CN108630480A - A kind of rotary self energizing wireless switching - Google Patents
A kind of rotary self energizing wireless switching Download PDFInfo
- Publication number
- CN108630480A CN108630480A CN201810475504.7A CN201810475504A CN108630480A CN 108630480 A CN108630480 A CN 108630480A CN 201810475504 A CN201810475504 A CN 201810475504A CN 108630480 A CN108630480 A CN 108630480A
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- permanent magnet
- wireless switching
- positioning
- cantilever
- permanent
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- 230000000694 effects Effects 0.000 claims abstract description 8
- 238000009434 installation Methods 0.000 claims abstract description 5
- 239000002184 metal Substances 0.000 claims description 11
- 230000005291 magnetic effect Effects 0.000 claims description 10
- 210000004907 gland Anatomy 0.000 claims description 5
- 239000000463 material Substances 0.000 claims description 5
- 229910000831 Steel Inorganic materials 0.000 claims description 2
- 239000010959 steel Substances 0.000 claims description 2
- 238000005096 rolling process Methods 0.000 claims 2
- 239000002033 PVDF binder Substances 0.000 claims 1
- 230000003993 interaction Effects 0.000 claims 1
- 229920002981 polyvinylidene fluoride Polymers 0.000 claims 1
- 238000009827 uniform distribution Methods 0.000 claims 1
- 238000005516 engineering process Methods 0.000 abstract description 3
- 238000010586 diagram Methods 0.000 description 4
- 230000005611 electricity Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000008054 signal transmission Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H19/00—Switches operated by an operating part which is rotatable about a longitudinal axis thereof and which is acted upon directly by a solid body external to the switch, e.g. by a hand
- H01H19/02—Details
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H19/00—Switches operated by an operating part which is rotatable about a longitudinal axis thereof and which is acted upon directly by a solid body external to the switch, e.g. by a hand
- H01H19/02—Details
- H01H19/10—Movable parts; Contacts mounted thereon
- H01H19/14—Operating parts, e.g. turn knob
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02N—ELECTRIC MACHINES NOT OTHERWISE PROVIDED FOR
- H02N2/00—Electric machines in general using piezoelectric effect, electrostriction or magnetostriction
- H02N2/18—Electric machines in general using piezoelectric effect, electrostriction or magnetostriction producing electrical output from mechanical input, e.g. generators
- H02N2/186—Vibration harvesters
Landscapes
- Rotary Switch, Piano Key Switch, And Lever Switch (AREA)
- General Electrical Machinery Utilizing Piezoelectricity, Electrostriction Or Magnetostriction (AREA)
Abstract
A kind of rotary self energizing wireless switchgear using piezoelectric energy acquisition principle is related to wireless switching technology field, solves the energy acquisition and break-make Structure Designing Problem of wireless switching.The device includes rotating housing sections, inner shaft body portion and make break contact part.Rotational shell body inner surface has the first permanent magnet of symmetrical circumference array installation, inner shaft body portion includes rotary shaft, power generator and positioning device, power generator is mainly piezoelectric cantilever, positioning device includes spring, spring pushes away and positioning ball, make break contact part is mainly buckled beam and contact, the middle part of buckled beam is installed by the second permanent magnet, second permanent magnet by the first permanent magnet and third permanent magnet collective effect, the break-make pattern of attraction and repulsive force that rotating housing sections achieve that between the first permanent magnet and the second permanent magnet switched and change structure is dialled in rotation.The present invention can be used for the energy supply structure and circuit on-off structure of wireless switching.
Description
Technical field
The present invention relates to a kind of using piezoelectric energy acquisition electric energy and realizes the method and device of remote control circuit on-off,
The mechanical energy that pass is pushed in manual rotation aside can effectively be collected to generate electricity, belong to piezoelectric energy acquisition and self energizing wireless switching
Field.
Background technology
In recent years as the universal and wireless sensor network of portable electronic device is flourished, wirelessly to set
The problem of available energy, gets more and more people's extensive concerning.Vibrational energy belongs to reproducible clean energy resource, has cheap excellent of environmental protection
Vibrational energy in rotary motion can be converted to electric energy by the direct piezoelectric effect of point, piezoelectric material, with realize wireless switching from
Energy supply, is a kind of energy supply method with feasibility.
