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以虛擬實境技術發展動作控制評估工具 = Employ virtual r...

李宜蓁

以虛擬實境技術發展動作控制評估工具 = Employ virtual reality technique to develop motor control estimation : 初步探討; A pilot study

紀錄類型:	書目-語言資料,印刷品 : 單行本
並列題名:	Employ virtual reality technique to develop motor control estimation
副題名:	初步探討
作者:	李宜蓁,
其他作者:	紀偉民,
其他作者:	裴駿,
出版地:	[南投縣]
出版者:	南開科技大學福祉科技與服務管理研究所;
出版年:	民101[2012]
面頁冊數:	10,59葉 : 圖,表 ; 31公分+1張光碟
標題:	虛擬實境技術
標題:	Virtual reality technique
電子資源:	http://handle.ncl.edu.tw/11296/ndltd/21823838021476640561
摘要註:	目的：本研究藉由虛擬實境技術(Virtual Reality)發展動作評估(motor assessment)工具，並透過此工具能有效地評估受測者的動作控制能力(motor control)。方法：本研究應用虛擬實境技術(Virtual Reality)建立人模(Digital Human Model, DHM)及人形框(posture model)，搭配動作捕捉系統(motion capture system, MoCap)所提供的受測者的即時動作，在虛擬場景(virtual environment)中進行互動。同時利用身體質量中心(Center of Mass, COM)移動軌跡線在側向(lateral-medial)(X)與前後(anterior-posterior)(Y)方向的位移變化量標準差(Standard Deviation)和移動軌跡線長度，作為本研究量化(quantification)評估的參數。年輕受測者平均年齡為24歲，有7位受測者，高齡受測者平均年齡約為65歲，有10位受測者。利用二種人形框尺寸相對於二種人形框移動速度設計出四種不同的評估參數。人形框尺寸參數設計為寬度大的人形框在進行實驗時是較為容易讓虛擬人模維持於人形框內，反之寬度小的人形框形狀較貼近虛擬人模(DHM)。人形框移動時間分別為一秒及五秒。藉此探討年齡和這四種不同評估參數對受測者單腳站立之姿勢穩定性(posture stability)的影響。結果：(1)分別在框尺寸大和小的條件下，二種框移動速度對於年輕受測者COM在橫截面上X方向位移變化程度及軌跡長的影響達到顯著。然而，在大人形框下，二種框移動速度對於年輕受測者COM在Y方向達到顯著，小人形框下則接近顯著。(2)相同地，僅在大框的條件下，二種框移動的速度對於高齡受測者COM在X方向上位移變化程度影響達顯著，小框則無顯著。分別在框尺寸大和小的條件下，不同的框移動速度對於高齡受測者COM在Y方向位移變化程度都未達顯著。在大框的條件下，框移動速度對於高齡受測者COM在軌跡長的變化接近顯著，小框的條件下則無影響。(3)分別在框移動速度快和慢的條件下，框尺寸大小對年輕和高齡受測者COM位移變化及其軌跡線長度之影響皆無顯著性。結論：本實驗所設計的虛擬實境(Virtual Reality)評估工具的功能如下，不論使用大人形框還是小人形框，二種不同框移動速度對年輕受測者COM的X方向位移變化及軌跡線長度變化的影響具有顯著性。但高齡受測者則需在大框條件下，框移動速度對其COM的X方向之動作控制影響才有顯著性，小人形框則皆無影響。

以虛擬實境技術發展動作控制評估工具 = Employ virtual reality technique to develop motor control estimation : 初步探討; A pilot study
李, 宜蓁

以虛擬實境技術發展動作控制評估工具 = Employ virtual reality technique to develop motor control estimation : 初步探討 / 李宜蓁 - [南投縣] : 南開科技大學福祉科技與服務管理研究所, 民101[2012]. - 10,59葉 ; 圖,表 ; 31公分.
虛擬實境技術Virtual reality technique

