以模糊方法判斷使用智慧型拐杖或雨傘者其行走姿態

隨著人口老化，近五、六年來因腦部神經退化，罹患帕金森氏症的患者也大增逾三成，目前統計顯示全臺約有五萬名患者。帕金森氏症是高齡者普遍罹患的病變之一，其症狀主要有動作遲緩、手腳顫抖、四肢僵硬、缺乏平衡反應等異常步態產生，而導致跌倒風險提高。因此，本研究將設計一套適用於帕金森氏症患者或老年人之智慧型拐杖或雨傘裝置。當發生跌倒意外事件時，如何迅速有效地提醒周邊的人進行即刻救援是相當重要的。目前市面上有不同類型的輔具，依便利性與攜帶性而言，多數老年人會選擇拐杖或雨傘作為輔助行動的工具。本研究利用具有三軸加速度感測器附加在拐杖或雨傘用於收集使用者行走時的步態數據，並將資料傳送至智慧型手機資料庫中儲存，藉由所提模糊推論方法來定義使用者當前狀態並判斷是否有步態異常情況發生，當偵測到跌倒時自動發出警示聲，通知醫護人員進行必要處置。本系統於行走期間判斷是否跌倒的準確率為94.6%，步態判別之準確率為91.5%，此研究結果將有助於發展老年人之步態分析與預防跌倒危險或復健評估之依據。

關鍵字

模糊推論；跌倒偵測；智慧型拐杖；三軸加速度感測器；步態判別

並列摘要

With an aging society, it introduces various types of brain degenerative disorders. One of the most common disease to Parkinson's disease. It is the constant and progressive deterioration of nerve cells mostly found in elderly people. This disease has increased up to 30% and according to the statistics approximately fifty thousand people suffer from this disorder in Taiwan. The symptoms of this disease include slow movements, trembling hands and feet, stiff limb, lack of balance leading to abnormal gait and increased risk of falls. This study designs a system which can be useful in such situations. It is a device attached to cane or umbrella and whenever a fall accident occurs it notifies nearby people for the immediate rescue. At present, there are different types of auxiliary tools available in the market, but for the convenience and ease of elderly people cane and umbrella are used here which are most suitable for them to carry and can be used as auxiliary tools. Triaxial accelerometer attached to a cane or umbrella is used to collect user's gait data when walking, and sends them to a database stored in smartphone. A fuzzy inference method is proposed to determine whether the user has abnormal gait and if it detects any fall accident it automatically sends out warning sound and notifies the medical personnel. The system provides 94.6% fall accuracy rate while walking and 91.5% accuracy rate for gait analysis. The results of this study will contribute to the development of elderly gait analysis and prevents many fall accidents to happen in advance.

並列關鍵字

fuzzy inference ； fall detection ； smart cane ； accelerometer ； gait analysis

參考文獻

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國際替代計量

以模糊方法判斷使用智慧型拐杖或雨傘者其行走姿態

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