CN107300412A - A kind of method of measurement bar tower vibrations mode - Google Patents
A kind of method of measurement bar tower vibrations mode Download PDFInfo
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- CN107300412A CN107300412A CN201710452101.6A CN201710452101A CN107300412A CN 107300412 A CN107300412 A CN 107300412A CN 201710452101 A CN201710452101 A CN 201710452101A CN 107300412 A CN107300412 A CN 107300412A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01H—MEASUREMENT OF MECHANICAL VIBRATIONS OR ULTRASONIC, SONIC OR INFRASONIC WAVES
- G01H9/00—Measuring mechanical vibrations or ultrasonic, sonic or infrasonic waves by using radiation-sensitive means, e.g. optical means
- G01H9/004—Measuring mechanical vibrations or ultrasonic, sonic or infrasonic waves by using radiation-sensitive means, e.g. optical means using fibre optic sensors
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- Measurement Of Mechanical Vibrations Or Ultrasonic Waves (AREA)
Abstract
The invention discloses a kind of method of measurement bar tower vibrations mode, it includes measurement scheme and mode algorithm, fibre optical sensor is installed in high-voltage transmission line pole tower main material, carry out the vibration data detection of time-space resolution, each modal intensity is decomposited by resolution of vectors algorithm using theoretical mode as base group, the technological gap of shaft tower vibration mode in-site measurement can be filled up, the data of key are provided for the operation maintenance of shaft tower.
Description
Technical field
This technology is related to the field of measuring technique of electric power line pole tower vibration, and in particular to one kind determines shaft tower mode of oscillation
Method.
Background technology
The vibration of high-voltage transmission line pole tower is the principal element for causing the aging of shaft tower tower material to damage, key position gold utensil
Abrasion or loosening are the potential causes for causing line fault.The monitoring means to this aspect hidden danger are mainly manual patrol line at present
Road and upper tower inspection abrasion and situation about loosening, its workload occupy larger proportion in the conventional maintenance work of circuit.Some are new
Monitoring means such as vibrating sensor（Displacement, acceleration etc.）Be installed on shaft tower, then can long-range shaft tower during monitoring vibration
The vibration frequency and intensity of privileged site.
Because the vibration of shaft tower is by environmental influence, the vibration mode produced by different periods is different, and every kind of
Dangerous position or vibration strong point under vibration mode are also differed, therefore it is primarily to ask to monitor its vibration mode actually occurred
Topic.Although the method that current point measurement technology can be layouted by contrasting frequency or increase obtains partial mode information,
But it is impracticable, the former locks into multiple frequencies on the complexity of shaft tower vibration frequency, frequency spectrum while occurring and modal frequency
When close, it is difficult to determine mode, the latter then needs more vibrating sensor cooperation, and can only measure and sensor peace
The mode vibration of the related specific dimension of holding position.
The content of the invention：
The technical problem to be solved in the present invention：It is an object of the invention to provide a kind of electric power line pole tower mode of oscillation measurement side
Method, solves the technical difficulty of measurement shaft tower actual vibration mode, overcomes the deficiencies in the prior art.
Technical solution of the present invention is：Distributed fiberoptic sensor is installed on shaft tower, measures each on shaft tower in each period
The vibration data of point.The oscillation space distribution of measurement is gone out into the oscillation intensity of each mode according to resolution of vectors.
Fibre optical sensor distribution therein is arranged in shaft tower main material, the external vibrating sensing detection system of optical fiber, to light
Fibre carries out the amplitude of the detection acquirement each section of correspondence shaft tower each position of random time inner fiber of time-space resolution.
Theoretical Modal Space distribution therein is provided by numerical simulation, and takes the method for Orthogonal Decomposition to measure distribution point
Solution obtains the oscillation intensity of each mode in theoretical mode.