Piezoelectric energy collecting device have it is simple in structure, calorific value is few, it is anti-interference strong the advantages that, to mechanical vibrational energy
Using with preferable effect, especially in the acquisition of micro-energy and utilization.
The relevant technology of already present wireless switching in the market, but universal is all push switch, rotary structure energy
The space of structure is efficiently used, reasonable and compact miniaturization structure has greater advantage for the application of wireless switching.
Invention content
The present invention will collect the mechanical vibrational energy of rotary switch and be generated electricity using piezoelectric effect, and power storage is arrived
It is easy to operate using micro- controlling electric energy signal transmission component to control the break-make of main circuit in energy storing structure, simple in structure, tool
There is ideal generating effect and controls the effect of distal line break-make.
In order to solve the above technical problems, technical scheme is as follows:A kind of rotation using piezoelectric energy acquisition principle
Housing main body 10 is dialled in rotatable self energizing wireless switching, rotation, and housing main body 10 drives the rotation of the first permanent magnet 61, axis body 6 to pass through
Upper bearing (metal) 3 and lower bearing 9 and the centre bore of housing main body 10 are co-axially mounted, and are sequentially installed on axis body 6 and are adopted energy part 4 and slip ring
5, it includes cantilever beam fixture 21, piezoelectric cantilever 22 and third permanent magnet 23 to adopt energy part 4, and piezoelectric cantilever 22 fixes peace
On cantilever beam fixture 21, third permanent magnet 23 is pasted onto the free end of piezoelectric cantilever 22,22 end of piezoelectric cantilever
Third permanent magnet 23 magnetic pole put it is identical, slip ring 5 be mounted on adopt can part lower end, will adopt can part 4 it is collected
Electric energy is transferred on slip ring 5, and positioning device 8 pushes away 42 and spring 43 including positioning ball 41, spring, and positioning ball 42 can be in axis
Rotation in the shallow grooves of head, shallow groove depths are the half of the radius of positioning ball 42, and can be positioned in four deep pits, deep
The depth of pit is identical with the radius of positioning ball 42, and spring 43 pushes away 42 application elastic force to spring, and spring pushes away 42 to positioning ball
41 application elastic force include contact 62, buckled beam 63 and buckled beam fixture 64 to ensure accurate positioning, make break contact part 7, are touched
Point 62 is pasted onto on the inner surface of the first permanent magnet 61, and buckled beam 63 is mounted on buckled beam fixture 64, buckled beam 63
The second permanent magnet 65 is pasted at middle part, and the second permanent magnet 65 is right against contact 62, and the N of first permanent magnet 61 is extremely just
When to the second permanent magnet 65, the first permanent magnet 61 is more than 65 attraction of the second permanent magnet the suction of third permanent magnet 23
Gravitation, for buckled beam 63 to the direction buckling of the first permanent magnet 61, then the second permanent magnet 65 is contacted with contact 62 makes circuit believe
Number connect, when rotational shell main body 10 makes the poles S the second permanent magnet 65 of face of adjacent first permanent magnet 61, the first permanent magnetic
Body 61 applies repulsive force to the second permanent magnet 65, and buckled beam 63 is to the direction buckling of third permanent magnet 23, then second is permanent
For magnet 65 with contact 62 far from making line signal disconnect, upper end cover 2 is mounted on the upper end of housing main body 10, upper bearing (metal) gland 1
It is separately mounted to the surface of upper end cover 2 and housing main body 10 with lower axle pressure cap 11, and coordinates respectively with 3 lower bearing 9 of upper bearing (metal)
Installation.
Compared with prior art, the beneficial effects of the invention are as follows:
(1) piezoelectric cantilever is combined with buckled beam so that the electric flux of acquisition is more sufficient, is provided for the transmission of signal
Ensure.
(2) positioning device of spring and steel ball composition is applied in the positioning of switch so that the standard of switch on and off position
It is really and reliable.
