| Autor: |
Bin-Xiong Yu, Rui Li, Jian-Cang Su, Liang Zhao, Yu Zhang, Lei Zheng, Bo Zeng, Jie Cheng, Peng-Cheng Gao, Xu-Dong Qiu, Xu-dong Xu |
| Předmět: |
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| Zdroj: |
Measurement Science & Technology; Sep2017, Vol. 28 Issue 9, p1-1, 1p |
| Abstrakt: |
Research is carried out on the basis of the traditional two-end matched circuit of a capacitive voltage divider with a long measurement cable. Transmission progress in the circuit is analyzed theoretically. A match condition of the circuit is acquired, which requires that the circuit satisfies two conditions: (1) the measurement error should be small for a pulse with a duration of less than twice the delay time of the measurement cable; (2) the initial division ratio and the stable division ratio of the circuit are the same. Two matched methods of the circuit are acquired, including the first-order matched method and the second-order matched method. Numerical simulations are carried out. According to the simulation results, the relative errors of the circuits with a cable of 20 m are less than 1.5%, obtained by using both match methods for measurement of rectangular pulses with rise and fall times of 5 ns. An improved circuit is presented, which is suitable for any situation where the low-voltage capacitance of the capacitive divider is even smaller than the capaictance of the measurement cable. A verification experment is carried out, and the test result confirms the simulation result. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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