Patent ID: 11918387
Assignee: ORIENTAL SYSTEM TECHNOLOGY INC.
Field: Medical technology (Instruments)
Classification: CPC A  G | IPC A  G

Claim 2:
3. The infant care apparatus according to claim 1, wherein the piezoelectric sensor includes:
a piezoelectric element, made of polyvinylidene fluoride (PVDF), used to detect physical value variations caused by respirations or heartbeats of the care recipient, and outputting a corresponding electronic signal;
a charge amplifier, electrically connected with the piezoelectric element, and converting the electronic signal output by the piezoelectric element into a voltage signal;
an analog-to-digital converter, electrically connected with the charge amplifier, and converting the voltage signal output by the charge amplifier into a digital signal;
a digital filter, electrically connected with the analog-to-digital converter, and limiting a frequency domain range of the digital signal;
a respiratory rate analyzer, electrically connected with the digital filter, and analyzing the respiratory rate of the care recipient according to the digital signal;
a heart rate analyzer, electrically connected with the digital filter, and analyzing the heart rate of the care recipient according to the digital signal; and
an abnormality analyzer, electrically connected with the respiratory rate analyzer and the heart rate analyzer, determining whether the respiratory rate and the heart rate of the care recipient is abnormal, and outputting the corresponding first sensation signal.