CN211266795U - Experience formula teaching is with collision vibration energy collection system - Google Patents
Experience formula teaching is with collision vibration energy collection system Download PDFInfo
- Publication number
- CN211266795U CN211266795U CN201922423269.1U CN201922423269U CN211266795U CN 211266795 U CN211266795 U CN 211266795U CN 201922423269 U CN201922423269 U CN 201922423269U CN 211266795 U CN211266795 U CN 211266795U
- Authority
- CN
- China
- Prior art keywords
- vibration
- cantilever beam
- collision
- teaching
- steel ball
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Landscapes
- General Electrical Machinery Utilizing Piezoelectricity, Electrostriction Or Magnetostriction (AREA)
Abstract
The utility model relates to an experiential type collision vibration energy acquisition device for teaching, which comprises a base, a piezoelectric cantilever beam, a sleeve and a steel ball; one end of the piezoelectric cantilever beam is fixed on the base in a rigid fixing mode, and the other end of the piezoelectric cantilever beam is free; the sleeve is fixed at the free end of the beam, and the steel ball can jump up and down in the sleeve along with the vibration of the beam; the utility model provides a collision formula energy acquisition device for teaching can effectual improvement tradition cantilever beam's output, and the micro-vibration in the environment is gathered to the efficient provides the low-grade energy for the experience formula teaching equipment of low-power consumption, has wide application prospect in the experience formula teaching equipment field of low-power consumption.
Description
Technical Field
The utility model belongs to experience formula teaching equipment and renewable energy field, in particular to utilize steel ball collision phenomenon to improve piezoelectricity cantilever beam type energy acquisition device's output electric power and energy conversion rate.
Background
With the continuous development of information technology, the advanced education concept is also developed rapidly under the drive of the technology. Under the impact of new education thought and concept in a new era, the traditional teaching mode and the traditional teaching equipment are gradually changed, and the novel interactive teaching mode and the novel interactive teaching equipment begin to completely reveal the head and corners and occupy a place of the education equipment. The interactive teaching is a popular teaching mode at present in schools, and gradually replaces the traditional teaching mode. The interactive teaching focuses on the ability of self-learning of students, so that the students can really participate in classroom teaching, and the learning efficiency of the students in classroom can be improved.
The conversion of the education mode also brings a new opportunity for the innovation of the teaching equipment, and the power supply mode of the traditional teaching equipment mainly comprises battery power supply and power supply. For battery power, the battery has limited capacity, short life, and unknown time for consuming the electricity, and for those devices that are not used for a long time, the battery inside will corrode the device, and the disposal of the discarded battery is troublesome. For power supply, equipment is often required to be powered in a classroom through an external plug board mode, and the exposed cable socket has great potential safety hazards and influences the attractiveness of the classroom. Therefore, the method has great value for the research on the power supply problem of the experience type teaching equipment.
Vibration energy widely exists in the environment, utilize piezoelectric material to convert the vibration energy in the environment into the electric energy and for micro-electromechanical device and wireless sensing node power supply at home and abroad obtain extensive research, wherein, cantilever beam structure's piezoelectric energy collector is comparatively common, however, traditional cantilever beam adds the energy collector output electric power of quality piece fixed knot structure and is lower, energy collector frequency response scope is little, the vibration energy of conversion is limited, in order to improve piezoelectric cantilever beam structure's energy collector's voltage output, there are many expert scholars to propose the energy collection device based on collision vibration.
SUMMERY OF THE UTILITY MODEL
In order to solve the problem, in order to exert the electric energy collection efficiency of collision vibration better, the utility model provides a take telescopic perpendicular collision vibration's cantilever beam energy harvester.
In order to solve the problems, the utility model provides an experiential type collision vibration energy acquisition device for teaching, which mainly comprises a base, a piezoelectric cantilever beam, a sleeve and a steel ball; one end of the piezoelectric cantilever beam is fixed on the base, the other end of the piezoelectric cantilever beam freely vibrates, the sleeve is fixed at the free end, and the steel ball can freely jump in the sleeve; when the collecting device is used, vibration can be generated along with the movement of a user, the piezoelectric cantilever beam can generate forced vibration under the excitation of the outside, when the vibration acceleration of the sleeve at the tail end of the beam is larger than the gravity acceleration of the steel ball, the steel ball can be separated from the piezoelectric beam to do uniform deceleration movement upwards, the acceleration is g, the direction is downward, when the steel ball rises to the highest position, the speed is 0, then free-falling body movement is performed, when the steel ball contacts the tail end of the beam again, part of kinetic energy is transmitted to the cantilever beam by the steel ball, the cantilever beam impacted by the steel ball generates self-excited vibration on the basis of the forced vibration, the stress on the piezoelectric film on the piezoelectric cantilever beam is changed, a potential difference is generated between the two electrodes, and the conversion of the vibration energy to electric energy is; compared with the vibration response of the non-spherical cantilever beam, the vibration with free response is added, the frequency range of the vibration response is widened, the difference of the voltages generated by the two energy collectors can be seen from an oscilloscope, and the experimental results of a principle prototype can be further manufactured for comparison.
