CN208187610U - Primary structure member, fiber-optic grating sensor and smart stay cable - Google Patents
Primary structure member, fiber-optic grating sensor and smart stay cable Download PDFInfo
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- CN208187610U CN208187610U CN201820876009.2U CN201820876009U CN208187610U CN 208187610 U CN208187610 U CN 208187610U CN 201820876009 U CN201820876009 U CN 201820876009U CN 208187610 U CN208187610 U CN 208187610U
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Abstract
The utility model discloses a kind of primary structure member, fiber-optic grating sensor and smart stay cables, including the measuring section for generating consistent deformation with tested component, the groove for accommodating fiber grating is offered on the measuring section, the groove extends along member stress direction is tested, and is additionally provided with the fixed part for fixing fiber grating at the both ends of the measuring section.The utility model on the measuring section of primary structure member by opening up groove; and groove extends along member stress direction is tested; when fiber grating is placed in the groove; the groove can position fiber grating; groove increases the contact area of fiber grating and measuring section simultaneously; and fiber grating both ends tail optical fiber is fixed in the fixed part at conjunction measuring section both ends; form it into an overall structure; the primary structure member is convenient to carry out installation connection to fiber grating; and preferable protection can be formed to fiber grating, avoid fiber grating from damaging.
Description
Technical field
The utility model relates to sensor technical fields, and in particular to a kind of primary structure member, fiber-optic grating sensor and
Smart stay cable.
Background technique
Parallel steel wire and guy of twisted steel cable are widely used in science of bridge building, such as the drag-line, arch bridge and suspension bridge of cable-stayed bridge
Hoist cable, the tie-rod etc. of arch bridge.Due to the static Suo Li of drag-line be drag-line construction with operation detection important parameter, drag-line it is quiet
State stress, dynamic stress and Vibration Condition are the important indicators for detecting drag-line working condition, thus need the above-mentioned ginseng to drag-line
Number is accurately measured.
Fiber grating is a kind of senser element haveing excellent performance, and is able to achieve absolute, dynamic strain and temperature measurement, can
For the measurement to drag-line relevant parameter.But bare optical fibers and bare optical gratings itself are more fragile and connection bothers, according to common
Bonding installation, does not form reliable protection to fiber grating, while binder is there are draw measurement accuracy, further for
For the drag-line of large deformation, measuring range is inadequate.
Utility model content
The utility model aim is: for using fiber grating pair drag-line parameter measure when, due to bare fibre
The problem of grating itself is more fragile, connection bothers, common bonding installation, and reliably protecting is not formed to fiber grating, mentions
For a kind of primary structure member, the primary structure member is convenient to carry out installation connection to fiber grating, and can be formed to fiber grating preferably
Protection, avoid fiber grating from damaging.
To achieve the goals above, the technical solution adopted in the utility model are as follows:
A kind of primary structure member opens up on the measuring section including the measuring section for generating consistent deformation with tested component
Have a groove for accommodating fiber grating, the groove extends along member stress direction is tested, the both ends of the measuring section also
Equipped with the fixed part for fixing fiber grating.
The utility model on the measuring section of primary structure member by opening up groove, and groove prolongs along member stress direction is tested
It stretches, when fiber grating is placed in the groove, which can be positioned fiber grating, while groove increases optical fiber
The contact area of grating and measuring section, and fiber grating both ends tail optical fiber is fixed in the fixed part at conjunction measuring section both ends, makes
It forms an overall structure, and the primary structure member is convenient to carry out installation connection to fiber grating, and can be formed to fiber grating
Preferable protection, avoids fiber grating from damaging.
As a preferred embodiment of the present invention, the measuring section includes the first measuring section and the second measuring section, vertical
In on the section in tested member stress direction, the sectional area of first measuring section is less than the sectional area of second measuring section.
By making measuring section include the first measuring section and the second measuring section, and in cutting perpendicular to tested member stress direction
On face, the sectional area of the first measuring section less than the second measuring section sectional area, when deformation occurs for tested component, the first measuring section
Strain with the second measuring section be it is different, the big strain sensitivity of sectional area is poor, and the small strain sensitivity of sectional area is good；Separately
The big rigidity of one side sectional area and ultimate strength are big, and the small rigidity of sectional area and ultimate strength are small, when fiber grating is arranged in
When on the measuring section of different cross-sectional, sensitivity or measuring range to sensor can be realized and be adjusted, be conducive to expand
The scope of application of sensor.
