Clothing pressure is an important index to evaluate clothing comfort. Inappropriate clothing pressure will make the wearer feel uncomfortable, affecting the work efficiency and health of the human body. Therefore, the measurement and distribution of clothing pressure play an important role in the comfort of clothing pressure. Starting from the concept and generation of clothing pressure, the theoretical research of clothing pressure is summarized, including the impact of contact mechanics mechanism, human body shape and different clothing on human body pressure. From the direct measurement method and indirect measurement method, the measurement method and principle of clothing pressure are analyzed respectively. The research status of measurement of clothing pressure by sensor method and soft mannequin method is introduced. The problems of garment pressure measurement are pointed out, and the future direction of garment pressure research is forecasted. the pressure is verified experimentally by using fiber Bragg grating sensor. The sensor has the advantages of simple structure and good measurement accuracy. The results show that the sensor has good sensitivity and linearity, which is suitable for garment pressure testing environment and has a good development prospect.
A separation technique for phase-shifted fiber Bragg grating(PS-FBG) physical parameters and spatial stresses based on Random-Elite Differential Evolution(RE-DE) algorithm was proposed. The cross-sensitivity problem of parameter to be measured was transformed into parameter identification of non-linear system. The specific methods adopted were as follows: measured the PS-FBG reflection spectrum under the free state as well as under different loads; constructed a theoretical PS-FBG reflection spectrum under these two states according to transfer matrix theory; established an identification model based on the difference degree between theoretical spectrum and experimental one and use RE-DE algorithm to solve the problem. Experiments showed that the proposed method had relative high identification accuracy and provided an convenient method for optical fiber parameter recognition and spatial stresses decoupling of PS-FBG.
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