CN103296723B - Forest environment energy collection method - Google Patents
Forest environment energy collection method Download PDFInfo
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- CN103296723B CN103296723B CN201310232122.9A CN201310232122A CN103296723B CN 103296723 B CN103296723 B CN 103296723B CN 201310232122 A CN201310232122 A CN 201310232122A CN 103296723 B CN103296723 B CN 103296723B
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Abstract
A forest environment energy collection method is used for completely utilizing the existing energy of forest environment such as biological electric energy and wind energy and collecting and storing the energy to solve the power supply problem of application of wireless sensor network nodes in the forest. The forest environment energy collection method includes a standing tree soil voltage collection and connection circuit, a power generation small windmill, a wind power collection and voltage doubling rectifying circuit, a standing tree soil electric and wind power automatic switching circuit, a passive boosting circuit and an energy accumulation storage circuit. The collection method is characterized in that voltage signals between stranding trees and the soil where the trees grow and voltage signals generated by the power generation small windmill arranged on the trees under the effect of natural wind in the forest can be collected, the collected voltage signals of the standing trees and the soil where the trees grow and voltage signals generated by the power generation small windmill and passing through the voltage doubling rectifying circuit are compared, the signals with high voltage are automatically connected with the passive boosting circuit, the voltage is boosted to 3v by the passive boosting circuit and collected by a super capacitor, energy is stored, and a lithium battery is charged under the control of a micro loss intelligent charging controller.
Description
Technical field
The present invention relates to a kind of forest environment 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 dark woods, completes for forest environment (temperature, humidity, wind-force, luminous intensity etc.) monitoring, particularly particularly necessary to the monitoring of forest fire.
Wind energy is the inexhaustible energy, and the utilization of wind energy has a long history, but common wind power plant volume is large, it is large to take up an area, and is not suitable for using in forest, and such equipment cost is higher also limit its field of employment.If design the little windmill of generating of ultra-small volume (being only the fist size of people), low price (tens yuans), adopt multiple by difference towards the diverse location being placed in forest-tree, realize storing forest wind collecting, be very suitable for powering to the node of wireless sensor network in forest.
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, these electricity collection naturally existed are got up to lithium cell charging, for the wireless sensor network node of forest environment monitoring is powered, 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, this plays facilitation by wireless sensor network in the generally application of field of forestry.
Summary of the invention
The present invention relates to a kind of forest environment energy collection method, comprising: live standing tree soil voltage acquisition and connecting circuit, the little windmill of generating, wind-powered electricity generation collection and voltage doubling rectifing circuit, live standing tree soil electricity and wind-powered electricity generation automatic switch-over circuit, passive booster circuit, energy accumulation storage circuit;
Voltage acquisition between described live standing tree soil voltage acquisition and connecting circuit complete the soil of live standing tree and its growth, 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 live standing tree soil voltage signal of collection;
Containing permanent magnet, coil in the little windmill of described generating, under forest wind effect, produce alternating voltage signal; Described wind-powered electricity generation collection and voltage doubling rectifing circuit are that the alternating voltage signal sent the little windmill of described generating carries out collection and forms wind voltage signal after voltage multiplying rectifier;
The live standing tree soil voltage signal of described collection and wind voltage signal can compare with wind-powered electricity generation automatic switch-over circuit by described live standing tree soil electricity, are automatically connected with described passive booster circuit by signal large for voltage;
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 direct current 3v by passive for the voltage signal (direct current tens is 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 direct voltage 3v, to ultracapacitor charging, storage power, under micro-loss Intelligent Charge-control System controls, to lithium cell charging.
After described charge pump module for power supply power supply is compared with wind voltage signal by the live standing tree soil voltage signal gathered, larger voltage provides, 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.
The little windmill of described generating has 3 rotary fans, and the most strong point of flabellum is 45mm, and the widest part is 54.72mm, thick 1mm, helical angle 27.95 degree, helicoid helical pitch 45mm, and hard PVC plate is made; The little windmill of described generating can be equipped with multiple, to be installed in forest on one or many trees, and the little windmill that generates electricity is towards can be different.
