CN202503456U - Piezoelectricity-magnetoelectricity mixing energy harvesting device - Google Patents

Piezoelectricity-magnetoelectricity mixing energy harvesting device Download PDF

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Publication number
CN202503456U
CN202503456U CN2012201117729U CN201220111772U CN202503456U CN 202503456 U CN202503456 U CN 202503456U CN 2012201117729 U CN2012201117729 U CN 2012201117729U CN 201220111772 U CN201220111772 U CN 201220111772U CN 202503456 U CN202503456 U CN 202503456U
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China
Prior art keywords
energy
piezoelectricity
collection unit
cantilever
permanent magnet
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CN2012201117729U
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Chinese (zh)
Inventor
黄学良
桑英军
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东南大学
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Priority to CN2012201117729U priority Critical patent/CN202503456U/en
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Publication of CN202503456U publication Critical patent/CN202503456U/en

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    • Y02B60/50

Abstract

The utility model, which belongs to the microsource energy-saving technology field, discloses a piezoelectricity-magnetoelectricity mixing energy harvesting device. The device comprises an energy harvesting module, a rectification circuit, an energy storage voltage regulation circuit and a load. The energy harvesting module includes a plurality of energy harvesting units, wherein the energy harvesting units consist of fixed pedestals (1), fixed supports (2), cantilever beams (3), piezoelectric patches (4), permanent magnets (5), coils (6) and leads (7); all the energy harvesting units have a same structure and the lengths of the cantilever beams are different. N poles and S poles of permanent magnets of adjacent units are oppositely placed. According to the utility model, the provided piezoelectricity-magnetoelectricity mixing energy harvesting device, which has characteristics of simple structure, convenient installation, high energy harvesting efficiency, and wide working frequency band, can be applied to a power supply apparatus of a wireless sensor network.

