發(fā)布時(shí)間：2019-05-09 07:19

【摘要】：數(shù)字信息已經(jīng)完全融入生存的這個(gè)時(shí)代，目前，幾乎所有信息控制領(lǐng)域都采用大量的嵌入式系統(tǒng)來完成所需的各種工作。本文研究并最終實(shí)現(xiàn)了利用ARM2440嵌入式平臺開發(fā)用于微機(jī)監(jiān)測系統(tǒng)中的移頻采集機(jī)功能。本文開發(fā)的這個(gè)系統(tǒng)所使用的處理器的型號為S3C2440A，它的主頻高達(dá)400MHz，而且它具有強(qiáng)大的運(yùn)算能力。利用該芯片以及各種外圍器件實(shí)現(xiàn)的移頻采集機(jī)功能一方面可以滿足移頻監(jiān)測的快速準(zhǔn)確特性，另一方面可以在該平臺上實(shí)現(xiàn)所需的人機(jī)交互界面，用于形象的展示所有其他功能模塊，為將來開發(fā)各種新功能提供了便利，提高了平臺的可擴(kuò)展性。 本文首先詳細(xì)說明了移頻信號的基本概念和生成原理，并全面介紹了移頻測量的基本步驟和內(nèi)容。除此之外，本文利用工業(yè)領(lǐng)域比較常用的Matlab軟件仿真和實(shí)現(xiàn)了移頻算法，并對其與數(shù)學(xué)計(jì)算獲得的數(shù)據(jù)進(jìn)行分析，中心頻率的精度為1Hz，測量精確度可以滿足要求的0.1Hz，從而說明了其可行性。最后，本文利用S3C2440嵌入式平臺以及平臺上的AD模塊和定時(shí)器等相關(guān)硬件以及通過嵌入式軟件編程實(shí)現(xiàn)了移頻監(jiān)測系統(tǒng)，并最終能夠在液晶顯示屏上顯示相關(guān)結(jié)果和供相關(guān)人員操作，實(shí)現(xiàn)了當(dāng)初提出的實(shí)時(shí)采樣指標(biāo)。 本文所實(shí)現(xiàn)的移頻監(jiān)測系統(tǒng)的整體設(shè)計(jì)思路是：首先，對ZP-89以及ZPW-2000A類型的移頻輸入信號進(jìn)行調(diào)整，達(dá)到降壓的目的；其次，利用A/D轉(zhuǎn)換器對輸入的信號進(jìn)行采樣，這些信號能夠給提供系統(tǒng)所需的頻率；接著，采用傅利葉變換以及ZFFT等常用的信號處理公式，方便求出這些信號的移頻信息；最后，利用硬件平臺的液晶顯示器以直觀的方式實(shí)時(shí)輸出計(jì)算出的移頻信息，并且操作人員可以利用觸摸屏或者按鍵操作和控制相關(guān)信息顯示，方便使用。 利用S3C2440嵌入式平臺開發(fā)移頻采集機(jī)雖然實(shí)現(xiàn)了當(dāng)初所提的各種指標(biāo)，但由于平臺處理芯片以及各種外圍芯片的固有限制，最終開發(fā)完成的移頻采集機(jī)在實(shí)時(shí)采樣時(shí)會有部分信息無法采集到，即使利用ZFFT算法也無法獲取這些缺失的信息。因此，，系統(tǒng)有進(jìn)一步完善的空間。
[Abstract]:Digital information has been fully integrated into the age of survival. At present, almost all fields of information control use a large number of embedded systems to accomplish the required work. In this paper, the function of frequency shift collector used in microcomputer monitoring system is developed by using ARM2440 embedded platform. The processor used in this system is S3C2440A, its main frequency is up to 400MHz, and it has powerful computing ability. On the one hand, it can meet the fast and accurate characteristics of frequency shift monitoring, and on the other hand, it can realize the human-computer interface on the platform, which can be realized by using the chip and various peripheral devices to realize the function of the frequency-shift acquisition machine. It is used to display all other functional modules, which provides convenience for the future development of various new functions and improves the scalability of the platform. In this paper, the basic concept and generation principle of frequency shift signal are described in detail, and the basic steps and contents of frequency shift measurement are introduced in detail. In addition, this paper simulates and implements the frequency shift algorithm by using Matlab software, which is commonly used in the industrial field, and analyzes it with the data obtained by mathematical calculation. The accuracy of the center frequency is 1Hz, and the measurement accuracy can meet the requirements of 0.1Hz. Thus, the feasibility of this method is illustrated. Finally, this paper realizes the frequency shift monitoring system by using S3C2440 embedded platform, AD module, timer and other related hardware on the platform, as well as the embedded software programming. Finally, the related results can be displayed on the liquid crystal display screen and can be operated by the relevant personnel, and the real-time sampling index originally proposed is realized. The overall design idea of the frequency shift monitoring system implemented in this paper is as follows: firstly, the frequency shift input signals of ZP-89 and ZPW-2000A are adjusted to achieve the purpose of reducing pressure; Secondly, the A 鈮

本文編號：2472581