Standing tree environment energy harvesting method
A technology of energy harvesting and living trees, which can be applied to current collectors, electric vehicles, electrical components, etc., and can solve problems such as limited battery energy
Inactive Publication Date: 2015-04-15
BEIJING FORESTRY UNIVERSITY
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Problems solved by technology
Due to the limitation of hardware conditions, the nodes of wireless sensor networks are usually powered by batteries, the battery energy is limited, and the nodes of wireless sensor networks are usually placed in harsh environments or unmanned areas, and the batteries cannot be charged or replaced in time during use.
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[0016] Aiming at the natural phenomenon that there is a difference in ion concentration between the living tree and the surrounding soil due to the difference in pH value, it can generate a continuous and stable voltage of tens to hundreds of millivolts, such as collecting and storing it, as a wireless sensor The battery charging of network nodes will solve the power supply problem of wireless sensor network nodes, so a method for collecting environmental energy of living trees is invented. The collection method consists of three parts, including: weak voltage collection and connection circuit, passive boost circuit, energy accumulation storage circuit, as attached figure 1 shown.
[0017] Among them: the weak voltage collection and connection circuit is to complete the correct collection and connection of the voltage signal between the living tree and the surrounding soil. The study found that if the PH value difference between the living tree and the surrounding soil is gre...
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The invention relates to a standing tree environment energy harvesting method. An ionic concentration difference exists between a standing tree and soil around the standing tree due to the difference of the PH value, therefore, the natural phenomenon of dozens of millivolts of voltage to hundreds of millivolts of voltage can be generated, and the voltage can be collected and stored to solve the power supply problem when wireless sensor network nodes are applied in a forest. Devices for achieving the standing tree environment energy harvesting method comprise a weak voltage collecting and connecting circuit, a passive boosted circuit and an energy accumulating and storage circuit, wherein the weak voltage collecting and connecting circuit completes correct collection and correct connection on the voltage between the standing tree and the soil so as to drive follow-up circuits according to the situation of the difference of the PH value between the standing tree and the soil around the standing tree, the passive boosted circuit is used for promoting voltage signals collected in the site to the voltage of 3v without any external power source, the energy accumulating and storage circuit is used for conducting energy collecting and energy storage on signals generated when the passive boosted circuit is promoted to the voltage of 3v through a supercapacitor, and a lithium battery is charged under the control of a small-loss intelligent charging controller.
Description
technical field [0001] The invention relates to a method for collecting environmental energy of standing trees, which can solve the problem that batteries of wireless sensor network nodes cannot be charged in time or are difficult to replace in harsh environments or unmanned forest areas. Background technique [0002] Wireless sensor network is a kind of environmental information collection and monitoring network developed in recent years, which uses wireless communication technology to realize remote data collection, monitoring and control. Due to the limitation of hardware conditions, the nodes of wireless sensor networks are usually powered by batteries, and the battery energy is limited, and the nodes of wireless sensor networks are usually placed in harsh environments or unmanned areas, and the batteries cannot be charged or replaced in time during use. Solving the power supply problem of wireless sensor network nodes has become a research hotspot in related fields. Wi...
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IPC IPC(8): H02J7/00
Inventor 李文彬高林阚江明李小婉俞文洋
Owner BEIJING FORESTRY UNIVERSITY