CN108535355A - Steel section member damage overall-process monitors system and monitoring method - Google Patents
Steel section member damage overall-process monitors system and monitoring method Download PDFInfo
- Publication number
- CN108535355A CN108535355A CN201810759722.3A CN201810759722A CN108535355A CN 108535355 A CN108535355 A CN 108535355A CN 201810759722 A CN201810759722 A CN 201810759722A CN 108535355 A CN108535355 A CN 108535355A
- Authority
- CN
- China
- Prior art keywords
- section member
- steel section
- damage
- mobile control
- control platform
- 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.)
- Granted
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
- G01N27/72—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables
- G01N27/82—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables for investigating the presence of flaws
- G01N27/83—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables for investigating the presence of flaws by investigating stray magnetic fields
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Investigating Or Analyzing Materials By The Use Of Magnetic Means (AREA)
Abstract
The invention discloses a kind of Steel section member damage overall-process to monitor system, including mobile control platform, magnetic sensing probe and control system.Mobile control platform is for being set to Steel section member.Magnetic sensing probe is set in mobile control platform, and mobile control platform drives the movement of magnetic sensing probe, to obtain the three-dimensional magnetic induction intensity of Steel section member.Control system is communicated to connect with mobile control platform and magnetic sensing probe, with the mobile control platform of control and the work of magnetic sensing probe, and according to mobile control platform and magnetic sensing probe feedack, the damage position and lesion size that Steel section member develops with load at any time is calculated.The invention also discloses a kind of Steel section member damage overall-process monitoring method, Steel section member damage monitoring and early warning under complicated severe Service Environment are solved the problems, such as, be not required to paint-removing, surface layer sheath, do not influence steel construction use, it is easy to operate.And it is possible to monitor the overall process of damage, while monitoring damage position and lesion size.
Description
Technical field
The present invention relates to damage monitoring technical fields, and in particular to a kind of Steel section member damage overall-process damage monitoring system
And monitoring method.
Background technology
The damage of traditional Steel section member relies primarily on personal monitoring, and when monitoring needs to remove steel construction paint, sheath etc.
Protective layer, the external degree of injury of main detection steel construction, this method working efficiency is low and low precision, needs to expend a large amount of
Manpower and materials, wind and rain effect under working at height prodigious threat is caused to the safety of survey crew.
In the latest 20 years, Steel section member damage monitoring method mainly have electric resistance strain film method, magnetic leakage monitoring method, ultrasonic wave,
Magnetic Memory technology, acoustic emission, piezoelectric material-polyvinylidene fluoride sensing technology (Polyvinylidene Fluoride,
PVDF), fiber grating sensing technology, infrared thermography etc..Wherein, resistance strain gage is point type monitoring mode, needs to arrange
A large amount of resistance strain gage is easily influenced by environment electromagnetics interference, and is unable to monitor the large deformation damage in later stage.Magnetic leakage monitors
Method needs special magnetizing equipment to apply external magnetic field, and it is relatively low to operate very cumbersome and monitoring accuracy.Due to Steel section member table
All there are genetic defects in face, monitoring ultrasonic method error in shaped steel damage monitoring is larger.Metal magnetic memory only can be effectively right
Ferrimagnet carries out earlier damage judgement, the position of damage is only can determine whether, for the size None- identified of damage.Separately
Outside, microdefect and earlier damage only be can determine whether, for later stage macroscopic damage None- identified.Damage monitoring master based on sound emission
It to study in laboratory environments, acoustic wave character variation is fainter, is easy in engineering by the serious dry of high ambient noise signal
It disturbs.The difficulties such as PVDF sensing technologies, fiber grating strain sensor technology, infrared thermography, high frequency guided wave, ultrasonic surface wave technology
To be operated under severe Service Environment, when test, needs to remove the protection of the surface layers such as paint of steel construction, presence signal interference reconciliation
Analysis problem, and only recognizable damage position, and have difficulties at the quantitative aspect of damage scale.
In conclusion existing steel structure steel member damage monitoring method has the following disadvantages：(1) it needs to remove steel construction
Paint, the sheath on Steel section member surface etc., it is cumbersome, it is difficult to be on active service in complex environments such as acid rain, rain wind induced vibrations；(2) can not
The position of identification of damage and the size of damage simultaneously；(3) due to high certainty of measurement and range is smaller, may only identify microcosmic damage
Wound, the None- identified macroscopic damage more than range；(4) measurement accuracy is low and range is larger, only recognizable macroscopic damage, Wu Fayou
Effect identification microscopic damage；(5) microscopic damage and macroscopic damage can not be identified simultaneously, can not obtain damage overall-process information.
Invention content
Based on this, it is necessary to, the overall process of None- identified damage cumbersome for traditional shaped steel monitoring method, and nothing
Method identification of damage position and the problem of lesion size simultaneously provides a kind of Steel section member damage overall-process monitoring system and monitoring side
Method.
A kind of Steel section member damage overall-process monitoring system, including：
Mobile control platform, for being set to Steel section member；
Magnetic sensing probe is set in the mobile control platform, and the movement of the mobile control platform drives the magnetic
Sensing probe moves, to obtain the three-dimensional magnetic induction intensity of Steel section member different location；And
Control system is communicated to connect with the mobile control platform and the magnetic sensing probe, to control the mobile control
Platform processed and magnetic sensing probe work, and according to the mobile control platform and the magnetic sensing probe feedack,
The damage position and lesion size that the Steel section member develops with load at any time is calculated.
