Investigation And Regulation Of Microenvironment Temperature Field Between Human Body And Seat Contact Surface

With the social and economic development,comfortable office and living appliances are also the daily necessities of people,while the seats are the most used daily supplies for healthy workers in all industries and even for people with mobility problems and disabilities.The overall thermal comfort of the seat directly affects the user’s mood,working efficiency and even skin health,while the micro-environmental temperature field of the contact surface of the seat is the direct factor of the seat’s own thermal comfort.Therefore,the investigation and regulation of the micro-environmental temperature field between human body and seat contact surface has practical significance.In this paper,by understanding the domestic and international situation of this topic,it is found that the actual problems in working life have not been solved properly.The data acquisition system based on ATMEL and DS18B20 sensor is used to obtain the microambient temperature data of human seat contact surface.EEMD algorithm is used to denoise the data.Then by using MATLAB we draw 2D color color map to show and analyze the data.After that we reasonably projected temperature change and analysis temperature filed by setting up a more accurate temperature prediction model which is called ARIMA model.At last,the temperature control system is added to regulate the microambient temperature of the contact surface of the human seat.At the same time it is necessary to verify the actual effect of temperature field regulation and whether the actual problems are solved.The experimental results show that EEMD algorithm can effectively reduce polluted data by separating noise and signal.The temperature prediction model ARIMA shows that its error range is about 0℃~0.5℃ by analyzing errors between multiple sets of experimental data and measurement data.The comparison experiment before and after the control shows that the control system cooling down about 2.5℃ for the permeability material seat.In conclusion,the EEMD algorithm is reasonable,ARIMA model is reliable,and the control system is effective.So the seat’s thermal comfort can be improved and the system can to some extent reduce the incidence of bedsore skin diseases caused by accumulated humidity and heat at the body-seat interface.