CN103944447B - 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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- CN103944447B CN103944447B CN201410128898.0A CN201410128898A CN103944447B CN 103944447 B CN103944447 B CN 103944447B CN 201410128898 A CN201410128898 A CN 201410128898A CN 103944447 B CN103944447 B CN 103944447B
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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 capture self-power supply device driving twin lamella variable cross-section and its method.
Background technology
Vibrational energy capture confession power technology is a kind of method that vibration mechanical energy is converted to electric energy.In recent years, wirelessly
The technology such as sensor are widely used in industrial circle, but traditional wireless sensor network node is often powered using battery,
On the one hand, periodic replacement battery not only affects that the normal work of wireless sensor network, workload be big, high cost, and some
Application battery altering is extremely inconvenient；On the other hand, greatly constrain the computing capability of sensor node, ability to communicate,
Storage capacity and data acquisition ability, are critical bottlenecks in commercial Application for the wireless sensor network.
Therefore, research is a kind of can obtain electric energy from the sustained vibration of surrounding, i.e. vibrational energy capture self-powered
Technology, is just increasingly taken seriously.Potential application includes equipment condition monitoring, monitoring structural health conditions, environmental monitoring etc..
Content of the invention
The invention aims to providing vibrational energy capture self-power supply device and its method, on the one hand can solve to pass
The high problem of exist battery-powered of system wireless sensor network technology and the periodic replacement that brings, use cost, the opposing party
Face can solve the problems, such as that current self-power wireless sensor network prisoner can technical efficiency be low, energy supply is not enough, can essence
The demand that upper solution monitoring field supplies to energy to wireless sensor network computing capability, communication capacity, data acquisition ability.
For achieving the above object, the technical scheme is that a kind of three-dimensional vibrational energy driving twin lamella variable cross-section
Capture self-power supply device, is constituted including horizontal oscillator and longitudinal vibrator two parts, and wherein horizontal oscillator is by lower oscillator and upper oscillator
Two parts form, and specifically including oscillation crosswise derives piece, snakelike conductive electrode, piezo fiber composite, insulating barrier, neodymium iron boron forever
Magnet；Longitudinal vibrator is made up of oscillator before rear oscillator and two parts, and specifically including wherein extensional vibration derives piece, snakelike conductive electricity
Pole, piezo fiber composite, insulating barrier, Nd-Fe-B permanent magnet, horizontal oscillator and longitudinal vibrator are included in antimagnetic outer housing.
Further, four two-by-two with respect to become groined type non-uniform beam, the non-uniform beam of one-tenth groined type facing each other
Opposite face respectively have a piece of homopolarity Nd-Fe-B permanent magnet, the permanent magnet of offside and opposite side are also homopolarity simultaneously, each beam one
End is fixedly connected with the casing, and self-power supply device side is parallel with the vertical tangent line of monitored component simultaneously, opposite side with monitored
The horizontal tangent of component is parallel.
Further, respectively there is one layer of ceramic layer preventing piezoelectric patches charge leakage on middle girder both sides, piezoelectric smart material by
Pottery or polymer are constituted, and electrode piezoelectric patches being used for transmit electric charge adopts interdigital electrode, more effectively transmit electric charge.
Further, using antimagnetic outer housing, to eliminate the electromagnetic effect that permanent magnet vibration produces.
A kind of method capturing self-power supply device based on the three-dimensional vibrational energy driving twin lamella variable cross-section, by following steps
Realize:
Step one, extraneous vibration are transmitted to the three-dimensional vibrational energy capture self-power supply device driving twin lamella variable cross-section, lead to
Cross vibrating reed and the vibrational energy including laterally and longitudinally is changed into the vibration of itself；
The big side of step 2, transversely or longitudinally vibrational energy, amplitude is more than opposite side so that the big side of amplitude is first
Vibration, opposite side vibrates under the drive of permanent-magnet pole at random；When amplitude is suitable, it will starting of oscillation simultaneously；
Step 3, oscillator vibration drive the vibration of piezo fiber composite, and then produce electric energy, by snakelike conductive electrode
Outwards transmit, realize the capture of energy.
