CN101951033A - Device and method for intelligently supplying power to node based on wireless sensor network - Google Patents

Device and method for intelligently supplying power to node based on wireless sensor network Download PDF

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Publication number
CN101951033A
CN101951033A CN2010102613327A CN201010261332A CN101951033A CN 101951033 A CN101951033 A CN 101951033A CN 2010102613327 A CN2010102613327 A CN 2010102613327A CN 201010261332 A CN201010261332 A CN 201010261332A CN 101951033 A CN101951033 A CN 101951033A
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power supply
super capacitor
energy
storage circuit
voltage
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李道亮
马道坤
傅泽田
温南楠
位耀光
丁启胜
台海江
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China Agricultural University
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China Agricultural University
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    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E70/00Other energy conversion or management systems reducing GHG emissions
    • Y02E70/30Systems combining energy storage with energy generation of non-fossil origin

Abstract

The invention relates to a device and a method for intelligently supplying power to a node based on a wireless sensor network, which belongs to the technical field of low-energy consumption power supply of the node of the wireless sensor network, and aims to solve the problem that the energy supplies and management of the node are inconvenient because the distribution of the node in the field wireless sensor network is wide and the layout environment thereof is complicated. In the technical scheme of the invention, a MCU microprocessor selects the power supply mode of supplying power directly by a solar battery or releasing energy by a super capacitor by collecting external voltages and through internal comparison and judgment so as to intelligently control charging and power supply circuits, and control the node to enter different working modes according to the energy state so as to improve the efficiency of energy utilization. The device and the method of the invention can solve the intrinsic power supply problem of the nodes of the wireless sensor network, and extend the lifecycle of the whole wireless sensor network.

Description

Node intelligent power supply and method based on wireless sensor network
Technical field
The node low energy consumption power supply technique field of wireless sensor network of the present invention is specifically related to a kind of node intelligent power supply and method that adopts microprocessor control, utilizes regenerative resource direct power supply technology and super capacitor energy-storage element.
Background technology
Because wireless sensor network node quantity is many, distributed areas extensively and for a long time are laid in unattended environmental area, its circumstance complication of living in, it is unpractiaca replenishing the energy by the mode of changing battery, thus must adopt effective Energy Saving Strategy, to prolong the life cycle of network.Want to make the sensor node can long-life work, catching energy from environment be a kind of valid approach.Adopt energy storage device from environment, to obtain solar energy, vibrational energy, wind energy or thermal gradient energy equal energy source at present mostly, be the wireless sensor network node energy supply.
It only is the example explanation with solar energy, solar energy is the most common at present and uses a most ripe regenerative resource, and the energy abundance of its generation, be applicable to the wireless sensor network node that is laid in the environment, and the environment for use energy provides a practicable method to the growing green energy resource consciousness of people.Because it is the wireless sensor network node of low-power consumption mostly that present power supply is supplied with object, therefore adopt a kind of in numerous environmental energy just to be enough to supply with sensor node.
The solar power supply apparatus that uses adopts storage battery as rechargeable battery more at present, but storage battery is subjected to the restriction of its genetic prerequisite, exist that cycle life is poor, high temperature performance is poor, charge and discharge process sensitivity, deep discharge performance capability recover problems such as difficulty and environmental pollution, traditional storage battery more and more can't satisfy the requirement of people to energy-storage system.Super capacitor is a kind of novel electric power energy storage device of just producing in batches in recent years, is also referred to as electrochemical capacitor.Super capacitor also has advantage such as have extended cycle life, power density is big, the speed that discharges and recharges is fast, high-temperature behavior good, capacity configuration is flexible, environmental friendliness is non-maintaining, so range of application is more and more wider.
In addition, the ripe solar power supply apparatus of present many moulding is not directed to the design of wireless sensor network node specially.And, there are following three shortcomings in traditional solar power supply apparatus for the application of the wireless sensor network node of low-power consumption: (1) adopts analog signal components and parts such as many electric capacity, amplifier and resistance, has increased the energy consumption and the operating cost of circuit itself; (2) adopt storage battery to charge, have defectives such as limited, high temperature performance difference of charging life-span and environmental pollution be serious; (3) solar cell links to each other with charging control circuit, and decommissions after charge in batteries holds completely, then by storage battery power supply, because this moment, solar cell was in the state of decommissioning, therefore do not utilize solar energy efficiently, lack energy management and controlled step, make power supplying efficiency low.
Summary of the invention
(1) technical problem that will solve
The technical problem to be solved in the present invention is: the energy consumption and the operating cost that how to reduce power supply unit in the wireless sensor network, simplify the circuit scale of electric supply installation, improve efficiency of energy utilization, reduce the maintenance probability, improve security performance, the life cycle that prolongs whole wireless sensor network.
