On this platform, we use C language to implement a BP
measurement program. The flow chart of software is shown
in Fig. 3. Before starting measurement, user can select their
ID by joy stick and then press a start/stop button to initiate the
measurement procedure. First, the pump starts to inflate the
cuff. When CPU detects the pressure value in the cuff is equal
to or bigger than a threshold 1(variable). The pump stops
inflating, and then deflates through deflation gate with
reducing 3mmHg per second until the pressure value is
smaller than a threshold 2 (variable). Finally, CPU controls
the deflation gate to take a complete deflation. In this paper,
we implemented a 101-tap FIR digital low-pass filter with
cut-off frequency of 0.1Hz for reducing the noise of DC cuff
pressure signal to prevent the detection error.
Fig. 3.
On this platform, we use C language to implement a BP
measurement program. The flow chart of software is shown
in Fig. 3. Before starting measurement, user can select their
ID by joy stick and then press a start/stop button to initiate the
measurement procedure. First, the pump starts to inflate the
cuff. When CPU detects the pressure value in the cuff is equal
to or bigger than a threshold 1(variable). The pump stops
inflating, and then deflates through deflation gate with
reducing 3mmHg per second until the pressure value is
smaller than a threshold 2 (variable). Finally, CPU controls
the deflation gate to take a complete deflation. In this paper,
we implemented a 101-tap FIR digital low-pass filter with
cut-off frequency of 0.1Hz for reducing the noise of DC cuff
pressure signal to prevent the detection error.
Fig. 3.
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