CN103944447A - Self-powered device for capturing vibration energy through three-dimensional drive dual-wafer section-variable system, and method based on device - Google Patents
Self-powered device for capturing vibration energy through three-dimensional drive dual-wafer section-variable system, and method based on device Download PDFInfo
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- CN103944447A CN103944447A CN201410128898.0A CN201410128898A CN103944447A CN 103944447 A CN103944447 A CN 103944447A CN 201410128898 A CN201410128898 A CN 201410128898A CN 103944447 A CN103944447 A CN 103944447A
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Abstract
The invention relates to a self-powered device for capturing vibration energy through a three-dimensional drive dual-wafer section-variable system, and a method based on the device. The device mainly comprises a transverse vibrator and a longitudinal vibrator, wherein the transverse vibrator is composed of a lower vibrator body and an upper vibrator body and specifically comprises a transverse vibration lead-out piece, a snakelike electric conduction electrode, piezoelectric fiber composites, an insulating layer and a neodymium iron boron permanent magnet, and the longitudinal vibrator is composed of a rear vibrator body and a front vibrator body and specifically comprises a longitudinal vibration lead-out piece, a snakelike electric conduction electrode, piezoelectric fiber composites, an insulating layer and a neodymium iron boron permanent magnet. Through the three-dimensional drive dual-wafer section-variable system, energy capturing efficiency is greatly improved, the problem of energy supply of an existing wireless data acquisition device is solved, it is possible that mass data are monitored in real time based on a wireless network, and the device and the method have great significance in forming a health monitoring network of an intelligent and integrated structure and obtaining a health monitoring system of an autonomous and dynamic structure.
Description
Technical field
The present invention relates to a kind of three-dimensional vibrational energy that drives twin lamella variable cross-section and capture self-power supply device and method thereof.
Background technology
It is a kind of method that vibration mechanical energy is converted to electric energy that vibrational energy is captured self-powered technology.In recent years, the technology such as wireless senser are widely used in industrial circle, but traditional wireless sensor network node often adopts powered battery, on the one hand, periodic replacement battery not only affects that normal work, the workload of wireless sensor network is large, cost is high, and some application battery altering is extremely inconvenient; On the other hand, having restricted greatly computing capability, ability to communicate, storage capacity and the data acquisition ability of sensor node, is the critical bottleneck of wireless sensor network in commercial Application.
Therefore, study and a kind ofly can from the sustained vibration of surrounding environment, obtain electric energy, vibrational energy is caught self-powered technology, just more and more comes into one's own.Potential application comprises equipment condition monitoring, monitoring structural health conditions, environmental monitoring etc.
Summary of the invention
The object of the invention is to provide vibrational energy to capture self-power supply device and method thereof, the high problem of periodic replacement, use cost that can solve on the one hand the battery-powered of traditional wireless sensor networks technology existence and bring, the problem that current self-power wireless sensor network prisoner energy technical efficiency is low, Power supply is not enough can be solved on the other hand, monitoring field can be solved in essence to wireless sensor network computing capability, communication capacity, the demand of data acquisition ability to Power supply.
For achieving the above object, technical scheme of the present invention is: a kind of three-dimensional vibrational energy that drives twin lamella variable cross-section is captured self-power supply device, comprise that horizontal oscillator and longitudinal vibrator two parts form, wherein laterally oscillator is made up of lower oscillator and upper oscillator two parts, specifically comprises that transverse vibration derives sheet, snakelike conductive electrode, piezoelectric fabric compound, insulating barrier, Nd-Fe-B permanent magnet; Longitudinal vibrator by rear oscillator before oscillator and two parts form, specifically comprise that wherein extensional vibration derives sheet, snakelike conductive electrode, piezoelectric fabric compound, insulating barrier, Nd-Fe-B permanent magnet, laterally oscillator and longitudinal vibrator are included in antimagnetic outer cover.
