發(fā)布時間：2018-11-12 18:03

【摘要】：嵌入式圖形儀表系統(tǒng)已成為工程機械領(lǐng)域重要的核心部件之一。傳統(tǒng)的工程機械儀表由于顯示信息少,智能化程度低和指針易磨損等缺點,將逐漸被淘汰�，F(xiàn)代智能儀表系統(tǒng)集成了工作信息顯示、機器工作參數(shù)設(shè)置、故障診斷、遠程監(jiān)控及娛樂媒體等多種功能,使得儀表板朝著高智能化方向發(fā)展。 為實現(xiàn)工程機械儀表系統(tǒng)高度智能化,本文對儀表系統(tǒng)所采用總體結(jié)構(gòu)、硬件開發(fā)、軟件設(shè)計、設(shè)計關(guān)鍵技術(shù)點等進行了深入研究。充分發(fā)揮嵌入式軟件與工業(yè)設(shè)計相結(jié)合的優(yōu)點,開發(fā)挖掘機嵌入式圖形儀表系統(tǒng)。 首先,根據(jù)挖掘機儀表系統(tǒng)圖形顯示質(zhì)量要求,研究多圖層圖像處理器顯示原理,并在此基礎(chǔ)上提出嵌入式圖形儀表系統(tǒng)開發(fā)方案。 其次,深入分析儀表系統(tǒng)啟動速度慢、閃爍及指針走樣等問題產(chǎn)生的原因,提出防閃爍技術(shù)、快速啟動技術(shù)及指針走樣處理技術(shù)等解決方案。 再次,根據(jù)挖掘機儀表系統(tǒng)的基本要求,選擇以瑞薩SH2A-FPU為內(nèi)核的SOC芯片SH7264為主控芯片,設(shè)計儀表板硬件系統(tǒng)。分析各功能模塊具體設(shè)計方案,并對LCD的低壓差分信號(LVDS)轉(zhuǎn)換原理等硬件模塊進行了較為詳細的論述。 然后,研究儀表系統(tǒng)功能需求,設(shè)計系統(tǒng)軟件架構(gòu),以C語言為編程語言,開發(fā)系統(tǒng)軟件,包括底層驅(qū)動程序和應(yīng)用程序設(shè)計,其中底層驅(qū)動程序主要是各硬件模塊初始化及接口函數(shù)設(shè)計；應(yīng)用程序包括前、后臺應(yīng)用程序。 最后,對各個功能模塊進行聯(lián)調(diào)、優(yōu)化,提高軟件可靠性。詳細討論與制定挖掘機儀表板與控制器的通訊協(xié)議,提高兩者的數(shù)據(jù)通訊效率及信息的可靠性。 本文采用帶有圖像處理器的主控芯片開發(fā)挖掘機嵌入式圖形儀表系統(tǒng),探索了圖像分層技術(shù)的軟件開發(fā)方法,考慮了挖掘機儀表電氣性能及電磁兼容性要求,解決了儀表系統(tǒng)啟動速度慢、閃爍及指針走樣等問題。本文所研究的嵌入式圖形儀表系統(tǒng)對提升國內(nèi)工程機械附加值、推進產(chǎn)業(yè)升級換代具有較大的研究價值。
[Abstract]:Embedded graphic instrument system has become one of the most important components in the field of construction machinery. Traditional construction machinery instruments will be eliminated gradually because of the shortcomings of less information, less intelligence and easy wear and tear of pointers. The modern intelligent instrument system integrates many functions, such as work information display, machine working parameter setting, fault diagnosis, remote monitoring and entertainment media, etc., which makes the instrument board develop towards the direction of high intelligence. In order to realize the high intelligence of the instrument system of construction machinery, the overall structure, the hardware development, the software design and the key technical points of the instrument system are studied in this paper. The embedded graphic instrument system of excavator is developed by making full use of the advantages of the combination of embedded software and industrial design. Firstly, according to the quality requirement of excavator instrument system, the display principle of multi-layer image processor is studied, and the development scheme of embedded graphic instrument system is put forward. Secondly, the causes of the problems such as slow starting speed of instrument system, flicker and pointer aliasing are deeply analyzed, and the solutions such as anti-flicker technology, fast starting technology and pointer aliasing processing technology are put forward. Thirdly, according to the basic requirements of the excavator instrument system, the instrument board hardware system is designed based on the SOC chip SH7264 with Reza SH2A-FPU as the core. The design scheme of each function module is analyzed, and the principle of (LVDS) conversion of low voltage differential signal of LCD is discussed in detail. Then, the functional requirements of instrument system are studied, and the system software architecture is designed. The system software is developed with C language, including the underlying driver and application program design. The underlying driver is the initialization of each hardware module and the design of interface function. Applications include front and background applications. Finally, each functional module is combined and optimized to improve the reliability of the software. The communication protocol between instrument board and controller of excavator is discussed in detail to improve the efficiency of data communication and the reliability of information. In this paper, the embedded graphics instrument system of excavator is developed by using the master control chip with image processor. The software development method of image stratification technology is explored, and the requirements of electric performance and electromagnetic compatibility of excavator instrument are considered. It solves the problems of slow starting speed, flicker and pointer aliasing of the instrument system. The embedded graphic instrument system studied in this paper has great research value to enhance the added value of domestic construction machinery and promote the upgrading of industry.
【學位授予單位】：華僑大學
【學位級別】：碩士
【學位授予年份】：2012
【分類號】：TP368.1

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