CN110589686A - Fatigue monitoring method for large tower crane cable based on FBG (fiber Bragg Grating) sensor - Google Patents
Fatigue monitoring method for large tower crane cable based on FBG (fiber Bragg Grating) sensor Download PDFInfo
- Publication number
- CN110589686A CN110589686A CN201910868739.7A CN201910868739A CN110589686A CN 110589686 A CN110589686 A CN 110589686A CN 201910868739 A CN201910868739 A CN 201910868739A CN 110589686 A CN110589686 A CN 110589686A
- Authority
- CN
- China
- Prior art keywords
- optical cable
- fiber grating
- grating sensor
- optical
- port
- 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.)
- Pending
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
- B66C13/00—Other constructional features or details
- B66C13/16—Applications of indicating, registering, or weighing devices
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
- B66C15/00—Safety gear
Abstract
The invention discloses a fatigue monitoring method of a large tower crane cable based on an FBG sensor, which comprises an optical signal transmitting end and an optical signal transmitting port, one end of the optical signal transmitting end is provided with an optical signal transmitting port, one end of the optical cable input module is provided with an optical cable input port, the optical signal transmitting end and the optical cable input module are connected by inserting an input optical cable at the optical signal transmitting port and the optical cable input port, the other end of the optical cable input module is provided with a branching port, one end of the optical cable terminal I is provided with a branching output port, the optical cable input module and the branching port are connected by being plugged in the branching port and the branching output port through the fiber bragg grating sensor, so that the optical cable input module is convenient to be connected with a computer, is convenient to form a telemetering network with an optical fiber transmission system, and has a series of advantages of light weight, small size, capability of being bent randomly within a certain range and the like.
Description
Technical Field
The invention belongs to the technical field related to monitoring of large-scale production equipment, and particularly relates to a fatigue monitoring method for a large-scale tower crane cable based on an FBG (fiber Bragg Grating) sensor.
Background
The tower crane cable has a failure mode that cracks are initiated and expanded and sudden fracture is caused under the repeated action of alternating stress lower than the tensile strength limit, namely fatigue failure, in an engineering structure, the fatigue failure phenomenon is very extensive, the cable is generally existed in each structural component bearing repeated load, according to the investigation, 50% -90% of mechanical failure is caused by fatigue, a tower crane cable bridge is acted by various alternating loads, the fatigue problem is an old and basic problem of the safety production of the tower crane, the cable is an important component part of the tower crane, is a direct bearing component of the tower crane and bears the repeated action of various loads, and under the repeated action of the alternating loads, the cable can seriously influence the production safety due to fatigue.
The existing tower crane cable fatigue monitoring method has the following problems: the conventional sensor is adopted to monitor the surface fatigue degree, namely when the tower crane cable has tiny fatigue changes, the conventional sensor cannot accurately monitor the changes, tiny changes are easily ignored in the monitoring process, and then hidden dangers are buried for safety production.
Disclosure of Invention
The invention aims to provide a fatigue monitoring method of a large tower crane cable based on an FBG (fiber Bragg Grating) sensor, which aims to solve the problem that the conventional tower crane cable fatigue monitoring method provided in the background technology adopts a conventional sensor to monitor the surface fatigue degree, namely when the tower crane cable has tiny fatigue change, the conventional sensor cannot accurately monitor the change, the tiny change is easily ignored in the monitoring process, and then hidden danger is buried in safety production.
