Research On Fabric Type Intelligent Wearable Zero Heat Flux Core Temperature Measuring Instrument

It has very important value in real-time monitoring of core body temperature.The traditional thermometer can not be real-time monitoring,real-time monitoring technology of the existing clinical will usually sensor into the nasal cavity or the anus,or the body sensor wire and the physical contact and the bound will be very uncomfortable.Core body temperature detection technology of zero heat flux measured by the contact type on the surface of the forehead,finally get the core body temperature,different from the forehead temperature measurement is a simple,noninvasive real-time core temperature monitoring technology of new commercial products.Zero heat flux core temperature detection current using foam material,is wearable,however it still has room for improvement.If the main material of the probe can use fabric material,it will be more wearable,and more fit the skin,improve the sense of comfort.Based on this idea,this paper puts forward the development of a wearable fabric type zero heat flux core body temperature measuring instrument.For this purpose,the subject as follows:Firstly,this paper analyzes the design requirements of the system,the intelligent fabric according to the design requirements of the system can wear zero heat flux core body temperature measuring instrument,gives the design scheme of the system,and introduces the system structure and technical means of the design.The design scheme of the probe and the data acquisition and control system,heating the power of separation;direct contact probe and forehead skin,fabric design;data acquisition and control system in view of the professional background,the limited time,determined by the programmable control technology rapid development(PLC)scheme;heating power supply by using the portable mobile power supply.The system needs to capture and control the heating temperature,Through the comparison of two kinds of automatic acquisition and control circuit,the PLC with stable performance and short development period is selected to realize this function.Secondly,according to the overall scheme of the system,the core temperature of fabric type measuring probe is designed in detail,the main components of the probe is a heating layer,insulating layer,wet insulation layer and the outer material of fabric design,combined with the headband,the probe can meet the wearable design.Thirdly,the hardware circuit of the system is designed and implemented.According to the functional requirements of the hardware design,the hardware is selected and the circuit is designed.The design of the hardware circuit is based on the technology of PLC.Then,based on the hardware,design and implementation of the software development.The PLC program,realized the automatic acquisition and control function of temperature;using Wincc flexible 2008 SP4 development configuration interfaces and visualization design requirements for the function.Finally,the debugging and test of the new system.PID control parameters were determined through debugging.With infrared ear thermometer measurement comparison,found that the new system and infrared ear temperature measurement results of the correlation coefficient was0.93139,showed that two kinds of measurement results highly linear correlation.The feasibility and reliability of this system was been proved by the experiment.After the above exploration,initially realized the intelligent fabric R & D of wearable zero heat flux core body temperature measuring instrument.The new system can real-time noninvasive monitoring the core body temperature,abnormal temperature will activate the alarm system,information visualization,fabric type measuring probe soft and wearable.As a new system with PLC it will be not portable,but this topic has laid an important foundation for the future realization of miniaturization.