It should be noted that for the strain transducer that both ends are fixedly mounted, according to the strain calculation formula of primary structure member:Wherein N is axial force, and E is elasticity modulus, and A is each measuring section perpendicular to tested structure
Corresponding sectional area on part Impact direction, since both ends installation axial force N size is the same, material elastic modulus E is the same, and
Total deformation in construction section is the same, but on the measuring section of different cross-sectional, the ratio for deforming distribution is different, so sectional area
Size decide the strain of each measuring section, thus adjust the size of each measuring section sectional area, can adjust the spirit of sensor
Sensitivity or measuring range.The program can either form preferable protection to fiber grating, and fiber grating is avoided to damage, and can be to light
Fine grating sensitivity or range be adjusted, and has abandoned and had changed sensor in the past by adjusting fiber grating and its packaging technology
Sensitivity or measuring range way, and the program is implemented simple, and implementation cost is low.
As a preferred embodiment of the present invention, there are first measuring section, and the first measurement section on the measuring section
Between two the second measuring sections.By being arranged first measuring section on measuring section, and the first measuring section is located at two the
Between two measuring sections, since the sectional area of the first measuring section is less than the sectional area of the second measuring section, i.e. the primary structure member is in both ends
Big intermediate small structure, is fixed when by primary structure member both ends, when fiber grating is arranged on the first measuring section, due to symmetrical configuration
Property so that sensor manufacture and it is easy for installation, the first measuring section stress and deformation is more uniform, can preferably increase sensor
Detection sensitivity.
As a preferred embodiment of the present invention, there are second measuring section, and the second measurement section on the measuring section
Between two the first measuring sections.By being arranged second measuring section on measuring section, and the second measuring section is located at two the
Between one measuring section, since the sectional area of the first measuring section is less than the sectional area of the second measuring section, i.e. the primary structure member is in both ends
Small structure broad in the middle, is fixed when by primary structure member both ends, when fiber grating is arranged on the second measuring section, due to symmetrical configuration
Property so that sensor manufacture and it is easy for installation, the second measuring section stress and deformation is more uniform, can preferably increase sensor
Measuring range.
As a preferred embodiment of the present invention, first measuring section and the second measuring section are uniaxial force component.When
When the position of external force suffered by component is overlapped with the centroid of member section, then the stress that member cross-sections generate is to be uniformly distributed,
Deformation is uniform when can make each measuring section stress.
As a preferred embodiment of the present invention, the center line of first measuring section and the second measuring section is located at always
On line, deformation is more uniform when can make each measuring section stress.
As a preferred embodiment of the present invention, the measuring section is long strip shape structure.When using plate structure, cut
Face regular shape, and the stress distribution on section is uniform, while by reducing plate thickness size, reducing primary structure member and tested structure
Occupied space after part connection, and facilitate manufacture.
As a preferred embodiment of the present invention, the groove is obliquely installed relative to measuring section Impact direction, Ke Yikuo
The measuring range of big fiber grating.
As a preferred embodiment of the present invention, the fixed part includes the supporting plate being connected with measuring section both ends, the branch
Plate is arranged at channel outlet, and the two sides of the supporting plate are additionally provided with the lug that can be turned down to supporting plate.By setting supporting plate and
The lug that the two sides setting of supporting plate can be turned down to supporting plate, presses the tail optical fiber at fiber grating both ends by turning down the lug
Fixation is connect, so that fiber grating and primary structure member be made to be linked as entirety, is convenient for connecting primary structure member and tested component when subsequent use
It connects, prevents the fiber grating that fractures in installation process.
The utility model also provides a kind of fiber-optic grating sensor, including above-described primary structure member, on measuring section
Groove in be equipped with fiber grating, and fiber grating both ends are connect with fixed part.By the way that fiber grating is arranged in primary structure member
Measuring section on groove in, and fiber grating both ends are fixed using fixed part, so that fiber grating and primary structure member be made to connect
For fiber-optic grating sensor is integrally formed, it is convenient for connecting sensor with tested component when subsequent use, prevents in installation process
Fracture fiber grating.
As a preferred embodiment of the present invention, the fiber grating is located at measuring section middle position.By by optical fiber light
Grid are arranged in measuring section middle position, deform system that is more uniform, but also can saving the sensor after can not only having made fiber grating stress
Cause this.