Description

Piezoelectricity-magnetoelectricity mixed tensor gathering-device
Technical field
The utility model relates to a kind of piezoelectricity-magnetoelectricity mixed tensor gathering-device, belongs to little power supply field of energy-saving technology.
Background technology
Energy collecting device is mainly used in clean energy resource, little power technique fields; Be to be the miniature power generating device of electric energy capable of using with the power conversion of disperseing in the environment; Usually cooperate super capacitor or rechargeable battery and energy management circuit to use; The environmental energy of collecting is stored, realize power supply simultaneously load.Low-power consumption products such as microelectronics, wireless network and MEMS have obtained greatly developing; Lower powered embedded electronic device will become the some in our daily life; If do not use expensive traditional wired power supply, how will become key of problem to thousands of transducer power supply in the intensive network.And the conventional batteries cost is high, need periodic replacement and be prone to cause environmental pollution, and because the service position of some micro element is difficult to touch, the battery altering very inconvenience that becomes even maybe.In addition, many energy or inflammable and explosive when waiting hazardous area can not be provided, the battery altering problem is difficult to solution especially.Therefore, how, sensor node becomes at present the focus of research both at home and abroad for providing stable, lasting, reliable, cleaning, cheap energy.Available variety of energy sources is a lot of in the environment, and like solar energy, wind energy, heat energy, vibration mechanical energy or the like, wherein vibrational energy is ubiquitous; Like automobile vibration, motion oscillations, millwork vibration or the like; Vibrational energy is collected can be divided into piezoelectric type, electrostatic, magneto-electric or the like; Wherein piezoelectric type and magneto-electric collection of energy mode can combine well, improve efficiency of energy collection.
The utility model content
It is a kind of simple in structure, reliable that the utility model provides, and can significantly improve efficiency of energy collection and have the piezoelectricity-magnetoelectricity mixed tensor gathering-device of broad working band.
The utility model adopts following technical scheme for solving its technical problem:
A kind of piezoelectricity-magnetoelectricity mixed tensor gathering-device; Being linked in sequence by collection of energy module, rectification circuit, energy storage regulating circuit and load forms, and the collection of energy module comprises a plurality of energy collection unit, and wherein energy collection unit comprises firm banking, hold-down support, cantilever beam, piezoelectric patches, permanent magnet, coil and lead-in wire; Firm banking is provided with hold-down support; Cantilever beam through being fixedly connected is housed on the hold-down support, and the upper and lower surfaces of cantilever beam is with piezoelectric patches, and the unsettled end dress of cantilever beam attaches horizontal permanent magnet; The permanent magnet two ends are placed with two series coils on the firm banking on the lower side, and coil is connected lead-in wire with piezoelectric patches.
Described energy collection unit structure is identical, and the cantilever beam of energy collection unit is parallel to each other, but the cantilever beam length in each energy collection unit is different.
The polarised direction of permanent magnet is a length direction in the described energy collection unit, and permanent magnet N, the S utmost point of adjacent energy collector unit are placed in opposite directions.
Described energy collection unit collection of energy mode is a piezoelectricity magnetoelectricity hybrid mode.
Coil is arranged on the firm banking in the described energy collection unit, and coil plane is perpendicular to firm banking, and parallel with surface, permanent magnet the two poles of the earth, coil-span is a bit larger tham the length of permanent magnet.
Piezoelectric patches pastes on the substrate through conducting resinl in the described energy collection unit; Substrate is an electric conducting material; Piezoelectric patches respectively has a slice up and down, and the upper and lower surfaces of piezoelectric patches connects the utmost point of a lead-in wire as output voltage terminal up and down, and another utmost point lead-in wire is drawn by Intermediate substrate.
The beneficial effect of the utility model is following:
1, simple in structure, easy for installation, efficiency of energy collection is high, and working band is wide.
2, alternative chemical cell or combined charge battery use, and need not change battery and frequent maintenance; Non-environmental-pollution belongs to the high-efficiency cleaning power supply.
3, realize rectification, energy storage and voltage regulation function, satisfied the needs of current wireless sensor network development.
Description of drawings
Fig. 1 is piezoelectricity-magnetoelectricity mixed tensor gathering-device structural representation.
Fig. 2 is the structural representation of energy collection unit, wherein: 1, firm banking; 2, hold-down support; 3 cantilever beams; 4, piezoelectric patches; 5, permanent magnet; 6, coil; 7, lead-in wire.
Fig. 3 is the placement sketch map of a plurality of energy collection unit in the collection of energy module.
Embodiment
Below in conjunction with accompanying drawing innovation and creation are explained further details.
Piezoelectricity as shown in Figure 1-magnetoelectricity mixed tensor gathering-device, being linked in sequence by collection of energy module, rectification circuit, energy storage regulating circuit and load forms.The collection of energy module comprises that a plurality of cantilever beams 3 are uneven in length the energy collection unit that cantilever beam 3 is parallel to each other.
The concrete structure of energy collection unit is as shown in Figure 2; Comprise firm banking 1 and be arranged on the hold-down support 2 on the firm banking 1; Cantilever beam 3 through being fixedly connected is housed on the hold-down support 2, and the upper and lower surfaces of cantilever beam 3 is with piezoelectric patches 4, and the unsettled end dress of cantilever beam attaches the cuboid permanent magnet 5 of horizontal placement; Permanent magnet 5 two ends are placed with two series coils 6 on the firm banking 1 on the lower side, and coil 6 is connected lead-in wire 7 with piezoelectric patches 4.The structure of each energy collection unit is identical, and the length of cantilever beam 3 is different.The cantilever beam of energy collection unit is parallel to each other, and permanent magnet N, the S utmost point of adjacent cells are placed in opposite directions.
Vibrate the vibration that causes this device by external environment condition, cantilever beam drives the permanent magnet up-down vibration, and the relative motion of coil and magnet causes taking place clocklike to change through the magnetic flux of coil in the vibration processes; Thereby in coil, produce induced electromotive force, the permanent magnet N of adjacent energy collector unit, the S utmost point place in opposite directions and can effectively strengthen magnetic field; Increase output voltage, vibration simultaneously makes cantilever beam 3 flexural deformations, piezoelectric patches 4 pressurizeds; Piezoelectric patches 4 upper and lower surfaces gather a large amount of electric charges, produce correspondent voltage.When the vibration source vibration mode is sine wave; Induced electromotive force and piezoelectric patches voltage also are sinusoidal rules; The size that produces induced electromotive force and piezoelectric patches voltage is relevant with device self structure characteristic, and each energy collection unit reaches maximum output valve when natural frequency, most effective.This frequency promptly is the optimum working frequency of single energy collection unit, and this device adopts a plurality of energy collection unit, has a plurality of cantilever beams, and cantilever beam length has nothing in common with each other as shown in Figure 3.The central task frequency of installing each energy collection unit is different, but frequency band overlaps each other, and total frequency band is widened, and the operating frequency range of adaptation is wider.Rectification circuit and energy storage regulating circuit carry out necessary electric energy conversion back to electric to the output of collection of energy module.
It is thus clear that; The utility model possesses simple in structure, and is easy for installation, and efficiency of energy collection is high; The advantage of bandwidth; Realize rectification, energy storage and voltage regulation function simultaneously, alternative chemical cell or combining super capacitor and rechargeable battery use, and make device satisfy the self-energizing demand of wireless sensor network node.

