Abstract:High speed ADC is employed in the free fall absolute gravimeter to record the integral fringe waveform, acquiring more information about local gravity. We discuss variations in gravity acceleration due to some parameters such as amplitude of the fringe voltage signal, ADC bits, reference voltage, and sampling frequency. The analysis shows that the gravity error caused by ADC quantization could be limited to 0.01 μGal by parameters optimization.
HU Ming,ZHONG Min. Quantizing Noise Impact Analysis of the Two-Sample Zero-Crossing Methodin the Free Fall Absolute Gravimeter[J]. jgg, 2017, 37(9): 973-976.