As a preferred embodiment of the present invention, fiber grating both ends tail optical fiber is equipped with armouring or skin cable sheath, both may be used
Fiber grating both ends tail optical fiber is protected, avoids the fixed part at measuring section both ends from damaging when tail optical fiber is fixed, again
It is easy to implement quick cold joint.
The utility model also provides a kind of smart stay cable, including above-described primary structure member or fiber-optic grating sensor,
The primary structure member both ends are connect with drag-line fixation with steel wire.By the way that primary structure member is arranged on drag-line, it is arranged on primary structure member quick
Sensing unit, or fiber-optic grating sensor is set on drag-line, it, can shape after primary structure member both ends are connect with drag-line fixation with steel wire
At smart stay cable, the monitoring to drag-line data is realized, the smart stay cable is easy for installation quick when using, and simplifies site operation work
Skill.
As a preferred embodiment of the present invention, the groove on the primary structure member is arranged towards drag-line steel wire.By stress
Groove on component is towards drag-line steel wire, i.e., after primary structure member is connect with drag-line steel wire, fiber grating be located at drag-line steel wire with
Between primary structure member, to form protecting effect to fiber grating.
In conclusion by adopting the above-described technical solution, the beneficial effects of the utility model are:
1, the utility model on the measuring section of primary structure member by opening up groove, and groove is along tested member stress direction
Extend, when fiber grating is placed in the groove, which can be positioned fiber grating, while groove increases light
The contact area of fine grating and measuring section, and fiber grating both ends tail optical fiber is fixed in the fixed part at conjunction measuring section both ends,
An overall structure is formed it into, the primary structure member is convenient to carry out installation connection to fiber grating, and can be to fiber grating shape
At preferable protection, fiber grating is avoided to damage；
2, by making measuring section include the first measuring section and the second measuring section, and perpendicular to tested member stress direction
On section, the sectional area of the first measuring section is less than the sectional area of the second measuring section, and when deformation occurs for tested component, first is measured
Section and the second measuring section strain be it is different, the big strain sensitivity of sectional area is poor, and the small strain sensitivity of sectional area is good；
The big rigidity of another aspect sectional area and ultimate strength are big, and the small rigidity of sectional area and ultimate strength are small, when fiber grating is arranged
When on the measuring section of different cross-sectional, sensitivity or measuring range to sensor can be realized and be adjusted, be conducive to expand
The scope of application of large sensor；
3, by the way that fiber grating to be arranged in the groove on the measuring section of primary structure member, and use fixed part by optical fiber light
Grid both ends are fixed, to make fiber grating and primary structure member be linked as that fiber-optic grating sensor is integrally formed, when being convenient for subsequent use
Sensor is connect with tested component, prevents the fiber grating that fractures in installation process；
4, by the way that primary structure member is arranged on drag-line, sensing element is set, or optical fiber is arranged on drag-line on primary structure member
Grating sensor after connecting at primary structure member both ends with drag-line fixation with steel wire, can form smart stay cable, realize to drag-line data
Monitoring, the smart stay cable use when it is easy for installation quickly, simplify site construction technology.
Detailed description of the invention
Fig. 1 is the first primary structure member schematic diagram in the utility model.
Fig. 2 is second of primary structure member schematic diagram in the utility model.
Fig. 3 is the third primary structure member schematic diagram in the utility model.
Fig. 4 is the 4th kind of primary structure member schematic diagram in the utility model.
Fig. 5 is the first fiber-optic grating sensor schematic diagram in the utility model.
Fig. 6 is second of fiber-optic grating sensor schematic diagram in the utility model.
Fig. 7 is the third fiber-optic grating sensor schematic diagram in the utility model.
Fig. 8 is the 4th kind of fiber-optic grating sensor schematic diagram in the utility model.
Fig. 9 is the first smart stay cable schematic diagram in the utility model.
Figure 10 is second of smart stay cable schematic diagram in the utility model.
Marked in the figure: 1- measuring section, the first measuring section of 11-, the second measuring section of 12-, 13- groove, 2- supporting plate, 21- lug,
3- fiber grating, 4- tail optical fiber, 5- nut, 6- extending, 7- steel tendon, 8- epoxy iron sand.
Specific embodiment
With reference to the accompanying drawing, the utility model is described in detail.
