光學三角量測於中醫脈搏的應用

高典佑(Tian-Yu Kao)

指導教授 ： 張榮森

國立中央大學/理學院/光電科學研究所/碩士(2006年)

摘要

中醫把脈是以經驗的傳承、古書的意會以及個人長期經驗的累積，才能隱約把出病灶，其方法頗不科學，不像西醫有數據佐證作為判斷依據，如能以科學儀器將中醫脈搏科學化量化，如此便可更容易去探討脈搏脈象所表的身體狀況訊號。
本論文採用非接觸式的光學三角量測，利用SRD光源聚焦在皮膚上，接著透過CMOS影像感測器擷取跳動影像，再利用軟體分析光點的移動，推測出脈搏振幅跟頻率，本架構是改良了先前以雷射為光源的系統，使用SRD光源改良了雷射投射在皮膚上成像過大(251 112pixels)及光斑效應，造成在量測脈搏上的誤差，並用一參考光打在橈骨的位置，當作手的晃動，再取打在脈搏上光點的位移減掉此參考點，如此更逼近脈搏的跳動，改善了手晃動造成的誤差。
實驗架構經校準後，可解析到7μm。以及本論文測了三個主題：抽煙前後、吃辣前後、飯前飯後，分析出數據再透過統計方法做P值檢定，其得到結果各別如下：抽菸後左關振幅變大；吃辣後右寸振幅變大；吃飯後右關頻變大且振幅變大，左寸頻率變大。
抽煙前後、吃辣前後及吃飯前後量測，主要是提出數據感，有別於中醫把脈只能觸診憑感覺描述，無法定量的觀察，當然得在量更多的樣本，這樣數據描述會更詳實。

關鍵字

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並列摘要

In Chinese medicine, the doctor feels the pulse to judge patients'' condition. They learn the technique by teacher’s describing and book and himself experience. They didn’t have the data to describe patients'' condition. It will be studied easily if the pulse be quantification.
We use no contact optical triangular measurement. The setup use SRD (Super Radiance Diode) for light source. And the light received by CMOS image sensor. Then we use MATLAB and Origin to analyze data. We finally get the amplitude and spectrum. The light was laser previously. Here, we use SRD to replace laser. Then the image on the skin will be small (251 112pixels). The light is so small that scattering effect will be weak. And we remove hand’s shake by a technique which is projecting another light to radius. So we can take the second light be a displacement which is hand’s shake. Take the original light data subtract from the second light data. So we can neglect hand’s shake. The result will approach true pulse.
After adjusting, resolution of experiment setup is 7μm. And we test three kind of stimulus subjects: smoking, spice and eating. We take statistics’ method P value to test the three conditions. Then the amplitude which is the position Guan of left hand is getting strong after smoking. The amplitude which is the position Cun of right hand is getting strong after eating peppery food. The amplitude and frequency are getting strong on Guan of right hand after eating. And the frequency is getting strong after eating.
In above three subject, it provide for sense of data that we can know how much amplitude is. But the number maybe can’t represent what Chinese medicine says. It need more sample to compile data to compare with Chinese medicine.

並列關鍵字

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參考文獻

[1] Warren J. Smith, “Modern Optical Engineering”, 1784, p227~p230.

[3] Jean Pierre Fillard, “Subpixel Accuracy Location Estimation from Digital Signals”Optical Engineering, November 1992, Vol. 31, No.11/2465.

[2] Brian F. Alexander, “Elimination of Systematic Error in Subpixel Accuracy

Centroid Estimation”, Optical Engineering, September 1991, Vol.30 No.9.

[4] 賴鐵軍，郭祝武著， “應用統計學”， 全華科技。