基于NI采集卡的虚拟示波器的开发实现

The Design of a Virtual Oscilloscope Based on NI Daq

运用多线程运行的软件结构,提出了一种虚拟示波器的设计方案。利用软件和硬件共同完成对示波器的触发。利用软件滤波提高了示波器信号处理的精度,利用线性插值算法重构信号。与传统示波器相比,虚拟示波器具有灵活,更新快,存储深度深,快速谱分析和资源共享的优点。

A virtual oscilloscope design is presented based on a software structure by multithread operation. The trigger in oscilloscope is introduced in both software and hardware . The accuracy of signal processing for virtual oscilloscope is improved by software filtering and the original signal is reconstructed using Linear Interpolation Algorithm. Compared with a traditional oscilloscope, it can be seen that a virtual oscilloscope is more flexible and updated faster, furthermore, it has advantages of deeper storage, faster spectrum analysis and resource share in higher speed.