The mobile control platform includes sucker, slide unit, the first power supply and the first wireless biography in one of the embodiments,
Defeated module, for being adsorbed in the Steel section member, the slide unit is movably arranged on the sucker sucker, described
First power supply is electrically connected with the slide unit and first wireless transport module respectively, first wireless transport module respectively with
The slide unit and control system communication connection.
The quantity of the sucker is two in one of the embodiments, and two suckers are arranged at intervals at the cunning
On platform.
The magnetic sensing probe includes shell, magnetic sensor, second source and second in one of the embodiments,
Wireless transport module, the shell are set in the mobile control platform, the magnetic sensor, the second source and
Second wireless transport module may be contained in the shell, the second source respectively with the magnetic sensor and institute
State the second wireless transport module electrical connection, second wireless transport module respectively with the magnetic sensor and the control
System communication connects.
A kind of Steel section member damage overall-process monitoring system monitoring Steel section member using described in above-mentioned any one damages
Method, include the following steps：
Mobile control platform is set on the Steel section member, using an end of the Steel section member as origin, institute
The length direction of Steel section member is stated, i.e., the direction of selected end to another end is Z-direction, the Steel section member
Width direction be Y direction, the short transverse of the Steel section member is X-direction, builds three-dimensional system of coordinate；
Control system controls the mobile control platform and is moved along the Z-direction, so that described in magnetic induction probe acquisition
The three-dimensional magnetic induction intensity of Steel section member, and the three-dimensional magnetic induction intensity is transferred in the control system；And
The control system handles the three-dimensional magnetic induction intensity, further sends signal and repeatedly adjusts the shifting
The sample frequency of the movement speed and magnetic induction probe of dynamic control platform, obtains the movement to match with lesion size
The sample frequency of the movement speed of control platform and magnetic induction probe, at the calculating of the three-dimensional magnetic induction intensity
Reason, obtains the damage position and lesion size of the Steel section member.
The control system is calculated the step of damage position of the Steel section member and has in one of the embodiments,
Body is：
S1) in the Z-direction, the movement speed of the mobile control platform is：
U=dresf
In formula, dresFor damage monitoring resolution ratio, u is the movement speed of the mobile control platform, and f visits for Magnetic Sensor
The sample frequency of magnetic sensor in head；
S2) develop at any time with load, multiple sample sequences correspondingly formed during the magnetic sensing probe movement,
For ith sample sequence, the magnetic induction intensity that the magnetic sensor measures X-axis, Y-axis and Z-direction is respectively Bx
(zi), By(zi) and Bz(zi), wherein sampling location ziFor：
zi=(i-1) dres；
S3 each moment magnetic induction density B) is calculatedx(zi), By(zi) and Bz(zi) magnetic field gradient in the Z-direction
Bxz(zi)、Byz(zi) and Bzz(zi)：
S4 the magnetic field gradient B at each moment) is calculatedxz(zi)、Byz(zi) and Bzz(zi) contract in the part in z-axis direction, it is fixed
Justice is local modulus CZ(zi)：
S5 damage position of the Steel section member in the Z-direction) is determined
And
S6 C) is drawnZZ(zi) and ziBetween relation curve, be the Steel section member at the mutation of the relation curve
The damage position in the Z-direction；
S7) movement speed of the mobile control platform reduces half, and the sample frequency of the magnetic sensor is kept
It is constant, the damage monitoring resolution ratio dresValue also reduce 50%, repeat step S1)-S6), C is calculatedZZ(zi) and zi's
Relation curve, to obtain the Steel section member along a series of damage position of the Z-direction.
The step of lesion size is calculated in the control system in one of the embodiments, be specially：
(1) damage position is positioned as zj, with the damage position zjCentered on, it is chosen along described Z-direction or so
Preset length a composition scanning ranges [zj- a, zj+a]；
(2) in the scanning range [zj- a, zj+ a] in, with damage monitoring resolution ratio dres0The Steel section member is carried out
Damage monitoring, then in the scanning range [zj- a, zj+ a] in sampling the frequency be 2a/dres0, in the scanning range [zj- a, zj+
A] in for the first time scan when, the damage monitoring resolution ratio dres0Equal to the damage monitoring resolution ratio dres；
(3) it calculates in the scanning range [zj- a, zj+ a] interior each position the magnetic field gradient in the Z-direction
Part contract, be defined as local modulus CZ(zk)
zk=zj-a+(k-1)dres0
In formula, Bxz(zk)、Byz(zk) and Bzz(zk) it is respectively magnetic induction density Bx(zk), By(zk) and Bz(zk) along Z axis
The magnetic field gradient in direction, wherein zkFor sampling location, Bxz(zk)、Byz(zk) and Bzz(zk) be calculated by above-mentioned formula (a)；
(4) the local modulus C is calculatedZ(zk) to zkSecond dervative：
(5) reducing the movement speed of the mobile control platform, the sample frequency of the magnetic sensor remains unchanged,
Aforementioned (1)-(4) are constantly repeated, until the scanning range [zj- a, zj+ a] second damage position of interior appearance, record the two
The sequence number of damage position is respectively sequentially k=l, k=m, wherein l ＜ m, and record corresponding damage monitoring at this time
Resolution ratio dres0k, then it is in [zj- a, zj+ a] within position be respectively zLAnd zM；And
(6) in Steel section member damage position zjPlace, corresponding lesion size are：
dzj=(m-l) dres0k。
The Steel section member is divided into several equal portions along its length in one of the embodiments, by the movement
Control platform is respectively arranged on the Steel section member of each equal portions, with to the institute in the entire Steel section member Z-direction
It states damage position and the lesion size is monitored, to complete the damage position of the entire Steel section member length direction
Set the monitoring with lesion size.