(2) technical scheme
For solving the problems of the technologies described above, the invention provides a kind of node intelligent power supply based on wireless sensor network, charging control circuit that comprises renewable energy source battery, super capacitor energy-storage circuit, links to each other with described super capacitor energy-storage circuit with described renewable energy source battery and microprocessor and the power supply circuits that link to each other with described charging control circuit, described power supply circuits link to each other with described renewable energy source battery, described super capacitor energy-storage circuit and described microprocessor; Wherein,
Described renewable energy source battery is used under the control of described charging control circuit described power supply circuits directly being powered and described super capacitor energy-storage circuit being charged;
Described charging control circuit, be used for the instruction acquisition of transmitting according to described microprocessor and feed back to the magnitude of voltage of the described renewable energy source battery of microprocessor and the magnitude of voltage of described super capacitor energy-storage circuit, simultaneously the described renewable energy source battery of power supply commands for controlling that transmits according to described microprocessor is powered to described super capacitor energy-storage circuit and power supply circuits, and instructs according to the power supply that described microprocessor transmits and to control described super capacitor energy-storage circuit described power supply circuits are powered;
Described microprocessor, be used for the regenerative resource battery voltage value and the super capacitor energy-storage circuit voltage value of being come by described charging control circuit feedback are handled, generate the power supply instruction and be delivered to described charging control circuit and described power supply circuits according to result;
Described super capacitor energy-storage circuit is used for charging under the control of described charging control circuit or described power supply circuits being powered;
Described power supply circuits are used for coming node load is carried out energy support according to the power supply of described renewable energy source battery of described power supply command reception or described super capacitor energy-storage circuit.
Preferably, described renewable energy source battery is solar cell, vibrational energy battery, wind energy battery, thermal gradient energy battery or renewable resource that all the other obtain from natural environment.
Preferably, described super capacitor energy-storage circuit comprises accumulator and voltage boosting and stabilizing circuit;
Described accumulator is connected/is composed in parallel by one or several super capacitor monomers.
In addition, the present invention also provides a kind of node intelligent power supply method based on wireless sensor network, comprises the steps:
Step 1: gather the magnitude of voltage of renewable energy source battery and the magnitude of voltage of super capacitor energy-storage circuit;
Step 2: the magnitude of voltage of described renewable energy source battery and the magnitude of voltage of super capacitor energy-storage circuit are handled, controlled the renewable energy source battery according to result generation power supply instruction super capacitor energy-storage circuit and power supply circuits are powered simultaneously; Perhaps,
According to described power supply commands for controlling super capacitor energy-storage circuit power supply circuits are powered;
Step 3: the power supply of accepting renewable energy source battery or super capacitor energy-storage circuit according to described power supply commands for controlling power supply circuits comes energy support is carried out in load.
Preferably, described regenerative resource battery voltage value and super capacitor energy-storage circuit voltage value are by the charging control circuit collection and feed back to microprocessor;
Described power supply instruction is carried out analog-to-digital conversion and voltage ratio according to described microprocessor to described regenerative resource battery voltage value and super capacitor energy-storage circuit voltage value and is generated than the result of judgment processing.
Preferably, in the described step 2,
When regenerative resource battery voltage value during greater than the supply power voltage threshold value that sets in advance, microprocessor sends power supply instruction indication renewable energy source battery power supply circuits is directly powered, and simultaneously the super capacitor energy-storage circuit is charged.
When regenerative resource battery voltage value during greater than the supply power voltage threshold value that sets in advance, and when super capacitor energy-storage circuit voltage value reaches the charging voltage threshold value that sets in advance, microprocessor transmission power supply instruction indication charging control circuit is closed the charging operations to the super capacitor energy-storage circuit, and the renewable energy source battery only carries out the operation to the direct power supply of power supply circuits simultaneously.
Be lower than the supply power voltage threshold value that sets in advance when the regenerative resource battery voltage value, and super capacitor energy-storage circuit voltage value is when being higher than the first or second discharge voltage threshold value that sets in advance, and microprocessor sends power supply instruction indication super capacitor energy-storage circuit power supply circuits are powered.
Be lower than the supply power voltage threshold value that sets in advance when the regenerative resource battery voltage value, and when super capacitor energy-storage circuit voltage value was lower than the minimum discharge voltage threshold value that sets in advance, microprocessor sent power supply instruction indication charging control circuit and stops the powered operation of super capacitor energy-storage circuit to power supply circuits.
