基于LabVIEW的抽象化模拟电路实验教学系统

针对模拟电路实验教学系统的应用需求，为使学生更好地掌握模拟电路信号产生与处理方法，通过将具体的电路元件抽象为数学模型，采用LabVIEW 软件开发设计了抽象化的模拟电路信号产生与处理实验教学系统。根据教学实验的内容设计了3 个实验模块，每个模块包含不同的实验项目，涵盖了模拟电路信号产生与处理的基础部分与实际应用等内容。给出了实验模块的设计原则，并依次阐述了模块的实验原理与内容，以具体的实验案例模块为例讲解了模拟锁相放大器的设计与使用方法。该系统既融合了模拟电路信号产生与处理的基本知识，又拓展了锁相放大、仪表放大、线性变换等应用实例。实际应用表明，基于LabVIEW 的模拟电路实验系统满足课程的实验教学要求，取得了较好的教学效果。

Abstracting and Experimental Teaching System of Analog Circuit Based on LabVIEW

In accordance with the requirements of the analog circuit experimental teaching system，in order to help students to further master the analog circuit signal generation and processing method，by abstracting specific circuit elements into mathematical models，an analog circuit signal generation and processing teaching system is developed based on LabVIEW software． According to the content of the teaching experiment，three experimental modules are designed． Each module contains different experimental items，covering the basic part and actual application of analog circuit signal generation and processing． The design principle of the experimental module is given，and the experimental principle and content of the different modules are discussed． The specific experimental case module is taken as an example to explain the design and use of the lock-in amplifier． This system integrates the basic knowledge of signal generation and processing of analog circuit and expands the application of lock-in amplifier，instrumental amplifier and linear transformation． The practical application shows that the experimental system based on LabVIEW meets the experimental teaching requirements of the course and has achieved good teaching results．