In order to achieve the purpose, the invention provides the following technical scheme:
a fatigue monitoring method of a large tower crane cable based on an FBG sensor comprises an optical signal transmitting end and an optical signal transmitting port, wherein one end of the optical signal transmitting end is provided with an optical signal transmitting port, one end of an optical cable input module is provided with an optical cable input port, the optical signal transmitting end and the optical cable input module are connected by inserting an input optical cable into the optical signal transmitting port and the optical cable input port, the other end of the optical cable input module is provided with a branching port, one end of an optical cable terminal I is provided with a branching output port, the optical cable input module and the branching port are connected by inserting an optical fiber grating sensor into the branching port and the branching output port, the other end of the optical cable terminal I is provided with an optical cable terminal I output port, one end of an optical cable terminal II is provided with an optical cable terminal II input port, the optical cable terminal I and the optical cable terminal II are connected by splicing a bus optical cable at an output port of the optical cable terminal I and an input port of the optical cable terminal II, the other end of the optical cable terminal II is provided with an output port of the optical cable terminal II, one end of the photoelectric signal conversion module is provided with an input port of the photoelectric signal conversion module, the optical cable terminal II and the photoelectric signal conversion module are connected by splicing a connecting optical cable at an output port of the optical cable terminal II and an input port of the photoelectric signal conversion module, the other end of the photoelectric signal conversion module is provided with an output port of the photoelectric signal conversion module, one end of the data acquisition and analysis module is provided with an input port of the data acquisition and analysis module, and the photoelectric signal conversion module and the data acquisition and analysis module are connected by splicing a cable at an output port of the, the other end of data acquisition analysis module is provided with data acquisition analysis module output port, the one end of digital display module is provided with digital display module input port, data acquisition analysis module and digital display module input port are pegged graft in digital display module and data acquisition analysis module output port department through the digital display connecting wire and are connected, the fiber grating sensor includes temperature fiber grating sensor, pressure fiber grating sensor, strain force fiber grating sensor and displacement fiber grating sensor, the one end of optical cable input module is provided with four group's branch line ports altogether, branch line port department has connected gradually temperature fiber grating sensor, pressure fiber grating sensor, strain force fiber grating sensor and displacement fiber grating sensor, the one end of optical cable terminal one is provided with four group's branch line output ports altogether, branch line output port department has connected gradually temperature fiber grating sensor according to established connection order, and the one end of optical cable terminal is provided with four group's, The other end of the pressure fiber grating sensor, the other end of the strain force fiber grating sensor and the other end of the displacement fiber grating sensor.
Preferably, the optical signal transmitting end, the optical cable input module, the fiber grating sensor, the optical cable terminal I, the optical cable terminal II, the photoelectric signal conversion module, the data acquisition and analysis module and the digital display module are main flow components in the overall monitoring process.
Preferably, temperature fiber grating sensor, pressure fiber grating sensor, strain force fiber grating sensor and displacement fiber grating sensor all imbed in the inside of cable, temperature fiber grating sensor, pressure fiber grating sensor, strain force fiber grating sensor and displacement fiber grating sensor all are fixed in the hollow gap department of cable through injection glue.
Preferably, the fiber grating sensor must be embedded inside the cable, and the fiber grating sensor must not be attached to the outer surface of the cable for monitoring operations.
Preferably, the photoelectric signal conversion module, the data acquisition and analysis module and the digital display module are electric signal analysis modules, the cable and the digital display connecting wire are live wires, optical signals measured by the fiber grating sensor can be displayed through the digital display module, and the optical signals measured by the fiber grating sensor can be digitally displayed to the digital display module after being subjected to system analysis through the data acquisition and analysis module.
Preferably, the input optical cable, the bus optical cable and the connecting optical cable can be bent in a small range, and the input optical cable, the bus optical cable and the connecting optical cable cannot be bent.
Preferably, the first optical cable terminal and the second optical cable terminal are both optical cable terminals, the first optical cable terminal is an external optical cable terminal, and the second optical cable terminal is an internal optical cable terminal of the environment where the monitoring equipment is located.
