CN204886744U - Pontoon bridge monitoring system is from maintaining round sheet metal formula piezoelectricity power generation facility - Google Patents
Pontoon bridge monitoring system is from maintaining round sheet metal formula piezoelectricity power generation facility Download PDFInfo
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- CN204886744U CN204886744U CN201520642638.5U CN201520642638U CN204886744U CN 204886744 U CN204886744 U CN 204886744U CN 201520642638 U CN201520642638 U CN 201520642638U CN 204886744 U CN204886744 U CN 204886744U
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Abstract
The utility model relates to a pontoon bridge monitoring system is from maintaining round sheet metal formula piezoelectricity power generation facility (b), including airtight shell, the shell is opened near the inner wall of bottom has two recesses, and two piezoelectricity circle sheet metals are fixed inside these two recesses with a letter support mode, and the electrode parallel connection of two piezoelectricity circle sheet metals is in the same place to be connected with the output electrode who sets up on the shell respectively, the center pin department of piezoelectricity circle sheet metal still is provided with mechanical energy and collects and transfer device. The utility model provides high collection efficiency to outside mechanical energy has finally lengthened the power supply time who keeps round sheet metal formula piezoelectricity power generation facility certainly at to a great extent.
Description
Technical field
The utility model relates to piezoelectric Conversion of Energy and collection technique field, and pontoon bridge monitoring system that particularly relate to a kind of high-mechanic, that effectively can collect low-frequency vibration energy and impact energy is from maintaining circle thin board type piezoelectric generating device.
Background technology
Pontoon bridge is a complicated large scale structure, and carrying out monitoring to its state such as health status, degree of impairment needs to arrange large measuring point.Power and the signal acquisition behavior communicated, by the additional weight of can not ignore to pontoon bridge increase as adopted traditional wire.Utilize wireless sensor network to carry out distributed monitoring on a large scale to pontoon structure, will greatly strengthen reliability and the actual effect of monitoring system.Wireless senser is the element of sensor network, because its volume is small, the self-contained energy content of battery is limited, and wireless senser has the features such as quantity is many, distributed areas are wide, deployed environment is complicated, and the mode be difficult to by changing battery obtains energy.And chemical cell long term storage performance is poor, particularly at a lower temperature, the chemical reaction of chemical cell inside often can not occur or occur not exclusively, thus causes cisco unity malfunction.Visible, traditional supply power mode has become a key factor of restriction wireless sensor network technology development gradually, and novel power supply technique research is imperative.
Because wireless senser is main in pontoon bridge operational environment, what exist is the mechanical energy such as low-frequency vibration, discontinuous impact energy, and piezoelectric can utilize the direct piezoelectric effect of itself directly mechanical energy to be converted to electric energy, so piezoelectric can be designed to piezoelectric generating device is that wireless senser is powered.Meanwhile, piezoelectric generating device has the features such as rate of activation is fast, environmental suitability strong, long term storage performance is good, structure simply, easily realizes miniaturization, with low cost, visible, and piezoelectric generating device is suitable as special physical power source and uses very much.In recent years, piezo-electric generating technology, due to the advantage of himself, presents wide application potential in embedded MEMS, collection environmental energy etc.And develop the significantly lifting of especially piezoelectric piezoelectric modulus along with material technology, and the extensive use of Micro Energy Lose electronic devices and components, make the design and evaluation of piezoelectric generating device become a hot research direction gradually.
But the existing piezoelectric generating device shortcomings such as still ubiquity energy output is little, power-on time is short, cause the ability being difficult to really realize its continued power.Analyzing main cause is because the electromechanical conversion efficiency of its generator unit PZT (piezoelectric transducer) is limited, and the generation mode of existing piezoelectric generating device produces electric energy by the disposable PZT (piezoelectric transducer) that acts on of exterior mechanical load to make it, the instantaneity of external load adds the difficulty of PZT (piezoelectric transducer) data-collection and electricity collection management, thus reduce further the data-collection ability of piezoelectric generating device.For making up above deficiency, need to design new structure, so that the transient impact of external load can be converted to sustained vibration energy, to extend the action time of external load to PZT (piezoelectric transducer).
Utility model content
The technical problems to be solved in the utility model is to provide a kind of pontoon bridge monitoring system from maintaining circle thin board type piezoelectric generating device, can realize the demand of continued power.
