CN201868918U - Self-generating wireless sensor network node power supply management system based on piezoelectricity - Google Patents
Self-generating wireless sensor network node power supply management system based on piezoelectricity Download PDFInfo
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- CN201868918U CN201868918U CN2010206328835U CN201020632883U CN201868918U CN 201868918 U CN201868918 U CN 201868918U CN 2010206328835 U CN2010206328835 U CN 2010206328835U CN 201020632883 U CN201020632883 U CN 201020632883U CN 201868918 U CN201868918 U CN 201868918U
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Abstract
The utility model discloses a self-generating wireless sensor network node power supply management system based on piezoelectricity, comprising a first control switch, a main energy storage device and a second control switch which are connected in sequence, as well as a third control switch, an auxiliary energy storage device and a fourth control switch which are connected in sequence, and a power monitoring and managing device and a wireless sensor network node. As for the utility model, not only is the problem of energy supply and management of the wireless sensor network node effectively solved, but also the operating reliability of the wireless sensor network node is improved, and the effects of energy conservation and environmental protection are achieved.
Description
Technical field
The utility model relates to power supply, is specifically related to the wireless sensor network node power-supply management system based on the piezoelectric self electricity.
Background technology
Power supply is extremely important in whole wireless sensor network system design.Modal at present, also be the easiest realization the wireless sensor network node supply power mode mainly or powered battery.Because the life-span of common batteries is limited,, need a large amount of replacing battery regularly in order to guarantee the radio sensing network node operate as normal.So not only workload is big, and the cost height is wasted also serious; In a lot of application scenarios, wireless sensor network node mostly is at random greatly and lays in addition, and owing to environment reason such as abominable or node motion, it is extremely inconvenient to change battery.
Abundant solar energy is the energy inexhaustible, pollution-free, cheap, that the mankind can make full use of, but have required illumination requirement complexity at present, floor space is big, optoelectronic transformation efficiency is low and problem such as photovoltaic generation cost height.As for wind power generation, its advantage is outstanding, and the wind energy resources amount is of fine quality greatly, but stability is low, continuity and poor reliability, and spatial and temporal distributions inequality.Because these restrictions, Chinese scholars is being sought long-life power source supply method, and electric energy is obtained in wherein a kind of sustained vibration from surrounding environment exactly.
Along with development of electronic technology, the new ambient vibration energy---the piezoelectric self electric energy arises at the historic moment.Because piezoelectric self electric energy device is with respect to other miniature power generating devices, have simple in structure, do not generate heat, advantage such as no electromagnetic interference, therefore the piezoelectric self electric installation is widely used in different field, thereby make it become focus in the self-power supply system research field, arranged wide development prospect in actual applications, also opened up new way simultaneously for the wireless sensor network node energy.
Summary of the invention
Technical problem to be solved in the utility model is: a kind of wireless sensor network node power-supply management system based on the piezoelectric self electricity is provided, and this system can stablize to wireless sensor network, power supply constantly, and convenient management has improved system reliability.
The utility model solves its technical problem and adopts following technical scheme: based on the wireless sensor network node power-supply management system of piezoelectric self electricity, comprise first control switch, main energy accumulating device, second control switch that link to each other successively, and the 3rd control switch, auxiliary energy storage device, the 4th control switch that link to each other successively, and power supply monitoring and management devices and wireless sensor network node; Energy takes place to link to each other with the auxiliary energy storage device with main energy accumulating device with the 3rd control switch by first control switch respectively with harvester, the output of second control switch and the 4th control switch all links to each other with wireless sensor network node, and power supply monitoring all links to each other with main energy accumulating device, auxiliary energy storage device, first control switch, second control switch, the 3rd control switch and the 4th control switch with management devices.
The utility model organically combines energy acquisition technology, store energy technology and power management techniques, and is designed to the technical scheme of power conversion, storage device and energy management, therefore, compared with prior art mainly contains following advantage:
One. set up the clean energy resource of sustainable use: owing to adopted the technical scheme of piezoelectric vibration power generation, institute thinks that the sustainable utilization clean energy resource opened up an effective passage.
