CN105841801B - A kind of water surface wave sensor measuring device - Google Patents
A kind of water surface wave sensor measuring device Download PDFInfo
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- CN105841801B CN105841801B CN201610267427.7A CN201610267427A CN105841801B CN 105841801 B CN105841801 B CN 105841801B CN 201610267427 A CN201610267427 A CN 201610267427A CN 105841801 B CN105841801 B CN 105841801B
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- surface wave
- wave sensor
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 63
- 239000002033 PVDF binder Substances 0.000 claims abstract description 77
- 229920002981 polyvinylidene fluoride Polymers 0.000 claims abstract description 77
- 239000004744 fabric Substances 0.000 claims abstract description 57
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 claims abstract description 28
- 238000009413 insulation Methods 0.000 claims abstract description 15
- 229910052751 metal Inorganic materials 0.000 claims description 14
- 239000002184 metal Substances 0.000 claims description 14
- 229920005594 polymer fiber Polymers 0.000 claims description 12
- 238000007667 floating Methods 0.000 claims description 8
- 230000005611 electricity Effects 0.000 claims description 5
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 claims description 4
- 229910052750 molybdenum Inorganic materials 0.000 claims description 4
- 239000011733 molybdenum Substances 0.000 claims description 4
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 claims description 4
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 claims description 3
- 239000006229 carbon black Substances 0.000 claims description 3
- 239000000835 fiber Substances 0.000 claims description 3
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims description 3
- 238000001514 detection method Methods 0.000 abstract description 15
- 238000011161 development Methods 0.000 description 6
- 239000011248 coating agent Substances 0.000 description 4
- 238000000576 coating method Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 238000012544 monitoring process Methods 0.000 description 3
- 230000008447 perception Effects 0.000 description 3
- 230000008092 positive effect Effects 0.000 description 3
- 230000002265 prevention Effects 0.000 description 3
- 238000012545 processing Methods 0.000 description 3
- 238000006424 Flood reaction Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 241000630329 Scomberesox saurus saurus Species 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 238000007405 data analysis Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000009429 distress Effects 0.000 description 1
- 235000013399 edible fruits Nutrition 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 230000001568 sexual effect Effects 0.000 description 1
- 230000035882 stress Effects 0.000 description 1
- 229910052721 tungsten Inorganic materials 0.000 description 1
- 239000010937 tungsten Substances 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01H—MEASUREMENT OF MECHANICAL VIBRATIONS OR ULTRASONIC, SONIC OR INFRASONIC WAVES
- G01H11/00—Measuring mechanical vibrations or ultrasonic, sonic or infrasonic waves by detecting changes in electric or magnetic properties
- G01H11/06—Measuring mechanical vibrations or ultrasonic, sonic or infrasonic waves by detecting changes in electric or magnetic properties by electric means
- G01H11/08—Measuring mechanical vibrations or ultrasonic, sonic or infrasonic waves by detecting changes in electric or magnetic properties by electric means using piezoelectric devices
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Geophysics And Detection Of Objects (AREA)
- Transducers For Ultrasonic Waves (AREA)
Abstract
The invention patent discloses a kind of water surface wave sensor measuring device, and the PVDF piezoelectric fabric of four cantilever beam structures is equipped on the pedestal of water surface wave sensor, and is evenly and symmetrically distributed on pedestal.PVDF piezoelectric fabric, surface even spread a pair of symmetry electrode can be used first electrode as anode, and second electrode is used as cathode.One layer of waterproof insulation film is wrapped up in first electrode and second electrode surface, avoid PVDF piezoelectric fabric in use, due to human factor perhaps the influence of non-artificial factor and peel off or with surrounding medium short-circuit conditions occur for electric first electrode and second electrode in use.The PVDF piezoelectric fabric prepared is evenly and symmetrically distributed on pedestal.Four PVDF piezoelectric fabrics are swum on the water surface after being fixedly mounted on the pedestal of water surface wave sensor, measure the specific location of waterborne target object.Water surface wave sensor measuring device major advantage is that signal detection range is wide, target information acquisition is complete, precision is high, speed is fast.
