CN102080638B - Hydraulic principle-based piezoelectric microvibration energy converter - Google Patents
Hydraulic principle-based piezoelectric microvibration energy converter Download PDFInfo
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- CN102080638B CN102080638B CN201010595019.7A CN201010595019A CN102080638B CN 102080638 B CN102080638 B CN 102080638B CN 201010595019 A CN201010595019 A CN 201010595019A CN 102080638 B CN102080638 B CN 102080638B
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- 230000000694 effects Effects 0.000 claims abstract description 14
- 239000010720 hydraulic oil Substances 0.000 claims description 12
- 239000003921 oil Substances 0.000 claims description 12
- 238000009434 installation Methods 0.000 claims description 7
- 239000000463 material Substances 0.000 claims description 6
- 230000007613 environmental effect Effects 0.000 claims description 5
- 238000009527 percussion Methods 0.000 claims description 3
- 238000000034 method Methods 0.000 abstract description 9
- 238000003912 environmental pollution Methods 0.000 abstract description 4
- 238000005516 engineering process Methods 0.000 abstract description 3
- 230000002093 peripheral effect Effects 0.000 abstract 1
- 230000003321 amplification Effects 0.000 description 4
- 238000003199 nucleic acid amplification method Methods 0.000 description 4
- 230000007812 deficiency Effects 0.000 description 2
- 238000004146 energy storage Methods 0.000 description 2
- 230000008054 signal transmission Effects 0.000 description 2
- 230000009466 transformation Effects 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
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Abstract
The invention relates to an energy converter, in particular to a hydraulic principle-based piezoelectric microvibration energy converter. The hydraulic principle-based piezoelectric microvibration energy converter can collect energy, comprising energy sources such as solar energy, heat energy, mechanical energy and the like capable of producing vibration frequency, from a peripheral environment, amplifies a vibration force in the environment by utilizing a hydraulic principle, makes the vibration force act on a piezoelectric device, produces electric energy by utilizing the piezoelectric effect of the piezoelectric device and supplies power to a sensor or other low-power consumption loads. The technology is based on microvibration energy, so the hydraulic principle-based piezoelectric microvibration energy converter has long service life, is not limited by utilization capacity and hardly required to be replaced and avoids the problems of environmental pollutions; in addition, the working process of the energy converter is a physical process, and a working medium is substantially not influenced by the environment, so the hydraulic principle-based piezoelectric microvibration energy converter can avoid limitations to working environments, expand the application range of the sensor and the like and better using effects.
Description
Technical field
The present invention relates to a kind of enegrgy converter, particularly a kind of piezoelectric micro-vibration enegrgy converter based on hydraulic principle.
Background technique
In " wisdom city " built, need to use to widely apply and arrive various sensors.If these sensors all use " wired " mode signal transmission and power supply, just must lay in advance a large amount of cables, construction and maintenance cost are all very huge.Along with technological progress, wireless sensor network is applied gradually in fields such as electric power, traffic and national defence.Wireless sensor network, by mode signal transmissions such as GPRS, WiFi, bluetooths, has solved and has laid the series of problems that communication cable brings.Yet its deficiency is, aspect node power supply, the wireless senser of prior art is mainly used high energy density cells power supply, energy-storage battery capacity is fixed, in use between on be subject to a lot of restrictions, constantly changing in the process of battery, discarded battery has also brought environmental pollution, in addition, the Environmental Conditions of energy-storage battery is also restricted, has the hidden danger of blast under the complex environment such as moist, hot.
Summary of the invention
The object of the invention is to overcome the deficiencies in the prior art part and provide a kind of and reduce service time, the piezoelectric micro-vibration enegrgy converter based on hydraulic principle of Environmental Conditions restriction, environmental protection.
The present invention is achieved through the following channels:
A kind of piezoelectric micro-vibration enegrgy converter based on hydraulic principle, include T-shaped housing, hydraulic pressure installation, piezoelectric device and power-converting device, T-shaped housing includes larger cross-section portion and small cross sections portion, hydraulic pressure installation includes shake unit, small piston, hydraulic oil, oil hydraulic cylinder and large piston, oil hydraulic cylinder is positioned at the handing-over position of T-shaped housing inner chamber larger cross-section portion and small cross sections portion, in cylinder, be full of hydraulic oil, oil hydraulic cylinder is positioned at housing inner chamber small cross sections portion one side small piston is installed, be positioned at larger cross-section portion one side large piston is installed, shake unit one end is connected with small piston outer side surface, large piston is connected with power-converting device by piezoelectric device.