This invention has following function:
Automatically switched by certain way collection by the voltage signal that sends live standing tree soil voltage signal and forest wind, boost to the signal after switching, accumulation of energy, 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, utilize the existing energy of forest environment, natural wind in forest is acted on the little windmill of installation generating in the tree to produce in electric energy and forest distinctive biological power between live standing tree and the soil around it and collect and 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 forest environment energy collection method the general frame
Accompanying drawing 2: voltage acquisition connection layout between live standing tree and soil
Accompanying drawing 3: generate electricity little fan blade of windmill structure, dimensional drawing
Accompanying drawing 4: live standing tree soil electricity and wind-powered electricity generation automatic switch-over circuit block diagram
Accompanying drawing 5: passive booster circuit block diagram
Accompanying drawing 6: energy accumulation storage circuit block diagram
Embodiment
Have a lot of natural energy source in forest environment, will electric energy be produced as the natural wind in forest acts on the little windmill of installation generating in the tree; Difference and for example due to pH value between live standing tree and the soil around it in forest has ion concentration difference, lasting, the stable voltage that tens arrive hundreds of millivolt can be produced, as by these electricity collection, storage, be wireless sensor network node battery charging, to the powerup issue of wireless sensor network node be solved, therefore invented a kind of forest environment energy collection method.A kind of forest environment energy collection method comprises: live standing tree soil voltage acquisition and connecting circuit, the little windmill of generating, wind-powered electricity generation collection and voltage doubling rectifing circuit, live standing tree soil electricity and wind-powered electricity generation automatic switch-over circuit, passive booster circuit, energy accumulation storage circuit, as shown in Figure 1.
Wherein: live standing tree soil voltage acquisition 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 live standing tree soil voltage signal 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;
The little windmill that generates electricity has 3 rotary fans, and the most strong point of flabellum is 45mm, and the widest part is 54.72mm, thick 1mm, helical angle 27.95 degree, helicoid helical pitch 45mm, and hard PVC plate is made, and concrete size as shown in Figure 3.The feature of the little windmill of this generating is: volume is little, lightweight, low price, and extra small volume is only the fist size of people, and cheap price only needs tens yuans.The little windmill that generates electricity can be equipped with multiple, to be installed in forest on one or many trees, and the little windmill that generates electricity is towards can be different; The electricity that the little windmill that generates electricity sends is alternating voltage signal, after voltage acquisition and voltage doubling rectifing circuit boosting, be transformed into the d. c. voltage signal that tens arrive hundreds of millivolt, the wind voltage signal namely gathered;
The live standing tree soil voltage signal of described collection and wind voltage signal are compared, automatically signal large for voltage is connected with described passive booster circuit, as shown in Figure 4;
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, as shown in Figure 5.Whole circuit is powered without the need to any external power supply, wherein charge pump module for power supply power supply compared with wind voltage signal by the live standing tree soil voltage signal gathered after larger voltage provide, 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 signals (in accompanying drawing 5 Uin signal) of hundreds of millivolt, is passively raised to voltage 3v signal (in accompanying drawing 5 Uout signal);
Energy accumulation storage circuit includes ultracapacitor C
9, micro-loss Intelligent Charge-control System (this module core chip is CBC3112), lithium battery etc., as shown in Figure 6, described passive booster circuit is risen to the signal of telecommunication (in accompanying drawing 6 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
The present invention is directed to the natural energy source had in forest environment, electric energy will be produced and the difference due to pH value between live standing tree and the soil around it in forest has ion concentration difference as the natural wind in forest acts on the little windmill of installation generating in the tree, tens continuing to hundreds of millivolt can be produced, this natural phenomena of stable voltage, devise a kind of forest environment energy collection method, the electric energy collected can be wireless sensor network node and powers, solve wireless sensor network node and can not charge or change the difficult problem of battery in time, in the generally application of field of forestry, facilitation is played to wireless sensor network.
