• 한국정보통신학회논문지
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• 제19권3호
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• pp.724-730
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• 2015

각종 산업현장의 현장 작업자들이 안전 벨트를 제대로 착용하지 않아서 발생하는 안전사고는 매년 꾸준히 증가하고 있는 추세이다. 본 논문에서 제안하는 개인 안전벨트 모니터링 시스템은 작업자가 안전벨트를 착용하지 않고 작업을 진행할 경우 알림음을 울림으로써 작업자가 안전벨트를 제대로 착용하도록 하였다. 또한 그와 동시에 관리자가 실시간으로 작업자들의 안전 벨트 착용 여부를 모니터링함으로써 안전장비를 제대로 착용하지 않아서 발생하는 안전사고를 예방할 수 있도록 하였다.

• 한국컴퓨터정보학회논문지
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• 제23권2호
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• pp.63-70
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• 2018

Safety management agent manages the risk behavior of the worker with the naked eye, but there is a real difficulty for one the agent to manage all the workers. In this paper, IoT device is attached to a harness safety belt that a worker wears to solve this problem, and behavior data is upload to the cloud in real time. We analyze the upload data through the deep learning and analyze the risk behavior of the worker. When the analysis result is judged to be dangerous behavior, we designed and implemented a system that informs the manager through monitoring application. In order to confirm that the risk behavior analysis through the deep learning is normally performed, the data values of 4 behaviors (walking, running, standing and sitting) were collected from IMU sensor for 60 minutes and learned through Tensorflow, Inception model. In order to verify the accuracy of the proposed system, we conducted inference experiments five times for each of the four behaviors, and confirmed the accuracy of the inference result to be 96.0%.

• 한국산업보건학회지
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• 제19권3호
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• pp.182-194
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• 2009

This study was conducted to evaluate health status and to propose health protection measures of irregular plant construction workers in Yoesu National Industrial Complex (YNIC). The status of safety and health management was examined in five areas including safety and health education, work environment monitoring, health examination, health management record, and personal protective equipment (PPE) for plant construction workers. The safety training rate for plant construction workers was reached high at 91%, The training was mostly consisted of safety accident related things, but training on hazardous materials was found to be insufficient. Workplace monitoring results showed that the compliance rate for work environment for irregular construction workers was 54% and workplace monitoring during turnaround (TA) period with high risk of exposure to hazardous agents has not been implemented. While 61.4% of irregular workers received the general health examination but only 36.8% received the special health examination. The special health examination was found to be conducted only upon welders from 2-3 years ago. The issue of health management record upon irregular construction workers was not being implemented. In case of PPE, basic safety protective equipments such as safety shoes, safety belt, safety helmet were being supplied well while the supply rate of respirator for organic vapor was relatively low at 40%. Based on this study, two suggestions to maximize the utilization of the current safety and health program were made while boosting its effectiveness in protecting workers' health. First, the role of owners (petrochemical plant) related to safety and health should be strengthened. Second, in consideration of the characteristics of construction workers who usually engage in short term employment and frequent movement, community based health management organization is suggested that can overcome such structural problem and carry out the implementation of health examination and sustained health management.

• 한국IT서비스학회지
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• 제22권6호
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• pp.87-102
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• 2023

Existing child car seats do not have a monitoring means for the driver or guardian to effectively recognize the status of whether the seat belt of car seat is fastened and whether the ISOFIX of the car seat is fastened to the inside device of the vehicle. In this paper, we propose a smart car seat system which can monitor in real time, whether the seat belt of a child seated in the car seat is fastened and whether the ISOFIX of the car seat is fastened. The proposed system has been developed with a prototype, in which a Hall sensor, magnet, Bluetooth, and display device are used to detect whether these are fastened and to display the detection results. The prototype system provides the detection results as texts and alarm signal to the display for driver or guardian' smartphone in the car in motion. With functional tests of the prototype system, it was confirmed that the detection functions are properly operated, and the detection results were transmitted to the display device and smartphone via Bluetooth within 0.5 seconds. It is expected that the development system can effectively prevent safety accidents of child car seats.

• 한국컴퓨터정보학회:학술대회논문집
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• 한국컴퓨터정보학회 2019년도 제59차 동계학술대회논문집 27권1호
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• pp.57-58
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• 2019

본 논문에서는 앞서 진행한 연구들과 딥러닝을 이용한 고소작업자 행동 모니터링 논문에 이어 작업자 위험 행동분류 시스템을 개선할 수 있는 연구 결과를 비교, 설명한다. 이번 연구에서는 작업자의 행동에 따른 고도계 센서의 데이터를 추가로 수집하여 작업자의 더 다양한 행동을 분류하고 위험 행동 패턴 분석을 위한 방향을 제시한다.

