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This paper presents a hybrid-powered wireless sensor node using enhanced triboelectric nanogenerator (TENG) as both energy harvester and air-flow sensor and two 11 cm2 solar panels as extra power supply. A low budget commercial RF microcontroller is included for data conversion, signal processing and wireless transmission. The method of flow-rate detection depends on the vibration frequency of the...
We have reported a prototype of wireless sensor node with ultra-low power consumption which has promising application on the temperature monitoring in central air conditioning system. Air-flow driven nanogenerators are utilized to harvest electric energy directly from the wind tunnel in a building. Using a microcontroller unit with event-driven strategy, the wireless sensor nodes can send out a temperature...
This paper considers applying simultaneous wireless information and power transfer (SWIPT) technique to cooperative clustered wireless sensor networks, where energy-constrained relay nodes harvest the ambient radio-frequency (RF) signal and use the harvested energy to forward the packets from sources to destinations. To this end, we first formulate the energy-efficient cooperative transmission (eCotrans)...
In this paper, we put forward a coupled electromechanical model with differential equation arrays for an electret-based energy harvester with out-of-the plane gap closing scheme. The model is numerically solved for output voltage and displacement of the moveable electrode with given parameters by Matlab/Simulink software. Furthermore, system optimization is carried out using the coupled model to find...
Localization is always a critical technology of wireless network. This paper introduces the theory of RSS-base localization, sets up a new localization algorithm and analyzes excellence of this algorithm. This paper compares it with other algorithms and compares their localization accuracy and directional judgement accuracy by indoor experiments. The result indicates that analysis of the noises and...
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