Design Platform And Realization Of Human Physiological Parameters

With the improvement of living standards,rate of obesity is increasing.Long-term obesity may cause a wide range of diseases such as diabetes and cardiovascular.Although many people who lack exercise are not overweight,the amount of their muscles is too low to keep them far away from sub health problems,Therefor,it is meaningful for us to make an equipment which can not only measure our weight,but also our body fat,muscle amount,bone content,basal metabolic rate and other information.This paper designs a physiological parameter measuring instrument which has a self-developed 32-bit MIPS MCU.It is based on the needs of IP design,so it can remove the module that is not needed,in this way we not only reduce the power consumption to reduce the cost,but also can reduce the Circuit interference to improve the stability of the system.Our MCU has the modules include PWM,UART,ADC and OPO.These modules are designed on the Linux platform,the flow is writing Sepc,drawing state machine,writing Verilog code and other digital front-end process,PR and other back-end design,Tape,test and other steps.The PWM module is to generate 50 Khz AC square wave,the ADC module is used for the conversion of analog signals,and the UART is used for transmitting data.Apart form the MCU,the board-level circuit also need some modules for measuring the body resistance,including low-pass filter module,differential amplifier circuit module,voltage to current conversion circuit module and the peak extraction circuit Module.The modules and MCU can be combined to achieve the goal of measuring physiological parameters.After designing and verifying the MCU,we designs the peripheral modules to measure the body weight and human body impedance accurately as long it is built on platform successfully.Finally,physiological parameters of the human body can be obtained.The final design of the board-level circuit is the simplest and it can reduce the cost to the maximum extent.Hence,the system has the advantages of autonomy,high precision,low cost,high reliability,high practicality and so on.