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

Abstract

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.

The Barcelona Conference on Education 2023: Official Conference Proceedings

“…In the first stage, several criteria were initially applied to exclude studies, including those less than three pages in length, not written in English, articles that are not related to RFTs and VFTs. After this stage of the screening, 37 articles ([1], [2], [3] [8], [13], [14], [15], [16], [17], [19], [20], [21], [22], [23], [26], [27], [28], [29], [37], [39], [42], [44], [45], [49], [50], [51], [52], [55], [58], [59], [60], [61], [62], [63], [67], [68], [69]) were selected for full text assessment. The second stage of the screening process involved reading title, keywords, and abstract to identify studies that are relevant to RFTs and VFTs that had been peer reviewed in an educational context.…”

“…Level of fear (1)(2)(3)(4)(5)(6)(7)(8)(9)(10) Student self-report at the start of the semester Student self-report at the end of the semester 1-2 According to the opinions of teachers who taught both theory and AR in the course, students significantly improved their practical welding skills during the course. The student's performance showed that AR helped students learning better.…”

“…VFTs are also useful when it is not possible to visit certain sites due to time, safety and health concerns, financial constraints, or weather conditions (Evelpidou et al,[14]). According to Ando et al, [2], indoor positioning technology and low-cost dust sensors can help visualize hazardous material exposure in order to reduce exposure and prevent health problems. VFTs make it possible for marginalized students to participate in fieldwork that would otherwise be impossible.…”

“…The diversity of data analysis techniques used in articles that have been analyzed in this study is presented in Figure 5. Based on the graphs shown in Figure 5, the most commonly used data analysis techniques were descriptive analysis (22) then correlational (4), data compilation and analysis ( 4), logistic regression (3), policy analysis (3), regression (2), and descriptive and inferential analysis (2). There were other analysis techniques applied by the studies among them narration, theoretical analysis, scoping review, content analysis, context and practice analysis, literature review and case collection and analysis.…”

“…After that purely disability ( 9) has the second position. Then the other studies subjects were rounded up on special school teachers (2), people with disabilities (2), visually impaired students (2), poor and disadvantaged ethnic groups (2). Besides these, other subject studies were classroom, students with or without disabilities, special and general school teachers, girls with disability, early children living with disabilities, students with intellectual disabilities, marginalized groups and special needs education.…”