G - Physics – 06 – F
Patent
G - Physics
06
F
G06F 17/14 (2006.01) A61B 5/02 (2006.01) A61B 5/0245 (2006.01) A61B 5/11 (2006.01) G06F 3/05 (2006.01) H03K 9/00 (2006.01)
Patent
CA 2444149
A pulse wave detecting apparatus is provided which is capable of accurately measuring a pulse rate, even with a calculation unit having low calculating capability. An A-D conversion circuit samples a pulse wave detected by a pulse wave sensor at 16 Hz to perform A-D conversion of the same and sequentially outputs resultant signals to a modified moving average process circuit. The modified moving average process circuit sequentially averages two of the signals from the A-D conversion circuit without duplication and outputs signals at 8 Hz, and an FFT circuit performs Fourier transform on signals obtained through the averaging. Another A-D conversion circuit samples kinetic noises detected by an acceleration sensor at 8 Hz to perform A-D conversion of the same and sequentially outputs resultant signals to another FFT circuit, and the FFT circuit performs Fourier transform on the input signals. A pulse rate calculation circuit obtains differences between the signals output by the FFT circuits to calculate a pulse rate. The pulse rate is displayed by a display section.
Borden Ladner Gervais Llp
Seiko Instruments Inc.
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