They are two years old. and solved the problem of energy shortage: owing to set up the clean energy resource of sustainable use, the requirement that makes wireless sensor network node need stablize continued power is met, thereby can guarantee that whole wireless sensor network system normally moves.
They are three years old. convenient management: owing to set up the clean energy resource of sustainable use, wireless sensor network node energy power supply management problem is become simply, easily operation.
They are four years old. improved the reliability of wireless sensor network node work.
The wireless sensor network node power-supply management system that the utility model is primarily aimed at based on the piezoelectric self electricity designs, and has solved the energy conservation problem, and continuable clean energy resource is provided, and has improved the reliability of wireless sensor network node work.
Description of drawings
Fig. 1 is the schematic diagram of the utility model general structure.
Fig. 2 is that energy produces and acquisition principle figure.
Fig. 3 is that energy produces and the Acquisition Circuit schematic diagram.
Fig. 4 is the circuit theory diagrams with the auxiliary energy storage device.
Fig. 5 is the chip monitoring in power supply monitoring and the management devices and the circuit theory diagrams of four control switchs.
Fig. 6 is the Fundamentals of Mono-Chip Computers figure in power supply monitoring and the management devices.
Fig. 7 circuit theory diagrams that to be the energy generation interconnect mutually with harvester, first control switch, main energy accumulating device, the 3rd control switch, auxiliary energy storage device.
Embodiment
At present, the useful life of wireless sensor network node supplying cell is short and change difficult, in order to improve the supply power mode of wireless sensor network node, solve the power source dynamic management problem in the power supply, a kind of wireless sensor network node power-supply management system based on the piezoelectric self electricity is provided.
The wireless sensor network node power-supply management system that the utility model provides based on the piezoelectric self electricity, its structure is as depicted in figs. 1 and 2: comprise first control switch that links to each other successively, main energy accumulating device, second control switch, the 3rd control switch of Xiang Lianing successively, the auxiliary energy storage device, the 4th control switch, and power supply monitoring and management devices and wireless sensor network node, wherein: energy takes place to link to each other with the auxiliary energy storage device with main energy accumulating device with the 3rd control switch by first control switch respectively with harvester, second control switch and the 4th control switch output all link to each other with wireless sensor network node.Power supply monitoring links to each other with main energy accumulating device, auxiliary energy storage device respectively with management devices, and power supply monitoring and management devices are controlled the switching of first control switch, second control switch, the 3rd control switch and the 4th control switch respectively.
Characteristics such as it is little that described four control switchs have via resistance, and input voltage range is big, and is low in energy consumption, therefore can adopt model is the cmos switch of TS5A3357.As shown in Figure 5, chip S1～S4 is followed successively by first～the 4th control switch, and the 8th pin of four chips is all by lithium battery LI-ION power supply, the equal ground connection of the 4th pin of four chips.The 7th, 1 pin of chip S1～S4 is connected to the two ends of corresponding control bit respectively.The 5th pin of chip S1 is connected to the P3.7 pin (the 18th pin of U3 among Fig. 6) of chip U3, and the 6th pin is connected to the P3.6 pin (the 17th pin of U3) of chip U3.The 5th pin of chip S2 is connected to the P3.3 pin (the 14th pin of U3) of chip U3, and the 6th pin is connected to the P3.2 pin (the 13rd pin of U3) of chip U3.The 5th pin of chip S3 is connected to the P3.1 pin (the 12nd pin of U3) of chip U3, and the 6th pin is connected to the P3.0 pin (the 11st pin of U3) of chip U3.The 5th pin of chip S4 is connected to the P3.5 pin (the 16th pin of U3) of chip U3, and the 6th pin is connected to the P3.4 pin (the 15th pin of U3) of chip U3.
