CN115655453A - Novel broadband and impact-resistant tension vibration acceleration sensor and use method thereof - Google Patents
Novel broadband and impact-resistant tension vibration acceleration sensor and use method thereof Download PDFInfo
- Publication number
- CN115655453A CN115655453A CN202211321669.1A CN202211321669A CN115655453A CN 115655453 A CN115655453 A CN 115655453A CN 202211321669 A CN202211321669 A CN 202211321669A CN 115655453 A CN115655453 A CN 115655453A
- Authority
- CN
- China
- Prior art keywords
- gear
- impact
- acceleration sensor
- synchronous belt
- vibration acceleration
- 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.)
- Granted
Links
Images
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
Abstract
The invention relates to the technical field of sensors, in particular to a novel broadband and impact-resistant tension vibration acceleration sensor and a using method thereof, wherein the novel broadband and impact-resistant tension vibration acceleration sensor comprises a basic framework, a prestress adjusting module and a triboelectric friction block, wherein the basic framework is positioned in a shell and comprises a top mass block, a substrate, four outer chords and four inner chords; the prestress adjusting module comprises a bolt, a gear nut and a synchronous belt; the triboelectric friction block comprises two friction electrodes; two friction electrodes are respectively attached to the side edge of the top mass block and the inner side of the shell. The invention has double working modes, can better widen the frequency band and has better shock resistance and damage resistance.
Description
Technical Field
The invention relates to the technical field of sensors, in particular to a novel broadband and impact-resistant tension vibration acceleration sensor.
Background
Environmental monitoring is one of important links of the internet of things, and vibration widely exists in the surrounding environment of people and transmits important information, so that the research of vibration sensing is very necessary. Since the vibration in the environment is random and variable, the sensor for monitoring the vibration signal has a limited response frequency band and cannot adapt to the changing environment, such as the shift of the vibration frequency and sudden impact. The search for broadband, shock damage resistant vibration sensors is very challenging.
The natural frequency of the system is related to the stiffness and mass of the system, and mechanical broadening of the frequency band is currently considered to be the most efficient method. The natural frequency of the system can be shifted by adjusting the rigidity of the system and changing the mass of the mass block, so that the effect of widening the frequency is achieved. The implementation by means of changing the mass inevitably increases the size of the whole sensor, limiting the miniaturization of the device, so that it is more practical to widen the frequency band by changing the system stiffness. Many existing sensors need manual adjustment of parameters of the sensors step by step according to changes of environments, and the process is extremely complicated and does not meet actual working requirements. In addition, due to the presence of abrupt factors in the environment, the sensor needs to meet the requirements of resistance to damage and impact. The existing solutions mostly use implanted damping elements and flexible modules, but affect to some extent the response of the system to vibration signals. In summary, it is a challenge to essentially widen the operating band of the device and to provide the sensing device with characteristics of resistance to shock and damage.
Disclosure of Invention
The invention provides a novel broadband and impact-resistant tension vibration acceleration sensor, which can overcome the defect that the inherent frequency of the sensor is changed by continuously and manually adjusting related physical parameters such as the mass of a mass block and the rigidity of an elastic part.
The novel broadband and impact-resistant stretching vibration acceleration sensor comprises a basic framework, a prestress adjusting module and a triboelectric friction block, wherein the basic framework is positioned in a shell and comprises a top mass block, a substrate, four outer strings and four inner strings, two ends of the four inner strings are respectively connected with the top mass block and the substrate, one ends of the four outer strings are connected with the top mass block, and the other ends of the four outer strings are connected with gear nuts;
the prestress adjusting module comprises a bolt, a gear nut and a synchronous belt, the bolt is fixed in the reserved hole of the substrate through glue, and the gear nut is connected with the bolt; the gear nuts are matched with the synchronous belt to synchronously adjust the rotating angle of each gear nut;
the triboelectric friction block comprises two friction electrodes, and one friction electrode comprises a water-assisted oxidized aluminum adhesive tape and a first pet sheet which are sequentially adhered; the other friction electrode comprises a second pet sheet, a copper tape, a pi tape and a ptfe film which are sequentially adhered;
two friction electrodes are respectively attached to the side edge of the top mass block and the inner side of the shell.