Preferably, the values of the optical cables at the left and right ends of the input optical cable, the bus optical cable, the connection optical cable and the fiber grating sensor are all indeterminate values, and the lengths of the optical cables at the left and right ends of the input optical cable, the bus optical cable, the connection optical cable and the fiber grating sensor can be extended or contracted according to actual needs
Compared with the prior art, the invention provides a fatigue monitoring method of a large tower crane cable based on an FBG sensor, which has the following beneficial effects:
the basic idea of the fiber grating sensing cable fatigue failure monitoring technique is that it is believed that fatigue failure will significantly alter the strain, mass or energy consumption capabilities of the cable structure, thereby causing the dynamic characteristics or response of the measured structure to change, and by extracting effective strain parameters of different parts from the monitoring data, and comparing the corresponding information of the cable under the lossless state to realize the fatigue failure detection and evaluation of the cable, and compared with the traditional sensing technology, the sensing sensitivity of the optical fiber sensing is higher, the fiber-optic cable can normally work in a plurality of special environments such as high voltage, large noise, high temperature, strong corrosiveness and the like, and has a series of advantages of high sensitivity, strong anti-electromagnetic interference capability, corrosion resistance, good electrical insulation, high temperature and high pressure resistance, flame and explosion prevention, convenience for connection with a computer, convenience for forming a remote measurement network with an optical fiber transmission system, light weight, small size, capability of being bent randomly in a certain range and the like.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention without limiting the invention in which:
fig. 1 is a schematic flow structure diagram of a method for monitoring fatigue of a large tower crane cable based on an FBG sensor according to the present invention;
FIG. 2 is a schematic structural diagram of main process steps in a fatigue monitoring method for a large tower crane cable based on an FBG sensor provided by the invention;
FIG. 3 is a schematic diagram of the type and structure of a fiber bragg grating in the fatigue monitoring method for a large tower crane cable based on an FBG sensor according to the invention;
in the figure: 1. an optical signal transmitting terminal; 2. an optical signal transmitting port; 3. an input optical cable; 4. an optical cable input port; 5. an optical cable input module; 6. a branching port; 7. a fiber grating sensor; 8. a branching output port; 9. a first optical cable terminal; 10. an output port of the optical cable terminal; 11. a bus cable; 12. a second input port of the optical cable terminal; 13. a second optical cable terminal; 14. an output port of the optical cable terminal II; 15. connecting an optical cable; 16. an input port of the photoelectric signal conversion module; 17. a photoelectric signal conversion module; 18. an output port of the photoelectric signal conversion module; 19. a cable; 20. an input port of the data acquisition and analysis module; 21. a data acquisition and analysis module; 22. an output port of the data acquisition and analysis module; 23. a digital display connecting line; 24. a digital display module; 25. an input port of the digital display module; 71. a temperature fiber grating sensor; 72. a pressure fiber grating sensor; 73. a strain force temperature fiber grating sensor; 74. displacement temperature fiber grating sensor.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1-3, the invention provides a technical scheme of a fatigue monitoring method for a large tower crane cable based on an FBG sensor, which comprises the following steps:
the utility model provides a fatigue monitoring method of large-scale tower crane cable based on FBG sensor, including light signal transmitting terminal 1 and light signal transmitting port 2, the one end of light signal transmitting terminal 1 is provided with light signal transmitting port 2, the one end of optical cable input module 5 is provided with optical cable input port 4, light signal transmitting terminal 1 and optical cable input module 5 are pegged graft in light signal transmitting port 2 and optical cable input port 4 through input optical cable 3 and are connected, the other end of optical cable input module 5 is provided with branching port 6, the one end of optical cable terminal 9 is provided with branch line output port 8, optical cable input module 5 and branch line port 6 are pegged graft in branching port 6 and branch line output port 8 through fiber grating sensor 7 and are connected.
A fatigue monitoring method for a large tower crane cable based on an FBG sensor comprises the steps that an optical cable terminal I output port 10 is arranged at the other end of an optical cable terminal I9, an optical cable terminal II input port 12 is arranged at one end of an optical cable terminal II 13, the optical cable terminal I9 and the optical cable terminal II 13 are connected in a mode of being plugged in the optical cable terminal I output port 10 and the optical cable terminal II input port 12 through a bus optical cable 11, an optical cable terminal II output port 14 is arranged at the other end of the optical cable terminal II 13, an optical-to-electrical signal conversion module input port 16 is arranged at one end of an optical-to-electrical signal conversion module 17, and the optical cable terminal II 13 and the optical-to-electrical signal conversion module 17 are connected in a mode of being.
