In this study, we show the results of some traditional experiments, performed by using an inexpensive dual-trace cathode ray oscilloscope (CRO), combined with an automated data extraction tool (based on image processing techniques) to learn about their fundamentals. This tool, called a WebPlotDigitizer (WPD) is an opensource software program ( https://automeris.io/WebPlotDigitizer/download.html [https://automeris.io/WebPlotDigitizer/download.html] ) to extract numerical data from a variety of plots uploaded as an image. We emphasize that the WPD is an exceptionally versatile and easy-to-use tool that works both online (within web browsers) and offline. We also show that it is a straightforward and speedy tool to reproduce the results with pragmatic accuracy. Here, we processed CRO screen snapshots (images) acquired using a digital camera (or smart phone), by WPD to extract the numerical data of the waveforms (curves) and then replotted them. We then suggested the exe...

中文翻译：

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从示波器屏幕快照获得的非常方便的自动数值数据提取工具

在这项研究中，我们展示了一些传统实验的结果，这些实验是通过使用廉价的双迹阴极射线示波器（CRO）结合自动数据提取工具（基于图像处理技术）来了解其基本原理的。此工具称为WebPlotDigitizer（WPD）是一种开源软件程序（https://automeris.io/WebPlotDigitizer/download.html [https://automeris.io/WebPlotDigitizer/download.html]），可从各种以图片形式上传的地块。我们强调WPD是一种非常通用且易于使用的工具，可以在线（在Web浏览器中）和离线使用。我们还表明，它是一种简单实用的工具，可以以务实的准确性重现结果。这里，我们通过WPD处理了使用数码相机（或智能手机）获取的CRO屏幕快照（图像），以提取波形（曲线）的数值数据，然后重新绘制。然后，我们建议执行...