Abstract
<abstract> <bold><sc>Abstract.</sc></bold> In order to solve the difficult problem of replacing batteries in wireless sensor network nodes in a forest, a method for collecting the weak electricity from a living tree and the surrounding soil is explored in this research brief. The weak electricity is one type of plant electricity. The method for collecting the plant electricity was tested on different kinds of trees. According to the experiments, the plant electricity was in the range of 300 to 900 mV, and there was no direct relationship between the magnitude of the plant electricity and the distribution of the electrodes used for collecting electricity from the tree trunk and the soil. Based on the above findings, a device for collecting plant electricity and a passive DC-DC boost circuit were designed and fabricated. A large number of tests indicated that the weak voltage of the collected plant electricity could be boosted to approximately 3 V without other additional power sources. Two parallel inputs of plant electricity were able to generate an output energy of 0.96 J, allowing a low power consumption wireless sensor node to collect and transmit data for one day. Furthermore, four parallel inputs of plant electricity were able to generate twice the energy of two inputs, which indicated a linear relationship between the number of inputs and the output energy. Therefore, collection and storage of plant electricity has practical value in solving the problem of powering wireless sensor network nodes in a forest.
Published Version
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