紀, 偉民

以虛擬實境技術發展動作控制評估工具 = Employ virtual reality technique to develop motor control estimation : 初步探討; A pilot study
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330 $a 目的：本研究藉由虛擬實境技術(Virtual Reality)發展動作評估(motor assessment)工具，並透過此工具能有效地評估受測者的動作控制能力(motor control)。方法：本研究應用虛擬實境技術(Virtual Reality)建立人模(Digital Human Model, DHM)及人形框(posture model)，搭配動作捕捉系統(motion capture system, MoCap)所提供的受測者的即時動作，在虛擬場景(virtual environment)中進行互動。同時利用身體質量中心(Center of Mass, COM)移動軌跡線在側向(lateral-medial)(X)與前後(anterior-posterior)(Y)方向的位移變化量標準差(Standard Deviation)和移動軌跡線長度，作為本研究量化(quantification)評估的參數。年輕受測者平均年齡為24歲，有7位受測者，高齡受測者平均年齡約為65歲，有10位受測者。利用二種人形框尺寸相對於二種人形框移動速度設計出四種不同的評估參數。人形框尺寸參數設計為寬度大的人形框在進行實驗時是較為容易讓虛擬人模維持於人形框內，反之寬度小的人形框形狀較貼近虛擬人模(DHM)。人形框移動時間分別為一秒及五秒。藉此探討年齡和這四種不同評估參數對受測者單腳站立之姿勢穩定性(posture stability)的影響。結果：(1)分別在框尺寸大和小的條件下，二種框移動速度對於年輕受測者COM在橫截面上X方向位移變化程度及軌跡長的影響達到顯著。然而，在大人形框下，二種框移動速度對於年輕受測者COM在Y方向達到顯著，小人形框下則接近顯著。(2)相同地，僅在大框的條件下，二種框移動的速度對於高齡受測者COM在X方向上位移變化程度影響達顯著，小框則無顯著。分別在框尺寸大和小的條件下，不同的框移動速度對於高齡受測者COM在Y方向位移變化程度都未達顯著。在大框的條件下，框移動速度對於高齡受測者COM在軌跡長的變化接近顯著，小框的條件下則無影響。(3)分別在框移動速度快和慢的條件下，框尺寸大小對年輕和高齡受測者COM位移變化及其軌跡線長度之影響皆無顯著性。結論：本實驗所設計的虛擬實境(Virtual Reality)評估工具的功能如下，不論使用大人形框還是小人形框，二種不同框移動速度對年輕受測者COM的X方向位移變化及軌跡線長度變化的影響具有顯著性。但高齡受測者則需在大框條件下，框移動速度對其COM的X方向之動作控制影響才有顯著性，小人形框則皆無影響。 $u Purpose: This study developed a tool for motor assessment by means of a virtual reality technique, and applied this tool to estimate a subject’s motor control ability. Method: A Virtual reality technique was applied to establish digital human model (DHM) and posture models, and to cooperate with motion capture (MoCap) system recording real-time action of the subject, human- posture model interaction is being performed in the virtual environment. Simultaneously, this study used a standard deviation on lateral-medial (X) and anterior-posterior (Y) directions, and the length of trajectory to quantified trajectory displacement of center of mass (COM) during single leg standing. Subjects were divided two groups by age, seven young subjects average aged 24 and ten elder subjects average aged 65. This investigation used two dimensions and two kinds of moving speeds of a posture model to design four different assessment parameters. A posture model’s dimensions were designed to let DHM to be kept within the model easier for the wider width during the MoCap experiment, on the contrary, harder for the narrower width being closer to DHM. Two kinds of moving speeds implied a posture model moving from 3 met rs distance to DHM in the virtual reality environment with one and five seconds respectively. The stability of one leg standing would be estimated and studied under age and four different assessment parameters. Results: (1) Under wider or narrower width of posture model conditions respectively, two kinds of moving speed of a posture model affected significantly on standard deviation of COM trajectory displacement on x direction and the length of trajectory for young group. Similarly, under wider width of posture model conditions, two kinds of moving speed also affected significantly on standard deviation of COM trajectory displacement on y direction for young group. But, under narrower width of posture model conditions, it affected close to significantly on y direction. (2)Similarly, only under wider width of posture model conditions, two kinds of moving speeds of posture model affected significantly on standard deviation of COM trajectory displacement on x direction for elder group, but it affected no significantly under narrower width condition. Under wider or narrower width of posture model conditions respectively, two kinds of moving speed of a posture model affected no significantly on standard deviation of COM trajectory displacement on y direction for elder group. Only under wider width of posture model conditions, two kinds of moving speeds also affected close to significantly on standard deviation of COM trajectory displacement on length of trajectory for elder group, but it affected no significantly under narrower width condition. (3)No matter under what kinds of moving speeds of posture model, two different dimensions of posture models affected no significantly on standard deviation of COM trajectory displacement on two directions and length of trajectory for two groups. Conclusions: The functions of the virtual reality assessment tool this study developed were: No matter wider or narrower width of postural models, two kinds of moving speeds of postural model had significant effects on displacement of COM on X direction and on length of trajectory for young group. But, for elder group only under wider width of postural model condition, moving speed of postural model had significant effects on displacement of COM on x direction, and it affected no significantly under narrower width condition.
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