(3) mode conversion and autonomous energy supply are switched on-off using rotary structure realization so that compact overall structure
Rationally.
(4) magnet structure is introduced, the energy of rotary motion is converted to by beam by attraction between magnet and repulsion force
The vibrational energy of body.
(5) buckling girder construction is applied to and is switched on-off in structure, good reliability.
(6) stable structure of the invention, assembly is simple, good economy performance.
Description of the drawings
Fig. 1 is overall structure of the present invention;
Fig. 2 is energy collecting device structural schematic diagram in the present invention;
Fig. 3 is the vertical view of energy collecting device in the present invention;
Fig. 4 is positioning device structure schematic diagram in the present invention;
Fig. 5 is positioning device structure vertical view in the present invention;
Fig. 6 is piezoelectric cantilever and buckled beam cooperation schematic diagram in the present invention;
Fig. 7 is overall structure sectional view of the present invention;
Fig. 8 is the break-make ideograph of the make break contact structure of the present invention
Description of the drawings:
1- upper bearing (metal) gland 2- upper end cover 3- upper bearing (metal)s 4- is adopted can part
5- slip ring 6- axis body 7- make break contacts part 8- positioning devices
9- lower bearing 10- housing main body 11- lower axle pressure cap 21- cantilever beam fixtures
22- piezoelectric cantilever 23- third permanent magnet 41- positioning balls
42- springs push away the contacts 43- springs 61- the first permanent magnet 62- 63- buckled beam 64- buckled beam fixtures 65-
Second permanent magnet
Specific implementation mode
The present invention is described in further detail with reference to specific embodiment.
As shown in Figures 1 to 8, a kind of rotary self energizing wireless switching.
Fig. 1 is whole assembling schematic diagram, and Fig. 7 is overall structure sectional view, including rotating housing sections, piezo-electric generating portion
Point, spring positioning part and make break contact part.
As depicted in figs. 1 and 2, housing main body 10 is dialled in rotation, and housing main body 10 drives the rotation of the first permanent magnet 61, axis body 6
It is co-axially mounted by upper bearing (metal) 3 and lower bearing 9 and the centre bore of housing main body 10, is sequentially installed on axis body 6 and adopts 4 He of energy part
Slip ring 5, upper end cover 2 are mounted on the upper end of housing main body 10, and upper bearing (metal) gland 1 and lower axle pressure cap 11 are separately mounted to upper end
The surface of lid 2 and housing main body 10, and coordinate with 3 lower bearing 9 of upper bearing (metal) install respectively.
As shown in Figures 2 and 3, piezo-electric generating part i.e. adopt can part 4, including cantilever beam fixture 21, piezoelectric cantilever 22,
Third permanent magnet 23 and slip ring 5, piezoelectric cantilever 22 are fixedly mounted on cantilever beam fixture 21, and third permanent magnet 23 is viscous
It is attached to the free end of piezoelectric cantilever 22, the magnetic pole of the third permanent magnet 23 of four cantilever beam ends puts all same, the i.e. poles N
Inside S is extremely outside, and slip ring 5 is mounted on the lower end for adopting energy part, will adopt 4 collected electric energy of energy part and is transferred on slip ring 5, prevents
Only circuit tangles.
As shown in Figure 4 and Figure 5, spring positioning part is exactly that the spindle nose of axis body 6 is determined with the cooperation of positioning device 8 with realizing
Position, positioning device 8 push away 42 and spring 43 including positioning ball 41, spring, and positioning ball 42 can be in the shallow grooves inward turning of spindle nose
Turn, and can be positioned in four deep pits, 43 push the spring of spring pushes away 42 and applies elastic force to positioning ball 41 to ensure that positioning is accurate
Really, and four positioning devices are assembled into four uniformly distributed circular through holes of housing main body 10, are located at the first permanent magnet
61 underface.