In order to solve the problems of the technologies described above, the utility model comprises sealing shell, the inwall of described shell near bottom has two grooves, two pieces of piezoelectricity circle thin plates are fixed on this two inside grooves with freely-supported supporting way, the electrode of two pieces of piezoelectricity circle thin plates is connected in parallel, and be connected with the output electrode be arranged on shell respectively, the central axis of described piezoelectricity circle thin plate is also provided with mechanical energy and collects and transfer device.
Described mechanical energy is collected and transfer device to comprise by the extension platform being arranged on enclosure two ends between spring, the two ends of described spring are separately fixed at the surface of enclosure two ends extension platform, described spring is also fixedly connected with mass, and described mass upper and lower two ends middle position is embedded with excitation connecting rod.
The utility model adds with spring mass block assembly on the basis of conventional piezoelectric transducers to be core mechanical energy is collected and transmission mechanism, the exterior mechanical load transfer existed in operational environment can be the vibrational energy of the maintenance certainly form of spring mass block assembly by it, thus make spring mass block assembly implement repeat actuation to PZT (piezoelectric transducer), thus extend the lasting effect of mechanical load and the corresponding PZT (piezoelectric transducer) that extends maintains time of data-collection, improve the collection efficiency to external mechanical energy, the final power-on time extended to a great extent from maintaining circle thin board type piezoelectric generating device.
Accompanying drawing explanation
Fig. 1 is from maintaining circle thin board type piezoelectric generating device structure chart;
Fig. 2 is spring mass block assembly cutaway view;
Fig. 3 mass assembly assumption diagram;
Fig. 4 is spring cutaway view;
Fig. 5 is piezoelectricity circle thin-slab structure figure;
Fig. 6 is piezoelectricity circle thin plate supporting way schematic diagram.
Embodiment
Embodiment cited by the utility model; just understand the utility model for helping; should not be construed as the restriction to the utility model protection range; for those skilled in the art; under the prerequisite not departing from the utility model thought; can also improve the utility model and modify, these improve and modification also falls in the scope of the utility model claim protection.
As shown in Figure 1, the utility model comprises and forms cylindrical shape sealing shell 1 by upper shell and lower casing by screwing affixed mode, the inwall of described upper and lower shell near bottom has groove 1-1, and two pieces of piezoelectricity circle thin plates 4 are fixed on this two groove 1-1 inside with freely-supported supporting way.The electrode of two piezoelectricity circle thin plates 4 is connected in parallel, and is connected with the output electrode be arranged on shell respectively, and the central axis of described piezoelectricity circle thin plate 4 is also provided with mechanical energy and collects and transfer device.As preferred embodiment of the present utility model, described mechanical energy is collected and transfer device comprises by the spring 3 be arranged between enclosure extension platform 1-2, the two ends of described spring 3 are separately fixed at the surface of upper and lower enclosure extension platform 1-2, to ensure that spring does not loosen when axis direction does free vibration.In order to better collect outside energy, described spring 2 is also fixedly connected with mass 2, and embeds excitation connecting rod 2-1 at mass about 2 two ends middle position, jointly forms spring mass block assembly 5 as shown in Figure 2.
Extension platform 1-2 and spring 3 end open same size circular hole, matched in clearance between shell 1 inwall and spring 3 outer wall, to prevent spring mass block assembly 5 from occurring transverse vibration or dancing during operation, guarantee that spring moves along the axis direction of shell.Spring mass block assembly 5 is utilized external energy to be converted to the mechanical energy of vibration mode from maintaining circle thin board type piezoelectric generating device, in the vibration processes of spring mass block assembly 5, repeated collision is there is in excitation connecting rod 5-1 by with corresponding piezoelectricity circle thin plate 4, thus encouraging each piezoelectricity circle thin plate 4 to produce forced vibration, piezoelectricity circle thin plate 4 exports because the piezoelectric effect of itself produces the electric energy continued in vibration processes.Wherein, the effect of mass 2 justifies the load effect of thin plate 4 and the equivalent mass of adjustment spring mass block assembly 5 in order to strengthen to piezoelectricity.The key element that 3, spring is spring mass block assembly 5 and realizes expectation function, its parameter is even more important also comparatively complicated.When carrying out spring parameter calculating; generally provide maximum working load and corresponding deformation quantity; but need the vibration matched design carrying out spring mass block assembly 5 and piezoelectricity circle thin plate 4 in the utility model; so stiffness coefficient and the largest deformation amount (when spring bore load, restraining spring was out of shape by protection mechanism in structural design further) of spring 3 first must be determined.Protection mechanism method for designing is, in the enclosure (mass 2 outer wall central flange 2-4 correspondence position) recessing 1-3 in the middle part of wall, with the peak swing of restraining spring-mass assembly 5, thus encourages connecting rod 2-1 to be punctured by piezoelectricity circle thin plate 4 under preventing overload.Visible, spring mass block assembly 5 realizes the important mechanism from maintaining supplied character, and it designs the performance index having influence on this Blast Furnace Top Gas Recovery Turbine Unit (TRT) to a great extent.
