Abstract

RODRIGUEZ CORBO, Fidel Alejandro; HERNANDEZ GONZALEZ, Arturo  and  RAMIREZ BELTRAN, Jorge. High precision system for analog data acquisition using a Single Board Computer. EAC [online]. 2018, vol.39, n.3, pp.68-76. ISSN 1815-5928.

The use of single-board computers in the field of continuous analog data acquisition leads to the reduction of manufacturing times, easy implementation and more compact and portable systems. Disadvantages include data loss and temporary errors between samples. Real-time Operating Systems and components external to the system can reduce these errors, but tend to make the project more complex and increase its cost. This work proposes the implementation of a high precision system for continuous analog data acquisition using the BeagleBone Black. The Programmable Real-Time Subsystem, also inside the BeagleBone Black, guarantees the reduction of external components and a high temporal precision, by imposing the sampling frequency of the internal digital to analog converter. In the practical tests carried out, an error of 38 ppm of samples was obtained when using the Programmable Real-Time Subsystem, improving the data losses that occur when managing the sampling frequency from a timer or from software.

Keywords : BeagleBone Black; data acquisition system; single board computer.

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