Above-mentioned Steel section member damage overall-process monitoring system and monitoring method, can be in the complicated evil such as acid rain and rain wind induced vibration
Steel section member damage monitoring and early warning problem, are not required to paint-removing and surface layer sheath etc., do not influence steel construction under bad Service Environment
It uses, it is easy to operate.Control system can control the movement speed of mobile control platform and adopting for magnetic sensor sensor
Sample frequency obtains the sample frequency of the movement speed and three axis time sensor of the control platform to match with lesion size, dynamic
Adjust damage monitoring resolution ratio, thus it is possible to vary measurement accuracy, so as to identify microscopic damage and macroscopic damage simultaneously, so that should
Monitoring system can monitor the overall process of damage.Also, Steel section member damage overall-process monitoring system can monitor damage simultaneously
Hinder position and lesion size, program can be saved, improves monitoring efficiency.
Description of the drawings
Fig. 1 is the structural schematic diagram that an embodiment Shaped Steel component damage overall process monitors system；
Fig. 2 is the structural schematic diagram of mobile control platform in Fig. 1；
Fig. 3 is the structural schematic diagram of magnetic sensing probe in Fig. 1；
Fig. 4 is the flow chart of an embodiment Shaped Steel component damage overall process monitoring method.
Specific implementation mode
In order to make the foregoing objectives, features and advantages of the present invention clearer and more comprehensible, below in conjunction with the accompanying drawings to the present invention
Specific implementation mode be described in detail.Many details are elaborated in the following description in order to fully understand this hair
It is bright.But the invention can be embodied in many other ways as described herein, those skilled in the art can be not
Similar improvement is done in the case of violating intension of the present invention, because the invention is not limited by following public specific implementation.
It should be noted that when element is referred to as " being fixed on " another element, it can be directly on another element
Or there may also be elements placed in the middle.When an element is considered as " connection " another element, it can be directly connected to
To another element or it may be simultaneously present centering elements.Term as used herein " vertical ", " horizontal ", " left side ",
" right side " and similar statement for illustrative purposes only, are not offered as being unique embodiment.
Unless otherwise defined, all of technologies and scientific terms used here by the article and belong to the technical field of the present invention
The normally understood meaning of technical staff is identical.Used term is intended merely to description tool in the description of the invention herein
The purpose of the embodiment of body, it is not intended that in the limitation present invention.
Referring to Fig. 1, the Steel section member damage overall-process in an embodiment monitors system 10, shaped steel can be directly monitored
Damage position in component 20 and lesion size, it is easy to operate.Specifically, Steel section member damage overall-process monitoring system 10 is wrapped
Include mobile control platform 100, magnetic sensing probe 200 and control system 300.
Mobile control platform 100 is for being set to Steel section member 20.Magnetic sensing probe 200 is set to mobile control platform
On 100, the movement of mobile control platform 100 drives magnetic sensing probe 200 to move, to obtain the three of 20 different location of Steel section member
Tie up magnetic induction intensity.Control system 300 is communicated to connect with mobile control platform 100 and magnetic sensing probe 200, with the mobile control of control
Platform 100 and magnetic sensing probe 200 processed work, and according to mobile control platform 100 and 200 feedack of magnetic sensing probe,
The damage position and lesion size that Steel section member 20 develops with load at any time is calculated.
Also referring to Fig. 2, specifically, mobile control platform 100 include sucker 110, slide unit 120, the first power supply 130 and
First wireless transport module 140.Sucker 110 is for being adsorbed in Steel section member 20, to set entire mobile control platform 100
It is placed on Steel section member 20.In one embodiment, sucker 110 is mechanical vacuum sucker.The quantity of sucker 110 be two, two
The setting of the interval of a sucker 110, the stabilization placed with the entire mobile control platform 100 of guarantee.Slide unit 120 is movably arranged at suction
On disk 110, two suckers 110 can ensure the stabilization that slide unit 120 moves.First power supply 130 respectively with slide unit 120 and the first nothing
Line transmission module 140 is electrically connected, to give slide unit 120 and the first wireless transport module 140 to provide electric energy.First wireless transport module
140 communicate to connect with slide unit 120 and control system 300 respectively, and the control signal that control system 300 is sent out can be transferred to
The movement velocity of slide unit 120 to control the movement of slide unit 120, and is transferred to control system 300 by slide unit 120.
