CN101841254A - Piezoelectric generation low-power consumption power-supply system and power supply method thereof - Google Patents
Piezoelectric generation low-power consumption power-supply system and power supply method thereof Download PDFInfo
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Abstract
本发明提供了一种压电发电低功耗电源系统，包括压电转换装置、整流电路、DC-DC电路、能量存储电路、控制器和应用电路，压电转换装置的输出端与整流电路的输入端连接，整流电路的输出端与DC-DC电路的输入端连接，DC-DC电路的输出端与能量存储电路的输入端连接，能量存储电路的输出端与应用电路连接；控制器设有第一输入端、第二输入端、第一输出端和第二输出端，第一输入端和第二输入端分别连接整流电路的输出端、能量存储电路的输出端，第一输出端、第二输出端分别连接DC-DC电路的输入端和应用电路。本发明还提供了上述系统的供电方法。本发明具有可持续稳定供应电力、发电效率高、系统功耗低、能量转换效率高等优点。
The present invention provides a low-power power supply system for piezoelectric power generation, which includes a piezoelectric conversion device, a rectifier circuit, a DC-DC circuit, an energy storage circuit, a controller and an application circuit, and the output terminal of the piezoelectric conversion device and the rectifier circuit The input terminal is connected, the output terminal of the rectifier circuit is connected with the input terminal of the DC-DC circuit, the output terminal of the DC-DC circuit is connected with the input terminal of the energy storage circuit, and the output terminal of the energy storage circuit is connected with the application circuit; the controller has The first input terminal, the second input terminal, the first output terminal and the second output terminal, the first input terminal and the second input terminal are respectively connected to the output terminal of the rectification circuit and the output terminal of the energy storage circuit, the first output terminal, the second output terminal The two output ends are respectively connected to the input end of the DC-DC circuit and the application circuit. The present invention also provides a power supply method for the above system. The invention has the advantages of sustainable and stable power supply, high power generation efficiency, low system power consumption, high energy conversion efficiency and the like.
Description
Technical field
The invention belongs to a kind of piezo-electric generating super low-power consumption power supply technique, more particularly, the present invention relates to a kind of piezoelectric generation low-power consumption power-supply system and method for supplying power to thereof, the composite piezoelectric oscillator that utilizes piezoelectric ceramic and elastomer to connect and compose is converted to electric energy with mechanical energy, by rectification circuit, DC-DC circuit, the energy storage circuit that the super low-power consumption element makes up, realize the power-supply system and the method for supplying power to of supply of electric power.
Background technology
At present, in many equipment, generally use battery as power supply, this has brought many facilities for people's life, but also has some problems simultaneously.At first, traditional battery volume is big, and useful life is short; Secondly, when battery electric quantity is not enough, changes battery and allow many systems cut off the power supply temporarily.And battery contains heavy metal, pollutes if the improper meeting of old and useless battery treatment causes serious environmental.Vehicle ', machine run, people's walking etc. has a large amount of vibrational energies not to be used in system, causes the waste of resource.In existing wireless sensor network is used, generally also exist the power consumption of system all big, problem such as supply of electric power instability.Therefore, collect vibrational energy and be electric energy, use the super low-power consumption technology its effective conversion, and and then replace the common batteries that present wireless sensor network etc. generally uses, to realize the system low-power consumption self-powered, be very necessary.
Summary of the invention
The objective of the invention is to overcome the shortcoming of prior art with not enough, provide a kind of and mechanical energy can be converted into electric energy, and by real-time monitoring voltage, carry out voltage-regulation, energy storage, super low-power consumption conversion, make the piezoelectric generation low-power consumption power-supply system that supply of electric power is continual and steady.
Another object of the present invention is to provide a kind of method of supplying power to of realizing said system.
Purpose of the present invention is achieved through the following technical solutions:
A kind of piezoelectric generation low-power consumption power-supply system, comprise piezoelectric transducer device, rectification circuit, DC-DC circuit, energy storage circuit, controller and application circuit, the output of described piezoelectric transducer device is connected with the input of rectification circuit, the output of described rectification circuit is connected with the input of DC-DC circuit, the output of described DC-DC circuit is connected with the input of energy storage circuit, and the output of described energy storage circuit is connected with application circuit; Described controller is provided with first input end, second input, first output and second output, its first input end is connected the output of rectification circuit, the output of energy storage circuit respectively with second input, and its first output, second output connect the input and the application circuit of DC-DC circuit respectively.
