Signal conditioning for long biographical surface biopotentials with dry surface electrodes.
DOI:
https://doi.org/10.29105/mdi.v11i17.303Keywords:
Operational amplifier, Instrumentation amplifier, Dry muscle sensor, Biopotentials, Amplifier for Biopotentials, Surface electromyography, Second order active filtersAbstract
The development of this work consists in the realization of an electronic board with active circuits, mainly operational amplifiers with FET inputs and instrumentation amplifiers, all low energy consumption, configured to capture the signals produced by the long muscles of the extremities of upper part of the human body. There is not a measurement board for biopotentials on the market that contains a preamplifier that contains a virtual ground for electrical protection for the user, as well as an 80-300 Hertz bandpass filter, a 60 Hertz band reject filter, and a signal smoother. This electromyographic signal conditioning card with dry electrodes can measure the intensity of muscle contraction, delivering a designation voltage signal proportional to muscle effort, and will help us measure the upper limbs when driving impact tools in repetitive jobs, in the risk assessment study of metalworking companies.
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