In order to make the purpose of the utility model, technical solutions and advantages more clearly understood, below in conjunction with attached drawing and implementation
Example, the present invention will be further described in detail.It should be appreciated that specific embodiment described herein is only to explain this
Utility model is not used to limit the utility model.
Embodiment 1
The present embodiment provides a kind of primary structure members；
As shown in Figure 1, the primary structure member in the present embodiment, including the measuring section for generating consistent deformation with tested component
1, the groove 13 for accommodating fiber grating is offered on the measuring section 1, the groove 13 prolongs along tested member stress direction
It stretches, further respectively has the fixed part for fixing fiber grating at the both ends of the measuring section 1.
The utility model on the measuring section of primary structure member by opening up groove, and groove prolongs along member stress direction is tested
It stretches, when fiber grating is placed in the groove, which can be positioned fiber grating, while groove increases optical fiber
The contact area of grating and measuring section, and fiber grating both ends tail optical fiber is fixed in the fixed part at conjunction measuring section both ends, makes
It forms an overall structure, and the primary structure member is convenient to carry out installation connection to fiber grating, and can be formed to fiber grating
Preferable protection, avoids fiber grating from damaging.
In the present embodiment, the measuring section is uniaxial force component.The position and member section of the external force suffered by the component
Centroid when being overlapped, then the stress that member cross-sections generate is to be uniformly distributed, and deformation is uniform when can make each measuring section stress.
In the present embodiment, the measuring section is long strip shape structure.When using plate structure, cross sectional shape rule, and
Stress distribution on section is uniform, while by reducing plate thickness size, reducing shared after primary structure member is connect with tested component
Space, and facilitate manufacture.
As shown in Fig. 2, the groove can also be obliquely installed relative to measuring section Impact direction, fiber grating can be expanded
Measuring range.
In the present embodiment, the fixed part includes the supporting plate 2 being connected with 1 both ends of measuring section, and the supporting plate 2 is arranged in groove
13 exits, the two sides of the supporting plate 2 are additionally provided with the lug 21 that can be turned down to supporting plate 2.By setting supporting plate and in supporting plate
The lug that two sides setting can be turned down to supporting plate is convenient for carrying out crimping admittedly to the tail optical fiber at fiber grating both ends by turning down the lug
It is fixed, so that fiber grating and primary structure member be made to be linked as entirety, it is convenient for connecting primary structure member with tested component when subsequent use, prevents
Only fracture in installation process fiber grating.
Embodiment 2
The present embodiment provides a kind of primary structure members；
As shown in figure 3, the primary structure member in the present embodiment, including the measuring section for generating consistent deformation with tested component
1, the groove 13 for accommodating fiber grating is offered on the measuring section 1, the groove extends along member stress direction is tested,
The fixed part for fixing fiber grating is further respectively had at the both ends of the measuring section.
The utility model on the measuring section of primary structure member by opening up groove, and groove prolongs along member stress direction is tested
It stretches, when fiber grating is placed in the groove, which can be positioned fiber grating, while groove increases optical fiber
The contact area of grating and measuring section, and fiber grating both ends tail optical fiber is fixed in the fixed part at conjunction measuring section both ends, makes
It forms an overall structure, and the primary structure member is convenient to carry out installation connection to fiber grating, and can be formed to fiber grating
Preferable protection, avoids fiber grating from damaging.
In the present embodiment, the measuring section 1 includes the first measuring section 11 and the second measuring section 12, perpendicular to tested component
On the section of Impact direction, the sectional area of first measuring section 11 is less than the sectional area of second measuring section 12.
By making measuring section include the first measuring section and the second measuring section, and in cutting perpendicular to tested member stress direction
On face, the sectional area of the first measuring section less than the second measuring section sectional area, when deformation occurs for tested component, the first measuring section
Strain with the second measuring section be it is different, the big strain sensitivity of sectional area is poor, and the small strain sensitivity of sectional area is good；Separately
The big rigidity of one side sectional area and ultimate strength are big, and the small rigidity of sectional area and ultimate strength are small, when fiber grating is arranged in
When on the measuring section of different cross-sectional, sensitivity or measuring range to sensor can be realized and be adjusted, be conducive to expand
The scope of application of sensor.