Select the shake unit that exists maximum frequencies to be close in the natural frequency of vibration and Environmental Conditions, like this, the micro-center of percussion shake unit of low frequency in environment easily resonates, shake unit can also directly receive the strong vibration source of vibrational energy in addition, shake unit is by gathering the vibrational energy of environment with upper type, and pass to small piston, by small piston, pass to hydraulic oil again, because the oil hydraulic cylinder at hydraulic oil place converts to large-section via small bore, in same pressure situation, pressure is exaggerated, according to hydraulic principle, it is large that magnification factor equals, the cross-section area ratio of small piston.Large piston is received the vibration force of the amplification of being transmitted by hydraulic oil, directly pushes piezoelectric device, and according to piezoelectric effect principle, this piezoelectric device surface produces electric charge, and this electric charge is processed formation direct current via power-converting device and used for external loading.
Enegrgy converter of the present invention can be collected the energy of surrounding enviroment, comprise that solar energy, heat energy, mechanical energy etc. can produce the energy source of vibration frequency, utilize hydraulic principle, after the vibration force in environment is amplified, be applied on piezoelectric device, utilize the piezoelectric effect of piezoelectric device to produce electric energy, for sensor or other low power consumption load supplyings, because this technology is based on micro-energy that shakes, so service time is long, is not used capacity limit, almost, without replacing, there is no environmental pollution problem; In addition, transformation of energy working procedure of the present invention is physical process, and working medium is substantially not affected by environment, so working environment is unrestricted, can expand the using scope of sensor, improves using effect.
The present invention can further be specially:
The cross-section area ratio of large piston and small piston is greater than 3.
In order to guarantee the amplification effect of energy in hydraulic pressure installation, magnification ratio, the cross-section area ratio of large piston and small piston should be greater than 3, and optimal selection should be greater than 5-10 doubly.
Piezoelectric device is made by piezoelectric material, and its effect surface fixedly mounts near power-converting device.
That is to say, piezoelectric device is fixed on power-converting device towards the one side of large piston, and the electric charge that effect surface produces can be directly delivered to power-converting device and process.
Piezoelectric material can adopt PZT piezoelectric constant pad, and area equates with large piston area.
Power-converting device includes rectifying device and the regulator of electrical connection, and rectifying device connects piezoelectric device, the external working electrode of regulator.
Piezoelectric device, because piezoelectric effect produces after electric charge, forms alternating signal, and rectifying device is processed this alternating signal inlet wire rectification, forms direct current, and regulator, for formed direct current is adjusted into work electric energy, is then supplied with external loading and used.
Shake unit can be a kind of spring component.
The resonant frequency that the material of spring and structure draw according to the environment frequency computation part specifically recording determines, like this, except the large vibration source of energy, can also receive the vibration source of low frequency.Shake unit
In sum, the invention provides a kind of piezoelectric micro-vibration enegrgy converter based on hydraulic principle, can collect the energy of surrounding enviroment, comprise that solar energy, heat energy, mechanical energy etc. can produce the energy source of vibration frequency, utilize hydraulic principle, after being amplified, vibration force in environment is applied on piezoelectric device, utilize the piezoelectric effect of piezoelectric device to produce electric energy, for sensor or other low power consumption load supplyings, because this technology is based on micro-energy that shakes, so service time is long, is not used capacity limit, almost, without replacing, there is no environmental pollution problem; In addition, transformation of energy working procedure of the present invention is physical process, and working medium is substantially not affected by environment, so working environment is unrestricted, can expand the using scope of sensor, improves using effect.
Accompanying drawing explanation
Figure 1 shows that the structural representation of the piezoelectric micro-vibration enegrgy converter based on hydraulic principle of the present invention.
Below in conjunction with embodiment, the present invention is described further.
Specific embodiment
Most preferred embodiment:
With reference to accompanying drawing 1, a kind of piezoelectric micro-vibration enegrgy converter based on hydraulic principle, include T-shaped housing, hydraulic pressure installation, piezoelectric device and power-converting device, T-shaped housing includes larger cross-section portion and small cross sections portion, hydraulic pressure installation includes shake unit, small piston, hydraulic oil, oil hydraulic cylinder and large piston, oil hydraulic cylinder is positioned at the handing-over position of T-shaped housing inner chamber larger cross-section portion and small cross sections portion, near T-shaped housing madial wall, install, oil hydraulic cylinder is positioned at housing inner chamber small cross sections portion one side small piston is installed, be positioned at larger cross-section portion one side large piston is installed, greatly, in cylinder chamber between small piston, be full of hydraulic oil, shake unit is that a kind of natural frequency of vibration is the spring component of 100HZ, one end is connected with small piston outer side surface, large piston is connected with power-converting device by piezoelectric device.
The present invention provides a concrete used parameter: oil hydraulic cylinder is upper coarse and lower fine, height overall 20mm, and the thick cylinder height * external diameter=8 * 11mm in top, the thin cylinder height * external diameter=12 * 5mm in bottom, hydraulic cylinder wall thickness is 1mm.Described large piston is thick * diameter=3 * 9mm, and small piston is thick * diameter=2 * 3mm.
