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

Claim 6:
7. The distance measurement device according to claim 6, wherein
the first transmitter-receiver performs, twice or more, sampling of the second phase information for one period of the second demodulated signal or longer, and
the calculation unit
calculates, by using three continuous samples including the two samples of the second demodulated signal for a second time, 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 obtained,
calculates the second flight time tx,err2 by

tx,err2=(TS−ta2−tb2)/2

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