Flexible Array Pressure Sensing System for Local Temperature Variation of Irregular Objects
To address the problem of the drift of the sensing output of the flexible pressure sensor array when measuring pressure on the surface of irregularly shaped and locally warmed objects,a compensation method for non-contact acquisition of temperature and depth in-formation of the flexible pressure sensor array using an infrared camera and a depth camera is proposed.The fitting method is adopted to identify the transformation function of bending strain characteristics and temperature-sensitive characteristics of flexible pressure sensor array sensing unit under different pressures.The compensation results show that after the joint compensation of bending strain and tem-perature,the maximum relative error of the output resistance value of 64 sensing units of the flexible sensor array is reduced from 85.48%to 9.23%,and the relative error of 59 sensing units is less than 0.5%.The compensation approach meets the accuracy require-ment of this system.
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