Further, four between two with respect to the non-uniform beam that becomes groined type, the opposite face of the non-uniform beam of one-tenth groined type facing each other respectively has a slice homopolarity Nd-Fe-B permanent magnet, permanent magnet and the opposite side of offside are also homopolarities simultaneously, each beam one end is fixedly connected with housing, the vertical cutting line parallel of self-power supply device one side and monitored member simultaneously, opposite side is parallel with the horizontal tangent of monitored member.
Further, middle girder both sides respectively have one deck to prevent the ceramic layer of piezoelectric patches charge leakage, and piezoelectric smart material is made up of pottery or polymer, on piezoelectric patches, be used for transmission charge electrode adopt interdigital electrode, more effectively transmission charge.
Further, adopt antimagnetic outer cover, to eliminate the electromagnetic effect of permanent magnet generation of vibration.
Drive the vibrational energy of twin lamella variable cross-section to capture a method for self-power supply device based on three-dimensional, realized by following steps:
Step 1, extraneous vibration are transmitted to the three-dimensional vibrational energy that drives twin lamella variable cross-section and capture self-power supply device, will comprise the vibration that laterally changes self with longitudinal vibrational energy into by vibrating reed;
Step 2, the horizontal or large side of extensional vibration energy, amplitude is greater than opposite side, and the side that amplitude is large is first vibrated, and opposite side vibrates at random under the drive of permanent-magnet pole; In the time that amplitude is suitable, starting of oscillation simultaneously;
Step 3, oscillator vibration drive the vibration of piezoelectric fabric compound, and then produce electric energy, outwards transmit by snakelike conductive electrode, realize capturing of energy.
Prisoner's energy efficiency that the vibrational energy of three-dimensional driving twin lamella variable cross-section of the present invention is captured self-power supply device and method thereof is very high.Meanwhile, the electric energy that can avoid the use of battery to bring exhausts secondary and changes problem, and the instable problem of battery, can avoid occurring in node use procedure the discontinuity problem of signal.Due to self-power supply device of the present invention can be real-time mechanical vibrational energy is converted to electric energy, therefore do not need expensive energy saving device yet, significantly reduce the manufacturing cost of wireless sensor network.Can build on this basis without powered battery, dispose flexible, autgmentability structural healthy monitoring system strong, convenient for installation and maintenance.
Brief description of the drawings
Fig. 1 represents the three-dimensional schematic diagram that drives the vibrational energy of twin lamella variable cross-section to capture self-power supply device, and Figure 1A is front view, and Figure 1B is vertical view;
Fig. 2 represents the schematic diagram in non-uniform beam a period of time, and Fig. 2 A is vertical view, and Fig. 2 B is front view;
Fig. 3 represents the three major types case of motion classification schematic diagram of the collaborative vibration of cantilever beam group, Fig. 3 A is the case of motion that transverse vibration is greater than extensional vibration, Fig. 3 B is the case of motion that transverse vibration is less than extensional vibration, Fig. 3 C is the case of motion that transverse vibration equals extensional vibration, wherein, each large type games situation is divided into again six groups.
In figure, one, horizontal oscillator, two, longitudinal vibrator, a, lower oscillator, b, oscillator, c, rear oscillator, d, front oscillator, 1, transverse vibration derives sheet, 2, snakelike conductive electrode, 3, piezoelectric fabric compound, 4, insulating barrier, 5, Nd-Fe-B permanent magnet, 6, sheet is derived in extensional vibration, and 7, snakelike conductive electrode, 8, piezoelectric fabric compound, 9, insulating barrier, 10, Nd-Fe-B permanent magnet, 11, antimagnetic outer cover.
Embodiment
In an embodiment of the invention, comprise two pairs of orthogonal piezoelectric vibrators of mounting plane: laterally oscillator () and longitudinal vibrator (two), laterally oscillator () having comprised: transverse vibration derives sheet, snakelike conductive electrode, piezoelectric fabric compound, insulating barrier, Nd-Fe-B permanent magnet five parts.Longitudinal vibrator (two) having comprised: sheet, snakelike conductive electrode, piezoelectric fabric compound, insulating barrier, Nd-Fe-B permanent magnet five parts are derived in extensional vibration.The compound mode of two pairs of piezoelectric vibrators is shown in accompanying drawing 1, between two pairs of piezoelectric vibrators, be mutual vertical relation, and wherein the mounting plane of a pair of piezoelectric vibrator is vertical with a vertical side of track, it is parallel with level one side that a pair of piezoelectric vibrator is pressed close to the horizontal side of monitored structure in addition, and two pairs of permanent magnets inner sides of oscillator end are same pole.
