CN108982044A - A kind of exciting bank for electric power pylon modal idenlification - Google Patents
A kind of exciting bank for electric power pylon modal idenlification Download PDFInfo
- Publication number
- CN108982044A CN108982044A CN201810600317.7A CN201810600317A CN108982044A CN 108982044 A CN108982044 A CN 108982044A CN 201810600317 A CN201810600317 A CN 201810600317A CN 108982044 A CN108982044 A CN 108982044A
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- CN
- China
- Prior art keywords
- electric power
- power pylon
- sleeve
- exciting bank
- electromagnet
- 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.)
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M7/00—Vibration-testing of structures; Shock-testing of structures
- G01M7/08—Shock-testing
Abstract
The invention discloses a kind of exciting bank for electric power pylon modal idenlification, high-strength magnet, high strength helical spring, sleeve and electromagnet including shell and setting inside housings；Shell is cylinder, is divided into upper housing and lower case two parts, is connected through a screw thread between upper housing and lower case.It is of great significance for the dynamic response and Modal Parameter Identification of studying electric power pylon.
Description
Technical field
The invention belongs to power transmission state monitorings and fault diagnosis technology field, and in particular to one kind is used for electric power pylon
The exciting bank of modal idenlification.
Background technique
In the power system, important component of the electric power pylon as power transmission, safe operation are to guarantee electric energy
An important factor for conveying capacity.Topography complicated condition locating for electric power pylon, is subjected to displacement often, tilts, cracking, sinks etc. existing
As.Tower body sedimentation inclination especially is caused in the reasons such as severe natural phenomenon (such as sleet, strong wind) or artificial destruction, is caused defeated
Electric line and communication network interrupt, or even cause the accident of falling tower.Electric power pylon accident was even more and more frequently, caused not in recent years
Appreciable loss.
Done many research to electric power pylon both at home and abroad in recent years, many scholars attempt by experiment simulation and by
Power analysis solves this problem, and is made that many theoretical researches, but be only merely resting on theory, and it is real to lack electric power pylon
When operating analysis and verifying.Some scholars measure Iron tower incline, but its by the method for installing obliquity sensor additional in electric power pylon
It can only reflect the state parameter of the stress and balancing the load when steel tower entirety deformation is larger indirectly, it is smaller to iron tower deformation or local
The equal hidden failures of rod piece yield failure tend not to find in time.Some scholars on electric power pylon by installing strain sensing additional
To realize, remotely monitoring iron tower structure damages device, and the common small precision of strain transducer measurement range is low, for small damage
Even more it is difficult to identify well, and installation number, installation site and stickup direction limit the development of this method.Modal technique
Development, promote analysis of some scholars to electric power pylon dynamic property, pass through monitoring ambient wind velocity, wind direction and electric power pylon
Acceleration, the vibratory response of the electric power pylon under research environment load.The vibratory response of steel tower can preferably reflect steel tower
Constructional aspect, however the steel tower vibration under wind acts on is faint, some regional wind excitations are even more to be difficult so that electric power pylon generation is bright
Aobvious vibration.
Summary of the invention
The purpose of the present invention is to provide a kind of exciting banks for electric power pylon modal idenlification, can be according to practical need
It asks and produces suitable pulse excitation, so that steel tower forced vibration, solves the problems such as wind excitation is not of uniform size, discontinuous,
The technical scheme is that a kind of exciting bank for electric power pylon modal idenlification, including shell and setting
High-strength magnet, high strength helical spring, sleeve and electromagnet inside housings；Shell is cylinder, is divided into upper housing under
Shell two parts, are connected through a screw thread between upper housing and lower case.
It is a feature of the present invention that
The bottom of lower case is fixed with high-strength magnet, and there are four wedges for setting on the side wall at the cm of lower case bottom surface
Son is fixed with a partition at the top of lower case, and partition upper surface is fixed with main circuit board.
Stretch conducting wire is connected on main circuit board, stretch conducting wire by the string holes on partition, then with the electromagnet of lower section
It is connected with shock sensors.
Stretch conducting wire is set as spiral shape；High-strength magnet uses NdFeB material, is annulus shape.