Described piezoelectric transducer device is the composite piezoelectric oscillator that piezoelectric ceramic and elastomer connect and compose, described composite piezoelectric oscillator is rectangle, circle or cymbals lid shape structure, the composite piezoelectric oscillator is provided with the two poles of the earth output line, and the two poles of the earth output line is connected with the input of rectification circuit.
Described rectification circuit comprises bridge rectifier, voltage stabilizing didoe, filter capacitor and the elementary storage capacitance that is made of four diodes, and described bridge rectifier, voltage stabilizing didoe, filter capacitor and elementary storage capacitance are connected in parallel successively; Described bridge rectifier is provided with the two poles of the earth incoming line, and the two poles of the earth incoming line of bridge rectifier is connected with the two poles of the earth output line of piezoelectric transducer device; The two ends of described elementary storage capacitance are connected with the input of DC-DC circuit respectively, and are connected with the first input end of controller.
Described filter capacitor and elementary storage capacitance are electrochemical capacitor, and the capacitance of described filter capacitor is less than the capacitance of elementary storage capacitance; Also be connected with resistance between the first input end of controller and the two ends of elementary storage capacitance respectively.
Described DC-DC circuit comprises integrated chip, fly-wheel diode and output filter; Described integrated chip comprises first input end, second input, the 3rd input and output, and its first input end and second input are connected the output of rectification circuit respectively, and its 3rd input connects first output of controller; The two ends of described fly-wheel diode are connected with second input with the output of integrated chip respectively; And the two ends of fly-wheel diode connect the input of output filter simultaneously; The output of described output filter is connected with the input of energy storage circuit.
Described output filter is made of inductance and capacitances in series, and described fly-wheel diode one end connects inductance, and the other end connects electric capacity; The two ends of electric capacity are the output of output filter, and all connect the input of energy storage circuit.
Described energy storage circuit comprises energy storage medium, voltage regulator and resitstance voltage divider, and the two ends of described energy storage medium are connected with the output of DC-DC circuit, and is connected with second input of controller; The input of described voltage regulator is connected with the positive pole of energy storage medium, and its output is connected with application circuit with second output of controller respectively; Resitstance voltage divider and voltage regulator are connected in parallel.
Described resitstance voltage divider is made of the resistance of two series connection, and one of them resistance also is connected on the input of voltage regulator, another resistance wherein one terminate on the input of voltage regulator other end ground connection.
Described energy storage medium is a rechargeable battery, or is the parallel circuits that rechargeable battery and electric capacity constitute, and the diode that also to be connected a pressure drop between rechargeable battery and the electricity be 0.3V, to prevent electric current backflow; Also be connected with resistance between second input of the two ends of rechargeable battery and controller.
The method of supplying power to of said system specifically comprises the steps:
(1) piezoelectric transducer device input stimulus produces alternating voltage by piezoelectric effect, and alternating voltage passes to rectification circuit through the two poles of the earth output line;
(2) in the rectification circuit, bridge rectifier is converted to direct voltage with alternating voltage, and voltage stabilizing didoe at certain value, carries out the dc voltage stability that converts filtering by filter capacitor, and is stored in the elementary storage capacitance;
(3) controller is monitored the voltage of elementary storage capacitance, if the voltage of elementary storage capacitance reaches more than the 4.5V, controller outputs control signals to the DC-DC circuit, open the DC-DC circuit, and export continual and steady direct voltage, this electric energy is input in the energy storage circuit, and by energy storage circuit after voltage regulator is regulated, power supply uses for controller and application circuit; If when the voltage of elementary storage capacitance was low to moderate 3V, controller sent a control signal to the DC-DC circuit by first output, closes DC-DC circuit and energy storage circuit, application circuit is powered by controller;
(4) controller is monitored the voltage of energy storage circuit, if the voltage in the energy storage circuit is lower than 3v, then controller sends signal, closes DC-DC circuit and energy storage circuit, and application circuit is powered by controller; If the voltage in the energy storage circuit is higher than 4.5v, then controller sends signal, closes DC-DC circuit and energy storage circuit, is powered to application circuit by energy storage circuit and uses.
The present invention compared with prior art has following advantage and beneficial effect:
1, system of the present invention utilizes the piezoelectric effect of piezoelectric ceramic that mechanical energy is converted into electric energy, and by piezoelectric generating device, reclaiming vibrational energy is the micropower power electronic equipment, has advantages such as generating efficiency height, energy-saving and environmental protection.
