CN102497134B - Group walking energy collection system - Google Patents
Group walking energy collection system Download PDFInfo
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- CN102497134B CN102497134B CN201110443698.0A CN201110443698A CN102497134B CN 102497134 B CN102497134 B CN 102497134B CN 201110443698 A CN201110443698 A CN 201110443698A CN 102497134 B CN102497134 B CN 102497134B
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Abstract
The invention discloses a group walking energy collection system comprising a piezoelectric generating set and an electric energy collecting device that is connected with the piezoelectric generating set. The piezoelectric generating set includes: a bearing block, which is used for receiving walking pressures; a force amplification assembly, which is used for amplifying the waking pressures; a pedestal; and a piezoelectric assembly, which is used for converting mechanical energy into electric energy. And the electric energy collecting device consists of a rectification circuit, an energy storage capacitor, a control circuit and a voltage stabilizing circuit, wherein the rectification circuit, the energy storage capacitor, the control circuit and the voltage stabilizing circuit are successively in cascade connection. According to the invention, the piezoelectric assembly and the force amplification assembly of the stacked piezoelectric ceramics are utilized to enable generating capacity to be increased by over ten times or even more than hundred times; and the mechanical energy can be converted into electric energy that can be collected and utilized easily; therefore, electric energy that is caused by walking of crowds of people as well as is cluttered and can not be directly used is processed by a circuit and then is stored or is directly used for supplying power for a follow-up circuit. The provided system, which is suitable for low frequency excitation of walking and has long service life, can be applied to large population flows at public places like a subway and the like to collect lost of electric energy.
Description
Technical field
The present invention relates to energy collecting system, particularly relate to a kind of group walking energy collection system.
Background technology
Along with petering out of traditional energy, people are to new, continuable, the clean increasing concern of energy input.Clean energy resource comprises Hydrogen Energy, nuclear energy and regenerative resource etc.Regenerative resource refers to the energy that raw material can regenerate, as wind-power electricity generation, solar energy, biological energy source, ocean tidal power etc., there is not the possibility of power consumption in regenerative resource, is therefore day by day subject to the attention of many countries, and thus collection of energy just becomes a kind of method tapped a new source of energy widely.At present, collection of energy is mainly based on the Collection utilization of the natural energy such as solar energy, wind energy, but the natural energy such as solar energy, wind energy can be subject to the restriction of natural conditions, stably can not provide energy.We have the energy that can develop of many long-term stabilities at one's side, as the walking walking energy of people really for it.Consider the big city as Shanghai, Beijing etc., the stream of people of every day is very intensive, and track traffic stands in the breach especially, closely has the volume of the flow of passengers of 6,000,000 person-times every day, if what these stream of peoples produced tramples energy Collection utilization, its generated energy will be very considerable.
Collection of energy when walking to people, sums up and gets up to mainly contain electromagnetic driven generating and piezoelectric material to generate electricity two kinds of methods.Electromagnetic driven generating generally adopts machine driving, hydraulic pressure and these three kinds of methods pneumatic to drive the running of Electromagnetic generation mechanism.Such as: gear drive is set at sole, kinetic energy downward for vola is converted to rotating energy, then drives electromagnetic generator to produce electric energy; Manufacture two hydraulic cavities at sole and shoes tip, arrange turbine at hydraulic cavities connecting place, when people walks, liquid flow drives turbine to rotarily drive generator; In shoes inside, the stator of closed-loop path as gas driven generator that has applicable compressed-air actuated entrance and exit is set, rotor be one can freely-movable, constraint in mechanical, there is the moving mass of magnetic Field Coupling, adopt pneumatic method generating.But, the method of machine driving generating have employed more transmission link, the method of hydraulic electricity generation, Pneumatic electric generating has again leakage problem, complex structure, cost high, and due to vola motion frequent and random, electromagnetic driven generating method reliability lower.
Propose a kind of TRT of piezo-stack type in " the modeling and simulation analysis of piezo-stack type TRT " that Zhejiang Prov Industrial And Commercial University delivers in October, 2009, although its utilization stacks piezoelectric ceramics carry out increasing electricity output, overall generated energy is still less.
