Diseño e implementación de una red WSN, para el control de eventos físicos a traves de señales cerebrales como ayuda a personas con capacidades físicas limitadas.

Abstract

This work aimed at designing and implementing a wireless sensor network (WSN) to control physical activities through brain signals for people with physical disabilities. To design the network, it was necessary to investigate about transmission and reception devices meeting the network requirements: robustness, flexibility, and low costs. The design of the wireless communication network is capable of capturing brain waves and transforming them into signals. These movements are registered and related to three software in sequence. In the acquisition stage, the training software called Control Panel Xavier (CPX) ensures the communication status of seven electrodes. The second software, Mind Yours OSC (MYOSC) receives and sends data in OSC packages when treating the signal. The third software, Processing collects data through the electronic device (sensors). The system communication stage comprises three sensor nodes working under the Message Queue Telemetry Transport (MQTT) that permits to carry out four physical activities. The test results showed that the first node connects the computer in two milliseconds and the second and the third nodes connect to the computer in three milliseconds. WSN features an efficiency evaluated in three aspects: bandwidth of 10.93 Mbps, delay time of 0.27 ms and loss of packages of 0.57% above 1%, which is ideal for the quality of service. The training software is 27.88%, which depends on the person’s training with an average response time of 15.46 seconds to carry out a physical activity. It is concluded that WSN shows scalability so that more activities can be carried out in the future. It is recommended to use microcomputers according to network needs.