The basal diameter of sleeve is identical as high-strength magnet internal diameter, is stuck in the inner hole of high-strength magnet, and sleeve top is provided with
Circular edge, the cylinder of sleeve, opposite position are opened there are two through slot, and the outer diameter of circular edge is bigger than the interior diameter of electromagnet,
And it is less than the diameter of shell, the lower surface of circular edge is provided with one layer of sponge.
Sleeve outer sheath is equipped with high strength helical spring, and the outer diameter of sleeve is smaller than the internal diameter of high strength helical spring, high-strength
Degree helical spring one end is fixed on high-strength magnet, and the other end is connected on electromagnet.
The cross section of electromagnet is ring-type, is sleeved on sleeve, the interior diameter direction of electromagnet is provided with steel plate, steel
The width of plate is smaller than the width of through slot, and steel plate is located exactly in two through slots of sleeve, and the middle position of steel plate is set downward vertically
It is equipped with a connecting rod, the lower part of connecting rod is connected with shock sensors, is equipped with tup below shock sensors.
Circuit board includes sequentially connected charge amplifier, MCU and bluetooth module, and MCU also connects with driving circuit and TTL
Mouth connection, driving circuit are connect by stretch conducting wire with electromagnet, and bluetooth module can also pass through Bluetooth signal and mobile phone and/or electricity
Brain connection.
MCU uses fpga chip.
MCU is sequentially connected with power panel and rechargeable battery, and power panel is also connected with connecting terminal, and connecting terminal stretches out shell
Body.
The invention has the advantages that devising a kind of exciting bank for electric power pylon modal idenlification, device volume
It is small, light-weight, easy to install and use.User can use mobile phone or PC and pass through the short distance communication of bluetooth realization and device, behaviour
Make simple and convenient.This external expansion TTL interface can support the connection of device Yu other devices, practical.The MCU of device is embedded in
There are high-precision Kalman filtering algorithm and fast Fourier transformation algorithm, it can be achieved that the high precision collecting and time domain of data are to frequency domain
Transformation.
Detailed description of the invention
Fig. 1 is structural schematic diagram of the present invention for the exciting bank of electric power pylon modal idenlification；
Fig. 2 is the exciting bank middle sleeve structural schematic diagram that the present invention is used for electric power pylon modal idenlification；
Fig. 3 is structural schematic diagram of the present invention for the electromagnet in the exciting bank of electric power pylon modal idenlification；
Fig. 4 is modular structure block diagram of the present invention for the exciting bank of electric power pylon modal idenlification.
In figure, 1. shells, 1-1. upper housing, 1-2. lower case, 1-3. partition, 1-4. chock, 1-5. string holes, 1-6. power supply
Plate, 1-7. rechargeable battery, 1-8 connecting terminal, 2. high-strength magnet, 3. high strength helical springs, 4. sleeves, 4-1. circular edge,
4-2. through slot, 4-3. sponge, 4-4. cylinder, 5. electromagnet, 5-1. stretch conducting wire, 5-2. steel plate, 5-3. connecting rod, 6. impact forces
Sensor, 7. tups, 8. circuit boards, 8-1.MCU, 8-2. driving circuit, 8-3. charge amplifier, 8-4. bluetooth module, 8-
5.TTL interface.
Specific embodiment
Invention is described in detail with reference to the accompanying drawings and detailed description.
A kind of exciting bank for electric power pylon modal idenlification as shown in Figure 1, including shell 1, and is arranged in shell 1
Internal high-strength magnet 2, high strength helical spring 3, sleeve 4 and electromagnet 5；
Shell 1 is cylinder, is divided into upper housing 1-1 and lower case 1-2 two parts, between upper housing 1-1 and lower case 1-2
It is connected through a screw thread, it can be achieved that two-part disassembly above and below shell.Basal diameter 8cm, upper and lower two parts of shell 1 are total altogether
High 13cm is made by 304 stainless steel materials, can prevent exposing to the weather, while preventing environment from causing to damage to device inside.