A fatigue monitoring method for a large tower crane cable based on an FBG sensor comprises the steps that a photoelectric signal conversion module output port 18 is arranged at the other end of a photoelectric signal conversion module 17, a data acquisition and analysis module input port 20 is arranged at one end of a data acquisition and analysis module 21, the photoelectric signal conversion module 17 and the data acquisition and analysis module 21 are connected through a cable 19 in a mode of being plugged in the photoelectric signal conversion module output port 18 and the data acquisition and analysis module input port 20, a data acquisition and analysis module output port 22 is arranged at the other end of the data acquisition and analysis module 21, a digital display module input port 25 is arranged at one end of the digital display module 24, the data acquisition and analysis module 21 and the digital display module input port 25 are connected through a digital display connecting wire 23 in a mode of being plugged in the digital display module 24 and the data acquisition, The data acquisition and analysis module 21 and the digital display module 24 are electric signal analysis modules, the cable 19 and the digital display connecting wire 23 are live wires, optical signals measured by the fiber grating sensor 7 can be displayed through the digital display module 24, and the optical signals measured by the fiber grating sensor 7 can be digitally displayed to the digital display module 24 after being subjected to system analysis through the data acquisition and analysis module 21.
A fatigue monitoring method for a large tower crane cable based on FBG sensors comprises that a fiber bragg grating sensor 7 must be embedded in a cable, the fiber bragg grating sensor 7 cannot be connected to the outer surface of the cable for monitoring operation, the fiber bragg grating sensor 7 comprises a temperature fiber bragg grating sensor 71, a pressure fiber bragg grating sensor 72, a strain force fiber bragg grating sensor 73 and a displacement fiber bragg grating sensor 74, one end of an optical cable input module 5 is provided with four groups of branch ports 6, the branch ports 6 are sequentially connected with the temperature fiber bragg grating sensor 71, the pressure fiber bragg grating sensor 72, the strain force fiber bragg grating sensor 73 and the displacement fiber bragg grating sensor 74, one end of an optical cable terminal I9 is provided with four groups of branch output ports 8, and the branch output ports 8 are sequentially connected with the temperature fiber bragg grating sensor 71, the strain force fiber bragg grating sensor 73, the displacement fiber, The other ends of the pressure fiber grating sensor 72, the strain force fiber grating sensor 73 and the displacement fiber grating sensor 74 are embedded in the cable, and the temperature fiber grating sensor 71, the pressure fiber grating sensor 72, the strain force fiber grating sensor 73 and the displacement fiber grating sensor 74 are all fixed in the hollow gap of the cable through injection glue.
A fatigue monitoring method for a large tower crane cable based on an FBG sensor comprises an optical signal transmitting end 1, an optical cable input module 5, an optical fiber grating sensor 7, an optical cable terminal I9, an optical cable terminal II 13, a photoelectric signal conversion module 17, a data acquisition and analysis module 21 and a digital display module 24 which are main flow components in the integral monitoring process, wherein the input optical cable 3, a bus optical cable 11 and a connecting optical cable 15 can be bent in a small range, the input optical cable 3, the bus optical cable 11 and the connecting optical cable 15 cannot be bent, the optical cable terminal I9 and the optical cable terminal II 13 are both optical cable terminals, the optical cable terminal I9 is an external optical cable terminal, the optical cable terminal II 13 is an internal optical cable terminal of the environment where the monitoring equipment is located, the numerical values of optical cables at the left end and the right end of the input optical cable 3, the bus optical cable 11, the connecting optical cable 15 and the, The lengths of the bus optical cable 11, the connection optical cable 15 and the optical cables at the left and right ends of the fiber grating sensor 7 can be extended or contracted according to actual needs.
