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Indicating the imminent battery depletion of wireless sensor nodes is beneficial for many applications. But corresponding depth of discharge estimation approaches are either complex, constraint or rather imprecise. We present, implement and evaluate a novel approach which is to observe the battery’s overpotential - the change of the voltage under a...
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Citations
... The limited energy of the battery is an important factor in determining the lifespan of a sensor network. A number of papers [1][2][3][4][5] in the area of WSNs have proposed a system configuration and routing scheme in consideration of the residual energy in a sensor system. For example, information about residual energy can be employed in system-level maximization, such as the duty cycle control or transmission-range control, as well as in network-level maximization, such as energy-aware routing schemes. ...
A number of studies have been actively conducted to address limited energy resources in sensor
systems over wireless sensor networks. Most of these studies are based on energy-aware
schemes, which take advantage of the residual energy from the sensor system’s own or neighboring
nodes. However, existing sensor systems estimate residual energy based solely on voltage
and current consumption, leading to inaccurate estimations because the residual energy in real
batteries is affected by temperature and load. This misinformation makes a complete nonsense of
existing energy-aware research, which is not allowed in reliable WSN applications. In this study,
therefore, an efficient residual-energy estimation scheme is proposed in consideration of not only
the voltage but also the temperature and load characteristics of batteries. The performance of the
proposed scheme was verified through an experiment and simulations in the actual environment,
and its effect gets more notable when the scale of the WSN goes larger.
Up to date, numerous studies on wireless sensor networks have been performed to overcome the Energy-Constraint of the sensor system. Existing schemes for estimating the residual energy have considered only voltage of sensor system. However battery performance in the real is affected by temperature and load. In this paper we introduce more accurate scheme, for the use in wireless sensor node, based on the interpolation of lookup tables which allow for temperature and load characteristics, as well as battery voltage.
