heart beat human

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heart beat human

Postby luq1988 » Wed Sep 15, 2010 4:13 pm

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

Postby yonghui » Thu Sep 16, 2010 10:49 am

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
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Re: heart beat human

Postby luq1988 » Thu Sep 23, 2010 11:33 pm

tq for the info..
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Re: heart beat human

Postby anhingus » Sat Sep 25, 2010 9:19 pm

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.
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Re: heart beat human

Postby ober » Sun Sep 26, 2010 10:56 am

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

Postby lordtct » Wed Oct 13, 2010 2:09 am

or, you could use a piezoelectric transducer + op-amp arrangement
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Re: heart beat human

Postby happyrush » Sun Oct 17, 2010 3:21 am

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.
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