Cytron Technical Forum

what kind of sensor is used to detect heart beat human??

hi,

what kind of sensor is used to detect heart beat human??

i got heard of using Infrared sensors, try to search for it




regards,
yh

tq for the info..

withe an infrared transmitter/receiver pair feeding a 741 opamp or whatever. shape the input with a schmitt trigger for pulse counting.

as i recall, this rig is called a pulse plethysmometer.

since this works on reflected infrared, sticking a finger between source and receiver does not do well. try mounting the ir pair at 90 degrees.

the infrared beam ends up modulated by the expansion and contraction of blood vessels due to heartbeat.

you could also use a microphone or a small speaker and go by sound or possibly a flex sensor or ultrasound or . . . lots of possibilities.

You could also try to take a look at this, the Polar Heart Rate Monitor from Sparkfun. Might be suitable for your requirement.

or, you could use a piezoelectric transducer + op-amp arrangement

Hi there ,

You are playing ECG?Heart beat can measure from finger as well.Here is the full project,if you want,you can follow the link:http://www.stm32circle.com/projects/project.php?id=31


No sensor require, just TWO copper plate.