• Smart Structures and Systems
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• 제31권3호
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• pp.301-309
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• 2023

Tilt is a key indicator of structural safety. Real-time monitoring of tilt responses helps to evaluate structural condition, enable cost-effective maintenance, and enhance lifetime resilience. This paper presents a prototype wireless sensing system for structural tilt measurement. Long range (LoRa) technology is adopted by the sensing system to offer long-range wireless communication with low power consumption. The sensor integrates a gyroscope and an accelerometer as the sensing module. Although tilt can be estimated from the gyroscope or the accelerometer measurements, these estimates suffer from either drift issue or high noise. To address this challenging issue and obtain more reliable tilt results, two sensor fusion algorithms, the complementary filter and the Kalman filter, are investigated to fully exploit the advantages of both gyroscope and accelerometer measurements. Numerical simulation is carried out to validate and compare the sensor fusion algorithms. Laboratory experiment is conducted on a simply supported beam under moving vehicle load to further investigate the performance of the proposed wireless tilt sensing system.

• 한국정보통신학회논문지
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• 제14권5호
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• pp.1303-1310
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• 2010

최근 운전자의 건강상태 모니터링 및 졸음운전 방지를 위한 자동차용 부품관련 센서개발 및 시스템 연구들이 국내외에서 활발히 진행되고 있다. 본 논문은 이러한 운전자의 건강 상태 및 졸음운전을 점검하기 위해 체스트벨트 심전도 (ECG)와 손목착용형 산소포화도 (SpO2) 센서를 제작하여 생체신호를 측정하였으며, 측정된 심전도, 산소 포화도, 그리고 심장박동수 신호는 무선센서네트워크를 통해 수집, 전송 및 모니터링 등의 처리를 가능하게 하여 운전자에게 안전운행을 위한 정보를 제공하도록 하였다. 원격지인 서버 PC와 연결된 베이스스테이션으로 수집된 심전도와 용적맥파 신호에서 HRV (Heart Rate Variability, 심박변이도) 신호를 검출하였으며, 검출된 HRV 신호를 시간 영역과 주파수 영역에서의 해석을 통하여 운전자의 스트레스 지수 및 졸음 상태의 실시간 모니터링 및 졸음상태의 운전자에게 주의를 제공하기 위하여 알람을 제공하는 형태의 지능형 모니터링 시스템을 구현하였다.

• 한국정보통신학회:학술대회논문집
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• 한국해양정보통신학회 2009년도 추계학술대회
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• pp.545-548
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• 2009

최근 운전자의 건강상태 모니터링 및 졸음운전 방지를 위한 자동차용 부품관련 센서개발 및 시스템 연구들이 국내외에서 활발히 진행되고 있다. 본 논문은 이러한 운전자의 건강상태 및 졸음운전을 점검하기 위해 체스트벨트(ECG)와 손목착용형 산소포화도($SpO_2$) 센서를 제작하여 생체신호를 측정하였으며, 측정된 심전도, 산소포화도, 그리고 심장박동수 신호는 센서네트워크를 통해 수집, 전송 및 모니터링 등의 처리를 가능하게 하여 운전자에게 안전운행을 위한 정보를 제공하도록 하였다. 원격지인 서버 PC와 연결된 베이스스테이션으로 수집된 심전도와 용적맥파 신호에서 HRV(Heart Rate Variability, 심박변이도) 신호를 검출하였으며, 검출된 HRV 신호를 시간 영역과 주파수 영역에서의 해석을 통하여 운전자의 스트레스 지수 및 졸음 상태의 실시간 모니터링 및 졸음 상태의 운전자에게 주의를 제공하기 위하여 알람을 제공하는 형태의 지능형 모니터링 시스템을 구현하였다.

• 한국학교보건학회지
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• 제10권2호
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• pp.193-211
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• 1997

The study was designed to gain necessary basic data in order to grasp the health knowledge, attitude, and practice level of students and teachers of elementary, middle and high schools. This study was conducted through interviews of 3,400 students and 1,022 teachers attending 14 different schools large, middle and small cities and rural towns during a period of nine months (from Oct. 2 1995 to Jun. 30 1996). By the results of this study, the recommendations can be summarized as follows: 1. A school health development committee should be established of 10 members: school health related teachers (physical trainers, nurses, and teachers in charge of health), parents, persons related to health administration, local medical doctors, and student reprensentatives in order to support and immplement school health development plans. 2. Like advanced countries, a health class of 2~4 hours should beplaced in middle and high schools. A nurse majoring in health from a university should be the teacher. 3. A curriculum of health should contain the following: education on health, sex, alcohol, tabacco, the misuse of the drugs, the structure and function of human body, the growth of the body, mental health, safety and emergency care, the prevention of disease, proper eating habits and nutrition, daily health life, family health education, society health, community health, environmental pollution and individual responsibility. 4. Create a school health promotion center, with a nurse's office, and a sports center which has health machines (bars, aerobics, training, twist machine, belt massage, running machine, bench press, chest waist, hack hip extension machine) as well as a physical strength measuring machine (muscular strength, alertness, flexibility, endurance, lung functions and so on), so that the teaching staff and students can use them and train their bodies. 5. Through a refresher education program, urge teachers to understand school health promotion services. 6. Regulate a standard and establish a system of monitoring the physical enviroment of the school (the height of desks and chairs, illumination facilities, ventilation facilities, safe drinking water). 7. Create a check list of health to evaluate improvement.