Non-contact fiber permeability measurement system and method

Abstract

The invention discloses a non-contact fiber permeability measurement system and method. The non-contact fiber permeability measurement system comprises a mold device, a fluid supply device, a capacitance detection device and a permeability conversion device. The mold device comprises an upper plate, a lower plate and a fluid input port. The lower plate is arranged below the upper plate in paralleland forms an accommodating space with the upper plate. The accommodating space is used for accommodating a fiber fabric to be tested, and the fiber fabric to be tested is insulated from the upper plate and the lower plate. The fluid input port penetrates through the upper plate. The fluid supply device is connected with the mold device and used for supplying fluid to be injected into the accommodating space through the fluid input port. The capacitance detection device is electrically connected with the outer surface of the upper plate and the outer surface of the lower plate and used for detecting the capacitance value of the accommodating space. The permeability conversion device is electrically connected with the capacitance detection device, receives the capacitance value and is usedfor converting the capacitance value into permeability. Therefore, the non-contact fiber permeability measurement system can be widely applied and can be used for measuring more kinds of fiber fabrics.

Description

technical field [0001] The disclosure relates to a fiber permeability measurement system and its method, in particular to a non-contact fiber permeability measurement system and its method. Background technique [0002] In recent years, with the vigorous development of the high-performance composite material industry, fiber fabric-reinforced resin-based composite materials have been widely used in military applications, vehicles, electronic products, building materials and other fields. Among fiber fabric reinforced resin-based composite materials, resin transfer molding (Resin Transfer Molding, RTM) has been widely researched and applied because of its low cost and excellent product comprehensive performance. In the RTM process, the ratio of the permeability to porosity of the fiber prefabric is the key factor affecting the flow. [0003] For the method of measuring permeability, many kinds of measurement systems have been developed, and the resin flow process control equa...

AI Technical Summary

Problems solved by technology

The current technology uses a high-speed camera to record the wave front of the fluid flow, but it is difficult to distinguish the wave front of the resin flow when the fiber pre-fabric is placed in a non-transparent mold or the color of the fluid is similar to the fiber pre-fabric

In addition, in a contact measurement system, if a conductive fiber such as carbon fiber is used as a material, capacitance cannot be generated due to the conduction between the capacitance strip and the electrode, which causes application limitations.

Images