Introduction is done to the PXI bus based test system of weft tension of air-jet looms and test of some air-jet looms regarding the specification finds the advantages of the system in quick response,easy programming,reliable,strong anti-interruption,precision test and universal in application in contrast to the conventional one.

It points out that rationally setting weft-related process parameters, reducing weft tension and taking strict control over the quality of filling yarn are effective measures for r.

A VIbased novel method for testing weaving looms' weft tension is given in the paper.

Based on the straight warp and weft threads, combined sine and straight line of the binder yarn, a geometric model of 3D orthogonal fabric structure was established.

In order to measure accurately the weft tensile force and set the reasonable parameters for rapier loom, it established a new test system with the help of microcomputer and sensors, and achieved the measure for weft dynamic tensile force, and used the sys-tem to measure the weft tensile force of different yarns for TT96 rapier loom.