CN206709997U - A kind of intelligent bolt for monitoring complicated loads - Google Patents
A kind of intelligent bolt for monitoring complicated loads Download PDFInfo
- Publication number
- CN206709997U CN206709997U CN201720595872.6U CN201720595872U CN206709997U CN 206709997 U CN206709997 U CN 206709997U CN 201720595872 U CN201720595872 U CN 201720595872U CN 206709997 U CN206709997 U CN 206709997U
- Authority
- CN
- China
- Prior art keywords
- bolt
- hole
- shaft section
- strain
- section
- 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.)
- Expired - Fee Related
Links
Landscapes
- Length Measuring Devices By Optical Means (AREA)
- Force Measurement Appropriate To Specific Purposes (AREA)
Abstract
A kind of intelligent bolt for monitoring complicated loads, belongs to technical field of optical fiber sensing.Intelligent bolt includes shank of bolt axle, through hole and optical fiber, and the position that the shaft section center and shaft section center of shank of bolt axle and shaft section are radially mutually hexagonal angle is provided with through hole, totally 4 through holes, a diameter of 1.5mm of through hole；It is mutually that the distance at 120 ° of 3 through hole to shaft section centers is equal, and is all the half of shank of bolt shaft section radius, pastes fixed optical fiber in through hole length range.Optical fiber is installed in bolt axle center and 3 through holes that radial direction angle is 120 °, bar axle maximum strain section is determined by the Strain Distribution of measurement, the maximum strain in section is obtained based on axle center strain on the section and the radially strain of 3 points, then judges the safe condition in section.Effect and benefit of the present utility model are that by the real-time monitoring under bolt complex stress situation, have the advantages of measurement accuracy is high, and long-time stability are good, structure letter.
Description
Technical field
The utility model belongs to technical field of optical fiber sensing, is related to a kind of intelligent bolt for monitoring complicated loads.
Background technology
With popularization and application of the high strength steel in building and science of bridge building, continuous damage has become influence steel construction
The principal element of safety.Stability as various engineering structures and the bolt of plant equipment key member junction is also got over
Hair is taken seriously.In Practical Project, the destruction of bolt is generally because tension caused by shank of bolt shaft section edge exceedes pole
Caused by limit stress.This is due to that moment of flexure, shearing and axle power on component is delivered on bolt, produces bolt larger curved
Song deformation, finally makes bolt exceed the bearing capacity of its own and fail.Therefore monitoring bolt answering under complex stress condition
Power state, it is significant for the safety of steel construction.But the particularity of the particularity or position due to some components, it is difficult to
Security performance of the monitoring bolt certainly under complex stress working condition.At present, monitoring and measurement of the China on bolt stress
Research primarily directed to axial stress in bolt, rarely have for the monitoring under bolt complex stress condition and be related to.It is existing on
The patent CN104964713A of bolt strained monitoring can measure the tension and compression strain in bolt axle center, but this measuring method is only fitted
Situation about being acted on for bolt by xial feed.In the case where moment of flexure is used, bolt axle center is the minimum position of bolt section stress,
Bolt axle heart install sensor can not measure stress in this case, strain.Therefore research one kind in need can be realized multiple
The method of bolt stress monitoring under miscellaneous load action.
Fibre Optical Sensor has high sensitivity, electromagnetism interference, corrosion-resistant, and long-term working stability is good, long transmission distance etc.
Plurality of advantages.It is applied successfully in recent years in the field safety monitoring such as building, bridge.In order to realize bolt shear stress
Monitoring, the utility model are based on a kind of distributed strain e measurement technology, and its general principle is：The spectral response of back rayleigh scattering
Change is main strained and the influence of temperature, in optical fiber the change of arbitrary region Rayleigh scattering can cause corresponding to the region backwards
The change of scattering spectrum, these changes can be calibrated, and are translated into temperature and become and strain.Every section of region in optical fiber can be seen
Make a sensor, whole piece optical fiber can be used as the continuous combination of sensor one by one.The distributed optical fiber sensing system is used
Tunable wavelength interference technique so that distributed temperature and strain measurement can tens length standard fibers on have millimeter
The measuring accuracy of the spatial resolution of rank, strain and temperature can reach 1 microstrain and 0.1 DEG C.