The working principle and the using process of the invention are as follows: after the invention is installed, in the using process, the optical signal is transmitted from the optical signal transmitting end 1 to the optical cable input end 5 through the input optical cable 3, and then the optical cable is transmittedThe input end 5 connects the corresponding optical cable through the branching port 6, the fiber grating sensor 7 composed of the temperature fiber grating sensor 71, the pressure fiber grating sensor 72, the strain force fiber grating sensor 73 and the displacement fiber grating sensor 74, the terminal of the fiber grating sensor 7 is connected through the branching port 8 at the first 9 of the optical cable terminal, after the connection is finished, when the signal fluctuation occurs in the fiber grating sensor 7, the first 9 of the optical cable terminal and the second 13 of the optical cable terminal can transmit the signal to the photoelectric signal conversion module 17 through the corresponding optical cable for photoelectric signal conversion, and then the converted electric signal is correspondingly detected and displayed through the data acquisition and analysis module 21 and the digital display module 24 (during monitoring, through a specific formula (lambda)B＝2neffA) is calculated, (where lambda)BIs the reflected wavelength, neffIs the effective refractive index of the fiber grating, and Λ is the grating period), the period and the effective refractive index of the fiber grating can be changed by stretching and compressing the fiber grating, or the temperature can be changed, so as to achieve the purpose of changing the reflection wavelength of the fiber grating, the central wavelength of the fiber grating has a linear relation with the strain and the temperature, and the fiber grating can be made into various sensors for monitoring, such as strain, temperature, pressure, acceleration and the like, through the related linear relation).
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (8)
1. The utility model provides a fatigue monitoring method of large-scale tower crane cable based on FBG sensor, includes light signal emission end (1) and light signal emission port (2), its characterized in that: an optical signal transmitting port (2) is arranged at one end of the optical signal transmitting end (1), an optical cable input port (4) is arranged at one end of the optical cable input module (5), the optical signal transmitting end (1) and the optical cable input module (5) are connected by being spliced at the optical signal transmitting port (2) and the optical cable input port (4) through an input optical cable (3), a branching port (6) is arranged at the other end of the optical cable input module (5), a branching output port (8) is arranged at one end of the optical cable terminal I (9), the optical cable input module (5) and the branching port (6) are connected by being spliced at the branching port (6) and the branching output port (8) through an optical fiber grating sensor (7), an optical cable terminal I output port (10) is arranged at the other end of the optical cable terminal I (9), and an optical cable terminal II input port (12) is arranged at one end of the optical cable terminal II (13), the optical cable terminal I (9) and the optical cable terminal II (13) are connected with each other by being spliced at an optical cable terminal I output port (10) and an optical cable terminal II input port (12) through a bus optical cable (11), the other end of the optical cable terminal II (13) is provided with an optical cable terminal II output port (14), one end of the photoelectric signal conversion module (17) is provided with a photoelectric signal conversion module input port (16), the optical cable terminal II (13) and the photoelectric signal conversion module (17) are connected with each other by being spliced at the optical cable terminal II output port (14) and the photoelectric signal conversion module input port (16) through a connecting optical cable (15), the other end of the photoelectric signal conversion module (17) is provided with a photoelectric signal conversion module output port (18), one end of the data acquisition and analysis module (21) is provided with a data acquisition and analysis module input port (20), the photoelectric signal conversion module (17) and the data acquisition and analysis module (21) are connected by being spliced with an output port (18) of the photoelectric signal conversion module and an input port (20) of the data acquisition and analysis module through a cable (19), the other end of the data acquisition and analysis module (21) is provided with an output port (22) of the data acquisition and analysis module, one end of the digital display module (24) is provided with an input port (25) of the digital display module, the data acquisition and analysis module (21) and the input port (25) of the digital display module are connected by being spliced with the output port (22) of the digital display module (24) and the data acquisition and analysis module through a digital display connecting wire (23), the fiber grating sensor (7) comprises a temperature fiber grating sensor (71), a pressure fiber grating sensor (72), a strain force fiber grating sensor (73) and a displacement fiber grating sensor (74), the one end of optical cable input module (5) is provided with four group branch line ports (6) altogether, branch line port (6) department has connected gradually temperature fiber grating sensor (71), pressure fiber grating sensor (72), strain force fiber grating sensor (73) and displacement fiber grating sensor (74), the one end of optical cable terminal (9) is provided with four group's separated time output port (8) altogether, separated time output port (8) department has connected gradually the other end of temperature fiber grating sensor (71), pressure fiber grating sensor (72), strain force fiber grating sensor (73) and displacement fiber grating sensor (74) according to established connection order.