Description
Technical field
The present invention relates to a kind of water surface wave sensor measuring devices.
Background technique
Now, floods always influence one of maximum natural calamity in the world, and floods not only compromise the people's
Safety, and cause huge economic loss to country, individual, to socio-economic development produce can not be estimated it is bad after
Fruit.For this purpose, timely aquatic environment and waterborne target can be detected and positioned by water surface movable robot, search battalion
The person in distress in water and its property of floating are rescued, the loss of disaster bring is reduced.In addition, the detection of research waterborne target and positioning
Mode, method are also as water surface movable robot navigation, the theoretical basis of search and rescue.
In recent years, such as mobile using the environment around the perception of various sensors as mobile robot is more and more intelligent
Robot carries out target detection and avoidance etc. using sonar sensor, is carried out using laser sensor apart from detection etc., but these
Sensor cannot widely judge the case where ambient enviroment；Although its target of judgement and mesh that vision system can be more wide
Environment around marking, Computer Image Processing ability and technology have certain development and a large amount of digital image processing apparatus
Can price ratio increase, but due to the complexity and uncertainty of environment and object and the quality of sensor itself outside
The influence of portion's circumstances on sexual energy, providing information using a single sensor has limitation and uncertainty.Therefore, in order to reach
To certain real-time, we need to detect target in such a way that vision system is with range-measurement system writing.Domestic and international application view
Feel that the open source literature data in terms of the mode combined with millimetre-wave radar carries out detection study to waterborne target is less, and the water surface
The technology that target detection, avoidance, navigation etc. mostly use single-sensor or other sensors to blend, accuracy and accuracy phase
To not high, it is therefore necessary to the modes mutually to cooperate according to vision and millimetre-wave radar more effectively to realize to ambient condition information
Perception, and then detect with positioning the water surface on target.But there is measuring system to complicate, influenced by extraneous factor
It is larger, survey error it is very big the disadvantages of.
Currently, mainly having sonar sensor, laser sensing there are many sensor of detection waterborne target object in the market
Device and vision system sensor.But these three sensors have very big defect, and sonar sensor and laser sensor cannot be wide
The case where judging ambient enviroment generally；Vision system sensor structure is complicated, be affected by extraneous factor, speed is slow and essence
It spends low.
Summary of the invention
The purpose of the present invention is to the above problems, and providing one kind may be implemented detection waterborne target, target search and rescue, water
Face environmental monitoring, ensure marine operation safety, play in collision prevention positive effect and be capable of providing relatively reliable data
Water surface wave sensor measuring device.
The purpose of the present invention is being achieved through the following technical solutions, a kind of water surface wave sensor measuring device, feature exists
In: including floating ball, four PVDF piezoelectric fabrics, pedestals, four PVDF piezoelectric fabrics, which are uniformly and symmetrically distributed, to be mounted on
On pedestal；PVDF piezoelectric fabric surface is coated with a pair of equally distributed symmetry electrode, and one of electrode is the first electricity
Pole, another is second electrode；The floating ball is installed on the uncoated first electrode in PVDF piezoelectric fabric free end, the second electricity
The part of pole.
Angle between every two PVDF piezoelectric fabrics is 90 °, right among each PVDF piezoelectric fabric and pedestal
The angle of axis is referred to as 45 °, and the angle with pedestal is 30 °.
The center line of the first electrode and the centerlines of second electrode are 180 °, first electrode and second electrode
Cornerite is 120 °, and an electrode is as anode in first electrode and second electrode, another electrode is as cathode.
The PVDF piezoelectric fabric cross-sectional shape is circle.
