Title
Date
Need
The platform in use (a social robot) includes a MiniPC for data processing. Within one of the research lines, microphones are used as sensors to detect hand gestures performed directly on the robot’s surface. These signals make it possible to distinguish between different types of physical interaction, such as taps, presses, or sliding movements, based on the characteristics of the captured vibrations.
For this reason, a simple, reliable, and flexible method is required to connect surface or piezoelectric microphones to the system, enabling accurate acquisition of contact-related data without adding complexity to the hardware setup.
Purpose
To design an electronic board that converts the signal captured by the piezoelectric sensor into a USB-compatible signal, incorporating the necessary signal conditioning to ensure proper amplification, filtering, and reliable data acquisition.
Requirements
Form factor defined by the diameter of the piezoelectric sensor, with a circular shape and the smallest possible height to ensure a compact profile.
Support for audio signal frequencies generated by user interaction with the surface on which the microphone is mounted.
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Implemented Solution
Design of an audio acquisition board using Altium Designer.