It should be noted that for the strain transducer that both ends are fixedly mounted, according to the strain calculation formula of primary structure member:Wherein N is axial force, and E is elasticity modulus, and A is each measuring section perpendicular to tested structure
Corresponding sectional area on part Impact direction, since both ends installation axial force N size is the same, material elastic modulus E is the same, and
Total deformation in construction section is the same, but on the measuring section of different cross-sectional, the ratio for deforming distribution is different, so sectional area
Size decide the strain of each measuring section, thus adjust the size of each measuring section sectional area, can adjust the spirit of sensor
Sensitivity or measuring range.The program can either form preferable protection to fiber grating, and fiber grating is avoided to damage, and can be to light
Fine grating sensitivity or range be adjusted, and has abandoned and had changed sensor in the past by adjusting fiber grating and its packaging technology
Sensitivity or measuring range way, and the program is implemented simple, and implementation cost is low.
In the present embodiment, there is first measuring section 11 on the measuring section 1, and the first measuring section 11 is located at two second
Between measuring section 12.By the way that first measuring section is arranged on measuring section, and the first measuring section is located at two the second measuring sections
Between, since the sectional area of the first measuring section is less than the sectional area of the second measuring section, i.e. the primary structure member is in big at both ends and small in middle
Structure, fixed when by primary structure member both ends, when fiber grating is arranged on the first measuring section, due to structural symmetry so that
Sensor manufacture and it is easy for installation, the first measuring section stress and deformation is more uniform, can preferably increase sensor detection spirit
Sensitivity.
In the present embodiment, first measuring section and the second measuring section are uniaxial force component.The external force suffered by the component
When position is overlapped with the centroid of member section, then the stress that member cross-sections generate is to be uniformly distributed, and can make each measurement
Deformation is uniform when Duan Shouli.
In the present embodiment, the center line of first measuring section and the second measuring section is located along the same line, and can make each
Deformation is more uniform when measuring section stress.
In the present embodiment, the measuring section is long strip shape structure.When using plate structure, cross sectional shape rule, and
Stress distribution on section is uniform, while by reducing plate thickness size, reducing shared after primary structure member is connect with tested component
Space, and facilitate manufacture.
In the present embodiment, the groove is obliquely installed relative to measuring section Impact direction, can expand the survey of fiber grating
Measure range.
In the present embodiment, the fixed part includes the supporting plate 2 being connected with measuring section both ends, and the supporting plate setting goes out in groove
At mouthful, the two sides of the supporting plate 2 are additionally provided with the lug 21 that can be turned down to supporting plate.It is set by setting supporting plate and in the two sides of supporting plate
The lug that can be turned down to supporting plate is set, crimping fixation is carried out to the tail optical fiber at fiber grating both ends by turning down the lug, thus
So that fiber grating and primary structure member is linked as entirety, is convenient for connecting primary structure member with tested component when subsequent use, prevents from installing
Fracture fiber grating in the process.
Embodiment 3
The present embodiment provides a kind of primary structure members；
As shown in figure 4, the primary structure member in the present embodiment, including the measuring section for generating consistent deformation with tested component
1, the groove 13 for accommodating fiber grating is offered on the measuring section 1, the groove extends along member stress direction is tested,
The fixed part for fixing fiber grating is further respectively had at the both ends of the measuring section.
The utility model on the measuring section of primary structure member by opening up groove, and groove prolongs along member stress direction is tested
It stretches, when fiber grating is placed in the groove, which can be positioned fiber grating, while groove increases optical fiber
The contact area of grating and measuring section, and fiber grating both ends tail optical fiber is fixed in the fixed part at conjunction measuring section both ends, makes
It forms an overall structure, and the primary structure member is convenient to carry out installation connection to fiber grating, and can be formed to fiber grating
Preferable protection, avoids fiber grating from damaging.
In the present embodiment, the measuring section 1 includes the first measuring section 11 and the second measuring section 12, perpendicular to tested component
On the section of Impact direction, the sectional area of first measuring section 11 is less than the sectional area of second measuring section 12.
By making measuring section include the first measuring section and the second measuring section, and in cutting perpendicular to tested member stress direction
On face, the sectional area of the first measuring section less than the second measuring section sectional area, when deformation occurs for tested component, the first measuring section
Strain with the second measuring section be it is different, the big strain sensitivity of sectional area is poor, and the small strain sensitivity of sectional area is good；Separately
The big rigidity of one side sectional area and ultimate strength are big, and the small rigidity of sectional area and ultimate strength are small, when fiber grating is arranged in
When on the measuring section of different cross-sectional, sensitivity or measuring range to sensor can be realized and be adjusted, be conducive to expand
The scope of application of sensor.
