CN103326430B - Standing tree environment energy harvesting method - Google Patents
Standing tree environment energy harvesting method Download PDFInfo
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- CN103326430B CN103326430B CN201310232108.9A CN201310232108A CN103326430B CN 103326430 B CN103326430 B CN 103326430B CN 201310232108 A CN201310232108 A CN 201310232108A CN 103326430 B CN103326430 B CN 103326430B
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Abstract
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
The present invention relates to a kind of live standing tree environmental energy collection method, can solve and can not charge in time at the battery of adverse circumstances or unmanned forest zone wireless sensor network node or change difficult problem.
Background technology
Wireless sensor network is a kind of environment information acquisition and monitoring network that grew up in recent years, utilizes wireless communication technique to realize long-range data acquisition, monitoring and control.Owing to being subject to the restriction of hardware condition, the node of wireless sensor network is usually battery-powered, the energy content of battery is limited, and wireless sensor network node is placed on adverse circumstances or no man's land usually, can not charge the battery in time or change battery in use procedure.The powerup issue solving wireless sensor network node has become the study hotspot of association area.Wireless sensor network is also widely used in field of forestry, as laid wireless sensor network in forest, completes for forest environment (temperature, humidity, wind-force, luminous intensity etc.) monitoring, particularly particularly necessary to the monitoring of forest fire.If can gather materials on the spot, fully existing for the forest energy as: the environmental energy such as solar energy, luminous energy, wind energy, biological power is collected and is stored, as wireless sensor network node power supply, this plays facilitation by wireless sensor network in the generally application of field of forestry.
Find after deliberation between the soil around live standing tree and its because the difference of pH value has ion concentration difference, the voltage that tens arrive hundreds of millivolt can be produced, if change the acid-base value (pH value) between live standing tree and the soil around it, thus the ion concentration changed between live standing tree and the soil around it, the voltage produced also changes thereupon.If can gather materials on the spot in forest, this electricity collection naturally existed is got up to lithium cell charging, for the power supply of the wireless sensor network node of forest environment monitoring, can solve and can not charge in time at the battery of adverse circumstances or unmanned forest zone wireless sensor network node or change difficult problem.
Summary of the invention
The present invention relates to a kind of live standing tree environmental energy collection method, because the difference of pH value has ion concentration difference between the soil of basis around live standing tree and its, tens can be produced invent to this natural phenomena of voltage of hundreds of millivolt, comprise: weak voltage collection and connecting circuit, passive booster circuit, energy accumulation storage circuit.
Described weak voltage collection be to the soil of live standing tree and its growth between weak voltage collection, select pH value difference between live standing tree and the soil around it to be greater than 1 place to gather, (diameter is 3.45mm to use threaded steel nail, length is 9.788cm) as electrode, follow closely the measured point place at live standing tree and soil, more than degree of depth 5cm, determine that on live standing tree, certain is a bit as a reference point, the voltage between surrounding soil to reference point is the weak voltage signals of collection;
Described passive booster circuit comprises the charge pump module of DC-DC boost converter startup and the DC-DC boost converter module of CMOS, boosts to 3v by passive for the weak voltage signals (tens to hundreds of millivolt) gathered;
Described energy accumulation storage circuit comprises ultracapacitor, micro-loss Intelligent Charge-control System, lithium battery, described passive booster circuit is risen to the signal of telecommunication of voltage 3v, to ultracapacitor charging, storage power, under micro-loss Intelligent Charge-control System controls, to lithium cell charging.
Described in live standing tree environmental energy collection method, charge pump module for power supply power supply is provided by voltage between the live standing tree collected and soil, the output voltage of charge pump module as the power supply of DC-DC boost converter module, without the need to any external power supply.
The present invention has following function:
By the weak voltage collection between the soil to live standing tree and its growth, boosting, accumulation of energy, store, to lithium cell charging, this lithium battery can be used as the power supply of wireless sensor network node;
The object of the invention is: gather materials on the spot, by biological power distinctive in live standing tree and soil media electricity collection with store, as wireless sensor network node power supply, solve the powerup issue of wireless sensor network node, in the generally application of field of forestry, facilitation is played to wireless sensor network.
Accompanying drawing explanation
Accompanying drawing 1: a kind of live standing tree environmental energy collection method the general frame
Accompanying drawing 2: voltage acquisition connection layout between live standing tree and soil
Accompanying drawing 3: passive booster circuit block diagram
Accompanying drawing 4: energy savings storage circuit block diagram
Embodiment
Ion concentration difference is had for the difference due to pH value between live standing tree and the soil around it, lasting, stable this natural phenomena of voltage that tens arrive hundreds of millivolt can be produced, as collected, being stored, for the charging of wireless sensor network node battery, to the powerup issue of wireless sensor network node be solved, therefore invented a kind of live standing tree environmental energy collection method.This collection method is made up of three parts, comprising: weak voltage collection and connecting circuit, passive booster circuit, energy accumulation storage circuit, as shown in Figure 1.