As shown in Figure 6 and Figure 8, make break contact part 7 includes contact 62, buckled beam 63 and buckled beam fixture 64, contact
62 are pasted onto the inner surface of the first permanent magnet 61 and are right against the second permanent magnet 65, and buckled beam 63 is mounted on buckled beam
On fixture 64, the second permanent magnet 65 is installed at the middle part of buckled beam 63, and the second permanent magnet 65 is right against contact 62, and four are bent
It is all the extremely inside S of N extremely outside that the magnetic pole of second permanent magnet 23 at 63 middle part of curved beam, which is put homogeneous, when the first permanent magnet 61
When the second permanent magnet 65 of face of the poles N, the first permanent magnet 61 is more than third permanent magnet to 65 attraction of the second permanent magnet
The attraction of 23 pair of second permanent magnet 65, buckled beam 63 is to the direction buckling of the first permanent magnet 61, then the second permanent magnet
65 contact with contact 62 line signal are made to connect, and rotational shell main body 10 makes the poles the S face of the first permanent magnet of adjacent volume 61
When two permanent magnets 65, the first permanent magnet 61 applies repulsive force to the second permanent magnet 65, and third permanent magnet 23 is to second
Permanent magnet 65 applies attraction, buckled beam 63 to the direction buckling of third permanent magnet 23, then the second permanent magnet 65 with touch
Point 62 is separate to make line signal disconnect.
Although above in conjunction with figure, invention has been described, and the invention is not limited in above-mentioned specific embodiment parties
Formula, the above mentioned embodiment is only schematical, rather than restrictive, the case where not departing from present inventive concept
Under, many variations can also be made, these belong to the protection category of the present invention.
Claims (10)
1. a kind of rotary self energizing wireless switching, it is characterized in that:The device include rotating housing sections, inner shaft body portion and
Make break contact part;Rotation dial the rotating housing sections, the rotating housing sections include housing main body (10), upper end cover (2),
Upper bearing (metal) gland (1), lower axle pressure cap (11) and the first permanent magnet (61), housing main body (10) inner surface have symmetrically
The first permanent magnet (61) of circumference array installation amounts to four, and the upper end cover (2) is mounted on the upper table of housing main body (10)
Face, the upper bearing (metal) gland (1) and lower axle pressure cap (11) are separately mounted to the upper and lower surface of shell, the inner shaft body portion
Including rotary shaft (6), power generator (4) and positioning device (8), it is shallow that the spindle nose part of the rotary shaft (6) is milled with a circle
Groove and four of the circumference uniform distribution round deep pits in groove line, power generator (4) includes piezoelectric cantilever (22), outstanding
Arm beam fixture (21) and slip ring (5), the piezoelectric cantilever (22) are fixedly mounted on cantilever beam fixture (21), piezoelectric cantilever
The free end installation third permanent magnet (23) of beam, third permanent magnet (23) magnetic pole side of putting of piezoelectric cantilever (22) end
Formula be the poles N the inside poles S on the outside, the cantilever beam fixture (21) is sleeved in rotary shaft body (6), and the slip ring (5) is located at
It cantilever beam fixture (21) lower end and is assemblied in rotary shaft body (6), the positioning device (8) includes that spring (43), spring push away
(42) and positioning ball (41), the positioning ball (41) can roll rotation in the shallow grooves of rotary shaft body (6), and when rolling
It moves to when deep pit and is blocked to realize that positioning, spring (43) push the spring push away (42) to positioning ball with deep pit with merging
(41) apply elastic force and ensure that accurate positioning, the make break contact part include buckled beam (63), buckled beam fixture (64) and touch
Point (62), the buckled beam (63) are fixedly mounted on buckled beam fixture (64), and the middle part of buckled beam (63) pastes second permanently
Magnet (65), when the poles N the second permanent magnet of face (65) of first permanent magnet (61), the first permanent magnet (61) is to
Two permanent magnets (65) attraction is more than the attraction of third permanent magnet (23), and buckled beam (63) is to the first permanent magnet (61)
Direction buckling, then the second permanent magnet (65) is contacted with contact (62) makes line signal connect, and realizes the connection of wireless switching
Pattern, when rotational shell main body (10) makes the poles S the second permanent magnet of face (65) of the first permanent magnet of adjacent volume (23), first
Permanent magnet (61) applies repulsive force to the second permanent magnet (65), and buckled beam (63) is bent to the direction of third permanent magnet (23)
Song, then switch-off pattern is realized in the second permanent magnet (65) and contact (62) far from making line signal disconnect.