Wherein piezoelectric device is made by a kind of piezoelectric material of PZT piezoelectric constant pad, and area equates with large piston area, and thickness is 2mm.Power-converting device includes rectifying device and the regulator of electrical connection, and rectifying device connects piezoelectric device, the external working electrode of regulator.
Its working principle is:
The micro-center of percussion of the low frequency of spring component in environment resonates, gather thus the vibrational energy of environment, and pass to small piston, then pass to hydraulic oil by small piston, because the oil hydraulic cylinder at hydraulic oil place converts to large-section via small bore, in same pressure situation, pressure is exaggerated, according to hydraulic principle, magnification factor equals the cross-section area ratio of large and small piston, in the scope that can accept at transducer, ratio is larger, and amplification effect is better.Large piston is received the vibration force of the amplification of being transmitted by hydraulic oil, directly push piezoelectric device, according to piezoelectric effect principle, this piezoelectric device surface produces electric charge, this electric charge is direct current via the first rectification of rectifying device of power-converting device, by regulator, adjust output voltage again, finally the direct current of output is supplied with to final load by working electrode and use.
It is same as the prior art that the present invention does not state part.
Claims (5)
1. the piezoelectric micro-vibration enegrgy converter based on hydraulic principle, it is characterized in that, include T-shaped housing, hydraulic pressure installation, piezoelectric device and power-converting device, T-shaped housing includes larger cross-section portion and small cross sections portion, hydraulic pressure installation includes shake unit, small piston, hydraulic oil, oil hydraulic cylinder and large piston, oil hydraulic cylinder is positioned at the handing-over position of T-shaped housing inner chamber larger cross-section portion and small cross sections portion, in cylinder, be full of hydraulic oil, oil hydraulic cylinder is positioned at housing inner chamber small cross sections portion one side small piston is installed, be positioned at larger cross-section portion one side large piston is installed, shake unit one end is connected with small piston outer side surface, large piston is connected with power-converting device by piezoelectric device,
Described shake unit is a kind of spring component, it is the shake unit that exists maximum frequencies to be close in a kind of natural frequency of vibration and Environmental Conditions, the micro-center of percussion of the low frequency of this spring component in environment resonates, and gathers thus the vibrational energy of environment, and passes to small piston.
2. a kind of piezoelectric micro-vibration enegrgy converter based on hydraulic principle according to claim 1, is characterized in that, the cross-section area ratio of large piston and small piston is greater than 3.
3. a kind of piezoelectric micro-vibration enegrgy converter based on hydraulic principle according to claim 1, is characterized in that, piezoelectric device is made by piezoelectric material, and its effect surface fixedly mounts near power-converting device.
4. a kind of piezoelectric micro-vibration enegrgy converter based on hydraulic principle according to claim 2, is characterized in that, piezoelectric material adopts PZT piezoelectric constant pad, and area equates with large piston area.
5. a kind of piezoelectric micro-vibration enegrgy converter based on hydraulic principle according to claim 1, is characterized in that, power-converting device includes rectifying device and the regulator of electrical connection, and rectifying device connects piezoelectric device, the external working electrode of regulator.
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| CN201010595019.7A CN102080638B (en) | 2010-12-20 | 2010-12-20 | Hydraulic principle-based piezoelectric microvibration energy converter |
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| CN201010595019.7A CN102080638B (en) | 2010-12-20 | 2010-12-20 | Hydraulic principle-based piezoelectric microvibration energy converter |
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| CN102080638B true CN102080638B (en) | 2014-03-26 |
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| CN103016434A (en) * | 2012-12-20 | 2013-04-03 | 北京航空航天大学 | Piezoelectric ceramic direct-driving servo valve based on hydraulic micro-displacement amplification structure |
| CN103433178A (en) * | 2013-09-04 | 2013-12-11 | 吉林大学 | Piezoelectric-hydraulic control type dispensing device |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1610210A (en) * | 2004-11-22 | 2005-04-27 | 西安交通大学 | Rolling stock rail vibration energy piezoelectric power generating method and system thereof |
| CN1610209A (en) * | 2004-11-22 | 2005-04-27 | 西安交通大学 | Rail vehicle vibrating energy piezoelectric power generating method and system thereof |
| CN201943906U (en) * | 2010-12-20 | 2011-08-24 | 福建水口发电集团有限公司 | Piezoelectric micro-vibration energy converter based on hydraulic principles |
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- 2010-12-20 CN CN201010595019.7A patent/CN102080638B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1610210A (en) * | 2004-11-22 | 2005-04-27 | 西安交通大学 | Rolling stock rail vibration energy piezoelectric power generating method and system thereof |
| CN1610209A (en) * | 2004-11-22 | 2005-04-27 | 西安交通大学 | Rail vehicle vibrating energy piezoelectric power generating method and system thereof |
| CN201943906U (en) * | 2010-12-20 | 2011-08-24 | 福建水口发电集团有限公司 | Piezoelectric micro-vibration energy converter based on hydraulic principles |
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