The structure of described energy generation and harvester comprises piezoelectric self electric unit (claiming the piezoelectric ceramic generator unit again), bridge rectifier, capacitor filter, voltage stabilizing didoe and DC-DC converting means as shown in Figure 2.Bridge rectifier adopts four diodes, be divided into two groups, every group all comprises two diodes that forward connect, the anode of two groups of diodes is connected to each other with negative contact again is in the same place, if the joint between every group of two diode is respectively 1,3, the joint of anode interconnect is that the joint of cathode interconnect between 4, two groups is 2 between two groups; The two ends of piezoelectric self electric unit are connected to joint 1 and 3 respectively, joint 4 ground connection, and 2 of joints are connected to capacitor filter; Capacitor filter adopts polar capacitor C1, and its positive pole is connected to joint 2, other end ground connection; Voltage stabilizing didoe D1 and capacitor C 1 also connect, and the negative electrode of D1 is connected to the positive pole of capacitor C 1, other end ground connection; The two ends of diode D1 are connected to the two ends of DC-DC converter U1 respectively.
As shown in Figure 7, the 8th pin of chip U1 is connected to positive pole and the VDD output of super capacitor C5 by first control switch, the other end ground connection of capacitor C 5, and the 7th pin of chip U1 also is connected to first control switch by resistance R 12.The 7th pin of chip U1 also is connected to the 2nd pin of chip U2 by resistance R 12, the 3rd control switch.The 7th pin of chip U1 is successively by resistance R 12, R2, R3 ground connection.The 6th pin of chip U1 is connected between resistance R 2, the R3.
Wherein: the piezoelectric ceramic generator unit has produced electric charge under the vibration of external environment or extrusion, the alternating voltage of its output obtains direct voltage through bridge rectifier, capacitor filter and voltage stabilizing didoe, this direct voltage offers the voltage input end of DC-DC converting means, by regulating the operating state of DC-DC converting means, make the power-supply system of the utility model management reach maximum power output.
The selection of piezoelectric ceramic should have the good performance of accepting, even mechanical energy is converted to electric energy.During design piezoelectric self electric unit, piezoelectric ceramic should have that electromechanical coupling factor K is big, mechanical quality factor Qm greater than 500, relative dielectric constant ε less than 1500, little, the piezoelectric voltage constant g height of piezoelectric strain constant d, temperature T c characteristic such as outside operating temperature range.
In the described bridge rectifier, voltage stabilizing didoe (Fig. 3) requires its forward conduction voltage drop as far as possible little, and therefore can adopt model is 1N60P or 1N5711 rectifier diode.With 1N5711 is example, forward conduction voltage drop VF=0.41V when the inverse peak voltage VRM=60V of 1N5711 diode, little electric current, maximal integer mass flow electric current I
F=15mA, reverse current I
R=200nA, reverse recovery time t
Rr=1.0ns, junction capacitance C
D=2.0pF.
Electric capacity in the capacitor filter need suitably be chosen, and selects for use capacitance too small, and the electric capacity energy stored may be not enough, and after the storage capacitor power supply, voltage constantly descends along with the loss of electric charge, can make the load cisco unity malfunction; Capacitance is excessive, and capacitance voltage reaches the overlong time of steady-state value, has reduced the efficient of collecting energy on the one hand, and on the other hand, the series direct current equivalent resistance of big electric capacity is corresponding also bigger, can increase the efficient that power consumption reduces circuit.In addition, select the little polar capacitor of series direct current equivalent resistance.Present embodiment is selected the tantalum electric capacity of AVX100 μ F/16V, and model is the D type.Tantalum electric capacity has that volume is little, the serviceability temperature wide ranges, the life-span is long, insulation resistance is high, leakage current is little, impedance frequency characteristic is good, the reliability advantages of higher.
In the voltage stabilizing circuit, its amplitude limit should be selected respective model for use according to DC-DC converting means required input voltage with voltage stabilizing didoe, plays the effect of protection DC-DC converter.The voltage stabilizing didoe model that present embodiment is used is an IN47 series, and for example model is the voltage stabilizing didoe of IN4735.When operating voltage during much smaller than stable voltage, this voltage stabilizing didoe is inoperative; During only greater than stable voltage, just play the effect of protection DC-DC converting means, prevent because of the too high DC-DC of the damage converting means of input voltage.The model of the DC-DC chip in this device is to determine according to the needs of the voltage and current of energy storing device.It is MAX666 (U1) that present embodiment adopts the model of DC-DC chip, and its peripheral circuit is simple, can work output voltage stabilization, characteristics such as low in energy consumption under the state of low current.