Claims (6)

1. piezoelectricity-magnetoelectricity mixed tensor gathering-device; It is characterized in that being linked in sequence and form by collection of energy module, rectification circuit, energy storage regulating circuit and load; The collection of energy module comprises a plurality of energy collection unit; Wherein energy collection unit comprises firm banking (1), hold-down support (2), cantilever beam (3), piezoelectric patches (4), permanent magnet (5), coil (6) and lead-in wire (7), and firm banking (1) is provided with hold-down support (2), and the cantilever beam (3) through being fixedly connected is housed on the hold-down support (2); The upper and lower surfaces of cantilever beam (3) is with piezoelectric patches (4); The unsettled end dress of cantilever beam attaches horizontal permanent magnet (5), and permanent magnet (5) two ends are placed with two series coils (6) on the firm banking (1) on the lower side, and coil (6) is connected lead-in wire (7) with piezoelectric patches (4).
2. piezoelectricity according to claim 1-magnetoelectricity mixed tensor gathering-device; It is characterized in that described energy collection unit structure is identical; The cantilever beam of energy collection unit (3) is parallel to each other, but the cantilever beam in each energy collection unit (3) length is different.
3. piezoelectricity according to claim 1-magnetoelectricity mixed tensor gathering-device, the polarised direction that it is characterized in that permanent magnet in the described energy collection unit (5) is a length direction, the permanent magnet of adjacent energy collector unit (5) N, the S utmost point are placed in opposite directions.
4. piezoelectricity according to claim 1-magnetoelectricity mixed tensor gathering-device is characterized in that described energy collection unit collection of energy mode is a piezoelectricity magnetoelectricity hybrid mode.
5. piezoelectricity according to claim 1-magnetoelectricity mixed tensor gathering-device; It is characterized in that coil in the described energy collection unit (6) is arranged on the firm banking (1); Coil (6) plane is perpendicular to firm banking (1); The length parallel with permanent magnet (5) surface, the two poles of the earth, that coil (6) spacing is a bit larger tham permanent magnet (5).
6. piezoelectricity according to claim 1-magnetoelectricity mixed tensor gathering-device; It is characterized in that piezoelectric patches in the described energy collection unit (4) pastes on the substrate through conducting resinl; Substrate is an electric conducting material; Piezoelectric patches (4) respectively has a slice up and down, and the upper and lower surfaces of piezoelectric patches (4) connects the utmost point of a lead-in wire (7) as output voltage terminal up and down, and another utmost point lead-in wire (7) is drawn by Intermediate substrate.
CN2012201117729U 2012-03-23 2012-03-23 Piezoelectricity-magnetoelectricity mixing energy harvesting device CN202503456U (en)

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Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102611351A (en) * 2012-03-23 2012-07-25 东南大学 Piezoelectricity-magnetic electricity mixed energy collection device
CN103174616A (en) * 2013-03-12 2013-06-26 张平 Tumbler type multimode power generating device
CN103795149A (en) * 2014-03-04 2014-05-14 镇江博联电子科技有限公司 Energy accumulation method and device based on piezoelectric materials for wearable electronic product
CN103787261A (en) * 2014-02-12 2014-05-14 东南大学 Integrated multi-channel energy harvesting micromechanical structure
CN103840707A (en) * 2014-02-20 2014-06-04 东南大学 Cantilever beam vibration and electromagnetism self-powered microsensor of Internet-of-things radio frequency transceiving assembly
CN104836478A (en) * 2015-05-19 2015-08-12 北京理工大学 Piezoelectric-electromagnetic composite low-frequency broadband energy harvester
CN105099272A (en) * 2015-10-08 2015-11-25 北京理工大学 Energy acquisition circuit used for piezoelectric-electromagnetic combined type energy harvesting device
CN106849596A (en) * 2017-04-06 2017-06-13 中国人民解放军后勤工程学院 A kind of energy composite energy collection type human body power TRT based on single pendulum and piezo-electric effect
CN107508495A (en) * 2017-08-28 2017-12-22 北京工业大学 A kind of piezoelectricity electromagnetic vibration power generation device
CN108183626A (en) * 2018-01-08 2018-06-19 中北大学 Power generation screw based on magnetoelectricity-Piezoelectric anisotropy formula structure
CN109283403A (en) * 2018-11-13 2019-01-29 东南大学 Thin-film material transverse direction piezoelectric modulus test model and method based on multilayer cantilever beam

Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102611351A (en) * 2012-03-23 2012-07-25 东南大学 Piezoelectricity-magnetic electricity mixed energy collection device
CN103174616A (en) * 2013-03-12 2013-06-26 张平 Tumbler type multimode power generating device
CN103787261B (en) * 2014-02-12 2016-02-03 东南大学 A kind of integrated form multiple tracks collection of energy micro mechanical structure
CN103787261A (en) * 2014-02-12 2014-05-14 东南大学 Integrated multi-channel energy harvesting micromechanical structure
CN103840707A (en) * 2014-02-20 2014-06-04 东南大学 Cantilever beam vibration and electromagnetism self-powered microsensor of Internet-of-things radio frequency transceiving assembly
CN103795149A (en) * 2014-03-04 2014-05-14 镇江博联电子科技有限公司 Energy accumulation method and device based on piezoelectric materials for wearable electronic product
CN103795149B (en) * 2014-03-04 2016-11-02 镇江博联电子科技有限公司 Energy storage method based on piezoelectric and device for Wearable electronic product
CN104836478A (en) * 2015-05-19 2015-08-12 北京理工大学 Piezoelectric-electromagnetic composite low-frequency broadband energy harvester
CN104836478B (en) * 2015-05-19 2017-06-20 北京理工大学 A kind of piezoelectricity electromagnetism combined type broad band low frequency energy accumulator
CN105099272A (en) * 2015-10-08 2015-11-25 北京理工大学 Energy acquisition circuit used for piezoelectric-electromagnetic combined type energy harvesting device
CN105099272B (en) * 2015-10-08 2018-05-15 北京理工大学 A kind of energy acquisition circuit for piezoelectric-electrcombinedc combinedc energy accumulator
CN106849596A (en) * 2017-04-06 2017-06-13 中国人民解放军后勤工程学院 A kind of energy composite energy collection type human body power TRT based on single pendulum and piezo-electric effect
CN107508495A (en) * 2017-08-28 2017-12-22 北京工业大学 A kind of piezoelectricity electromagnetic vibration power generation device
CN108183626A (en) * 2018-01-08 2018-06-19 中北大学 Power generation screw based on magnetoelectricity-Piezoelectric anisotropy formula structure
CN108183626B (en) * 2018-01-08 2019-04-30 中北大学 Based on magnetoelectricity-Piezoelectric anisotropy formula structure power generation screw
CN109283403A (en) * 2018-11-13 2019-01-29 东南大学 Thin-film material transverse direction piezoelectric modulus test model and method based on multilayer cantilever beam

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