CN204271949U - Pontoon bridge monitoring system is from maintaining cantilever piezoelectric power supply - Google Patents
Pontoon bridge monitoring system is from maintaining cantilever piezoelectric power supply Download PDFInfo
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- CN204271949U CN204271949U CN201420562161.5U CN201420562161U CN204271949U CN 204271949 U CN204271949 U CN 204271949U CN 201420562161 U CN201420562161 U CN 201420562161U CN 204271949 U CN204271949 U CN 204271949U
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Abstract
The utility model relates to technical field of electric power, and especially a kind of pontoon bridge monitoring system is from maintaining cantilever piezoelectric power supply.Comprise cylindrical shape sealing shell, on the inwall of described shell, spacing has some grooves, piezoelectric cantilever beam array is provided with in described groove, the electrode of described piezoelectric cantilever beam array is in parallel, be connected with the output electrode be arranged on shell respectively, the central axis of described piezoelectric cantilever beam array is also provided with mechanical energy and collects and transfer device.Originally can be the vibrational energy of the maintenance certainly form of spring-mass block assembly by the exterior mechanical load transfer existed in operational environment, 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 of external mechanical energy.
Description
Technical field
The utility model relates to technical field of electric power, and especially a kind of pontoon bridge monitoring system is from maintaining cantilever piezoelectric power supply.
Background technology
For ensureing the reliability and security of pontoon structure, need to carry out Real-Time Monitoring to its health status, degree of impairment etc.Because pontoon bridge is a complicated large scale structure, status monitoring is carried out to it and need arrange large measuring point.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 power supplies is that wireless senser is powered.Meanwhile, piezoelectric power supplies 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 power supplies 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 power supplies become a hot research direction gradually.
But the existing piezoelectric power supplies 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 power supplies 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 power supplies.
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 cantilever piezoelectric power supply, meets pontoon bridge monitoring system power demands.
In order to solve the problems of the technologies described above, the utility model comprises cylindrical shape sealing shell, on the inwall of described shell, spacing has some grooves, piezoelectric cantilever beam array is provided with in described groove, the electrode of described piezoelectric cantilever beam array is in parallel, be connected with the output electrode be arranged on shell respectively, the central axis of described piezoelectric cantilever beam array 5 is also provided with mechanical energy and collects and transfer device.
Described mechanical energy is collected and is comprised setting spring in the enclosure with transfer device, and the two ends of described spring are separately fixed at two ends in shell, and described spring is also fixedly connected with mass, and described mass outer wall interval is fixed with excitation annulus.
Described outer casing inner wall centre inwardly stretches and is provided with boss, matched in clearance between described boss and mass central slot outer wall.
During piezoelectric cantilever work, its one end is fixed, and utilizes the flexural vibrations of free end to realize the conversion of mechanical energy to electric energy.Acquisition due to electric energy is converted by the strain energy of ceramic material inside, do not have larger strain input, be also difficult to excite more electric charge.And external drive acts on piezoelectric cantilever, this mode can produce larger amount of deflection, increases the mechanical deformation amount that piezoelectric layer produces, therefore, it is possible to the electric energy output that performance is higher.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 extend the lasting effect of mechanical load and the corresponding PZT (piezoelectric transducer) that extends maintains time of data-collection, improve the collection efficiency of external mechanical energy.Devise piezoelectric cantilever array structure to improve the electromechanical conversion efficiency of generator unit further simultaneously, finally extend the power-on time of piezoelectric power supplies to a great extent.
In addition, piezoelectric cantilever self can produce regular vibration, when spring-mass block assembly natural frequency and cantilever beam vibration frequency close to time, will there is maximum in its amplitude, can improve integrally-built output electric energy.Also needing to consider vibration matching properties from maintaining in Piezoelectric Cantilever Beams design, to meet the resonance condition of spring-mass block assembly and cantilever array, thus maximize the generating capacity improving this piezoelectric power supplies.
