【摘要】：智慧農(nóng)業(yè)能夠高效利用農(nóng)業(yè)資源、大幅度降低農(nóng)業(yè)生產(chǎn)成本和能耗,是一種高效、低耗、優(yōu)質的新型農(nóng)業(yè)發(fā)展模式�，F(xiàn)有的智慧農(nóng)業(yè)軟件系統(tǒng)存在系統(tǒng)功能單一,數(shù)據(jù)資源分散、共享率低等問題。基于傳感器技術、物聯(lián)網(wǎng)技術、計算機網(wǎng)絡技術構建的智慧農(nóng)業(yè)服務平臺實現(xiàn)了農(nóng)業(yè)數(shù)據(jù)采集和設備控制,并依靠網(wǎng)絡架構實現(xiàn)高效服務部署和數(shù)據(jù)共享,同時避免了軟件重復開發(fā)造成的成本浪費,對推進農(nóng)業(yè)信息化發(fā)展有重要意義。論文主要做了以下幾方面的工作：1.提出了一種通用性的服務器平臺。針對智慧農(nóng)業(yè)應用系統(tǒng)缺乏通用服務器架構,軟件重復開發(fā)和數(shù)據(jù)資源浪費的問題,本文設計了基于LNMP的通用服務器平臺架構,降低界面呈現(xiàn)、服務流程控制及數(shù)據(jù)處理的耦合度,利用面向對象思想簡化數(shù)據(jù)庫設計的復雜度,提高服務器開發(fā)效率,實現(xiàn)各類應用服務的快速部署。2.提出了一種提高通用服務器平臺數(shù)據(jù)傳輸安全性的優(yōu)化方案。針對網(wǎng)絡數(shù)據(jù)傳輸和服務器系統(tǒng)的安全性問題,本文提出的系統(tǒng)實現(xiàn)方案利用RS485總線對服務器和采集控制系統(tǒng)進行隔離,使二者的安全性解耦；并利用SSL協(xié)議服務器與采集控制系統(tǒng)間的信息安全加密傳輸,防止攻擊者對數(shù)據(jù)竊取篡改。3.提出了一種提高通用服務器平臺并發(fā)處理能力的優(yōu)化方案。針對服務器平臺業(yè)務處理效率和并發(fā)處理能力的瓶頸問題,本文對SSL安全套接字進行了非阻塞I/O復用擴展,并提出一種基于多維隊列的任務處理策略,實現(xiàn)了子任務并行處理,減少任務處理線程數(shù),提高服務器的并發(fā)性和響應速度。4.完成業(yè)務部署,并進行方案驗證。在通用服務器平臺基礎上,實現(xiàn)了農(nóng)田灌溉遠程監(jiān)控服務和作物生長環(huán)境監(jiān)測服務的快速部署,并通過測試驗證了本文提出的服務器架構、安全性優(yōu)化方案和并發(fā)性優(yōu)化策略的正確性、有效性。研究結果表明,本文提出的基于LNMP的通用服務器架構具有較高的并發(fā)處理能力,且易于程序開發(fā)和服務部署；基于485總線隔離和SSL加密通信的系統(tǒng)實現(xiàn)方案有效保障了服務器安全；對SSL安全套接字的非阻塞I/0復用擴展和基于多維隊列的并行任務發(fā)布策略,有效提高了服務器并發(fā)能力。
[Abstract]:Intelligent agriculture can utilize agricultural resources efficiently and reduce agricultural production cost and energy consumption by a large margin. It is a new agricultural development mode with high efficiency, low consumption and high quality. The existing intelligent agricultural software system has some problems, such as single system function, scattered data resources and low sharing rate. The intelligent agricultural service platform based on sensor technology, Internet of things technology and computer network technology realizes agricultural data acquisition and equipment control, and relies on network architecture to realize efficient service deployment and data sharing. At the same time, the cost waste caused by repeated development of software is avoided, and it is of great significance to promote the development of agricultural informatization. The main work of this paper is as follows: 1. A universal server platform is proposed. In view of the lack of common server architecture, repeated development of software and waste of data resources in intelligent agricultural application systems, a general server platform architecture based on LNMP is designed in this paper to reduce interface presentation. The coupling degree of service flow control and data processing, using object-oriented thought to simplify the complexity of database design, improve the efficiency of server development, and realize the rapid deployment of all kinds of application services. 2. This paper presents an optimized scheme to improve the security of data transmission in general server platform. Aiming at the problem of network data transmission and the security of server system, the system implementation scheme in this paper uses RS485 bus to isolate the server and the acquisition control system, so that the security of the two systems can be decoupled. And the SSL protocol server and the acquisition control system between the information security encryption transmission, to prevent attackers from stealing and tampering with data. 3. 3. This paper presents an optimization scheme to improve the concurrency processing capability of the common server platform. Aiming at the bottleneck of service processing efficiency and concurrent processing ability of server platform, this paper extends the SSL secure socket with non-blocking I / O multiplexing, and proposes a task processing strategy based on multidimensional queue. The parallel processing of subtasks is realized, the number of task processing threads is reduced, and the concurrency and response speed of the server are improved. 4. 4. Complete business deployment and program validation. On the basis of common server platform, the rapid deployment of remote monitoring service for farmland irrigation and monitoring service for crop growth environment is realized, and the server architecture proposed in this paper is verified by testing. The correctness and effectiveness of security optimization scheme and concurrency optimization strategy. The research results show that the proposed universal server architecture based on LNMP has high concurrency processing capability and is easy to program development and service deployment. The system implementation scheme based on 485 bus isolation and SSL encryption communication effectively ensures the security of the server. Non-blocking I / O multiplexing extension for SSL secure sockets and parallel task publishing strategy based on multidimensional queue can effectively improve server concurrency capability.
【學位授予單位】：浙江大學
【學位級別】：碩士
【學位授予年份】：2015
【分類號】：S126;TP311.52

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