PROCEDURE ESTABLISHING GAS LEAKAGE FROM GAS MAINS BY AIRBORNE DIAGNOSTIC SYSTEMS AND BED MODELING GAS LEAKAGE Russian patent published in 2003 - IPC

FIELD: diagnostic technology. SUBSTANCE: invention is intended for control over condition of gas mains, can be used in aviation to increase authenticity of detection of gas leakage as well as under conditions of restricted visibility. Invention is aimed at formation of reference images of thermal fields in points of gas leakage by way of physical modeling of real processes, at comparison of thermal fields generated during monitoring of gas mains with them to identify leakage. This is achieved by measurement of infrared radiation of surface under pipe-line. Field of temperature contrasts is formed, field of temperature contrast is visualized on board the flying aircraft. Then in process of visualization images of fields of temperature contrasts are compared in turn with reference images obtained beforehand in the course of modeling of various gas leakage occurring under different climatic conditions on various underlying surfaces, grounds, during blasting of heated compressed air through pipes with standard holes while measuring air flow rate through hole and ground temperature. After this conclusion on presence of leakage is made. Bed modeling gas leakage includes section of pipe-line and device to supply gas. Section of pipe-line is located under layer of ground, has cuts-out along and over perimeter of pipe circumference, includes inserts with standard holes made fast in cuts-out of pipe-line. Each standard hole is connected to device that supplies gas through controllable gas pressure regulator. EFFECT: enhanced authenticity and informativity of detection of gas leakage under conditions of restricted visibility. 2 cl, 2 dwg