Developmenat of measuring system for physiomechanics micromodel parameters of vegetative tissue

本研究的目的是开发一种能够测量植物组织生理力学微观模型参数（杨氏模量、泊松比、水势效应系数）的测量系统。该测量系统由三个主要系统组成：1）计算机控制的单轴压缩装置系统，用于处理显微尺寸的植物组织样品; 2）图像处理系统，用于采集组织样品变形的图像数据;本文还介绍了一个重要的系统--组织水势控制系统，它的主要部分是一个计算机控制的PEG溶液注射装置。本文的阅读结果和进展如下：1.在微型计算机上实现了卡尔曼滤波有限元逆分析。有限元逆分析程序可处理二维轴对称弹性问题。2.用下列方法检验了本系统的性能1）用已知杨氏模量和泊松比的合成橡胶对所研制的测量系统的可靠性进行了检验利用Lesar位移测量装置对马铃薯组织水势效应系数进行了直接测量4.以辣椒、马铃薯、成熟番茄、莲藕、香菇、洋葱、黄瓜等7种蔬菜为试验材料，测定了其相关参数。传统的测试方法由于其麻烦的处理性质而不能处理这些产品。

The objective of this research project is to develop a mesuring system which is capable of measuring the physiomechanics micromodel parameters (Young's modulus, poisson's ratio, water potential effect coefficients) of vegetative tissue. The measuring system consists of three major systems :1) computer controlled uniaxial compres-sion device systemwhich can handle microscopic size samples of vegetative tissue, 2) image processing system used for image data samplingfor tissue sample deformation,3) numerical data processing system to estimate physiomecha-nics parameters. An additionalImportant system is a tissue water potential level control system of which main part is a computer controled PEG solution injection device.The followings are reading findings and developments in this project.1.A Kalman filter finite element inverse analysis is implemented on a microcomputer.The FEM inverse program can handle 2 dimentional axisymmetric elasticity problems.2.The following methods were used to inspect the performance of this developed measuring system.1) A synthetic rubber of which Young's modulus and Poisson's ratio were known was used to test the reliabi-lity of estimation system of the developed system.2) Lesar displacement measuring device were used to perform a direct mesurement of water potential effect coefficient using potato tissue.3.The sufficient reliability of the developed measuring system was substaitiated by the inspection tests.4.The parameters were determined with seven different kinds of vegetables (Peper, Potato, ripe tomato, lotus, mushroom, onion, cucumber) . the conventional testing method has not been able to handle those products due to their trouble handling nature.