Metropolia Signals Box
Schneider, Lars Georg (2018)
Metropolia Ammattikorkeakoulu
2018
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Julkaisun pysyvä osoite on
https://urn.fi/URN:NBN:fi:amk-2018082014585
https://urn.fi/URN:NBN:fi:amk-2018082014585
Tiivistelmä
The goal of this thesis was to develop a prototype of the Metropolia Signals Box which can measure several different biosignals through their corresponding potential difference between two electrodes. The signals should then be processed, stored and wirelessly transmitted. In general, this box should serve research and educational purposes.
As a basis of this application the Cyton biosensing board by OpenBCI was examined. The result was that this board covers nearly all required specifications for the Metropolia Signal Box. It can measure EEG, ECG, EOG and EMG signals, amplify and filter as well as store and transmit them. Additionally, it features an accelerometer.
In addition to the features already existing in the OpenBCI GUI, the possibility of temperature measurement was added. For this purpose an already existing part of the GUI was altered, so that it not only reads analog voltage, but converts it directly into the temperature. Two temperature sensors, one providing directly an analog voltage and a NTC thermistor, were used. With the first sensor the temperature can be measured with an accuracy of 1°C, and with the second one it was possible to improve the accuracy to 0.1°C.
As a basis of this application the Cyton biosensing board by OpenBCI was examined. The result was that this board covers nearly all required specifications for the Metropolia Signal Box. It can measure EEG, ECG, EOG and EMG signals, amplify and filter as well as store and transmit them. Additionally, it features an accelerometer.
In addition to the features already existing in the OpenBCI GUI, the possibility of temperature measurement was added. For this purpose an already existing part of the GUI was altered, so that it not only reads analog voltage, but converts it directly into the temperature. Two temperature sensors, one providing directly an analog voltage and a NTC thermistor, were used. With the first sensor the temperature can be measured with an accuracy of 1°C, and with the second one it was possible to improve the accuracy to 0.1°C.