(3) beneficial effect
The contrast prior art, node intelligent power supply and method that technical solution of the present invention provided have following beneficial effect:
(1) this technical scheme adopts the direct power supply mode that power supply circuits are directly powered when the regenerative resource battery voltage value is higher, simultaneously the super capacitor energy-storage circuit is charged, can utilize environmental energy efficiently, add the step of energy management and control, thereby improve the efficient of using energy source and power supply supply greatly.
(2) this technical scheme adopts super capacitor to replace storage battery as energy storage device, improved the capacitance of energy reserves device greatly, also be applicable to the large current density electric process that power requirement is high, also simplify simultaneously and discharge and recharge circuit, reduce the maintenance probability, energy resource supply process safe reliability and operating efficiency are provided.
(3) this technical scheme is carried out unified Based Intelligent Control and management by microprocessor combined charge control circuit, control renewable energy source battery charges and directly power supply, circuit charging of control super capacitor energy-storage and discharge, the control power supply circuits are regulated the energy way of output; Simultaneously, also operate the super capacitor energy-storage circuit is carried out the operation that anti-overcharge and anti-mistake is put by the calculation process of microprocessor internal, the magnitude of voltage that collects is comprehensively judged, generated different power supplies and instruct Control Node to enter different powered operation patterns; This technical scheme is owing to be integrated in microprocessor internal with numerous functions, thereby reduced a large amount of dissipative cells in the circuit, makes the energy consumption reduction of device itself, saved the energy, can also reduce the maintenance work and the expense of conventional power source equipment.
In sum, node intelligent power supply that technical solution of the present invention provided and method adopt the regenerative resource power supply energy storage, adopt super capacitor to replace storage battery, and introduce the node microprocessor and control the energy consumption problem that the scheme of charging and power supply circuits solves power supply circuits itself, be the wireless sensor network node power supply efficiently; This technical scheme is gathered environmental energy constantly by the renewable energy source battery, and be that accumulator charges, guarantee the persistence of the energy, overcome and to have changed battery and the limited difficulty of the life of storage battery, solve the powerup issue of wireless sensor network node effectively, prolonged the life cycle of whole wireless sensor network.
Description of drawings
Fig. 1 is the principle schematic of the node intelligent power supply in the embodiment of the invention 1;
Fig. 2 is the charging control circuit schematic diagram of the node intelligent power supply in the embodiment of the invention 2;
Fig. 3 is the super capacitor energy-storage circuit theory diagrams of the node intelligent power supply in the embodiment of the invention 2;
Fig. 4 is the power supply circuits schematic diagram of the node intelligent power supply in the embodiment of the invention 2;
Fig. 5 is the node working mode transition diagram of the node intelligent power supply in the embodiment of the invention 2;
Fig. 6 is the flow chart of the node intelligent power supply method in the embodiment of the invention 3.
Embodiment
For making purpose of the present invention, content and advantage clearer,, the specific embodiment of the present invention is described in further detail below in conjunction with drawings and Examples.
Embodiment 1
At first the node intelligent power supply based on wireless sensor network is described in detail.
As shown in Figure 1, principle schematic for the node intelligent power supply, the node intelligent power supply comprises: renewable energy source battery 1, super capacitor energy-storage circuit 3, the charging control circuit 2 that links to each other with super capacitor energy-storage circuit 3 with renewable energy source battery 1, MCU (Micro Control Unit-micro-control unit) microprocessor 4 and the power supply circuits 5 that link to each other with charging control circuit 2, described power supply circuits 5 link to each other with renewable energy source battery 1, super capacitor energy-storage circuit 3 and MCU microprocessor 4.Wherein, renewable energy source battery 1 can be that solar cell 1a is that example describes with renewable energy source battery 1 for solar cell, vibrational energy battery, wind energy battery, thermal gradient energy battery or renewable resource that all the other obtain from natural environment in the present invention.
Solar cell 1a is used under the control of charging control circuit 2 power supply circuits 5 directly being powered and super capacitor energy-storage circuit 3 being charged;
Charging control circuit 2 is used for the magnitude of voltage of the magnitude of voltage of the instruction acquisition solar cell 1a that transmits according to MCU microprocessor 4 and super capacitor energy-storage circuit 3 and the magnitude of voltage of being gathered is fed back to microprocessor 4, the power supply of transmitting according to MCU microprocessor 4 is simultaneously instructed and is controlled solar cell 1a super capacitor energy-storage circuit 3 and power supply circuits 5 are powered, and instructs according to the power supply that MCU microprocessor 4 transmits and to control 3 pairs of power supply circuits 5 of super capacitor energy-storage circuit and power;
MCU microprocessor 4 is used for the solar cell 1a magnitude of voltage that is come by charging control circuit 2 feedback and super capacitor energy-storage circuit 3 magnitudes of voltage are carried out analog-to-digital conversion and voltage ratio than judgment processing, generates the power supply instruction and is delivered to charging control circuit 2 and power supply circuits 5 according to result;
Super capacitor energy-storage circuit 3 is used for charging under the control of charging control circuit 2 or power supply circuits 5 being powered; This super capacitor energy-storage circuit 3 comprises accumulator and voltage boosting and stabilizing circuit; This accumulator is mainly connected/is composed in parallel by one or several super capacitor monomers;
Power supply circuits 5 are used for coming node load is carried out energy support according to the power supply of power supply command reception solar cell 1a or super capacitor energy-storage circuit 3.
