Measuring Fabric Moisture Content with Improved Wheatstone Bridge

Abstract

Use of improved Wheatstone bridge in measurement of fabric moisture content as well as its measurement principle is introduced in this paper. A new detection circuit of fabric moisture content based on improved Wheatstone bridge is designed, and its measurement result is standardized by oven method. The fitted curves representing fabric moisture content of different materials are plotted after the experimental data is processed. Compared with oven method, errors are analyzed. The results reveal that the detection circuit can accurately measure the changes in fabric moisture content and errors are small (within 1% for cotton), which can meet the need of fabric moisture content detection online system.