Patent ID: 11953582
Assignee: INDUSTRY-ACADEMIC COOPERATION FOUNDATION, YONSEI UNIVERSITY
Field: Measurement (Instruments)
Classification: CPC G | IPC G

Claim 6:
7. A distance measuring method for a distance measuring apparatus, the distance measuring method comprising:
generating digital-to-time conversion (DTC) signals, the DTC signals having edges delayed to define time segments in units of a pre-designated time interval from a starting time point at which an impulse signal is emitted;
generating template signals consecutively in a pre-designated number within the time segments in response to the DTC signals, the template signals having a same waveform as the impulse signal;
determining a time segment in which a delayed signal is received by calculating correlations with the consecutively generated template signals, when the delayed signal is received after a delay as the emitted impulse signal is reflected off an object;
determining a time at which the delayed signal is received within the determined time segment from results of calculating correlations between a plurality of template signals within the determined time segment and the delayed signal; and
calculating a total delay duration of the delayed signal from the determined time segment and the time at which the delayed signal is received within the time segment and calculating a distance to a measurement target object from the calculated delay duration,
wherein the determining of the time segment comprises:
calculating correlations between the plurality of template signals generated consecutively in each defined time segment and the delayed signal; and
determining a time segment for which the calculated correlation values are greater than or equal to a pre-designated threshold value,

wherein the determining of the received time comprises:
obtaining a plurality of I template signals and a plurality of Q template signals by applying I/Q modulation to each of the plurality of template signals within the determined time segment; and
calculating correlations between the plurality of I template signals and the plurality of Q template signals and the delayed signal to determine the time at which the delayed signal is received.