The PVDF piezoelectric fabric is a kind of PVDF piezoceramic-polymer fiber, and PVDF piezoelectric fabric is by first electrode, second
Electrode, PVDF piezopolymer, metal core and waterproof insulation film composition；The PVDF piezopolymer, which is uniformly wrapped up in, invests metal
On core, first electrode, second electrode, which are uniformly and symmetrically distributed, to be coated on PVDF piezopolymer, and waterproof insulation film is wrapped in
On one electrode, second electrode.
The metal core is molybdenum filament or tungsten wire.
The diameter of the metal core is 0.08mm, 0.09mm or 0.10mm；
The first electrode, second electrode include metal layer or conducting resinl or conductive silver paste or carbon black, and surface electrode is complete
Electrode.
One layer of waterproof insulation film is wrapped up in the first electrode, second electrode.
Structure of the invention is rationally simple, it is easy, easy to use to manufacture, and through the invention, the present invention relates to a kind of water
Wave sensor measuring device, with PVDF piezoelectric fabric, specifically a kind of PVDF piezoceramic-polymer fiber is sensed in water surface wave
The PVDF piezoelectric fabric of four cantilever beam structures is installed on the pedestal of device, and is evenly and symmetrically distributed on pedestal.With this
Kind PVDF piezoelectric fabric, surface even spread a pair of symmetry electrode can be used first electrode as anode, and second electrode is made
It is used for cathode, and wraps up one layer of waterproof insulation film in first electrode and second electrode surface, avoid PVDF piezoelectric fabric
In use, due to human factor perhaps the influence of non-artificial factor and peel off or first electrode and second electrode exist
Short-circuit conditions occur with surrounding medium in use process.
The PVDF piezoelectric fabric prepared is evenly and symmetrically distributed on pedestal.The water surface wave sensor prepared is surveyed
It measures device to throw on the water surface, when a kind of continuity that piezopolymer device of the water surface wave to PVDF piezoelectric fabric generates loads
Or impact load, so that piezopolymer device exports a voltage signal.It is obtained eventually by the analysis processing to data
The orientation of water surface wave wave source.
The shortcomings that according to sonar sensor sensor surveying unit, laser sensor measuring device and vision system, this is specially
Benefit has invented a kind of water surface wave sensor measuring device, greatly improves the deficiency of above-mentioned three kinds of measuring devices.It therefore, can be with
Realize the accurate measurement to waterborne target object space.Water surface wave sensor measuring device wide, target with signal detection range
The features such as acquisition of information is complete, precision is high, speed is fast, structure is simple, therefore, water surface wave sensor measuring device is in mobile machine
The development prospect that application in people's target detection is increasingly valued by people and has shown, in detection waterborne target, mesh
Mark searches and rescues, plays positive effect in aquatic environment monitoring, marine operation safety and collision prevention, provides relatively reliable data.
Such sensor configuration mode will also become development trend important in following water surface movable robot navigation's mode.
Through the above technical solutions, detection water surface mesh may be implemented in a kind of water surface wave sensor measuring device of the invention
Mark, target search and rescue, play positive effect in aquatic environment monitoring, marine operation safety and collision prevention, provide relatively reliable
Data.
As mobile robot is more and more intelligent, the environment around the perception of various sensors, target detection, avoidance are used
With popularizing for aquatic environment detection etc., the non-electrical parameter for needing a large amount of sensor that will measure and control, being converted into can be with calculating
The compatible signal of machine, the input signal as theirs, this provides chance with regard to the fast development of water supply wave sensor, is formed
The development of considerable water surface wave sensor industry.
Detailed description of the invention
Fig. 1 is a kind of structural schematic diagram of water surface wave sensor measuring device of the present invention.
Fig. 2 is the structural schematic diagram of PVDF piezoelectric fabric of the invention.
In figure: 1 floating ball, 2 PVDF piezoelectric fabrics, 201 waterproof insulation films, 202 first electrodes, 203 metal cores,
204 second electrodes, 205 PVDF piezopolymers, 3 pedestals.
