ABSTRACT
ABSTRACT: This paper describes the design of a reflective pulse oximetry sensing system based on the semi-active RFID tag. It can monitor human physiological signals continuously through the wireless sensor network. The system is composed of four modules: reflective pulse oximetry detection module, data processing module, RFID transceiver module, and PC interface. These modules can achieve the function of monitoring non-invasive, real-time, and long-distance wireless pulse oximetry. The reflectance probe is designed to collaborate with LEDs with wavelengths of 660 nm and 940 nm. The data processing module is designed to manage almost all of the internal processing. The RFID transceiver module is based on the EPC C1 GEN2/ISO 18000-6c protocol for communication. The RFID reader communicates with the RFID tag through the electromagnetic wave. The pulse and blood oxygen information measured by the sensor will be displayed in the upper computer interface. The experimental results show that the system has high accuracy and low power consumption, and will have a good application prospect in the direction of wearable medical wisdom research.
