by Mat Dirjish
In a recent study, researchers from Chung-Ang University unveiled a unique, energy-efficient adaptive directional charging (EEADC) algorithm that takes into account the density of sensor nodes to adaptively choose single charging or multi-charging sensor modules in wireless rechargeable sensor networks (WRSNs). The main challenge of WRSNs is to effectively charge and maintain the network sensors’ batteries.
Charging efficiency decreases as the charging distance increases. As a result, single charging is more energy-efficient than multi-charging as it can charge a sensor node at a closer range. But when multiple nodes are present, multi-charging may achieve higher efficiency.
The researchers, led by Professor Sungrae Cho at the School of Computer Science and Engineering, Chung-Ang University, want to optimize the mobile charging of sensors efficiently through wireless power transmission technology. Professor Cho said, “Wireless power transmission using a mobile charger is designed to be an efficient method, but if a directional antenna is not used, this method is power inefficient.”
Chung-Ang University researchers, in an article published in IEEE Internet of Things Journal, say they’ve developed an energy-efficient adaptive directional charging (EEADC) algorithm that considers the density of sensor nodes to adaptively choose single charging or multi-charging. As EEADC dynamically determines the charging strategy, based on the charging efficiency, the researchers reportedly achieved equal or better charging efficiency than single charging and simultaneously reduced energy waste due to overuse of multi-charging.
Summarily, the researchers say the adaptive and directional features of EEADC significantly enhance the energy efficiency of charging sensors in WRSNs. Professor Cho explains, “Using this algorithm, we can increase charging efficiency significantly by using a directional antenna and a directional beam for charging the sensor node. As a result, sensors that are close to each other can efficiently charge at the same time.”
If this piques your interest, feel free to procure and peruse the IEEE Internet of Things paper titled, Energy-Efficient Directional Charging Strategy for Wireless Rechargeable Sensor Networks. For even more details, take a gander at the Chung-Ang University website.
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