Therefore, those skilled in the art is devoted to develop a kind of group walking energy collection system, and generated energy is increased decades of times even hundreds of times by this system, can be used in the electricity collection of flow of the people huge in public place.
Summary of the invention
Because the above-mentioned defect of prior art, technical problem to be solved by this invention is to provide a kind of group walking energy collection system, utilize the piezoelectric element that stacks piezoelectric ceramics and expand power assembly and generated energy is increased decades of times even hundreds of times, be suitable for the low-frequency excitation of walking, and the more permanent life-span can be had.
For achieving the above object, the invention provides a kind of group walking energy collection system, the power collecting device comprising piezoelectric generating device and be attached thereto, it is characterized in that: described piezoelectric generating device comprises the force-bearing piece accepting walking pressure, amplify the expansion power assembly of described walking pressure, mechanical energy is converted to piezoelectric element and the base of electric energy, described expansion power assembly comprises pulling shaft, sleeve and pressure axis, described piezoelectric element is arranged at the inside of described sleeve, described pressure axis is through described sleeve and described piezoelectric element, described pressure axis is connected with described force-bearing piece, described power collecting device comprises the rectification circuit of cascade successively, storage capacitor, control circuit and mu balanced circuit.
Further, the load end of described pressure axis in the outside of described sleeve, and is fixed on described force-bearing piece, and described pressure axis has pressed end, and described pressed end is positioned at described sleeve inner.
Further, the stationary plane of described piezoelectric element and the inner bottom surface of described sleeve are fitted.
Further, the compression face of described piezoelectric element contacts with described pressed end.
Further, one end of described pulling shaft is threaded connection parts and is fixed on described sleeve, and the other end of described pulling shaft is fixed on described base.
Further, described piezoelectric element comprises and going between with a negative electrical charge with multiple piezoelectric ceramic pieces of laminated construction distribution, multiple electrode slice, positive charge lead-in wire; Each electrode slice be placed in two adjacent and between the piezoelectric ceramic piece that polarised direction is contrary; Electrode slice with positive charge is parallel with one another and go between with described positive charge and be connected, and the electrode slice with negative electrical charge is parallel with one another and go between with described negative electrical charge and be connected; Described positive charge lead-in wire is connected with the described rectification circuit of described power collecting device with described negative electrical charge lead-in wire.
Further, described rectification circuit is full bridge rectifier.
Further, described control circuit is formed by connecting by BJT on-off circuit and MOSFET pipe.
Further, wherein said mu balanced circuit comprises the MAX666 chip for exporting 5V or fixed voltage.
In better embodiment of the present invention, at afterburner process, walking pressure acts on force-bearing piece by pedal, force-bearing piece produces the trend moved downward, by being fixed thereon the load end of pressure axis, force the pressure axis of the left and right sides to bend, and make the pressed end of pressure axis to the trend of direction, the bottom surface generation transverse movement of sleeve.Now walking pressure resolves into the pulling force on the pressure axis of left and right, and this pulling force can reach the decades of times even hundreds of times of walking pressure.Because sleeve is in stationary state, fit in the stationary plane of the piezoelectric element of sleeve inner and the bottom surface of described sleeve, therefore pressed end is by the compression face of the piezoelectric element by being in contact with it extruding piezoelectric element, described pulling force is converted to the pressure acted on piezoelectric element, there is deformation and produce electric charge in the piezoelectric ceramic piece of piezoelectric element under the effect of this pressure.Removing power process, pulling shaft in tension in afterburner process recovers deformation, makes pressure axis and force-bearing piece homing, and when the pressure that piezoelectric ceramic piece is subject to reduces, the electric charge that piezoelectric ceramic piece produces reduces thereupon.The electric charge that electrode slice between piezoelectric ceramic piece is collected afterburner process and removed on the piezoelectric ceramic piece surface of power process, and be sent to power collecting device.This electric current is DC current by the full bridge rectifier rectification of power collecting device, charges to storage capacitor.The control circuit of power collecting device controls the charge and discharge process of storage capacitor, and the mu balanced circuit of power collecting device the electric energy that storage capacitor is released is converted to constant 5V or other constant voltage exports, to be filled with rechargeable battery or follow-up circuit.
