job instruction. Each document has the unique role and usage though, the job instructions, especially, would be developed to support the practical job worker. So, the job instructions should be reflect the latest know-how of the job-handling methods. And that, it should be used at any times by the practical job worker. This study is planned to survey the actual usage status of the job instructions of the domestic enterprises, and tried to suggest the effective way of maintaining the documents.

• Proceedings of the Korean Society of Computer Information Conference
• /
• 2017.01a
• /
• pp.7-8
• /
• 2017

각종 산업현장에서 작업자들의 안전 불감증으로 인해 발생하는 안전사고는 매년 꾸준히 증가하고 있는 추세이다. 본 논문에서 제안하는 스마트 작업자 안전벨트 및 행동인식 기반 위험경보 시스템은 이러한 상황을 방지하고자 작업자가 안전벨트의 훅을 제대로 걸지 않고 일을 진행하는 경우, 작업장 내에서 뛰어다니는 경우, 잘못된 자세로 일하는 경우를 시스템에서 인지하고 작업자, 관리자에게 알림을 줌으로서 작업자의 안전사고를 예방할 수 있도록 하였다.

• Journal of the Korea Safety Management & Science
• /
• v.5 no.3
• /
• pp.99-106
• /
• 2003

This study concerns with an ergonomic approach for improving the workplace of an air-conditioner factory. If work tasks and equipments do not include ergonomic principles in their design, workers may have exposure to undue physical stress, strain, and overexertion, including awkward postures, forceful exertions, repetitive motion, and heavy lifting. The purpose of this study is to improve the safety, comfort, and efficiency of the workplace. Adapting tasks, work stations, tools, and equipments to fit the worker can help reduce physical stress on a worker's body and enhance the effectiveness and efficiency of workplace.

• Journal of the Korea Safety Management & Science
• /
• v.16 no.4
• /
• pp.257-262
• /
• 2014

Risk information may be one of the most important factor for worker's safe behavior because that safe behavior can be oriented by attitude based on risk information. Traditionally KAP(knowledge, attitude and practice) model was useful frame for the change of human behavior. Knowledge is formed by information through experience and education. Worker's health may be prevented by his or her own active safe behavior based on risk information. This paper is to investigate the effect of labor union on the provirion of risk information by labor union. Data for analysis is the third Korean Working Conditions Survey done by Occupational Safety and Health Research Institute in 2011. The sample size is 50,032 economic active person surveyed by household interview survey with structure questionnaire by trained interviewer. The difference of risk information provision among employees was tested by mean difference test. The level of risk information of employees of companies with labor union is higher than that with non labour union. This paper has some implication for the promotion of safe behavior of employees through risk information provision mediated by labor union. Some limitation of this study may be considered because of using the cross sectional survey data.