Design of pulse measuring instrument based on single chip
Abstract ： Pulse measurement apparatus has been widely used in our daily life. In
order to improve the measurement apparatus is simple and accuracy, this paper
designs a pulse measuring instrument based on 51 single chip microcomputer. System
to STC89C52 microcontroller as the core, with photoelectric sensor, and calculates
the internal timer SCM system, the signal from the photoelectric sensor,
microcontroller based on the accumulated pulse beat frequency signal, by the time the
timer. In the running of the system can be observed through the indicator lights out, if
even flicker that accurate measuring value. The system stops running, can display the
total pulse number and time. After testing, the system works normally, meet the
design requirements.
The design of the infrared photoelectric sensor generates a pulse signal, after
plastic surgery to enlarge, the input of SCM within the corresponding control, which
measured within a minute of the pulse beat frequency, fast and convenient. Through
observing the pulse signal, can check the health of the body, usually used for health
centres and hospitals. The system can be used for measuring the pulse number of
users, but also can set the upper limit of the number of times and, when the range of
the measurement range over the set of drive buzzer alarm, but users can also set the
alarm clock to remind the daily measurement, time can be set, the results were finally
able to pulse signal acquisition to display on the LCD1602.occurring.
Keywords：STC89C52; photosensor; LCD display; Pulse measuring instrument
