香蕉是我国岭南四大水果之一.doc

香蕉是我国岭南四大水果之一，其果皮和肉质娇嫩，在采摘后的多个环节会受到各类机械损伤而导致香蕉果皮褐变和果肉变质。香蕉生物力学特别是机械损伤研究可以规避香蕉采摘、贮藏、运输等环节因为机械损伤而造成的品质下降，保持香蕉果皮美观亮泽，提高香蕉价格和延长销售周期。 本文主要探讨香蕉受机械损伤后，果皮和果肉的症状表现以及制定相关测定方法，开展了以下工作：首先查阅了相关文献,了解香蕉果实生物力学以及机械损伤方面的资料，总结本次研究要需要注意的问题，并在讨论当中得出解决的方法。根据现有的相关水果特别是香蕉的机械损伤以及生物力学的研究和理论进行分析。初步探讨了可用于香蕉损伤力学的模拟方案、香蕉损伤的测试手段和相关分析手段。选用本地香蕉作为试验对象，对探讨方案进行试验，证实了试验的可行性和有效性。选用可行方案进行试验，使用WD-20KE精密型微控电子式万能试验机进行了力学模拟，进行了点加载和面加载两个系列的力学模拟。使用GY-1水果硬度计测试了香蕉受损后硬度值变化，得出了硬度值与加载压力及随放置时间关系式；使用CR-10色差仪测试了香蕉果皮和果肉受损后色泽褐变程度，总结了加载压力对完熟香蕉果皮不起显著影响，加载压力与放置时间对果肉有明显的损伤变化；使用DDS-307电导率仪测试香蕉果肉损伤后电导率的变化，解析了香蕉果肉组织与机械损伤以及放置时间存在线性相关关系。总结了香蕉机械损伤的果皮果肉变化规律以及进行回归分析，通过物理力学等试验手段结合生物力学、生物细胞学和化学变化等分析香蕉受损后的变化，最后整集成论文形式。本论文作为一个探讨性的方案，综合硬度、色差、电导率对香蕉的品质评价，为后续的关于香蕉机械手、贮运设备和生产设备等设计提供数据支持和试验设计支持，对推动水果机械化特别是香蕉机械化生产进程有一定价值。Abstract：Banana is one of the South Chinas four famous fruits. Post-harvest banana is very tender in peel and pulp. During the picking process, the use of machine would easily result in speckle and deterioration. Therefore, researches and study in mechanical damage contribute to maintaining value and lengthen the sales period by avoid the damage in quality and appearing during the mechanical storing and delivering. This paper mainly focuses on discussing the symptoms of mechanical damage and different testing methods. The following major tasks: First of all, access to the literature and experiment records, fond which reference sources on mechanical damage of banana and biomechanics are provided. Whats more analysis of relevant cases in fruits mechanical damage and applicable theories in biomechanical turn out to be an essential part of this paper. With great concerned, the problems and final solution will be also presented in the paper. Preliminary study can be used to simulate damage mechanics program banana, banana injury means test, correlation analysis tools. Local bananas are chosen as target in primary study test to prove the feasibility and effectiveness. Selected options, including the WD-20KE universal mechanical testing machine, the GY-1 Hardness meter, the CR-10 Color set to color difference and the DDS-307 electro-conductibility set, are applied to the tests and results are respectively turning out to be a mechanical model in point and plane series, a comparison expression with hardness, time and pressure, an independence between pressure and the ripe peel, and a linear relation involved with pulp tissue, mechanical damage and time. The test data analysis, summarize the impact of the law banana mechanical damage and to calculate its return element equation, by means of combination of physical and mechanical tests such as biomechanics, cellular and other biological changes in the microstructure and chemical analysis of the changes damaged the banana to provide scientific reference, as a comprehensive exploratory program hardness, color, conductivity evaluation of the quality of banana for banan