Group walking energy collection system of the present invention utilizes the piezoelectric element that stacks piezoelectric ceramics and expands power assembly and generated energy increased decades of times even hundreds of times, by the electric energy that mechanical energy is easier Collection and use, the electric energy that is mixed and disorderly, that not directly use that piezoelectric element produces by power collecting device of the present invention stores or is directly subsequent conditioning circuit energy supply after the process of oversampling circuit.The present invention is suitable for the low-frequency excitation of walking, and can have the more permanent life-span, for flow of the people huge in the public places such as subway, can collect a large amount of electric energy.
Be described further below with reference to the technique effect of accompanying drawing to design of the present invention, concrete structure and generation, to understand object of the present invention, characteristic sum effect fully.
Accompanying drawing explanation
Fig. 1 is the structural representation of the piezoelectric generating device of the group walking energy collection system of a preferred embodiment of the present invention.Need be appreciated that the piezoelectric generating device of the group walking energy collection system of the present invention shown in figure is symmetrical structure, the mark therefore for a side structure in figure is also applicable to the structure of its antimere with describing.
Fig. 2 is the structural representation of the piezoelectric element 5 of the piezoelectric generating device of the group walking energy collection system of a preferred embodiment of the present invention.
Fig. 3 is the circuit diagram of the power collecting device of the group walking energy collection system of a preferred embodiment of the present invention.
Detailed description of the invention
As shown in Figure 1, the piezoelectric generating device of group walking energy collection system of the present invention is symmetrical structure, comprise force-bearing piece 1, base 4 and symmetrical distribution two expand power assemblies and two piezoelectric elements 5, wherein expand power assembly and comprise pulling shaft 21, sleeve 22 and pressure axis 23.Pressure axis 23 is through sleeve 22, and the load end 231 of pressure axis 23 outside sleeve 22, and is fixed on force-bearing piece 1.Pressure axis 23 has pressed end 232.One end 211 of pulling shaft 21 is threaded connection parts 213 and is fixed on sleeve 22, and the other end 212 of pulling shaft 21 is fixed on base 4.It is inner that piezoelectric element 5 is arranged at sleeve 22, and the stationary plane 55 of piezoelectric element 5 is fitted with the bottom surface 221 of sleeve 22.Pressed end 232 contacts with the compression face 56 of piezoelectric element 5.
In use, when people tramples the piezoelectric generating device of group walking energy collection system of the present invention, generation is afterburning and remove power two processes.In afterburner process, walking pressure acts on force-bearing piece 1 by pedal (not shown), force-bearing piece 1 produces the trend moved downward, by being fixed thereon the load end 231 of pressure axis 23, force the pressure axis 23 of the left and right sides to bend, and make the pressed end 232 of pressure axis 23 to the trend of direction, the bottom surface 221 generation transverse movement of sleeve 22.Now walking pressure resolves into the pulling force on left and right pressure axis 23, and this pulling force can reach the decades of times even hundreds of times of walking pressure.Because sleeve 22 is in stationary state, the stationary plane 55 of the piezoelectric element 5 of sleeve inner is fitted with the bottom surface 221 of described sleeve 22, therefore the compression face 56 of the piezoelectric element 5 by being in contact with it is extruded piezoelectric element 5 by pressed end 232, described pulling force being converted to the pressure acted on piezoelectric element 5, there is deformation and produces electric charge in piezoelectric element 5.Removing in power process, walking pressure is removed from force-bearing piece 1, and pulling shaft 21 in tension in afterburner process recovers deformation, makes pressure axis 23 and force-bearing piece 1 homing.When the pressure that piezoelectric element 5 is subject to reduces, the electric charge that piezoelectric element 5 produces reduces thereupon.
