Patent ID: 11899097
Assignee: KABUSHIKI KAISHA TOSHIBA
Field: Measurement (Instruments)
Classification: CPC G | IPC G

Claim 16:
17. The distance measurement method according to claim 16, wherein
the first device performs, twice or more, sampling of the second phase information for one period of the second demodulated signal or longer,
an elapsed time ta2 of the first device from a time point at which the reception of the second demodulated signal is started, to a time point at which the second demodulated signal is sampled is calculated by using three continuous samples including the two samples of the second demodulated signal for a second time,
the second flight time tx,err2 is calculated by

tx,err2=(TS−ta2−tb2)/2

in place of the calculation expression,
an average flight time is calculated by averaging the first flight time tx,err1 and the second flight time tx,err2, and
the distance is calculated based on the average flight time.