基于ARM的模拟电路多参数测量

发布时间：2018-07-10 16:05

本文选题：模拟电路 + 参数测量　；参考：《西北师范大学》2015年硕士论文

【摘要】：目前对模拟电路而言,研究者们大都关注于它在实际电路中的应用,而对模拟电路自身参数的研究却比较少。但是模拟电路的自身参数在实际应用中也很重要。现在对模拟电路参数的分析和测量主要有硬件和软件两种方法。硬件测量方法基本是采用如扫频仪等的电子设备对模拟电路进行测量。而软件测量方法主要是采用仿真软件或虚拟仪器对模拟电路进行测量。由于现有的电子仪器大都比较复杂和昂贵,应用并不方便;而现有的仿真软件首先是元件库不完整,还有就是虚拟元件和实际元件毕竟存在着误差,所以经过分析后本论文提出了基于ARM的模拟电路多参数测量方法。并且完成和做出了对应的测量系统。本系统使用STM32系列的ARM芯片作为控制部分,通过软、硬件结合的方法,实现了对模拟电路多参数的测量。本文主要工作概括如下:(1)介绍了模拟电路参数测量的发展现状、研究背景和研究意义。对现有的测量方法进行了总结,并将这些方法与本系统的方法做了相应的对比分析。(2)实现了ARM的整体设计,包括控制DDS信号源产生信号、对信号的采集、对数据的处理和计算、控制液晶显示测试结果等。介绍了所用的信号源AD9854的工作原理和它与ARM之间的连接以及控制流程。(3)硬件检测电路的设计与实现是本文的重点,检测电路主要包括阻抗/电压转换电路、频率特性测量电路、乘法器电路和滤波电路等部分。阻抗/电压转换电路和频率特性测量电路实现对模拟电路信号的提取,乘法器电路实现对信号的加工,滤波电路实现对信号的处理。(4)本系统对模拟电路测量的参数主要包括:幅频特性、相频特性和阻抗特性。经过对基于ARM的模拟电路多参数测量系统的测试和验证,结果表明该系统测量自动化程度较高、测试结果误差较小、抗干扰能力较强。
[Abstract]:At present, researchers mostly pay attention to the application of analog circuits in practical circuits, but the research on the parameters of analog circuits is less. However, the parameters of analog circuits are also very important in practical applications. There are two methods for analyzing and measuring analog circuit parameters: hardware and software. The hardware measurement method is to measure analog circuit with electronic devices such as frequency sweep instrument. The software measurement method mainly uses simulation software or virtual instrument to measure the analog circuit. Because most of the existing electronic instruments are complex and expensive, it is not convenient to use them. However, the existing simulation software first is the incomplete component library, and there are also errors in the virtual components and the actual components after all. After analysis, this paper puts forward a multi-parameter measurement method of analog circuit based on arm. And completed and made the corresponding measurement system. This system uses the arm chip of STM32 series as the control part, through the method of combining software and hardware, realizes the measurement of the analog circuit multi-parameter. The main work of this paper is summarized as follows: (1) the development status, research background and significance of analog circuit parameter measurement are introduced. The existing measurement methods are summarized and compared with the methods of this system. (2) the whole design of arm is realized, including the control of DDS signal source to generate signal, the acquisition of signal, the processing and calculation of data. Control liquid crystal display test results and so on. This paper introduces the working principle of the signal source AD9854, the connection between AD9854 and arm and the control flow. (3) the design and implementation of the hardware detection circuit is the focus of this paper. The detection circuit mainly includes impedance / voltage conversion circuit and frequency characteristic measuring circuit. Multiplier circuit and filter circuit. The impedance / voltage conversion circuit and the frequency characteristic measuring circuit can extract the analog circuit signal, and the multiplier circuit can process the signal. The filter circuit can process the signal. (4) the parameters of this system mainly include: amplitude frequency characteristic, phase frequency characteristic and impedance characteristic. Through the test and verification of the arm based analog circuit multi-parameter measurement system, the results show that the measurement automation degree of the system is high, the test result error is small, and the anti-interference ability is stronger.
【学位授予单位】：西北师范大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TN710

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