示波器实验的教学改革

示波器的原理和使用是大学物理实验教学的一个基础实验项目.传统的教学仅限于向学生介绍示波器显示波形的原理,测量信号电压、频率和周期等参数,以及采用利萨如图形测量待测信号频率等内容.随着科技的进步,传统的模拟示波器已经逐步被数字示波器所替代,一些高校实验项目也做了相应的调整.本课题探讨数字示波器的实验拓展,即结合压电传感器采集人体不同部位的脉搏信号,并通过对采集多组信号的数据分析,讨论脉搏信号特征与人体部位、性别以及时间段的关联性.

Teaching Reform on Oscilloscope Experiment

The principle and use of oscilloscope is a basic experimental project in college physics experiment teaching.The traditional teaching is only limited to introducing some information,including the principle of oscilloscope display waveform,measuring the voltage,frequency,period and other parameters of the signals in oscilloscope,to students.In addition,measuring the frequency of the signal by Lissajou graph.However,with the progress of science and technology,the traditional analog oscilloscope has been gradually replaced by digital oscilloscope,and some experimental projects in universities have been adjusted accordingly.This topic discusses the experimental expansion of digital oscilloscope,that is,collecting pulse signals from different parts of the human body combined with piezoelectric sensors,and discussing the correlation between the properties of pulse signals and human parts,gender and time through the data analysis of multiple groups of signals.