臺灣博碩士論文加值系統

本論文為針對廢水處理設備，結合Java及其原生介面 (Java Native Interface, JNI) 技術、開放式控制器架構與RTLinux作業系統而建立一開放式監控系統平台，以期縮短輸出與輸入模組的反應時間，提高系統性能與可靠度。透過JNI在Java控制軟體及控制器底層驅動程式 (C Code) 之間建立互動溝通的管道；系統函式庫的建置，協助監控系統對控制器之驅動程式進行連結；透過Java提供的API(Application Program Interface)，完成系統人機介面 (Human Machine Interface, HMI) 開發及配置。最後，利用訊號模擬裝置進行控制及監視的可行性測試與控制軟體的反應時間量測，驗證其可行性及效能。此外，透過本研究所使用的JNI控制介面，針對即時反應效能的評估與Socket方式比較之下，提供了更佳的即時性能解決方案。

This thesis aims at equipments of wastewater processing station to implement an open monitor-control system platform that combined with Java, JNI technology, opening controller structure, and RTLinux operation system. We hope to reduce the respondent time of input/output modules, and hope to heighten function and reliability of system. By JNI, we build up communication between controlware (Java code) and controller’s drivers (C code); by establishing library in RTLinux, we assist about linking up monitor-control system with PC-Based controller; by Java’s API, we accomplish development and configuration for Human Machine Interface (HMI). Eventually, we use signal simulated to test the workability for system and to measure the respondent time of I/O modules in order to put to in the proof. Besides, we compare with Socket to be directed against estimation of real time efficiency. The results show that JNI provides better proposal of solvent for real time.

摘要…………………………………………………………………………i
Abstract……………………………………………………………………ii
誌謝…………………………………………………………………………iii
Contents……………………………………………………………………iv
List of Figures…………………………………………………………vii
List of Tables……………………………………………………………ix
Chapter 1 Introduction1
1.1 Background1
1.1.1 Programming Language1
1.1.2 Industrial Controller3
1.1.2.1 Program Logic Controller (PLC)3
1.1.2.2 Personal Computer Based Controller (PC-BASED PLC)5
1.1.3 Operation System7
1.2 Purpose8
1.3 Related Applications9
1.4 Architecture9
Chapter 2 Operation System and Controller11
2.1 Operation System11
2.1.1 Meaning of Real-Time OS11
2.1.2 Real-Time OS and Time-Sharing OS11
2.1.3 Hard Real-Time and Soft Real-Time12
2.1.4 Superiority of RTOS13
2.2 Summarizing RTLinux14
2.2.1 Advantages14
2.2.2 Framework of Kernel15
2.2.3 Module15
2.2.4 Communication Between Travels17
2.2.5 Scheduling criterion18
2.3 How to make dynamic link19
2.4 Features of Controller20
Chapter 3 Java Technology for Monitoring23
3.1 Java Technology23
3.2 Questions In Java Support Real-Time24
3.2 I/O Interface26
3.2.1 About Java Native Interface26
3.2.2 I/O Interface29
3.3 JNI Practice33
Chapter 4 Accomplish Monitor-Control System36
4.1 System Structure36
4.2 Display of HMI40
4.3 Tests for Respondent Time43
4.3.1 Average Respondent Time43
4.3.2 Average First Respondent Time48
Chapter 5 Conclusion52
5.1 Conclusion52
5.2 Future Work53
Reference54

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