2. The fatigue monitoring method for the large tower crane cable based on the FBG sensor as claimed in claim 1, is characterized in that: the optical fiber monitoring system comprises an optical signal transmitting end (1), an optical cable input module (5), an optical fiber grating sensor (7), an optical cable terminal I (9), an optical cable terminal II (13), a photoelectric signal conversion module (17), a data acquisition and analysis module (21) and a digital display module (24), wherein the optical signal transmitting end, the optical cable input module (5), the optical fiber grating sensor, the optical cable terminal I (9), the optical cable terminal II (13), the photoelectric signal conversion.
3. The fatigue monitoring method for the large tower crane cable based on the FBG sensor as claimed in claim 1, is characterized in that: temperature fiber grating sensor (71), pressure fiber grating sensor (72), strain force fiber grating sensor (73) and displacement fiber grating sensor (74) all imbed in the inside of cable, temperature fiber grating sensor (71), pressure fiber grating sensor (72), strain force fiber grating sensor (73) and displacement fiber grating sensor (74) are all fixed in the hollow gap department of cable through injection glue.
4. The fatigue monitoring method for the large tower crane cable based on the FBG sensor as claimed in claim 1, is characterized in that: the fiber grating sensor (7) must be embedded inside the cable, and the fiber grating sensor (7) must not be attached to the outer surface of the cable for monitoring operations.
5. The fatigue monitoring method for the large tower crane cable based on the FBG sensor as claimed in claim 1, is characterized in that: the photoelectric signal conversion module (17), the data acquisition and analysis module (21) and the digital display module (24) are electric signal analysis modules, the cable (19) and the digital display connecting wire (23) are electrified conducting wires, optical signals measured by the fiber grating sensor (7) can be displayed through the digital display module (24), and the optical signals measured by the fiber grating sensor (7)) can be digitally displayed to the digital display module (24) after being subjected to system analysis through the data acquisition and analysis module (21).
6. The fatigue monitoring method for the large tower crane cable based on the FBG sensor as claimed in claim 1, is characterized in that: the input optical cable (3), the bus optical cable (11) and the connecting optical cable (15) can be bent in a small range, and the input optical cable (3), the bus optical cable (11) and the connecting optical cable (15) cannot be bent.
7. The fatigue monitoring method for the large tower crane cable based on the FBG sensor as claimed in claim 1, is characterized in that: the optical cable terminal I (9) and the optical cable terminal II (13) are both optical cable terminals, the optical cable terminal I (9) is an external optical cable terminal, and the optical cable terminal II (13) is a built-in optical cable terminal of the environment where the monitoring equipment is located.
8. The fatigue monitoring method for the large tower crane cable based on the FBG sensor as claimed in claim 1, is characterized in that: the optical cable numerical value of both ends is for the indeterminate value about input optical cable (3), bus optical cable (11), connecting optical cable (15) and fiber grating sensor (7), the optical cable length of both ends can extend or contract according to actual need about input optical cable (3), bus optical cable (11), connecting optical cable (15) and fiber grating sensor (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910868739.7A CN110589686A (en) | 2019-09-16 | 2019-09-16 | Fatigue monitoring method for large tower crane cable based on FBG (fiber Bragg Grating) sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910868739.7A CN110589686A (en) | 2019-09-16 | 2019-09-16 | Fatigue monitoring method for large tower crane cable based on FBG (fiber Bragg Grating) sensor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110589686A true CN110589686A (en) | 2019-12-20 |
Family
ID=68859669