The working method of piezoelectric ceramic generator unit is: the AC energy that this generator unit transforms, through bridge rectifier rectification, capacitor filter filtering, after IN4735 voltage stabilizing didoe amplitude limit, obtain stable direct current supply voltage, this voltage offers the voltage input end of DC-DC converting means, by regulating the operating state of DC-DC converting means, the power-supply system that the utility model is managed reaches maximum power output.IN4735 voltage stabilizing didoe power is 1W, has the voltage regulation result of 6.2V, and when operating voltage during much smaller than 6.2V, this voltage stabilizing didoe is inoperative; During only greater than 6.2V, just play the effect of protection DC-DC converting means.
The working method of DC-DC converting means is: it is output as main energy accumulating device charging, should select the DC-DC converter of different model according to the difference of main energy accumulating device for use for this reason.The DC-DC converter chip that is adopted, peripheral circuit is simple, can under low current condition, work, output voltage stabilization, and have low in power consumption.In the present embodiment, adopt buck DC-DC converter, it is suitably chosen according to main energy accumulating device and the desired charging voltage of auxiliary energy storage device, size of current.
Described main energy accumulating device can adopt super capacitor, and the super capacitor model can be selected according to piezo-electric generating unit generating capacity size, and requirement can catch the energy of piezoelectric self electric unit, powers to wireless sensor network node.Super capacitor also has its special advantages, and it is little mainly to show as volume, and capacity is big, and capacitance is than big 30～40 times with volume electrochemical capacitor capacity; Charging rate is fast, reaches 95% of rated capacity in 10 seconds; Charging and discharging capabilities is strong; Lost efficacy and open a way, overvoltage does not puncture, and is safe and reliable; Extra long life was more than 400,000 hours; It is simple to discharge and recharge circuit, need not the such charging circuit of rechargeable battery, really non-maintaining; Voltage range is 2.7V to 12.0V; Range of capacity is 0.1F to 1000F.
The charging of super capacitor and discharge are to realize that by the ion motion in the electrolyte this store energy process is compared based on the process of chemical reaction with battery technology, without any the combination or the disconnection of chemical bond.Prove after 1,000,000 charge and discharge cycle that the cycle life of super capacitor reduces very faint.In addition, super capacitor is by the electrolyte work in the polarization high specific surface area electrode, and the characteristic of electrolyte, electrode and insolated layer materials has determined the capacitance performance of super capacitor.The electrode of its surface area and little charged ion have determined high capacitance, and electrolyte, separator and material efficiently, and technological design has determined low impedance.During concrete enforcement, as shown in Figure 3: when outer bound pair piezoelectric self electric unit carries out exciting, potsherd flexural deformation, by direct piezoelectric effect as can be known, piezoelectric ceramic output alternation electric charge, alternating current directly is stored in the super capacitor by behind full-bridge rectifier rectification, filtering voltage regulation and the voltage transformation, is the radio sensing network node power supply behind the full electricity of super capacitor storage.
Described auxiliary energy storage device adopts rechargeable battery, as lithium ion battery, lithium ion battery has advantages such as volume is little, environmental suitability is strong, flash-over characteristic is stable, cost is low, pollution-free, and capacity of lithium ion battery is big, memory-less effect, environment-friendly advantage is obvious.As shown in Figure 4, when specifically implementing, aforementioned energy also need be by the modular circuit that is made of lithium ion cell charging special chip LTC1733 (U2) after the conversion of DC-DC converting means, and to lithium ion cell charging, requiring output voltage is 4.1V.The input voltage range of U2 is 4.5V-6.5V, and output voltage is that 4.1V or 4.2V are adjustable, and special use comes to lithium ion cell charging.Voltage when lithium ion battery will provide on the one hand all chip operate as normal in the power-supply management system also will be powered to wireless sensor network node under the situation that main store energy and electric supply installation can not be powered on the other hand.
As Fig. 4 and shown in Figure 7, the 2nd, 8 pins of chip U2 are by capacitor C 2 ground connection, and the 4th pin is by capacitor C 3 ground connection, 5th, 6 pin ground connection, the 7th pin is by resistance R 1 ground connection, and the 9th pin is connected to the positive pole of lithium battery LI-ION, the other end ground connection of lithium battery LI-ION.The positive pole of lithium battery LI-ION is connected to external output VDC.