2. according to the rotary self energizing wireless switching described in claim 1, it is characterised in that:The rotating housing sections by
Rotation is dialled manually, drives the first permanent magnet (61) rotation on housing main body (10) inner surface, adjacent two the first permanent magnetics
The magnetic pole disposing way of body (61) is the extremely outside or extremely inside S disposing ways of S on the contrary, when two adjacent the first permanent magnets
(61) attraction and repulsive force are applied respectively to the second permanent magnet with face when a certain second permanent magnet (23) respectively.
3. according to the rotary self energizing wireless switching described in claim 1, it is characterised in that:The buckled beam (63) is selected
Material is flexible material, and buckled beam (63) prebuckling is mounted on buckled beam fixture (64), and second in the middle part of buckled beam (63) is forever
Collective effect of the long magnet (65) by the first permanent magnet (61) and third permanent magnet (23).
4. according to the rotary self energizing wireless switching described in claim 3, it is characterised in that:First permanent magnet
(61) when the poles N the second permanent magnet of face (65), the first permanent magnet (61) is more than the second permanent magnet (65) attraction
The attraction of third permanent magnet (23), buckled beam (63) is to the direction buckling of the first permanent magnet (61), then the second permanent magnetic
Body (65) is contacted with contact (62) makes line signal connect, and rotational shell main body (10) makes the first permanent magnet of adjacent volume (23)
When the poles S the second permanent magnet of face (65), the first permanent magnet (61) applies repulsive force, buckled beam to the second permanent magnet (65)
(63) to the direction buckling of third permanent magnet (23), then the second permanent magnet (65) and contact (62) are far from keeping line signal disconnected
It opens.
5. according to the rotary self energizing wireless switching described in claim 1, it is characterised in that:Positioning device (8) packet
Include spring (43), spring pushes away (42) and positioning ball (41), the spring (43), spring push away (42) and positioning ball (41)
It being respectively positioned in the location hole in housing main body (10), the positioning ball (41) can roll in the shallow grooves of rotary shaft body (6),
And rolling at deep groove position and stable positioning is realized in deep pit cooperation, spring (43) push the spring push away (42) to
Positioning ball (41) applies elastic force and ensures accurate positioning.
6. according to the rotary self energizing wireless switching described in claim 1, it is characterised in that:Power generator (4) packet
Piezoelectric cantilever (22), cantilever beam fixture (21) and slip ring (5) are included, the piezoelectric cantilever (22) is fixedly mounted on cantilever beam
On fixture (21), the free end installation third permanent magnet (23) of piezoelectric cantilever, the third of piezoelectric cantilever (22) end is forever
Long magnet (23) magnetic pole disposing way is identical, and third permanent magnet (23) is in rotary course and the phase of the second permanent magnet (65)
Interaction generates vibration, and vibrational energy is acquired using the piezoelectric effect of the piezoelectric material on piezoelectric cantilever (22).
7. according to the rotary self energizing wireless switching described in claim 1, it is characterised in that:The piezoelectric cantilever (22)
On piezoelectric material be Kynoar (PVDF), amount to four.
8. according to the rotary self energizing wireless switching described in claim 1, it is characterised in that:From upper on the axis body (6)
It is co-axially mounted upper bearing (metal) (3), cantilever beam fixture (21), slip ring (5) and lower bearing (9) according to this under, spindle nose is located at slip ring (5)
Between lower bearing (9).
9. according to the rotary self energizing wireless switching described in claim 1, it is characterised in that:When the connection pattern, the
The extremely inside S of N of one permanent magnet (61) are extremely outside, and the extremely inside S of N of the second permanent magnet (65) are extremely outside, third permanent magnet
(23) the extremely inside S of N are extremely outside, and the first permanent magnet (61) is more than third forever to the attraction of the second permanent magnet (65)
Long magnet (23) is to the attractions of the second permanent magnet (65), and the second permanent magnet (65) is contacted with contact (62) under this pattern;
When the shutdown mode, the extremely outside S of N of the first permanent magnet (61) extremely inwardly with the pattern of connection when it is exactly the opposite, second is permanent
The extremely inside S of N of magnet (65) are extremely outside, and the extremely inside S of N of third permanent magnet (23) are extremely outside, the first permanent magnetic under this pattern
Body (61) applies repulsive force to the second permanent magnet (65), and third permanent magnet (23) applies the second permanent magnet (63) and attracts
Power, the second permanent magnet (63) and contact (65) disconnect contactless under this pattern.
