METHOD OF MEASURING LEVEL OF LIQUID AND LEVEL OF LIQUID SIGNALING DEVICE Russian patent published in 2007 - IPC G01F23/22 

FIELD: measuring technique; oil industry; chemical industry.

SUBSTANCE: method can be used for checking level of liquid in reservoirs, for example, at petrol stations. At least one measuring bar is placed in container; there are marks applied onto measuring bar. Image of measuring bar is transmitted by means of TV camera fixed to float (water-proof case of camera can be also made in form of float) through TV signal transmission channel to TV image introducing device and digital computing device, where calculation of level of liquid is performed on the base of digital representation of received original image. Float of waterproof case of TV camera made in form of float is capable of free movement in vertical direction when level of liquid changes. Signal received by TV camera does not depend on position (warps) of float as determination of level of liquid is performed on base of image of glowing areas on surface of light guide, which areas are disposed within field of view of camera. To perceive information, camera needs a small highlight, as camera is located close to measuring bar. When using light guides as measuring bars, highlighting is not required. Precision of result of measurement if defined by technological abilities of microscopic roughness application only with specified pitch onto surface of core of light guide and by resolution of chamber.

EFFECT: very high precision.

9 cl