It should be noted that for the strain transducer that both ends are fixedly mounted, according to the strain calculation formula of primary structure member:Wherein N is axial force, and E is elasticity modulus, and A is each measuring section perpendicular to tested structure
Corresponding sectional area on part Impact direction, since both ends installation axial force N size is the same, material elastic modulus E is the same, and
Total deformation in construction section is the same, but on the measuring section of different cross-sectional, the ratio for deforming distribution is different, so sectional area
Size decide the strain of each measuring section, thus adjust the size of each measuring section sectional area, can adjust the spirit of sensor
Sensitivity or measuring range.The program can either form preferable protection to fiber grating, and fiber grating is avoided to damage, and can be to light
Fine grating sensitivity or range be adjusted, and has abandoned and had changed sensor in the past by adjusting fiber grating and its packaging technology
Sensitivity or measuring range way, and the program is implemented simple, and implementation cost is low.
In the present embodiment, there is second measuring section 12 on the measuring section 1, and the second measuring section 12 is located at two first
Between measuring section 11.By the way that second measuring section is arranged on measuring section, and the second measuring section is located at two the first measuring sections
Between, since the sectional area of the first measuring section is less than the sectional area of the second measuring section, i.e., the primary structure member is in small in ends broad in the middle
Structure, fixed when by primary structure member both ends, when fiber grating is arranged on the second measuring section, due to structural symmetry so that
Sensor manufacture and it is easy for installation, the second measuring section stress and deformation is more uniform, can preferably increase the measurement amount of sensor
Journey.
In the present embodiment, first measuring section and the second measuring section are uniaxial force component.The external force suffered by the component
When position is overlapped with the centroid of member section, then the stress that member cross-sections generate is to be uniformly distributed, and can make each measurement
Deformation is uniform when Duan Shouli.
In the present embodiment, the center line of first measuring section and the second measuring section is located along the same line, and can make each
Deformation is more uniform when measuring section stress.
In the present embodiment, the measuring section is long strip shape structure.When using plate structure, cross sectional shape rule, and
Stress distribution on section is uniform, while by reducing plate thickness size, reducing shared after primary structure member is connect with tested component
Space, and facilitate manufacture.
In the present embodiment, the groove is obliquely installed relative to measuring section Impact direction, can expand the survey of fiber grating
Measure range.
In the present embodiment, the fixed part includes the supporting plate 2 being connected with 1 both ends of measuring section, and the supporting plate is arranged in groove
Exit, the two sides of the supporting plate 2 are additionally provided with the lug 21 that can be turned down to supporting plate.By setting supporting plate and in the two sides of supporting plate
The lug that can be turned down to supporting plate is set, crimping fixation is carried out to the tail optical fiber at fiber grating both ends by turning down the lug, from
And fiber grating and primary structure member is made to be linked as entirety, it is convenient for connecting primary structure member with tested component when subsequent use, prevents from pacifying
Fracture fiber grating during dress.
Embodiment 4
The present embodiment provides a kind of fiber-optic grating sensors；
As shown in Figure 5 and Figure 6, the fiber-optic grating sensor in the present embodiment, including above-described primary structure member, are being surveyed
It measures and is equipped with fiber grating 3 in the groove 13 in section 1, and fiber grating both ends are connect with fixed part.By the way that fiber grating is arranged
Fiber grating both ends are fixed in the groove on the measuring section of primary structure member, and using fixed part, thus make fiber grating and
Primary structure member is linked as that fiber-optic grating sensor is integrally formed, and is convenient for connecting sensor with tested component when subsequent use, prevent
Fracture fiber grating in installation process.
In the present embodiment, the fiber grating 3 is located at 1 middle position of measuring section.By the way that fiber grating is arranged in measurement
Section middle position, deformed manufacturing cost that is more uniform, but also can saving the sensor after can not only having made fiber grating stress.
As shown in fig. 7, having first measuring section 11 on the measuring section 1, and the first measuring section 11 is located at two second
Between measuring section 12.By the way that first measuring section is arranged on measuring section, and the first measuring section is located at two the second measuring sections
Between, since the sectional area of the first measuring section is less than the sectional area of the second measuring section, i.e. the primary structure member is in big at both ends and small in middle
Structure, fixed when by primary structure member both ends, when fiber grating is arranged on the first measuring section, due to structural symmetry so that
Sensor manufacture and it is easy for installation, the first measuring section stress and deformation is more uniform, while the measurement that can increase sensor is sensitive
Degree.
