Sistema de bajo ruido para la adquisición sincronizada e inalámbrica de señales de ruido ambiente en redes de sensores sísmicos

The invention relates to a low-noise system for synchronously and wirelessly acquiring ambient noise signals in seismic sensor networks of the type formed by a series of nodes with seismic sample collection sensors connected to a central server. Each node has a microcontroller that is wirelessly connected to the server, having sliding windows to send the samples, and it has a signal conditioning circuit made up of a voltage conversion module, an instrumentation amplifier that converts the differential signal of each seismic sensor into an amplified ground signal, such that the reference signal is fixed at half the maximum supply voltage provided by the voltage conversion module, and a low-pass anti-aliasing filter with a cut-off frequency controlled by a clock signal emitted by the microcontroller.