Described power supply monitoring and management devices are cores of the present utility model, this system monitors in real time to the electric weight of main energy accumulating device and the collection of auxiliary energy storage device, monitoring parameter is through microprocessor control unit collection and processing, according to the monitoring result, select the control corresponding switch, realize reliable power supply wireless sensor network node.Be provided with chip monitoring ICL7665 (U6 among Fig. 5) in this system.
As shown in Figure 5, the 1st pin of chip U6 is connected to the P2.2 port (seeing Fig. 6, the 10th pin of U3) of chip U3, and the 3rd pin is connected to mutually between the resistance R 7, R8 of polyphone, the other end ground connection of resistance R 8, the other end of resistance R 7 are connected to the vdd voltage output (see figure 7) of super capacitor C5.The 6th pin of chip U6 is connected to mutually between the resistance R 9, R10 of polyphone, the voltage output end VDC of the lithium battery LI-ION that the other end of resistance R 9 is connected to, the other end ground connection of resistance R 10.The 7th pin of chip U6 is connected to the P2.1 port (seeing Fig. 6, the 9th pin of U3) of chip U3.The 8th pin of chip U6 is then by lithium battery LI-ION power supply.
Described chip monitoring ICL7665 (U6) is a kind of low-power consumption chip that the voltage at super capacitor and lithium ion battery two ends is monitored in real time, and this chip can well be monitored energy accumulating device.This chip operating voltage grade is 1.6V-16V, and there are two comparators its inside.In the peripheral circuit of ICL7665, the selection of resistance R 7, R8, R9, R10 is by the upper limit threshold voltage VH at super capacitor two ends and lower threshold voltage VL decision, and the order of magnitude of as far as possible getting kilo-ohm, so that the power of its loss is little.VH and VL can set up on their own according to the loaded work piece situation.When the voltage of SET1 pin (the 3rd pin) greater than 1.3V, SET2 pin (the 6th pin) less than 1.3V the time, OUT1 (the 1st pin) and OUT2 (the 7th pin) all export high level; When the voltage of SET1 pin greater than 1.3V, the SET2 pin greater than 1.3V the time, OUT1 exports high level, OUT2 output low level; When the voltage of SET1 pin less than 1.3V, the SET2 pin less than 1.3V the time, the OUT1 output low level, OUT2 exports high level; When the voltage of SET1 pin less than 1.3V, the SET2 pin greater than 1.3V the time, the equal output low level of OUT1 and OUT2, and this moment OUT1 and two input port P2.1, P2.2 of OUT2 and little processing and control element (PCE) link to each other.
The microprocessor control unit circuit that the utility model provides is formed (Fig. 6) by microprocessor controller and peripheral circuit.Wherein: microprocessor controller can adopt the MSP430F12X2 series monolithic, and the MSP430F12X2 series monolithic has peripheral module and convenient development scheme efficiently on extremely low power consumption, powerful disposal ability, the abundant sheet.What present embodiment mainly adopted is MSP430F1222 (U3) single-chip microcomputer, this model chip can be operated in the 1.8V-3.6V wide-voltage range, power consumption is very low, operating current only is 200 μ A during operation 2.2V/1MHz, and under park mode, electric current is low to moderate 0.1 μ A especially, so can adopt the lithium ion battery power supply; Chip integration has become to have 10-Bit, the 200-ksps A/D converter of internal reference source and sampling hold circuit, can be directly used in collection of simulant signal; Chip integration becomes 4KB+256B FLASH program storage and 256B data storage, is fit to C language compilation program.U5 is linear voltage regulator TPS79633, and its input voltage range is 2.7V-5.5V, and output voltage is 3.3V.Linear voltage regulator TPS79633 is a 3.3V voltage with voltage output end (VDC) voltage transitions of lithium battery LI-ION, thereby gives the power supply of MSP430F1222 (U3) single-chip microcomputer.