2, system of the present invention can realize the power supply of super low-power consumption, promptly by controller the voltage of energy storage circuit is monitored, and when energy storage circuit had enough electric energy, controller and application circuit were opened, and are powered to application circuit by energy storage circuit; And when the energy storage circuit energy shortage, close DC-DC circuit, controller and application circuit, application circuit is powered by controller, makes system enter low-power consumption mode, to reduce system power dissipation.
3, system of the present invention can realize continual and steady self-powered, promptly by voltage regulator the output voltage of energy storage medium is adjusted to 3v, is the whole system power supply.When the electric weight of energy storage circuit is low, the Adjustment System method of work (as system's open frequency etc.), entering low-power consumption mode (promptly powering to application circuit) by controller, the system that can guarantee works continually and steadily.
4, the integrated chip in all electric elements of system of the present invention such as voltage regulator, controller, the DC-DC circuit etc. all adopts the super low-power consumption type, to reduce system power dissipation.
5, method of the present invention is an electricity collection with the Conversion of energy of vibration, and whole system does not need external power supply can realize self-powered, has low in energy consumption, energy conversion efficiency advantages of higher.
Description of drawings
Fig. 1 is a general structure schematic diagram of the present invention.
Fig. 2 is a concrete structure schematic diagram shown in Figure 1.
Fig. 3 is the structural representation of rectification circuit shown in Figure 2.
Fig. 4 is the structural representation of DC-DC circuit shown in Figure 2.
Fig. 5 is the structural representation of controller shown in Figure 2.
Fig. 6 is the structural representation of energy storage circuit shown in Figure 2.
Embodiment
The present invention is described in further detail below in conjunction with embodiment and accompanying drawing, but embodiments of the present invention are not limited thereto.
Embodiment
Fig. 1～6 show the concrete structure figure of present embodiment, as shown in Figure 1, this piezoelectric generation low-power consumption power-supply system, comprise piezoelectric transducer device, rectification circuit, the DC-DC circuit, energy storage circuit, controller and application circuit, shown in Fig. 2～6, the output of described piezoelectric transducer device and the input of rectification circuit 1,2 connect, the output 3 of described rectification circuit, 4 with the input 5 of DC-DC circuit, 6 connect, the output 7 of described DC-DC circuit, 8 with the input 15 of energy storage circuit, 16 connect, and the output 17 of described energy storage circuit is connected with application circuit; As shown in Figure 5, described controller is provided with first input end 9,10, second input 11, first output 12 and second output 13, its first input end 9,10 is connected the output 3,4 of rectification circuit, the output 17 of energy storage circuit respectively with second input 11, and its first output 12, second output 13 connect the input 5,6 and the application circuit of DC-DC circuit respectively.
Described piezoelectric transducer device is the composite piezoelectric oscillator that piezoelectric ceramic and elastomer connect and compose, described composite piezoelectric oscillator is rectangle, circle or cymbals lid shape structure, the composite piezoelectric oscillator is provided with the two poles of the earth output line, and the two poles of the earth output line is connected with the input 1,2 of rectification circuit.
As shown in Figure 3, described rectification circuit comprises bridge rectifier, voltage stabilizing didoe D1, filter capacitor C1 and the elementary storage capacitance C2 that is made of four diodes, and described bridge rectifier, voltage stabilizing didoe D1, filter capacitor C1 and elementary storage capacitance C2 are connected in parallel successively; Described bridge rectifier is provided with the two poles of the earth incoming line 1,2, and the two poles of the earth incoming line 1,2 of bridge rectifier is connected with the two poles of the earth output line of piezoelectric transducer device; The two ends 3,4 of described elementary storage capacitance C2 are connected with the input 5,6 of DC-DC circuit respectively, and are connected with the first input end 9,10 of controller.
Described filter capacitor C1 and elementary storage capacitance C2 are electrochemical capacitor, and the capacitance of described filter capacitor C1 is less than the capacitance of elementary storage capacitance C2; Also be connected with resistance R 5, R6 respectively between the first input end 9,10 of controller and the two ends 3,4 of elementary storage capacitance C2.
As shown in Figure 4, described DC-DC circuit comprises integrated chip, sustained diode 2 and output filter; Described integrated chip comprises first input end 5, second input 6, the 3rd input 18 and output, and its first input end 5 and second input 6 are connected the output 3,4 of rectification circuit respectively, and its 3rd input 18 connects first output 12 of controllers; The two ends of described sustained diode 2 are connected with second input 6 with the output of integrated chip respectively; And the two ends of sustained diode 2 connect the input of output filter simultaneously; The output 7,8 of described output filter is connected with the input 15,16 of energy storage circuit.
