Patent ID: 11957455
Assignee: CASIO COMPUTER CO., LTD.
Field: Medical technology (Instruments)
Classification: CPC A | IPC A

Claim 6:
7. A bioinformation acquiring method comprising:
receiving a ballistocardiogram waveform, detected by a sensor, the ballistocardiogram waveform including at least a first waveform resulting from heartbeats and a second waveform resulting from eigenfrequency of a body, the second waveform having a shorter cycle than the first waveform;
extracting provisional heartbeat timings from the ballistocardiogram waveform from a first time window having a focused timing while shifting the focused timing of the first time window along the ballistocardiogram waveform in a time axis direction;
acquiring corrective peak timings from the ballistocardiogram waveform from a second time window having a focused timing while shifting the focused timing of the second time window having a duration shorter than a duration of the first time window, and the duration of the second time window being equal to or smaller than an inverse of the eigenfrequency of the body;
calculating an adjacent heartbeat interval difference for each of the provisional heartbeat timings, the adjacent heartbeat interval difference indicating a level of deviation between a previous interval and a subsequent interval, the previous interval indicating a period from a previous provisional heartbeat timing immediately before the each of the provisional heartbeat timing to the each of the provisional heartbeat timing, and the subsequent interval indicating a period from the each of the provisional heartbeat timing to a subsequent provisional heartbeat timing immediately after the each of the provisional heartbeat timing;
correcting the provisional heartbeat timings into definitive heartbeat timings by adding a new provisional heartbeat timing at a timing of one of the corrective peak timings and/or deleting one of the provisional heartbeat timings so as to reduce the adjacent heartbeat interval difference; and
acquiring heartbeat intervals based on the definitive heartbeat timings.