声控延时综合实验设计与实践

针对传统电类基础实验课开设的实验项目通常以单个实验形式呈现给学生,不利于提高学生的综合实践能力,为此设计开发了多个综合实验项目。介绍一种声控延时实验项目的设计与实践过程。该实验综合运用常用电子仪器和分压偏置式单管放大电路、运放放大器线性应用电路、施密特整形电路、NE555单稳态定时闸门电路、计数显示电路共6个常规实验模块,实现了声控延时功能。实践内容集成了常规电工电子实验的15个知识点,并给出了评价完成实验项目的指标点。电类本科生的教学实践证明,该实验能有效提高学生的电路设计与综合应用能力,教学效果良好。

Design and Practice of Voice-controlled Delay Experiment in Comprehensive Experimental Project of Electric Basic Experiment Course

The traditional projects of electric basic experiment is presented to the students in a single experimental form,and is not conducive to improving the students’comprehensive practical ability,the curriculum team of our school has designed and developed several comprehensive experimental projects,and the design and practice of the project of“voice-controlled delay experiment”is introduced in detail in this paper.In this experiment,6 conventional experimental modules,such as common electronic instruments,partial voltage bias single-tube amplification circuit,op amp linear application circuit,Schmitt shaping circuit,NE555 monostable timing gate Circuit and counting display circuit,are used to realize the voice-controlled delay function.The practice content integrates the 15 knowledge points of the conventional electrical and electronic experiment,and gives the index point for evaluating the completion of the experimental project.It improves the students’circuit design and comprehensive application ability through the teaching practice of the undergraduates of electrical class,and the teaching effect is good.