As shown in Figure 6, the 1st pin of chip U5 is connected to the voltage output end VDC of lithium battery LI-ION, the 1st pin is also by capacitor C 14 ground connection, the 2nd pin is connected to the 1st pin, and the 3rd pin is connected to MSP430F1222 (U3) single-chip microcomputer feeder ear VCC (the 2nd pin of U3), simultaneously, the 3rd pin is by resistance R 4, R5 ground connection, also by passing through capacitor C 16 ground connection, the 4th pin links to each other the 5th pin ground connection by capacitor C 15 to the 3rd pin with the 3rd pin.The 2nd pin of chip U3 is by capacitor C 12, C13 ground connection, and the 5th pin is connected to the end of crystal oscillator Y1, and the 6th pin is connected to the other end of Y1, and the two ends of Y1 are respectively by capacitor C 10, C11 ground connection, the 4th pin ground connection.MSP430F1222 (U3) single-chip microcomputer feeder ear VCC links to each other with the negative electrode of voltage stabilizing didoe D2, the anode of D2 links to each other with an end of switch S 1, the other end ground connection of S1, one end of resistance R 6 links to each other with the negative electrode of D2, the other end is by capacitor C 17 ground connection, one end of resistance R 11 links to each other with the anode of D2, and the other end is connected to MSP430F1222 (U3) single-chip microcomputer reset terminal RST (the 7th pin of U3).
The operating frequency of single-chip microcomputer is very big to the influence of power consumption, and frequency is high more, and power consumption is big more.The MSP430F12X2 series monolithic has three kinds of clock generating patterns, promptly external 8MHz crystal, external crystal and employing capacitance-resistance resonator.Take all factors into consideration the precision that reduces power consumption and guarantee timer, present embodiment adopts the external crystal of 32kHz, as the master clock of program running, also provides the clock source for timer simultaneously.This single-chip microcomputer adopts jtag interface to carry out program and downloads and on-line debugging, does not need purchasing procedure downloader and simulator, and development cost is very cheap.Because the reliable and stable and built in hardware house dog of chip performance, so reset circuit adopts rc reset circuit with low cost to get final product.
The course of work of the present utility model is: referring to Fig. 7, the piezoelectric self electric unit utilizes direct piezoelectric effect the mechanical energy of vibrating in the environment to be changed into the electric energy of interchange, this electric energy through energy produce with the rectification of harvester, filtering, voltage stabilizing, change in voltage after, become galvanic current and press.Before operate as normal, the first control switch closure, second control switch disconnects, the 3rd control switch closure, the 4th control switch disconnects, and super capacitor C1 and lithium ion battery all charge normal.At this moment, microprocessor voltage monitoring chip U6 monitors the supply power voltage VDD of super capacitor C1 and the supply power voltage VDC of lithium ion battery, and two output pins of U6 are connected with the P2.2 mouth with the P2.1 mouth of MSP430F1222 (U3).4 input control signal ports of 4 switches are connected with 8 I/O port P3.0, P3.1, P3.2, P3.3, P3.4, P3.5, P3.6, the P3.7 of single-chip microcomputer U3.When system enters operating state, first control switch disconnects, the second control switch closure, and the 3rd control switch closure, the 4th control switch disconnects, and system is by super capacitor C1 power supply, and lithium ion battery is in charged state.Single-chip microcomputer is gathered the dateout of U6 chip, when the voltage VDD that monitors super capacitor C1 two ends as microprocessor voltage monitoring chip U6 is lower than lower threshold VL, system transfers the first control switch switch closure to, second control switch disconnects, the 3rd control switch disconnects, the 4th control switch closure, system is powered by lithium ion battery, and super capacitor C1 is in charged state; The voltage VDC that monitors the lithium ion battery two ends as microprocessor voltage monitoring chip U6 is lower than lower threshold VL, single-chip microcomputer is controlled first control switch again and is disconnected, the second control switch closure, the 3rd control switch closure, the 4th control switch disconnects, C1 powers to wireless sensor network node by super capacitor, and lithium ion battery continues charging; This course of work circulates successively.In case the ICL7655 chip monitors the voltage VDC of the voltage VDD of super capacitor and lithium ion battery when being lower than lower threshold simultaneously, second control switch and the 4th control switch all disconnect, first control switch and the 3rd control switch are all closed, wireless sensor network node will quit work, and super capacitor C1 and lithium ion battery still continue charging.
