Vision sensor for precise control of the pneumatic heart assist pump
Krzysztof Murawski, Wojciech Sulej · 2019
The pneumatic type heart assist pump has a pneumatic chamber and a blood chamber separated by a flaccid membrane. By compressing and sucking the gas into the pneumatic chamber, the membrane shape changes as a result the stroke volume will also change. Our task is to determine the real time stroke volume. The idea presented in the work uses shape reconstruction of the membrane created on the basis of image analysis to calculate the stroke volume. This is made possible by equipping the pump with a wide-angle camera and using the DFD method to visually measure the distance between the camera and the characteristic points selected on the surface of the membrane. A new technique was developed based on this for determining the stroke volume of the pneumatic heart assist pump. The work presents a vision sensor for precise control of the pneumatic heart assist pump, as well as results obtained during experimental research.