Wherein, described power supply instruction comprises following a few class:
First order power supply instruction: when solar cell 1a magnitude of voltage during greater than the supply power voltage threshold value that sets in advance, indication solar cell 1a directly powers to power supply circuits 5, simultaneously super capacitor energy-storage circuit 3 is charged;
Second level power supply instruction: when solar cell 1a magnitude of voltage during greater than the supply power voltage threshold value that sets in advance, and when super capacitor energy-storage circuit 3 magnitudes of voltage reach the charging voltage threshold value that sets in advance, indication charging control circuit 2 is closed the charging operations to super capacitor energy-storage circuit 3, and solar cell 1a only carries out the directly operation of power supply of power supply circuits 5 simultaneously;
Third level power supply instruction: be lower than the supply power voltage threshold value that sets in advance when solar cell 1a magnitude of voltage, and super capacitor energy-storage circuit 3 magnitudes of voltage are when being higher than the first or second discharge voltage threshold value that sets in advance, and 3 pairs of power supply circuits 5 of indication super capacitor energy-storage circuit are powered;
The 4th class power supply instruction: be lower than the supply power voltage threshold value that sets in advance when solar cell 1a magnitude of voltage, and when super capacitor energy-storage circuit 3 magnitudes of voltage were lower than the minimum discharge voltage threshold value that sets in advance, indication charging control circuit 2 stopped the powered operation of 3 pairs of power supply circuits 5 of super capacitor energy-storage circuit.
Embodiment 2
Following mask body is introduced the concrete composition module and the operation principle of node intelligent power supply related among the embodiment 1.
Solar cell 1a comprises miniature single-crystalline-silicon solar-cell panel; Miniature single-crystalline-silicon solar-cell panel is a kind ofly solar energy can be converted into the semiconductor photo diode of electric energy by photovoltaic effect, and when solar irradiation was to photodiode, photodiode will become electric energy to the luminous energy of the sun, produced electric current; Solar cell 1a gathers solar energy and artificial luminous energy and is converted into electric energy by photoelectric effect, producing 5v left and right sides voltage and by the direct power supply technology priority power supply circuits 5 are directly powered under the control of charging control circuit 2, is 3 chargings of super capacitor energy-storage circuit by charging control circuit 2 simultaneously; When being together in series or parallel, many solar cell 1a just can become the solar cell array that bigger power output is arranged.
As shown in Figure 2, be the charging control circuit schematic diagram of node intelligent power supply, gather the magnitude of voltage V of solar cell 1a behind the charging controlling command C_CHR as charging control circuit 2 reception MCU microprocessors 4 S_INThrough Schottky rectifier D 1Generate charging voltage V CHRBe 3 chargings of super capacitor energy-storage circuit.
As shown in Figure 3, be the super capacitor energy-storage circuit theory diagrams of node intelligent power supply, as shown in Figure 3, super capacitor energy-storage circuit 3 adopts novel super capacitor, is made of accumulator 31 and voltage boosting and stabilizing circuit 32 two parts.
In the accumulator 31, charging voltage V CHRBy current-limiting resistance R 5Fill diode D with counnter attack 2Be the super capacitor charging, produce super capacitor energy-storage circuit 3 magnitude of voltage V C_BATUltracapacitor monomer storage power is limited and withstand voltage not high, needs by corresponding polyphone and linked method dilatation, to be applicable to different application.Suppose accumulator 31 with m series connection, n group mode in parallel constitutes, and then the energy of each accumulator 31 is output as Wherein C is the monomer capacitance of super capacitor, U MaxThe magnitude of voltage of finishing for monomer super capacitor charging, U Ic_minLowest starting voltage for chip.So the energy of super capacitor array always is output as W All=mnW.Its equivalent series internal resistance Equivalent capacity is N wherein sBe serializer number of packages, N pBe the parallel branch number, gRs refers to the internal resistance of single super capacitor, and gC is the capacitance of single super capacitor.Present embodiment adopts the monomer series-connected formation accumulator 31 of super capacitor of two 2.3V, gets final product if will enlarge connection in series-parallel quantity and the relevant chip that its range of application only need change super capacitor.
