【摘要】：隨著無線通信技術在氣動系統中的應用日益廣泛,氣動無線通信系統的可用性研究也愈發的重要。由于氣動系統中的通信對數據的實時性要求極為苛刻,數據傳輸的時延必須嚴格控制。并且氣動系統中通信的特點是數據量小、不確定性強,一般成熟的通信協議很難滿足這些要求,因此研究適用于氣動系統的自定義高速通信協議具有重要意義。本文在分析常見無線通信系統的基礎上,針對氣動系統的通信需求,設計了適用于氣動系統的高速無線通信系統協議,并深入研究了氣動高速無線通信系統的可用性,主要的內容如下:首先,針對氣動系統的工作過程、通信的實時性和可用性的要求,明確了通信數據時延、傳輸速率以及響應時間等指標,并進行了對比研究,確定了氣動系統高速無線通信的技術路徑,提出了基于射頻芯片nRF24L01的自定義高速無線通信協議。通過定義氣動系統的通信時延、自定義高速無線通信協議和模擬氣動工業現場多節點通信沖突的測試方法,搭建了高速無線通信系統的軟件開發與測試平臺。使用Keil開發環境對通信的各個環節進行程序上的優化,包括nRF24L01與MCU之間的SPI數據傳輸、nRF24L01的可變長度數據幀等,以滿足高速無線通信的通信時延要求。對單節點和多節點的通信進行測試與分析。其中在單節點的通信測試中,通過改變通信距離、通信數據幀長度等參數,記錄通信成功率與通信時延;同時通信協議增加了沖突抑制策略,對多節點組網通信進行了沖突測試,用以測試通信協議的沖突抑制性能。最后,通過研究應答方式,設計了高效的組網策略,有效地避免系統數據應答錯誤,并完成了無線通信系統的雙向通信,驗證了方案的可行性,為氣動無線通信系統的可用性研究提供了工程應用參考價值。
[Abstract]:With the increasing application of wireless communication technology in pneumatic systems, the availability of pneumatic wireless communication systems is becoming more and more important. Due to the strict requirement of real-time data in the communication of pneumatic system, the delay of data transmission must be strictly controlled. And the characteristic of communication in pneumatic system is that the data is small and the uncertainty is strong. It is difficult to satisfy these requirements by the general mature communication protocols. Therefore, it is of great significance to study the self-defined high-speed communication protocols suitable for pneumatic systems. Based on the analysis of common wireless communication systems and the communication requirements of pneumatic systems, this paper designs a high-speed wireless communication system protocol suitable for pneumatic systems, and deeply studies the availability of pneumatic high-speed wireless communication systems. The main contents are as follows: firstly, aiming at the working process of pneumatic system and the requirement of real-time and usability of communication, the data delay, transmission rate and response time of communication are defined and compared. The technical path of high-speed wireless communication in pneumatic system is determined, and a custom high-speed wireless communication protocol based on RF chip nRF24L01 is proposed. By defining the communication delay of the pneumatic system, defining the high-speed wireless communication protocol and simulating the testing method of the multi-node communication conflict in the pneumatic industry, the software development and testing platform of the high-speed wireless communication system is built. In order to meet the communication delay requirements of high-speed wireless communication, the Keil development environment is used to optimize the program of each link, including the SPI data transmission between nRF24L01 and MCU, the variable length data frame of nRF24L01 and so on. The communication between single node and multi node is tested and analyzed. In the single node communication test, the communication success rate and communication delay are recorded by changing the communication distance and the length of the communication data frame. At the same time, the collision suppression strategy is added to the communication protocol, and the collision test of the multi-node network communication is carried out to test the performance of the communication protocol. Finally, by studying the response mode, an efficient networking strategy is designed to effectively avoid the error of system data response, and the two-way communication of wireless communication system is completed, which verifies the feasibility of the scheme. It provides the engineering application reference value for the usability research of the pneumatic wireless communication system.
【學位授予單位】：電子科技大學
【學位級別】：碩士
【學位授予年份】：2017
【分類號】：TN92

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