CN108007627B - It is a kind of using sine excitation device and video instrument and to introduce the vibratory drilling method Cable force measuring method of vibration displacement - Google Patents
It is a kind of using sine excitation device and video instrument and to introduce the vibratory drilling method Cable force measuring method of vibration displacement Download PDFInfo
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- CN108007627B CN108007627B CN201711384151.1A CN201711384151A CN108007627B CN 108007627 B CN108007627 B CN 108007627B CN 201711384151 A CN201711384151 A CN 201711384151A CN 108007627 B CN108007627 B CN 108007627B
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- rope
- vibration
- video instrument
- suo
- frequency
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- 238000006073 displacement reaction Methods 0.000 title claims abstract description 33
- 238000000034 method Methods 0.000 title claims abstract description 23
- 230000005284 excitation Effects 0.000 title claims abstract description 13
- 238000005553 drilling Methods 0.000 title claims abstract description 12
- 238000005452 bending Methods 0.000 claims description 7
- 238000000691 measurement method Methods 0.000 claims description 7
- 238000005259 measurement Methods 0.000 claims description 5
- 230000001174 ascending effect Effects 0.000 claims description 3
- 230000011218 segmentation Effects 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000011549 displacement method Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000005481 string theory Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L5/00—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes
- G01L5/04—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes for measuring tension in flexible members, e.g. ropes, cables, wires, threads, belts or bands
- G01L5/042—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes for measuring tension in flexible members, e.g. ropes, cables, wires, threads, belts or bands by measuring vibrational characteristics of the flexible member
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L5/00—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes
- G01L5/04—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes for measuring tension in flexible members, e.g. ropes, cables, wires, threads, belts or bands
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Force Measurement Appropriate To Specific Purposes (AREA)
Abstract
Description
Claims (3)
- Using sine excitation device and video instrument and the vibratory drilling method Cable force measuring method of vibration displacement, feature are introduced 1. a kind of It is, comprising the following steps:Step a: it according to drawing and field observation situation, is estimated using theoretical formula by the fundamental natural frequency f of measuring rope1Possible model Enclose [fD, fU], wherein fDFor fundamental natural frequency f1Possible range lower bound, fUFor fundamental natural frequency f1The possible range upper bound;Step b: vibration excitor is installed at the rope half length for needing to measure, and is observed in fixed bottom boundary restocking setting video instrument Record the displacement of certain a certain in a flash section of rope;Step c: the excited frequency f of vibration excitor is fixed on [f by starting vibration excitorD, fU] a certain value in range, vibration excitor is put It sets in place, and allows the ascending frequency sweep of vibration excitor excited frequency, when Suo Fasheng resonance, record exciting frequency at this time Rate is fundamental natural frequency f1;Step d: holding allows Suo Wending to resonate, and with one section of rope of video instrument irradiation rope half director's degree 2m, records this section of rope The time-histories of vibration deformation chooses this section of rope vibration deformation biggish moment, read on this section of rope by video instrument software etc. The vibration displacement numerical value of spacing pointStep e: the shift value that video instrument measurement is obtainedIt substitutes into vibration shape Suo Li identification model and acquires Suo Li, identification model table Up to formula are as follows:In formula: T is Cable force value, and EI is rope section bending stiffness, and h is vibration displacement observation point spacing, and m is unit length matter Amount, f1For the rope natural frequency of vibration,For the vibration displacement numerical value equidistantly put read by video instrument software, G0、G2、G4Respectively Coefficient is led for 0 rank, 2 ranks lead coefficient and 4 ranks lead coefficient.
- A kind of using sine excitation device and video instrument and the vibratory drilling method drag-line of vibration displacement is introduced 2. according to claim 1 Cable force measurement method, which is characterized in that the theoretical formula in step a are as follows:F in formulaDFor fundamental natural frequency f1Possible range lower bound, fUFor fundamental natural frequency f1The possible range upper bound, L are that rope is long, EI is rope section bending stiffness, and m is unit linear mass, T1For the rope tensility lower limit value estimated, T2For the rope tensility upper limit estimated Value.