The bottom of lower case 1-2 is fixed with high-strength magnet 2, is provided on the side wall at lower case 1-2 bottom surface 2cm
Four chock 1-4 are prevented high-strength magnet from loosening and sidesway occur for limiting the position of high-strength magnet 2, bonded using glue rifle so that
High-strength magnet is fixedly connected with the inner wall of 1 bottom of shell, and the bottom surface of high-strength magnet 2 is the bottom surface for being used as whole device, is passed through
Magnetic-adsorption is on steel tower surface.
A partition 1-3 is fixed at the top of lower case 1-2, the upper surface partition 1-3 is fixed with main circuit board 8, main circuit
Be connected with stretch conducting wire 5-1 on plate 8, stretch conducting wire by the string holes 1-5 on partition 1-3, then with the electromagnet 5 of lower section and punching
The connection of force snesor 6 is hit, stretch conducting wire 5-1 is set as spiral shape；It is in compressive state in normal state, in exciting bank work
It is stretched when making with the movement of high-strength magnet 1-2.
High-strength magnet 2 uses NdFeB material, is annulus shape, overall diameter 8cm, interior diameter 4cm, high 2cm.Due to height
Strong magnet 2 has very strong attraction, and device is firmly adsorbed on tower material of iron tower, recycles waterproof clay bonding
With the contact surface of iron material, install extremely convenient.
As shown in Fig. 2, sleeve 4 uses aluminum alloy materials, the height of sleeve 4 is 10cm, the basal diameter of sleeve 4 with it is high-strength
2 internal diameter of magnet is identical, is stuck in the inner hole 2-1 of high-strength magnet 2.
4 top of sleeve is provided with circular edge 4-1, and the outer diameter of circular edge 4-1 is 2~3cm bigger than the interior diameter of electromagnet,
And it is less than the diameter of shell, and the lower surface of circular edge 4-1 is provided with one layer of sponge 4-3, when for preventing electromagnet from restoring,
Collision circular edge causes to cause to damage to device.The cylinder 4-4 of sleeve 4, opposite position are opened there are two through slot 4-2,
4 outer sheath of sleeve is equipped with high strength helical spring 3, and the outer diameter of sleeve is smaller than the internal diameter of high strength helical spring 3 by 1~
2cm；
3 one end of high strength helical spring is fixed on high-strength magnet 2, and the other end is connected on electromagnet 5.
The cross section of electromagnet 5 is ring-type, is sleeved on sleeve 4, the internal diameter of electromagnet 5 is bigger than the outer diameter of sleeve 4 by 1~
2cm；
Electromagnet 5 selects direct current sucked type electromagnet, and cross-sectional shape is annular shape, interior diameter 4.2cm, it is outer directly
Diameter is 7.0cm.
As shown in figure 3, being provided with steel plate 5-2 along the interior diameter direction of electromagnet 5, the width of steel plate 5-2 is than through slot 4-2
Width it is small so that steel plate 5-2 is located exactly in two through slot 4-2 of sleeve 4 when electromagnet sleeve is on the sleeve 4,
Play the role of limit, guarantees that skew does not occur when electromagnet moves up and down.
The middle position of steel plate 5-2 is provided with a connecting rod 5-3 downward vertically, and the lower part of connecting rod 5-3 is connected with punching
Force snesor 6 is hit, the lower section of shock sensors 6 is equipped with tup 7,
Shock sensors 6 use HAD-QSY8301-03, can measure to impact force in the impact force of 100KN.
Tup 7 can be fixed on shock sensors 6 by bolt arrangement, and tup 7 is nylon material, on the one hand can subtract
On the other hand damage when small shock steel tower can generate higher energy when hitting.
Such as Fig. 4, circuit board 8 includes sequentially connected shock sensors, charge amplifier, MCU and bluetooth module,
MCU8-1 is also connect with driving circuit 8-2 and TTL interface 8-5,
Driving circuit 8-2 is connect by stretch conducting wire 5-1 with electromagnet 5,
Bluetooth module can also be connect by Bluetooth signal with mobile phone and/or computer,
TTL interface 8-5 is used to connect other desired equipment,
MCU8-2 is sequentially connected with power panel 1-6 and rechargeable battery 1-7, and power panel 1-6 is also connected with connecting terminal 1-8,
The effect of power panel 1-6 is that can produce the required voltage class for meeting whole device, provides electric energy for whole device.
