通过采用Matlab数字图像技术计算胡萝卜表面积收缩率,研究了其干燥特性,进而利用万能试验机对胡萝卜片的物理机械特性进行分析。以不同的切片厚度、切片方式、含水率、粉碎量和粉碎时间为试验因素,以通过80目标准筛质量比为试验指标,试验研究胡萝卜高速剪切粉碎工艺参数,通过单因素试验、正交试验和极差优化分析,并用Matlab中stepwise逐步回归建立数学模型与优化,确定胡萝卜采用高速剪切粉碎工艺参数为:切片方式为径向、切片厚度为3 mm、含水率为5%、粉碎时间为3.5 min时,胡萝卜切片干燥粉碎后通过标准80目筛的质量比最高。

Matlab digital image technology is used to calculate the shrinkage ratio of carrot surface area. After studying the drying properties,the universal test machine is used to analyze the physical and mechanical characteristics of carrot slices to provide the basis for high speed shear smashing technology. The thickness of carrots slice,cutting method,moisture content,crushing amount and crushing time are designed as testing factors and the passing rate of 80 meshes sieve is the test indicator. With the help of Single factor test,orthogonal tests,range optimization,the stepwise regression mathematical model and optimization generated from the stepwise function in Matlab,the best technology parameters are confirmed as: radial cutting,3 mm's thickness,5% 's moisture content,smashing time3. 5 min,the carrot slices have the highest rate to go through 80 meshes sieve.