Treasures status monitoring based on dynamic link-sensing

Locating problem has attracted more and more attention in mobile computing and crowd sensing research. Different from other applications, the fundamental task of intelligent protection of historic relic is to determine the position and posture of the treasure at the same time, as well as identifying the stock and monitoring the tourists. Some existing works usually focus on identity recognition and tourist action, however, they can’t monitor the treasure’s information including its position and posture which could be changed due to the slight shock. In this paper, we present the design and implementation of a historical relic position monitoring system (HPMs) based on passive RFID tags which is not only a simple device for identification but becomes a crucial approach of crowd sensing. By observing and analyzing the character of wireless signal, HPMs can estimate the treasure position and further judge its posture. In position estimation phase, we design a dynamic threshold to improve the accuracy of location. In posture judging phase, we propose the multi-link protocol to detect the posture change. Extensive simulations and real environment experiments illustrate the accuracy and efficiency of HPMs in historical relic protection.