The invention discloses a dynamic calibration method and
system for a
delay chain, and relates to the technical field of time measurement, and the method comprises the following steps: inputting a random pulse with a set time length into a to-be-calibrated
delay chain, and obtaining a plurality of jump series outputted by the to-be-calibrated
delay chain under different random pulse inputs; judging whether the maximum value in the plurality of jump series is located in a preset
confidence interval or not, and obtaining the maximum number of current interpolation delay units of the delay chain to be calibrated according to a judgment result; the actual
delay duration of the delay units in the delay chain to be calibrated is obtained through the maximum number of the current interpolation delay units and the
clock signal, and the delay chain to be calibrated is calibrated through the actual
delay duration. According to the invention, the resolution of the time interval is dynamically monitored, the actual value of the
time resolution instead of the preset value is used in the calculation of the time interval, the deviation of the measured value of the time interval is reduced, the delay change caused by the change of the external environment is compensated, and the precision of the time measurement result is improved.