發(fā)布時(shí)間：2018-11-05 13:33

【摘要】：隨著無(wú)線通信技術(shù)在氣動(dòng)系統(tǒng)中的應(yīng)用日益廣泛,氣動(dòng)無(wú)線通信系統(tǒng)的可用性研究也愈發(fā)的重要。由于氣動(dòng)系統(tǒng)中的通信對(duì)數(shù)據(jù)的實(shí)時(shí)性要求極為苛刻,數(shù)據(jù)傳輸?shù)臅r(shí)延必須嚴(yán)格控制。并且氣動(dòng)系統(tǒng)中通信的特點(diǎn)是數(shù)據(jù)量小、不確定性強(qiáng),一般成熟的通信協(xié)議很難滿足這些要求,因此研究適用于氣動(dòng)系統(tǒng)的自定義高速通信協(xié)議具有重要意義。本文在分析常見(jiàn)無(wú)線通信系統(tǒng)的基礎(chǔ)上,針對(duì)氣動(dòng)系統(tǒng)的通信需求,設(shè)計(jì)了適用于氣動(dòng)系統(tǒng)的高速無(wú)線通信系統(tǒng)協(xié)議,并深入研究了氣動(dòng)高速無(wú)線通信系統(tǒng)的可用性,主要的內(nèi)容如下:首先,針對(duì)氣動(dòng)系統(tǒng)的工作過(guò)程、通信的實(shí)時(shí)性和可用性的要求,明確了通信數(shù)據(jù)時(shí)延、傳輸速率以及響應(yīng)時(shí)間等指標(biāo),并進(jìn)行了對(duì)比研究,確定了氣動(dòng)系統(tǒng)高速無(wú)線通信的技術(shù)路徑,提出了基于射頻芯片nRF24L01的自定義高速無(wú)線通信協(xié)議。通過(guò)定義氣動(dòng)系統(tǒng)的通信時(shí)延、自定義高速無(wú)線通信協(xié)議和模擬氣動(dòng)工業(yè)現(xiàn)場(chǎng)多節(jié)點(diǎn)通信沖突的測(cè)試方法,搭建了高速無(wú)線通信系統(tǒng)的軟件開(kāi)發(fā)與測(cè)試平臺(tái)。使用Keil開(kāi)發(fā)環(huán)境對(duì)通信的各個(gè)環(huán)節(jié)進(jìn)行程序上的優(yōu)化,包括nRF24L01與MCU之間的SPI數(shù)據(jù)傳輸、nRF24L01的可變長(zhǎng)度數(shù)據(jù)幀等,以滿足高速無(wú)線通信的通信時(shí)延要求。對(duì)單節(jié)點(diǎn)和多節(jié)點(diǎn)的通信進(jìn)行測(cè)試與分析。其中在單節(jié)點(diǎn)的通信測(cè)試中,通過(guò)改變通信距離、通信數(shù)據(jù)幀長(zhǎng)度等參數(shù),記錄通信成功率與通信時(shí)延;同時(shí)通信協(xié)議增加了沖突抑制策略,對(duì)多節(jié)點(diǎn)組網(wǎng)通信進(jìn)行了沖突測(cè)試,用以測(cè)試通信協(xié)議的沖突抑制性能。最后,通過(guò)研究應(yīng)答方式,設(shè)計(jì)了高效的組網(wǎng)策略,有效地避免系統(tǒng)數(shù)據(jù)應(yīng)答錯(cuò)誤,并完成了無(wú)線通信系統(tǒng)的雙向通信,驗(yàn)證了方案的可行性,為氣動(dòng)無(wú)線通信系統(tǒng)的可用性研究提供了工程應(yīng)用參考價(jià)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(xué)位授予單位】：電子科技大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類號(hào)】：TN92

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