Preferably, the top mass block and the base are both processed by 3d printing, and are made of nylon glass fibers and serve as rigid compression parts in the tensioning integral structure; four outer chords and four inner chords are used as tension parts, and the material is ultrahigh molecular weight polyethylene.
Preferably, the bolt is connected with the gear nut, and the gear nut is connected with the synchronous belt through a friction motion amplitude.
Preferably, the four outer strings and the four inner strings are connected with other components through glue.
Preferably, the shell is adhered to the basic skeleton through glue, and the bolt is adhered to the substrate through glue.
Preferably, the number of the gear nuts is four, the gear outlines of the four gear nuts are matched with the synchronous belt, and when an external force couple acts on the synchronous belt, the synchronous belt drives the four gear nuts to synchronously rotate; the synchronous rotation of the four gear nuts enables the four outer strings to extend under the action of tensile force, and the prestress of the four outer strings is ensured to be the same.
The invention also provides a use method of the novel broadband and impact-resistant tensile vibration acceleration sensor, which adopts the novel broadband and impact-resistant tensile vibration acceleration sensor and comprises the following steps:
1. gear synchronous adjustment mode: the synchronous rotation of the gear nuts enables the four outer strings to be stretched under the action of tensile force, so that the prestress of the four outer strings is the same, and the rigidity of the whole sensor can be changed;
2. free gear mode: firstly adjusting a synchronous belt, determining a proper initial frequency, then removing the synchronous belt, fixing three gear nuts by glue, and then rotating the remaining gear nut to a free state.
The invention solves the defect that the natural frequency of the sensor needs to be changed by repeatedly and manually adjusting related physical parameters such as the mass of the mass block, the rigidity of the elastic part and the like in the prior art, and also solves the problem that the vibration sensor is not effective after being impacted by large acceleration. In the synchronous mode, the natural frequency of the sensor can be shifted by adjusting the synchronous belt, and further, the frequency band can be widened. In the free mode, the working frequency band of the sensor can be fundamentally widened without depending on manual adjustment of the bolt each time. In addition, up to 2.7X 10 in application 5 After the impact of g acceleration, the performance of the sensor is not obviously reduced, and good voltage output can still be maintained.
Drawings
FIG. 1 is a schematic structural diagram of a novel broadband, impact-resistant, tensile-vibration-resistant acceleration sensor in an embodiment;
FIG. 2 is a schematic diagram of a top view structure of a novel broadband, impact-resistant, tensile-vibration acceleration sensor according to an embodiment;
FIG. 3 is a schematic diagram of the triboelectric module of an embodiment operating during vibration;
fig. 4 is a schematic diagram of two operation modes of the vibration sensor in the embodiment.
Detailed Description
For a further understanding of the invention, reference should be made to the following detailed description taken in conjunction with the accompanying drawings and examples. It is to be understood that the examples are illustrative of the invention and not limiting.
Examples
As shown in fig. 1 and fig. 2, the novel broadband and impact-resistant tensioned vibration acceleration sensor according to the present embodiment includes a basic framework, a prestress adjusting module and a triboelectric friction block 5, wherein a top mass block 4 and a base 9 are both processed by 3d printing, and are made of nylon glass fiber as a rigid compression part in a tensioned integral structure. Four outer chords 6 and four inner chords 7 are used as tension parts and are made of ultra-high molecular weight polyethylene.
