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Autonomous Detection System for Non-Hard-Hat Use at Construction Sites Using Sensor Technology

1
Department of Civil and Environmental Engineering, Hanyang University, Seoul 04763, Korea
2
Research and Development Centre, Youngshine D&C, Gyeonggi-do 13487, Korea
*
Author to whom correspondence should be addressed.
Academic Editor: Ali Bahadori-Jahromi
Sustainability 2021, 13(3), 1102; https://doi.org/10.3390/su13031102
Received: 29 December 2020 / Revised: 18 January 2021 / Accepted: 19 January 2021 / Published: 21 January 2021
(This article belongs to the Section Sustainable Engineering and Science)
In this study, we present a novel method of detecting hard hat use on construction sites using a modified version of an off-the-shelf wearable device. The data-transmitting node of the device contained two sensors, a photoplethysmogram (PPG) and accelerometers (Acc), along with two modules, a global positioning system (GPS) and a low-power wide-area (LoRa) network module. All the components were embedded into a microcontroller unit (MCU) in addition to the power supply. The receiving node included a server that displayed the results via both the Internet of Things (IoT) and smartphones. The LoRa network connected two nodes so that it could function in larger areas such as construction sites at a relatively low cost. The proposed method analyzes the data from a PPG sensor located on the hard hat chin strap and automatically notifies a manager when a worker is not wearing the required hard hat at the site. In addition, by utilizing the PPG sensor data, a heart rate abnormality-detecting feature was added based on an age-adjusted maximum heart rate formula. In validation tests, various PPG sensor locations and shapes were studied, and the results demonstrated the smallest error in the circular shaped sensor located at the upper neck (0.56%). Finally, an IoT monitoring page was created to monitor heart rate abnormalities while identifying hard hat use violations via both PCs and smart phones. View Full-Text
Keywords: hard hat; sensor technology; construction; safety; detection; web monitoring hard hat; sensor technology; construction; safety; detection; web monitoring
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MDPI and ACS Style

Kim, J.H.; Jo, B.W.; Jo, J.H.; Lee, Y.S.; Kim, D.K. Autonomous Detection System for Non-Hard-Hat Use at Construction Sites Using Sensor Technology. Sustainability 2021, 13, 1102. https://doi.org/10.3390/su13031102

AMA Style

Kim JH, Jo BW, Jo JH, Lee YS, Kim DK. Autonomous Detection System for Non-Hard-Hat Use at Construction Sites Using Sensor Technology. Sustainability. 2021; 13(3):1102. https://doi.org/10.3390/su13031102

Chicago/Turabian Style

Kim, Jung H., Byung W. Jo, Jun H. Jo, Yun S. Lee, and Do K. Kim 2021. "Autonomous Detection System for Non-Hard-Hat Use at Construction Sites Using Sensor Technology" Sustainability 13, no. 3: 1102. https://doi.org/10.3390/su13031102

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