Described output filter is connected with capacitor C 3 by inductance L 2 and is constituted, and described sustained diode 2 one ends connect inductance L 2, and the other end connects capacitor C 3; The two ends of capacitor C 3 are the output 7,8 of output filter, and all connect the input 15,16 of energy storage circuit.
As shown in Figure 6, described energy storage circuit comprises energy storage medium, voltage regulator and resitstance voltage divider, and the two ends 15,16 of described energy storage medium are connected with the output 7,8 of DC-DC circuit, and is connected with second input 11 of controller; The input of described voltage regulator is connected with the positive pole of energy storage medium, and its output 17 is connected with application circuit with second output 13 of controller respectively; Resitstance voltage divider and voltage regulator are connected in parallel.
Resitstance voltage divider is made of the resistance of two series connection, and one of them resistance R 2 also is connected on the input of voltage regulator, another resistance R 1 wherein one terminate on the input of voltage regulator other end ground connection.
Described energy storage medium is the parallel circuits that rechargeable battery and capacitor C 4 constitutes, and the diode D3 that also to be connected a pressure drop between rechargeable battery and the capacitor C 4 be 0.3V, to prevent electric current backflow; Also be connected with resistance R 3, R4 between second input 11 of the two ends of rechargeable battery and controller.
The method of supplying power to of said system specifically comprises the steps:
(1) piezoelectric transducer device input stimulus produces alternating voltage by piezoelectric effect, and alternating voltage passes to rectification circuit through the two poles of the earth output line;
(2) in the rectification circuit, bridge rectifier is converted to direct voltage with alternating voltage, and voltage stabilizing didoe at certain value, carries out the dc voltage stability that converts filtering by filter capacitor, and is stored in the elementary storage capacitance;
(3) controller is monitored the voltage of elementary storage capacitance, if the voltage of elementary storage capacitance reaches more than the 4.5V, controller outputs control signals to the DC-DC circuit, open the DC-DC circuit, and export continual and steady direct voltage, this electric energy is input in the energy storage circuit, and by energy storage circuit after voltage regulator is regulated, power supply uses for controller and application circuit; If when the voltage of elementary storage capacitance was low to moderate 3V, controller sent a control signal to the DC-DC circuit by first output, closes DC-DC circuit and energy storage circuit, application circuit is powered by controller;
(4) controller is monitored the voltage of energy storage circuit, if the voltage in the energy storage circuit is lower than 3v, then controller sends signal, closes DC-DC circuit and energy storage circuit, and application circuit is powered by controller; If the voltage in the energy storage circuit is higher than 4.5v, then controller sends signal, closes DC-DC circuit and energy storage circuit, is powered to application circuit by energy storage circuit and uses.
Embodiment 2
Present embodiment except that following characteristics other structures with embodiment 1: described energy storage medium only is a rechargeable battery.
The various embodiments described above are preferred implementation of the present invention; but embodiments of the present invention are not restricted to the described embodiments; other any do not deviate from change, the modification done under spirit of the present invention and the principle, substitutes, combination, simplify; all should be the substitute mode of equivalence, be included within protection scope of the present invention.
Claims (10)
1. piezoelectric generation low-power consumption power-supply system, it is characterized in that: comprise piezoelectric transducer device, rectification circuit, DC-DC circuit, energy storage circuit, controller and application circuit, the output of described piezoelectric transducer device is connected with the input of rectification circuit, the output of described rectification circuit is connected with the input of DC-DC circuit, the output of described DC-DC circuit is connected with the input of energy storage circuit, and the output of described energy storage circuit is connected with application circuit; Described controller is provided with first input end, second input, first output and second output, its first input end is connected the output of rectification circuit, the output of energy storage circuit respectively with second input, and its first output, second output connect the input and the application circuit of DC-DC circuit respectively.
2. piezoelectric generation low-power consumption power-supply system according to claim 1, it is characterized in that: described piezoelectric transducer device is the composite piezoelectric oscillator that piezoelectric ceramic and elastomer connect and compose, described composite piezoelectric oscillator is rectangle, circle or cymbals lid shape structure, the composite piezoelectric oscillator is provided with the two poles of the earth output line, and the two poles of the earth output line is connected with the input of rectification circuit.
