Design And Study On Flexible Temperature Sensor Based On Breast Cancer Risk Monitoring

Worldwide,the incidence of breast cancer ranks first among female malignant tumors and is often referred to as the "pink killer." In China,the incidence of breast cancer in women is increasing with each passing year,especially in the eastern coastal areas and economically developed cities,and the incidence rate starts to increase year by year after the age of 20 as well.In this reason,modern women need to start breast health management as soon as possible.Medical research shows that temperature is one of the important indicators reflecting the physiological health of breasts,and its changes are closely related to the occurrence of breast cancer.In recent years,the research of smart underwear for breast health monitoring based on temperature is still in the stage of exploration.The hard and rigid sensors used in the smart underwear will affect its wearing comfort and measurement reliability.The development of related products still needs to be further developed to be flexible,intelligent and daily avaliable.This subject is based on the principles and requirements of breast cancer risk monitoring,and explores the design of flexible fabric temperature sensors that can be applied to breast cancer risk monitoring.The main research contents are as follows:(1)Research and sort out the pathology of breast cancer and the principle of breast cancer risk monitoring based on temperature signals,and analyze and summarize the research status of smart underwear and flexible fabric temperature sensors.(2)Pt(platinum)fiber is selected as the temperature-sensitive material,and 4 kinds of clothing yarns of polyester-cotton,pure cotton,wool and nylon are used as the base yarns.Combining different fabric structures,the weaving parameters are designed based on the weaving method.The fiber weaving method produced 8 fabric temperature sensors with 1 cm×1 cm sensing area,which verified the feasibility of fabricating flexible temperature sensors by weaving.(3)The surface morphology,basic physical parameters,air permeability,thermal conductivity,and contact comfort of different fabric sensor samples are compared by wearability tests while the four indicators of linearity,sensitivity,static error and hysteresis of the samples are evaluated through the temperature sensing performance test under simulated conditions.The results show that the resistance value of the 8sensor samples has a good linear relationship with temperature,the goodness of fit is above 0.99,the nonlinear error is less than 5%,and the temperature coefficient is between 0.00327/℃～0.00364/℃,the static relevant error and hysteresis are within 2%and 7.5% respectively.Considering the wearability and temperature-sensing performance test results,the fabric temperature sensor made of pure cotton yarn and satin weave has better comprehensive performance.On this basis,the influence of yarn types,organization structure,outer layer structure and pressure conditions on the temperature sensing performance of fabric temperature sensors is further explored.(4)Based on relevant design theories and market and patent research and analysis,summarize the design elements of multi-point monitoring fabric temperature sensor,design and explore from the aspects of style structure,fabric structure,weaving parameters and circuit connections,and integrate multiple sensing units on one same fabric base of the bra-cup structure.The performance of multi-point monitoring fabric temperature sensor is tested,the results show that measured resistance value has a good linear relationship with the temperature,and a temperature prediction model based on the resistance value is established.(5)According to the breast cancer risk monitoring requirements,a minimum warning system based on single-chip microcomputer was designed,and simulation experiments were performed to verify the rationality and feasibility of the early warning system design.Through the wearing experiment,the multi-point monitoring fabric temperature sensor is applied to the real-time measurement of breast temperature,and its reliability in breast cancer risk monitoring applications is explored from the aspects of stability and accuracy,and combined with subjective evaluation experiments,the comfort and practicality of the sensor are evaluated.This subject explores the design of a flexible fabric temperature sensor,and finally weaving a multi-point monitoring fabric temperature sensor that is soft,breathable and has good wearing comfort,which can real-time monitor the breast temperature in a relatively stable and accurate way.Exploring the application of flexible fabric sensor on breast cancer risk monitoring based on temperature signals provides ideas and directions for the flexible improvement of breast cancer risk monitoring related products.