Abstract
In many logistics applications, densely placed objects on high-speed conveyor belts are attached with passive tags for automatic identification and sorting to work more efficiently. Traditional localization or sorting methods cannot effectively work in such scenarios due to complex environments. In this article, we propose a new passive radio frequency identification sorting system for dense mobile tags on high-speed conveyor belts by utilizing the output phase. At first, a relative motion model is utilized to get the zero point time when the object passes the radio frequency identification portal. Then, the coarse-grained time and the corresponding speed of the conveyor belt are obtained by the phase curve fitting. Finally, the inverse synthetic aperture radio frequency identification is used to get the fine-grained zero point time, which is realized based on the holographic image reconstruction. And the particle filter is utilized to get a significant reduction of computational burden. The proposed method is implemented with commercial-off-the-shelf devices, and the evaluation results in various scenarios show our system can achieve an average accuracy of 97% with the tag density of 10/m and at a speed of 4 m/s.
Highlights
The Internet of Things (IoT) is the key to industrial upgrading, which has been attracting increasing attention in both academia and industry recently
As an important component of industrial automation, radio frequency identification (RFID)based conveyor belts are widely deployed in many applications to identify objects quickly and improve work efficiency, such as postal sorting offices and airport baggage handling systems
We present a lightweight passive RFID sorting system (PRSS) for dense objects on high-speed conveyor belts based on COTS RFID devices
Summary
The Internet of Things (IoT) is the key to industrial upgrading, which has been attracting increasing attention in both academia and industry recently. The operation that the RFID-based conveyor belt systems distinguish objects and deliver them to the proper destinations is usually called sorting. In these systems, the RFID reader antennas are fixed on a gate above the conveyor belt, which is called the RFID portal. In order to work more efficiently, objects are usually densely placed on high-speed conveyor belts which makes sorting more difficult. Both the increasing number of tags in the RFID interrogation zone and the reduction. When the tags move along the conveyor belt, they will be interrogated a few times with RSSI and output phase
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
