One goal of our research is to make wireless distributed pyroelectric sensor nodes an alternative to the centralized infrared video sensors, with lower cost, lower detectability, lower power consumption and computation workload, and less privacy infringement. To improve the identification rate and the number of people that can be recognized, one-by-one or simultaneously, we employ multiple sensor nodes to leverage the performance of the distributed sensor system. By using multiple sensor nodes the proposed biometric modality can be extended to the higher-security applications of walker recognition, and facilitate multiple human tracking.
The aim of this study is to design and develop a wireless distributed pyroelectric infrared sensor system which can track multiple humans. By using TI’s micro-controller MSP430149 and RF transceiver TRF6901, we have implemented a prototype multiple human tracking system, which can track two people in both follow-up and crossover scenarios with average tracking errors less than 0.5 m. The proposed wireless distributed infrared sensor system can not only run as a stand alone inmate/patient monitoring system under all illumination conditions, but also serve as a complement for conventional video and audio human tracking systems.