Also referring to Fig. 3, magnetic sensing probe 200 include shell 210, magnetic sensor 220, second source 230 and
Second wireless transport module 240.Shell 210 is set on slide unit 120, and the shell 210 of the movement band of slide unit 120 moves.Three axis
Magnetic Sensor 220, second source 230 and the second wireless transport module 240 may be contained in shell 210.Second source 230 is distinguished
It is electrically connected with magnetic sensor 220 and the second wireless transport module 240, to give magnetic sensor 220 and the second wireless biography
Defeated module 240 provides electricity.Second wireless transport module 240 respectively with 300 communication link of magnetic sensor 220 and control system
It connects.The control signal transmission that second wireless transport module 240 can send out control system 300 to magnetic sensor 220, with
Magnetic sensor 220 is controlled to work.Also, magnetic sensor 220 by the three-dimensional magnetic induction intensity of acquisition and can be adopted
Sample frequency can be transferred to control system 300.
Control system 300 can be computer control system 300.Computer control system 300 can control slide unit 120
Movement speed controls the sample frequency of magnetic sensor 220, to control the damage monitoring point of entire magnetic sensing probe 200
Resolution.During 20 damage monitoring of Steel section member, control system 300 can obtain what the monitoring of magnetic sensor 220 obtained
Three-dimensional magnetic induction intensity, then control system 300 damage position and lesion size are finally obtained by a series of calculating.
Referring to Fig. 4, the present invention also provides a kind of 20 damage overall-process monitoring methods of Steel section member.To realize the shaped steel structure
20 damage overall-process monitoring method of part uses above-mentioned Steel section member damage overall-process monitoring system 10.The Steel section member damages
Overall process monitoring method specifically comprises the following steps：
Step S110：Mobile control platform 100 is set on Steel section member 20, is with an end of Steel section member 20
Origin, the length direction of Steel section member 20, i.e., the direction of selected end to another end are Z-direction, Steel section member
20 width direction is Y direction, and the short transverse of Steel section member 20 is Z-direction, builds three-dimensional system of coordinate.
Specifically, mobile control platform 100 is set on Steel section member 20, and the absorption of sucker 110 is made to be fixed on shaped steel
On component 20, to which entire mobile control platform 100 is set on Steel section member 20.At this point, three in magnetic sensing probe 200
Axial magnetic sensor 220 is opposite with the surface of Steel section member 20, so that magnetic sensor 220 can obtain the three of Steel section member 20
Tie up magnetic induction intensity.Control system 300 adjusts the position of slide unit 120, and magnetic sensing probe 200 is made to be located at the starting of Steel section member 20
End ensures that magnetic sensing probe 200 can monitor entire Steel section member 20 from the beginning to the end.Also, make the three of magnetic sensor 220
Dimension coordinate system is consistent with the three-dimensional system of coordinate built on Steel section member 20.
Step S120：The control movement of control system 300 control platform 100 is moved along Z-direction, so that magnetic sensing probe
200 obtain the three-dimensional magnetic induction intensity of Steel section member 20, and three-dimensional magnetic induction intensity is transferred in control system 300.
Specifically, control system 300 sends signal to the first wireless transport module 140 in mobile control platform 100, far
Slide unit 120 in process control movement control platform 100 is moved along the length direction of Steel section member 20.The movement of slide unit 120 drives
Magnetic sensing probe 200 moves, and magnetic sensing probe 200 is shifted along, and the magnetic sensor 220 in magnetic sensing probe 200 is surveyed
Steel section member 20 three-dimensional magnetic induction intensity, then the second wireless transport module 240 in magnetic sensing probe 200 is by shaped steel structure
The three-dimensional magnetic induction intensity of part 20 is transmitted in control system 300.
Step 130：Control system 300 handles three-dimensional magnetic induction intensity, further sends signal and repeatedly adjusts shifting
The sample frequency of the movement speed and magnetic sensing probe 200 of dynamic control platform 100, obtains the mobile control to match with lesion size
The movement speed of platform 100 processed and the sample frequency of magnetic sensing probe 200 are obtained according to the calculation processing of three-dimensional magnetic induction intensity
To the damage position and lesion size of Steel section member 20.
Specifically, control system 300 handles the three-dimensional magnetic induction intensity of Steel section member 20, is then further sent out
Signal repeatedly adjusts the sampling of the magnetic sensor 220 in the movement speed and magnetic sensing probe 200 of mobile control platform 100
Frequency obtains the movement speed of the mobile control platform 100 to match with lesion size and the sampling frequency of magnetic sensor 220
Rate, dynamic adjust the damage monitoring resolution ratio of magnetic sensing probe 200.Finally according to three-dimensional magnetic induction intensity, shaped steel is calculated
The damage position of component 20, and lesion size is calculated according to damage position.
Specifically, control system 300 is calculated the step of damage position of Steel section member 20 and is specially：
S1) in the length direction of Steel section member 20, i.e. Z-direction, the movement speed of mobile control platform 100 is：
U=dresf
In formula, dresFor damage monitoring resolution ratio, u is the movement speed of mobile control platform 100, unit m/s, f tri-
The sample frequency of axial magnetic sensor 220.When testing for the first time, dresTake 0.001m, f=1000Hz.
S2) in mobile control platform 100 in the motion range of slide unit 120, magnetic sensing probe 200 is with slide unit 120
It moves and carries out high-speed sampling.Develop at any time with load, magnetic sensing probe 200 is moved to another from one end of Steel section member 20
End, correspondingly forms multiple sample sequences.For ith sample sequence, the magnetic sensor 220 in magnetic sensing probe 200
The magnetic induction intensity for measuring X-axis, Y-axis and Z-direction is respectively Bx(zi), By(zi) and Bz(zi), sampling location ziFor：
zi=(i-1) dres。
S3 each moment magnetic induction density B) is calculatedx(zi)、By(zi) and Bz(zi) magnetic field gradient in the Z-axis direction
In formula, Bxz(zi)、Byz(zi) and Bzz(zi) it is respectively magnetic induction density Bx(zi), By(zi), Bz(zi) along Z axis side
To magnetic field gradient.
