交流电力智能传感器中功率的一种高效测试方法

基于误差LMS,提出了交流电力智能传感器的一种功率测试方法,在对关键采样点作基于误差LMS线性估计的基础上对该方法进行了改进.改进后的测试方法能够在不增加任何硬件开销和额外运算时间的情况下有效抑制干扰对测试的影响,从而降低对测试信号的要求、简化系统、提高实时性等测试性能.实验表明,相对于传统的定义法,这种改进分析法可减少3倍左右用于分析的采样点数,干扰幅值的要求从小于信号幅值的5%可放宽到信号幅值的15%.

An Efficient Approach to Test Power for AC Power Smart Sensor

For AC power smart sensor,a power test method is proposed based on error LMS principle.Some key sample points are estimated linearly based on error LMS which are improved.The improved method can reduce the impact of interference in signal on the test precision without any additional overhead in hardware and computing time.Therefore the quality requirements for signal can be declined,the system is simplified,the cost is reduced and measurement performance such as real time is resulted in.Results of the experiment show that compared to the traditional way of the definition,the improved method can reduce number of the sample data for the power analysis by about three times and the noise amplitude can be permitted from less 5% to 15% of signal amplitude.