The basic skeleton is positioned in a shell 3 and comprises a top mass block 4, a base 9, four outer strings 6 and four inner strings 7, two ends of the four inner strings 7 are respectively connected with the specified positions of the top mass block 4 and the base 9, one ends of the four outer strings 6 are connected with the top mass block 4, and the other ends of the four outer strings 6 are connected with the center of a gear nut 2;
the prestress adjusting module comprises a bolt 1, a gear nut 2 and a synchronous belt 8, the bolt 1 is fixed in a reserved hole of a substrate 9 through glue, and the gear nut 2 is connected with the bolt 1; the gear nuts 2 and the synchronous belt 8 are matched to synchronously adjust the rotation angle of each gear nut 2;
the triboelectric friction block 5 comprises two friction electrodes, and one friction electrode comprises a water-assisted oxidized aluminum adhesive tape 14 and a first pet sheet which are sequentially adhered; the other friction electrode comprises a second pet sheet 10, a copper adhesive tape 11, a pi adhesive tape 12 and a ptfe (polytetrafluoroethylene) film 13 which are sequentially adhered;
two friction electrodes are respectively attached to the side edge of the top mass block 4 and the inner side of the shell 3.
Preparation of the sensor before operation:
the sensor comprises a basic framework, a prestress adjusting module and a friction electric module 5, and in order to effectively form a tensioning integral structure, the correct connection of each component needs to be ensured, and the stressed state of each component is ensured. Therefore, after the basic skeleton is connected, the synchronous belt 8 needs to be manually adjusted to rotate the gear nut 2, so that the whole structure has initial pre-tightening.
Connections between the various components of the sensor: the bolt 1 is connected with the gear nut 2 and the gear nut 2 are connected with the synchronous belt 8 through friction motion amplitudes, the four outer strings 6 and the four inner strings 7 are connected with other parts through glue, the shell 3 is bonded with the basic framework through glue, and the bolt 1 is bonded with the substrate 9 through glue.
The working principle of the sensor is as follows:
the definition of a tensegrity is: a rigid portion that is only under pressure and cannot be connected to each other and a rope that is only under tension. Research proves that the natural frequency of the tension whole body is related to the tension force applied to the soft string in the system. In addition, the sensor achieves shock resistance, and can be achieved by implanting a buffer element. On this basis, the whole existing function of adjusting natural frequency of stretch-draw has also included the rope as buffering original paper, consequently receives the inspiration of stretch-draw overall structure, can make vibration sensor have broadband and the characteristics of shocking resistance.
The electrical signal of the device is generated by the triboelectric module 5 and is in contact separation type triboelectric mode. The reason for the contact separation is that the mode can reduce the abrasion of the electrode surface and prolong the service life of the sensor. The basic acquisition process of the vibration signal is as follows: the sensor needs to be installed at the vibration source, and the installation posture of the sensor is to conform to the direction of the vibration source, so that the displacement of the top mass block 4 is ensured to be consistent with the direction of the vibration source. The two electrodes of the triboelectric module 5 are respectively installed on the side of the top mass block 4 and the inner side of the housing 3, and the installation process is noticed that the two triboelectric electrodes have the same size and the gap, and the installation positions are completely corresponding to ensure the maximum contact in the working process, in this embodiment, the size of the triboelectric electrode is 15mm × 20mm, and the gap between the two is 1mm. When the vibration passes through the stretched basic skeleton, the vibration is transmitted to the top mass block 4 to make the top mass block reciprocate, so that the two friction electrodes are in a repeated contact separation state. The potential difference between the electrodes is changed continuously, so that electrons move, and are transferred through an external circuit to form current. The principle diagram of triboelectricity generation is shown in fig. 3. In addition, in order to increase the performance of the power generation performance of the aluminum tape, the aluminum tape 14 is subjected to water-assisted oxidation, the surface of the aluminum tape is provided with a microstructure to increase the contact area, and the pi tape 12 is introduced to serve as a power storage layer.
And (3) water-assisted oxidation process: the aluminum tape 14 was washed with acetone and deionized water, and air-dried. Adding deionized water into a beaker, heating to 80 ℃, adding the cleaned aluminum adhesive tape 14, and boiling for 40 minutes. Taking out and air drying.
