基于LabVIEW的虚拟功率分析仪设计

采用计算机仿真技术，用LabVIEW设计了一个虚拟功率分析仪，对同频率的正弦电压和正弦电流的有效值、相位差及其功率和瞬时功率进行了测试和显示，并给出了连续信号经采样后电压和电流有效值、功率和相位等电信号参数测量原理。实践证明，虚拟仪器可简化硬件电路设计，减少测试成本，而且在智能化程度、处理能力、可操作等方面比传统仪器更有优势。

Design of virtual power analyzer based on LabVIEW

In this paper,a virtual power analyzer based on LabVIEW is designed by utilizing computer simulation,and the measurement and display of these parameter of sinusoidal voltage and sinusoidal current such as RMS,phase difference,power and instantaneous power are introduced.The sampled signal measurement principle of RMS,phase difference and power is also presented.It is veritified that the circuit design is simplified and the cost of measurement is reduced by using virtual instrument.Furthermore virtual instrument has more advantages than traditional instrument on intelligence,handling and easy operation.