【摘要】 本文介绍了应用虚拟仪器和数据采集卡 ,采用FFT算法实现的低频谐波失真度的测量 ,该方法具有测试频率低、精度高、简便易行等特点。更多还原

【Abstract】 In the paper,The instrument of distortion measuring is introduced which based on the virtual technology.The principle of the device is that by the conversion of the FFT of signal and calculate the degree of distortion of it.Also the results that measuring by the device,by the calculating and another are compared.更多还原