台北都會區大眾捷運系統已成為台北市及新北市交通輸運不可缺的重要交通工具,早期台北捷運高運量系統並未裝設有月台閘門與全罩式月台門,後來因落軌事件層出不窮已威脅到行車安全,而安全意識提高以及顧及擁擠的月台乘客安全,目前捷運公司將會全面在已通車或未通車站台加裝月台門以防止人員或異物落軌事件。由於目前捷運公司的月台門的控制方式是由列車以無線電發射控制月台門開啟及關閉,但此無線電控制系統並無加密機制,無線電傳送的曝露讓有心人很容易監聽擷取並複製命令進行干擾,月台門啟用至今也已經有多次無線電被不明干擾,造成行車安全,捷運公司也為此開始思考此問題,但因牽涉作業程序及既有系統的改造困難重重,仍無具體方案,所以本研究在成本及捷運公司的特有作業程序考量下,設計一個無線控制加密機制來改進現行捷運月台門系統。 由於此加密機制是應用在大眾運輸系統上,在可靠度的要求及風險預防是考量的重點,所以在系統設計時,將會以失效模式效應分析(FMEA)手法加上實驗模擬測試求得量化數據,並藉由失效的分析及各種故障的可能性考量,修正可靠的矯正措施及預防方法,進而利用系統模擬驗證本研究論文技術與成本的可行性,最後期能提供給大眾捷運公司作為系統改善的參考,提升大台北都會區大眾捷運系統之行車安全。
The Taipei Metro (MRT) has become the essential transportation system in Taipei, even across the New Taipei City. In the beginning, It was not equipped with the Platform Screen Doors System (PSD). Due to the increase of number of people falling down on the tracks which is also threatened the public safety; Safety awareness comes to a wide range of subject. In order to avoid the similar cases, The Taipei Metro is now installing PSD System to protect passengers’ safety, even increase the level of public safety. Currently, the platform doors remote to open or close by a wireless radio transmitter emit from trains. The signals are not encrypted and easily to capture or copy by people with bad intention. Since the formal using platform doors, the signals has been interrupted several times by unknown wave and danger to traffic safety. The Taipei Metro start thinking the way to solve this problem. In the view to complicate evaluation process and difficult to reform the existing systems, no conclusion was made so far. This study aims to find the solution -- build a simple encryption mechanism based on existing MRT PSD control system after considering the cost and unique evaluation process at the Taipei Metro. Because this encryption scheme is applied to the public rapid transit systems, the requirements for reliability performance and risk prevention are the key points. Failure mode and effects analysis (FMEA) techniques will be used to design the system. In additional to quantitative data obtained from experimental simulation tests, failure analysis and various possibilities of malfunction, by making the corrections and prevention to verify the practicality of this study. Also, this would provide a further reference to the Taipei Metro to improve their system.