Implementación de un simulador de señales fisiológicas para el laboratorio de Neurociencias y Bioingeniería

Abstract

CONDITION FOR PUBLICATION OF PROJECT. This project develops a portable physiological signal simulator for training in biomedical signal acquisition and processing, addressing the need for accessible educational tools in health training institutions. The objective is to implement a device that generates ECG, EMG, and PPG signals with configurable pathological conditions through tactile visualization and analog outputs for acquisition equipment. An ESP32-WROOM-32 microcontroller with 2 kHz sampling frequency, validated mathematical models, a 7-inch Nextion display, and an 8-bit DAC converter with BNC connectors were employed. The prototype was manufactured using PETG additive manufacturing, integrating a power system with autonomy exceeding 5 hours. Spectral validation achieved fidelity above 99% through FFT analysis, confirming characteristic morphologies of simulated pathologies. The device enables WiFi wireless transmission to four simultaneous clients through a web application with real-time visualization at 60 fps. The BioSignalSimulator Pro represents an economically viable and accessible alternative to commercial simulators, maintaining competitive technical characteristics. It is concluded that the system demonstrates the feasibility of developing quality educational biomedical technology with limited resources, democratizing learning in physiological signal processing within the Ecuadorian educational context. Keywords: Biosimulator, ESP32, Electrocardiography, Electromyography, Photoplethysmography