Compare with traditional cantilever beam formula energy collector, the utility model discloses the vibration excitation of well piezoelectric beam comprises two parts, is the excitation that the collision produced when vibration excitation in the environment and steel ball whereabouts respectively.
Vibration excitation transmitted to the bottom support by a user hand or environment and excitation generated by collision of the steel ball on the beam drive the piezoelectric beam to vibrate, and the PVDF piezoelectric film converts vibration energy into electric energy to supply power for teaching equipment.
The steel ball which can jump freely is introduced, the deformation of the piezoelectric cantilever beam is increased, the frequency response range of the collector is widened, and the output electric power is improved.
The technical scheme of the utility model as follows: the utility model provides an experience formula teaching is with collision vibration energy collection system, includes the piezoelectricity cantilever beam, and the one end of piezoelectricity cantilever beam is the stiff end, and the other end of piezoelectricity cantilever beam is provided with passive vibration excitation device.
The utility model provides an experience formula is collision vibration energy collection system for teaching still has following technical characteristic:
furthermore, one end of the piezoelectric cantilever beam, which is provided with the passive vibration excitation device, is a free end.
Further, the passive vibration excitation device is composed of a sleeve and a collision mass, and the collision mass is arranged in the sleeve.
Furthermore, the piezoelectric cantilever beam is composed of a thin plate and a piezoelectric film, one end of the piezoelectric cantilever beam is fixed on the base, and the other end of the piezoelectric cantilever beam is a free end and is provided with the passive vibration excitation device above the free end. The fixing means may be gluing, bolting, screwing, welding or other rigid fixing means of the metal member. Wherein adopt the bolt fastening mode to fix between one end of piezoelectricity cantilever beam and the base can adopt one or two bolts to fix, also can increase the mode of backing plate, and the guarantee between the two for the rigidity fixed can.
Further, the stiff end of piezoelectricity cantilever beam be provided with the base, like this the utility model discloses the creation can be through the vibration in the base absorption environment, and then through the piezoelectricity cantilever beam absorption collection vibration energy.
Furthermore, the collision mass block is a steel ball.
Furthermore, the thin plate is made of FR-4 material.
Further, the piezoelectric film is of PVDF type.
Further, the passive vibration excitation means may be other vibration input sources as follows: a vibration source exciting device consisting of a compression spring, a vibration source exciting device consisting of an extension spring, a reciprocating motion exciting device driven by a motor, or a vibration source device with magnetism mutual exclusion or mutual attraction.
The utility model has the following advantages that the following points are provided by combining the concrete technical means:
compare no ball piezoelectricity cantilever beam energy harvesting device, the utility model has the following characteristics:
1. the utility model provides an utilize method of steel ball and piezoelectricity composite beam collision electricity generation, through introducing the steel ball of a free bounce, can turn into the kinetic energy of whereabouts in-process with the gravitational potential energy of steel ball, turn into the bending potential energy of roof beam with kinetic energy again in the twinkling of an eye of cantilever beam collision, so the roof beam takes place forced vibration and gets the while under the external excitation, take place the self-excited vibration again under the collision of steel ball, the bending deformation increase of roof beam, the stress variation increase that piezoelectric film received, and then can produce bigger electric power output.
2. The utility model discloses in increased a sleeve at piezoelectricity cantilever beam free end, the steel ball can only beat along vertical direction in the sleeve, has restricted the steel ball and has beated about, guarantees that the steel ball can not fall outside the roof beam, and the drop point is all the time at the end of roof beam, can form the impact that lasts to the roof beam.
3. The utility model discloses well piezoelectricity cantilever beam adopts one end fixed, and the mode of one end free vibration has reduced the rigidity of whole device, and bigger deformation can take place for the roof beam. In addition, the power generation characteristic of the device can be improved by changing the mass of the steel ball, the elongation of the cantilever beam and adding a counterweight mass block at the free end of the cantilever beam.
