WO2021098879A1 - Dispositif et système de surveillance de desserrage de boulon ou d'écrou - Google Patents

Dispositif et système de surveillance de desserrage de boulon ou d'écrou Download PDF

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Publication number
WO2021098879A1
WO2021098879A1 PCT/CN2020/130880 CN2020130880W WO2021098879A1 WO 2021098879 A1 WO2021098879 A1 WO 2021098879A1 CN 2020130880 W CN2020130880 W CN 2020130880W WO 2021098879 A1 WO2021098879 A1 WO 2021098879A1
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WIPO (PCT)
Prior art keywords
bolt
optical fiber
nut
deformation sensor
fiber deformation
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PCT/CN2020/130880
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English (en)
Chinese (zh)
Inventor
张建平
黄春华
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奥动新能源汽车科技有限公司
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Publication of WO2021098879A1 publication Critical patent/WO2021098879A1/fr

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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
    • G01B11/00—Measuring arrangements characterised by the use of optical techniques
    • G01B11/16—Measuring arrangements characterised by the use of optical techniques for measuring the deformation in a solid, e.g. optical strain gauge
    • G01B11/18—Measuring arrangements characterised by the use of optical techniques for measuring the deformation in a solid, e.g. optical strain gauge using photoelastic elements
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
    • F03D—WIND MOTORS
    • F03D17/00—Monitoring or testing of wind motors, e.g. diagnostics
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
    • G01B11/00—Measuring arrangements characterised by the use of optical techniques
    • G01B11/16—Measuring arrangements characterised by the use of optical techniques for measuring the deformation in a solid, e.g. optical strain gauge
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
    • G01B11/00—Measuring arrangements characterised by the use of optical techniques
    • G01B11/26—Measuring arrangements characterised by the use of optical techniques for measuring angles or tapers; for testing the alignment of axes

