The design of a high-precision instrument for inductance and capacitor measurement
Abstract: At present, the problem of the light equipment for inductance and capacitor measurement is low accuracy and lacking of intelligence. In view of this reason, the paper introduced a high-precision instrument for inductance and capacitor measurement based on single-chip. As a result of inductance and capacitor are reactors components, DC can not be used to generate measurement signals, but only AC signals. The design adopted AD9850 to produce a high accuracy sine wave signal, which is implemented through the series circuit of the capacity or the inductance and the standard resistance. By measuring the relevant quantity, the “phase+RMS” approach is used to estimate the value of capacitance or inductance. By taking full advantaged of the single-chip computing and control functions to facilitate the realization of measurement, the measurement accuracy has been enhanced. At the same time, a number of software programs instead of hardware measurement circuit under the hardware architecture invariable situation are applied to modify the software to add new functions, which may complete a very good measurement of various parameters in order to meet the needs of modern measurement and control system.