Working modes of the sensor:
the sensor has two operation modes, namely a gear synchronous adjustment mode and a free gear mode, as shown in fig. 4, and the two operation modes are referred to as a synchronous mode and a free mode. The synchronous mode means that the gear outlines of the four gear nuts 2 are matched with the synchronous belt 8, and when an external force couple acts on the synchronous belt 8, the synchronous belt 8 drives the four gear nuts 2 to synchronously rotate. The synchronous rotation of the gear nut 2 enables the four outer strings 6 to be stretched under the action of tensile force, and the prestress of the four outer strings 6 is ensured to be the same. And the rigidity of the whole structure is changed accordingly. The distance that the gear nut 2 moves downwards, i.e. the elongation of the outer chord, can be determined from the pitch and the angle of rotation of the threads. The specific relationship is
Where Δ is the distance the gear nut moves downward, p s Theta is the pitch and theta is the angle of rotation of the gear nut. Free mode means that three of the gears are fixed, leaving one gear unthreaded. In this mode, three outer chords are tight and only one is slack. In this operating state, the vibration mode of the top mass 4 changes. In synchronous mode, the direction of vibration of the top mass 4 is the same as the vibration, since the tension of all strings is the sameThe vibration directions of the dynamic sources are parallel. In free mode, the tension of each string of the sensor varies and is not exactly uniform. The soft string connected with the free gear is in a loose state, and the constraint of one string is reduced, so that the mass block is easier to be triggered to respond in a wider external frequency range. At this time, the vibration direction of the top mass block 4 is not parallel to the direction of the external vibration source, so that a certain included angle is formed. Insufficient contact between the electrodes occurs and the signal is attenuated, but to a lesser extent.
Synchronous mode and free mode broaden frequency operation:
the natural frequency of the sensor in the synchronous mode can be achieved by manually adjusting the synchronous belt 8, and according to the test result, the natural frequency can be increased by increasing the pre-tightening of the strings. In the practical process, the synchronous belt 8 can be continuously adjusted according to the frequency of the vibration source to keep the sensor in the maximum signal output state, and the sensor can have obvious signal output within a wide frequency range of 200Hz after being adjusted all the time.
In the free mode, the synchronous belt 8 is adjusted to determine a suitable initial frequency on the basis of the synchronous mode. Then, the synchronous belt 8 is removed, three of the gear nuts 2 are fixed by glue, and the remaining one of the gear nuts 2 is rotated to a free (i.e., not screwed) state. I.e. the synchronous mode needs to be adjusted all the time, while the free mode only needs to be adjusted one step.
The sensor can be used for vibration monitoring in extreme environments, such as wind vibration monitoring of high-voltage wires, and can still keep a stable working state after hail impact. Through experimental verification, the sensor can monitor different wind speeds and high-voltage wire faults. And can bear the impact of the speed of 20m/s in the simulation experiment of hail extreme weather. The road condition monitoring can also be carried out, and the road condition of the running road can be monitored immediately only by connecting the device with the portable oscilloscope and installing the device on a shared bicycle or an automobile. Experiments prove that the design can monitor the road conditions of the bulges and the pits.
Experiments prove that in the synchronous mode, the natural frequency of the sensor can be shifted by adjusting the synchronous belt. IntoAnd a widening of the frequency band can be achieved. In the free mode, the working frequency band of the sensor can be fundamentally widened under the condition that the bolt is not manually adjusted every time. In addition, the sensors were subjected to impact testing, applying up to 2.7X 10 5 After the impact of g acceleration, the performance of the sensor is not obviously reduced, and good voltage output can still be maintained.
The present invention and its embodiments have been described above schematically, without limitation, and what is shown in the drawings is only one of the embodiments of the present invention, and the actual structure is not limited thereto. Therefore, if the person skilled in the art receives the teaching, without departing from the spirit of the invention, the person skilled in the art shall not inventively design the similar structural modes and embodiments to the technical solution, but shall fall within the scope of the invention.