Specific embodiment
With reference to the accompanying drawing and Detailed description of the invention the present invention is described further.
The water surface wave sensor measuring device is made of the PVDF piezoelectric fabric 2 of a pedestal 3 and four cantilever beam structures,
PVDF piezoelectric fabric 2 is a kind of PVDF piezoceramic-polymer fiber, and the PVDF piezoelectric fabric 2 of four cantilever beam structures is symmetrically
It is distributed on pedestal 3, the angle between every two PVDF piezoelectric fabrics 2 is 90 °, in each PVDF piezoelectric fabric 2 and pedestal 3
Between the angle of symmetry axis be 45 °, the angle with pedestal 3 is 30 °.Every 2 surface of PVDF piezoelectric fabric is all coated with a pair of symmetrical
Electrode, symmetry electrode is first electrode 202, second electrode 204, between the electrode and cantilever beam of the coating of PVDF piezoelectric fabric surface
It is that insulation and electrode (first electrode 202, second electrode 204) surface are coated with one layer of waterproof insulation film 201, two
Center lines of electrodes angle is 180 °, and the cornerite of each electrode is 120 °, and an electrode is as anode, another electrode is as negative
Pole uses；One layer of waterproof insulation film is wrapped up on 204 surface of first electrode 202 and second electrode, avoids PVDF piezoelectric fabric 2
In use, due to human factor perhaps the influence of non-artificial factor and peel off or first electrode 202 and second electrode
204 occur short-circuit conditions with surrounding medium in use.One is installed in 2 free end of PVDF piezoelectric fabric of cantilever beam structure
The floating ball 1 of a ultra-hydrophobicity enables water surface wave sensor measuring device to swim on the water surface, four prepared piece
PVDF piezoelectric fabric 2 is mounted on the pedestal 3 of water surface wave sensor.Water surface wave sensor measuring device is placed in the water surface
On, when water surface wave generates a kind of load of continuity or impact load to PVDF piezoelectric fabric 2, so that PVDF piezo-polymeric sundries
Part exports a voltage signal.Since water surface wave is in wave process, the time for reaching four PVDF piezoelectric fabrics 2 is different, makes
When proper PVDF piezoelectric fabric 2 is by impact force, the voltage signal of output divides there are a time difference eventually by data
Analysis handles the orientation for obtaining water surface wave wave source, to realize the detection to waterborne target, target is searched and rescued, aquatic environment monitors etc..
Selectively, which is a kind of similar water skipper structure, and the PVDF piezoelectric fabric 2 of four cantilever beam structures is mounted on base
On seat 3, every PVDF piezoelectric fabric 2 is all cantilever beam structure, and one end is fixed on pedestal 3, PVDF piezoceramic-polymer fiber table
A pair of equally distributed symmetry electrode of face coating, one of electrode are first electrode 202, another electrode is second electrode
204, it is insulation between the electrode and cantilever beam of the coating of piezoceramic-polymer fiber surface.
Selectively, four cantilever beam structure PVDF piezoelectric fabrics 2 of the device are evenly and symmetrically distributed on pedestal 3, often
Angle between two PVDF piezoelectric fabrics 2 is 90 °, and the angle of each PVDF piezoelectric fabric 2 and 3 intermediate symmetry axis of pedestal is
45 °, the angle with pedestal 3 is 30 °.
Selectively, which has one group of symmetry electrode, and two center lines of electrodes angles are 180 °, and
The cornerite of each electrode is 120 °, and an electrode is used as anode, another electrode as cathode.
Selectively, 2 cross-sectional shape of PVDF piezoelectric fabric of the cantilever beam structure is circle.
Selectively, the PVDF fiber 2 of the cantilever beam structure is a kind of piezoceramic-polymer fiber.
Selectively, it is that molybdenum filament or tungsten wire, uniform wrap up in are attached to molybdenum filament or tungsten which, which is by intermediate core,
Piezopolymer on silk table face is formed with the electrode for being coated on piezopolymer surface.