As shown in figure 8, having second measuring section 12 on the measuring section 1, and the second measuring section 12 is located at two first
Between measuring section 11.By the way that second measuring section is arranged on measuring section, and the second measuring section is located at two the first measuring sections
Between, since the sectional area of the first measuring section is less than the sectional area of the second measuring section, i.e., the primary structure member is in small in ends broad in the middle
Structure, fixed when by primary structure member both ends, when fiber grating is arranged on the second measuring section, due to structural symmetry so that
Sensor manufacture and it is easy for installation, the second measuring section stress and deformation is more uniform, while can increase the measuring range of sensor.
In the present embodiment, the tail optical fiber 4 at 3 both ends of fiber grating is equipped with armouring or skin cable sheath, both can be to fiber grating
Both ends tail optical fiber is protected, and the fixed part at measuring section both ends is avoided to damage when tail optical fiber is fixed, and is easy to implement fast
Quickly cooling connects.
Embodiment 5
The present embodiment provides a kind of smart stay cables；
As shown in figure 9, the smart stay cable in the present embodiment, including above-described primary structure member or optical fiber grating sensing
Device, the primary structure member both ends are connect with drag-line fixation with steel wire.By the way that primary structure member is arranged on drag-line, it is arranged on primary structure member
Sensing element, or fiber-optic grating sensor is set on drag-line, after primary structure member both ends are connect with drag-line fixation with steel wire
Smart stay cable is formed, realizes the monitoring to drag-line data, the smart stay cable is easy for installation quick when using, and simplifies site operation work
Skill；Simultaneously because primary structure member has different cross-sectional composite structure, when fiber grating is arranged on different primary structure members, i.e.,
Different effects can be played, such as increases the measuring range of fiber-optic grating sensor, to meet the large-deformation measuring demand of drag-line；
Certainly it can also increase the measurement sensitivity of fiber-optic grating sensor, to improve smart stay cable measurement sensitivity.
In the present embodiment, the groove on the primary structure member is arranged towards drag-line steel wire.By the groove court on primary structure member
To drag-line steel wire, i.e., after primary structure member is connect with drag-line steel wire, fiber grating between drag-line steel wire and primary structure member, from
And protecting effect is formed to fiber grating.
In the present embodiment, the primary structure member is connect with steel tendon 7, is had nut 5 on drag-line, is equipped with epoxy iron inside anchorage
The tail optical fiber of sand 8, the fiber grating both ends is drawn from the tail end bottom of drag-line；In addition, the tail optical fiber 4 at the fiber grating both ends
It can be drawn from 6 end of extending of drag-line, as shown in Figure 10.
Smart stay cable in the present embodiment can follow the steps below production:
A, fiber grating is made；
B, primary structure member is made；
C, the fiber grating in step a is placed in the groove in step b on primary structure member, and by fiber grating both ends
Tail optical fiber is fixed by the fixed part on primary structure member；
D, the primary structure member in step c is connected with drag-line steel wire.
By making fiber grating, primary structure member, and fiber grating is placed in the groove on primary structure member, while will be by
Power component is connected with drag-line steel wire, can form smart stay cable, and the smart stay cable manufacturing process steps are simple, is easy to implement.
In the present embodiment, step a, can be using the easily cold connection of skin cable optical fiber fabrication non junction when making fiber grating
Fiber grating；Or it uses and is lithographically formed fiber grating among bare fibre.
In the present embodiment, step b makes primary structure member using an elongated little Bao stainless steel substrates or steel disc, and both ends contain
There are supporting plate and lug, and longitudinally opens straight flute or valley gutter in primary structure member.
In the present embodiment, fiber grating is placed in the groove of elongated thin stainless steel substrates or steel disc by step c, fiber grating
Armouring or skin cable sheath is arranged in both ends tail optical fiber, by stainless steel substrates or steel disc lug bending direction, crimps tail optical fiber, forms entirety, and
Make lug warpage backward, damages tail optical fiber when to weld by pressure.