Claims (7)
1. Novel broadband, stretch-draw vibration acceleration sensor shocks resistance, its characterized in that: the device comprises a basic framework, a prestress adjusting module and a triboelectric friction block (5), wherein the basic framework is positioned in a shell (3), the basic framework comprises a top mass block (4), a base (9), four outer chords (6) and four inner chords (7), two ends of the four inner chords (7) are respectively connected with the top mass block (4) and the base (9), one end of each of the four outer chords (6) is connected with the top mass block (4), and the other end of each of the four outer chords (6) is connected with the center of a gear nut (2);
the prestress adjusting module comprises a bolt (1), a gear nut (2) and a synchronous belt (8), the bolt (1) is fixed in a preformed hole of a substrate (9) by glue, and the gear nut (2) is connected with the bolt (1); the gear nuts (2) are matched with the synchronous belt (8) to synchronously adjust the rotating angle of each gear nut (2);
the triboelectric friction block (5) comprises two friction electrodes, and one friction electrode comprises a water-assisted oxidized aluminum adhesive tape (14) and a first pet sheet which are sequentially adhered; the other friction electrode comprises a second pet sheet (10), a copper adhesive tape (11), a pi adhesive tape (12) and a ptfe film (13) which are sequentially adhered;
the two friction electrodes are respectively attached to the side edge of the top mass block (4) and the inner side of the shell (3).
2. The novel broadband, impact-resistant tensile vibration acceleration sensor according to claim 1, characterized in that: the top mass block (4) and the base (9) are printed and processed by 3d, are made of nylon glass fibers and serve as rigid compression parts in a tensioning integral structure; four outer chords (6) and four inner chords (7) are used as tension parts, and the material is ultrahigh molecular weight polyethylene.
3. The novel broadband, impact-resistant, tensile-vibration acceleration sensor according to claim 2, wherein: the bolt (1) is connected with the gear nut (2) and the gear nut (2) is connected with the synchronous belt (8) through a friction motion amplitude.
4. The novel broadband, impact-resistant tensile vibration acceleration sensor according to claim 3, characterized in that: the four outer chords (6) and the four inner chords (7) are connected with other components through glue.
5. The novel broadband, impact-resistant, tensile-vibrating acceleration sensor according to claim 4, wherein: the shell (3) is bonded with the basic framework through glue, and the bolt (1) is bonded with the substrate (9) through glue.
6. The novel broadband, impact-resistant tensile vibration acceleration sensor according to claim 5, characterized in that: the number of the gear nuts (2) is four, the gear outlines of the four gear nuts (2) are matched with the synchronous belt (3), and when an external force couple acts on the synchronous belt (8), the synchronous belt (8) drives the four gear nuts (2) to synchronously rotate; the synchronous rotation of the four gear nuts (2) enables the four outer strings (6) to be stretched under the action of tensile force, and the prestress of the four outer strings (6) is ensured to be the same.
7. The use method of the novel broadband and impact-resistant tension vibration acceleration sensor is characterized by comprising the following steps of: which employs a novel broadband, impact-resistant tensile vibration acceleration sensor as claimed in any one of claims 1 to 6 and comprises:
1. gear synchronous regulation mode: the synchronous rotation of the gear nuts (2) enables the four outer strings (6) to be stretched under the action of tensile force, so that the prestress of the four outer strings (6) is the same, and the rigidity of the whole sensor can be changed;