Compared with prior art, the beneficial effects of the invention are as follows：
The present invention solves the problems, such as the detection method to shaft tower actual vibration pattern under site environment, is shaft tower Maintenance and Repair and changes
The crucial guide data of offer is provided.
Brief description of the drawings：
Fig. 1 is the overall schematic of the present invention；
Fig. 2 is detection mounting structure schematic diagram；
Fig. 3 is mode algorithm schematic diagram.
In figure：1st, shaft tower, 2, fibre optical sensor, 3, vibration detecting main frame.
Embodiment
The present invention provides a kind of method of shaft tower mode of oscillation measurement, and it is integrally illustrated such as the optical fiber on Fig. 1, including shaft tower
Sensor, detection main frame and mode algorithm.Sensor fibre is fixed in shaft tower main material by certain mode, and one end passes through light
Fine wire jumper connects vibration detecting main frame, and measurement data enters mode algorithm process and exports each mode and its intensity.
Sensor fibre can be chosen as the G652 of standard for the conventional telecommunication optical fiber of electric power, model.Detection main frame is chosen as phase
The sensitive optical time domain reflectometer in position, under the setting of phase detection, it can realize the measurement of frequency and amplitude.Detection main frame passes through
Launch specific light pulse into optical fiber, and receive the scattering light pulse never not returned in the same time with position and realize spatial distribution
Measurement.It can ensure to realize to shaft tower main material using the space exploration resolution ratio less than shaft tower king-tower material yardstick and pulse width
Spatial discrimination formula measurement everywhere, conventional arrangement is such as：Spatial resolution 1m, pulsewidth 10ns.
The mode that sensor fibre is fixed on shaft tower tower material is preferably to be used as structure by the use of communications optical cable or its light unit
Carrier, and by metal button member rigid connection to tower material, realizing effective transmission of vibration.For angle steel tower, fixed to angle steel groove
Inside, sees Fig. 2, if steel tube tower, then along steel duct rigid connection, and the wind-engaging vibration that this two kinds of structures do not interfere with shaft tower is special
Levy.Because shaft tower vibrates the main material of main influence shaft tower, sensor fibre can be laid along main material, and auxiliary material then can be without detection.Light
Fine one end is drawn from column foot, and accessing multi-core fiber in vibration detecting main frame, light unit can mutually be concatenated, and on the one hand be solved
The sensing of tower material diverging paths, on the other hand enhancing measures stability and overcomes interference fading effect.
Mode algorithm includes the necessary step of two parts and an optional supporting process, i.e.,：The generation process of theoretical mode, survey
The decomposable process and mode frequency verification process of vibration distribution are measured, Fig. 3 is seen.The generation of theoretical mode can utilize ANSYS engineerings
Software, the structural parameters of input target shaft tower set up numerical model, calculate and produce the serial mode of oscillation of this shaft tower along shaft tower master
Distribution { Vx } i of material coordinate.The vibration data of measurement is transformed on same coordinate, is formed spatial amplitude and is distributed { Mx }, and with
Mode of oscillation is distributed as base group and carries out decomposing oscillation intensity { A } i for obtaining each mode according to the orthogonal vector decomposition method of standard.It is auxiliary
It is to provide vibration frequency distribution by measurement data to help process, and obtaining the corresponding theoretical vibration frequency of each mode with above-mentioned decomposition is carried out
Compare, confirm the correctness of modal idenlification, to the obvious incongruent mode of vibration frequency, can be determined whether or directly picked
Remove, supporting process is the option of this algorithm.
The foregoing is only a specific embodiment of the invention, but protection scope of the present invention is not limited thereto, any
Those familiar with the art the invention discloses technical scope in, change or replacement can be readily occurred in, should all be contained
Cover within protection scope of the present invention, therefore, protection scope of the present invention should be based on the protection scope of the described claims.