Claims (4)
1. a forest environment energy collection method, comprise: live standing tree soil voltage acquisition and connecting circuit, generate electricity little windmill, wind-powered electricity generation gathers and voltage doubling rectifing circuit, live standing tree soil electricity and wind-powered electricity generation automatic switch-over circuit, passive booster circuit, energy accumulation storage circuit, it is characterized in that: the voltage acquisition between described live standing tree soil voltage acquisition and connecting circuit complete the soil of live standing tree and its growth, 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 is that 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, voltage between surrounding soil to reference point is the live standing tree soil voltage signal of collection, containing permanent magnet, coil in the little windmill of described generating, under forest wind effect, produce alternating voltage signal,
Described wind-powered electricity generation collection and voltage doubling rectifing circuit are that the alternating voltage signal sent the little windmill of described generating carries out collection and forms wind voltage signal after voltage multiplying rectifier;
The live standing tree soil voltage signal of described collection and wind voltage signal can compare with wind-powered electricity generation automatic switch-over circuit by described live standing tree soil electricity, are automatically connected with described passive booster circuit by signal large for voltage;
Described passive booster circuit comprises the charge pump module of DC-DC boost converter startup and the DC-DC boost converter module of CMOS, and the direct current tens millivolts of collection is boosted to direct current 3v to hundreds of millivolt voltage signal is passive;
Described energy accumulation storage circuit comprises ultracapacitor, charge controller, lithium battery, uses the described passive direct voltage boosting to 3v to ultracapacitor charging, storage power, under charge controller controls, to lithium cell charging.
2. a kind of forest environment energy collection method according to claim 1, after wherein said charge pump module for power supply power supply is compared with wind voltage signal by the live standing tree soil voltage signal gathered, larger voltage provides, 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.
3. a kind of forest environment energy collection method according to claim 1, the little windmill of wherein said generating has 3 rotary fans, and the most strong point of flabellum is 45mm, the widest part is 54.72mm, thick 1mm, helical angle 27.95 degree, helicoid helical pitch 45mm, described flabellum is made up of hard PVC plate.
4. a kind of forest environment energy collection method according to claim 1, is wherein equipped with the little windmill of multiple described generatings, and to be installed in forest on one or many trees, the little windmill of described generating is towards different.
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| CN201310232122.9A CN103296723B (en) | 2013-06-13 | 2013-06-13 | Forest environment energy collection method |
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| CN103697938A (en) * | 2013-12-04 | 2014-04-02 | 哈尔滨工业大学 | Wireless sensor node capable of collecting reinforcement corrosion energy |
| CN104155892B (en) * | 2014-07-11 | 2017-03-01 | 深圳市浩博高科技有限公司 | Circuit and method using the faint energy collection technology of single-chip I/O mouth |
| CN107078539A (en) * | 2016-12-20 | 2017-08-18 | 深圳市浩博高科技有限公司 | A kind of micro-energy acquisition method, device and micro-energy charger |
| CN110365252A (en) * | 2019-05-27 | 2019-10-22 | 南京林业大学 | A kind of tree energy power generator |
| CN112649567A (en) * | 2020-12-01 | 2021-04-13 | 西南交通大学 | Air detection device based on tree power generation |
| CN112598867A (en) * | 2020-12-03 | 2021-04-02 | 西南交通大学 | Forest temperature detection system and method based on plant power generation |
| CN112652139A (en) * | 2020-12-31 | 2021-04-13 | 西南交通大学 | Forest fire prevention alarm system based on tree power supply |
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| US7692411B2 (en) * | 2006-01-05 | 2010-04-06 | Tpl, Inc. | System for energy harvesting and/or generation, storage, and delivery |
| CN201188547Y (en) * | 2008-04-25 | 2009-01-28 | 中山大学 | System for automatically acquiring and supplying energy |
| EP2312639A1 (en) * | 2009-10-15 | 2011-04-20 | Nxp B.V. | A photovoltaic assembly and method of operating a photovoltaic assembly |
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