Selectively, the metallic core diameter among the piezoceramic-polymer fiber can be 0.08mm, 0.09mm or 0.10mm.
Selectively, the electrode of piezoceramic-polymer fiber surface coating includes metal layer or conducting resinl or conductive silver paste,
Or carbon black, surface electrode are full electrode.
Selectively, the electrode on the piezoceramic-polymer fiber surface with water in order to not contact, on coated surface electrode
Waterproof insulation film is installed.
Selectively, for the piezoceramic-polymer fiber in the part of the uncoated electrode in free end, installing has ultra-hydrophobicity
Float ball 1.
A kind of water surface wave sensor measuring device of invention is as shown in Figure 1, fine by floating ball 1, PVDF piezoelectricity
Dimension 2 and pedestal 3 form.
Fig. 2 is the structural schematic diagram of PVDF piezoelectric fabric, and PVDF piezoelectric fabric 2 is a kind of PVDF piezoceramic-polymer fiber,
It is made of first electrode 202, second electrode 204, PVDF piezopolymer 205, metal core 203 and waterproof insulation film 201.It will
The PVDF piezoelectric fabric 2 prepared is mounted on the pedestal 3 of water surface wave sensor, is finally placed on the water surface and is detected waterborne target,
Target is searched and rescued, aquatic environment monitors etc..Object can generate water surface wave when flowing on the water surface.When the fluctuation of water surface wave is passed to water surface wave
When sensor measuring device, impact force can be generated to PVDF piezoelectric fabric 2, PVDF piezoelectric fabric 2 is after receiving impact force, stress
One end can occur bending and deformation to the one end not stressed, impact force is bigger, and deflection is also bigger, otherwise smaller.PVDF piezoelectricity
For fiber 2 when deforming, the electrode of PVDF piezoelectric fabric 2 can export a voltage value, and deflection is bigger, the electricity of output
Voltage value is bigger.Water surface wave sensor according in the same time, water surface wave to the impact force powers of four PVDF piezoelectric fabrics 2 not
Together, the deflection of PVDF piezoelectric fabric 2 is also different, and the voltage signal power of output is also just different, and is judged according to this property
The wave source of water surface wave, to detect the specific location of waterborne target.
Water surface wave sensor measuring device is needed before detecting waterborne target by two on every PVDF piezoelectric fabric 2
Electrode (first electrode 202, second electrode 204) is linked to the input terminal of charge amplifier with metal lead wire, by charge amplifier
Output end connected with data collecting card, then data collecting card is connected on computer.Water is detected by water surface wave sensor
The obtained data of Area Objects are analyzed, the specific location of you can get it waterborne target.
Claims (8)
1. a kind of water surface wave sensor measuring device, it is characterised in that: including floating ball (1), four PVDF piezoelectric fabrics
(2), pedestal (3), four PVDF piezoelectric fabrics (2), which are uniformly and symmetrically distributed, to be mounted on pedestal (3)；The PVDF piezoelectricity is fine
Dimension (2) surface is coated with a pair of equally distributed symmetry electrode, and one of electrode is first electrode (202), another is the
Two electrodes (204)；The floating ball (1) is installed on the uncoated first electrode in PVDF piezoelectric fabric (2) free end (202),
The part of two electrodes (204)；The PVDF piezoelectric fabric (2) is a kind of PVDF piezoceramic-polymer fiber, PVDF piezoelectric fabric (2)
By first electrode (202), second electrode (204), PVDF piezopolymer (205), metal core (203) and waterproof insulation film
(201) it forms；The PVDF piezopolymer (205) uniformly wraps up in and invests on metal core (203), first electrode (202), the second electricity
Pole (204), which is uniformly and symmetrically distributed, to be coated on PVDF piezopolymer (205), and waterproof insulation film (201) is wrapped in the first electricity
On pole (202), second electrode (204).