Utility model content
The purpose of this utility model is to provide a kind of intelligent bolt for monitoring complicated loads.
The technical solution of the utility model：
A kind of intelligent bolt for monitoring complicated loads, including shank of bolt axle, through hole and optical fiber, the axle of shank of bolt axle are cut
The position that face center and shaft section center are radially mutually hexagonal angle with shaft section is provided with through hole, totally 4 through holes, the diameter of through hole
For 1.5mm；It is mutually that the distance at 120 ° of 3 through hole to shaft section centers is equal, and is all two points of shank of bolt shaft section radius
One of, paste fixed optical fiber in through hole length range.
A kind of method for monitoring intelligent bolt complicated loads, comprises the following steps：
(1) distributive fiber optic strain measuring system is based on, is measured at shank of bolt shaft section center and mutual with cross-section radial
Along the Strain Distribution of shank of bolt axle total length at into 3 lead to the hole site of hexagonal angle；
(2) by the Strain Distribution of shank of bolt axle axial direction, the maximum section of shank of bolt axle axial strain is determined；
(3) for the maximum section of axial strain,
The respectively section maximum compressive strain and stretching strain；
Wherein, ε0、ε1、ε2、ε33 through holes of hexagonal angle are mutually respectively at shank of bolt shaft section center, with cross-section radial
The strain value that opening position through hole inner fiber measures；
(4) judge whether the stress of most dangerouse cross-section, strain exceed the limit of material by maximum stretching strain, compressive strain
Intensity.
The beneficial effects of the utility model：The intelligent bolt can realize that bolt is certainly real-time under complex stress situation
Monitoring, there is the advantages of measurement accuracy is high, and long-time stability are good, structure letter.
Brief description of the drawings
Fig. 1 is the optical fiber location drawing on shank of bolt shaft section.
In figure：1 shank of bolt axle；2 through holes；3 optical fiber.
Embodiment
Specific embodiment of the present utility model is described in detail below in conjunction with technical scheme and Figure of description：
A kind of intelligent bolt for monitoring complicated loads, as shown in Figure 1,1 is made a call in the axis of shank of bolt axle 1 and is led to
Hole；3 through holes are made a call in 1/2 opening position of section radius, the angle of two neighboring through hole and circle center line connecting is 120 °.To avoid leading to
The excessive bearing capacity for having influence on bolt in aperture, through-hole aperture 1.5mm.
Optical fiber is punctured into through hole, in the state of pre-stretching, optical fiber is pasted onto in the through hole with adhesive
Heart position, and ensure that optical fiber is pasted along shank of bolt axle total length.Described adhesive is epoxy resin or esters of acrylic acid glue.
The shaft section center of shank of bolt axle and shaft section center are radially mutually to three positions of hexagonal angle with shaft section
It is 0#, 1#, 2#, 3# that optical fiber is numbered respectively.0#, 1#, 2#, 3# fiber position are measured by distributive fiber optic strain measuring system
Strain Distribution of the place along shank of bolt axle axial direction, the Strain Distribution based on shank of bolt axial direction determine that shank of bolt axial strain is maximum and cut
Face.
The maximum section of strain is analyzed, the maximum compressive strain and maximum stretching strain for obtaining the section are respectively equal toWherein ε0、ε1、
ε2、ε3The respectively strain of 0#, 1#, 2#, 3# through hole inner fiber measurement, the stress shape of bolt is evaluated using maximum strain can
State and safe condition.
