The block diagram of the human heart rate detection device is shown in the figure. The core of the block diagram is the single chip AT89C2051. The pulse signal is collected by the photoelectric sensor. After the preamplifier circuit, the filter circuit, the integral circuit and the comparison circuit, the pulse signal related to the pulse is obtained. The pulse signal is sent as an interrupt signal to the pulse period of the single chip microcomputer. Calculation.
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