Developmenat of measuring system for physiomechanics micromodel parameters of vegetative tissue

本课题的研究目标是开发一种能够测量植物组织的物理力学微模型参数（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，可以处理微观尺寸的植物组织样本；2)图像处理系统，用于组织样本变形的图像数据采样；3)数值数据处理系统，用于估计物理力学参数。另一个重要的系统是组织水势液位控制系统，其主要部分是计算机控制的聚乙二醇溶液注射装置。以下是该项目的阅读发现和发展。在微机上实现了卡尔曼滤波有限元逆分析。有限元反求程序可以处理二维轴对称弹性问题。采用以下方法对所开发的测量系统的性能进行了检验。1)利用已知杨氏模量和泊松比的合成橡胶，对所开发的系统估计系统的可靠性进行了检验。2)采用Lesar位移测量装置，利用马铃薯组织直接测量水势效应系数。检验试验证实了所研制的测量系统具有足够的可靠性。以7种蔬菜（辣椒、马铃薯、熟番茄、荷花、香菇、洋葱、黄瓜）为实验对象，对其进行了参数测定。由于这些产品难以处理，传统的测试方法已经无法处理。

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.