Passive target tracking system and method based on wireless energy transmission driving

Abstract

The invention provides a passive target tracking system and method based on wireless energy transmission driving. The system comprises an energy transmitting device, a plurality of passive anchor nodes and a target node. The energy transmitting device comprises a plurality of antennas and has wireless energy transmitting and feedback data receiving functions. The target node periodically broadcasts a ranging signal. Each passive anchor node is used as a power supply by receiving wireless energy transmitted by the energy transmitting device, and captures the distance measurement signal sent bythe target node to be tracked . The distance measurement signal sent by the target node is converted into distance measurement information, and the distance measurement information is sent back to theenergy transmitting device. The energy transmitting device positions the position of the target node based on the distance measurement information. According to the system and the method, the positioning precision and the total power consumption can be controlled, and power distribution according to needs is realized.

Description

technical field [0001] The present invention relates to the field of communication technology, in particular to a passive target tracking system and method driven by wireless energy transmission. Background technique [0002] Extending the life cycle of an Internet of Things (IoT) based positioning system is a key issue. Especially in environments that cannot be reached by GPS, such as buildings, urban canyons, under tree canopies, or caves, IoT devices can be deployed on a large scale in such vast areas and require sufficient energy to maintain a long service life. In order to keep the Wireless Location System in a low-power consumption mode, researchers have proposed many energy-saving schemes. However, no matter how energy-saving schemes are designed for IoT systems, it is inevitable that the battery will eventually be drained. While batteries can be replaced or recharged, they are inconvenient, expensive, and even dangerous for large-scale deployments in harsh environm...

AI Technical Summary

Problems solved by technology

However, the inherent disadvantage of this method is that the capacity of the battery is always a declining process. No matter what energy-saving technology is adopted, the battery will still be exhausted eventually, and it still needs to be recharged or replaced.

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