2. free gear mode: firstly adjusting a synchronous belt, determining a proper initial frequency, then removing the synchronous belt (8), fixing three gear nuts (2) by glue, and then rotating the remaining gear nut (2) to a free state.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211321669.1A CN115655453B (en) | 2022-10-26 | 2022-10-26 | Broadband, impact-resistant stretching vibration acceleration sensor and use method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211321669.1A CN115655453B (en) | 2022-10-26 | 2022-10-26 | Broadband, impact-resistant stretching vibration acceleration sensor and use method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN115655453A true CN115655453A (en) | 2023-01-31 |
| CN115655453B CN115655453B (en) | 2023-07-18 |
Family
ID=84991986
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211321669.1A Active CN115655453B (en) | 2022-10-26 | 2022-10-26 | Broadband, impact-resistant stretching vibration acceleration sensor and use method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115655453B (en) |
Citations (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB880361A (en) * | 1957-05-17 | 1961-10-18 | Borg Warner | Dual string force transducer |
| GB896101A (en) * | 1956-10-03 | 1962-05-09 | English Electric Co Ltd | Improvements in and relating to accelerometers |
| US3057208A (en) * | 1956-10-03 | 1962-10-09 | English Electric Co Ltd | Accelerometers |
| EP0037626A2 (en) * | 1980-02-28 | 1981-10-14 | P.A. Consulting Services Limited | Acceleration or inclination measuring instrument |
| US5426297A (en) * | 1993-09-27 | 1995-06-20 | United Technologies Corporation | Multiplexed Bragg grating sensors |
| CN2257019Y (en) * | 1995-09-08 | 1997-06-25 | 陕西青华机电研究所 | Differential vibrating cord accelerometer |
| US20080092398A1 (en) * | 2006-10-24 | 2008-04-24 | Heow, Inc. | Combination blower, trimmer and edger for tending vegetation |
| CN103335747A (en) * | 2013-06-03 | 2013-10-02 | 山东大学 | Intelligent detection method for pre-stress steel strand tensioning force |
| CN103344324A (en) * | 2013-06-21 | 2013-10-09 | 山西大学 | Vibration excitation equipment for entire acoustic vibration of violin and system and method for measuring frequency spectrum |
| CN106787945A (en) * | 2017-02-27 | 2017-05-31 | 重庆大学 | A kind of piezoelectricity friction electricity combined wide-band miniature energy collector |
| CN107314854A (en) * | 2017-07-07 | 2017-11-03 | 北京工业大学 | The device and method that bolt clamping force is decayed under a kind of real-time measurement vibration environment |
| CN109141857A (en) * | 2018-09-11 | 2019-01-04 | 西南交通大学 | A kind of Contact Net's Suspension Chord repeated impact test tooling and its test method |
| CN111521316A (en) * | 2020-05-19 | 2020-08-11 | 兰州理工大学 | Multi-gear vibrating wire type bolt state monitoring device and use and identification method thereof |
| CN112072952A (en) * | 2020-07-15 | 2020-12-11 | 南京航空航天大学 | Double-resonance type low-frequency extension vibration power generation device and method |
| US20210231701A1 (en) * | 2020-01-23 | 2021-07-29 | Analog Devices, Inc. | Method and apparatus for improving mems accelerometer frequency response |
-
2022
- 2022-10-26 CN CN202211321669.1A patent/CN115655453B/en active Active
Patent Citations (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB896101A (en) * | 1956-10-03 | 1962-05-09 | English Electric Co Ltd | Improvements in and relating to accelerometers |
| US3057208A (en) * | 1956-10-03 | 1962-10-09 | English Electric Co Ltd | Accelerometers |
| GB880361A (en) * | 1957-05-17 | 1961-10-18 | Borg Warner | Dual string force transducer |
| EP0037626A2 (en) * | 1980-02-28 | 1981-10-14 | P.A. Consulting Services Limited | Acceleration or inclination measuring instrument |
| US5426297A (en) * | 1993-09-27 | 1995-06-20 | United Technologies Corporation | Multiplexed Bragg grating sensors |
| CN2257019Y (en) * | 1995-09-08 | 1997-06-25 | 陕西青华机电研究所 | Differential vibrating cord accelerometer |
| US20080092398A1 (en) * | 2006-10-24 | 2008-04-24 | Heow, Inc. | Combination blower, trimmer and edger for tending vegetation |
| CN103335747A (en) * | 2013-06-03 | 2013-10-02 | 山东大学 | Intelligent detection method for pre-stress steel strand tensioning force |