Definitions

  • This application relates to a technology for monitoring the state of a fixed bolt or nut, and in particular to a device and system for monitoring the looseness of a bolt or nut.
  • the technical problem to be solved by this application is to overcome the defect of bolt or nut looseness monitoring in the prior art and provide a bolt or nut looseness monitoring device and system.
  • a device for monitoring the looseness of bolts or nuts The bolt or nut is used to fasten on a base, and the bolt or nut has a non-circular head.
  • the device for monitoring looseness includes:
  • the optical fiber deformation sensor has a deformation sensing section
  • the supporting device is provided on the base and used to support the optical fiber deformation sensor
  • the deformation sensing section of the optical fiber deformation sensor is set to be located on the non-circular head The corresponding position of, so that the deformation sensing section deforms when the non-circular head rotates.
  • the looseness monitoring device further includes a mounting base, the mounting base includes a fixing part and an accommodating part, the fixing part is used for fixing the supporting device, and the accommodating part is used for accommodating the bolt or nut.
  • the receiving portion is specifically a through hole
  • the mounting base is sleeved on the bolt or nut through the through hole.
  • the supporting device includes two supporting frames;
  • the support frame is provided with grooves, the two ends of the optical fiber deformation sensor are provided with limit parts, the two ends of the optical fiber deformation sensor are respectively fixedly arranged in the grooves of the support frame, and the limit parts are connected with The outer side wall of the groove of the support frame is attached;
  • the supporting frame is provided with a clamping part
  • the two ends of the optical fiber deformation sensor are fixedly provided with connection parts
  • the connection parts at both ends of the optical fiber deformation sensor are respectively clamped in the clamping parts on the supporting frame.
  • the head of the bolt or nut has a polygonal shape, and the deformation sensing section of the optical fiber deformation sensor is attached to one side of the head.
  • a bolt or nut looseness monitoring system includes at least one of the aforementioned bolt or nut looseness monitoring devices, and the looseness monitoring system further includes a signal analysis device and a laser emitting device;
  • the signal analysis device and the laser emitting device are respectively communicatively connected with the optical fiber deformation sensor in the looseness monitoring device;
  • the laser emitting device is used to emit laser light to the optical fiber deformation sensor;
  • the signal analysis device is used to receive and analyze the optical signal returned by the optical fiber deformation sensor, and determine the loose bolt or nut according to the analysis result.
  • a first corresponding relationship between the number of the optical fiber deformation sensor and the number of the bolt or nut, and a second corresponding relationship between the number of the optical fiber deformation sensor and the sensitive wavelength band are pre-stored in the signal analysis device;
  • the signal analysis device is used to analyze the center wavelength of the optical signal returned by the optical fiber deformation sensor, determine the number of the optical fiber deformation sensor according to the center wavelength of the optical signal and the second correspondence, and then determine the number of the optical fiber deformation sensor according to the optical fiber
  • the serial number of the deformation sensor and the first corresponding relationship determine the serial number of the bolt or nut corresponding to the optical signal.
  • the signal analysis device is also used to calculate the loosening angle of the loose bolt or nut according to the analysis result;
  • the signal analysis device also prestores a third correspondence between the number of the optical fiber deformation sensor and the standard center wavelength of the sensitive wavelength band;
  • the signal analysis device determines the standard center wavelength of the optical fiber deformation sensor according to the number of the optical fiber deformation sensor and the third correspondence, and then compares the center wavelength of the optical signal returned by the optical fiber deformation sensor to the standard center. The wavelength is compared, and the looseness angle of the bolt or nut corresponding to the optical signal is calculated.
  • the looseness monitoring system further includes an alarm device; the alarm device and the signal analysis device are in communication connection;
  • the alarm device is used to receive data uploaded by the signal analysis device.
  • the data includes the number of the bolt or nut and the loosening angle generated by the bolt or nut. When the loosening angle exceeds a threshold, it generates and Describe the alarm signal corresponding to the number of the bolt or nut.
  • the looseness monitoring system further includes an alarm device; the alarm device and the signal analysis device are in communication connection;
  • the alarm device is used for when the data uploaded by the signal analysis device is not received within a preset time period, the data includes the number of the bolt or nut, and the number of the bolt or nut that has not been received is generated. The corresponding alarm signal.
  • the positive progress effect of this application lies in the fact that the bolt or nut looseness monitoring device and system provided by this application realize the bolt or nut looseness monitoring, and can detect the looseness and fracture of the bolt or nut in time, so as to facilitate timely maintenance and improve wind power generation.
  • the scientificity and reliability of machine inspection and maintenance have realized the function of automatic monitoring of bolt or nut status.
  • Fig. 1 is a schematic structural diagram of a bolt looseness monitoring device of embodiment 1 of the application.
  • FIG. 2 is a schematic diagram of the structure of the mounting base of Embodiment 1 of the application.
  • Example 3 is a schematic diagram of the position structure when the bolt of Example 1 of the application is not loosened.
  • FIG. 4 is a schematic diagram of the position structure when the bolts of Embodiment 1 of the application are loosened.
  • 5a and 5b are schematic diagrams of another installation structure of the optical fiber deformation sensor according to Embodiment 1 of the present application.
  • Fig. 6 is a schematic structural diagram of a device for monitoring looseness of multiple bolts according to Embodiment 1 of the application.
  • FIG. 7 is a schematic structural diagram of a bolt looseness monitoring system according to Embodiment 2 of the application.
  • FIG. 1 a schematic structural diagram of a bolt looseness monitoring device of embodiment 1 of the present application.
  • the bolt looseness monitoring device includes an optical fiber deformation sensor 1 and a supporting device 3.
  • the optical fiber deformation sensor 1 has a deformation sensing section 12, and the monitored bolt 2 is used to fasten on the base.
  • the tested bolt 2 is a hexagonal bolt with a hexagonal head.
  • the deformation sensing section 12 of the optical fiber deformation sensor is set to be close to the hexagonal bolt.
  • the head of the bolt to be monitored in the bolt looseness monitoring device of the present application may also be quadrangular or any other non-circular shape.
  • the bolt looseness monitoring device of this embodiment simultaneously uses two optical fiber deformation sensors 1 to monitor the looseness of the same bolt.
  • Two optical fiber deformation sensors 1 are arranged in parallel on opposite sides of the hexagonal head of the hexagonal bolt 2, and the deformation sensing sections 12 of the two optical fiber deformation sensors are respectively attached to one side of the hexagonal head of the hexagonal bolt 2.
