Design and Development of an Emergency BVM-Based Ventilator with 2D Look-up Table Control Algorithm

Document Type : Research Paper


1 Mechanical Engineering Department, Engineering Faculty, Tarbiat Modares University, Tehran, Iran

2 Assistant Professor, Department of Mechanical Engineering, Tarbiat Modares University, Tehran, Iran.


Since the outbreak of Covid-19 in 2019, the number of people suffering from respiratory diseases has not only internationally increased sharply but also the situation for other patients altered severely; therefore, the demand for inexpensive, portable, and utile ventilation medical devices with a high production rate increased and this need must have been met apace especially in less developed and deprived areas. This fact accordingly concerned academics which led to numerous design concepts with different mechanisms. By hiring a multiple criteria decision-making procedure (TOPSIS); we were able to choose the mechanism which meets requirements of our preference criteria. A dual rack and pinion mechanism provided the possibility of mechanical Ambu-bag based ventilation at any specified rate, and a 2-D look-up table-based control algorithm was applied to this work-developed system which takes the advantage of DC motor’s rotational encoder elimination. The calibration procedure and test results are also brought into detail.


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