The paper presents the construction and the use of a video sensor developed for measuring liquid volume. A characteristic feature of the device is liquid volume measurement carried out based on digital image processing. The paper presents the results of a sensor calibration and measurements taken during the tests. The tests have been specially prepared to use the sensor to control the value of the ventricular assist device stroke volume. It has been shown that the sensor developed by the authors is equipped with a flat, floating membrane that allows measuring the stroke volume in the range of 0 to 80 ml.
The article presents the results of optimizing an illuminator structure, which is an integral part of the optical sensor, for determining the stroke volume and cardiac output of the extracorporeal pulsating heart prosthesis supporting the operation of the myocardium. The obtained results of the optimization were verified experimentally. The tests were carried out for various light sources. The following were taken into account: low and high-current LED diodes operating in the visible band, LED diodes operating in the near-infrared range and fiber optics. In addition to the results of the study, the paper presents problems arising during the use of particular types of illuminators and proposed ways to overcome them.
The article presents the construction off a non-contact integrated optical sensor for property protection, with particular emphasis on artwork. The optical sensor described in the paper represents thee programmable and non-contact optical device designed based on a miniature video camera. The video camera used in the sensor was integrated with a high-speed video processing unit. In dangerous situations (during movement of artwork), the sensor generates an alert signal. Object movement is detected based on analysis of variability of a small part of the image of the artwork, which is remembered only inside the sensor during the arming procedure. The described optical sensor determines object movement inn 3D space with the use of a dedicated camera, hardware image processing unit and laser illuminator. The alert signal can be sent to any end point device using Ethernet infrastructures, GSSM or local wireless communication.