S4 the magnetic field gradient B at each moment) is calculatedxz(zi)、Byz(zi) and Bzz(zi) contract in the part of Z-direction, it is fixed
Justice is local modulus CZ(zi):
S5 damage position z of the Steel section member 20 in the Z-direction) is determinedi
S6 C) is drawnZZ(zi) and ziBetween relation curve, be Steel section member 20 at the mutation of relation curve in Z axis side
Upward damage position.
S7 the movement speed of slide unit 120 in mobile control platform 100) is reduced into half, the sampling of magnetic sensor 220
Frequency remains unchanged, i.e. f=1000Hz, then by damage monitoring resolution ratio dresValue also reduce 50%, repeat S1)-S6), obtain
A plurality of CZZ(zi) and ziCurve.It is the damage of 20 length direction of Steel section member when curve is mutated, at curve mutation
Position records corresponding damage monitoring resolution ratio d at this timeresiAnd the movement speed u of movement control platform 100i, obtain shaped steel structure
The a series of damage position of 20 length direction of part.Wherein, when detecting damage position, damage monitoring resolution ratio dresMinimum takes
0.000001m, i.e., 1 micron.
After the damage position for measuring Steel section member 20 according to preceding method, the side of 20 lesion size of Steel section member is calculated
Method is specially：
(1) the aforementioned damage position being calculated is positioned as zj, with damage position zjCentered on, it is selected along Z-direction or so
Take preset length a composition scanning ranges [zj- a, zj+a].Specifically, with damage position zjCentered on, left and right takes 0.01m, that is, sweeps
Retouch ranging from [zj-0.01,zj+0.01]。
(2) in scanning range [zj- a, zj+ a] in, with damage monitoring resolution ratio dres0Damage prison is carried out to Steel section member 20
It surveys.Wherein, the movement speed of mobile control platform 100 is u0, the sampling frequency of magnetic sensor 220 in magnetic sensing probe 200
Rate is f0=10000Hz, then in scanning range [zj- a, zj+ a] in sampling the frequency be 2a/dres0.Wherein, in scanning range [zj-
A, zj+ a] in for the first time scan when, make damage monitoring resolution ratio dres0Equal to damage monitoring resolution ratio dres。
(3) with damage monitoring resolution ratio dres0, in scanning range [zj- a, zj+ a] in, damage prison is carried out to Steel section member 20
It surveys.It calculates in scanning range [zj- a, zj+ a] magnetic field gradient of interior each position contracts in the part of Z-direction, it is defined as part
Modulus CZ(zk), wherein：
zk=zj-a+(k-1)dres0
In formula, Bxz(zk)、Byz(zk) and Bzz(zk) it is respectively magnetic induction density Bx(zk), By(zk) and Bz(zk) along Z axis
The magnetic field gradient in direction, wherein zkFor sampling location, Bxz(zk)、Byz(zk) and Bzz(zk) with the formula of aforementioned calculating magnetic field gradient
Identical, details are not described herein.
(4) local modulus C is calculatedZ(zk) to zkSecond dervative：
(5) reduce the movement speed u of mobile control platform 1000, the sample frequency of magnetic sensor 220 is constant, then damages
Wound monitoring resolution ratio dres0Also corresponding to reduce.Specifically, the movement speed u of mobile control platform 1000Reduce half, three axis magnetic pass
The sample frequency f of sensor 2200=10000Hz, then damage monitoring resolution ratio dres0Value also reduce 50%.It constantly repeats aforementioned
(1)-(4) so that the value of damage monitoring resolution ratio constantly reduces, i.e., damage monitoring precision is continuously improved, to scanning range [zj-
A, zj+ a] Steel section member 20 constantly repeat to detect, until scanning range [zj- a, zj+ a] in occur second damage position
It sets.Priority Serial No. k=l, the k=m of the two damage positions, wherein l ＜ m are recorded, and records corresponding damage prison at this time
Survey resolution ratio dres0k, then in scanning range [zj- a, zj+ a] within position be respectively zLAnd zM.Wherein, damage monitoring resolution ratio
dres0Minimum takes 0.0000001m, i.e., 0.1 micron.
(6) in 20 damage position z of Steel section memberjPlace, corresponding lesion size are：
dzj=(m-l) dres0k。
Steel section member 20 computational methods of the corresponding lesion size of other damage position and above-mentioned phase in the Z-axis direction
Together, this will not be detailed here.
In one embodiment, since the length of Steel section member 20 is longer, and entire Steel section member damage overall-process monitoring system
The monitoring range of system 10 is limited.Therefore Steel section member 20 can be divided into several equal portions along its length, mobile control is flat
The absorption of sucker 110 of platform 100 is fixed on the Steel section member 20 of each equal portions, and monitors the damage position of the equal portions Steel section member 20
It sets and lesion size.Lower sucker 110 is dismantled after monitoring, is then fixedly mounted on next equal portions Steel section member 20 and is supervised
Survey, to complete 20 length direction of Steel section member damage position and lesion size monitoring.