In yet another embodiment of the present invention, the structure of described piezoelectric vibrator is that the upper and lower both sides of elastic base plate respectively cover one deck insulation adhesive linkage and prevent that electric charge from leaking, then by adhesive linkage, piezoelectric fabric compound is being carried out bonding, the surface of piezoelectric patches is coated with snakelike conductive electrode (increasing the conductive area of electrode), and permanent magnet is fixed on the free end of Cantilever Beams of Variable Cross Section.
In yet another embodiment of the present invention, the upper and lower two-layer piezoelectric fabric of same piezoelectric vibrator adopts and is connected in series, piezoelectric fabric between different piezoelectric vibrators adopts and is connected in parallel, and the series connection between piezoelectric fabric can improve output voltage, and the parallel connection between piezoelectric fabric can improve output current.
Self-powered method of the present invention, be to rely on structure to be subject to the vibrational excitation constantly changing from outside, the vibration frequency place of a structure scope, this scope has comprised the resonance frequency of cantilever beam, thereby extends to the duration of collection of energy memory circuit supply electric energy.
In assembling process of the present invention, the outer cover that cantilever beam is installed adopts antimagnetic outer cover, to eliminate the adverse effect because dither produces electromagnetic signal, input being produced in cantilever beam vibration processes.
The three-dimensional vibrational energy that drives twin lamella variable cross-section is captured self-power supply device and method thereof, and it is realized by following steps:
Step 1, extraneous vibration are transmitted to self-power supply device, by vibrating reed (1 or 6), vibrational energy are changed (comprising transverse-vibration kinetic energy and extensional vibration energy) into the vibration of self;
Shuttle belt dynamic pressure electricity fibre composites (the 3 or 8) vibration of step 2, vibrating reed, the vibration situation of piezoelectric vibrator (one or two) is divided three kinds of situations: (being described taking front view as object)
(i) be greater than the situation of transverse vibration for extensional vibration, the laterally first upwards starting of oscillation of a oscillator in a period of time (one), b oscillator vibrates under repulsion effect and then upwards; The c oscillator of longitudinal vibrator (two) can vibrate forward because of transverse vibration, but because extensional vibration is greater than transverse vibration, make the amplitude in horizontal a period of time (one) be greater than longitudinal vibrator (twos') amplitude, so in the time of the starting of oscillation of c oscillator, a oscillator can produce repulsion to it and stop its vibration, in extensional vibration during much larger than transverse vibration, c oscillator is to after vibration, and d oscillator can vibration forward under the repulsion of a oscillator; A, the resilience of b oscillator, c, d oscillator be resilience simultaneously also, then a oscillator vibration downwards under the repulsion effect of b oscillator, and c, d oscillator move downward the repulsion effect of generation because repulsion effect each other adds b oscillator, make c oscillator again to after vibration, d oscillator is vibration forward again.Vibration is so carried out, and goes round and begins again;
(ii) be greater than the situation of extensional vibration for transverse vibration, the c oscillator starting of oscillation first forward of longitudinal vibrator (two), d oscillator vibrates under repulsion effect and then forward; Laterally a oscillator of oscillator () can upwards vibrate because of extensional vibration, but because transverse vibration is greater than extensional vibration, make the amplitude in longitudinal a period of time (two) be greater than horizontal oscillator (one's) amplitude, so in the time of the starting of oscillation of a oscillator, c oscillator can produce repulsion to it and stop its vibration, in transverse vibration, during much larger than extensional vibration, a oscillator can vibrate downwards because of repulsion effect, and b oscillator can upwards vibration under the repulsion effect of c oscillator; C, the resilience of d oscillator, a, b oscillator be simultaneously resilience also, and then c oscillator is to after vibration under the repulsion effect of d oscillator, and a, b oscillator add move the backward repulsion effect of generation of d oscillator because of repulsion effect each other, make the vibration downwards again of a oscillator, b oscillator is upwards vibration again.Vibration is so carried out, and goes round and begins again;
(iii) equal the situation of extensional vibration for transverse vibration, a, the starting of oscillation simultaneously of c oscillator, with the repulsion effect because of magnetic pole, amplitude is reduced each other, but the vibration that repulsion is derived than vibrating reed is little, thereby a is moved upward, c travels forward, and under repulsion effect, b, d be upwards vibration forward respectively also; B, d resilience, b, d also can be because the repulsion effect amplitude of magnetic pole reduces, but repulsion is also little than vibration force, so b vibrates downwards, d moves backward, and under repulsion effect, a, c be motion backward downwards respectively also.