Accompanying drawing explanation
Fig. 1 is from maintaining cantilever piezoelectric power supply architecture figure;
Fig. 2 is spring-mass block assembly cutaway view;
Fig. 3 is spring-mass block assembly structure chart;
Fig. 4 is from maintaining Piezoelectric Cantilever Beams figure;
Fig. 5 is piezoelectric cantilever array junctions composition;
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 cylindrical shape sealing shell 1, and the inwall of described shell 1 has some grooves 11 from top to bottom according to proportional spacing, and piezoelectric cantilever beam array 5 is fixed on these inside grooves.The electrode of all piezoelectric cantilever beam arrays 5 is connected in parallel, and is connected with the output electrode be arranged on shell 1 respectively, and the central axis of described piezoelectric cantilever beam array 5 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 is comprised with transfer device the spring 2 being arranged on lower bottom part on shell 1, the two ends of described spring 2 embed respectively be fixed on lower bottom part on shell 1 circular groove in.In order to better collect outside energy, described spring 2 is also fixedly connected with mass 3, and at the even stationary arrangement of mass 3 outer wall one group excitation annulus 4, forms spring-mass block assembly 6.Shell 1 inwall centre inwardly stretches and is provided with boss 12, matched in clearance between described boss 12 and mass central slot outer wall, to prevent spring-mass block assembly from occurring transverse vibration or dancing during operation, guarantee that spring moves along the axis direction of shell.From maintenance cantilever piezoelectric power utilization spring-mass block assembly 6, external energy is converted to the mechanical energy of vibration mode, in the vibration processes of spring-mass block assembly 6, excitation annulus 4 collides with corresponding piezoelectric cantilever beam array 5, thus encouraging each monolithic cantilever beam 53 to produce consistent vibration, piezoelectric cantilever beam array 5 exports because the piezoelectric effect of itself produces the electric energy continued in vibration processes.Wherein, the effect of mass 4 is the equivalent masss in order to strengthen the load effect of piezoelectric cantilever beam array 5 and adjustment spring-mass block assembly 6.3, spring is the key element that spring-mass block 6 assembly realizes expectation function, and 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 matched design carrying out spring-mass block assembly 6 and piezoelectric cantilever beam array 5 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.Visible, spring-mass block assembly 6 realizes the important mechanism from maintaining supplied character, and it designs the performance index having influence on this power generating source to a great extent.
As shown in Figures 2 and 3, spring 2 top 23 is sealing surface, bottom 24 has groove, for the ease of being fixedly connected with of spring 2 and mass 3, cylinder barrel-like structure is drawn in the inside of described mass 3, bottom spring 2,24 are inserted in mass 3 inside, and matched in clearance between interior cylindrical outer wall 31 and spring inwall, to guarantee that spring moves along the axis direction of shell.The groove floor 25 of spring 2 tightens together with mass 3 internal boss 32.Described spring 2 comprises first module spring 21 and second unit spring 22, described first module spring 21 and second unit spring 22 symmetrical, be fixed together with mass 3 in the manner described above respectively.In order to limit the peak swing of spring-mass block assembly 6, thus prevent overload lower piezoelectric cantilever array 5 to be damaged, groove 33 is outputed at described mass 3 outer wall mid portion, the spacing of groove 33 upper and lower surface determines the total deformation that spring 3 compresses or stretches, with the deformation range of restraining spring 3, prevent from being damaged in stretching, compression process.Mass 3 outer wall evenly has notch 34, and excitation annulus 4 inwall 41 embeds and is fixed in notch 34, according to the outstanding tip 42 of proportional spacing processing outside excitation annulus 4.