Above-mentioned Steel section member damage overall-process monitoring system 10 and 20 damage monitoring method of Steel section member, can in acid rain and
20 damage monitoring of Steel section member and early warning problem under the complicated severe Service Environment such as rain wind induced vibration, are not required to paint-removing and surface layer shield
Set etc. does not influence steel construction use, easy to operate.Steel section member damage overall-process monitor system 10 can simultaneously identification of damage position
It sets and lesion size, monitoring program can be saved, efficiency is higher.Also, the mobile control platform of more than 300 adjustment of control system
The sample frequency of 100 movement speed and magnetic sensor 220 obtains the mobile control platform to match with damage scale
The sample frequency of 100 movement speed and magnetic sensor 220, dynamic adjust damage monitoring resolution ratio, thus it is possible to vary measure
Precision, so that the monitoring system can monitor the overall process of damage, is fitted so as to identify microscopic damage and macroscopic damage simultaneously
It is wider with range.
Each technical characteristic of embodiment described above can be combined arbitrarily, to keep description succinct, not to above-mentioned reality
It applies all possible combination of each technical characteristic in example to be all described, as long as however, the combination of these technical characteristics is not deposited
In contradiction, it is all considered to be the range of this specification record.
Several embodiments of the invention above described embodiment only expresses, the description thereof is more specific and detailed, but simultaneously
It cannot therefore be construed as limiting the scope of the patent.It should be pointed out that coming for those of ordinary skill in the art
It says, without departing from the inventive concept of the premise, various modifications and improvements can be made, these belong to the protection of the present invention
Range.Therefore, the protection domain of patent of the present invention should be determined by the appended claims.
Claims (8)
1. a kind of Steel section member damage overall-process monitors system, which is characterized in that including：
Mobile control platform, for being set to Steel section member；
Magnetic sensing probe is set in the mobile control platform, and the movement of the mobile control platform drives the magnetic sensing
Probe movement, to obtain the three-dimensional magnetic induction intensity of Steel section member different location；And
Control system is communicated to connect with the mobile control platform and the magnetic sensing probe, flat to control the mobile control
Platform and magnetic sensing probe work, and according to the mobile control platform and the magnetic sensing probe feedack, calculate
Obtain the damage position and lesion size that the Steel section member develops with load at any time.
2. Steel section member damage overall-process according to claim 1 monitors system, which is characterized in that the mobile control is flat
Platform includes sucker, slide unit, the first power supply and the first wireless transport module, and the sucker is used to be adsorbed in the Steel section member,
The slide unit is movably arranged on the sucker, and first power supply is wirelessly transferred with the slide unit and described first respectively
Module is electrically connected, and first wireless transport module is communicated to connect with the slide unit and the control system respectively.
3. Steel section member damage overall-process according to claim 2 monitors system, which is characterized in that the quantity of the sucker
It it is two, two suckers are arranged at intervals on the slide unit.
4. Steel section member damage overall-process according to claim 1 monitors system, which is characterized in that the magnetic sensing probe
Including shell, magnetic sensor, second source and the second wireless transport module, it is flat that the shell is set to the mobile control
On platform, the magnetic sensor, the second source and second wireless transport module may be contained in the shell, institute
It states second source to be electrically connected with the magnetic sensor and second wireless transport module respectively, second wireless transmission
Module is communicated to connect with the magnetic sensor and the control system respectively.
5. a kind of Steel section member damage overall-process using as described in Claims 1 to 4 any one monitors system monitoring shaped steel
The method of component damage, which is characterized in that include the following steps：
Mobile control platform is set on the Steel section member, using an end of the Steel section member as origin, the type
The length direction of steel member, i.e., the direction of selected end to another end are Z-direction, the width of the Steel section member
Degree direction is Y direction, and the short transverse of the Steel section member is X-direction, builds three-dimensional system of coordinate；
Control system controls the mobile control platform and is moved along the Z-direction, so that magnetic induction probe obtains the shaped steel
The three-dimensional magnetic induction intensity of component, and the three-dimensional magnetic induction intensity is transferred in the control system；And
The control system handles the three-dimensional magnetic induction intensity, further sends signal and repeatedly adjusts the mobile control
The sample frequency of the movement speed of platform processed and magnetic induction probe obtains the mobile control to match with lesion size
The sample frequency of the movement speed of platform and magnetic induction probe is obtained according to the calculation processing of the three-dimensional magnetic induction intensity
To the damage position and lesion size of the Steel section member.
6. Steel section member damage monitoring method according to claim 5, which is characterized in that the control system is calculated
The step of damage position of the Steel section member is specially：
S1) in the Z-direction, the movement speed of the mobile control platform is：
U=dresf
In formula, dresFor damage monitoring resolution ratio, u is the movement speed of the mobile control platform, and f is in magnetic sensing probe
Magnetic sensor sample frequency；
S2) develop at any time with load, multiple sample sequences are correspondingly formed during the magnetic sensing probe movement, for
Ith sample sequence, the magnetic induction intensity that the magnetic sensor measures X-axis, Y-axis and Z-direction are respectively Bx(zi), By
(zi) and Bz(zi), wherein sampling location ziFor：
zi=(i-1) dres；
S3 each moment magnetic induction density B) is calculatedx(zi), By(zi) and Bz(zi) magnetic field gradient B in the Z-directionxz
(zi)、Byz(zi) and Bzz(zi)：
S4 the magnetic field gradient B at each moment) is calculatedxz(zi)、Byz(zi) and Bzz(zi) contract in the part in z-axis direction, it is defined as
Local modulus CZ(zi)：
S5 damage position of the Steel section member in the Z-direction) is determined
And
S6 C) is drawnZZ(zi) and ziBetween relation curve, be the Steel section member at the mutation of the relation curve described
The damage position in Z-direction；
S7) movement speed of the mobile control platform reduces half, and the sample frequency of the magnetic sensor remains unchanged,
The damage monitoring resolution ratio dresValue also reduce 50%, repeat step S1)-S6), C is calculatedZZ(zi) and ziRelationship
Curve, to obtain the Steel section member along a series of damage position of the Z-direction.
