AC voltage measurement with digital sampling

作者：Liu Yue^*; Zhang Xiu Zeng; Zhao Hong Gang; Zou Ben Xia

来源：Acta Metrologica Sinica, 2007, 28(SUPPL. DEC.): 124-126.

AC voltage measurement is the base of AC electric quantity measurement. Digital sampling measurement system is developed. In which the AC signal under test is transmitted into the input of A/D converter by voltage follower, and under the control of MCU, A/D converter synchronous sampling by full period, and sampling data is calculated by computer into which transmitted by optocoupler. Consistency of sampling measurement compared with Fluke 5790A is within 2 × 10-5 generally. It is found that the main contribution of uncertainty in the system is the integral nonlinearity (INL) of A/D converter, and the influence of quantization error and timing jitter can be decreased by increasing the sampling frequency.

• 出版日期2007