As shown in Figure 4, the quantity of excitation annulus 4 tip 42 is identical with the quantity of monomer piezoelectric cantilever 53 in piezoelectric cantilever beam array 5, arrangement position one_to_one corresponding.Spring-mass block assembly 6 is in vibration processes, and each tip 42 front end collides with corresponding monomer piezoelectric cantilever 53 tip, makes piezoelectric cantilever beam array 5 produce consistent vibration.In actual applications, realized the vibrational excitation of tip 42 pairs of piezoelectric cantilevers 53 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, can strong magnets be utilized to replace the outstanding tip 42 of excitation annulus 4, at piezoelectric cantilever 53 tip place, the contrary magnet of a magnetic is installed simultaneously.Above-mentioned two magnet, as far as possible close to the other side, with the attraction between strengthening, thus improve arousal effect.
As shown in Figure 5, beat rectangular opening 51 at the inwall of substrate annulus 52 by proportional spacing, monomer piezoelectric cantilever 53 is embedded respectively and is fixed in these rectangular openings 51, require that substrate annulus 52 tightly clamps piezoelectric cantilever 53, just constitute piezoelectric cantilever beam array 5.Single piezoelectric cantilever 53 is connected in parallel on electrically, is connected between piezoelectric cantilever beam array 5 by conductor in parallel.This structure has been multiplied the total quantity of parallel piezoelectric cantilever beam, significantly improves the electromechanical conversion efficiency of PZT (piezoelectric transducer), also improves anti-overload ability simultaneously, because parallel connected array has larger capacitance, further improve electric energy fan-out capability.
Introduce lower operation principle of the present utility model below:
With the key monitoring point being arranged on pontoon bridge or other equipments from the wireless senser maintaining cantilever piezoelectric power supply, 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 Piezoelectric Cantilever Beams rapidly.Now, excitation annulus will first to piezoelectric cantilever beam array imposed load, mechanical energy is then converted to electric energy due to piezoelectric effect and is undertaken storing or powering by electricity collection and management circuit by piezoelectric cantilever beam array for the first time, achieves the quick active of this piezoelectric power supplies; 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 annulus is caused to apply repeated load to piezoelectric cantilever beam array further, before the stop motion of spring-mass block assembly, piezoelectric cantilever beam array then produces lasting electric energy and exports by collecting this part vibrational energy.
Pass through said method, from maintenance Piezoelectric Cantilever Beams, 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 progressively load to piezoelectric cantilever beam array, instead of act on disposable for external load on piezo-electric generating unit.Can extend the action time of exterior mechanical load to piezoelectric cantilever beam array from maintaining cantilever beam piezoelectric power supplies as seen, namely extending piezoelectric cantilever beam array by changes mechanical energy is the time of electric energy, and finally extends the continued power time of power supply.
Claims (3)
1. pontoon bridge monitoring system is from maintaining cantilever piezoelectric power supply, comprise cylindrical shape sealing shell (1), it is characterized in that, on the inwall of described shell (1), spacing has some grooves (11), piezoelectric cantilever beam array (5) is provided with in described groove (11), the electrode of described piezoelectric cantilever beam array (5) is in parallel, is connected respectively with the output electrode be arranged on shell, and the central axis of described piezoelectric cantilever beam array (5) is also provided with mechanical energy and collects and transfer device.
2. pontoon bridge monitoring system according to claim 1 is from maintaining cantilever piezoelectric power supply, it is characterized in that, described mechanical energy is collected and is comprised with transfer device the spring (2) be arranged in shell (1), the two ends of described spring (2) are separately fixed at shell (1) interior two ends, described spring (2) is also fixedly connected with mass (3), and described mass (3) outer wall interval is fixed with excitation annulus (4).
