香梨果肉穿刺力响应谱的峰值法分析及脆度评价  

Crispness evaluation of Korla pear flesh in puncture by peak analysis of force response spectrum

作　　者：余丽娟 吴杰[1] 马宏强[1] 王佳萍 Yu Lijuan;Wu Jie;Ma Hongqiang;Wang Jiaping(College of Machinery and Electricity Engineering,Shihezi University,Shihezi,Xinjiang 832000,China;Xinjiang Shihezi Vocational Technical College,Shihezi,Xinjiang 832000,China)

机构地区：[1]石河子大学机械电气工程学院,新疆石河子832000 [2]新疆石河子职业技术学院,新疆石河子832000

出　　处：《石河子大学学报（自然科学版）》2019年第1期87-92,共6页Journal of Shihezi University(Natural Science)

基　　金：国家自然科学基金项目(31860466)

摘　　要：为解决香梨脆度客观准确评价这一问题,本研究采用峰值法对不同成熟度香梨果肉穿刺力-变形曲线的锯齿度进行度量分析,分别提取计算得到了10个峰值参数,并对这10个参数随香梨贮藏时间的变化规律以及对香梨果肉脆度变化的敏感度进行分析,结果表明:香梨脆度随贮藏时间逐渐减小时,有7个峰值参数变化有规律,其中曲线下面积S、平均峰值Fmean、最大峰值力Fmax、曲线线性长度D呈明显减小趋势,总峰数n、曲线长度比D/DS、Heidenreich指数Cn呈明显升高趋势。因此,曲线线性长度D、总峰数n、曲线长度比D/DS、Heidenreich指数Cn这4个峰值参数适于作为香梨脆度评价指标,Heidenreich指数Cn对香梨脆度变化最敏感,具有最优的香梨果肉脆度评价能力。In order to solve the problem that it is difficult to evaluate the crispness of Korla pear objectively and accurately.The peak analysis method was used in this study to measure the jaggedness of force-deformation curve of Korla pear in puncture.We analyzed the changes and the sensitivity of ten peak parameters obtained from force-deform curve with the change of crispness of Korla pear flesh.The results showed that seven peak parameters changed regularly when the crispness of Korla pear decreased with storage time.The area under the curve,the average puncture force,the maximum puncture force and the linear distance of the actual curve decreased while the total number of peaks,the ratio of the linear distance of the actual curve to the linear distance of the smoothed curve,the Heidenreich index Cn increased obviously.Four peak parameters including the linear distance of the actual curve,the total number of peaks,the ratio of the linear distance of the actual curve to the linear distance of the smoothed curve,the Heidenreich index Cn are suitable for evaluating the crispness of Korla pear.The Heidenreich index Cn is most sensitive to the change of crispness of pear flesh,so it has the best ability to crispness evaluation for Korla pear flesh.

关 键 词：库尔勒香梨 力-变形曲线 锯齿度 峰值分析 脆度 

分 类 号：TS255.1[轻工技术与工程—农产品加工及贮藏工程]