A volume flowmeter for medical ventilators based on OsciJet Technology.
Please note that this is work in progress and may undergo heavy changes
The purpose of this project is to provide a precise and cost effective volume flow meter for medical ventilators. It is intended to be used free of charge for DIY and other non-commercial projects. We intentionally used a nozzle that is patented, so that the technology cannot be charged or patented by a troll. The device consists of two parts, a hardware part consisting of the device itself and a microcontroller with a microphone, and a firmware for the microcontroller.
In brief, the idea is that when the device is fed with air it creates a flow instability in its interior. The frequeny of this flow instability is linearly linked to the volume flow. By capturing the oscillation through using a microcontroller with a microphone the volume flow can be determined.
upcoming: Read more in the wiki or at fdx.de.
In the hardware folder you will find the geometry in a CAD file format which can be used to 3D print the device.
upcoming
- Visual Studio Code - The IDE used
- Platform.io - The extension for VSC to compile and upload the firmware
Please contact us directly if you want to contribute.
- Thorge Schweitzer - Initial work
- Oliver Krüger - Initial work
The FDX logo is a registered trademark of the Fluid Dynamix GmbH. Despite the logo, the further content of this project itself is licensed under the Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License, and the source code for the firmware is used in this project is licensed under the GNU GPL Version 3.
Please note: The hardware device is patented by FDX Fluid Dynamix GmbH. The unaltered device may be used free of charge for non-commercial use in medical ventilators. For commercial use please contact us via email info@fdx.de or any other channel found at our website www.fdx.de.
- Hat tip to Cubicure GmbH for supporting the project.
- Many thanks to the DIYBeatmungsgerät Project