7. Steel section member damage monitoring method according to claim 6, which is characterized in that the control system is calculated
The step of lesion size is specially：
(1) damage position is positioned as zj, with the damage position zjCentered on, it is chosen along described Z-direction or so default
Length a composition scanning ranges [zj- a, zj+a]；
(2) in the scanning range [zj- a, zj+ a] in, with damage monitoring resolution ratio dres0The Steel section member is damaged
Monitoring, then in the scanning range [zj- a, zj+ a] in sampling the frequency be 2a/dres0, in the scanning range [zj- a, zj+ a] in
When scanning for the first time, the damage monitoring resolution ratio dres0Equal to the damage monitoring resolution ratio dres；
(3) it calculates in the scanning range [zj- a, zj+ a] interior each position the magnetic field gradient the Z-direction office
Portion contracts, and is defined as local modulus CZ(zk)
zk=zj-a+(k-1)dres0
In formula, Bxz(zk)、Byz(zk) and Bzz(zk) it is respectively magnetic induction density Bx(zk), By(zk) and Bz(zk) along Z-direction
Magnetic field gradient, wherein zkFor sampling location, Bxz(zk)、Byz(zk) and Bzz(zk) be calculated by above-mentioned formula (a)；
(4) the local modulus C is calculatedZ(zk) to zkSecond dervative：
(5) reduce the movement speed of the mobile control platform, the sample frequency of the magnetic sensor remains unchanged, constantly
It repeats aforementioned (1)-(4), until the scanning range [zj- a, zj+ a] second damage position of interior appearance, record the two damages
The sequence number of position is respectively sequentially k=l, k=m, wherein l ＜ m, and record corresponding damage monitoring at this time and differentiate
Rate dres0k, then it is in [zj- a, zj+ a] within position be respectively zLAnd zM；And
(6) in Steel section member damage position zjPlace, corresponding lesion size are：
dzj=(m-l) dres0k。
8. Steel section member damage monitoring method according to claim 5, which is characterized in that by the Steel section member along length
Direction is divided into several equal portions, the mobile control platform is respectively arranged on the Steel section member of each equal portions, with right
The damage position and the lesion size in the entire Steel section member Z-direction are monitored, to complete entire institute
State the damage position and the monitoring of lesion size of Steel section member length direction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810759722.3A CN108535355B (en) | 2018-07-11 | 2018-07-11 | System and method for monitoring whole damage process of profile steel member |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810759722.3A CN108535355B (en) | 2018-07-11 | 2018-07-11 | System and method for monitoring whole damage process of profile steel member |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108535355A true CN108535355A (en) | 2018-09-14 |
| CN108535355B CN108535355B (en) | 2020-02-21 |
Family
ID=63488146
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810759722.3A Expired - Fee Related CN108535355B (en) | 2018-07-11 | 2018-07-11 | System and method for monitoring whole damage process of profile steel member |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108535355B (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109780989A (en) * | 2019-03-06 | 2019-05-21 | 西南大学 | Based on the bridge scouring monitoring system and monitoring method for becoming baseline and magnetic field gradient |
| CN110455910A (en) * | 2019-08-21 | 2019-11-15 | 西南大学 | Cable-stayed bridge cable corrosion monitoring system and monitoring method based on magnetic field gradient tensor |
| CN112816324A (en) * | 2020-12-31 | 2021-05-18 | 西南大学 | Magnetic field monitoring system for reinforcing steel bar damage under coupling action of tensile load and environmental corrosion |
| CN116698961A (en) * | 2023-06-25 | 2023-09-05 | 中建二局安装工程有限公司 | Weld joint internal damage detection method and system based on metal magnetic memory method |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008002859A (en) * | 2006-06-21 | 2008-01-10 | Kobe Univ | Non-destructive testing method of austenite stainless steel and its device |
| CN101718748A (en) * | 2009-12-15 | 2010-06-02 | 中国石油集团川庆钻探工程有限公司 | Magnetic memory method and device for diagnosing ferromagnetic component damage |
| CN102393419A (en) * | 2011-09-07 | 2012-03-28 | 北京交通大学 | Nondestructive detection method for early damage of ferromagnetic material |
| CN103018324A (en) * | 2013-01-06 | 2013-04-03 | 爱德森（厦门）电子有限公司 | Automatic electromagnetic nondestructive testing method and device for in-use steel rail |
| CN106198718A (en) * | 2016-06-30 | 2016-12-07 | 重庆交通大学 | Drag-line corrosion sites based on metal magnetic memory detection device and method |
| CN106968173A (en) * | 2017-04-28 | 2017-07-21 | 西南大学 | Main rope of suspension bridge corrosion monitoring system and method based on magnetic field |
| CN107102057A (en) * | 2017-04-28 | 2017-08-29 | 西南大学 | Cable-stayed bridge cable fatigue damage detection system and method based on magnetic field |