4. Will the utility model provides a collision formula energy acquisition device uses in low-power consumption experience formula teaching equipment, the external small vibration of perception that can be better, and the piezoelectric beam can take place bigger deformation under the dual function of external vibration and steel ball collision, produces more electric quantities and for the teaching equipment power supply in the use, improve equipment's reliability and teaching efficiency have extensive application prospect in low-power consumption teaching equipment field.
5. The utility model provides a passive vibration excitation device can be for following other vibration input sources: a vibration source exciting device consisting of a compression spring, a vibration source exciting device consisting of an extension spring, a reciprocating motion exciting device driven by a motor, or a vibration source device with magnetism mutual exclusion or mutual attraction; wide types, convenient combination and good effect.
Drawings
Fig. 1 is a perspective view of an experimental type collision vibration energy collecting device for teaching according to an embodiment of the present invention;
fig. 2 is a top view of an experimental teaching collision vibration energy collecting device according to an embodiment of the present invention;
fig. 3 is a voltage waveform diagram of an output voltage of the energy collecting device of the ball-free cantilever beam of the experimental vibration energy collecting device for teaching according to the embodiment of the present invention;
fig. 4 is a voltage waveform diagram of an output voltage of the energy collecting device of the spherical cantilever beam of the experimental vibration energy collecting device for teaching according to the embodiment of the present invention;
fig. 5 is the utility model discloses an experience formula teaching is with collision vibration energy collection system's stereogram.
Fig. 6 is the utility model discloses an experience formula teaching is with collision vibration energy collection system's stereogram.
In the figure: 1. base 2, piezoelectric film 3, sheet metal 4, sleeve 5, steel ball.
Detailed Description
The present invention will be described in detail below with reference to the accompanying drawings in conjunction with embodiments. It should be noted that, in the present invention, the embodiments and features of the embodiments may be combined with each other without conflict.
The experimental type collision vibration energy collecting device for teaching shown in figures 1-6 comprises a piezoelectric cantilever beam, wherein one end of the piezoelectric cantilever beam is a fixed end, and the other end of the piezoelectric cantilever beam is provided with a passive vibration exciting device.
The difference between fig. 1 and fig. 5 is the structural difference of the base, the extending end is higher than the base, and the use requirements of the utility model can be satisfied due to the structural difference.
The difference between fig. 1 and fig. 6 is that the mounting structure of the base and the piezoelectric cantilever beam is different, and a rigid fixing mode of bolt fixing or non-bolt fixing can be adopted.
The utility model discloses when creating the implementation, at first, the cantilever beam takes place the forced vibration and gets the while under external excitation, takes place the vibration of exciting certainly again under the passive vibration excitation device effect, the bending deformation increase of roof beam, the stress variation increase that piezoelectric film received, and then can produce bigger electric power output.
In one embodiment of the application, one end of the piezoelectric cantilever beam, which is provided with the passive vibration excitation device, is a free end, so that the rigidity of the whole device is reduced, and the beam can deform more.
In an embodiment of the application, the passive vibration excitation device is composed of a sleeve and a collision mass block, the collision mass block is arranged in the sleeve, so that the collision mass block can jump in the sleeve along the vertical direction, the left-right jumping of the collision mass block is limited, the collision mass block can not fall outside a beam, a falling point is always at the tail end of the beam, and continuous impact can be formed on the beam.
In an embodiment of the present application, the piezoelectric cantilever beam is composed of a thin plate and a piezoelectric film, one end of the piezoelectric cantilever beam is fixed on the base by gluing or bolts or other rigid fixing methods, the other end of the piezoelectric cantilever beam is a free end and the passive vibration excitation device is arranged above the free end, so that the rigidity of the whole device is reduced, and the beam can deform more.
In one embodiment of the application, one end of the piezoelectric cantilever beam, which is provided with the passive vibration excitation device, is also fixedly connected with a damping device, so that the superposition effect of vibration and different wave curves can be seen through an oscilloscope, and an attenuation curve of an energy conversion process can be displayed.
In one embodiment of the application, the fixed end of the piezoelectric cantilever beam is provided with a base, so that the rigidity of the whole device is reduced, and the beam can deform more.
In one embodiment of the application, the collision mass block is a steel ball, is easy to obtain, and has low cost and simple structure.
In one embodiment of the application, the thin plate is made of FR-4 materials, and is low in material cost, convenient to implement, firm and durable.
In an embodiment of the application, the piezoelectric film is of a PVDF type, the type application is simple and convenient, and the conversion efficiency is high.