The three-dimensional vibrational energy driving twin lamella variable cross-section of the present invention captures prisoner's efficiency of self-power supply device and its method
Rate is very high.Meanwhile, the electric energy that the use of battery brings can be avoided to exhaust secondary replacing problem, and battery is instable asks
Topic, can avoid node the discontinuity problem of signal during using.Self-power supply device due to the present invention can be real-time
Mechanical vibrational energy is converted to electric energy, therefore also without expensive energy saving device, wireless sensor network is greatly lowered
Manufacturing cost.Can build on this basis and power without battery, dispose knot flexible, that autgmentability is strong, convenient for installation and maintenance
Structure health monitoring system.
Brief description
Fig. 1 represents that the three-dimensional vibrational energy driving twin lamella variable cross-section captures the schematic diagram of self-power supply device, and Fig. 1 a is just
View, Fig. 1 b is top view；
Fig. 2 represents the schematic diagram in non-uniform beam a period of time, and Fig. 2 a is top view, and Fig. 2 b is front view；
Fig. 3 represents that cantilever beam group works in coordination with the three major types case of motion classification schematic diagram of vibration, and Fig. 3 a is more than for oscillation crosswise
The case of motion of extensional vibration, Fig. 3 b is less than the case of motion of extensional vibration for oscillation crosswise, and Fig. 3 c is equal to vertical for oscillation crosswise
To the case of motion of vibration, wherein, each big class case of motion is divided into six groups again.
In figure, one, horizontal oscillator, two, longitudinal vibrator, a, lower oscillator, b, oscillator, c, rear oscillator, d, front oscillator, 1, laterally
Piece, the 2, first snakelike conductive electrode, the 3, first piezo fiber composite, the 4, first insulating barrier, the 5, first neodymium iron boron are derived in vibration
Permanent magnet, 6, extensional vibration derive piece, the 7, second snakelike conductive electrode, the 8, second piezo fiber composite, the 9, second insulating barrier,
10th, the second Nd-Fe-B permanent magnet, 11, antimagnetic outer housing.
Specific embodiment
In an embodiment of the invention, comprise the orthogonal piezoelectric vibrator of two pairs of mounting plane: laterally oscillator
(1) and longitudinal vibrator (two), horizontal oscillator () includes: it is multiple that oscillation crosswise derives piece, snakelike conductive electrode, piezoelectric fabric
Compound, insulating barrier, Nd-Fe-B permanent magnet five part.Longitudinal vibrator (two) include: piece, snakelike conductive electricity are derived in extensional vibration
Pole, piezo fiber composite, insulating barrier, Nd-Fe-B permanent magnet five part.The compound mode of two pairs of piezoelectric vibrators is shown in accompanying drawing 1, two
To being in be mutually perpendicular to relation between piezoelectric vibrator, and the mounting plane of one pair of which piezoelectric vibrator is hung down with the vertical side of track
Directly, another pair piezoelectric vibrator press close to monitored structure horizontal side parallel with horizontal side, and two pairs of permanent magnetism of oscillator end
Internal side is 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 layer of insulation adhesive linkage prevents electric charge from leaking, and then by adhesive linkage, piezo fiber composite is being carried out bonding, piezoelectric patches
Surface 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 piezoelectric fabric of two-layer up and down of same piezoelectric vibrator is connected using series connection
Connect, using being connected in parallel, the series connection between piezoelectric fabric can improve output voltage to the piezoelectric fabric between different piezoelectric vibrators, pressure
Parallel connection between electric fiber can improve output current.
The confession method for electrically of the present invention, is to rely on structure to be subject to the vibrational excitation being continually changing from outside, structure
A scope at frequency of vibration, this scope includes the resonant frequency of cantilever beam, thus extend storing electricity to collection of energy
The persistent period of electric energy is supplied on road.
In the assembling process of the present invention, the outer housing installing cantilever beam adopts antimagnetic outer housing, to eliminate in cantilever beam vibration
During because dither produce electromagnetic signal and to signal detection produce adverse effect.
The three-dimensional vibrational energy capture self-power supply device driving twin lamella variable cross-section and its method, it is come real by following steps
Existing: step one, extraneous vibration are transmitted to self-power supply device, by vibrating reed (1 or 6) by vibrational energy (include transverse-vibration kinetic energy with
Extensional vibration energy) it is changed into the vibration of itself；
Step 2, the shuttle belt of vibrating reed move piezo fiber composite (3 or 8) vibration, and piezoelectric vibrator (one or two) shake
Emotionally shape divides three kinds of situations: (being described with front view) for object
I () is more than the situation of oscillation crosswise, a oscillator starting of oscillation upwards first of horizontal a period of time () for extensional vibration, b shakes
Son and then vibrates under repulsion effect upwards；The c oscillator of longitudinal vibrator (two) can vibrate forward because of oscillation crosswise, but because vertical
To vibration more than oscillation crosswise so that the amplitude in horizontal a period of time (one) is more than the amplitude of longitudinal vibrator (two), so when c oscillator rises
When shaking, a oscillator can produce repulsion and stop its vibration to it, and when extensional vibration is much larger than oscillation crosswise, c oscillator shakes backward
Dynamic, and d oscillator can vibrate forward under the repulsion of a oscillator；A, b oscillator resilience, the also resilience simultaneously of c, d oscillator, then a oscillator exist
The repulsion effect of b oscillator is lower to be vibrated downwards, and c, d oscillator moves downward generation because of repulsion effect each other plus b oscillator
Repulsion acts on so that c oscillator vibrates again backward, and d oscillator vibrates forward again.Vibration is so carried out, and goes round and begins again；
(ii) oscillation crosswise is more than to the situation of extensional vibration, the c oscillator starting of oscillation forward first of longitudinal vibrator (two), d
Oscillator and then vibrates forward under repulsion effect；Laterally a oscillator of oscillator () can vibrate upwards because of extensional vibration, but because
Oscillation crosswise is more than extensional vibration so that the amplitude of longitudinal a period of time (two) is more than the amplitude of horizontal oscillator (), so working as a oscillator
When starting of oscillation, c oscillator can produce repulsion and stop its vibration to it, and when oscillation crosswise is much larger than extensional vibration, a oscillator can be because
Repulsion acts on and vibrates downwards, and b oscillator can vibrate under the repulsion effect of c oscillator upwards；C, d oscillator resilience, a, b oscillator is also same
When resilience, then c oscillator vibrate backward under the repulsion effect of d oscillator, a, b oscillator is because repulsion effect each other is plus d
The repulsion that oscillator rearward movement produces acts on so that a oscillator vibrates downwards again, and b oscillator vibrates again up.
Vibration is so carried out, and goes round and begins again；
(iii) oscillation crosswise is equal to the situation of extensional vibration, the starting of oscillation simultaneously of a, c oscillator, uses each other because magnetic
The repulsion effect of pole makes amplitude reduce, but repulsion is little compared to the vibration that vibrating reed is derived, so that a moves upwards, c
Travel forward, under repulsion effect, b, d also vibrate forward respectively upwards；B, d resilience, b, d also can be because of the effects of the repulsion of magnetic pole
Amplitude reduces, but repulsion is also little compared to vibration force, so b vibrates downwards, d rearward movement, and under repulsion effect, a, c
Rearward movement separately down.
Step 3, oscillator vibration drive the vibration of piezo fiber composite, and then produce electric energy, by snakelike conductive electrode
Outwards transmit, realize the capture of energy.
