| Summary: | 碩士 === 國立中央大學 === 環境工程研究所 === 92 === In this study, two field tests, both tape manufactures,have been conducted to verify the performance of the Exposure-based Personal Alarm System(or EPAS) under real world situations. The EPAS can continuously identify worker’s position by building infrared communication channels between client transmitters and host stations. Once a host station receives worker’s ID, it sends the ID number, along with local chemical concentration, back to a server through local area network(LAN). Unlike the laboratory environment where connecting devices through wired LAN is relatively easy, we used a miniature wireless access point from ASUSTek Computer Inc. in the factories for data transmissions to minimize the effort of connecting host devices.
In the field studies, selected workers were asked to put client transmitters on the wrest and students who also ware transmitters were assigned to observe and record worker’s activities in several predefined area. The results from both sites showed no significant differences between data reported by direct observations and those measured by the EPAS system (R2>0.92). The success of both field studies indicated that the EPAS can be used in real working environments.
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