基于驻波率原理的植物茎体水分无损检测方法研究  

Non-destructive Measurement of Plant Stem Water Content Based on Standing Wave Ratio

作　　者：赵燕东[1,2] 高超[1,2] 张新[1,2] 徐强[3] 

机构地区：[1]北京林业大学工学院,北京100083 [2]北京林业大学城乡生态环境北京实验室,北京100083 [3]北京林业大学林学院,北京100083

出　　处：《农业机械学报》2016年第1期310-316,共7页Transactions of the Chinese Society for Agricultural Machinery

基　　金：国家自然科学基金项目(31371537);北京市共建项目;林业公益性行业科研专项重大项目(201404401)

摘　　要：水在植物的各项生理活动中起着至关重要的作用,实时无损检测植物茎体的水分对研究植物的生命活动有着重要的指导意义。本文提出了一种基于驻波率原理的茎体水分实时无损在线检测方法,并设计了BD-IV型植物茎体水分传感器,分别在以有机溶剂及烧杯为实验材料的仿真环境、以松树为实验材料的树段环境及以桃树为实验材料的活立木实验环境下,验证了BD-IV型植物茎体水分传感器的检测性能。当植物茎体直径在5.0-10.5 cm之间且体积含水率在1.17%-59.59%之间时,BD-IV型植物茎体水分传感器能准确地检测出植物茎体的体积含水率。通过长期监测桃树茎体水分的日变化和月变化情况,得知BD-IV型植物茎体水分传感器的检测结果与植物生理特性相符;与德国生产的SF-L型树干茎流仪同时监测柳树的茎体水分和茎流,得出茎体水分和茎流之间的关系,为植物生理特性研究提供了一种高性能价格比的国产化检测仪器。Water plays an important role in various physiological activities of plants. Measuring plant stem water content in real time without damage has important guiding significance for studying the life activities of plants. A kind of stem water content of real-time and non-damage online detection method based on standing wave ratio was introduced in detail. BD-IV stem water content sensor was designed based on the method. With organic solvents and the beakers as the simulation environment,pine as the experimental materials of the section of tree,and peach as experimental materials of standing tree,the detection performance of BD-IV stem water content sensor was verified. BD-IV stem water content sensor can accurately detect volume water content under the conditions of plant stem diameter between 5. 0 cm and 10. 5 cm,volume water content between 1. 17% and 59. 59%. Through the long-term monitoring of daily and monthly changing rule of stem water content of peach,the result measured by BD-IV stem water content sensor was consistent with plant physiological characteristics. Through the long-term monitoring of stem water content and stem sap flow of willow by using BD-IV stem water content sensor and SF-L stem flow gauge made in Germany,the relationship between stem water content and stem sap flow was summarized. It provides a localization testing instruments with high performance to price ratio for the research on plant physiological characteristics.

关 键 词：茎体水分 驻波率 无损检测 茎流 

分 类 号：TP212[自动化与计算机技术—检测技术与自动化装置] S715.2[自动化与计算机技术—控制科学与工程]