Implementación y evaluación de dos prototipos basados en tecnologías inalámbricas para la adquisición y procesamiento de señales cardiacas en tiempo real.

Abstract

The aim of the present research work was to implementation and evaluation of two prototypes for the acquisition of real time cardiac signals, the first monitor uses Wi-Fi technology and the latter Bluetooth. The prototype consists of 5 blocks: sensorial, processing, communication, storage and visualization. For the sensorial block, a review of specialized literature allowed to identify the best technique for the acquisition of cardiac pulse. The Wi-Fi device uses an MCU ESP 8266 processing card and the Bluetooth device uses an Arduino Nano development card. The communication for the Bluetooth device will be performed through the HC-06 module and for the Wi-Fi device through the MCU ESP 8266 card. For data storage, a micro SD card will be used. The visualization in the Bluetooth device is carried out through an Android application and in the Wi-Fi device through a wireless network. For both, the Wi-Fi technology and the Bluetooth technology, using the Windows command console, a program was developed in Arduino IDE which works as a sniffer to determine the amount of sent and received packs, with their corresponding delay times. Then, using these data, different performance factors such as: Throughput, package loss, delay average, delivery relationship. The analysis was performed using 30 samples for each technology, considering that a total of 100 data packages per sample. The results show that Wi-Fi technology is 71% superior to Bluetooth generating better benefits. To obtain a better result from the data, it is recommended to collect the same number of samples for both technologies for analysis.