正弦波形畸变校正研究

Correction of sine Waveform Distortion

为了提高正弦信号测量精度,从检测设备的输入电压信号、谐波、温度漂移、信号处理系统及信号重构等方面分析了电信号产生畸变的原因,提出了一种数字校正算法。根据系统信号的产生及处理过程,基于信号重构原理,确定了正弦信号畸变校正方法及其算法程序流程。根据由先验知识及理论模型修正算法,建立补偿模型用单点同步补偿算法,利用Lab Windows/CVI软件平台对该算法进行了信号仿真,仿真结果表明,能有效校正正弦信号中的畸变,为提高正弦信号系统的测量精度奠定了基础。

In order to improve the measurement precision of sine waveform signal, a kind of digital correction algorithm is given based on the reasons of signal distortion in electric circuit system, including the inputting voltage signal of detection device, harmonic, temperature drift, signal dispose system, signal reconstruction etc. A sine signal distortion correction method and its algorithm program flow are made according to the producing and handling process and based on the principle of signal reconstruction. On the basis of the beforehand knowledge and the theoretical model, a model for the single point synchronization compensation algorithm is established. And the signal algorithm is simulated by the Lab Windows/CVI software platform. The result shows that the algorithm is available to revise the distortion of sine waveform. And the method settles the foundation for improving the precision of sine signal measurement system.