Telemetrie biologických veličin

Abstract

This work deals with the issue of measured wireless ECG signal transfer to computer. To data transmission is used wireless communication based on IEEE 802.15.4 standard. It means it works on 2,4 GHz frequency band, precisely in range from 2405 to 2480 MHz. Wireless communication were implemented by modules JN5148 001 M00 from NXP company, because of low consumption (in a transmitting mode 17,5 mA). Modules are programmed to work only as wireless serial port. To read ECG signal, module EMI12 was used. It was developed by Corscince company. EMI12’s consumption is maximally 90 mA. It may read up to 12 leads with different sampling rate (100, 200, 500 and 1000 Hz). Furthermore, the baud rate could be mechanically set on 38 400, 115 200, 230 400 or 921 600 bit / sec. Created software provides user a choice of showing three, six, or twelve leads. All measured values can be saved as .csv file.