  • the number and arrangement of the optical fiber deformation sensors 1 in the bolt looseness monitoring device of this embodiment are not limited to this embodiment. Any method that monitors the bolt looseness by the deformation sensing section 12 of the optical fiber deformation sensor is essentially The scope of protection of this application.
  • the supporting device 3 is arranged on the base for supporting the optical fiber deformation sensor 1.
  • the supporting device 3 includes two supporting frames 31; the supporting frame 31 is provided with grooves 32, and the two ends of the optical fiber deformation sensor 1 are provided with limit parts 11, and the optical fiber The two ends of the deformation sensor 1 are respectively fixedly arranged in the groove 32 of the support frame, and the limiting portion 11 is attached to the outer side wall of the groove 32 of the support frame for fixing the optical fiber deformation sensor 1.
  • the supporting frame 31 may also be provided with a clamping part, the two ends of the optical fiber deformation sensor 1 may also be fixedly provided with connection parts, and the connection parts at both ends of the optical fiber deformation sensor 1 are respectively clamped to the supporting frame In the engaging part on 31, the purpose of fixing the optical fiber deformation sensor 1 is realized.
  • the bolt looseness monitoring device of this embodiment further includes a mounting base 4 on which the mounting base 4 is arranged; and the supporting device 3 is fixed on the mounting base 4.
  • the supporting device 3 in the bolt looseness monitoring device of this embodiment can also be directly fixed on the base by fixing glue or bolts.
  • the mounting base 4 includes a fixing portion 41 and a receiving portion 42, the fixing portion 41 is used to fix the supporting device 3, and the receiving portion 42 is used to receive the bolt 2.
  • the receiving portion 42 on the mounting base 4 is specifically a through hole, and the mounting base 4 is sleeved on the bolt 2 through the through hole.
  • the bolt looseness monitoring device of this embodiment includes two optical fiber deformation sensors 1.
  • the optical fiber deformation sensors 1 are fixed on both sides of the support frame 31 on the mounting base 4, and the two optical fiber deformation sensors 1 are arranged in parallel and tightened with the hexagonal bolts 2. The surfaces are parallel.
  • the deformation sensing section 12 of the optical fiber deformation sensor will not be stressed, and will only expand and contract slightly under the influence of temperature. At this time, the deformation signal output by the optical fiber deformation sensor 1 is none or Output weak deformation signal.
  • FIG. 4 a schematic diagram of the position structure when the bolts of Embodiment 1 of the present application are loosened.
  • the parallel surface of the hexagonal bolt 2 rotates, and the hexagonal sharp corner of the bolt 2 causes the deformation sensing section 12 of the optical fiber deformation sensor to deform or even break.
  • the optical fiber deformation sensor 1 outputs a large deformation signal or the output signal is missing.
  • the hexagonal sharp angle of the bolt 2 deforms the deformation sensing section 12 of the optical fiber deformation sensor by 3.5 mm or the deformation sensing section 12 of the optical fiber deformation sensor is pulled off.
  • the optical fiber deformation sensor 1 If a large deformation signal is output or the output signal is missing, it indicates that the bolt 2 is loose. Considering the uncertainty of a single sensor, two fiber-optic deformation sensors 1 are used to monitor at the same time, and the sensing points are the same. If the deformation signals output by the two fiber-optic deformation sensors 1 have the same amount of change, it indicates that the bolt 2 under test is loose, and the measurement results are backstaged Analysis to make the test results more reliable.
  • FIG. 5a another installation structure schematic diagram of the optical fiber deformation sensor of embodiment 1 of the present application.
  • the two ends of the optical fiber deformation sensor 1 are bent, and the deformation sensing section 12 is attached to one side of the head of the bolt 2 to adapt to Different installation space.
  • FIG. 5b another installation structure schematic diagram of the optical fiber deformation sensor of Embodiment 1 of the present application.
  • Two optical fiber deformation sensors 1 are arranged in parallel on the same support frame, and both ends of the two optical fiber deformation sensors 1 are bent at the same time.
  • the deformation sensing sections 12 of the two sensors are attached to one side of the head of the bolt 2 at the same time to adapt to different installation spaces and at the same time provide test reliability.
  • one bolt is monitored by two sensors at the same time, so as to ensure that the normal operation of the monitoring can still be guaranteed in the special case of a sensor failure, and the purpose of improving the accuracy and reliability of the test is achieved. .
  • the bolt looseness monitoring device of this embodiment is also applicable to the looseness monitoring of nuts, which have non-circular heads.
  • FIG. 6 a schematic structural diagram of a monitoring device for loosening multiple bolts according to an embodiment of the present application.
  • the looseness monitoring device includes a number of looseness monitoring devices for the above-mentioned bolts, each of which is fixed on the base, and the looseness monitoring device for each bolt includes two optical fiber deformation sensors 1, the two optical fibers
  • the deformation sensor 1 is arranged in parallel on the opposite side of the hexagonal bolt 2.
  • the deformation sensing sections 12 of the two fiber optic deformation sensors 1 are respectively close to one side of the hexagonal bolt 2, and the deformation sensing section 12 is generated when the hexagonal bolt 2 is loosened. Deformation, the optical fiber deformation sensor 1 outputs a deformation signal.
  • the above-mentioned bolt looseness monitoring device is installed at the key bolts to realize automatic online monitoring of the bolt status.
  • FIG. 7 a schematic structural diagram of a bolt looseness monitoring system in Embodiment 2 of the present application.
  • the system includes several bolt looseness monitoring devices 100 in Embodiment 1.
  • the looseness monitoring system also includes a signal analysis device 200 and a laser Launch device 300;
  • the signal analysis device 200 is in communication connection with the optical fiber deformation sensor in the looseness monitoring device 100;
  • the laser emitting device 300 is in communication connection with the optical fiber deformation sensor in the looseness monitoring device 100;
  • the laser emitting device 300 is used to emit laser light to the optical fiber deformation sensor; the signal analysis device 200 is used to receive and analyze the optical signal returned by the optical fiber deformation sensor, and determine the loose bolt or nut according to the analysis result.
  • the communication connection between the signal analysis device 200 and the optical fiber strain sensor is a wired communication connection.
  • the signal analysis device 200 prestores the first corresponding relationship between the number of the optical fiber deformation sensor and the number of the bolt, the second corresponding relationship between the number of the optical fiber deformation sensor and the sensitive wavelength band, and the number of the optical fiber deformation sensor and the first corresponding relationship of the standard center wavelength of the sensitive wavelength band. Three correspondences.
  • Each optical fiber deformation sensor has sensitivity corresponding to a specific wavelength of light, and the sensitivity means that the optical fiber deformation sensor reflects or diffracts light energy of a specific wavelength.
  • the signal analysis device 200 uses a frequency sweep laser, which has the function of rapid wavelength scanning, and can work at any optional wavelength, from a specified start wavelength to a specified end wavelength for linear wavelength scanning at a specified speed, and a frequency sweep laser is used Analyzing the optical signal returned by the optical fiber deformation sensor can obtain the central wavelength of the optical signal.
