Study On Key Technologies Of Locatable-body Vital Signs Monitoring Based On RFID

With the increasing development of economy of our country, the national healthawareness and China has gradually entered the aging society needs, people hope anddetermine its position through the remote health monitoring system for real-timemonitoring of human physiological signs, timely treatment and pre so as to realize thedisease first intervention, to significantly reduce the medical cost and improve healthquality significance the national major. In addition, in the major natural disaster (suchas earthquake, volcano eruption) and production (such as mine accident, explosionaccident) life rescue, if can know human vital signs and location information, thetimely rescue, has the extremely vital significance to reduce the chance of survivalwhen disaster happens and the disability rate and mortality to improve disaster duringdisasters.This paper presents a use of RFID technology transfer of body temperature, pulse,blood oxygen saturation and other vital signs parameters, and can determine theposition of the monitoring personnel. Belongs to non-invasive monitoring equipment,short distance to achieve real-time monitoring of human orientation and human vitalsigns monitored. Can be a powerful tool for signs of human body health monitoringand diagnosis of diseases, has the vital significance to the implementation ofpersonalized treatment and disease monitoring, life rescue. In this paper, someimprovements on the nearest location algorithm based on reference tags, proposed adynamic K value setting method, the concept of reference tags credibility and nearestneighbor label bias correction algorithm, and the target label history track algorithm,the positioning accuracy in the harsh environment of improved algorithm is betterthan the original algorithm has been improved obviously. In view of the practicalapplication of difficult to pre arranged a large number of reference tags, this paperproposes a new positioning method of rotating antenna with double RSSI, andanalyzed in theory. The EPC C1G2standards are analyzed, detailed related commandsand anti-collision algorithm. Low power consumption design scheme proposed vitalsigns monitoring terminal, choose EPC C1G2standard radio frequency temperaturesensor tag chip SL900A as the core components. In order to realize RF sensor tagfunction configuration, extended reader developed to meet EPC C1G2standards, thedevelopment and testing of the relevant orders. Debugging assistant and extended reader communication through the PC serial port, monitor terminal function to the RFmode configuration. Analysis of the measuring methods of pulse oximetry,mathematical model of transmission type and reflection type pulse oximetry isdeduced.The portable pulse oximeter equipment design and selection of South Korea,a photoelectric reflection type pulse oximetry sensor, pulse oxygen saturationmeasurement is developed, and the display interface, pulse, oxygen saturationmeasuring equipment for experimental and clinical, results show that the two havebetter consistency.Finally, build a vital signs monitoring system experimental platform, with the dogas monitoring objects, monitoring of vital signs were positioning experiment. Afteranalysis, system can real-time monitoring the changes of body temperature frompuppy; effect of positioning, positioning error is less than0.35meters55%,72%localization error is less than0.4meters, the positioning error is within0.5metersaccounted for83%, the average localization error is0.461meters, the maximum erroris0.65meters.