The electric charge that piezoelectric element 5 produces will be collected by electrode slice, and as shown in Figure 2, the piezoelectric element 5 of walking energy collection system of the present invention comprises multiple piezoelectric ceramic piece 51, multiple electrode slice 52, positive charge lead-in wire 53 and negative electrical charge lead-in wire 54.Piezoelectric ceramic piece 51 is with laminated construction distribution, and adjacent two panels piezoelectric ceramic piece 51 has contrary polarised direction.Electrode slice 52 is arranged between every two adjacent piezoelectric ceramic pieces 51.Owing to there is deformation or remove in the process of pressure recover deformation being under pressure, what the face that two of piezoelectric ceramic piece 51 are relative produced is the electric charge that polarity is contrary mutually, therefore in the piezoelectric element 5 of Fig. 2 display, what two electrode surfaces up and down of each electrode slice 52 were collected is like charges, but the charge polarity that adjacent two electrode slices 52 are collected is contrary mutually, therefore need the electrode slice 52 of the electric charge collecting opposed polarity to draw respectively.Namely be under pressure in the process of generation deformation at piezoelectric element, electrode slice with positive charge is parallel with one another and go between with positive charge and 53 to be connected, electrode slice with negative electrical charge is parallel with one another and go between with negative electrical charge and 54 to be connected, thus positive charge lead-in wire 53 on collect be positive charge, negative electrical charge lead-in wire 54 on collect be negative electrical charge.When piezoelectric element is subject to negative pressure, what positive charge lead-in wire 53 was collected is negative electrical charge, and what negative electrical charge lead-in wire 54 was collected is positive charge.
The electric charge collected is sent to the power collecting device of walking energy collection system of the present invention, and as shown in Figure 3, the power collecting device of walking energy collection system of the present invention comprises the rectification circuit, storage capacitor C, control circuit and the mu balanced circuit that connect successively.Piezoelectric element 5 is expressed as current source in the drawings, and positive charge lead-in wire 53 and negative electrical charge lead-in wire 54 are connected to the rectification circuit of power collecting device.The circuit that the rectification circuit of power collecting device of the present invention can simplify between power collecting device and piezoelectric generating device connects, namely the positive charge lead-in wire 53 of piezoelectric element 5 and negative electrical charge go between 54 and need to be connected on respectively two inputs of rectification circuit, no matter positive and negative, can obtain determining that the DC current of current direction charges to storage capacitor C at two inputs of rectification circuit.The rectification circuit adopted in the present embodiment is full bridge rectifier BRIDGE.
The control circuit of power collecting device is for controlling the charge and discharge process of storage capacitor C.Control circuit comprises BJT on-off circuit and MOSFET pipe Q2 in the present embodiment, and the BJT on-off circuit wherein used is made up of in mode as shown in Figure 3 triode Q1, resistance R3, Zener diode D2, resistance RI, resistance R7 and resistance R2.The source electrode of MOSFET pipe Q2 is connected with the Zener diode D2 of BJT on-off circuit and the colelctor electrode of triode Q1 respectively with grid, the grounded drain of MOSFET pipe Q2.Like this, when the voltage at storage capacitor C two ends does not reach preset voltage value, control circuit is in high impedance status, storage capacitor C continues charging, when the voltage at storage capacitor C two ends exceedes preset voltage value, the MOSFET pipe Q2 of control circuit, by conducting, makes storage capacitor C discharge.
The mu balanced circuit of power collecting device is used for that the electric energy that storage capacitor C releases is converted to constant voltage and exports.Mu balanced circuit is by chip MAX666 in the present embodiment, electric capacity C2, electric capacity C4, resistance R5 and resistance R6 is formed, wherein one end of storage capacitor C directly connects the pin VIN (POS) of the chip MAX666 for exporting 5V or fixed voltage, this end is connected with the pin LBI of chip MAX666 through resistance R5, the pin LBI of chip MAX666 is through resistance R6 ground connection, the pin LBO of chip MAX666 is connected on the triode Q1 emitter stage of BJT on-off circuit through the resistance R7 of electric capacity C2 and BJT on-off circuit, the pin VOUT of chip MAX666 is through electric capacity C4 ground connection, the pin SENSE of chip MAX666, pin SHON and pin VSET earth, the pin GND ground connection of chip MAX666.After control circuit makes storage capacitor C discharge, mu balanced circuit the electric energy that storage capacitor C releases is converted to constant 5V or other constant voltage exports, to be filled with rechargeable battery or follow-up circuit.
More than describe preferred embodiment of the present invention in detail.Should be appreciated that those of ordinary skill in the art just design according to the present invention can make many modifications and variations without the need to creative work.Therefore, all those skilled in the art, all should by the determined protection domain of claims under this invention's idea on the basis of existing technology by the available technical scheme of logical analysis, reasoning, or a limited experiment.