Claims (6)
1. a kind of method of measurement bar tower vibrations mode, includes measuring method and mode algorithm, it is characterised in that：Described method
For fibre optical sensor is installed on shaft tower tower material, the data snooping of time-space resolution is carried out, is shaken by the output of resolution of vectors algorithm
Dynamic model state.
2. a kind of method of measurement bar tower vibrations mode according to claim 1, it is characterized in that：Described measuring method is to make
Rigidly laid along shaft tower main material with sensor fibre, the external vibration detecting main frame of optical fiber, the detection that optical fiber carries out time-space resolution is taken
Obtain the amplitude of each section of correspondence shaft tower each position of optical fiber.
3. a kind of method of measurement bar tower vibrations mode according to claim 1, it is characterized in that：Described mode algorithm is
The spatial distribution of the theoretical mode of oscillation amplitude of shaft tower is produced using numerical simulation, base group is used as using each mode of oscillation distribution function
Vector, decomposes to the upper each point vibration amplitude of same time of fiber-optic probe, obtains the amplitude of each mode of oscillation.
4. a kind of method of measurement bar tower vibrations mode according to claim 1 and 3, it is characterized in that：Described mode is calculated
Method includes two must step and an optional supporting process.
5. a kind of method of measurement bar tower vibrations mode according to claim 4, it is characterized in that：Described two must walk
The rapid generation process for including theoretical mode, the decomposable process and mode frequency verification process for measuring vibration distribution, theoretical mode
Generation process can utilize ANSYS engineering softwares, the structural parameters of input target shaft tower set up numerical model, calculate and produce this bar
Distribution of the serial mode of oscillation of tower along shaft tower main material coordinate；The decomposable process and mode frequency for measuring vibration distribution are authenticated
Journey is transformed on same coordinate for the vibration data of measurement, forms spatial amplitude distribution, and be distributed as base group with mode of oscillation
Orthogonal vector decomposition method according to standard carries out decomposing the oscillation intensity for obtaining each mode.
6. a kind of method of measurement bar tower vibrations mode according to claim 4, it is characterized in that：Described one is optional auxiliary
It is to provide vibration frequency distribution by measurement data to help process, and obtaining the corresponding theoretical vibration frequency of each mode with above-mentioned decomposition is carried out
Compare, confirm the correctness of modal idenlification, to the obvious incongruent mode of vibration frequency, can be determined whether or directly picked
Remove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710452101.6A CN107300412B (en) | 2017-06-15 | 2017-06-15 | Method for measuring vibration mode of tower |
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| CN201710452101.6A CN107300412B (en) | 2017-06-15 | 2017-06-15 | Method for measuring vibration mode of tower |
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| CN107300412A true CN107300412A (en) | 2017-10-27 |
| CN107300412B CN107300412B (en) | 2023-09-01 |
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Citations (24)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4525626A (en) * | 1982-03-24 | 1985-06-25 | Sperry Corporation | Fiber optic vibration modal sensor |