  • the optical fiber deformation sensor receives the laser light emitted by the laser emitting device 300, it reflects or diffracts light of a certain wavelength.
  • the signal analysis device 200 analyzes the received optical signal returned by the optical fiber deformation sensor, and when the center wavelength of the optical signal returned by the optical fiber deformation sensor is scanned, it will search for the second correspondence between the number of the optical fiber deformation sensor and the sensitive wavelength band, and find the center Which sensitive waveband the wavelength is in to determine the number of the optical fiber deformation sensor. Then, the number of the bolt is determined by searching for the first corresponding relationship between the number of the optical fiber deformation sensor and the number of the bolt.
  • the bolts are set with numbers during installation, such as L1, L2 to Ln; the two optical fiber deformation sensors on each bolt are also set with numbers, such as T1a and T1b, T2a and T2b to Tna and Tnb; the optical fiber deformation number is T1a
  • the sensor can reflect or diffract 332nm light, and the optical fiber deformation sensor numbered T1b can reflect or diffract light with a center wavelength of 352nm. Therefore, when the signal analysis device 200 analyzes that the center wavelength of the optical signal returned by the received optical fiber deformation sensor is 332nm, find the sensitive wavelength band of the 332nm, and then through the first correspondence relationship, it can be determined that it is the optical fiber deformation sensor numbered T1a. In this way, the number of the optical fiber deformation sensor is determined, and the bolt number corresponding to the optical fiber deformation sensor with the number T1a is determined to be L1 by searching for the second corresponding relationship.
  • the signal analysis device 200 is also used to calculate the loosening angle of the loose bolt according to the optical signal returned by the optical fiber deformation sensor.
  • the signal analysis device 200 compares the center wavelength of the optical signal returned by the optical fiber deformation sensor with the standard center wavelength of the sensitive band according to the center wavelength of the optical signal returned by the optical fiber deformation sensor, calculates the looseness angle of the corresponding bolt, and then searches The third correspondence between the number of the optical fiber deformation sensor and the standard center wavelength of the sensitive waveband determines the number of the optical fiber deformation sensor, and then determines the looseness angle of the corresponding bolt.
  • the center wavelength of the optical signal reflected by it will shift, but the center wavelength of the optical signal reflected by each optical fiber deformation sensor will shift.
  • the quantity is limited. In this embodiment, it is ensured that the center wavelength of the optical signal reflected by each optical fiber deformation sensor does not coincide when the maximum deviation occurs. Therefore, when the center wavelength of the optical signal returned by the optical fiber deformation sensor received by the signal analysis device 200 is shifted, the number of the optical fiber deformation sensor that reflects the light can also be determined; for example, the number of the optical fiber deformation sensor received by the signal analysis device 200 can be determined.
  • the central wavelength of the optical signal is 334nm.
  • the wavelength of 334nm is the maximum deviation range of the central wavelength of the optical signal reflected by the optical fiber deformation sensor numbered T1a.
  • the optical fiber deformation sensor numbered T1a is deformed.
  • the central wavelength of the optical signal returned by the optical fiber deformation sensor numbered T1a is 334nm minus the standard of its sensitive wavelength band.
  • the central wavelength of 332nm indicates that the optical fiber deformation sensor numbered T1a has a deformation of 2nm, and the bolt is loosened by 5°. Then, according to the corresponding number of the optical fiber deformation sensor and the bolt, the bolt number is obtained to determine which bolt has loosened.
  • the bolt looseness monitoring system in this embodiment also includes an alarm device 400, which is wirelessly connected to the signal analysis device 200; the data analyzed by the signal analysis device 200 includes the number of the bolt and the looseness angle generated by the bolt; the signal analysis device The data parsed by 200 is uploaded to the alarm device 400.
  • the alarm device 400 determines whether the loosening angle of the bolt exceeds a preset threshold. If it exceeds the preset threshold, the alarm device 400 generates an alarm signal corresponding to the bolt number; If the alarm device 400 does not receive the data uploaded by the signal analysis device 200 within the preset time period, assuming that the preset time is 10 seconds, it will generate an alarm signal corresponding to the number of the bolt that has not been received.
  • the deformation sensing section of the optical fiber deformation sensor does not break and deforms.
  • the signal analysis device 200 receives the deformation signal output by the optical fiber deformation sensor, and the preset bolt looseness angle threshold is 5°.
  • the looseness angle received by the alarm device 400 is greater than 5°, the bolt is considered to be loose, and the alarm device 400 generates an alarm signal and sends it to the operator.
  • the operator issues maintenance instructions and monitors the subsequent looseness. If a bolt is loosened, the deformation sensing sections of the optical fiber deformation sensor on both sides of the bolt will be stretched and deformed. The limit of the deformation sensing section of the stretched optical fiber deformation sensor is that the deformation sensing section of the sensor is broken.
  • the signal analysis device 200 detects signal loss. If the signal analysis device 200 detects that the signal output by the optical fiber deformation sensor is missing, that is, the deformation sensing section of the optical fiber deformation sensor is broken, it means that the corresponding bolt is loosened, and the sensor should be repaired and replaced. At this time, the signal analysis device 200 Determine the number of the normal optical fiber deformation sensor according to the optical signal returned by the received optical fiber deformation sensor to determine the number of the broken optical fiber deformation sensor, and then determine that a specific bolt or bolts of a certain number are loose, and the alarm device 400 An early warning is issued to the operator, and the operator issues maintenance instructions.
  • the loosening of a bolt will continue, and the optical fiber deformation sensor will continue to detect the deformation data, so when the bolt looseness angle is detected to be small, you can also do the maintenance record first and continue the monitoring. Moreover, the loosening of one bolt will cause the other bolts to be loosened at the same time. At this time, the signal analysis device 200 can fully record the loosening information of all the bolts.
  • two optical fiber deformation sensors are added to key bolts such as fan blades and fixed bases.
  • the optical fiber deformation sensor outputs a deformation signal when the deformation sensing section is deformed; the output signals of all optical fiber deformation sensors It is transmitted to the signal analysis device 200, and the signal analysis device 200 transmits the signal of each point through Wi-Fi (Wireless Fidelity, mobile hotspot) signal to the wind turbine operator for data analysis, discovers problems in time, and repairs after warning, without blindness and purposelessness maintain.
  • Wi-Fi Wireless Fidelity, mobile hotspot
  • one bolt is monitored by two sensors at the same time to ensure that the normal operation of the monitoring can still be guaranteed in the special case of a sensor failure, and the purpose of improving the accuracy and reliability of the test is achieved. .

