Next Article in Journal
Membrane Potential and Calcium Dynamics in Beta Cells from Mouse Pancreas Tissue Slices: Theory, Experimentation, and Analysis
Previous Article in Journal
A Monolithic CMOS Magnetic Hall Sensor with High Sensitivity and Linearity Characteristics
Article Menu

Export Article

Open AccessArticle
Sensors 2015, 15(10), 27374-27392; doi:10.3390/s151027374

A Low-Cost Modular Platform for Heterogeneous Data Acquisition with Accurate Interchannel Synchronization

Engineering Department, University of Almería, Ctra. de Sacramento s/n, La Cañada 04120, Spain
*
Author to whom correspondence should be addressed.
Academic Editor: Vittorio M. N. Passaro
Received: 1 August 2015 / Revised: 11 August 2015 / Accepted: 20 October 2015 / Published: 27 October 2015
(This article belongs to the Section Physical Sensors)
View Full-Text   |   Download PDF [5809 KB, uploaded 27 October 2015]   |  

Abstract

Most experimental fields of science and engineering require the use of data acquisition systems (DAQ), devices in charge of sampling and converting electrical signals into digital data and, typically, performing all of the required signal preconditioning. Since commercial DAQ systems are normally focused on specific types of sensors and actuators, systems engineers may need to employ mutually-incompatible hardware from different manufacturers in applications demanding heterogeneous inputs and outputs, such as small-signal analog inputs, differential quadrature rotatory encoders or variable current outputs. A common undesirable side effect of heterogeneous DAQ hardware is the lack of an accurate synchronization between samples captured by each device. To solve such a problem with low-cost hardware, we present a novel modular DAQ architecture comprising a base board and a set of interchangeable modules. Our main design goal is the ability to sample all sources at predictable, fixed sampling frequencies, with a reduced synchronization mismatch (<1 µs) between heterogeneous signal sources. We present experiments in the field of mechanical engineering, illustrating vibration spectrum analyses from piezoelectric accelerometers and, as a novelty in these kinds of experiments, the spectrum of quadrature encoder signals. Part of the design and software will be publicly released online. View Full-Text
Keywords: accelerometers; impact tests; firmware design; microcontroller; open source; quadrature encoders; vibration analysis accelerometers; impact tests; firmware design; microcontroller; open source; quadrature encoders; vibration analysis
Figures

Figure 1

This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

Scifeed alert for new publications

Never miss any articles matching your research from any publisher
  • Get alerts for new papers matching your research
  • Find out the new papers from selected authors
  • Updated daily for 49'000+ journals and 6000+ publishers
  • Define your Scifeed now

SciFeed Share & Cite This Article

MDPI and ACS Style

Blanco-Claraco, J.L.; López-Martínez, J.; Torres-Moreno, J.L.; Giménez-Fernández, A. A Low-Cost Modular Platform for Heterogeneous Data Acquisition with Accurate Interchannel Synchronization. Sensors 2015, 15, 27374-27392.

Show more citation formats Show less citations formats

Related Articles

Article Metrics

Article Access Statistics

1

Comments

[Return to top]
Sensors EISSN 1424-8220 Published by MDPI AG, Basel, Switzerland RSS E-Mail Table of Contents Alert
Back to Top