| US4854706A (en) * | 1987-07-27 | 1989-08-08 | Virginia Tech Intellectual Properties, Inc. | Modal domain optical fiber sensors |
| FR2666656A1 (en) * | 1990-09-11 | 1992-03-13 | Thomson Csf | Method and device for inspecting a structure by modal analysis |
| US5224182A (en) * | 1991-08-29 | 1993-06-29 | Virginia Polytechnic Institute And State University | Spatially-weighted two-mode optical fiber sensors |
| DE4427692A1 (en) * | 1994-08-04 | 1996-02-08 | Bayerische Motoren Werke Ag | Method for determining the vibration behavior of a body |
| US5572609A (en) * | 1995-09-01 | 1996-11-05 | University Of Maryland | Optical fiber vibration modal filter for flexible structures produced by the photorefractive effect |
| JP2000186956A (en) * | 1998-12-22 | 2000-07-04 | Ehime Prefecture | Optical fiber vibration mode sensor |
| US20030010128A1 (en) * | 2001-04-23 | 2003-01-16 | Buell Walter F. | Method and system for processing laser vibrometry data employing bayesian statistical processing techniques |
| CN2622684Y (en) * | 2003-05-12 | 2004-06-30 | 广东工业大学 | Novel optical fiber sensor for thin structure viberation measurement |
| US20070089519A1 (en) * | 2005-08-23 | 2007-04-26 | Georgia Tech Research Corporation | High-Q longitudinal block resonators with annexed platforms for mass sensing applications |
| JP2009229070A (en) * | 2008-03-19 | 2009-10-08 | Railway Technical Res Inst | System for monitoring structure |
| CN101614602A (en) * | 2009-08-03 | 2009-12-30 | 电子科技大学 | Electricity transmission line monitoring method and device |
| CN102042885A (en) * | 2010-10-08 | 2011-05-04 | 电子科技大学 | Device for monitoring state of power transmission line tower-line system |
| CN102506986A (en) * | 2011-12-02 | 2012-06-20 | 江苏方天电力技术有限公司 | Test system and method for mode and vibration of self-supporting tower and large-span power transmission tower |
| CN202928615U (en) * | 2012-12-14 | 2013-05-08 | 山东电力集团公司电力科学研究院 | Transmission tower strain and vibration health status on-line monitoring and remote surveillance system |
| CN103256897A (en) * | 2013-04-19 | 2013-08-21 | 武汉理工大学 | Optical fiber sensing on-line monitoring system and method for hydraulic decoking operating state of petrochemical coking tower |
| CN104007175A (en) * | 2014-05-09 | 2014-08-27 | 华南理工大学 | Multi-crack damage identification apparatus and method for cantilever flexible beam |
| CN104092308A (en) * | 2014-07-17 | 2014-10-08 | 云南电网公司技术分公司 | Transmission tower online safety monitoring system and method for stress measuring |
| CN104458079A (en) * | 2014-12-09 | 2015-03-25 | 国家电网公司 | Health monitoring method of distribution type optical fiber sensing pole and tower |
| CN104483007A (en) * | 2014-11-19 | 2015-04-01 | 华北电力大学（保定） | Overhead power transmission line vibration monitoring system and method |
| CN105277270A (en) * | 2014-07-22 | 2016-01-27 | 中国石油化工股份有限公司 | Dual-mode vibration detection system based on fiber grating sensing |
| CN105369836A (en) * | 2014-08-22 | 2016-03-02 | 天津科鉴基础工程检测有限公司 | Novel pile foundation detection method |
| CN205066932U (en) * | 2015-11-03 | 2016-03-02 | 贵州电网有限责任公司电力科学研究院 | Large -scale power transformer sound level test auxiliary device |
| CN105719071A (en) * | 2016-01-18 | 2016-06-29 | 中国电力科学研究院 | Evaluation method of safety performance of power transmission circuit under effects of strong wind |
-
2017
- 2017-06-15 CN CN201710452101.6A patent/CN107300412B/en active Active
Patent Citations (24)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4525626A (en) * | 1982-03-24 | 1985-06-25 | Sperry Corporation | Fiber optic vibration modal sensor |
| US4854706A (en) * | 1987-07-27 | 1989-08-08 | Virginia Tech Intellectual Properties, Inc. | Modal domain optical fiber sensors |