3. pontoon bridge monitoring system according to claim 2 is from maintaining cantilever piezoelectric power supply, it is characterized in that, described shell (1) inwall centre inwardly stretches and is provided with boss (12), matched in clearance between described boss (12) and mass central slot outer wall.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420562161.5U CN204271949U (en) | 2014-09-26 | 2014-09-26 | Pontoon bridge monitoring system is from maintaining cantilever piezoelectric power supply |
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| CN201420562161.5U CN204271949U (en) | 2014-09-26 | 2014-09-26 | Pontoon bridge monitoring system is from maintaining cantilever piezoelectric power supply |
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| CN204271949U true CN204271949U (en) | 2015-04-15 |
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| CN201420562161.5U Expired - Fee Related CN204271949U (en) | 2014-09-26 | 2014-09-26 | Pontoon bridge monitoring system is from maintaining cantilever piezoelectric power supply |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106169889A (en) * | 2016-07-18 | 2016-11-30 | 河海大学常州校区 | The mechanical energy retracting device on road surface and method of work thereof |
| CN106685264A (en) * | 2016-12-20 | 2017-05-17 | 南京信息工程大学 | Piezoelectric energy recovery device for pipeline vibration energy harvesting |
| CN106787944A (en) * | 2017-02-27 | 2017-05-31 | 河海大学 | A kind of piezoelectric transducer |
| CN107592030A (en) * | 2017-10-09 | 2018-01-16 | 浙江海洋大学 | A piezoelectric power generation device utilizing wave energy |
| CN109348386A (en) * | 2018-11-30 | 2019-02-15 | 深圳精拓创新科技有限公司 | Driving device and electronic building brick |
| CN112117932A (en) * | 2020-09-02 | 2020-12-22 | 广州大学 | Power generation device and health monitoring equipment using same |
| CN112332707A (en) * | 2020-11-24 | 2021-02-05 | 重庆大学 | Miniature power generation device utilizing impact vibration |
| CN112781699A (en) * | 2020-12-28 | 2021-05-11 | 杭州电子科技大学 | Dynamic weighing device based on multi-cantilever structure and weighing method thereof |
-
2014
- 2014-09-26 CN CN201420562161.5U patent/CN204271949U/en not_active Expired - Fee Related
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106169889A (en) * | 2016-07-18 | 2016-11-30 | 河海大学常州校区 | The mechanical energy retracting device on road surface and method of work thereof |
| CN106169889B (en) * | 2016-07-18 | 2017-12-19 | 河海大学常州校区 | The mechanical energy retracting device and its method of work on road surface |
| CN106685264B (en) * | 2016-12-20 | 2018-07-31 | 南京信息工程大学 | Piezoelectric energy recovery device for pipe vibration collection of energy |
| CN106685264A (en) * | 2016-12-20 | 2017-05-17 | 南京信息工程大学 | Piezoelectric energy recovery device for pipeline vibration energy harvesting |
| CN106787944B (en) * | 2017-02-27 | 2018-08-28 | 河海大学 | A kind of piezoelectric transducer |
| CN106787944A (en) * | 2017-02-27 | 2017-05-31 | 河海大学 | A kind of piezoelectric transducer |
| CN107592030A (en) * | 2017-10-09 | 2018-01-16 | 浙江海洋大学 | A piezoelectric power generation device utilizing wave energy |
| CN109348386A (en) * | 2018-11-30 | 2019-02-15 | 深圳精拓创新科技有限公司 | Driving device and electronic building brick |
| CN109348386B (en) * | 2018-11-30 | 2024-02-23 | 深圳精拓创新科技有限公司 | Driving device and electronic component |
| CN112117932A (en) * | 2020-09-02 | 2020-12-22 | 广州大学 | Power generation device and health monitoring equipment using same |
| CN112332707A (en) * | 2020-11-24 | 2021-02-05 | 重庆大学 | Miniature power generation device utilizing impact vibration |
| CN112332707B (en) * | 2020-11-24 | 2024-03-22 | 重庆大学 | Miniature power generation device utilizing impact vibration |
| CN112781699A (en) * | 2020-12-28 | 2021-05-11 | 杭州电子科技大学 | Dynamic weighing device based on multi-cantilever structure and weighing method thereof |
| CN112781699B (en) * | 2020-12-28 | 2022-05-17 | 杭州电子科技大学 | A kind of dynamic weighing device and weighing method based on multi-cantilever beam structure |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150415 Termination date: 20200926 |
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| CF01 | Termination of patent right due to non-payment of annual fee |