摘要：时代在发展，科学在进步，人们对电子元器件的需求量也在日益增多。而电子硬件系统正是由不同功能的电子元器件紧密构成，每个元器件都在其中起着不可或缺的作用，缺一不可。因此设计一个严谨安全的电信号测量仪能为我们的工作带来很多帮助。

仪器本身由电源模块，显示模块，测量模块三个模块构成。电源模块采用能在测量段落获得电力，不需要再从外部获取能源。作为本系统的重点部分，测量模块扮演着很重要的部分。电路实现对频率（0～64khz）和幅度值（0.1v～5v）的测量，并把误差缩小到一定范围内。显示模块运用了LED可同时显示出测量所得的频率和幅值。并且设有报警电路，使电路更加安全可靠。经使用后程序运行流畅，操作简单。该系统以msp430为核心，结合单片机的计算功能设计了测量方波正弦波频率幅度的电信号测量仪，测量标准符合要求。

关键词  单片机  MSP430  电信号测量仪   LCD

毕业设计说明书外文摘要

Title    Electric signal measuring instrument                     

Abstract：With the development of the times and the progress of science, the demand for electronic components is increasing day by day. The electronic hardware system is composed of different functions of electronic components, each component plays an indispensable role, indispensable. Therefore, the design of a safe and secure electrical signal measuring instrument can  help our work.

The instrument itself is made up of three parts: power supply, display and measurement. Power can be used to obtain power in the measurement section, no need to obtain energy from the outside. As the key part of the system, the measurement module plays a very important part. Rational use of the principle of FPGA circuit to achieve the frequency (0～64khz) and amplitude (0.1v～5v) measurement, and the error is reduced to a certain extent. Display module using the LED can display the measured frequency and amplitude. And alarm circuit, so that the circuit is more secure and reliable. After the program runs smoothly, simple operation. The system uses MSP430 as the core, combined with the calculation function of single chip microcomputer to design the electric signal measuring instrument measurement standards meet the requirements.

Keywords  MCU   MSP430  electrical signal measuring instrument    LCD

目   次

1  引言 1

1.1  设计背景及意义 1

1.2  设计的任务及要求 1

1.3 电子器件测试仪的发展历史及研究现状 2

2  总体设计方案 3

3  电信号测量仪的硬件系统设计 4

3.1  MSP430单片机电路设计 4

3.2  12864液晶显示屏设计 8

3.3  按键电路设计 10

3.4  信号调理电路 11

3.5  信号比较电路 14

3.6   直流稳压电路 15

4  电信号测量仪的软件系统设计 17