10. according to the rotary self energizing wireless switching described in claim 1, it is characterised in that:The depth of deep pit with it is fixed
The radius of position steel ball (41) is identical, and shallow grooves are the half of the radius of positioning ball (41).
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CN201810475504.7A CN108630480B (en) | 2018-05-17 | 2018-05-17 | A kind of rotary self energizing wireless switching |
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CN201810475504.7A CN108630480B (en) | 2018-05-17 | 2018-05-17 | A kind of rotary self energizing wireless switching |
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CN108630480A true CN108630480A (en) | 2018-10-09 |
CN108630480B CN108630480B (en) | 2019-11-15 |
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CN201810475504.7A Expired - Fee Related CN108630480B (en) | 2018-05-17 | 2018-05-17 | A kind of rotary self energizing wireless switching |
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Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN109167532A (en) * | 2018-10-22 | 2019-01-08 | 西南交通大学 | A kind of automobile inertial energy piezoelectric type acquisition device |
CN110829791A (en) * | 2019-11-05 | 2020-02-21 | 德能森智能科技(成都)有限公司 | High-generating-capacity rotary wireless passive device |
CN112332695A (en) * | 2020-09-29 | 2021-02-05 | 长春工业大学 | Rotating shaft type piezoelectric power generation device |
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CN202663322U (en) * | 2012-05-28 | 2013-01-09 | 南京航空航天大学 | Rotary piezoelectric power generating device |
US20170085194A1 (en) * | 2015-09-17 | 2017-03-23 | Samsung Electro-Mechanics Co., Ltd. | Wireless switch and method |
CN106856382A (en) * | 2017-01-12 | 2017-06-16 | 合肥工业大学 | A kind of rotatable movement and the piezoelectric energy collecting device being axially moved |
CN107994808A (en) * | 2017-12-10 | 2018-05-04 | 北京工业大学 | Alternation flexion type wind-force piezoelectric energy collector |
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2018
- 2018-05-17 CN CN201810475504.7A patent/CN108630480B/en not_active Expired - Fee Related
Patent Citations (5)
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CN202663322U (en) * | 2012-05-28 | 2013-01-09 | 南京航空航天大学 | Rotary piezoelectric power generating device |
CN102790548A (en) * | 2012-07-18 | 2012-11-21 | 天津大学 | Bistable composite cantilever beam piezoelectric power generating device |
US20170085194A1 (en) * | 2015-09-17 | 2017-03-23 | Samsung Electro-Mechanics Co., Ltd. | Wireless switch and method |
CN106856382A (en) * | 2017-01-12 | 2017-06-16 | 合肥工业大学 | A kind of rotatable movement and the piezoelectric energy collecting device being axially moved |
CN107994808A (en) * | 2017-12-10 | 2018-05-04 | 北京工业大学 | Alternation flexion type wind-force piezoelectric energy collector |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN109167532A (en) * | 2018-10-22 | 2019-01-08 | 西南交通大学 | A kind of automobile inertial energy piezoelectric type acquisition device |
CN110829791A (en) * | 2019-11-05 | 2020-02-21 | 德能森智能科技(成都)有限公司 | High-generating-capacity rotary wireless passive device |
CN113014066A (en) * | 2019-11-05 | 2021-06-22 | 德能森智能科技(成都)有限公司 | High-generating capacity rotary wireless switch |
CN113014066B (en) * | 2019-11-05 | 2022-10-18 | 德能森智能科技(成都)有限公司 | High-generating capacity rotary wireless switch |
CN112332695A (en) * | 2020-09-29 | 2021-02-05 | 长春工业大学 | Rotating shaft type piezoelectric power generation device |
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