In the voltage boosting and stabilizing circuit 32, because along with super capacitor work is constantly discharged, the voltage at its two ends will constantly reduce, when super capacitor discharges 50% energy of energy storage, its terminal voltage will drop to 70% of initial voltage, the controlling circuit of voltage regulation that need boost is accordingly avoided because the reduction of super capacitor array voltage influences the normal operation of load, improves the utilance of super capacitor energy-storage.By the DC-DC voltage stabilizing chip that boosts, add an inductance L, a Schottky diode D 3With an output capacitance C 1Just can provide stable output voltage V C_BRAccording to the boost databook of voltage stabilizing chip of DC-DC, select suitable inductance, electric capacity and Schottky diode can obtain high conversion efficiency.
As the core of present embodiment technical scheme, MCU microprocessor 4 is used for transmission and instructs to charging control circuit 2, gathers solar cell 1a magnitude of voltage V by charging control circuit 2 S_INMagnitude of voltage V with super capacitor energy-storage circuit 3 C_BAT,, draw the power supply instruction according to result through a series of processing such as inner modulus commentaries on classics, voltage judgements.If the magnitude of voltage V of solar cell 1a S_INDuring greater than the supply power voltage threshold value that sets in advance (electing 4V herein as), MCU microprocessor 4 sends and comprises charging control signal C_CHR and the power supply instruction of exporting control signal C_OUT; This charging control signal C_CHR opens the path of charging control circuit 2 and super capacitor energy-storage circuit 3, guarantees the carrying out of charging, and this output control signal C_OUT control solar cell 1a is to the direct power supply of power supply circuits 5; If the magnitude of voltage V of solar cell 1a S_INDuring less than the supply power voltage threshold value that sets in advance (electing 4V herein as), and the magnitude of voltage V of super capacitor energy-storage circuit 3 C_BATAlso be higher than the minimum discharge threshold value V that sets in advance D_thThe time, then MCU microprocessor 4 just sends the power supply instruction that comprises output control signal C_OUT, and the energy pathway of super capacitor energy-storage circuit 3 to power supply circuits 5 opened in control, handles through the voltage stabilizing of power supply circuits 5, as the power supply energy of node.
As shown in Figure 4, be the power supply circuits schematic diagram of node intelligent power supply, power supply circuits 5 connect solar cell 1a output V S_INOutput V with super capacitor energy-storage circuit 3 C_BR, receive the power supply instruction that comprises output control signal C_OUT of MCU microprocessor 4, with solar cell 1a and super capacitor energy-storage circuit 3 the two one of voltage handle through voltage stabilizing after, export to node load and power.If MCU microprocessor 4 is selected solar cell 1a output V S_INDirect power supply, then control signal C_OUT just controls power supply circuits 5 voltage stabilizing chips to solar cell 1a output V S_INCarry out voltage stabilizing and handle, the voltage after the processing is just as V C_OUTThe output power supply, control signal C_OUT is through inverter D simultaneously 5The power supply output channel of super capacitor energy-storage circuit 3 is blocked in control; In like manner, if select the 3 power supply outputs of super capacitor energy-storage circuit, control signal C_OUT acts on triode Q 4With field effect transistor Q 5, get through V C_BROutput channel, make V C_BRAs V C_OUTThe output power supply, solar cell 1a output this moment V S_INSupply access blocks.
Further, when the 3 discharge outputs of super capacitor energy-storage circuit, MCU microprocessor 4 is gathered the magnitude of voltage V of super capacitor energy-storage circuit 3 by charging control circuit 2 C_BAT, by judging whether to reach the charging voltage threshold value V that sets in advance C_th, just send charging control signal C_CHR charging control circuit 2 turn-offed, to reach the purpose that prevents that super capacitor energy-storage circuit 3 from overcharging.
Further, when the 3 discharge outputs of super capacitor energy-storage circuit, MCU microprocessor 4 is gathered the magnitude of voltage V of super capacitor energy-storage circuit 3 by charging control circuit 2 C_BAT, by judging whether to be lower than the minimum discharge voltage threshold value V that sets in advance D_th, if be lower than, the power supply that MCU microprocessor 4 just stops power supply circuits 5 by output control signal C_OUT control super capacitor energy-storage circuit 3 reaches the purpose that prevents that super capacitor energy-storage circuit 3 from putting excessively.
