CN208456992U - A kind of intelligent bolt for monitoring structural health conditions - Google Patents
A kind of intelligent bolt for monitoring structural health conditions Download PDFInfo
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- CN208456992U CN208456992U CN201820892718.XU CN201820892718U CN208456992U CN 208456992 U CN208456992 U CN 208456992U CN 201820892718 U CN201820892718 U CN 201820892718U CN 208456992 U CN208456992 U CN 208456992U
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- bolt
- structural health
- health conditions
- fixedly installed
- piezoelectric ceramic
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Abstract
The utility model discloses a kind of intelligent bolt for monitoring structural health conditions, including bolt body, the upper end of the bolt body is fixedly installed with blind nut, and the lower end of blind nut is fixedly installed with screw rod.A kind of intelligent bolt for monitoring structural health conditions described in the utility model, equipped with piezoelectric ceramic piece and locking glue, first, it is capable of the bolt pretightening of the important connecting portion of monitoring device structure while the structural health situation of each building block of monitoring device structure, prevent accident, and for batch device, since the installation site of intelligent bolt is relatively fixed, rumble spectrum collected in one equipment is demarcated with other equipment, comparison, comprehensive descision is drawn a conclusion, reduce error, effectively effectively it can also prevent intelligent bolt from loosening, improve safety when equipment uses, bring better prospect of the application.
Description
Technical field
The utility model relates to bolt field, in particular to a kind of intelligent bolt for monitoring structural health conditions.
Background technique
There is the large scale structure much to involve great expense or equipment in engineering fields such as ship, power grid, water conservancy, bridge constructions,
Such as blower, ocean platform, bridge, power transmission tower, port machine, ship.Since these engineering structures or conditions for equipment use are severe,
In long-term use process, due to being connected between each component, component by a variety of causes such as settlement of foundation, overload, burn into transport, dismounting
And it is whole different degrees of damage or deformation can all occur, often occur the serious accidents such as collapse, cause huge economic loss
And casualties.So the monitoring to these large scale structures is imperative.In these structures, bolt is essential portion
Part, is largely used to fix each component, plays very important effect to entire large scale structure.When large scale structure deforms
When, the axle power that these bolts for fixing each section are carried will change at first；Meanwhile the intrinsic frequency of structure various pieces
Also it can change.
In consideration of it, this patent elaborates that one kind can monitoring bolt axle power and monitoring of structures various pieces intrinsic frequency
The intelligent bolt system of variation.The intelligent bolt system structure is independent, can not only be separately monitored everybody with distributed arrangement
Bolt axial force, the variation of the intrinsic frequency of neighbouring component are set, can also be gone out by different location, more bolt networking mode comprehensive descisions
The overall structure health status of large scale structure or equipment, and data are transmitted to monitoring center in a manner of wireless network.
Utility model content
The main purpose of the utility model is to provide a kind of intelligent bolts for monitoring structural health conditions, can effectively solve
Certainly the problems in background technique.
To achieve the above object, the technical solution that the utility model is taken are as follows:
A kind of intelligent bolt for monitoring structural health conditions, including bolt body, the fixed peace in the upper end of the bolt body
Lower end equipped with blind nut, and blind nut is fixedly installed with screw rod.
The upper surface of the blind nut is fixedly installed with piezoelectric ceramic piece, and the upper surface of piezoelectric ceramic piece close to middle position
It is fixedly installed with signal limit film close to middle position, the inside of the piezoelectric ceramic piece is provided with electrode close to upper end position
Layer, and the inside of piezoelectric ceramic piece is provided with piezoceramics layer close to lower end position, between the electrode layer and piezoelectric ceramic piece
Matcoveredn is fixedly mounted.
One end of the bolt body is fixedly connected with tools for bolts ' pretension force tester, and one end of tools for bolts ' pretension force tester
It is remotely connected with computer terminal by wireless telecommunications system, the computer terminal is internally provided with cloud storage.
Preferably, the lower end of the screw rod is evenly arranged with screw thread, and the outer surface of screw rod is provided with locking glue.
Preferably, the inside of the computer terminal is fixedly installed with memory, and memory is internally provided with healthy threshold value.
Preferably, the lower end of the screw rod is provided with nut, and spring shim is provided between screw rod and nut.
Compared with prior art, the utility model has the following beneficial effects: a kind of intelligence for monitoring structural health conditions
Energy bolt, by the piezoelectric ceramic piece of setting, the bolt pretightening for capableing of the important connecting portion of monitoring device structure monitors simultaneously
The structural health situation of each building block of device structure prevents accident, and for batch device, due to intelligent bolt
Installation site it is relatively fixed, allow rumble spectrum collected in an equipment to be demarcated, compared with other equipment,
Comprehensive descision is drawn a conclusion, and reduce error effectively can prevent intelligent bolt from loosening by the locking glue of setting, is improved
Safety when equipment uses, entire intelligent bolt structure is simple, easy to operate, using effect relative to traditional approach more
It is good.