2. a kind of water surface wave sensor measuring device according to claim 1, it is characterised in that: every two PVDF pressure
Angle between electric fiber (2) is 90 °, and the angle of each PVDF piezoelectric fabric (2) and pedestal (3) intermediate symmetry axis is 45 °,
Angle with pedestal (3) is 30 °.
3. a kind of water surface wave sensor measuring device according to claim 1, it is characterised in that: the first electrode
(202) centerlines of center line and second electrode (204) are 180 °, first electrode (202) and second electrode (204)
Cornerite is 120 °, and an electrode is as anode in first electrode (202) and second electrode (204), another electrode is as negative
Pole.
4. a kind of water surface wave sensor measuring device according to claim 1, it is characterised in that: the PVDF piezoelectric fabric
(2) cross-sectional shape is circle.
5. a kind of water surface wave sensor measuring device according to claim 1, it is characterised in that: the metal core (203)
For molybdenum filament or tungsten wire.
6. a kind of water surface wave sensor measuring device according to claim 1, it is characterised in that: the metal core (203)
Diameter be 0.08mm, 0.09mm or 0.10mm.
7. a kind of water surface wave sensor measuring device according to claim 1, it is characterised in that: the first electrode
(202), second electrode (204) includes metal layer or conducting resinl or conductive silver paste or carbon black, and surface electrode is full electrode.
8. a kind of water surface wave sensor measuring device according to claim 1, it is characterised in that: the first electrode
(202), one layer of waterproof insulation film (201) is wrapped up in second electrode (204).
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610267427.7A CN105841801B (en) | 2016-04-27 | 2016-04-27 | A kind of water surface wave sensor measuring device |
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| CN201610267427.7A CN105841801B (en) | 2016-04-27 | 2016-04-27 | A kind of water surface wave sensor measuring device |
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| CN105841801A CN105841801A (en) | 2016-08-10 |
| CN105841801B true CN105841801B (en) | 2019-04-09 |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1646887A (en) * | 2002-04-08 | 2005-07-27 | 韦伯罗特龙股份有限公司 | Piezoelectric vibration sensor |
| CN101304069A (en) * | 2008-06-13 | 2008-11-12 | 南京航空航天大学 | Piezoelectric ceramic fibre containing metal core painted by electrode partly |
| CN102013837A (en) * | 2010-12-23 | 2011-04-13 | 南京航空航天大学 | Dandelion-like multi-directional broadband piezoelectric vibration energy collection device |
| JP2011137637A (en) * | 2009-12-25 | 2011-07-14 | Nec Tokin Corp | Surface acoustic wave resonator type vibration sensor |
| CN201903398U (en) * | 2010-08-30 | 2011-07-20 | 江苏省电力公司宜兴市供电公司 | Vibrating sensor based on directionality |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2006028222A1 (en) * | 2004-09-10 | 2006-03-16 | Matsushita Electric Industrial Co., Ltd. | Vibration detecting sensor and pressure sensitive switch using cable-shaped piezoelectric element |
-
2016
- 2016-04-27 CN CN201610267427.7A patent/CN105841801B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1646887A (en) * | 2002-04-08 | 2005-07-27 | 韦伯罗特龙股份有限公司 | Piezoelectric vibration sensor |
| CN101304069A (en) * | 2008-06-13 | 2008-11-12 | 南京航空航天大学 | Piezoelectric ceramic fibre containing metal core painted by electrode partly |
| JP2011137637A (en) * | 2009-12-25 | 2011-07-14 | Nec Tokin Corp | Surface acoustic wave resonator type vibration sensor |
| CN201903398U (en) * | 2010-08-30 | 2011-07-20 | 江苏省电力公司宜兴市供电公司 | Vibrating sensor based on directionality |
| CN102013837A (en) * | 2010-12-23 | 2011-04-13 | 南京航空航天大学 | Dandelion-like multi-directional broadband piezoelectric vibration energy collection device |
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