In addition, MCU microprocessor 4 is gathered solar cell 1a magnitude of voltage V by charging control circuit 2 S_INWith super capacitor energy-storage circuit 3 magnitude of voltage V C_BATBy the energy state analysis, according to the energy abundance, energy is good, energy is medium, energy is nervous, faint these the 5 kinds different energy state Control Node of energy enter 5 kinds of different-energy states such as AM0, AM1, AM2, AM3, AM4 and node working mode corresponding mode of operation, as shown in the table:
As above shown in the table,, directly power, and be the charging of super capacitor energy-storage circuit, V by solar cell as if the solar energy abundance S_IN〉=4V (the supply power voltage threshold value that sets in advance), electric supply installation energy abundance then, this moment, the mode of operation of node was AM0, the radio node efficient operation; If owing to reasons such as environment, extraneous solar energy source is not really sufficient, super capacitor energy-storage circuit discharging, V C_BAT〉=4V (the first discharge voltage threshold value that sets in advance), then the power supply device energy is good, and the mode of operation of node is AM1, but the node operate as normal; If by the super capacitor energy-storage circuit discharging, 3.5V (the second discharge voltage threshold value that sets in advance)≤V C_BAT≤ 4V (the first discharge voltage threshold value that sets in advance), the power supply device energy remains to be replenished, and this moment, the mode of operation of node was AM2, and the node under this mode of operation can only be as leaf node work; If the super capacitor energy-storage circuit discharging, V D_th(the minimum discharge voltage thresholding that sets in advance)≤V C_BAT≤ 3.5V (the second discharge voltage threshold value that sets in advance), the power supply device energy is in short supply, and this moment, the mode of operation of node was AM3, reduced number of communications between the MCU Control Node, closed unnecessary peripheral circuit, only the necessary acquisition function of operation; If the super capacitor energy-storage circuit discharging, voltage V C_BAT≤ V D_th(the minimum discharge voltage thresholding that sets in advance), then the power supply device energy is faint, and this moment, node energy was faint, and mode of operation is AM4, and the node power down is not worked, and waits for that energy recovers.
As shown in Figure 5, node working mode transition diagram for the node intelligent power supply, because charge and discharge process all has the regular hour, so the conversion of each mode of operation changes gradually according to the state of energy, therefore the change of mode of operation also is incremental, according to the energy abundance, energy is good, energy is medium, energy is nervous, energy is faint, node enters AM0, AM1, AM2, AM3, these 5 kinds of mode of operations of AM4 successively; Faint according to energy, energy is nervous, energy is medium, energy is good, energy is sufficient, node enters AM4, AM3, AM2, AM1, these 5 kinds of mode of operations of AM0 successively.
Further, the MCU microprocessor 4 of this device adopts little process chip of node self, does not add outside MCU element, has really realized the intelligentized energy management of node, make this device under the energy requirement instruction of node, to work, cooperate the real work demand of node more efficiently.
Embodiment 3
Following mask body is introduced the idiographic flow of the node intelligent power supply method of node intelligent power supply related in Application Example 1 and 2.
As shown in Figure 6, this method comprises the steps:
Step 1:MCU microprocessor 4 power-up initializings, and software and hardware initialization; Set the supply power voltage threshold value (being set to 4V herein) of solar cell 1a simultaneously, and the first discharge voltage threshold value (being set to 4V herein) of super capacitor energy-storage circuit 3, the second discharge voltage threshold value (being set to 3.5V herein) and minimum discharge voltage threshold value V D_th
Step 2:MCU microprocessor 4 is gathered the magnitude of voltage V of solar cell 1a by charging control circuit 2 S_INAnd the magnitude of voltage V of super capacitor energy-storage circuit 3 C_BAT
The magnitude of voltage V of 4 couples of solar cell 1a of step 3:MCU microprocessor S_INAnd the magnitude of voltage V of super capacitor energy-storage circuit 3 C_BATCarry out analog-to-digital conversion and voltage comparison process, control solar cell 1a according to result generation power supply instruction super capacitor energy-storage circuit 3 and power supply circuits 5 are powered simultaneously; Perhaps,
Power according to 3 pairs of power supply circuits 5 of power supply commands for controlling super capacitor energy-storage circuit;
Step 4: the power supply of accepting solar cell 1a or super capacitor energy-storage circuit 3 according to power supply commands for controlling power supply circuits 5 comes node load is carried out energy support.
