Developmenat of measuring system for physiomechanics micromodel parameters of vegetative tissue

本研究项目的目的是开发一种能够测量营养组织的物理力学微观模型参数(杨氏模数、泊松比、水势影响系数)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，用于处理植物组织的微观尺寸样品；2)图像处理系统，用于组织样品变形的图像数据采集；3)数字数据处理系统，用于估计物理机械参数。一个重要的附加系统是以计算机控制的聚乙二醇水溶液注射装置为主体的组织水势控制系统。以下是本项目的研究成果和进展。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以处理二维轴对称弹性问题。2)用下列方法检验了所开发的测量系统的性能：1)用已知杨氏弹性模量和泊松比的合成橡胶来测试所开发系统的估计系统的可靠性利用马铃薯组织进行水势效应系数的直接测量。3.通过检测试验验证了所开发的测量系统的足够可靠性。4.以7种不同的蔬菜(辣椒、土豆、成熟西红柿、莲花、蘑菇、洋葱、黄瓜)。由于这些产品的故障处理性质，传统的测试方法已经无法处理这些产品。

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.