准同步采样及其在常用电工参数数字化测量中的应用

介绍了一种新的采样算法，即准同步采样，其采样周期不要求与信号周期严格同步．并将准同步采样算法应用于电工参数数字化测量中，具有良好的效果，与同步采样具有相当的准确度．计算的精确度和AD的位数有关，AD位数越高，计算也就越精确，通常，若AD的位数为16位，在工程中测量的精度可达万分之二．先介绍了准同步算法的理论依据，然后介绍了准同步系数的推导，最后介绍了如何在DSP中实现准同步算法．

Quasi-synchronous sampling and its application in the digital measurement of common electronical parameter

A new sampling method,namely quasi-synchronous sampling was proposed.The sampling period is not necessarily to be strictly synchronous to that of the signal.And it has a good effect to use quasisynchronous sampling in the digital measure of common electrical parameter having the same accuracy of the synchronous sampling method. The accuracy of the calculation is correspond to the accuracy of AD converter.The algorithm can get a high accuracy if the AD converter has a high accuracy.Usually,if the AD converter has 16 bits,the accuracy of the measurement in the engineering can reach 0.02 percent.The paper first introduces the theory of quasi-synchronous algorithm was introduced,the deduction was proposed of quasi-synchronous coefficient was discussed,and at last the realization of quasi-synchronous algorithm in DSP was proposed.