Wherein, power supply instruction comprises: the charging control signal C_CHR that control solar cell 1a charges to super capacitor energy-storage circuit 3, and the output control signal C_OUT that powers of control solar cell 1a or 3 pairs of power supply circuits 5 of super capacitor energy-storage circuit;
Wherein, in the step 2:
Magnitude of voltage V as solar cell 1a S_INDuring greater than the supply power voltage threshold value that sets in advance (being set to 4V herein), MCU microprocessor 4 charges to super capacitor energy-storage circuit 3 by sending charging control signal C_CHR indication solar cell 1a, power supply circuits 5 are directly powered the output voltage V of solar cell 1a by sending output control signal C_OUT control solar cell 1a simultaneously S_INAfter voltage stabilizing, as power supply output V C_OUTExport node load to, node enters the AM0 mode of operation simultaneously;
Magnitude of voltage V as solar cell 1a S_INDuring greater than the supply power voltage threshold value that sets in advance (being set to 4V herein), and super capacitor energy-storage circuit 3 magnitude of voltage V C_BATReach the charging voltage threshold value V that sets in advance C_thThe time, indication charging control circuit 2 is closed the charging operations to super capacitor energy-storage circuit 3, and the renewable energy source battery only carries out the directly operation of power supply of power supply circuits simultaneously;
If owing to reasons such as environment, extraneous solar energy source is not really sufficient, as solar cell 1a magnitude of voltage V S_INBe lower than the supply power voltage threshold value (being set to 4V herein) that sets in advance, and super capacitor energy-storage circuit 3 magnitude of voltage V C_BATWhen being higher than the first discharge voltage threshold value (being set to 4V herein) that sets in advance, then indicate the super capacitor energy-storage circuit that power supply circuits are powered, this moment, node entered the AM1 mode of operation;
When solar cell 1a magnitude of voltage is lower than the supply power voltage threshold value that sets in advance, this moment, the super capacitor energy-storage circuit 3 was under the discharge condition super capacitor energy-storage circuit 3 magnitude of voltage V C_BATBe higher than the second discharge voltage threshold value (being set to 3.5V herein) that sets in advance, and be lower than the first discharge voltage threshold value (being set to 4V herein) that sets in advance, the power supply device energy remains to be replenished, this moment, the mode of operation of node was AM2, and the node under this mode of operation can only be as leaf node work;
When solar cell 1a magnitude of voltage is lower than the supply power voltage threshold value that sets in advance, this moment, the super capacitor energy-storage circuit 3 was under the discharge condition, if super capacitor energy-storage circuit 3 magnitude of voltage V C_BATBe higher than the minimum discharge voltage threshold value V that sets in advance D_th, and being lower than the second discharge voltage threshold value (being set to 3.5V herein) that sets in advance, the power supply device energy is in short supply, this moment, the mode of operation of node was AM3, reduce number of communications between the MCU Control Node, close unnecessary peripheral circuit, only the necessary acquisition function of operation;
When solar cell 1a magnitude of voltage is lower than the supply power voltage threshold value that sets in advance, this moment, the super capacitor energy-storage circuit 3 was under the discharge condition, if super capacitor energy-storage circuit 3 magnitude of voltage V C_BATBe lower than the minimum discharge voltage threshold value V that sets in advance D_th, then the power supply device energy is faint, and the indication charging control circuit stops the powered operation of super capacitor energy-storage circuit to power supply circuits, and this moment, node energy was faint, and mode of operation is AM4, the node power down is not worked, and waits for that energy recovers.
The above only is a preferred implementation of the present invention; should be pointed out that for those skilled in the art, under the prerequisite that does not break away from the technology of the present invention principle; can also make some improvement and distortion, these improvement and distortion also should be considered as protection scope of the present invention.

Claims (9)

1. node intelligent power supply based on wireless sensor network, it is characterized in that, described electric supply installation comprises renewable energy source battery, super capacitor energy-storage circuit, the charging control circuit that links to each other with described super capacitor energy-storage circuit with described renewable energy source battery and microprocessor and the power supply circuits that link to each other with described charging control circuit, and described power supply circuits link to each other with described renewable energy source battery, described super capacitor energy-storage circuit and described microprocessor; Wherein,
Described renewable energy source battery is used under the control of described charging control circuit described power supply circuits directly being powered and described super capacitor energy-storage circuit being charged;
Described charging control circuit, be used for the instruction acquisition of transmitting according to described microprocessor and feed back to the magnitude of voltage of the described renewable energy source battery of microprocessor and the magnitude of voltage of described super capacitor energy-storage circuit, simultaneously the described renewable energy source battery of power supply commands for controlling that transmits according to described microprocessor is powered to described super capacitor energy-storage circuit and power supply circuits, and instructs according to the power supply that described microprocessor transmits and to control described super capacitor energy-storage circuit described power supply circuits are powered;
Described microprocessor, be used for the regenerative resource battery voltage value and the super capacitor energy-storage circuit voltage value of being come by described charging control circuit feedback are handled, generate the power supply instruction and be delivered to described charging control circuit and described power supply circuits according to result;
Described super capacitor energy-storage circuit is used for charging under the control of described charging control circuit or described power supply circuits being powered;
Described power supply circuits are used for coming node load is carried out energy support according to the power supply of described renewable energy source battery of described power supply command reception or described super capacitor energy-storage circuit.