- A kind of using sine excitation device and video instrument and the vibratory drilling method drag-line of vibration displacement is introduced 3. according to claim 1 Cable force measurement method, which is characterized in that the vibration displacement number equidistantly put on this section of rope is read by video instrument software in step d Value, puts 0.01~0.1m of spacing h value range by required points no less than 16.
Priority Applications (1)
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CN201711384151.1A CN108007627B (en) | 2017-12-20 | 2017-12-20 | It is a kind of using sine excitation device and video instrument and to introduce the vibratory drilling method Cable force measuring method of vibration displacement |
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CN201711384151.1A CN108007627B (en) | 2017-12-20 | 2017-12-20 | It is a kind of using sine excitation device and video instrument and to introduce the vibratory drilling method Cable force measuring method of vibration displacement |
Publications (2)
Publication Number | Publication Date |
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CN108007627A CN108007627A (en) | 2018-05-08 |
CN108007627B true CN108007627B (en) | 2019-10-25 |
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Families Citing this family (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN108955983A (en) * | 2018-07-25 | 2018-12-07 | 湖南大学 | Cable tension test method based on the drag-line vibration shape and photogrammetric technology |
CN109063351B (en) * | 2018-08-10 | 2023-06-23 | 武汉理工大学 | Cable-stayed bridge cable force calculation method under influence of adjusting sleeve |
CN109341903B (en) * | 2018-11-08 | 2020-10-02 | 东南大学 | Inhaul cable force measuring method based on edge recognition in computer vision |
CN110608833A (en) * | 2019-09-12 | 2019-12-24 | 江苏方天电力技术有限公司 | System and method for measuring axial force of pull rod under thermal state condition |
CN111649857A (en) * | 2020-04-23 | 2020-09-11 | 河海大学 | Inhaul cable modal measurement method for target matching analysis |
CN114353861B (en) * | 2021-12-02 | 2024-07-09 | 中国矿业大学 | Comprehensive detection device and method for suspension bridge sling and cable clamp state |
CN115452226B (en) * | 2022-10-05 | 2023-12-19 | 大连理工大学 | Cable force recognition algorithm considering semi-rigid constraint at two ends |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR100343279B1 (en) * | 1999-04-28 | 2002-07-11 | 장승필 | A Measuring Method of Cable Tension Using the Dynamic Characteristics of Cable |
CN101893497B (en) * | 2010-06-13 | 2012-01-11 | 东南大学 | Out-of-plane frequency method for testing cable force of planar cable rod system |
CN101900620B (en) * | 2010-06-23 | 2012-05-23 | 华南理工大学 | Method for identifying variable boundary cable force of medium or long cable |
CN104502010A (en) * | 2014-10-15 | 2015-04-08 | 徐辉 | Method and device for cable force test in unknown boundary condition |
CN104933254B (en) * | 2015-06-25 | 2017-12-08 | 哈尔滨开博科技有限公司 | Modified linear mixture model vibratory drilling method cable force measurement method based on frequency ratio deviation ratio |
CN107144388B (en) * | 2017-05-17 | 2022-09-23 | 苏交科集团股份有限公司 | Global peak searching method for flexible rope vibration frequency |
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Effective date of registration: 20231008 Address after: Room 1002, Unit 4, Building 10, East Zone, Zhaofeng Jiayuan, Shahe Town, Changping District, Beijing 102200 Patentee after: Li Dajun Address before: No. 101, 1st Floor, Harbin Institute of Technology Science Park Building, No. 434 Youyou Street, Nangang District, Harbin City, Heilongjiang Province, 150000 Patentee before: HARBIN KAIBO TECHNOLOGY CO.,LTD. |
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Effective date of registration: 20240104 Address after: Room 1411, No. 2, Houzhuang Section, Zhaosi Road, Zhangzhen, Shunyi District, Beijing, 101300 Patentee after: Hualu Youdao (Beijing) Information Technology Co.,Ltd. Address before: Room 1002, Unit 4, Building 10, East Zone, Zhaofeng Jiayuan, Shahe Town, Changping District, Beijing 102200 Patentee before: Li Dajun |
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