| CN103344324A (en) * | 2013-06-21 | 2013-10-09 | 山西大学 | Vibration excitation equipment for entire acoustic vibration of violin and system and method for measuring frequency spectrum |
| CN106787945A (en) * | 2017-02-27 | 2017-05-31 | 重庆大学 | A kind of piezoelectricity friction electricity combined wide-band miniature energy collector |
| CN107314854A (en) * | 2017-07-07 | 2017-11-03 | 北京工业大学 | The device and method that bolt clamping force is decayed under a kind of real-time measurement vibration environment |
| CN109141857A (en) * | 2018-09-11 | 2019-01-04 | 西南交通大学 | A kind of Contact Net's Suspension Chord repeated impact test tooling and its test method |
| US20210231701A1 (en) * | 2020-01-23 | 2021-07-29 | Analog Devices, Inc. | Method and apparatus for improving mems accelerometer frequency response |
| CN111521316A (en) * | 2020-05-19 | 2020-08-11 | 兰州理工大学 | Multi-gear vibrating wire type bolt state monitoring device and use and identification method thereof |
| CN112072952A (en) * | 2020-07-15 | 2020-12-11 | 南京航空航天大学 | Double-resonance type low-frequency extension vibration power generation device and method |
Non-Patent Citations (4)
| Title |
|---|
| GE YAN: "Dynamically synergistic regulation mechanism for rotation energy harvesting", MECHANICAL SYSTEMS AND SIGNAL PROCESSING * |
| 杨婷婷: "基于谱分析的自升式平台疲劳强度评估方法研究", 广东造船 * |
| 胡鑫;黄博;唐刚;李志彪;袁丹丹;: "一种悬臂梁式摩擦宽频振动能量采集器的研究", 南昌工程学院学报, no. 01 * |
| 邓华,丁博涵: "拉索预应力球面网壳的风振性能研究", 浙江大学学报(工学版), no. 01 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN115655453B (en) | 2023-07-18 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Siddiqui et al. | An omnidirectionally stretchable piezoelectric nanogenerator based on hybrid nanofibers and carbon electrodes for multimodal straining and human kinematics energy harvesting | |
| Moretti et al. | A review of dielectric elastomer generator systems | |
| JP6212780B2 (en) | Wind power generator | |
| US8248750B2 (en) | Electroactive polymer transducers | |
| Park et al. | Highly conductive PEDOT electrodes for harvesting dynamic energy through piezoelectric conversion | |
| CN102308468B (en) | Non-resonant energy harvesting devices and methods | |
| US20180348821A1 (en) | Bend limit film | |
| AU2007231723A1 (en) | Energy harvesting apparatus and method | |
| KR20070067089A (en) | Device and method for influencing vibration of a planar element | |
| CN115655453A (en) | Novel broadband and impact-resistant tension vibration acceleration sensor and use method thereof | |
| Mutsuda et al. | Flexible piezoelectric sheet for wind energy harvesting | |
| KR20160016752A (en) | Method for monitoring deformation of a rotating element via a monitoring device employing optical fibre, and wind turbine equipped with such a device | |
| CN111130041A (en) | Damping device for wire clamp spacer ring | |
| Wardhana et al. | Characteristics of electric performance and key factors of a hybrid piezo/triboelectric generator for wave energy harvesting | |
| JP4383505B1 (en) | Electric field responsive polymer with improved power generation efficiency and durability | |
| Xiahou et al. | Strategies for enhancing low-frequency performances of triboelectric, electrochemical, piezoelectric and dielectric elastomer energy harvesting: recent progress and challenges | |
| CN113012673B (en) | Sound absorber with adjustable sound absorption frequency band | |
| US8669667B1 (en) | Method for generating electricity | |
| CN108506399B (en) | Adjustable rigidity support device based on dielectric elastomer | |
| US11646677B2 (en) | Element and method for manufacturing element | |
| WO2019146429A1 (en) | Method for manufacturing dielectric elastomer transducer | |
| CN209654160U (en) | Self-adaptation type bistable state float type wave energy power generation | |
| WO2016127980A1 (en) | Piezoelectric generator, pushbutton, radio module and method for producing a piezoelectric generator | |
| US20140062089A1 (en) | Changing radius generator | |
| CN115189628B (en) | Wind-rain-light multifunctional integrated power generation device with wind bell-like structure |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |