CN107592031B - Non-linear broadband piezoelectric energy harvesting device towards tire pressure monitoring sensor energy supply - Google Patents
Non-linear broadband piezoelectric energy harvesting device towards tire pressure monitoring sensor energy supply Download PDFInfo
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- CN107592031B CN107592031B CN201711040606.8A CN201711040606A CN107592031B CN 107592031 B CN107592031 B CN 107592031B CN 201711040606 A CN201711040606 A CN 201711040606A CN 107592031 B CN107592031 B CN 107592031B
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Abstract
The invention discloses a kind of non-linear broadband piezoelectric energy harvesting devices towards tire pressure monitoring sensor energy supply, and to solve to be currently used in, service life existing for the piezoelectric generating device of tyre pressure sensor energy supply is short, capturees the problems such as energy frequency band width.The present invention includes outer housing, rotary components, piezo-electric generating component three parts.Rotary components and piezo-electric generating component are fixed on inside outer housing.The rotary components can convert the rotation of itself for wheel, and sector electromagnet is driven to be rotated together, and the sector electromagnet of rotation stirs the magnet of piezo-electric generating element end, so that piezoelectric element generates deformation, and then realize the capture of energy.The piezoelectric generating device that the present invention designs be utilized the non-linear rigidity effect that non-linear force generates between magnet widened prisoner can bandwidth, replace mechanical shock to improve the service life of piezoelectric element using non-contact magnetic force.It is with a wide range of applications in automobile and technical field of energy utilization.
Description
Technical field
The present invention relates to it is a kind of towards tire pressure monitoring sensor energy supply non-linear broadband piezoelectric energy harvesting device, belong to automobile and
Technical field of energy source collection.
Background technique
With the development of highway and the continuous improvement of automotive performance, the travel speed of automobile is getting faster, especially automobile
Owning amount increases sharply, and traffic is more and more crowded, and accident is more frequent, and the safety of automobile just becomes particularly important.Automobile
Tire pressure is abnormal, is easy to lead to the generation of contingency.In pernicious traffic accident, the traffic accident institute accounting caused by blowing out
Example is very high, and tire pressure deficiency is the one of the major reasons for causing to blow out, and thus illustrates the importance of tire pressure monitoring system.When
It is preceding for tyre pressure sensor energy-provision way be mainly chemical cell power supply, there are batteries to have for chemical cell power supply mode
Limit need to regularly replace and the deficiencies of environmental pollution.
The direct piezoelectric effect capture micro- energy conversion of environment using piezoelectric element is the energy collection technology of electric energy, due to tool
There are energy conversion efficiency height, cleanliness without any pollution, not by advantages such as electromagnetic interferences, becomes the research of micro- energy conversion Yu supply technology
Hot spot.In the process of moving, vehicle wheel rotation has vibration frequency amplitude of variation when energy itself is big, revolving speed is high and work to automobile
The features such as larger.Therefore, rationally using the energy of wheel rotation, in conjunction with the direct piezoelectric effect energy that rotates wheel of piezoelectric element
Amount is converted into electric energy as tyre pressure sensor energy supply, can effectively solve conventional power source energy-provision way bring wiring complexity and battery supplies
Energy mode bring needs the problems such as periodic replacement, pollution environment.However, current application is in Tire Pressure Monitor System field
The problems such as generally existing prisoner's energy frequency band of piezoelectric generating device is narrow, service life is short, limits piezoelectric generating device in automobile and energy
The development and application in source technology field.Therefore, it is necessary to study a kind of new energy supply for tire pressure monitoring sensor energy supply
Technology come solve the problems, such as presently, there are.
Summary of the invention
There is the problems such as prisoner's energy frequency band is narrow, service life is short, the present invention to solve existing tyre pressure sensor power supply device
A kind of non-linear broadband piezoelectric energy harvesting device towards tire pressure monitoring sensor energy supply is disclosed, is the sensor in tire pressure monitoring system
A kind of novel environment friendly, efficient, stable power supply device are provided.
The technical scheme adopted by the invention is that:
The non-linear broadband piezoelectric energy harvesting device towards tire pressure monitoring sensor energy supply is by outer housing, rotary components, pressure
Electric electrification component composition.The rotary components are fixed in outer housing, the peace on piezo-electric generating component and outer housing inner wall
Tankage one cooperates, and is fixed by adhesive means.
The outer housing is made of encapsulating shell, side cover and holding screw, and encapsulating shell and side cover cooperation are pacified by holding screw
Dress is fixed；The encapsulating shell bottom centre position is provided with bearing mounting hole one, is interference fitted with bearing, realizes the peace of bearing
Dress is fixed, and four side inner walls of the encapsulating shell are symmetrically arranged with mounting groove one close to medium position, match with piezo-electric generating component
It closes, is fixed by bonding way, encapsulating shell end face quadrangle has been evenly arranged threaded hole, carries out screw thread company with holding screw
It connects；The side cover is provided with bearing mounting hole two and through-hole one, and the bearing mounting hole two is interference fitted with bearing, realizes bearing
Installation fix, the through-hole one is evenly arranged in the position of side cover upper surface quadrangle, with threaded hole cooperate, pass through clamp screw
Nail installation is fixed.
The rotary components are made of bearing, rotary shaft, fastening screw, sector electromagnet, clamping device, substrate, axis
It holds and is arranged symmetrically in rotary components two sides, be cooperatively connected with rotary shaft, sector electromagnet is adhesively fixed on the rotary shaft, clamping device
Cooperate with rotary shaft, be arranged in the intermediate position of rotary shaft, substrate and clamping device cooperate, and carry out screw thread company by fastening screw
Connect fixation.
The bearing is arranged symmetrically in rotary components two sides, cooperates with positioning shaft shoulder, limits the axial fortune of rotary components
It is dynamic；The rotary shaft is provided with positioning shaft shoulder, installation annular groove and mounting groove two, the positioning shaft shoulder and is arranged symmetrically in rotary shaft two
Side is connect with bearing fit, and for the axial displacement of limited bearing, the installation annular groove is symmetrically distributed in rotary shaft two sides,
It is cooperatively connected with sector electromagnet by gluing, and installation annular groove is provided with M, and M is the integer more than or equal to 1, the content of present invention
The value of middle M is 3, and the middle part of rotary shaft is arranged in the mounting groove two, is cooperatively connected with the special-shaped through-hole of clamping device；Institute
It states sector electromagnet to be symmetrically distributed in installation annular groove, sector electromagnet is equipped with and amplexiforms face, cooperates with the outer profile of installation annular groove, leads to
Gluing is crossed to be connected and fixed；The clamping device is equipped with special-shaped through-hole, cooperates with mounting groove two, is arranged in the middle part of rotary shaft, institute
The side end face for stating clamping device is equipped with through-hole two, is cooperatively connected with fastening screw, another side of the clamping device
Face is equipped with installation threaded hole, is threadedly coupled with fastening screw, realizes the fixed installation of substrate and clamping device；The substrate
It is provided with through-hole three and mass block, the through-hole three is arranged in one side end of substrate, with the through-hole two and peace on clamping device
Threaded hole cooperation is filled, is installed and is fixed by fastening screw, the mass block is bonded in the free end of substrate.
The piezo-electric generating component is made of rectangular magnet, piezoelectric substrate and piezoelectric element, and the rectangular magnet is bonded in
The cantilever beam end of piezoelectric substrate, the mounting groove two in the fixing end and outer housing of the piezoelectric substrate are fixed by gluing, are pressed
Electric substrate is provided with N cantilever beam, and N is the integer more than or equal to 1, and the value of N is 3 in the content of present invention, the piezoelectric element
It is bonded in the two sides of cantilever beam；Sector electromagnet in rectangular magnet and rotary components interacts, and piezo-electric generating component occurs
Vibration, piezoelectric element generate deformation, and the conversion of electric energy is realized based on direct piezoelectric effect.
The beneficial effects of the present invention are: the present invention is based on the direct piezoelectric effect of piezoelectric material, in the excitation of non-linear magnetic force
Under, the non-linear force being utilized between magnet produces non-linear rigidity effect, can widen the energy capture frequency of piezoelectric element
Bandwidth.Since the non-contact characteristic of active force between magnet being utilized in the present invention, the degree of wear of device can be substantially reduced, is had
Increase the service life of device to effect.The configuration of the present invention is simple, novelty, high reliablity, it is environment friendly and pollution-free in power generation process,
The low-power consumption sensors such as tire pressure monitoring sensor energy supply etc. is with a wide range of applications.
Detailed description of the invention
Fig. 1 show the non-linear broadband piezoelectric energy harvesting device structure proposed by the present invention towards tire pressure monitoring sensor energy supply
Schematic diagram；
Fig. 2 show the non-linear broadband piezoelectric energy harvesting device shell proposed by the present invention towards tire pressure monitoring sensor energy supply
Body structural schematic diagram；
Fig. 3 show the non-linear broadband piezoelectric energy harvesting device encapsulation proposed by the present invention towards tire pressure monitoring sensor energy supply
Shell structure schematic diagram；
Fig. 4 show the non-linear broadband piezoelectric energy harvesting device side cover proposed by the present invention towards tire pressure monitoring sensor energy supply
Structural schematic diagram；
Fig. 5 show the non-linear broadband piezoelectric energy harvesting device rotation proposed by the present invention towards tire pressure monitoring sensor energy supply
Component structure diagram；
Fig. 6 show the non-linear broadband piezoelectric energy harvesting device rotation proposed by the present invention towards tire pressure monitoring sensor energy supply
Axle construction schematic diagram；
It is fan-shaped that Fig. 7 show the non-linear broadband piezoelectric energy harvesting device proposed by the present invention towards tire pressure monitoring sensor energy supply
Magnet arrangement schematic diagram；
Fig. 8 show the non-linear broadband piezoelectric energy harvesting device proposed by the present invention towards tire pressure monitoring sensor energy supply and clamps
Apparatus structure schematic diagram；
Fig. 9 show the non-linear broadband piezoelectric energy harvesting device substrate proposed by the present invention towards tire pressure monitoring sensor energy supply
Structural schematic diagram；
Figure 10 show the non-linear broadband piezoelectric energy harvesting device pressure proposed by the present invention towards tire pressure monitoring sensor energy supply
Electric electrification component structural schematic diagram.
Specific embodiment:
Illustrate present embodiment in conjunction with Fig. 1 ~ Figure 10.
A kind of tool for non-linear broadband piezoelectric energy harvesting device towards tire pressure monitoring sensor energy supply that present embodiment provides
Body embodiment.The non-linear broadband piezoelectric energy harvesting device towards tire pressure monitoring sensor energy supply includes outer housing 1, rotation group
3 three parts of part 2 and piezo-electric generating component.The rotary components 2 are fixed in outer housing 1, piezo-electric generating component 3 and shell
One 1-1-2 of mounting groove cooperation on 1 inner wall of body, is fixed by adhesive means.
The outer housing 1 is made of encapsulating shell 1-1, side cover 1-2 and holding screw 1-3, and encapsulating shell 1-1 and side cover 1-2 match
It closes, is installed and fixed by holding screw 1-3；The encapsulating shell 1-1 bottom centre position is provided with one 1-1-1 of bearing mounting hole,
It is interference fitted with bearing 2-1, realizes that the installation of bearing 2-1 is fixed, tetra- side inner walls of the encapsulating shell 1-1 are close to middle position
It sets and is symmetrically arranged with one 1-1-2 of mounting groove, cooperate with piezo-electric generating component 3, fixed by bonding way, the encapsulating shell 1-1
End face quadrangle has been evenly arranged threaded hole 1-1-3, is threadedly coupled with holding screw 1-3；The side cover 1-2 is provided with axis
One 1-2-2 of two 1-2-1 of mounting hole and through-hole, two 1-2-1 of bearing mounting hole and bearing 2-1 interference fit are held, realizes bearing
The installation of 2-1 is fixed, and one 1-2-2 of through-hole is evenly arranged in the position of the upper surface side cover 1-2 quadrangle, with threaded hole 1-1-
3 cooperations, are installed by holding screw 1-3 and are fixed.
The rotary components 2 by bearing 2-1, rotary shaft 2-2, fastening screw 2-3, sector electromagnet 2-4, clamping device 2-5,
Substrate 2-6 composition, middle (center) bearing 2-1 are arranged symmetrically in 2 two sides of rotary components, are cooperatively connected with rotary shaft 2-2, sector electromagnet 2-
4 are adhesively fixed on rotary shaft 2-2, and clamping device 2-5 and rotary shaft 2-2 cooperate, and are arranged in the intermediate position of rotary shaft 2-2,
Substrate 2-6 and clamping device 2-5 cooperates, and carries out threaded connection fixation by fastening screw 2-3.
The bearing 2-1 is arranged symmetrically in 2 two sides of rotary components, cooperates with positioning shaft shoulder 2-2-1, limits rotary components
2 axial movement；The rotary shaft 2-2 is provided with positioning shaft shoulder 2-2-1, installation annular groove 2-2-2 and two 2-2-3 of mounting groove, institute
It states positioning shaft shoulder 2-2-1 and is arranged symmetrically in the two sides rotary shaft 2-2, be cooperatively connected with bearing 2-1, for limited bearing 2-1's
Axial displacement, the installation annular groove 2-2-2 are symmetrically distributed in the two sides rotary shaft 2-2, are cooperated with sector electromagnet 2-4 by gluing
Connection, installation annular groove 2-2-2 are provided with M, and M is the integer more than or equal to 1, and the value of M is 3 in present embodiment, institute
The middle part that rotary shaft 2-2 is arranged in two 2-2-3 of mounting groove is stated, is cooperatively connected with the special-shaped through-hole 2-5-1 of clamping device 2-5；
The sector electromagnet 2-4 is symmetrically distributed in installation annular groove 2-2-2, and sector electromagnet 2-4 is equipped with and amplexiforms face 2-4-1, with installation
The outer profile of annular groove 2-2-2 cooperates, and is connected by glue fixation；The clamping device 2-5 is equipped with special-shaped through-hole 2-5-1, with
Two 2-2-3 of mounting groove cooperation, is arranged in the middle part of rotary shaft 2-2, and a side end face of the clamping device 2-5 is equipped with two 2- of through-hole
5-2 is cooperatively connected with fastening screw 2-3, and another side end face of the clamping device 2-5 is equipped with installation threaded hole 2-5-3,
It is threadedly coupled with fastening screw 2-3, realizes the fixed installation of substrate 2-6 and clamping device 2-5；The substrate 2-6 is provided with
Three 2-6-1 of through-hole and mass block 2-6-2, three 2-6-1 of through-hole is arranged in mono- side end substrate 2-6, with clamping device 2-5
On two 2-5-2 of through-hole and installation threaded hole 2-5-3 cooperation, pass through fastening screw 2-3 installation fix, the mass block 2-6-2
It is bonded in the free end of substrate 2-6.
The piezo-electric generating component 3 is made of rectangular magnet 3-1, piezoelectric substrate 3-2 and piezoelectric element 3-3, the rectangle
Magnet 3-1 is bonded in the end cantilever beam 3-2-1 of piezoelectric substrate 3-2, in the fixing end and outer housing 1 of the piezoelectric substrate 3-2
One 1-1-2 of mounting groove fixed by gluing, piezoelectric substrate 3-2 is provided with N cantilever beam 3-2-1, and N is whole more than or equal to 1
It counts, the value of N is 3 in present embodiment, and the piezoelectric element 3-3 is bonded in the two sides of cantilever beam 3-2-1；Rectangular magnet
Sector electromagnet 2-4 in 3-1 and rotary components 2 interacts, and vibrates piezo-electric generating component 3, and piezoelectric element 3-3 is generated
The conversion of electric energy is realized in deformation based on direct piezoelectric effect.
Working principle: the energy generated when being rotated using wheel is acted in power generator, makes substrate 2-6 and outer housing 1
Between generate relative motion, and then sector electromagnet 2-4 is made to stir rectangular magnet 3-1, so that piezoelectric element 3-3 be excited to generate shape
Become, the deformation of piezoelectric element 3-3 can be such that its surface produces electricl energy.In the motion process of wheel, contactless sector magnet
Relative motion between iron 2-4 and rectangular magnet 3-1 results in the deformation of piezoelectric element 3-3, this contactless opposite fortune
The dynamic active force that rectangular magnet 3-1 can be made constantly to apply alternation to piezoelectric element 3-3, makes it generate deformation repeatedly, this
The non-linear force being utilized between magnet in the process produces non-linear rigidity effect, realizes the effect for widening prisoner's energy bandwidth, and
And the abrasion that the non-contact characteristic of magnetic force greatly reduces device is utilized.It is proposed by the present invention to be energized towards tire pressure monitoring sensor
The power generation process of non-linear broadband piezoelectric energy harvesting device can be divided into two stages: deformation power generating stage and reset power generating stage.Tool
Body power generation process is as follows: deformation power generating stage, close to each other between sector electromagnet 2-4 and rectangular magnet 3-1 to send out piezoelectric element
Raw deformation, makes piezoelectric element 3-3 generate forward voltage；Power generating stage is resetted, when between sector electromagnet 2-4 and rectangular magnet 3-1
When being located remotely from each other, piezoelectric element 3-3 is resetted, to there is negative electricity output, when rotary components rotate a circle, the present invention is completed
The power generation process of a cycle.The above-mentioned course of work is repeated, it can be achieved that continuous power generation of the invention.
In summary the content, a kind of non-linear wideband pressure towards tire pressure monitoring sensor energy supply that the present invention designs
Electric energy accumulator, the direct piezoelectric effect based on piezoelectric material realize the conversion of electric energy.Under the excitation of non-linear magnetic force, magnetic is utilized
Non-linear force between iron produces non-linear rigidity effect, can widen the energy capture frequency bandwidth of piezoelectric element.Due to this
The non-contact characteristic of active force between magnet is utilized in invention, the degree of wear of device can be substantially reduced, effectively increased
The service life of device.It is with a wide range of applications in terms of the low-power consumption sensors such as tire pressure monitoring sensor.
Claims (5)
1. the non-linear broadband piezoelectric energy harvesting device towards tire pressure monitoring sensor energy supply, it is characterised in that described to be supervised towards tire pressure
The non-linear broadband piezoelectric energy harvesting device for surveying sensor energy supply includes outer housing (1), rotary components (2) and piezo-electric generating component (3)
Three parts；The rotary components (2) are fixed in outer housing (1), and piezo-electric generating component (3) is fixed by way of gluing
In mounting groove one (1-1-2)；The outer housing (1) is made of encapsulating shell (1-1), side cover (1-2) and holding screw (1-3),
Encapsulating shell (1-1) and side cover (1-2) are fixed by holding screw (1-3) installation；The rotary components (2) are by bearing (2-1), rotation
Shaft (2-2), fastening screw (2-3), sector electromagnet (2-4), clamping device (2-5), substrate (2-6) composition, the bearing (2-
1) rotary components (2) two sides are arranged symmetrically in；The sector electromagnet (2-4) is adhesively fixed on rotary shaft (2-2), clamping device
(2-5) and rotary shaft (2-2) cooperates, and is fixed on the intermediate position of rotary shaft (2-2), substrate (2-6) passes through fastening screw
(2-3) is fixed on clamping device (2-5)；The piezo-electric generating component (3) is by rectangular magnet (3-1), piezoelectric substrate (3-
2) it is bonded on piezoelectric substrate (3-2) with piezoelectric element (3-3) composition, the rectangular magnet (3-1), the piezoelectric substrate (3-
2) it is fixed in outer housing (1) by adhesive means, the piezoelectric element (3-3) is symmetrically bonded in the two of cantilever beam (3-2-1)
Side.
2. the non-linear broadband piezoelectric energy harvesting device according to claim 1 towards tire pressure monitoring sensor energy supply, feature
It is that the encapsulating shell (1-1) bottom centre position is provided with bearing mounting hole one (1-1-1), four sides of encapsulating shell (1-1)
Inner wall is symmetrically arranged with mounting groove one (1-1-2) close to medium position, and the end face quadrangle encapsulating shell (1-1) has been evenly arranged threaded hole
(1-1-3)；The side cover (1-2) is provided centrally with bearing mounting hole two (1-2-1), and the quadrangle side cover (1-2) has been evenly arranged logical
Hole one (1-2-2)；The bearing (2-1) and bearing mounting hole one (1-1-1) and bearing mounting hole two (1-2-1) are interference fitted；
The threaded hole (1-1-3) is fastenedly connected with through-hole one (1-2-2) by holding screw (1-3).
3. the non-linear broadband piezoelectric energy harvesting device according to claim 1 towards tire pressure monitoring sensor energy supply, feature
It is that the rotary shaft (2-2) is provided with positioning shaft shoulder (2-2-1), installation annular groove (2-2-2) and mounting groove two (2-2-3), institute
It states positioning shaft shoulder (2-2-1) and is arranged symmetrically in the two sides rotary shaft (2-2), the installation annular groove (2-2-2) is symmetrically distributed in rotation
The two sides axis (2-2), installation annular groove (2-2-2) are provided with M, and M is the integer more than or equal to 1；The mounting groove two (2-2-3) sets
It sets at the middle part of rotary shaft (2-2)；The sector electromagnet (2-4) is symmetrically distributed in installation annular groove (2-2-2), sector electromagnet
(2-4) is equipped with and amplexiforms face (2-4-1), and the face (2-4-1) of amplexiforming is mounted in installation annular groove (2-2-2) by adhesive means；
The clamping device (2-5) is equipped with special-shaped through-hole (2-5-1), is arranged in the middle part of rotary shaft (2-2)；The clamping device (2-5)
A side end face be equipped with through-hole two (2-5-2), another side end face of clamping device (2-5) is equipped with installation threaded hole (2-5-
3)；The substrate (2-6) is provided with through-hole three (2-6-1) and mass block (2-6-2), and the mass block (2-6-2) is bonded in base
The free end of plate (2-6), the through-hole three (2-6-1) are arranged in substrate (2-6) side end, and the substrate (2-6) passes through logical
The cooperation in hole two (2-5-2), through-hole three (2-6-1) and installation threaded hole (2-5-3) utilizes fastening screw (2-3) to carry out screw thread company
Connect fixation.
4. the non-linear broadband piezoelectric energy harvesting device according to claim 1 towards tire pressure monitoring sensor energy supply, feature
It is to set up on piezoelectric substrate (3-2) side surface along the side of piezoelectric substrate (3-2) in the piezo-electric generating component (3)
Have N cantilever beam (3-2-1), N is the integer more than or equal to 1.
5. the non-linear broadband piezoelectric energy harvesting device according to claim 1 towards tire pressure monitoring sensor energy supply, feature
It is that the piezoelectric element (3-3) in the piezo-electric generating component (3) selects piezoelectric ceramic piece PZT or flexible piezoelectric material PVDF.
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| CN110460196B (en) * | 2019-09-20 | 2021-01-01 | 长春工业大学 | Multi-mode composite generator for supplying energy to tire pressure monitoring sensor |
| CN113258826A (en) * | 2021-05-10 | 2021-08-13 | 哈尔滨工业大学 | Rotary magnetic force frequency modulation type laminated efficient piezoelectric energy harvester |
| CN113258827B (en) * | 2021-05-10 | 2022-12-13 | 哈尔滨工业大学 | Rotary piezoelectric and electromagnetic array combined type energy harvester |
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| CN103259452B (en) * | 2013-05-31 | 2015-06-10 | 浙江师范大学 | Shaft-end overhung piezoelectric cantilever beam electric generator |
| CN103259453B (en) * | 2013-05-31 | 2015-04-29 | 浙江师范大学 | Piezoelectric cantilever beam generator for wind driven generator blade monitoring system |
| CN103684047B (en) * | 2013-12-18 | 2015-08-19 | 大连理工大学 | The rotary piezoelectric electromagnetism hybrid generator that a kind of wind-force drives |
| CN105958868B (en) * | 2016-06-15 | 2017-10-10 | 浙江师范大学 | A kind of shaft end suspends rotary-type piezoelectric beam energy accumulator |
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