The charge and discharge for controlling rechargeable battery 1-7 prevent from influencing its service life because of overshoot over-discharge.
Connecting terminal 1-8 stretches out shell 1 and directly supplies convenient for the access of external power supply so that device be made to receive external power supply
Electricity, or for charging to rechargeable battery.
Wherein MCU8-1 uses fpga chip, which carries high-precision A/D sampling functions, issues to charge amplifier
Signal is sampled, and since MCU8-1 driving capability is limited, driving signal must be through driving circuit 8-2 ability drive electromagnet 1-
5。
Charge amplifier connects the I/O port of fpga chip, and charge amplifier is connected with MUC by Shielded Twisted Pair, and impact force passes
Sensor 6 is connected by Shielded Twisted Pair with charge amplifier.
Wherein, MCU8-1 is worked signal amplification drive electromagnet 5 through driving circuit 8-2 by output high level signal.
It is 1s that device, which defaults high level time, and device can produce the impulsive force of 50KN when hitting steel tower.It can repair according to actual needs
Change and account for high level time, obtains suitable impact force.
Charge amplifier 8-3 points connect with MCU8-1 and shock sensors 6, and shock sensors 6 are by data through charge
Amplifier 8-3 processing is voltage signal, and treated, and signal carries out at A/D sampling through MCU8-1 included sampling with high precision module
Reason.
High-precision Kalman filtering and fast Fourier transformation algorithm are embedded in MCU8-1.High-precision Kalman filtering
Algorithm is filtered acquisition data, waits until high-precision measurement data by removal trend term and reinforcing window processing, mentions
High measurement accuracy.Final data, by time domain data, is converted into frequency domain data by Fast Fourier Transform.
Bluetooth module 8-4 and the TTL8-5 interface connected in MCU8-1, allow user by mobile phone or computer and
Device connection, it is 115200 that device, which defaults communication baud rate,.After user and device communication are upper, on the one hand can with operating device,
On the other hand the configuration of device can be changed, such as the sampling rate of device, MCU8-1 export high level time parameter.In addition,
TTL, which connects, supports device to connect with other monitoring devices, and scalability is strong.
Whole device working principle of the invention are as follows: in the operational order for receiving user, MCU8-1 generates high level
Signal, the work of drive electromagnet 5 obtains magnetic after driving circuit 8-2 amplifies signal.Under the action of high-strength magnet 2, electromagnetism
Iron 5 compresses high strength helical spring 3, so that the tup 7 being fixed on electromagnet 5 taps the pulse that steel tower generates a 20KN
Power.After trigger pulse disappears, tup is made to return to initial position under the restoring force of high strength helical spring 3, waited under user
Subcommand.
Claims (10)
1. a kind of exciting bank for electric power pylon modal idenlification, which is characterized in that including shell (1) and be arranged in shell
(1) internal high-strength magnet (2), high strength helical spring (3), sleeve (4) and electromagnet (5)；The shell (1) is cylinder
Shape is divided into upper housing (1-1) and lower case (1-2) two parts, is connected between upper housing (1-1) and lower case (1-2) by screw thread
It connects.
2. the exciting bank according to claim 1 for electric power pylon modal idenlification, which is characterized in that the lower casing
The bottom of body (1-2) is fixed with high-strength magnet (2), and there are four wedges for setting on the side wall at lower case (1-2) bottom surface 2cm
Sub (1-4) is fixed with a partition (1-3) at the top of the lower case (1-2), and the upper surface the partition (1-3) is fixed
There are main circuit board (8).
3. the exciting bank according to claim 2 for electric power pylon modal idenlification, which is characterized in that the main electricity
Be connected on road plate (8) stretch conducting wire (5-1), the stretch conducting wire by the string holes (1-5) on partition (1-3), then with
The electromagnet (5) and shock sensors (6) of lower section connect.
4. the exciting bank according to claim 3 for electric power pylon modal idenlification, which is characterized in that described is flexible
Conducting wire (5-1) is set as spiral shape；The high-strength magnet (2) uses NdFeB material, is annulus shape.