It is an advantage of the current invention that: the three-dimensional vibrational energy capture self-power supply device driving twin lamella variable cross-section and its method
Prisoner can efficiency very high, minimum is two cantilever beam vibrations, and the most of the time is that four cantilever beams vibrate simultaneously, and due to
The vibration of monitored structure is in a frequency range, and the addition of permanent magnet makes the resonant frequency reduction of piezoelectric vibrator be in steel
In the vibration frequency range of rail, therefore piezoelectric vibrator occurs the situation of resonance in vibration processes, further increases confession
The prisoner of electric system can efficiency.Meanwhile, the electric energy that the use of battery brings can be avoided to exhaust secondary replacing problem, and battery is unstable
Qualitatively problem；Can avoid node that the discontinuity problem of signal occurs during using.Self-power supply device due to the present invention
In real time mechanical vibrational energy can be converted to electric energy, therefore also without expensive energy saving device, wireless biography be greatly lowered
The manufacturing cost of sensor network.Can build on this basis power without battery, dispose flexibly, autgmentability is strong, install and safeguard
Convenient structural healthy monitoring system.
Technique scheme only embodies the optimal technical scheme of technical scheme, the technology people of the art
Some variations that member may make to some of which part all embody the principle of the present invention, belong to protection scope of the present invention
Within.
Claims (3)
1. a kind of three-dimensional vibrational energy capture self-power supply device driving twin lamella variable cross-section it is characterised in that: include transverse-vibration
Sub (one) and longitudinal vibrator (two) two parts are constituted, and wherein horizontal oscillator () is by lower oscillator (a) and upper oscillator (b) two parts group
Become, specifically including oscillation crosswise derives piece (1), the first snakelike conductive electrode (2), the first piezo fiber composite (3), first exhausted
Edge layer (4), the first Nd-Fe-B permanent magnet (5)；Longitudinal vibrator (two) is made up of rear oscillator (c) and front oscillator (d) two parts, specifically
Derive piece (6), the second snakelike conductive electrode (7), the second piezo fiber composite (8), the second insulation including wherein extensional vibration
Layer (9), the second Nd-Fe-B permanent magnet (10), horizontal oscillator () and longitudinal vibrator (two) are included in antimagnetic outer housing (11)；
Four two-by-two with respect to become groined type Cantilever Beams of Variable Cross Section, the Cantilever Beams of Variable Cross Section of one-tenth groined type facing each other relative
Respectively there is a piece of homopolarity Nd-Fe-B permanent magnet in face, and the permanent magnet of offside and opposite side are also homopolarity simultaneously, each beam one end and shell
Body is fixedly connected, and self-power supply device side is parallel with the vertical tangent line of monitored component simultaneously, opposite side and monitored component
Horizontal tangent is parallel.
2. a kind of three-dimensional vibrational energy capture self-power supply device driving twin lamella variable cross-section according to claim 1, its
It is characterised by: using antimagnetic outer housing, to eliminate the electromagnetic effect that permanent magnet vibration produces.
3. a kind of side capturing self-power supply device based on the three-dimensional vibrational energy driving twin lamella variable cross-section described in claim 1
Method is it is characterised in that comprise the following steps:
The three-dimensional vibrational energy driving twin lamella variable cross-section that step one, extraneous vibration are transmitted to described in claim 1 is captured certainly
Electric supply installation, derives piece (1) by oscillation crosswise or extensional vibration is derived piece (6) and changed the vibrational energy including laterally and longitudinally
Vibration for itself；
The big side of step 2, transversely or longitudinally vibrational energy, amplitude is more than opposite side so that the big side of amplitude first shakes
Dynamic, opposite side vibrates under the drive of permanent-magnet pole at random；When amplitude is suitable, it will starting of oscillation simultaneously；
Step 3, oscillator vibration drive the vibration of piezo fiber composite, and then produce electric energy, outside by snakelike conductive electrode
Transmission, realizes the capture of energy.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| 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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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| 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 CN103944447A (en) | 2014-07-23 |
| CN103944447B true CN103944447B (en) | 2017-01-25 |
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| CN104868784A (en) * | 2015-04-28 | 2015-08-26 | 南京航空航天大学 | Piezoelectric oscillator structure for vibration energy recycling |
| CN109067240B (en) * | 2018-07-17 | 2019-12-27 | 同济大学 | Beam type piezoelectric energy collector with cavity |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
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| KR101774301B1 (en) * | 2011-12-16 | 2017-09-20 | 한국전자통신연구원 | energy harvesting device and manufacturing of the same |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
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