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http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/53593
標題: | 光學式足壓及足弓指數量測系統之開發與研究 On the Development of the Optical Measurement System for Plantar Pressure and Arch Index |
作者: | Tse-Hsiang Wang 王則翔 |
指導教授: | 張培仁 |
關鍵字: | 光學式足壓量測系統,足底壓力,足弓指數,數位影像處理,灰階值, optical plantar pressure measurement,plantar pressure,arch index,image processing,gray level, |
出版年 : | 2015 |
學位: | 碩士 |
摘要: | 量測足壓及足弓指數是生物力學研究中的重要項目,量測之結果可以用於預防及治療某些疾病如糖尿病、癱瘓等。目前臨床研究中主要使用的有幾種量測足壓的方式:拓印式,利用實驗者踩在橡膠軟墊上分辨壓力大小;另外一種方式是電學式的壓力感測器,透過電阻、電容之改變進行壓力量測。此外還有光學式的足壓量測系統,藉由使用光敏材料及軟性材質來量測足底壓力。光學式量測系統的開發成本雖然較電學式量測系統低,但在量測壓力值大小及準確性上還不如電學式且目前還需要額外使用增益結構幫助量測。因此本研究希望能夠透過灰階值分析的方式開發一套新的光學式足壓量測系統改善量測壓力大小值的問題,並且簡化製成。
本研究利用數位影像處理及影像擷取系統開發出一套新的光學式足壓及足弓指數量測系統。與現有使用光敏元件及軟性材質開發的光學式量測系統不同,該系統使用數位相機直接擷取足底影像,藉由數位影像處裡之技術進行灰階值分析並找出灰階值與壓力值之關係,進而得到足底壓力分布情況。此外,利用將足底影像分區的方式可以輕易量測出足弓指數。系統組成簡單且其人機介面可以幫助使用者同時將足底壓力分佈、足弓指數、足長、足寬等各種參數量測出來。此外本研究開發之量測系統可將量測出之資料保存起來,建立使用者資料庫,以便長期追蹤使用者之健康狀況,達到預防足部疾病的重要目的。 The Plantar pressure and arch index of patient for pathological analysis is an important issue in biomechanical field. The results can be used for preventing and treating some diseases like diabetes and paralysis. There were some used plantar pressure measurement methods in clinical research. Harris foot mat use rubber cushion to measure subject’s plantar pressure. Another method adopted electrical pressure sensors to measure the plantar pressure through the changes of electrical resistance and capacitance. In addition, optical system used photo or plastic sensing units to measure plantar pressure. Although the cost of optical measurement system was cheaper than the electric system, the capability of optical system for measuring pressure values performed worse than electric ones. Besides, the present optical system needs auxiliary structure to measure plantar pressure. This study tried to use gray level analysis to build a new system to improve the defect of measuring pressure values, and simplify process of system. This work develops a new optical plantar pressure and arch index measurement system. Instead of the existing photo or plastic sensing units, the present system uses digital optical camera to capture the color change of bare foot standing. Use gray level transformation and image-processing techniques to establish a correlation relation between the plantar pressure and gray level. Furthermore, measuring the divided region surface of foot can easily get arch index. We can measure the pressure distribution, arch index, length, and width of foot through our system. The simple composition of system and interface can help operators to get plantar information of users more convenient than other used methods. Besides, the data measured by this system can be conserved though data base of users and could be applied for foot disease prevention in the future. |
URI: | http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/53593 |
全文授權: | 有償授權 |
顯示於系所單位: | 應用力學研究所 |
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