2. the node intelligent power supply based on wireless sensor network as claimed in claim 1, it is characterized in that described renewable energy source battery is solar cell, vibrational energy battery, wind energy battery, thermal gradient energy battery or renewable resource that all the other obtain from natural environment.
3. the node intelligent power supply based on wireless sensor network as claimed in claim 1 is characterized in that described super capacitor energy-storage circuit comprises accumulator and voltage boosting and stabilizing circuit;
Described accumulator is connected/is composed in parallel by one or several super capacitor monomers.
4. the node intelligent power supply method based on wireless sensor network is characterized in that described method comprises the steps:
Step 1: gather the magnitude of voltage of renewable energy source battery and the magnitude of voltage of super capacitor energy-storage circuit;
Step 2: the magnitude of voltage of described renewable energy source battery and the magnitude of voltage of super capacitor energy-storage circuit are handled, controlled the renewable energy source battery according to result generation power supply instruction super capacitor energy-storage circuit and power supply circuits are powered simultaneously; Perhaps,
According to described power supply commands for controlling super capacitor energy-storage circuit power supply circuits are powered;
Step 3: the power supply of accepting renewable energy source battery or super capacitor energy-storage circuit according to described power supply commands for controlling power supply circuits comes energy support is carried out in load.
5. the node intelligent power supply method based on wireless sensor network as claimed in claim 4 is characterized in that, described regenerative resource battery voltage value and super capacitor energy-storage circuit voltage value are by the charging control circuit collection and feed back to microprocessor;
Described power supply instruction is carried out analog-to-digital conversion and voltage ratio according to described microprocessor to described regenerative resource battery voltage value and super capacitor energy-storage circuit voltage value and is generated than the result of judgment processing.
6. as each described node intelligent power supply method of claim 4-5, it is characterized in that based on wireless sensor network, in the described step 2,
When regenerative resource battery voltage value during greater than the supply power voltage threshold value that sets in advance, microprocessor sends power supply instruction indication renewable energy source battery power supply circuits is directly powered, and simultaneously the super capacitor energy-storage circuit is charged.
7. as each described node intelligent power supply method of claim 4-5, it is characterized in that based on wireless sensor network, in the described step 2,
When regenerative resource battery voltage value during greater than the supply power voltage threshold value that sets in advance, and when super capacitor energy-storage circuit voltage value reaches the charging voltage threshold value that sets in advance, microprocessor transmission power supply instruction indication charging control circuit is closed the charging operations to the super capacitor energy-storage circuit, and the renewable energy source battery only carries out the operation to the direct power supply of power supply circuits simultaneously.
8. as each described node intelligent power supply method of claim 4-5, it is characterized in that based on wireless sensor network, in the described step 2,
Be lower than the supply power voltage threshold value that sets in advance when the regenerative resource battery voltage value, and super capacitor energy-storage circuit voltage value is when being higher than the first or second discharge voltage threshold value that sets in advance, and microprocessor sends power supply instruction indication super capacitor energy-storage circuit power supply circuits are powered.
9. as each described node intelligent power supply method of claim 4-5, it is characterized in that based on wireless sensor network, in the described step 2,
Be lower than the supply power voltage threshold value that sets in advance when the regenerative resource battery voltage value, and when super capacitor energy-storage circuit voltage value was lower than the minimum discharge voltage threshold value that sets in advance, microprocessor sent power supply instruction indication charging control circuit and stops the powered operation of super capacitor energy-storage circuit to power supply circuits.
CN2010102613327A 2010-08-24 2010-08-24 Device and method for intelligently supplying power to node based on wireless sensor network Pending CN101951033A (en)

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CN104092289A (en) * 2014-08-06 2014-10-08 广东电网公司珠海供电局 Ammeter
CN106549475A (en) * 2015-09-21 2017-03-29 卡孚特能源技术(深圳)有限公司 A kind of wireless senser power supply unit based on semi-conductor thermo-electric generation module
CN106781126A (en) * 2016-12-08 2017-05-31 苏州市职业大学 A kind of piezoelectric type wireless doorbell and its method of supplying power to
CN107658942A (en) * 2017-10-27 2018-02-02 华立科技股份有限公司 Power supply circuit and intelligent electric meter based on RTC

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