Wireless Electromyograph
This project implements a wireless surface electromyograph that displays the signal using a television as an oscilloscope.
Electromyography detects the electrical signals that the human body generates to contract muscles. Detecting very low voltages in the milliVolt range on the skin surface is not a trivial task. As shown in figure 1, EMG signals are inherently low frequency signals. The human body is a great antenna and filtering out RF and 60Hz power system noise is essential to observing the EMG signal. The course safety requirement for the final projects required that any human body connection be electrically isolated from the 120V power grid. Thus, the human side of the system must be powered using 9V batteries. Converting the analog EMG signal to digital and transmitting using a wireless transmission protocol was an effective way to electrically isolate the human. The transmitted EMG data was displayed on a television we setup to be a virtual oscilloscope.
Link: http://instruct1.cit.cornell.edu/courses/e...site/index.html
This project implements a wireless surface electromyograph that displays the signal using a television as an oscilloscope.
Electromyography detects the electrical signals that the human body generates to contract muscles. Detecting very low voltages in the milliVolt range on the skin surface is not a trivial task. As shown in figure 1, EMG signals are inherently low frequency signals. The human body is a great antenna and filtering out RF and 60Hz power system noise is essential to observing the EMG signal. The course safety requirement for the final projects required that any human body connection be electrically isolated from the 120V power grid. Thus, the human side of the system must be powered using 9V batteries. Converting the analog EMG signal to digital and transmitting using a wireless transmission protocol was an effective way to electrically isolate the human. The transmitted EMG data was displayed on a television we setup to be a virtual oscilloscope.
Link: http://instruct1.cit.cornell.edu/courses/e...site/index.html