OPERATING EXPERIENCE OF OPTICAL-DIGITAL SYSTEMS FOR MEASURING THE CAPILLARY CHARACTERISTICS OF MATERIALS

We analyzed the well-known optical-digital systems of optical nondestructive testing and measurement of the capillary characteristics of materials by the method of sessile drop. We show that the parameters and operating modes of such systems should be optimized. We consider a model and created a breadboard on its basis. By using the breadboard, we investigated optical and electronic noises of the system and the other sources of measurement errors of the geometric parameters of a drop image. The results allow one to optimize the parameters of the system in such a way that the measurement errors of the capillary characteristics should be minimum.