Abstract

Wireless Human Body Sensor Networks (WHBSNs) are extensively used in vital sign monitoring applications and predicting crop health in in order to identify emergency situations and allow caregivers to respond efficiently. When a sensor is drained of energy, it can no longer achieve its role without a substituted source of energy. However, limited energy in a sensor’s battery prevents the long-term process in such applications. In addition, replacing the sensors’ batteries and redeploying the sensors can be very expensive in terms of time and budget and need the presence of the patient at the hospital. To overcome the energy limitation, researchers have proposed the use of energy harvesting to reload the rechargeable battery by power. Therefore, efficient power management is required to increase the benefits of having additional environmental energy. This paper presents a review of energy efficient harvesting mechanisms to extend the Wireless Human Body Sensors lifetime.

Keywords: Wireless human body sensors; Energy saving mechanisms; Energy efficient harvesting; piezoelectric; Power consumption; Human body