Factors affecting measurement of electrical resistance of loose wool fiber assembly by one-side parallel electrodes

Fiber compression device and a serial of one-side parallel electrodes were used to study the factors affecting the electrical resistance measurement by one-side parallel electrodes so as to improve the design of wool fiber moisture regain tester.Experiment results show that the measuring depth of the loose wool fiber assembly is limited and the falling of measuring resistance is finite with the increasing of the thickness of the loose wool fiber assembly.The resistance decreases with the decrease of the distance between electrodes,and smaller the distance,less the increase margin of resistance;the resistance decreases with the increase of electrode area,and its increase slow down with the increase of area;and the resistance decreases with the decrease of wool fiber volume density.The measuring depth increases with the increase of applied voltage.The voltage of one-side parallel electrodes should be selected as high as possible provided that it dose not cause local breakdown of the loose wool fiber assembly.