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910868739.7A Pending CN110589686A (en) | 2019-09-16 | 2019-09-16 | Fatigue monitoring method for large tower crane cable based on FBG (fiber Bragg Grating) sensor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110589686A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1400451A (en) * | 2002-08-29 | 2003-03-05 | 武汉理工大学 | Monitoring method of long-period working state of optical fibre grating anchor wire and its equipment |
| CN201567531U (en) * | 2009-09-30 | 2010-09-01 | 法尔胜集团公司 | Smart cable device for bridges with optical fiber grating sensor inside |
| US20120162635A1 (en) * | 2009-08-31 | 2012-06-28 | Kloe S.A. | Fiber optic measuring device and method |
| CN106918296A (en) * | 2017-03-23 | 2017-07-04 | 江苏骏龙光电科技股份有限公司 | A kind of fiber grating measurement apparatus strained for bridge cable with temperature monitoring |
| CN109596251A (en) * | 2019-01-09 | 2019-04-09 | 北京全路通信信号研究设计院集团有限公司 | Fibre Optical Sensor track switch converts power detection method and device |
-
2019
- 2019-09-16 CN CN201910868739.7A patent/CN110589686A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1400451A (en) * | 2002-08-29 | 2003-03-05 | 武汉理工大学 | Monitoring method of long-period working state of optical fibre grating anchor wire and its equipment |
| US20120162635A1 (en) * | 2009-08-31 | 2012-06-28 | Kloe S.A. | Fiber optic measuring device and method |
| CN201567531U (en) * | 2009-09-30 | 2010-09-01 | 法尔胜集团公司 | Smart cable device for bridges with optical fiber grating sensor inside |
| CN106918296A (en) * | 2017-03-23 | 2017-07-04 | 江苏骏龙光电科技股份有限公司 | A kind of fiber grating measurement apparatus strained for bridge cable with temperature monitoring |
| CN109596251A (en) * | 2019-01-09 | 2019-04-09 | 北京全路通信信号研究设计院集团有限公司 | Fibre Optical Sensor track switch converts power detection method and device |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107328503B (en) | coal mine tunnel roof stress on-line monitoring system and method based on fiber bragg grating sensor | |
| CN201392418Y (en) | Combined type sensing optical cable | |
| CN103591971B (en) | A kind of localization method of fiber grating | |
| CN201788759U (en) | Intelligent type overhead transmission conductor and monitoring system thereof | |
| CN103398801B (en) | A kind of optical fiber grating temperature measurement mechanism and measuring method | |
| CN107121158B (en) | A kind of internal enclosed cantilever beam fiber-optic grating sensor | |
| CN101298992A (en) | Distributed type fiber optic sensor based on optical fiber cavity attenuation and vibration technique | |
| CN202720369U (en) | Distributed strain and temperature monitoring optical cable laid along object surface | |
| CN104454007A (en) | Mine safety early warning system based on multi-fiber-core optical fibers | |
| CN202511922U (en) | Oppc optical cable stress and carrying capacity measuring and calculating system | |
| CN201521291U (en) | Underground distributed temperature sensor | |
| CN201569523U (en) | Stress and strain measuring device applied for optical phase conductor OPPC | |
| CN110589686A (en) | Fatigue monitoring method for large tower crane cable based on FBG (fiber Bragg Grating) sensor | |
| CN203822543U (en) | Novel monitoring system of wind generator set | |
| CN204007705U (en) | A kind of fiber grating transformer online monitoring system | |
| CN106289390A (en) | A kind of long length submarine cable production monitoring method | |
| CN201247073Y (en) | Distributed optical fiber sensor based on optical fiber cavity wane sway technology | |
| CN203587125U (en) | Positioning system of fiber grating | |
| CN214409398U (en) | Compound OPGW optical cable integrating sensing function | |
| CN109163882A (en) | A kind of detection system and its detection method of the compound carbon-fibre wire defect of optical fiber | |
| CN202281843U (en) | Distributed sensing demodulation system based on tapered fiber gratings | |
| Jie et al. | A new packaged FBG sensor for underground cable temperature monitoring | |
| CN102044125B (en) | Reflectivity-based encoding type fiber Bragg grating fireproof monitoring system | |
| CN202511897U (en) | Intelligent monitoring system for temperature of crosslinked polyethylene (XLPE) power cables | |
| CN205352467U (en) | Transmission line's icing snow monitoring system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20191220 |