加速壽命試驗推估智能化產品壽命之R-Shiny應用程式：以電子式水量計為例

隨著物聯網技術的進步衍生出智慧城市的發展，水資源的數位化管理儼然成為未來居住空間的新指標。電子式水量計因其具有即時資料傳輸的智慧化功能，逐漸取代了傳統機械式水量計，成為當前市場的主流。然而，經由電子式水量計在案場實際使用後退回修理的資料發現，產品因溫度、濕度差所產生的膨脹、收縮效應使得螺絲鎖附處在使用環境中容易進水，進而影響傳輸訊號的功能，最後將導致失效，使得產品無法達到政府法規之年限要求。因此，本研究基於Hallberg-Peck模型進行了電子式水量計設計改進的加速壽命試驗，我們制訂了逐步的試驗程序與標準，蒐集了完整的失效數據，並建構R-Shiny互動式網頁應用程序供從業者快速、方便的使用進行數據的評估、估計和推論。最後，分析結果可為從業者規劃下一階段的設計變更或製造過程，提供具有價值的參考依據。

關鍵字

電子式水量計；加速壽命試驗；韋伯分布； R-Shiny設計；費雪信息矩陣

並列摘要

With the technological advancement of the internet of things, the development of smart cities has become imperative for the economic, social, and environmental sustainability of the country. Digitalization of water resources management is one of the sustainable indicators for future residential space. Electronic water meters with intelligent functions of real-time data transmission and storage have been replacing traditional mechanical water meters. However, the failed electronic water meters returned from the actual venues have a similar water-entry problem shown in the area of the screw locks. According to the fault analysis, the problem attributes to the expansion-contraction effects caused by temperature and humidity, which not only affects the accuracy of signal transmission but also accelerates meters failure, making the product unable to meet the lifetime requirement and government regulations. Therefore, in this research, we conducted an accelerated life testing based on the Hallberg-Peck model for the electronic water-meters design improvement. We established step-by-step testing procedures and standards in action. The complete failure data were collected; they were evaluated, estimated, and inferred by R-Shiny Interactive app, which is a user-friendly application for practitioners to enjoy an accessible, interactive interface for dealing with the complicated reliability model and data inference. Finally, the results can be a valuable reference for practitioners to plan the next stage of design changes or the manufacturing process.

並列關鍵字

electronic water meters ； accelerated life testing ； Weibull distribution ； R-Shiny design ； Fisher information matrix

參考文獻

沈盈志、王國雄，1997，掛載振動環境之步進頻譜加速試驗規格擬訂方法，中國航空太空學會學刊，29(1)，73-80。doi:10.6124/TAASRC.199703_29(1).08

沈盈志、廖建義，2009，廣義Weibull競爭失效模式之可靠度靈敏度分析，先進工程學刊，4(3)，213-218。doi:10.29948/JAE.200907.0003

Marais, J., Malekian, R., Ye, N. and Wang, R., 2016, A review of the topologies used in smart water meter networks: a wireless sensor network application, Journal of Sensors, 2016, 9857568. doi:10.1155/2016/9857568

Cher, M. T. and Singh, P., 2014, Time evolution degradation physics in high power white leds under high temperature-humidity conditions, IEEE Transactions on Device and Materials Reliability, 14(2), 742-750. doi:10.1109/TDMR.2014.2318725

Escobar, L. A. and Meeker, W. Q., 2006, A review of accelerated test models, Statistical Science, 21(4), 552-577. doi:10.1214/088342306000000321

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