Research on wireless transmission system of multi-parameter signs / 国际生物医学工程杂志

ABSTRACT

Objective To design a wireless transmission solution of multi-parameter vital signs signal which can be applied in psychological status assessment.Methods C8051F350 SOC was used to define data frame structure,on application level,including channel number,control words,data and so on,which put all nodes data into the upper computer cache area by channel in an orderly way.A transfer rate of five seconds on a grid,each grid at least 48 groups of data was chosen in buffer,which could not only match the dynamic PC image display,but also to achieve the stability of the channel signal acquisition and orderly transfer.Results After operating test,with the communication distance within 10～15 m,the dynamical display of the upper computer showed a smooth curve data,which met the system design requirement.After optimization of the data frame,the transmission power could be reduced to 1/12 of that of normal mode.The whole system with three advantages of small size,low power and easy to carry.Conclusion Multi-parameter wireless acquisition system described in this paper eliminates the data line connected to the subjects,which does not affect their normal activities and is conducive to the real response of subjects' mental state,and provides a reliable means of detection for psychological assessment.