Claims (9)
1. based on the wireless sensor network node power-supply management system of piezoelectric self electricity, it is characterized in that: this system comprises first control switch, main energy accumulating device, second control switch that links to each other successively, and the 3rd control switch, auxiliary energy storage device, the 4th control switch that link to each other successively, and power supply monitoring and management devices and wireless sensor network node; Energy takes place to link to each other with the auxiliary energy storage device with main energy accumulating device with the 3rd control switch by first control switch respectively with harvester, the output of second control switch and the 4th control switch all links to each other with wireless sensor network node, and power supply monitoring all links to each other with main energy accumulating device, auxiliary energy storage device, first control switch, second control switch, the 3rd control switch and the 4th control switch with management devices.
2. system according to claim 1, it is characterized in that: energy takes place to comprise piezoelectric ceramic generator unit, bridge rectifier, capacitor filter, voltage stabilizing didoe and DC-DC converting means with harvester, the output of piezoelectric ceramic generator unit obtains direct voltage through bridge rectifier, capacitor filter and voltage stabilizing didoe successively, and this direct voltage offers the voltage input end of DC-DC converting means.
3. system according to claim 2 is characterized in that: it is the rectifier diode of 1N60P or 1N5711 that described bridge rectifier adopts model.
4. system according to claim 2 is characterized in that: electric capacity adopts the tantalum electric capacity of AVX100 μ F/16V in the capacitor filter, and model is the D type.
5. system according to claim 1 is characterized in that: power supply monitoring and management devices are provided with the chip that the voltage of main energy accumulating device and auxiliary energy storage device is monitored in real time, and its model is ICL7665.
6. system according to claim 1 or 5, it is characterized in that: main energy accumulating device adopts super capacitor C1, and the voltage range of this electric capacity is 2.7V to 12.0V, and range of capacity is 0.1F to 1000F.
7. system according to claim 1 or 5, it is characterized in that: the auxiliary energy storage device adopts lithium ion battery.
8. system according to claim 1 is characterized in that: first control switch, second control switch, the 3rd control switch and the 4th control switch all adopt cmos switch.
9. system according to claim 1 is characterized in that: power supply monitoring and management devices comprise microprocessor control unit, and it adopts the single-chip microcomputer of MSP430F12X2.
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| CN103453998A (en) * | 2013-08-09 | 2013-12-18 | 国家电网公司 | Self-energy-taking wireless temperature sensor and achieving method thereof |
| CN103453998B (en) * | 2013-08-09 | 2016-08-10 | 国家电网公司 | A kind of self-energizing radio temperature sensor and its implementation |
| CN104300605A (en) * | 2014-10-08 | 2015-01-21 | 青岛歌尔声学科技有限公司 | Power circuit and control method thereof |
| CN104901385A (en) * | 2015-06-19 | 2015-09-09 | 北京纳米能源与系统研究所 | Generator energy management device and power generation system |
| CN107332461A (en) * | 2016-12-14 | 2017-11-07 | 北京理工大学 | The electric energy management system and its method of self-powered sensing micro-system based on vibrational energy acquisition technique |
| CN106989850A (en) * | 2017-04-21 | 2017-07-28 | 太原理工大学 | A kind of confession electric pressure sensor with high integration |
| CN106989850B (en) * | 2017-04-21 | 2019-07-16 | 太原理工大学 | A kind of confession electric pressure sensor with high integration |
| CN107612112A (en) * | 2017-09-28 | 2018-01-19 | 中国矿业大学 | Gas monitor wireless sensor network node under a kind of mine of vibrational energy capture |
| CN107612112B (en) * | 2017-09-28 | 2020-01-14 | 中国矿业大学 | Vibration energy-captured wireless sensor network node for monitoring gas in mine |
| CN108712107A (en) * | 2018-05-28 | 2018-10-26 | 深圳市浩博高科技有限公司 | A kind of circuit powered to microcontroller with transient electric-energy and method |
| CN112710410A (en) * | 2019-10-09 | 2021-04-27 | 北京迈驰电气技术有限公司 | Inductive energy storage type temperature sensor |
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