Wherein: weak voltage collection and connecting circuit be to complete to the correct collection of the voltage signal between live standing tree and the soil around it be connected.If research finds that between live standing tree and the soil around it, pH value difference is larger, the voltage produced is larger, so when the weak voltage between the soil to live standing tree and its growth gathers, first to measure the pH value of live standing tree and the soil around it, select pH value difference between live standing tree and the soil around it to be greater than 1 place and carry out voltage acquisition; During special circumstances, the method for human intervention can be adopted to increase pH value difference between live standing tree and the soil around it, namely according to collection place live standing tree, the requirement of soil for growth is increased to acidity or the alkalescence of soil.During concrete collection, (diameter is 3.45mm to use threaded steel nail, length is 9.788cm) as electrode, follow closely the measured point place at live standing tree and soil, more than degree of depth 5cm, determine that on live standing tree, certain is a bit as a reference point (as accompanying drawing 2, shown in a point), determine that some points of soil are as collection point again, the voltage between surrounding soil to reference point is the weak voltage signals of collection, as shown in Figure 2 U
1, U
2, U
3, U
4be the voltage signal between collection point and reference point.Because the voltage signal output current that a place gathers is less, general between 10 μ A-20 μ A, the voltage signal that a few place gathers to be connected in parallel, make the electric current after parallel connection reach more than 50 microamperes, time in parallel, polarity of voltage wants consistent, and each voltage signal difference can not more than 40mv, as the input voltage signal of passive booster circuit, get how many soil collecting point, depend on that the electric current being input to the passive booster circuit in back will reach more than 50 microamperes, to drive subsequent conditioning circuit;
Passive booster circuit includes can in the DC-DC boost converter module (this module core chip is S8353A30) of the boost DC-DC converter startup charge pump module (this module core chip is S882Z20) of extra low voltage work and CMOS, whole circuit is powered without the need to any external power supply, as shown in Figure 3.Wherein charge pump module for power supply power supply is provided by voltage between the live standing tree collected and soil, the output voltage of charge pump module is as the power supply of DC-DC boost converter module, passive booster circuit can by tens of collection in worksite to the weak voltage signal of telecommunication (in accompanying drawing 3 Uin signal) of hundreds of millivolt, is passively raised to voltage 3v signal (in accompanying drawing 3 Uout signal);
Energy accumulation storage circuit includes ultracapacitor C
5, micro-loss Intelligent Charge-control System (this module core chip is CBC3112), lithium battery etc., as shown in Figure 4, passive booster circuit is risen to the signal of telecommunication (in accompanying drawing 4 Uout signal) of voltage 3v, to ultracapacitor charging, storage power, under micro-loss Intelligent Charge-control System controls, to lithium cell charging, this lithium battery can be used as the power supply of wireless sensor network node.
Technique effect
Ion concentration difference is had for the difference due to pH value between live standing tree and the soil around it, lasting, stable this natural phenomena of voltage that tens arrive hundreds of millivolt can be produced, as collected, being stored, for the charging of wireless sensor network node battery, by solving the powerup issue of wireless sensor network node, in the generally application of field of forestry, facilitation is played to wireless sensor network.
Claims (2)
1. a live standing tree environmental energy collection method, because the difference of pH value has ion concentration difference between the soil of basis around live standing tree and its, tens can be produced invent to this natural phenomena of voltage of hundreds of millivolt, comprise: weak voltage collection and connecting circuit, passive booster circuit, energy accumulation storage circuit, is characterized in that:
Described weak voltage collection be to the soil of live standing tree and its growth between weak voltage collection, select pH value difference between live standing tree and the soil around it to be greater than 1 place to gather, use diameter 3.45mm, length for the threaded steel nail of 9.788cm is as electrode, follow closely the measured point place at live standing tree and soil, more than degree of depth 5cm, determine that on live standing tree, certain is a bit as a reference point, the voltage between surrounding soil to reference point is the weak voltage signals of collection;
Described passive booster circuit comprises the charge pump module of DC-DC boost converter startup and the DC-DC boost converter module of CMOS, boosts to 3v by tens millivolts that gather to hundreds of millivolt weak voltage signals is passive;
Described energy accumulation storage circuit comprises ultracapacitor, micro-loss Intelligent Charge-control System, lithium battery, described passive booster circuit is risen to the signal of telecommunication of voltage 3v, to ultracapacitor charging, storage power, under micro-loss Intelligent Charge-control System controls, to lithium cell charging.
2. live standing tree environmental energy collection method according to claim 1, wherein said charge pump module for power supply power supply is provided by voltage between the live standing tree collected and soil, the output voltage of described charge pump module as the power supply of described DC-DC boost converter module, without the need to any external power supply.
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| CN201310232108.9A CN103326430B (en) | 2013-06-13 | 2013-06-13 | Standing tree environment energy harvesting method |
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| CN107623903B (en) * | 2017-09-28 | 2021-02-02 | 中国矿业大学 | Environment monitoring wireless sensor network node for capturing microbial energy |
| CN111308320B (en) * | 2020-03-05 | 2022-05-03 | 天津农学院 | Living tree bioelectricity circuit model and determination method of parameters of elements of living tree bioelectricity circuit model |
| CN112649567A (en) * | 2020-12-01 | 2021-04-13 | 西南交通大学 | Air detection device based on tree power generation |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201114136Y (en) * | 2007-09-29 | 2008-09-10 | 上海市计算技术研究所 | Field wireless sensor network integral node |
| CN102255565A (en) * | 2011-05-26 | 2011-11-23 | 重庆大学 | Indoor dim light micro-energy acquisition system and powering method for self-powered wireless sensor |
| CN102938624A (en) * | 2011-08-15 | 2013-02-20 | 朴昌浩 | Heat energy acquisition system |
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| US7692411B2 (en) * | 2006-01-05 | 2010-04-06 | Tpl, Inc. | System for energy harvesting and/or generation, storage, and delivery |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201114136Y (en) * | 2007-09-29 | 2008-09-10 | 上海市计算技术研究所 | Field wireless sensor network integral node |
| CN102255565A (en) * | 2011-05-26 | 2011-11-23 | 重庆大学 | Indoor dim light micro-energy acquisition system and powering method for self-powered wireless sensor |
| CN102938624A (en) * | 2011-08-15 | 2013-02-20 | 朴昌浩 | Heat energy acquisition system |
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