High-precision voltage source remote calibration and voltage-to-frequency conversion self-calibration technology

Abstract This paper proposes a remote DC voltage calibration system that combines GPS common-view synchronization with a self-calibrating voltage-to-frequency converter (VFC). The system uses the GPS 1 pulse-per-second signal to achieve precise time alignment and implements a dynamic self-calibration algorithm that corrects frequency conversion errors in real-time. A compact hardware design integrates a frequency counter, time interval analyzer, and VFC module into a single portable unit. By capturing the rising edge of pulses, the system can determine voltage deviation using only one measurement cycle, significantly improving speed and accuracy. Experimental results show a maximum relative error of 0.000 025%, demonstrating superior stability over traditional methods. The system reduces cost, improves automation, and offers practical value for on-site precision calibration in advanced manufacturing and instrumentation.