梨的下落碰撞冲击加速度特性研究  

Mechanical parameters of impact occurred due to fruit fall in relation to bruise suffered by fruit

作　　者：陈善锋[1] 周亦斌[2] 王俊[2] 王剑平[2] 

机构地区：[1]山东工程学院农业工程系,山东淄博255012 [2]浙江大学生物系统工程系,浙江杭州310029

出　　处：《浙江大学学报（农业与生命科学版）》2003年第3期339-342,共4页Journal of Zhejiang University:Agriculture and Life Sciences

基　　金：国家自然科学基金(30170533);浙江省自然科学基金资助项目(300296).

摘　　要：农产品在收获、分级、包装及运输和加工中容易发生机械损伤,其中碰撞是导致机械损伤的主要原因之一.本文以黄花梨为试验对象,进行了不同下落高度、不同梨质量和坚实度等对碰撞参数指标如加速度峰值、到达加速度峰值时间、碰撞总时间、加速度峰值/到达峰值时间的比值等影响的碰撞特性试验.结果表明3个试验因子对加速度峰值/到达峰值时间的比值、损伤体积和加速度峰值的影响均为显著(坚实度对加速度峰值影响为不显著).碰撞参数指标内部之间的相关性不尽相同,其中加速度与损伤体积间相关性最大、到达峰值时间与损伤体积相关性最小.Bruises frequently occur during harvesting, handling, grading, and transporting. The conditions necessary for pear to be endowed with the ability to reduce or avoid bruises due to mechanical impact remain unknow. It would be useful to know the frequency and severity of bruise occurrence on pear fruit as a function of drop height, mass and firmness of fruit. So the effects of these factors on bruise volume and various impact parameters (contact time, time to peak acceleration, peak acceleration, the ratio of peak acceleration to time to peak acceleration) were determined for pear. Most of the impact parameters changed with drop height, mass, firmness of fruit.

关 键 词：梨 碰撞特性 加速度 机械损伤 碰撞参数指标 果实品质 

分 类 号：S661.2[农业科学—果树学]