In the present embodiment, need to use steel wire to be wrapped cable body processed in step d in advance, i.e., on special equipment, by steel wire twisting
It is wrapped and makes cable body；Then PE is shelled at steel wire both ends, chooses several steel wires, elongated steel disc or stainless steel substrates two-end-point is welded in steel
On silk, and make fiber grating between steel wire and steel disc；Anchorage and by optical signal lead is finally installed, by the transmission of sensor
Signal wire is drawn outside cable body, can be drawn from from the extraction of the tail end of drag-line or from extending end.
In the present embodiment, the drag-line to complete is demarcated.During drag-line ultra stretching, using standard transducer
Fiber-optic grating sensor is demarcated.By being demarcated to the smart stay cable to complete, establish sensor output with it is defeated
The error condition under relationship and determining different use conditions between entering, so that smart stay cable is easy to use, measurement is accurate.
The above is only the preferred embodiment of the utility model only, is not intended to limit the utility model, all at this
Made any modifications, equivalent replacements, and improvements etc. within the principle of utility model, should be included in the protection of the utility model
Within the scope of.
Claims (14)
1. a kind of primary structure member, including the measuring section for generating consistent deformation with tested component, which is characterized in that the measurement
The groove for accommodating fiber grating is offered in section, the groove extends along member stress direction is tested, in the measuring section
Both ends be additionally provided with the fixed part for fixing fiber grating.
2. primary structure member according to claim 1, which is characterized in that the measuring section includes that the first measuring section and second are surveyed
Section is measured, on the section perpendicular to tested member stress direction, the sectional area of first measuring section is less than second measurement
The sectional area of section.
3. primary structure member according to claim 2, which is characterized in that there is first measuring section on the measuring section, and
First measuring section is located between two the second measuring sections.
4. primary structure member according to claim 2, which is characterized in that there is second measuring section on the measuring section, and
Second measuring section is located between two the first measuring sections.
5. the primary structure member according to one of claim 2-4, which is characterized in that first measuring section and the second measuring section
For uniaxial force component.
6. primary structure member according to claim 5, which is characterized in that the center of first measuring section and the second measuring section
Line is located along the same line.
7. primary structure member according to claim 1, which is characterized in that the measuring section is long strip shape structure.
8. primary structure member according to claim 1, which is characterized in that the groove is tilted relative to measuring section Impact direction
Setting.
9. primary structure member according to claim 1, which is characterized in that the fixed part includes being connected with measuring section both ends
Supporting plate, the supporting plate are arranged at channel outlet, and the two sides of the supporting plate are additionally provided with the lug that can be turned down to supporting plate.
10. a kind of fiber-optic grating sensor, which is characterized in that including the described in any item primary structure members of claim 1-9, surveying
It measures and is equipped with fiber grating in the groove in section, and fiber grating both ends are connect with fixed part.
11. fiber-optic grating sensor according to claim 10, which is characterized in that the fiber grating is located in measuring section
Between position.
12. fiber-optic grating sensor according to claim 10, which is characterized in that fiber grating both ends tail optical fiber is equipped with
Armouring or skin cable sheath.
13. a kind of smart stay cable, which is characterized in that any including the described in any item primary structure members of claim 1-9 or 10-12
Fiber-optic grating sensor described in, the primary structure member both ends are connect with drag-line fixation with steel wire.
14. smart stay cable according to claim 13, which is characterized in that groove on the primary structure member is towards drag-line steel
Silk setting.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820876009.2U CN208187610U (en) | 2018-06-07 | 2018-06-07 | Primary structure member, fiber-optic grating sensor and smart stay cable |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820876009.2U CN208187610U (en) | 2018-06-07 | 2018-06-07 | Primary structure member, fiber-optic grating sensor and smart stay cable |
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| Publication Number | Publication Date |
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| CN208187610U true CN208187610U (en) | 2018-12-04 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108507714A (en) * | 2018-06-07 | 2018-09-07 | 广西大学 | Primary structure member, fiber-optic grating sensor and smart stay cable and production method |
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2018
- 2018-06-07 CN CN201820876009.2U patent/CN208187610U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108507714A (en) * | 2018-06-07 | 2018-09-07 | 广西大学 | Primary structure member, fiber-optic grating sensor and smart stay cable and production method |
| CN108507714B (en) * | 2018-06-07 | 2024-02-27 | 广西大学 | Stress component, fiber bragg grating sensor, intelligent inhaul cable and manufacturing method |
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