Universal single-board computer based control unit for biomedical test benches

Continuous adaptation of international standards for medical devices requires recurrent modification of test benches. A universal control unit using an open software environment is presented to simplify the maintenance of various test benches. Our developed control unit is equipped with a Raspberry...

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Bibliographic Details
Published in:Current directions in biomedical engineering 2021-10, Vol.7 (2), p.629-632
Main Authors: Rhinow, Grit, Tautorat, Carsten, Grossmann, Swen, Grabow, Niels, Siewert, Stefan, Schmitz, Klaus-Peter, Schmidt, Wolfram
Format: Article
Language:English
Subjects:
automation
Biomedical
embedded system
Node-RED
Raspberry Pi
testing
Online Access:Get full text
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Summary:Continuous adaptation of international standards for medical devices requires recurrent modification of test benches. A universal control unit using an open software environment is presented to simplify the maintenance of various test benches. Our developed control unit is equipped with a Raspberry Pi 4, with standard communication interfaces and application-specific electronic assemblies. The software is based on Node-RED, a browser-based editor. A measuring setup was adapted for a flow perfusion system. Our control unit simplifies the handling of the flow perfusion system by controlling a hydraulic pump and all required valves. A software programmed PID algorithm adapts the speed of the pump to adjust the pressure automatically. Actuators like proportional pinch valves are handled to control volumetric flow and pressure within the circulation. Consequently, the user directly observes changes inside the system. The measured data are stored and are available for documentation.
ISSN:2364-5504
2364-5504
DOI:10.1515/cdbme-2021-2160