METHOD FOR LEAKAGE DETECTION Russian patent published in 2012 - IPC G01M3/00 

FIELD: test engineering.

SUBSTANCE: product is positioned in the accumulation unit, the initial control gas concentration is measured with the control gas sensor, then the product is filled with control gas until manometric testing pressure, the product withstands the said pressure for a given period of time. The resulting control gas concentration is measured in the accumulation unit with the control gas sensor and the leakage is determined according to the difference between the initial and the resulting control gas concentration in the accumulation unit, furthermore, after placing the product into the accumulation unit, a portion of control gas is added into the unit before measuring the initial control gas concentration. The increase of concentration after the portion of control gas is added is measured, and a time lag is introduced to assess the ventilation of the accumulation unit. After the time lag the increase of concentration is measured again, the ventilation rate of the accumulation unit is assessed based on the initial and resulting increase of control gas concentration and the length of the time lag, The ventilation rate is calculated according to the mathematical formula given in the claims of invention. The product leakage is determined by the difference between the resulting and initial control gas concentration, considering the ventilation rate of the accumulator unit, and is calculated according to another mathematical formula given in the claims of invention.

EFFECT: control accuracy improvement.

1 dwg