5. the exciting bank according to claim 1 for electric power pylon modal idenlification, which is characterized in that the sleeve
(4) basal diameter is identical as high-strength magnet (2) internal diameter, is stuck in the inner hole (2-1) of high-strength magnet (2), the sleeve (4)
Top is provided with circular edge (4-1), the cylinder (4-4) of the sleeve (4), and opposite position is opened there are two through slot (4-2),
The outer diameter of the circular edge (4-1) is bigger than the interior diameter of electromagnet, and is less than the diameter of shell, in the circular edge
The lower surface of (4-1) is provided with one layer of sponge (4-3).
6. the exciting bank according to claim 1 for electric power pylon modal idenlification, which is characterized in that the sleeve
(4) outer sheath is equipped with high strength helical spring (3), and the outer diameter of the sleeve is smaller than the internal diameter of high strength helical spring (3), institute
High strength helical spring (3) one end stated is fixed on high-strength magnet (2), and the other end is connected on electromagnet (5).
7. the exciting bank according to claim 1 for electric power pylon modal idenlification, which is characterized in that the electromagnetism
The cross section of iron (5) is ring-type, is sleeved on sleeve (4), the interior diameter direction of electromagnet (5) is provided with steel plate (5-2),
The width of the steel plate (5-2) is smaller than the width of through slot (4-2), and the steel plate (5-2) is located exactly at two of sleeve (4)
In through slot (4-2), the middle position of the steel plate (5-2) is provided with a connecting rod (5-3), the connection downward vertically
The lower part of bar (5-3) is connected with shock sensors (6), and tup (7) are equipped with below the shock sensors (6).
8. the exciting bank according to claim 1 for electric power pylon modal idenlification, which is characterized in that the circuit
Plate (8) includes sequentially connected charge amplifier (8-3), MCU and bluetooth module, and the MCU (8-1) is gone back and driving circuit
The connection of (8-2) and TTL interface (8-5), the driving circuit (8-2) are connect by stretch conducting wire (5-1) with electromagnet (5),
The bluetooth module can also be connect by Bluetooth signal with mobile phone and/or computer.
9. the exciting bank according to claim 8 for electric power pylon modal idenlification, which is characterized in that the MCU
(8-1) uses fpga chip.
10. the exciting bank according to claim 8 for electric power pylon modal idenlification, which is characterized in that the MCU
(8-2) is sequentially connected with power panel (1-6) and rechargeable battery (1-7), and the power panel (1-6) is gone back and connecting terminal (1-8)
Connection, the connecting terminal (1-8) stretch out shell (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810600317.7A CN108982044A (en) | 2018-06-12 | 2018-06-12 | A kind of exciting bank for electric power pylon modal idenlification |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810600317.7A CN108982044A (en) | 2018-06-12 | 2018-06-12 | A kind of exciting bank for electric power pylon modal idenlification |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108982044A true CN108982044A (en) | 2018-12-11 |
Family
ID=64541137
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|---|---|---|---|
| CN201810600317.7A Pending CN108982044A (en) | 2018-06-12 | 2018-06-12 | A kind of exciting bank for electric power pylon modal idenlification |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110031175A (en) * | 2019-03-20 | 2019-07-19 | 东南大学 | A kind of bolt connection piece equivalent model parameter identification method based on dynamic response |
| CN114264442A (en) * | 2021-12-13 | 2022-04-01 | 湖南省潇振工程科技有限公司 | Crank block vibration excitation device for exciting wind turbine tower and mounting method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110031175A (en) * | 2019-03-20 | 2019-07-19 | 东南大学 | A kind of bolt connection piece equivalent model parameter identification method based on dynamic response |
| CN110031175B (en) * | 2019-03-20 | 2020-03-31 | 东南大学 | Bolt connecting piece equivalent model parameter identification method based on dynamic response |
| CN114264442A (en) * | 2021-12-13 | 2022-04-01 | 湖南省潇振工程科技有限公司 | Crank block vibration excitation device for exciting wind turbine tower and mounting method thereof |
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Application publication date: 20181211 |
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