As shown in Figure 3 and Figure 4, spring 3 is made up of upper spring 3-1 and lower spring 3-2, upper spring 3-1 upper surface 3-3 has aperture, hole diameter is greater than on mass 2 and embeds fixing excitation connecting rod 2-1 diameter, can freely stretch out to make excitation connecting rod 2-1, upper spring 3-1 empties into cylinder tubbiness in inside, and mass 2 upper cylinder 2-2 is nested in wherein, and cylinder 2-2 radius is slightly less than spring inside diameter.The boss 2-3 upper surface of mass 2 and the upper surface of upper spring 3-1 lower grooves 3-4 affixed, boss 2-3 outer wall and groove 3-4 inwall affixed, and highly identical.Connection design and the upper spring 3-1 of lower spring 3-2 and mass 2 are similar.Mass 2 middle part arranges flange 2-4, matched in clearance between flange 2-4 outer wall and shell 1 central slot 1-3 inwall, to guarantee that mass 2 moves along the axis direction of shell 1.The gap of described flange 2-4 above and below and groove 1-3 above and below determines the maximum deformation quantity that spring 3 compresses or stretches, and namely limits the peak swing of spring mass block assembly 5.Visible, spring 3 and piezoelectricity circle thin plate 4 all obtain overload protection by this method for designing.
As shown in Figure 5, piezoelectricity circle thin plate 4 is bonded together by piezoelectric ceramic circle sheet 4-1 and metal substrate 4-2 and forms, piezoelectric ceramic 4-1 and metal substrate 4-2 axes coincide.In the middle of engineer applied, piezoelectricity circle thin plate generally comprises periphery fixed support and simple supported edge supports two kinds of modes, as can be seen from Fig. 6, when piezoelectricity circle thin plate works under freely-supported mode, its outer surface is outside extended configuration, at this moment produces like charges in similar face.And when working under clamped mode, the circle same surface of thin plate has been divided into compressional zone and stretching area, the character that the electric charge that compressional zone produces and stretching area produce electric charge has been cancelled out each other mutually on the contrary.Therefore, the generating capacity of piezoelectricity circle thin plate under freely-supported mode is more superior, so adopt freely-supported supporting way that two piezoelectricity circle thin plates 4 are separately fixed at upper and lower shell in the groove 1-1 of bottom.Connected by conductor in parallel between two piezoelectricity circle thin plates 4, this structure has significantly improved the electromechanical conversion efficiency of PZT (piezoelectric transducer), and has larger capacitance due to parallel connected array, further improves electric energy fan-out capability.
Because piezoelectric ceramic is more fragile, when installing, metal substrate 4-2 mono-side of piezoelectricity circle thin plate 4 is rushed at excitation connecting rod 2-1, make spring mass block assembly 5 in vibration processes, excitation connecting rod 2-1 end and metal substrate 4-2 center collide, and make piezoelectricity circle thin plate 4 produce forced vibration.In actual applications, realize the vibrational excitation of connecting rod 2-1 to piezoelectricity circle thin plate 4 by physical shock mode, not only conversion efficiency is not high, but also very easily causes contact portion to wear and tear.So in order to enable whole system more effectively and the practical function of safety, the end of excitation connecting rod 2-1 can be replaced with strong magnets, the same magnet of a Magnetic Phase is installed in metal substrate 4-2 center simultaneously, make excitation connecting rod 2-1 when close to metal substrate 4-2 center, piezoelectricity circle thin plate 4 can be forced to deform and produce vibration.
Introduce lower operation principle of the present utility model below:
With the key monitoring point being arranged on pontoon bridge from the wireless senser maintaining circle thin board type piezoelectric generating device, pontoon bridge erection, logical carry and remove in receipts process all will produce the mechanical energies such as discontinuous impact, low-frequency vibration in wireless senser operational environment.Under mechanical load function, under outside mechanical load function, move to maximum displacement place from the spring mass block assembly maintained in piezoelectricity circle thin-slab structure rapidly.Now, excitation connecting rod will first to piezoelectricity circle thin plate imposed load (clashing into the metal substrate of piezoelectricity circle thin plate), piezoelectricity circle thin plate produces forced vibration immediately, and mechanical energy is converted to electric energy and undertaken storing or powering by electricity collection and management circuit due to the piezoelectric effect first time of self, achieve the quick active of this piezoelectric generating device; A part of external energy is saved as elastic potential energy by spring mass block assembly simultaneously, spring mass block assembly is by free vibration subsequently, excitation connecting rod is caused to apply repeated load to piezoelectricity circle thin plate further, before the stop motion of spring mass block assembly, piezoelectricity circle thin plate then produces lasting electric energy and exports by collecting this part vibrational energy.
