Hey guys,
i had a closer look into the calibration of EMG and ECG signals to
derive a formula that converts ECG output to measurements in mV. Here is
what i found:
ECG:
Offset (optimal): 2048
Gain factor (data sheet): 175
ADC range: 3.0V (fullscale, -1.5V to +1.5V)
Measurement_in_mV = [ ( ADC range / 4095 ) * ( Measurement_from_ADC -
Offset) ] / Gain factor
EMG:
Offset (optimal): 2048
Gain factor (data sheet): 682
ADC range: 3.0V (fullscale, -1.5V to +1.5V)
Measurement_in_mV = [ ( ADC range / 4095 ) * ( Measurement_from_ADC -
Offset) ] / Gain factor
As shown in the Youtube videos, offset and gain can be corrected
accordingly. Can you please confirm that i am correct or provide any
explanation if i am wrong!
Cheers,
Ulf
--
Dipl.-Inf. Ulf Jensen
Digital Sports Group
Pattern Recognition Lab
Friedrich-Alexander-University Erlangen-Nuremberg
Haberstr. 2, 91058 Erlangen, Germany
Phone: +49 (0)9131 / 85-27890
E-Mail: [email protected]
Web: www5.informatik.uni-erlangen.de/~jensen
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