Comprehensive Measurement of Physical Properties of Floating Liquid Film on Large Surface in Test Facility

The object to be measured is the facility for water distribution experiments for CAP1400 which surface area is more than 200m².The high-accuracy capacitance spacing probes are used to get the thickness of the film.Many tanks are located under the facility to measure the levels of these tanks which show the rate of flow along the surface.CCD（Charge-coupled Device） industrial cameras is used to take image of the surface of the test object,and the video is treated by the especial software of machine vision.The coverage rate is obtained by calculating the whole proportion of wet area and dry area.By these new measurement methods,the law of floating liquid film in large space can be understood.