基于USB接口的高性能虚拟示波器的开发实现

为实现虚拟示波器高速数据采集,同时方便采集卡的连接与扩展,在分析USB通讯原理的基础上,将数据采集、数据转换和USB通讯控制功能集成在一个模块中,通过高速USB口与高性能的计算机进行通讯。采用VB编写用户操作界面,实现实时显示、谐波分析和历史数据保存等各种功能。与常规示波器相比,不但简化了结构,提高了测试性能,而且实现了测试自动化。

Implementation and Realization of a High-performance Virtual Oscillograph Based on USB

For achieving high speed data acquisition in virtual oscilloscope,linking and expanding the acquisition cards expediently at the same time,data acquisition,data conversion and USB communication is integrated in one module.The module communicates with the high performance PC through USB interface.Real-time display,harmonic analysis and saving of historic data can be finished in the customer interface programmed by Visual Basic.Comparing with the normal oscilloscope,the new system not only simplifies the structure,improves testing performance,but also implements test automation.