| FR2666656A1 (en) * | 1990-09-11 | 1992-03-13 | Thomson Csf | Method and device for inspecting a structure by modal analysis |
| US5224182A (en) * | 1991-08-29 | 1993-06-29 | Virginia Polytechnic Institute And State University | Spatially-weighted two-mode optical fiber sensors |
| DE4427692A1 (en) * | 1994-08-04 | 1996-02-08 | Bayerische Motoren Werke Ag | Method for determining the vibration behavior of a body |
| US5572609A (en) * | 1995-09-01 | 1996-11-05 | University Of Maryland | Optical fiber vibration modal filter for flexible structures produced by the photorefractive effect |
| JP2000186956A (en) * | 1998-12-22 | 2000-07-04 | Ehime Prefecture | Optical fiber vibration mode sensor |
| US20030010128A1 (en) * | 2001-04-23 | 2003-01-16 | Buell Walter F. | Method and system for processing laser vibrometry data employing bayesian statistical processing techniques |
| CN2622684Y (en) * | 2003-05-12 | 2004-06-30 | 广东工业大学 | Novel optical fiber sensor for thin structure viberation measurement |
| US20070089519A1 (en) * | 2005-08-23 | 2007-04-26 | Georgia Tech Research Corporation | High-Q longitudinal block resonators with annexed platforms for mass sensing applications |
| JP2009229070A (en) * | 2008-03-19 | 2009-10-08 | Railway Technical Res Inst | System for monitoring structure |
| CN101614602A (en) * | 2009-08-03 | 2009-12-30 | 电子科技大学 | Electricity transmission line monitoring method and device |
| CN102042885A (en) * | 2010-10-08 | 2011-05-04 | 电子科技大学 | Device for monitoring state of power transmission line tower-line system |
| CN102506986A (en) * | 2011-12-02 | 2012-06-20 | 江苏方天电力技术有限公司 | Test system and method for mode and vibration of self-supporting tower and large-span power transmission tower |
| CN202928615U (en) * | 2012-12-14 | 2013-05-08 | 山东电力集团公司电力科学研究院 | Transmission tower strain and vibration health status on-line monitoring and remote surveillance system |
| CN103256897A (en) * | 2013-04-19 | 2013-08-21 | 武汉理工大学 | Optical fiber sensing on-line monitoring system and method for hydraulic decoking operating state of petrochemical coking tower |
| CN104007175A (en) * | 2014-05-09 | 2014-08-27 | 华南理工大学 | Multi-crack damage identification apparatus and method for cantilever flexible beam |
| CN104092308A (en) * | 2014-07-17 | 2014-10-08 | 云南电网公司技术分公司 | Transmission tower online safety monitoring system and method for stress measuring |
| CN105277270A (en) * | 2014-07-22 | 2016-01-27 | 中国石油化工股份有限公司 | Dual-mode vibration detection system based on fiber grating sensing |
| CN105369836A (en) * | 2014-08-22 | 2016-03-02 | 天津科鉴基础工程检测有限公司 | Novel pile foundation detection method |
| CN104483007A (en) * | 2014-11-19 | 2015-04-01 | 华北电力大学（保定） | Overhead power transmission line vibration monitoring system and method |
| CN104458079A (en) * | 2014-12-09 | 2015-03-25 | 国家电网公司 | Health monitoring method of distribution type optical fiber sensing pole and tower |
| CN205066932U (en) * | 2015-11-03 | 2016-03-02 | 贵州电网有限责任公司电力科学研究院 | Large -scale power transformer sound level test auxiliary device |
| CN105719071A (en) * | 2016-01-18 | 2016-06-29 | 中国电力科学研究院 | Evaluation method of safety performance of power transmission circuit under effects of strong wind |
Non-Patent Citations (4)
| Title |
|---|
| 周玲等: "分布式光纤曲率模态传感器在薄结构振动测量中的研究", 《仪表技术与传感器》 * |
| 周玲等: "分布式光纤曲率模态传感器在薄结构振动测量中的研究", 《仪表技术与传感器》, no. 12, 25 December 2003 (2003-12-25), pages 23 - 26 * |
| 周玲等: "用于薄结构振动测量的分布式光纤模态传感器的初探", 《广东自动化与信息工程》 * |
| 周玲等: "用于薄结构振动测量的分布式光纤模态传感器的初探", 《广东自动化与信息工程》, no. 01, 30 March 2002 (2002-03-30), pages 5 - 7 * |
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| CN107300412B (en) | 2023-09-01 |
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