In one embodiment of the present application, the passive vibration excitation means may be other vibration input sources as follows: a vibration source exciting device consisting of a compression spring, a vibration source exciting device consisting of an extension spring, a reciprocating motion exciting device driven by a motor, or a vibration source device with magnetism mutual exclusion or mutual attraction; the method has the advantages of multiple selectable types, convenience in implementation, low cost and contribution to displaying various types of converted energy forms. The passive vibration exciting device is used as an exciting source to drive the cantilever beam to vibrate up and down, when the vibration acceleration of the free end of the cantilever beam is greater than the gravity acceleration of the steel ball, the steel ball can be separated from the beam, the steel ball bounces up first, and then the cantilever beam is impacted and collided downwards under the action of gravity, so that the frequency response range of the collector is widened, and the output voltage is increased.
In an embodiment of the present application, the utility model provides an experimental type collision vibration energy collecting device for teaching, which comprises a base 1, a piezoelectric film 2, a thin plate 3, a sleeve 4 and a steel ball 5; the sheet 3 is made of FR-4 materials, the piezoelectric film and the sheet form a piezoelectric cantilever beam, one end of the piezoelectric cantilever beam is fixed on the base in a bolt mode, the base is cuboid in shape, the other end of the cantilever beam freely vibrates, the sleeve is fixed at the free end of the beam, the steel ball jumps in the sleeve along the vertical direction, the height of the sleeve is greater than the highest jumping height of the steel ball, the steel ball cannot fall outside the sleeve, the diameter of the sleeve is greater than that of the steel ball, and the steel ball cannot have overlarge kinetic energy loss when jumping in the sleeve; the piezoelectric film is fixed on the upper part of the FR-4 thin plate in an adhesive manner; as the experiment shown in figure 4 shows the utility model provides an experience formula teaching is with collision vibration energy collection system can effectively gather vibration energy in the environment, improves output voltage.
In an embodiment of the application, in order to further verify the feasibility of the collision vibration energy collecting device for teaching provided by the utility model, a principle prototype is made for experiment, for better explanation, the experimental device with steel ball and without steel ball is respectively tested, and the experimental result is compared and analyzed; in a principle prototype, the length of an FR-4 thin plate is 100mm, the width is 13mm, the thickness is 1mm, the length of a PVDF piezoelectric film is 40mm, the width is 11mm, the thickness is 0.2mm, and the diameter of a steel ball is 6.5 mm; the energy collecting device of the utility model is fixed on the vibrating table, the excitation frequency of the vibrating table is set to be 40HZ, the acceleration is set to be 1g, the lead-out wires of the two electrodes of the PVDF piezoelectric film are connected on the probe of the oscilloscope during the experiment, the magnitude of the voltage generated by the collecting device can be observed in real time, meanwhile, the acceleration sensor is utilized to measure the vibration acceleration of the vibrating table at any time, and the acceleration is guaranteed to be unchanged; when a steel ball exists, the piezoelectric cantilever beam starts to generate forced vibration under the excitation of the vibrating table, when the vibration acceleration at the tail end of the cantilever beam is larger than the gravity acceleration of the steel ball, the steel ball can be separated from the cantilever beam and bounce up and down in the sleeve, when the steel ball collides with the cantilever beam, part of kinetic energy can be converted into bending potential energy of the beam, the deformation of the beam is increased at the moment, an oscilloscope can also see that the voltage between two electrodes of a piezoelectric film is also increased at the moment of collision, and when the steel ball is separated from the cantilever beam, the vibration of the beam is gradually attenuated, and the voltage value is reduced until the next collision; when no steel ball exists, the piezoelectric cantilever beam performs forced vibration under the vibration excitation of the vibration table, the voltage is small and is maintained in a stable state, and the voltage value cannot be suddenly increased; it can be seen from the oscilloscope that when the steel ball vibrates, the peak-to-peak value of the output voltage of the energy collecting device is maintained at about 9V, and the root mean square value of the voltage is about 3V, while after the steel ball is introduced, the peak-to-peak value of the output voltage can reach about 13V, and the root mean square value of the voltage can reach 4.33V at most, which is improved by 44%.
In an embodiment of this application, in addition in order to further improve the device vibration energy collection efficiency, can increase the quality of steel ball or increase the quality piece in the terminal one side relative with the sleeve of piezoelectric cantilever beam, the experiment shows the utility model provides a collision vibration energy collection device for experiential teaching can effectively gather vibration energy in the environment, improves output voltage.
