MANOMETRY LEAK TEST PLANT OF PRODUCTS WITH CLOSED COVERING Russian patent published in 2016 - IPC G01M3/00 

FIELD: measuring equipment.

SUBSTANCE: invention relates to leakage monitoring of bulk articles. Leak test plant includes a measuring circuit, which consists of two contours. First contour is intended for inspection of articles with high leakage. It includes a three- membranous comparison element, one of chambers of which is connected directly with the measuring chamber, and the other one is connected to threshold signal. Value of threshold signal should be located in the gap between the value of signal when controlling untight item and signal when controlling tight product with maximum volume. Second circuit is intended for inspection of articles with low leakage. It includes a five-membranous comparison element, opposite chambers of which are connected to a measuring chamber, and one of chambers is connected through the valve. At the control mode these chambers are disjoined by giving of a control signal to the valve, as a result, at a leaky product appears a signal about low leakage. Signals from two circuits are integrated by logical element of addition.

EFFECT: technical result of invention is a compensation of error when inspecting articles with closed covering, caused by deviation of volumes of articles within the tolerance of their production.

1 cl, 1 dwg