【摘要】：傳統(tǒng)的電路故障檢測手法主要是基于人工,需要測量電路中的電壓、電流以及輸入、輸出參數(shù),結(jié)合故障現(xiàn)象和電路的原理圖,對故障進(jìn)行仔細(xì)分析和推敲,才能診斷出現(xiàn)故障的電路或者出現(xiàn)故障的元器件。電子技術(shù)發(fā)展非常迅速,電子電路板上的元器件密集程度增加,元器件封裝尺寸變小,大規(guī)模和超大規(guī)模集成電路已經(jīng)得到了廣泛應(yīng)用,傳統(tǒng)檢測手法已經(jīng)很難滿足現(xiàn)代檢測需求。 基于紅外成像技術(shù)的電路故障檢測系統(tǒng),由于其非接觸、安全、直觀和快速等優(yōu)點,得到了廣泛的推廣,在電路故障檢測領(lǐng)域有廣闊前景�，F(xiàn)有的紅外電路故障檢測系統(tǒng)主要基于PC平臺,控制能力強(qiáng),內(nèi)部資源豐富,運(yùn)算能力強(qiáng)大,適合算法研究。但是,PC平臺是面向大眾的,所以基于PC平臺的紅外檢測儀有體積大、笨重和不方便攜帶的缺點。由于嵌入式系統(tǒng)是為特殊用戶設(shè)計的,滿足其特殊需求所設(shè)計的系統(tǒng),并且具有可裁剪的特點,因而具有高度集成、體積小、功耗低和維護(hù)方便等優(yōu)點。本文基于嵌入式系統(tǒng)的優(yōu)點,采用ARM11作為紅外電路故障檢測的平臺,開發(fā)低成本、高效和高攜帶性的紅外電路故障檢測系統(tǒng)。 本文主要闡述以ARM11為平臺的紅外電路故障檢測儀的原理和系統(tǒng)硬件,主要的研究內(nèi)容如下： (1)闡述紅外電路故障檢測技術(shù)的歷史和原理以及嵌入式處理終端的優(yōu)勢； (2)總體分析紅外電路故障檢測系統(tǒng)的構(gòu)架,設(shè)計系統(tǒng)的總體方案； (3)在了解ARM11構(gòu)架的基礎(chǔ)上詳細(xì)設(shè)計硬件原理圖,將整體電路分為圖像處理及顯示模塊、存儲模塊、外圍電路模塊、圖像采集和視頻編解碼模塊； (4)將LINUX操作系統(tǒng)經(jīng)過裁剪和編譯最后移植到紅外電路故障檢測系統(tǒng)并進(jìn)行實驗驗證紅外電路故障檢測系統(tǒng)可以正常工作 本文主要創(chuàng)新點是：放棄傳統(tǒng)的PC平臺,提出了基于嵌入式平臺的紅外電路故障檢測設(shè)備,在減小體積,減小重量以及提高便攜性方面有很大進(jìn)步。據(jù)本人所知,現(xiàn)在國內(nèi)尚未見到采用ARM11作為紅外電路故障檢測系統(tǒng)平臺的成熟的論文和報道。 經(jīng)過軟硬件測試表明,本文所設(shè)計的便攜式紅外電路故障檢測系統(tǒng)能完成紅外圖像采集和電路故障檢錯,且性能穩(wěn)定,達(dá)到預(yù)期目標(biāo)。
[Abstract]:The traditional circuit fault detection method is mainly based on manual, it needs to measure the voltage, current, input and output parameters of the circuit, combined with the fault phenomenon and circuit schematic diagram, the fault is carefully analyzed and examined. To diagnose faulty circuits or faulty components. With the rapid development of electronic technology, the density of components on electronic circuit boards has increased, the package size of components has become smaller, and large scale and very large scale integrated circuits have been widely used. Traditional detection techniques have been difficult to meet the needs of modern detection. The circuit fault detection system based on infrared imaging technology, because of its advantages of non-contact, safety, intuitionistic and fast, has been widely popularized, and has a broad prospect in the field of circuit fault detection. The existing infrared circuit fault detection system is mainly based on PC platform, which has strong control ability, rich internal resources and powerful operation ability, which is suitable for algorithm research. But the PC platform is open to the public, so the infrared detector based on PC platform has the disadvantages of large volume, heavy and inconvenient to carry. Because the embedded system is designed for special users and meets its special needs and has the characteristics of tailoring, it has the advantages of high integration, small size, low power consumption and easy maintenance. Based on the advantages of embedded system, this paper uses ARM11 as the platform of infrared circuit fault detection, and develops a low cost, high efficiency and high portability infrared circuit fault detection system. This paper mainly describes the principle and hardware of the infrared circuit fault detector based on ARM11. The main research contents are as follows: (1) the history and principle of the infrared circuit fault detection technology and the advantages of the embedded processing terminal; (2) analyze the frame of the infrared circuit fault detection system and design the overall scheme of the system; (3) on the basis of understanding the ARM11 framework, design the hardware schematic diagram in detail, and divide the whole circuit into image processing and display module. Storage module, peripheral circuit module, image acquisition and video codec module; (4) transplanting the LINUX operating system to the infrared circuit fault detection system after cutting and compiling, and making experiments to verify that the infrared circuit fault detection system can work normally. The main innovation of this paper is: Abandon the traditional PC platform, A fault detection device for infrared circuits based on embedded platform is proposed, which has great progress in reducing volume, reducing weight and improving portability. As far as I know, there is no mature paper and report on using ARM11 as the platform of infrared circuit fault detection system. The software and hardware tests show that the portable infrared circuit fault detection system designed in this paper can complete infrared image acquisition and circuit fault detection, and its performance is stable, and the desired goal is achieved.
【學(xué)位授予單位】：電子科技大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2012
【分類號】：TP368.1

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