Combining Indoor Positioning Using Wi-Fi Round Trip Time with Dust Measurement in the Field of Occupational Health

Monitoring of personal exposure to hazardous substances has garnered increasing attention over the past few years. However, no straightforward and exact indoor positioning technique has been available until the recent discovery of Wi-Fi round trip time (Wi-Fi RTT). In this study, we investigated the...

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Autores principales:	Hajime Ando, Shingo Sekoguchi, Kazunori Ikegami, Hidetaka Yoshitake, Hiroka Baba, Toshihiko Myojo, Akira Ogami
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	indoor positioning Wi-Fi RTT occupational health wearable particle monitor Chemical technology TP1-1185
Acceso en línea:	https://doaj.org/article/fb7709db5e434d2a95135cf5ad610d4e
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id	oai:doaj.org-article:fb7709db5e434d2a95135cf5ad610d4e
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spelling	oai:doaj.org-article:fb7709db5e434d2a95135cf5ad610d4e2021-11-11T19:13:28ZCombining Indoor Positioning Using Wi-Fi Round Trip Time with Dust Measurement in the Field of Occupational Health10.3390/s212172611424-8220https://doaj.org/article/fb7709db5e434d2a95135cf5ad610d4e2021-10-01T00:00:00Zhttps://www.mdpi.com/1424-8220/21/21/7261https://doaj.org/toc/1424-8220Monitoring of personal exposure to hazardous substances has garnered increasing attention over the past few years. However, no straightforward and exact indoor positioning technique has been available until the recent discovery of Wi-Fi round trip time (Wi-Fi RTT). In this study, we investigated the possibility of using a combination of Wi-Fi RTT for indoor positioning and a wearable particle monitor (WPM) to observe dust concentration during walking in a simulated factory. Ultrasonic humidifiers were used to spray sodium chloride solution inside the factory. The measurements were recorded three times on different routes (Experiments A, B, and C). The error percentages, i.e., measurements that were outside the expected measurement area, were 7% (49 s/700 s) in Experiment A, 2.3% (15 s/660 s) in Experiment B, and 7.8% (50 s/645 s) in Experiment C. The dust measurements were also recorded without any obstruction. A heat map was created based on the results from both measured values. Wi-Fi RTT proved useful for computing the indoor position with high accuracy, suggesting the applicability of the proposed methodology for occupational health monitoring.Hajime AndoShingo SekoguchiKazunori IkegamiHidetaka YoshitakeHiroka BabaToshihiko MyojoAkira OgamiMDPI AGarticleindoor positioningWi-Fi RTToccupational healthwearable particle monitorChemical technologyTP1-1185ENSensors, Vol 21, Iss 7261, p 7261 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	indoor positioning Wi-Fi RTT occupational health wearable particle monitor Chemical technology TP1-1185
spellingShingle	indoor positioning Wi-Fi RTT occupational health wearable particle monitor Chemical technology TP1-1185 Hajime Ando Shingo Sekoguchi Kazunori Ikegami Hidetaka Yoshitake Hiroka Baba Toshihiko Myojo Akira Ogami Combining Indoor Positioning Using Wi-Fi Round Trip Time with Dust Measurement in the Field of Occupational Health
description	Monitoring of personal exposure to hazardous substances has garnered increasing attention over the past few years. However, no straightforward and exact indoor positioning technique has been available until the recent discovery of Wi-Fi round trip time (Wi-Fi RTT). In this study, we investigated the possibility of using a combination of Wi-Fi RTT for indoor positioning and a wearable particle monitor (WPM) to observe dust concentration during walking in a simulated factory. Ultrasonic humidifiers were used to spray sodium chloride solution inside the factory. The measurements were recorded three times on different routes (Experiments A, B, and C). The error percentages, i.e., measurements that were outside the expected measurement area, were 7% (49 s/700 s) in Experiment A, 2.3% (15 s/660 s) in Experiment B, and 7.8% (50 s/645 s) in Experiment C. The dust measurements were also recorded without any obstruction. A heat map was created based on the results from both measured values. Wi-Fi RTT proved useful for computing the indoor position with high accuracy, suggesting the applicability of the proposed methodology for occupational health monitoring.
format	article
author	Hajime Ando Shingo Sekoguchi Kazunori Ikegami Hidetaka Yoshitake Hiroka Baba Toshihiko Myojo Akira Ogami
author_facet	Hajime Ando Shingo Sekoguchi Kazunori Ikegami Hidetaka Yoshitake Hiroka Baba Toshihiko Myojo Akira Ogami
author_sort	Hajime Ando
title	Combining Indoor Positioning Using Wi-Fi Round Trip Time with Dust Measurement in the Field of Occupational Health
title_short	Combining Indoor Positioning Using Wi-Fi Round Trip Time with Dust Measurement in the Field of Occupational Health
title_full	Combining Indoor Positioning Using Wi-Fi Round Trip Time with Dust Measurement in the Field of Occupational Health
title_fullStr	Combining Indoor Positioning Using Wi-Fi Round Trip Time with Dust Measurement in the Field of Occupational Health
title_full_unstemmed	Combining Indoor Positioning Using Wi-Fi Round Trip Time with Dust Measurement in the Field of Occupational Health
title_sort	combining indoor positioning using wi-fi round trip time with dust measurement in the field of occupational health
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/fb7709db5e434d2a95135cf5ad610d4e
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Combining Indoor Positioning Using Wi-Fi Round Trip Time with Dust Measurement in the Field of Occupational Health

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