植物工厂营养液多参数在线检测与同步传输终端

发布时间：2018-03-17 23:32

本文选题：在线检测　切入点：同步传输　出处：《西北农林科技大学》2014年硕士论文　论文类型：学位论文

【摘要】：在植物工厂中生长的作物，其根系大多数生长在营养液中，由于吸收了营养液中的氧气、养分和水分，使营养液的pH、溶解氧含量、浓度等参数持续改变。另外，各种微生物、少量衰老脱落的残根以及根系分泌的有机物等都会影响营养液的参数。因此，必须对植物工厂营养液各参数进行实时的检测，然后予以控制，使其处于符合作物生长发育需要的状态。植物工厂的核心技术包括营养液的在线检测和环境的综合控制两方面技术。其中，为实现植物工厂连年正常生产的目的，营养液在线检测是必不可少的。植物工厂营养液在线检测技术即利用多种传感器和计算机对作物生长发育所需的含盐量、电导率、温度、pH值等根际环境因子进行在线检测，从而实现对植物工厂营养液的全程监控。关于植物工厂营养液多参数在线检测与同步传输终端的研究，即运用现有的科学技术条件，实时、准确地检测植物工厂营养液中根际环境因子的参数，参考作物生长不同时期所需营养液各参数值，为营养液的调控提供支持。植物工厂营养液检测系统是植物工厂的重要组成部分，是实现植物工厂智能综合自动化的基础，研究低成本、高精度的植物工厂营养液多参数在线检测系统具有重要的意义。本研究采用“分散检测、集中处理、协调控制”的模式，通过模块化的设计方法把整个系统划分为传感器模块、信号调理模块、微处理器模块和通信模块四大部分，分步实现。将数据采集技术、AVR单片机技术、无线通信技术等应用于植物工厂营养液多参数在线检测与同步传输系统上，采用理论分析和实验相结合的方法进行系统的软硬件设计和调试验证，开发为植物工厂服务的营养液多参数在线检测与同步传输终端。最终开发一个以数据采集技术、AVR单片机技术和无线通信技术为基础的植物工厂营养液多参数在线检测与同步传输终端，，能实时采集营养液的温度、酸碱度pH值、电导率EC以及溶解氧浓度DO，并通过无线通信完成实时数据的传输、存储等工作，使其具有实时检测、同步传输、稳定可靠的特点。
[Abstract]:Most of the roots of crops grown in plant factories are grown in nutrient solutions. By absorbing oxygen, nutrients and water from the nutrient solution, the pH, dissolved oxygen content, concentration and other parameters of the nutrient solution continue to change. In addition, a variety of microorganisms, A small amount of senescence and shedding residual roots and organic matter secreted by roots all affect the parameters of nutrient solution. Therefore, the parameters of nutrient solution in plant factory must be detected in real time and then controlled. Put it in a state that meets the needs of crop growth and development. The core technology of plant factory includes two aspects: on-line detection of nutrient solution and integrated control of environment. On-line detection of nutrient solution is essential. Plant plant nutrient solution on-line detection technology uses a variety of sensors and computers to detect the environmental factors of the rhizosphere such as salt content, electrical conductivity, temperature and pH value for crop growth and development on line. Thus, the whole process monitoring of nutrient solution in plant factory can be realized. The research on the on-line detection and synchronous transmission terminal of nutrient liquid in plant factory, that is, using the existing scientific and technological conditions, to detect the parameters of the rhizosphere environmental factor in the nutrient liquid of plant factory in real time and accurately. In order to provide support for the regulation and control of nutrient solution, the nutrient liquid detection system of plant factory is an important part of plant factory and the basis of realizing intelligent automation of plant factory, referring to the parameters of nutrient solution needed in different periods of crop growth. It is of great significance to study the low-cost and high-precision plant nutrient liquid multi-parameter online detection system. In this study, the system is divided into four parts: sensor module, signal conditioning module, microprocessor module and communication module. Data acquisition technology AVR single chip computer technology, wireless communication technology and so on are applied to the plant plant nutrition liquid multi-parameter on-line detection and synchronous transmission system. The software and hardware of the system are designed and debugged by combining theoretical analysis and experiment, and the multi-parameter on-line detection and synchronous transmission terminal of nutrient solution serving for plant factory is developed. Finally, a plant plant nutrient liquid on-line detection and synchronous transmission terminal based on AVR single chip computer technology and wireless communication technology is developed, which can collect the temperature and pH value of nutrient liquid in real time. Electrical conductivity EC and do of dissolved oxygen concentration can be used to transmit and store real time data through wireless communication so that it has the characteristics of real time detection synchronous transmission and stability and reliability.
【学位授予单位】：西北农林科技大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：S316;TN92

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