原名「台灣學術線上」
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1
題名:Optimum Propulsion Technique in Different Wheelchair Handrim Diameter     (20點)
不同輪圈直徑之最佳推動技巧
著者:Lan-Yuen Guo(郭藍遠) ;Fong-Chin Su(蘇芳慶) ;Kai-Nan An(安介南)
出版地區:台灣
出版城市:台南市
學科:醫學綜合
關鍵字:輪椅 ; 生物力學 ; 最佳化 ; 模式 ; Wheelchair ; Biomechanics ; Optimization ; Model
刊名:Journal of Medical and Biological Engineering
卷期:22卷1期(2002.3)
頁碼:1-10
語言:英語
摘要: 中文摘要PDF ; 英文摘要PDF

由於輪椅使用者在損傷程度及與和輪椅配合情況有差異,使得不同受測者在輪椅推動表現差異很大;因此輪椅結構細微的改變,幾乎無法用客觀的實驗來印證。不過,此種結構細微改變卻很適用使用分析模式來探討,因為在模式中我們可以系統化地改變這些參數,而改變後的結果也可以很容易地被量化出來。因此我們發展一套包含上臂、前臂和輪圈的二度空間模式,來探討輪椅與使用者介面的改變;其中不同輪圈大小對輪椅最大前進力矩的影響,也將被探討。結果發現,輪圈直徑越大,最大前進力矩越大;不同輪圈直徑,施加在輪圈的切線分力相似;但輪圈直徑越小,施加在輪圈的軸向分力卻越大;而輪圈直徑越大,有效分力比率也越大。施加在輪圈的切線分力和輪椅前進力矩都是在輪椅推動末期達到最大值,此結果與文獻中的靜態輪椅推動結果相吻合,但是不同於動態輪椅的表現。在推動中期至末期,最佳輪椅推動向量並不是在接觸點輪圈的切線方向,且此向量方向會通過上臂肢段;這些都是和動態輪椅推動的表現相同。最佳化分析可以幫助我們瞭解不同輪圈直徑的影響,並且探討影響結果的相關特徵。同時藉由此模式分析,施力的機械限制和不適切的推動技巧也可以因此被進一步瞭解。
Variability in the propulsion technique to manual wheelchair users due to differences in level of injury and wheelchair fit makes detection of subtle changes in technique due to manipulation of individual variables nearly impossible. However, such changes are well suited to analytical modeling techniques, since variables can be manipulated systematically and the effects of the manipulation can be easily quantified. Therefore, we develop a simple two-dimensional model of the upper arm, forearm, and wheelchair wheel to study changes in wheelchair-user interface. Variations in handrim diameter were examined for their influence in the propulsive moment generated by each subject. The larger the handrim, the greater the moment about the wheel axle M(subscript r) could attain. The tangential force F(subscript t) applied to the handrim was similar among three handrim diameters. However, the radial component of force applied to the handrim increased as handrim diameter decreased. Increasing rim diameter increased the fraction effective force. Both predicted M(subscript r) and F(subscript t) reached the peak value in the terminal propulsion phase, in agreement with experimental results of the quasi-static wheelchair propulsion, but not dynamic, cyclic wheelchair propulsion. During the middle to terminal propulsion phase, the optimized force vector is not tangential to the handrim and instead, it pass through the upper arm segment which is comparable to dynamic wheelchair propulsion. Optimum analysis could help us to identify the effect of handrim diameter and investigate the related characteristics. Also, through modeling, the mechanical constraints of force application and the inadequate of pushing technique are further understood.




本卷期目次
Journal of Medical and Biological Engineering 22卷1期 (2002.3)
Optimum Propulsion Technique in Different Wheelchair Handrim Diameter/ Lan-Yuen GuoFong-Chin SuKai-Nan An
The Effect of Different Loading Conditions on the Motion Behavior of the Bipolar Hip Endoprostheses/ Chen-Yu LungTain-Hsiung ChenHung-Wen WeiWei-Hee LoCheng-Kung Cheng
Changes of Elbow Joint Load from Two-handed to One-handed Push-up Exercise/ Shu-Zon LouPei-Hsi ChouFong-Chin SuChii-Jeng LinYou-Li Chou
Dynamic Cooling for Laser Photocoagulation: In Vivo & Ex Vivo Studies/ Cheng-Jen ChangYih-Fong TzengFu-Chan Wei
Design and Fabrication of Multi-microelectrode Array for Neural Prosthesis/ Ming-Shaung JuHsin-Chun ChienGin-Shin ChenChou-Ching K. LinCheng-Hung ChangChi-Wen Chang
Multi-Parameter Evaluation of Brain Tumor with a WWW Based Multimedia Database System/ Ing-Yi ChenYuan-Yu HsuChi-Chen ChenKang-Ping Lin
Formation of Osteoclast-Like Cells after Electromagnetic Fields Stimulation and Different Periods of Ovariectomy: An In Vitro Rat Bone Marrow Culture Model/ Kyle ChangWalter Hong-Shong ChangYen-Shin YuChung Shih
 
   
 
   

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