Claims (5)
1. a group walking energy collection system, the power collecting device comprising piezoelectric generating device and be attached thereto, it is characterized in that: described piezoelectric generating device comprises the force-bearing piece accepting walking pressure, the expansion power assembly amplifying described walking pressure, piezoelectric element mechanical energy being converted to electric energy and base, described expansion power assembly comprises pulling shaft, sleeve and pressure axis, described piezoelectric element is arranged at the inside of described sleeve, described pressure axis is through described sleeve and described piezoelectric element, and described pressure axis is connected with described force-bearing piece; Described power collecting device comprises the rectification circuit of cascade successively, storage capacitor, control circuit and mu balanced circuit;
The load end of described pressure axis is in the outside of described sleeve, and be fixed on described force-bearing piece, described pressure axis has pressed end, described pressed end is positioned at described sleeve inner, and in afterburner process, walking pressure acts on force-bearing piece by pedal, force-bearing piece produces the trend moved downward, by being fixed thereon the load end of pressure axis, force the pressure axis of the left and right sides to bend, and make the pressed end of pressure axis to the trend of direction, the bottom surface generation transverse movement of sleeve;
The stationary plane of described piezoelectric element and the inner bottom surface of described sleeve are fitted;
The compression face of described piezoelectric element contacts with described pressed end;
One end of described pulling shaft is threaded connection parts and is fixed on described sleeve, and the other end of described pulling shaft is fixed on described base.
2., as the group walking energy collection system in claim 1 as described in any one, wherein said piezoelectric element comprises and going between with a negative electrical charge with multiple piezoelectric ceramic pieces of laminated construction distribution, multiple electrode slice, positive charge lead-in wire; Each electrode slice be placed in two adjacent and between the piezoelectric ceramic piece that polarised direction is contrary; Electrode slice with positive charge is parallel with one another and go between with described positive charge and be connected, and the electrode slice with negative electrical charge is parallel with one another and go between with described negative electrical charge and be connected; Described positive charge lead-in wire is connected with the described rectification circuit of described power collecting device with described negative electrical charge lead-in wire.
3. group walking energy collection system as claimed in claim 2, wherein said rectification circuit is full bridge rectifier.
4. group walking energy collection system as claimed in claim 3, wherein said control circuit is formed by connecting by BJT on-off circuit and MOSFET pipe.
5. group walking energy collection system as claimed in claim 4, wherein said mu balanced circuit comprises the MAX666 chip for exporting fixed voltage.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110443698.0A CN102497134B (en) | 2011-12-26 | 2011-12-26 | Group walking energy collection system |
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| CN201110443698.0A CN102497134B (en) | 2011-12-26 | 2011-12-26 | Group walking energy collection system |
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| CN102497134A CN102497134A (en) | 2012-06-13 |
| CN102497134B true CN102497134B (en) | 2015-03-25 |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102769328A (en) * | 2012-07-24 | 2012-11-07 | 潍柴动力股份有限公司 | Energy recovery device based on piezoelectric effect |
| CN103001332A (en) * | 2012-12-21 | 2013-03-27 | 河南师范大学 | Energy recycling system |
| CN103701362B (en) * | 2013-12-25 | 2015-12-02 | 武汉理工大学 | Composite type piezoelectric power generation system |
| CN109067244B (en) * | 2018-08-28 | 2023-12-15 | 华南理工大学 | Offshore power supply system and power supply method |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1633008A (en) * | 2005-01-04 | 2005-06-29 | 西安交通大学 | Method of piezoelectric power generation by using vibration energy of road surface, and street lighting luminaire system therefor |
| CN101854130A (en) * | 2010-06-28 | 2010-10-06 | 北京大学 | Force-electricity energy converter and array thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1633008A (en) * | 2005-01-04 | 2005-06-29 | 西安交通大学 | Method of piezoelectric power generation by using vibration energy of road surface, and street lighting luminaire system therefor |
| CN101854130A (en) * | 2010-06-28 | 2010-10-06 | 北京大学 | Force-electricity energy converter and array thereof |
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Granted publication date: 20150325 Termination date: 20171226 |