- 學位論文
基於ZigBee/Ethernet異質網路之居家監護系統
Home Care System Based on ZigBee/Ethernet Heterogenous Network
摘要
居家監護系統早已行之有年，而以往系統的建置與監測節點是以有線的方式佈建而成，對於新設與後續的維修都相當的不方便。近年來因科技的進步，無線通訊結合居家監護系統的實踐也被廣泛的提出討論與應用，但無線通訊於室內居家環境建置上最大的問題就是無線訊號往往難以克服建築物本身空間設計與使用建材所造成的屏蔽效應，因此至今仍未能普及應用。基於此點，本論文研究採用以ZigBee無線感測網路為主要的居家空間環境監測系統與受照護者的生理參數傳輸方式，並設計一橋接裝置完成ZigBee to Ethernet的異質網路傳輸機制，在無線感測節點無法佈建的區域，透過橋接裝置轉由乙太網路完成資料傳輸。 本研究所提出的異質網路居家監護系統可分為前端的訊號擷取平台與後端的資料管理顯示，前端的訊號擷取平台為生理參數擷取裝置與環境因子感測暨路由裝置所組成，生理參數擷取裝置以操作簡易為考量，用於擷取受照護者的血壓、心率與血糖等生理參數，環境因子感測暨路由裝置用於居家環境因子如溫度與濕度數值的監測。上述訊號經無線感測網路橋接裝置由乙太網路送至後端伺服器，伺服器將資料儲存於資料庫並編譯為PHP網頁內容，受照護者或家屬與負責的醫事人員可透過網路瀏覽器在網頁上查詢並檢視記錄與趨勢變化。 經實際測試，裝置之間最遠有效傳輸距離為100公尺(室內空間)，生理參數擷取裝置因有資料保存與重發機制，封包傳輸遺失率為零；環境因子感測暨路由裝置的環境因子量測部分，誤差值與市售儀器測得比較：溫度差約±1℃，而濕度差則在±5％；無線感測網路橋接裝置在接收封包的遺失率統計最大為2.3%，最小為1.7%，而在乙太網路的封包傳輸遺失率為0，PHP網頁顯示在市占率較高的網路瀏覽器(如Internet Explorer、Firefox與Chrome等)皆能正常開啟。
並列摘要
Homecare system has been in use for several years. The previous system implementation and monitoring node makes use of wires. The same is used for the maintenance of new and follow-up are quite convenient. In recent years due to advances in technology, combined with wireless communications the practice of home care systems have been widely discussed and applied. But the biggest problem in wireless communications in indoor home environment to build is that wireless signals are often difficult to overcome the building itself, space design and use of building materials caused by the shielding effect, it is still not generalizable. For this reason, this thesis uses the ZigBee wireless sensor network for the main environmental monitoring system in the living space and by the caregivers of the transmission of physiological parameters. The design is a complete ZigBee to Ethernet bridge device of the heterogeneous network conversion mechanism. Wireless sensor nodes can’t be provisioned areas, through bridge devices to switch from the Ethernet cable to complete data transmission. The research about the heterogeneous network in homecare systems can be divided into two parts. The signal acquisition front-end and data management and display system back-end. First is the Signal acquisition platform front-end by the environmental factors sensing with routing device and the bio-signal capture device are composed, The environmental factors sensing with routing device such as temperature and humidity value of monitoring and transmission. In based on design user friendly, designed the bio-signal capture device to capturing blood pressure, heart rate and blood glucose. The signal through the wireless sensor network bridge device to bridged Ethernet, and send that to the back-end server and the server will store these data in the database. The signal through the wireless sensor network bridge device to bridged Ethernet, and send that to the back-end server and the server will store these data in the database, and set up the PHP Web pages. The patient or family members and medical personnel can via the web browser to search and view the records and change in trends. By the actual test, the device farthest effective transmission distance is 100 meters (indoor space). Because possess of the data storage and resend mechanism, the physiological parameters capture device's transmission data packet loss rate is zero. The environmental factors sensing with routing device function for measurement environmental factors, the measured values compare with commercially available Equipment's measured values : the temperature error value about ± 1 ℃,and the humidity error value about ± 5%. The Wireless sensor network bridge device receives the packet loss rate by the statistical, maximum of 2.3%, minimum of 1.7% ,and the Ethernet transmission packet loss rate was 0. By test in the more popular web browsers (e.g. Internet Explorer, Firefox and Chrome, etc.), the PHP web pages can be running normally.