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Updated: Sep 3, 2025

Making Precise and Accurate Single-Molecule FRET Measurements using the Open-Source smfBox

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SMU Open-Source Platform for Synchronized Measurements.

Carlo Guarnieri Calò Carducci¹, Marco Pau², Cesar Cazal¹

¹Institute for Automation of Complex Power Systems, RWTH Aachen University, 52074 Aachen, Germany.

Sensors (Basel, Switzerland)

|July 27, 2022

Summary

This summary is machine-generated.

This study introduces a low-cost, open-source platform for CPU-independent data acquisition using single board computers (SBC). The synchronized measurement unit (SMU) offers high accuracy and precise timing for power system applications.

Keywords:

data acquisition systems distributed monitoring low-cost measurement units phasor measurement unit single-board computer synchronized measurements

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Area of Science:

Electrical Engineering
Computer Engineering
Instrumentation

Background:

Single Board Computers (SBCs) offer flexibility but lack deterministic control for industrial data acquisition.
Traditional OS-based systems struggle with hardware interrupts and precise timing, limiting their use in critical applications.
Power systems increasingly require synchronized measurements for grid monitoring and power quality analysis.

Purpose of the Study:

To develop an innovative, versatile, and CPU-independent open-source data acquisition platform.
To address the limitations of OS-based systems in industrial and power system applications.
To introduce a low-cost solution for high-accuracy, synchronized measurements.

Main Methods:

Development of a Synchronized Measurement Unit (SMU) based on SBCs.
Implementation of sub-microsecond synchronization to a GPS time reference.
Characterization of the SMU's measurement accuracy, bandwidth, SNR, and THD.

Main Results:

The SMU achieves multichannel simultaneous sampling up to 200 kS/s.
It demonstrates high accuracy with low offset/gain errors, bandwidth > 20 kHz, SNR > 90 dB, and THD < -110 dB.
Time synchronization precision is within sub-microseconds to a GPS reference.

Conclusions:

The proposed SBC-based SMU platform provides a viable solution for reliable data acquisition in OS environments.
The device's performance meets the stringent requirements for synchrophasor-based applications in power systems.
This low-cost platform enables advanced, geographically distributed monitoring of grid conditions and power quality.