Step 3, oscillator vibration drive the vibration of piezoelectric fabric compound, and then produce electric energy, outwards transmit by snakelike conductive electrode, realize capturing of energy.
The invention has the advantages that: prisoner's energy efficiency that the vibrational energy of three-dimensional driving twin lamella variable cross-section is captured self-power supply device and method thereof is very high, minimum is two cantilever beam vibrations, most of the time is that four cantilever beams vibrate simultaneously, and because the vibration of monitored structure is in a frequency range, adding of permanent magnet is in the vibration frequency range of rail the resonance frequency reduction of piezoelectric vibrator, therefore piezoelectric vibrator there will be the situation of resonance in vibration processes, has further improved prisoner's energy efficiency of self-powered system.Meanwhile, the electric energy that can avoid the use of battery to bring exhausts secondary and changes problem, and the instable problem of battery; Can avoid occurring in node use procedure the discontinuity problem of signal.Due to self-power supply device of the present invention can be real-time mechanical vibrational energy is converted to electric energy, therefore do not need expensive energy saving device yet, significantly reduce the manufacturing cost of wireless sensor network.Can build on this basis without powered battery, dispose flexible, autgmentability structural healthy monitoring system strong, convenient for installation and maintenance.
Technique scheme has only embodied the optimal technical scheme of technical scheme of the present invention, and those skilled in the art have all embodied principle of the present invention to some variations that wherein some part may be made, within belonging to protection scope of the present invention.
Claims (5)
1. a three-dimensional vibrational energy that drives twin lamella variable cross-section is captured self-power supply device, it is characterized in that: comprise that horizontal oscillator () and longitudinal vibrator (two) two parts form, wherein laterally oscillator () is made up of lower oscillator (a) and upper oscillator (b) two parts, specifically comprises that transverse vibration derives sheet (1), snakelike conductive electrode (2), piezoelectric fabric compound (3), insulating barrier (4), Nd-Fe-B permanent magnet (5); Longitudinal vibrator (two) is made up of the front oscillator of rear oscillator (c) (d) and two parts, specifically comprise wherein extensional vibration derivation sheet (6), snakelike conductive electrode (7), piezoelectric fabric compound (8), insulating barrier (9), Nd-Fe-B permanent magnet (10), laterally oscillator and longitudinal vibrator are included in antimagnetic outer cover (11).
2. a kind of three-dimensional vibrational energy that drives twin lamella variable cross-section according to claim 1 is captured self-power supply device, it is characterized in that: four between two with respect to the non-uniform beam that becomes groined type, the opposite face of the non-uniform beam of one-tenth groined type facing each other respectively has a slice homopolarity Nd-Fe-B permanent magnet, permanent magnet and the opposite side of offside are also homopolarities simultaneously, each beam one end is fixedly connected with housing, the vertical cutting line parallel of self-power supply device one side and monitored member simultaneously, opposite side is parallel with the horizontal tangent of monitored member.
3. a kind of three-dimensional vibrational energy that drives twin lamella variable cross-section according to claim 2 is captured self-power supply device, it is characterized in that: middle girder both sides respectively have one deck to prevent the ceramic layer of piezoelectric patches charge leakage, piezoelectric smart material is made up of pottery or polymer, on piezoelectric patches, be used for transmission charge electrode adopt interdigital electrode.
