In order for a wireless sensor network http://www.selleckchem.com/products/Imatinib(STI571).html to work independently for an infinite time, devices or systems have been developed that allow you to collect solar energy and convert it into a variable voltage output to driving multiple loads. In [11] an energy harvesting chip to scavenge energy from artificial light to charge a wireless sensor node was developed. This chip core uses a miniature transformer with a nano-ferrofluid magnetic to convert the harvested energy loaded. The authors mentioned that in their measurements that proposed system achieved good results, even when one has a low luminosity of 240 LUX, and 54% of the energy collected can be saved by the feedback control of the sensor network described.
The amount of power harvesting in the experimental setup is 15 mA and only 5 mA is consumed in state on, but the reference does not mention exactly how much energy is consumed in the off state.In Inhibitors,Modulators,Libraries other work similar to the last design, a scheme that collects energy using solar panels but employing 34 W fluorescent lamps as an energy source, which are commonly found in the halls or rooms of hospitals was developed [12]. The energy harvesting module consists of a power management circuit that is connected to a group of ultracapacitors that store energy and manage the power supply to the nodes. After analyzing this work, we see that the total amount of energy used in the off and on states is 21 mA and the off state consumes only 9 mA, which is similar to the power in the on state of 12 mA. From these data can be summarized that energy employed in off state is Inhibitors,Modulators,Libraries wasted.
A solar cell-based power supply for an agricultural environment Inhibitors,Modulators,Libraries monitoring server system for monitoring information concerning an outdoors agricultural production environment utilizing Wireless Sensor Network (WSN) technology is implemented in [13]. This technology could contribute to increasing crop yields and improving quality in the agricultural field by supporting the decision making of crop producers through analysis of the collected information.3.?System ArchitectureFigure 1 shows our solar powered system which is divided into three sections: (1) the solar collector, (2) the energy storage, and (3) the load. The operation of each component is described separately below.Figure 1.Model for a solar powered system.3.1. Solar CollectorSolar energy is collected by the solar collector module.
During darkness, the solar cell is not an active device; instead, it works as a diode and produces neither Inhibitors,Modulators,Libraries a current nor a voltage. For our work, we consider a model of moderate complexity with regards to the photovoltaic solar cell [14]. The amount AV-951 of current generated (Ic) depends on the intensity of solar radiation (Gr, in watt/m2) and is expressed in Equation (1):Ic(Gr)=IL(Gr)?I0(.)?(Vc?IcRs)Rsh(1)where Istodax I0(.