Counting device, physical quantity sensor, counting method and physical quantity measuring method

摘要

The counting device (7) includes: a signal counter (73) that counts the number of half cycles of input signals during given counting periods; and a counting result corrector (74) that includes a signal half cycle measurement unit (740) that measures the half cycles; a frequency distribution generator (741) that generates a frequency distribution of the half cycles; a representative value calculator (742) configured to calculate a representative value of a distribution of the half cycles; and a correction value calculator (743) configured to calculate a total number Ns and a total number Nw n so as to correct the number of the half cycles, wherein Ns represents the total of the number of the half cycles that are less than 0.5 times the representative value, and Nw n represents the total of the number of the half cycles that are equal to or greater than 2n and less than (2n + 2) times the representative value.