Claims (1)
1. a kind of intelligent bolt for monitoring complicated loads, it is characterised in that described intelligent bolt includes shank of bolt axle, led to
Hole and optical fiber, the shaft section center and shaft section center of shank of bolt axle are radially mutually the position of hexagonal angle with shaft section provided with logical
Hole, totally 4 through holes, a diameter of 1.5mm of through hole；It is equal to be mutually the distance at 120 ° of 3 through hole to shaft section centers, and is all
The half of shank of bolt shaft section radius, paste fixed optical fiber in through hole length range.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720595872.6U CN206709997U (en) | 2017-05-26 | 2017-05-26 | A kind of intelligent bolt for monitoring complicated loads |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720595872.6U CN206709997U (en) | 2017-05-26 | 2017-05-26 | A kind of intelligent bolt for monitoring complicated loads |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206709997U true CN206709997U (en) | 2017-12-05 |
Family
ID=60462753
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720595872.6U Expired - Fee Related CN206709997U (en) | 2017-05-26 | 2017-05-26 | A kind of intelligent bolt for monitoring complicated loads |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206709997U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107024306A (en) * | 2017-05-26 | 2017-08-08 | 大连理工大学 | A kind of intelligent bolt and method for monitoring complicated loads |
| CN109990939A (en) * | 2019-05-10 | 2019-07-09 | 南京工程学院 | A kind of device of roller bolt stress in triangulation feed screw nut |
-
2017
- 2017-05-26 CN CN201720595872.6U patent/CN206709997U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107024306A (en) * | 2017-05-26 | 2017-08-08 | 大连理工大学 | A kind of intelligent bolt and method for monitoring complicated loads |
| CN107024306B (en) * | 2017-05-26 | 2023-02-17 | 大连理工大学 | Intelligent bolt and method for monitoring complex load effect |
| CN109990939A (en) * | 2019-05-10 | 2019-07-09 | 南京工程学院 | A kind of device of roller bolt stress in triangulation feed screw nut |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| TWI510720B (en) | The synchronous pre-tensionable sensing screw with fiber bragg grating devices | |
| CN107271090B (en) | A kind of aircraft wing moment of flexure method of real-time based on fiber grating | |
| CN110220682B (en) | Monitoring device and monitoring method for monitoring bolt looseness | |
| CN206709997U (en) | A kind of intelligent bolt for monitoring complicated loads | |
| CN202582501U (en) | Optical fiber grating strain transducer | |
| CN107014530A (en) | It is a kind of to realize axle power and shearing intelligent bolt and method from monitoring simultaneously | |
| CN102121860A (en) | Corrugated diaphragm type pipe external pressure sensor, oil-water well casing external pressure monitoring device and method | |
| CN202511764U (en) | High-sensitivity fiber grating strain sensor | |
| CN107024306A (en) | A kind of intelligent bolt and method for monitoring complicated loads | |
| CN103277387A (en) | Intelligent bolt for optical fiber grating sensor | |
| CN110007392A (en) | A kind of intelligent fiber plate of compound multi-core optical fiber and preparation method thereof | |
| CN202075181U (en) | Anchor bolt strength testing device | |
| CN203465450U (en) | Strain and temperature dual-parameter optical cable | |
| CN206709998U (en) | It is a kind of to realize the intelligent bolt of axle power and shearing from monitoring simultaneously | |
| CN206943194U (en) | A kind of intelligent gasket device for being used for monitoring bolt loosening based on fiber grating | |
| CN204807129U (en) | Fiber grating stress, meet an emergency and temperature detects bolt | |
| CN102221333A (en) | Temperature-insensitive fiber bragg grating (FBG) displacement sensor with double-isosceles-triangle simply-supported-beam structure | |
| CN208736582U (en) | A kind of FBG tension sensor based on diplopore cantilever beam | |
| CN208420238U (en) | A kind of FBG monitoring device of bolt stress | |
| CN204984740U (en) | Aerogenerator tower section of thick bamboo structure monitoring system | |
| CN101694372A (en) | Intelligent cable fiber grating strain sensor | |
| CN111059123A (en) | Bolt structure capable of measuring pressure and intensity of pressure in real time | |
| CN202088577U (en) | Intelligent composite board for natural bamboo fiber optical fiber | |
| CN104483213A (en) | Test method of strain sensing performance of intelligent carbon fiber plate | |
| CN206756107U (en) | A kind of nut strain and device for detecting temperature based on FBG Sensing Technology |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20171205 Termination date: 20210526 |