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  • Engineering & Computer Science (AREA)
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  • Sustainable Development (AREA)
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Abstract

L'invention concerne un dispositif et un système de surveillance de desserrage d'un boulon (2) ou d'un écrou. Le boulon (2) ou l'écrou est utilisé pour être fixé sur une base, et le boulon (2) ou l'écrou est pourvu d'une tête non circulaire. Le dispositif de surveillance de desserrage comprend des capteurs de déformation de fibre optique (1) et des dispositifs de support (3). Les capteurs de déformation de fibre optique (1) sont chacun pourvus d'une section de détection de déformation (12), les dispositifs de support (3) sont disposés sur la base et utilisés pour supporter les capteurs de déformation de fibre optique (1), et les sections de détection de déformation (12) des capteurs de déformation de la fibre optique (1) sont conçus pour être situés dans des positions correspondantes de la tête non circulaire, de telle sorte que les sections de détection de déformation (12) se déforment lorsque la tête non circulaire tourne. Le dispositif et le système de surveillance de desserrage du boulon (2) ou de l'écrou permettent une surveillance et un contrôle de desserrage du boulon (2) ou l'écrou, peuvent détecter les situations de desserrage et de rupture du boulon (2) ou de l'écrou à temps de façon à faciliter la maintenance en temps opportun, améliorer le caractère scientifique et la fiabilité de l'inspection et de la maintenance d'un aérogénérateur, et effectuer la surveillance automatique de l'état du boulon (2) ou de l'écrou.
PCT/CN2020/130880 2019-11-22 2020-11-23 Dispositif et système de surveillance de desserrage de boulon ou d'écrou WO2021098879A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN201911153767.7A CN112833805A (zh) 2019-11-22 2019-11-22 螺栓或螺母的松动监测装置及系统
CN201911153767.7 2019-11-22

