西瓜内部透射光传播模型的建立

Establishment of light transmitting model of watermelon

中文关键词:  西瓜  透射光  近红外光谱测定法

英文关键词:watermelon  transmittance light  near-infrared spectrometry

中文摘要:

      目的 建立光在西瓜内部传播的模型。方法 采用长与宽均为100 mm的西瓜样本块, 测量西瓜样本不同高度的光谱, 对光谱值进行积分后得到照度值, 用照度值建立符合平方反比定律的回归模型。结果 样本的照度值与回归模型预测得到的照度值相关系数均在0.89以上。结论 西瓜样本内部光的衰减波段主要集中在720~820 nm之间; 点光源照射西瓜样本时, 光在西瓜内部的光传播符合平方反比定律。

英文摘要:

      Objective To estalish a light transmitting model of watermelon. Methods The watermelon sample was shaped as a block, with both length and width of 100 mm. And the spectrum values were detected for different heights of samples. The luminous flux values were integrated by spectrum values, so as to set up a regression model in line with the inverse square law. Results The correlation coefficient values between the luminous flux value calculated with the regression model and the test value were all above 0.89. Conclusion The wavelength of spectrum value of the same sample in varied heights is between 720~820 nm. The propagation model of transmittance light in watermelon samples lighted by a point light source is in line with the inverse square law.