4. a kind of three-dimensional vibrational energy that drives twin lamella variable cross-section according to claim 1 is captured self-power supply device, it is characterized in that: adopt antimagnetic outer cover, to eliminate the electromagnetic effect of permanent magnet generation of vibration.
5. based on a three-dimensional method that drives the vibrational energy of twin lamella variable cross-section to capture self-power supply device claimed in claim 1, it is characterized in that, comprise the following steps:
Step 1, extraneous vibration are transmitted to the three-dimensional vibrational energy that drives twin lamella variable cross-section claimed in claim 1 and capture self-power supply device, will comprise the vibration that laterally changes self with longitudinal vibrational energy into by vibrating reed (1 or 6);
Step 2, the horizontal or large side of extensional vibration energy, amplitude is greater than opposite side, and the side that amplitude is large is first vibrated, and opposite side vibrates at random under the drive of permanent-magnet pole; In the time that amplitude is suitable, starting of oscillation simultaneously;
Step 3, oscillator vibration drive the vibration of piezoelectric fabric compound, and then produce electric energy, outwards transmit by snakelike conductive electrode, realize capturing of energy.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410128898.0A CN103944447B (en) | 2014-04-01 | 2014-04-01 | Self-powered device for capturing vibration energy through three-dimensional drive dual-wafer section-variable system, and method based on device |
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| CN201410128898.0A CN103944447B (en) | 2014-04-01 | 2014-04-01 | Self-powered device for capturing vibration energy through three-dimensional drive dual-wafer section-variable system, and method based on device |
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| CN103944447A true CN103944447A (en) | 2014-07-23 |
| CN103944447B CN103944447B (en) | 2017-01-25 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104868784A (en) * | 2015-04-28 | 2015-08-26 | 南京航空航天大学 | Piezoelectric oscillator structure for vibration energy recycling |
| CN109067240A (en) * | 2018-07-17 | 2018-12-21 | 同济大学 | A kind of beam type piezoelectric energy collector with cavity |
| CN118300447A (en) * | 2024-06-05 | 2024-07-05 | 太原理工大学 | Self-energy-harvesting wireless sensor network node oriented to heading machine and application method thereof |
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| US20130154439A1 (en) * | 2011-12-16 | 2013-06-20 | Electronics And Telecommunications Research Institute | Energy harvesting devices and methods of fabricating the same |
| CN203278697U (en) * | 2013-01-11 | 2013-11-06 | 浙江工商大学 | Wide-frequency-band multi-direction vibration energy harvester |
| CN103401471A (en) * | 2013-07-25 | 2013-11-20 | 瑞声科技（南京）有限公司 | Piezoelectric ceramic-based energy recovery system and handheld equipment |
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Patent Citations (4)
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| US20130154439A1 (en) * | 2011-12-16 | 2013-06-20 | Electronics And Telecommunications Research Institute | Energy harvesting devices and methods of fabricating the same |
| CN103023377A (en) * | 2012-12-24 | 2013-04-03 | 成都理工大学 | Piezoelectric and electromagnetic hybrid variable-frequency micro-power generation assembly and method for same |
| CN203278697U (en) * | 2013-01-11 | 2013-11-06 | 浙江工商大学 | Wide-frequency-band multi-direction vibration energy harvester |
| CN103401471A (en) * | 2013-07-25 | 2013-11-20 | 瑞声科技（南京）有限公司 | Piezoelectric ceramic-based energy recovery system and handheld equipment |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104868784A (en) * | 2015-04-28 | 2015-08-26 | 南京航空航天大学 | Piezoelectric oscillator structure for vibration energy recycling |
| CN109067240A (en) * | 2018-07-17 | 2018-12-21 | 同济大学 | A kind of beam type piezoelectric energy collector with cavity |
| CN118300447A (en) * | 2024-06-05 | 2024-07-05 | 太原理工大学 | Self-energy-harvesting wireless sensor network node oriented to heading machine and application method thereof |
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