In addition, piezoelectricity circle thin plate self can produce regular vibration, when spring mass block assembly natural frequency and circle thin plate vibration frequency close to time, will there is maximum in its amplitude, can improve integrally-built output electric energy.So also needing to consider vibration matching properties from maintaining in the design of piezoelectricity circle thin-slab structure, to meet the resonance condition of spring mass block assembly and piezoelectricity circle thin plate, thus maximize the generating capacity improving this piezoelectric generating device.Visible, pass through said method, from maintenance piezoelectricity circle thin-slab structure, the exterior mechanical in pontoon bridge operational environment can be converted to spring potential energy, in spring mass block assembly vibration processes, produce alternation effect and progressively load to piezoelectricity circle thin plate, instead of acting on disposable for external load on PZT (piezoelectric transducer).Therefore, the action time of exterior mechanical load to piezoelectricity circle thin plate effectively can be extended from maintaining circle thin plate piezoelectric generating device, thus to extend piezoelectricity circle thin plate be the time of electric energy by changes mechanical energy, and finally extend the continued power time of this piezoelectric generating device.
Claims (2)
1. pontoon bridge monitoring system is from maintaining circle thin board type piezoelectric generating device, it is characterized in that, comprise sealing shell (1), the inwall of described shell (1) near bottom has two grooves (1-1), two pieces of piezoelectricity circle thin plate (4) are fixed on this two grooves (1-1) inside with freely-supported supporting way, the electrode of two pieces of piezoelectricity circle thin plate (4) is connected in parallel, and be connected with the output electrode be arranged on shell respectively, the central axis of described piezoelectricity circle thin plate (4) is also provided with mechanical energy and collects and transfer device.
2. pontoon bridge monitoring system maintains circle thin board type piezoelectric generating device certainly according to claim 1, it is characterized in that, described mechanical energy is collected and transfer device to comprise by the extension platform being arranged on enclosure two ends (1-2) between spring (3), the two ends of described spring (3) are separately fixed at the surface at enclosure two ends extension platform (1-2), described spring (2) is also fixedly connected with mass (2), and described mass (2) up and down two ends middle position is embedded with excitation connecting rod (2-1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520642638.5U CN204886744U (en) | 2015-08-24 | 2015-08-24 | Pontoon bridge monitoring system is from maintaining round sheet metal formula piezoelectricity power generation facility |
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| CN201520642638.5U CN204886744U (en) | 2015-08-24 | 2015-08-24 | Pontoon bridge monitoring system is from maintaining round sheet metal formula piezoelectricity power generation facility |
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| CN204886744U true CN204886744U (en) | 2015-12-16 |
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| CN201520642638.5U Expired - Fee Related CN204886744U (en) | 2015-08-24 | 2015-08-24 | Pontoon bridge monitoring system is from maintaining round sheet metal formula piezoelectricity power generation facility |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110739178A (en) * | 2019-09-16 | 2020-01-31 | 北京空间机电研究所 | acceleration switch with single mass block of double springs |
| CN114283562A (en) * | 2021-12-08 | 2022-04-05 | 江苏科技大学 | Early warning system and early warning method for offshore trestle |
-
2015
- 2015-08-24 CN CN201520642638.5U patent/CN204886744U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110739178A (en) * | 2019-09-16 | 2020-01-31 | 北京空间机电研究所 | acceleration switch with single mass block of double springs |
| CN110739178B (en) * | 2019-09-16 | 2022-07-29 | 北京空间机电研究所 | Double-spring single-mass acceleration switch |
| CN114283562A (en) * | 2021-12-08 | 2022-04-05 | 江苏科技大学 | Early warning system and early warning method for offshore trestle |
| CN114283562B (en) * | 2021-12-08 | 2023-12-22 | 江苏科技大学 | Marine trestle early warning system and early warning method thereof |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20151216 Termination date: 20200824 |
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| CF01 | Termination of patent right due to non-payment of annual fee |