基于模糊控制的叶绿素荧光参数检测系统设计

发布时间：2017-12-26 16:32

本文关键词：基于模糊控制的叶绿素荧光参数检测系统设计　出处：《沈阳农业大学》2017年硕士论文　论文类型：学位论文

【摘要】：光合作用是绿色植物获取能量的重要途径,而叶绿素荧光可以作为植物光合作用的探针,设计了一套叶绿素荧光在线检测系统。通过MINI-PAM荧光仪可以实时检测到植物叶绿素的荧光参数,并通过LED光源辐射植物使植物生长在不同的光照条件下,测量了植物在不同条件下的荧光参数以及快速光响应曲线,为研究不同的环境因子对植物光合作用的影响,因此,设计了一套智能检测控制系统用来实现对植物叶绿素荧光参数的检测。本文首先介绍了叶绿素荧光参数检测系统设计课题研究的背景,目的和意义。介绍了目前国内外检测叶绿素荧光参数的方法以及不足之处。通过设计一套智能检测控制系统来检测叶绿素荧光参数,在检测系统的硬件设计部分,首先介绍了检测系统总体设计思想,通过对环境因子检测模块的硬件原理图设计,传感器和主芯片的选择、液晶显示模块的硬件原理图设计以及键盘输入模块和Zigbee模块硬件原理图的设计,完成了对叶绿素荧光参数检测系统的硬件原理设计。通过对各个部分硬件原理图的设计,完成了对叶绿素荧光参数检测系统基本框架的构建。接下来介绍了叶绿素荧光参数检测系统的软件设计部分,通过叶绿素荧光参数检测系统的软件设计,在系统硬件设计的基础上可以实现对叶绿素荧光参数检测系统的环境因子的检测和叶绿素荧光参数的检测,控制部分采用数学中的模糊控制算法,通过对模糊控制器的设计,输入量和输出量的模糊化处理,模糊规则的制定,完成了对模糊控制系统的设计与实现,最后,通过Matlab模拟软件中的Simulink仿真模块,对模糊控制系统进行了模拟仿真,通过观测输入一个阶跃信号,观察仿真系统的响应能力,判断系统的稳定性能。最后,通过上位机系统采集叶绿素荧光参数检测系统的环境因子数据,检测系统的性能,保持温度,湿度和C02浓度环境因子的大小相对恒定,通过改变可编程控制电流源的大小改变植物所处环境的光照强度,研究在不同光照强度下的植物的叶绿素荧光参数随光照强度的不同而受到的影响。通过本课题设计的叶绿素荧光参数检测系统,可以实现对叶绿素荧光参数检测系统环境因子的自动监测控制,存储,显示。同时能提供各环境因子的历史记录和数据。试验结果运行表明:该智能监控系统运行稳定,测量结果准确可靠,可以满足控制要求,在研究植物光合作用上有良好的应用前景。
[Abstract]:Photosynthesis is an important way for green plants to get energy. Chlorophyll fluorescence can be used as a probe for plant photosynthesis, and a set of chlorophyll fluorescence online detection system is designed. The MINI-PAM fluorescence spectrometer can be detected in real time to plant chlorophyll fluorescence parameters, and through the LED light source radiation plant makes plants grow in different light conditions, measured the fluorescence parameters of the plant under different conditions and the rapid light response curve, as the effects of different environmental factors, research on plant photosynthesis and therefore designed a intelligent detection and control system to realize the detection of chlorophyll fluorescence parameters of plants. In this paper, the background, purpose and significance of the research on the design of chlorophyll fluorescence parameter detection system are introduced. The methods and inadequacies of the detection of chlorophyll fluorescence parameters at home and abroad are introduced. By designing a set of intelligent detection and control system to detect the chlorophyll fluorescence parameters, in the part of the hardware design of detection system, first introduced the detection system design, through the design of hardware principle diagram of detection module, environmental factors, sensor and the main chip selection, hardware design principle of liquid crystal display module and keyboard input module and design the Zigbee module hardware principle diagram, completed the hardware design principle of detection system of chlorophyll fluorescence parameters. Through the design of the hardware schematic of each part, the construction of the basic framework of the chlorophyll fluorescence parameter detection system is completed. The next part introduces the software design of detection system of chlorophyll fluorescence parameters, through the software design of detection system of the parameters of chlorophyll fluorescence detection, on the basis of the hardware design can be achieved on the environmental factor detection system of chlorophyll fluorescence parameters and chlorophyll fluorescence detection parameters, the control part adopts fuzzy control algorithm based on fuzzy design controller, fuzzy processing of input and output of the fuzzy rules, the completion of the design and implementation of fuzzy control system, finally, through the Matlab simulation module of Simulink simulation software, the fuzzy control system simulation, by observing the input of a step signal, observe the response ability of simulation system the stability judgment system. Finally, through the data acquisition system to detect environmental factors of chlorophyll fluorescence parameters of the host computer system, performance detection system to maintain the temperature, humidity and C02 concentration of environmental factors in size is relatively constant, by changing the programmable current source size changing plant environment light intensity, influence on chlorophyll fluorescence parameters in different light the strength of plants with light intensity are different. Through the design of chlorophyll fluorescence parameter detection system, we can realize the automatic monitoring, control, storage and display of environmental factors of chlorophyll fluorescence parameter detection system. At the same time, it can provide historical records and data of various environmental factors. The operation of the test results shows that the intelligent monitoring system is stable, accurate and reliable, and can meet the control requirements. It has a good application prospect in the study of plant photosynthesis.
【学位授予单位】：沈阳农业大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TP273.4;TP274;Q945.11

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