3. piezoelectric generation low-power consumption power-supply system according to claim 2 is characterized in that:
Described rectification circuit comprises bridge rectifier, voltage stabilizing didoe, filter capacitor and the elementary storage capacitance that is made of four diodes, and described bridge rectifier, voltage stabilizing didoe, filter capacitor and elementary storage capacitance are connected in parallel successively; Described bridge rectifier is provided with the two poles of the earth incoming line, and the two poles of the earth incoming line of bridge rectifier is connected with the two poles of the earth output line of piezoelectric transducer device; The two ends of described elementary storage capacitance are connected with the input of DC-DC circuit respectively, and are connected with the first input end of controller.
4. piezoelectric generation low-power consumption power-supply system according to claim 3 is characterized in that: described filter capacitor and elementary storage capacitance are electrochemical capacitor, and the capacitance of described filter capacitor is less than the capacitance of elementary storage capacitance; Also be connected with resistance between the first input end of controller and the two ends of elementary storage capacitance respectively.
5. piezoelectric generation low-power consumption power-supply system according to claim 1 is characterized in that: described DC-DC circuit comprises integrated chip, fly-wheel diode and output filter; Described integrated chip comprises first input end, second input, the 3rd input and output, and its first input end and second input are connected the output of rectification circuit respectively, and its 3rd input connects first output of controller; The two ends of described fly-wheel diode are connected with second input with the output of integrated chip respectively; And the two ends of fly-wheel diode connect the input of output filter simultaneously; The output of described output filter is connected with the input of energy storage circuit.
6. piezoelectric generation low-power consumption power-supply system according to claim 5 is characterized in that: described output filter is made of inductance and capacitances in series, and described fly-wheel diode one end connects inductance, and the other end connects electric capacity; The two ends of electric capacity are the output of output filter, and all connect the input of energy storage circuit.
7. piezoelectric generation low-power consumption power-supply system according to claim 1, it is characterized in that: described energy storage circuit comprises energy storage medium, voltage regulator and resitstance voltage divider, the two ends of described energy storage medium are connected with the output of DC-DC circuit, and are connected with second input of controller; The input of described voltage regulator is connected with the positive pole of energy storage medium, and its output is connected with application circuit with second output of controller respectively; Resitstance voltage divider and voltage regulator are connected in parallel.
8. piezoelectric generation low-power consumption power-supply system according to claim 7, it is characterized in that: described resitstance voltage divider is made of the resistance of two series connection, one of them resistance also is connected on the input of voltage regulator, another resistance wherein one terminate on the input of voltage regulator other end ground connection.
9. piezoelectric generation low-power consumption power-supply system according to claim 7, it is characterized in that: described energy storage medium is a rechargeable battery, or be the parallel circuits that rechargeable battery and electric capacity constitute, and the diode that also to be connected a pressure drop between rechargeable battery and the electricity be 0.3V is to prevent electric current backflow; Also be connected with resistance between second input of the two ends of rechargeable battery and controller.
10. the method for supplying power to of each described system of claim 1～9 is characterized in that specifically comprising the steps:
(1) piezoelectric transducer device input stimulus produces alternating voltage by piezoelectric effect, and alternating voltage passes to rectification circuit through the two poles of the earth output line;
(2) in the rectification circuit, bridge rectifier is converted to direct voltage with alternating voltage, and voltage stabilizing didoe at certain value, carries out the dc voltage stability that converts filtering by filter capacitor, and is stored in the elementary storage capacitance;
(3) controller is monitored the voltage of elementary storage capacitance, if the voltage of elementary storage capacitance reaches more than the 4.5V, controller outputs control signals to the DC-DC circuit, open the DC-DC circuit, and export continual and steady direct voltage, this electric energy is input in the energy storage circuit, and by energy storage circuit after voltage regulator is regulated, power supply uses for controller and application circuit; If when the voltage of elementary storage capacitance was low to moderate 3V, controller sent a control signal to the DC-DC circuit by first output, closes DC-DC circuit and energy storage circuit, application circuit is powered by controller;
(4) controller is monitored the voltage of energy storage circuit, if the voltage in the energy storage circuit is lower than 3v, then controller sends signal, closes DC-DC circuit and energy storage circuit, and application circuit is powered by controller; If the voltage in the energy storage circuit is higher than 4.5v, then controller sends signal, closes DC-DC circuit and energy storage circuit, is powered to application circuit by energy storage circuit and uses.
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