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CN114263571A (zh) * 2021-12-01 2022-04-01 东方电气风电股份有限公司 一种用于风电机组监控塔筒螺栓松动的系统及方法

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CN115046494B (zh) * 2022-06-02 2023-03-31 重庆大学 基于分布式形状传感的螺纹结构松动测量装置
CN115331398B (zh) * 2022-07-05 2023-05-16 中国长江电力股份有限公司 一种水轮发电机组蜗壳进入门螺栓智能监测装置及方法

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CN109058054A (zh) * 2018-07-19 2018-12-21 湖北民族学院 一种风电发电机组的螺栓在线监测系统及方法
CN109269433A (zh) * 2018-08-03 2019-01-25 武汉理工大学 一种基于光纤光栅传感带温度自补偿的卡箍松动自监测装置及方法
CN110220682A (zh) * 2019-05-30 2019-09-10 苏州热工研究院有限公司 用于监测螺栓松动的监测装置和监测方法
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CN114263571A (zh) * 2021-12-01 2022-04-01 东方电气风电股份有限公司 一种用于风电机组监控塔筒螺栓松动的系统及方法
CN114263571B (zh) * 2021-12-01 2023-10-20 东方电气风电股份有限公司 一种用于风电机组监控塔筒螺栓松动的系统及方法

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