Detailed description of the invention
Fig. 1 is a kind of overall structure diagram of the intelligent bolt for monitoring structural health conditions of the utility model.
Fig. 2 is a kind of blind nut enlarged drawing of the intelligent bolt for monitoring structural health conditions of the utility model.
Fig. 3 is a kind of screw rod enlarged drawing of the intelligent bolt for monitoring structural health conditions of the utility model.
Fig. 4 is a kind of piezoelectric ceramic piece explosion views of the intelligent bolt for monitoring structural health conditions of the utility model.
Fig. 5 is a kind of system diagram of the intelligent bolt for monitoring structural health conditions of the utility model.
In figure: 1, bolt body；2, blind nut；3, screw rod；4, piezoelectric ceramic piece；5, signal limit film；6, screw thread；7, locking
Glue；8, electrode layer；9, protective layer；10, piezoceramics layer；11, tools for bolts ' pretension force tester；12, computer terminal；13, Yun Cun
Storage.
Specific embodiment
To be easy to understand the technical means, creative features, achievement of purpose, and effectiveness of the utility model, below
In conjunction with specific embodiment, the utility model is further described.
As shown in Figs. 1-5, a kind of intelligent bolt for monitoring structural health conditions, including bolt body 1, bolt body 1
Upper end is fixedly installed with blind nut 2, and the lower end of blind nut 2 is fixedly installed with screw rod 3.
The upper surface of blind nut 2 is fixedly installed with piezoelectric ceramic piece 4, and the upper surface of piezoelectric ceramic piece 4 close to middle position
It is fixedly installed with signal limit film 5 close to middle position, the inside of piezoelectric ceramic piece 4 is provided with electrode layer 8 close to upper end position,
And the inside of piezoelectric ceramic piece 4 is provided with piezoceramics layer 10 close to lower end position, it is solid between electrode layer 8 and piezoelectric ceramic piece 4
Dingan County is equipped with protective layer 9；The lower end of screw rod 3 is evenly arranged with screw thread 6, and the outer surface of screw rod 3 is provided with locking glue 7, prevents
Loose glue 7 is a kind of high viscosity, nontoxic, thixotroping shape, water base precoating thread sealant, and after dry, locking glue 7 becomes a kind of bullet
Property, adhesion strength is strong, is not necessarily to cured sealant, effectively can prevent intelligent bolt from loosening；One end of bolt body 1 is fixed to be connected
It is connected to tools for bolts ' pretension force tester 11, and one end of tools for bolts ' pretension force tester 11 is remotely connected with electricity by wireless telecommunications system
Brain terminal 12, computer terminal 12 are internally provided with cloud storage 13；The inside of computer terminal 12 is fixedly installed with memory, storage
Device is internally provided with healthy threshold value；The lower end of screw rod 3 is provided with nut, and is provided with spring shim between screw rod 3 and nut.
It should be noted that the utility model is a kind of intelligent bolt for monitoring structural health conditions, in blind nut 2 when use
Upper surface be fixedly installed with piezoelectric ceramic piece 4 close to middle position, make intelligent bolt, there are two types of such intelligent bolts
Operating mode: active work mode and passive work mode；
Active work mode: measurement bolt pretightening, to ensure that equipment significant points bolt does not loosen, by setting bolt
Force threshold is pre-tightened, remote auto early warning can be carried out；
Passive work mode: when voltage acts on piezoceramics layer 10, machine will be generated with the variation of voltage and frequency
Tool deformation, according to piezoelectric effect, the piezoelectric ceramic piece 4 for being fixed in the upper surface of blind nut 2 can be vibrated with voltage signal acquisition, right
Intelligent bolt vibration time-domain signal collected can carry out frequency domain point to vibration signal collected by Fourier transform
Analysis is changed by the offset of structure all parts dominant frequency in frequency domain and amplitude, carries out monitoring structural health conditions.
