臨床的平衡能力評估中,復健師常常透過平衡量表、平衡評估儀器與個人的姿勢控制能力等來檢測患者的平衡狀況,但這些評估方式不是較為主觀,便是無法即時紀錄患者姿勢,以進一步分析肢體動作,而隨著3D的熱門,虛擬實境(Virtual Reality;VR)與動作捕捉系統提供一個3D的視覺環境,讓受測者能融入於場景進行互動,並達到復健師所指定的評估動作,而利用動作捕捉系統將能擷取受測者的肢體動作,以進行量化分析。過去研究都只考慮讓受測者依照自己的方式來執行動作,並無設計不同參數來規定受測者欲執行的時間與角度等,然而在平衡能力評估中,復健師往往會希望能增加一些變數於執行動作中,以刺激受測者執行不同參數之動作,進而評估平衡能力表現。因此,本研究將發展一套以虛擬實境為基礎的新平衡測試系統,於虛擬場景中增加一個可調整參數的人形框,並評估健康正常人在不同人形框的參數與有無虛擬人模之視覺輔助中,姿勢反應的影響,實驗結果發現不同人形框參數會影響受測者之姿勢反應,而有無虛擬人模之視覺輔助會影響受測者執行動作時間的準確度與轉移重心的能力,故此創新結果將可更進一步發展與更完善,以輔助復健師設計客製化平衡能力評估系統。
In clinical balance assessment, the physical therapists use different methods to examine patients, such as balance scale, assessment equipment and personal posture control. However, these methods are subjective and unable to record real time posture to analyze motion. With recent technology, Virtual Reality (VR) and Motion Capture system are able to provide a 3D visual environment for subjects to interact and achieve required motions. Motion Capture system can capture the motion process. In past researches, the subjects motion without restricted time and angle which may be required for the balance assessment. The proposed VR-based balance test system with different parameter posture model (PM) performs evaluations in Virtual Environment (VE) with/without digital human model (DHM) for postural responses. The research result indicates that the PM parameter affects the subject’s postural responses. And the VE with/without DHM can affect motion implementation time and center of gravity shift of the subjects. Thus, such innovative findings can be further developed and refined for assisting physical therapist to design customized balance evaluation system.