In an embodiment of the application, compared with the vibration response of a non-spherical cantilever, the vibration with free response is added, the frequency range of the vibration response is widened, the difference of the voltages generated by the two energy collectors can be seen from an oscilloscope, and the experimental result of a manufactured principle prototype is shown in fig. 4 and is compared with fig. 3, so that the root mean square value and the peak value are greatly improved.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention in its corresponding aspects.
Claims (6)
1. The utility model provides an experience formula teaching is with collision vibration energy collection system, includes the piezoelectricity cantilever beam, the one end of piezoelectricity cantilever beam is stiff end, its characterized in that: the other end of the piezoelectric cantilever beam is provided with a passive vibration excitation device; the passive vibration excitation device consists of a sleeve (4) and a collision mass block (5), wherein the collision mass block (5) is arranged in the sleeve (4); or the passive vibration excitation device is any one of the following vibration input sources: a vibration source exciting device consisting of compression springs, a vibration source exciting device consisting of extension springs, a reciprocating motion exciting device driven by a motor, and a vibration source device with magnetism mutual exclusion or mutual attraction.
2. The experimental teaching collision vibration energy harvesting device of claim 1, wherein: one end of the piezoelectric cantilever beam, which is provided with the passive vibration exciting device, is a free end.
3. The experimental teaching collision vibration energy harvesting device of claim 1, wherein: the piezoelectric cantilever beam is composed of a thin plate (3) and a piezoelectric film (2), one end of the piezoelectric cantilever beam is fixed on the base (1), the other end of the piezoelectric cantilever beam is a free end, and the passive vibration exciting device is arranged above the free end.
4. The experimental teaching collision vibration energy harvesting device of claim 1, wherein: the fixed end of the piezoelectric cantilever beam is provided with a base (1).
5. The experimental teaching collision vibration energy harvesting device of claim 1, wherein: the collision mass block (5) is a steel ball.
6. The experimental teaching collision vibration energy harvesting device of claim 3, wherein: the thin plate (3) is made of FR-4 material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922423269.1U CN211266795U (en) | 2019-12-30 | 2019-12-30 | Experience formula teaching is with collision vibration energy collection system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922423269.1U CN211266795U (en) | 2019-12-30 | 2019-12-30 | Experience formula teaching is with collision vibration energy collection system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211266795U true CN211266795U (en) | 2020-08-14 |
Family
ID=71960542
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922423269.1U Active CN211266795U (en) | 2019-12-30 | 2019-12-30 | Experience formula teaching is with collision vibration energy collection system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211266795U (en) |
-
2019
- 2019-12-30 CN CN201922423269.1U patent/CN211266795U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102217184B (en) | A device for maximum detection of vibrating energy for harvesting energy | |
| US20100283264A1 (en) | Impact Powered Devices | |
| CN102801360B (en) | Disk cam excited and limited high-power rotary piezoelectric wind generator | |
| CN110912459A (en) | Experience formula teaching is with collision vibration energy collection system | |
| CN108045181A (en) | Free movement without battery car tire-pressure monitoring transmitter in tire | |
| CN104242725A (en) | Two-level vibrating type broadband energy harvester | |
| Abdal et al. | Piezoelectric pre-stressed bending mechanism for impact-driven energy harvester | |
| CN102820807A (en) | High-power rotary type piezoelectric wind driven generator excited and limited by end cam | |
| CN104617815B (en) | Piezoelectricity electric power facility collecting wind energy | |
| Asry et al. | Power generation by using piezoelectric transducer with bending mechanism support | |
| CN205391629U (en) | Motion electricity generation racket | |
| CN211266795U (en) | Experience formula teaching is with collision vibration energy collection system | |
| Tsuruta et al. | Experimental evaluation of a cruciform piezoelectric energy harvester | |
| CN208797810U (en) | A kind of combined type Wave energy collecting device | |
| Bianconi et al. | A hybrid piezoelectric and inductive rotational energy harvester | |
| CN204408216U (en) | A kind of piezoelectric generating device gathering wind energy | |
| CN117189452A (en) | Multi-degree-of-freedom wave energy power generation device and equipment | |
| Nawir et al. | A review on piezoelectric energy harvester and its power conditioning circuit | |
| Abdal-Kadhim et al. | Piezoelectric impact-driven energy harvester | |
| CN102594201A (en) | Vibration energy recovery device | |
| CN211578135U (en) | Experience formula is horizontal collision vibration energy collection system for teaching | |
| CN213402851U (en) | Miniature power generation device utilizing impact vibration | |
| CN205423074U (en) | Spring oscillator type wind -force piezoelectric power generating device | |
| CN210780601U (en) | Liquid energy collecting device | |
| CN207603479U (en) | A kind of vibrational energy collector |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |