Measuring method and measuring system of in-plane permeability of fabrics

The invention relates to a measuring method and measuring system of in-plane permeability of fabrics, and a method for measuring the in-plane permeability of fabrics by using the system. The measuring system comprises an air compressor, a pressure regulating valve, a liquid storage tank, valves, a pressure meter, a camera, a lower mold, an upper mold, a metal reinforced frame, bolts and the like. In the experimentation process, the total thickness of the fabric after matching the molds is controlled by adding different specifications of feeler gauges between the upper and lower molds, and the pressure regulating valve is used for regulation to obtain different injection pressures. The air compressor is utilized to provide the injection pressure of 0.1-0.2 MPa for the fabric permeability measurement, and the in-plane permeability of the fabric is calculated by shooting and recording the flow front edge position at different times, thereby measuring the in-plane permeability of fabrics with different thicknesse