Under active work mode, system is program-controlled to the progress radio remote of tools for bolts ' pretension force tester 11 by computer terminal 12
System, tools for bolts ' pretension force tester 11 pass through signal limit according to the instruction issue pulse electrical signal of computer terminal 12, intelligent bolt
Pulse electrical signal is changed into the Mechanical Longitudinal Waves of same frequency by piece 5 and piezoelectric ceramic piece 4, and Mechanical Longitudinal Waves are reflected to form through stud base
Mechanical echoes are changed into electric signal and electric signal are transmitted back to bolt by signal limit film 5 by mechanical echoes, piezoelectric ceramic piece 4
Force tester 11 is pre-tightened, the electric echo signal received is subject to time label by tools for bolts ' pretension force tester 11, through wireless telecommunications
Equipment is transmitted to computer terminal 12, by the post processor of computer terminal 12, can be accurately obtained current pre- of intelligent bolt
Clamp force, the current pretightning force of the intelligent bolt measured can be uploaded to cloud storage 13 by computer terminal 12, and can access downloading at any time
Historical data in cloud storage 13 grasps the situation of change of the pretightning force of intelligent bolt；
Under passive work mode, system is program-controlled to the progress radio remote of tools for bolts ' pretension force tester 11 by computer terminal 12
System, tools for bolts ' pretension force tester 11 are made pottery in intelligent bolt by signal limit film 5 and piezoelectricity according to the instruction of computer terminal 12
Tile 4 acquires vibration signal in real time, and collected vibration signal is carried out Fourier transform by tools for bolts ' pretension force tester 11, defeated
Time-frequency spectrum out is transmitted to computer terminal 12 through wireless telecommunications system, by the post processor of computer terminal 12, according to setting in advance
The threshold value set carries out structure health assessment, and the time-frequency spectrum of the intelligent bolt measured can be uploaded to cloud storage by computer terminal 12
13, the mode according to deep learning carries out pattern-recognition, more accurately to determine the structural health of intelligent bolt place equipment
Situation, for batch device, since the installation site of intelligent bolt is relatively fixed, so that vibration frequency collected in an equipment
Spectrum can be demarcated with other equipment, be compared, and comprehensive descision is drawn a conclusion, and reduce error, more practical.
The basic principles and main features of the present invention and the advantages of the present invention have been shown and described above.Current row
The technical staff of industry is described in above embodiments and description it should be appreciated that the present utility model is not limited to the above embodiments
Only illustrate the principles of the present invention, on the premise of not departing from the spirit and scope of the utility model, the utility model is also
It will have various changes and improvements, these various changes and improvements fall within the scope of the claimed invention.The utility model
Claimed range is defined by the appending claims and its equivalent thereof.
Claims (4)
1. a kind of intelligent bolt for monitoring structural health conditions, including bolt body (1), it is characterised in that: the bolt body
(1) upper end is fixedly installed with blind nut (2), and the lower end of blind nut (2) is fixedly installed with screw rod (3),
The upper surface of the blind nut (2) is fixedly installed with piezoelectric ceramic piece (4) close to middle position, and piezoelectric ceramic piece (4)
Upper surface is fixedly installed with signal limit film (5) close to middle position, and the inside of the piezoelectric ceramic piece (4) is close to upper end position
It is provided with electrode layer (8), and the inside of piezoelectric ceramic piece (4) is provided with piezoceramics layer (10), the electricity close to lower end position
Matcoveredn (9) are fixedly mounted between pole layer (8) and piezoelectric ceramic piece (4),
One end of the bolt body (1) is fixedly connected with tools for bolts ' pretension force tester (11), and tools for bolts ' pretension force tester
(11) one end is remotely connected with computer terminal (12) by wireless telecommunications system, and computer terminal (12) are internally provided with
Cloud storage (13).
2. a kind of intelligent bolt for monitoring structural health conditions according to claim 1, it is characterised in that: the screw rod
(3) lower end is evenly arranged with screw thread (6), and the outer surface of screw rod (3) is provided with locking glue (7).
3. a kind of intelligent bolt for monitoring structural health conditions according to claim 1, it is characterised in that: the computer is whole
The inside at end (12) is fixedly installed with memory, and memory is internally provided with healthy threshold value.
4. a kind of intelligent bolt for monitoring structural health conditions according to claim 1, it is characterised in that: the screw rod
(3) lower end is provided with nut, and is provided with spring shim between screw rod (3) and nut.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820892718.XU CN208456992U (en) | 2018-06-11 | 2018-06-11 | A kind of intelligent bolt for monitoring structural health conditions |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820892718.XU CN208456992U (en) | 2018-06-11 | 2018-06-11 | A kind of intelligent bolt for monitoring structural health conditions |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208456992U true CN208456992U (en) | 2019-02-01 |
Family
ID=65160812
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820892718.XU Active CN208456992U (en) | 2018-06-11 | 2018-06-11 | A kind of intelligent bolt for monitoring structural health conditions |
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| Country | Link |
|---|---|
| CN (1) | CN208456992U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109668672A (en) * | 2019-01-08 | 2019-04-23 | 中国大唐集团新能源科学技术研究院有限公司 | Ultrasonic bolt pre-tightens force measuring method |
| CN110173399A (en) * | 2019-06-06 | 2019-08-27 | 上海电力学院 | A kind of offshore wind turbine bolt looseness detection system and method |
-
2018
- 2018-06-11 CN CN201820892718.XU patent/CN208456992U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109668672A (en) * | 2019-01-08 | 2019-04-23 | 中国大唐集团新能源科学技术研究院有限公司 | Ultrasonic bolt pre-tightens force measuring method |
| CN110173399A (en) * | 2019-06-06 | 2019-08-27 | 上海电力学院 | A kind of offshore wind turbine bolt looseness detection system and method |
| CN110173399B (en) * | 2019-06-06 | 2023-07-04 | 上海电力学院 | Bolt loosening detection system and method for offshore wind turbine generator set |
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