-
2018
- 2018-07-11 CN CN201810759722.3A patent/CN108535355B/en not_active Expired - Fee Related
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008002859A (en) * | 2006-06-21 | 2008-01-10 | Kobe Univ | Non-destructive testing method of austenite stainless steel and its device |
| CN101718748A (en) * | 2009-12-15 | 2010-06-02 | 中国石油集团川庆钻探工程有限公司 | Magnetic memory method and device for diagnosing ferromagnetic component damage |
| CN102393419A (en) * | 2011-09-07 | 2012-03-28 | 北京交通大学 | Nondestructive detection method for early damage of ferromagnetic material |
| CN103018324A (en) * | 2013-01-06 | 2013-04-03 | 爱德森（厦门）电子有限公司 | Automatic electromagnetic nondestructive testing method and device for in-use steel rail |
| CN106198718A (en) * | 2016-06-30 | 2016-12-07 | 重庆交通大学 | Drag-line corrosion sites based on metal magnetic memory detection device and method |
| CN106968173A (en) * | 2017-04-28 | 2017-07-21 | 西南大学 | Main rope of suspension bridge corrosion monitoring system and method based on magnetic field |
| CN107102057A (en) * | 2017-04-28 | 2017-08-29 | 西南大学 | Cable-stayed bridge cable fatigue damage detection system and method based on magnetic field |
Non-Patent Citations (1)
| Title |
|---|
| 王丽 等: "金属磁记忆检测的原理和应用", 《物理测试》 * |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109780989A (en) * | 2019-03-06 | 2019-05-21 | 西南大学 | Based on the bridge scouring monitoring system and monitoring method for becoming baseline and magnetic field gradient |
| CN110455910A (en) * | 2019-08-21 | 2019-11-15 | 西南大学 | Cable-stayed bridge cable corrosion monitoring system and monitoring method based on magnetic field gradient tensor |
| CN110455910B (en) * | 2019-08-21 | 2022-11-11 | 西南大学 | Cable-stayed bridge cable corrosion monitoring system and monitoring method based on magnetic field gradient tensor |
| CN112816324A (en) * | 2020-12-31 | 2021-05-18 | 西南大学 | Magnetic field monitoring system for reinforcing steel bar damage under coupling action of tensile load and environmental corrosion |
| CN112816324B (en) * | 2020-12-31 | 2022-03-01 | 西南大学 | Magnetic field monitoring system for reinforcing steel bar damage under coupling action of tensile load and environmental corrosion |
| CN116698961A (en) * | 2023-06-25 | 2023-09-05 | 中建二局安装工程有限公司 | Weld joint internal damage detection method and system based on metal magnetic memory method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108535355B (en) | 2020-02-21 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108535355A (en) | Steel section member damage overall-process monitors system and monitoring method | |
| US10001457B2 (en) | Performance curve generation for non-destructive testing sensors | |
| CN107102057B (en) | Magnetic field-based cable-stayed bridge cable fatigue damage monitoring system and method | |
| CN111208206B (en) | Composite material ultrasonic guided wave structure health monitoring method in temperature change environment | |
| CN105527338A (en) | Metal wire rope on-line monitoring method and device | |
| US11255990B2 (en) | Internal structure detection system | |
| JP6423686B2 (en) | Deterioration diagnosis support system and deterioration diagnosis support method | |
| CN111521141B (en) | Device and method for measuring three-dimensional thermal expansion displacement of pipeline | |
| Cerro et al. | An accurate localization system for nondestructive testing based on magnetic measurements in quasi-planar domain | |
| CN106970143A (en) | A kind of method that contactless double source magnetic field comprehensive detects metallic conduit defect | |
| CN106772140A (en) | Flat magnetic field scanning imaging system based on active-passive composite shielding | |
| AU2018333861A1 (en) | Method of and apparatus for inspecting a ferromagnetic object | |
| CN103713050A (en) | Method for measuring attenuation curve of seismic wave in rock by using laser receiving apparatus | |
| CN110701990A (en) | Furnace tube carburized layer thickness evaluation method and system based on magnetic field disturbance and magnetic force double detection rings | |
| CN113093289B (en) | High-resolution nondestructive testing device for metal body parameters embedded in structure | |
| CN106932162A (en) | Track dynamic stiffness method of testing and system | |
| Minardo et al. | Structural damage identification in an aluminum composite plate by Brillouin sensing | |
| CN109780989A (en) | Based on the bridge scouring monitoring system and monitoring method for becoming baseline and magnetic field gradient | |
| CN110455910B (en) | Cable-stayed bridge cable corrosion monitoring system and monitoring method based on magnetic field gradient tensor | |
| CN105572329B (en) | Concrete crack scale distance adaptive monitoring method | |
| CN106595464A (en) | Bearing play monitoring system and method | |
| Jiang et al. | Automatic detection of microcracks on the surface of special steel wire based on remanence effect | |
| Witoś et al. | NDE of mining ropes and conveyors using magnetic methods | |
| Iqbal et al. | Performance Evaluation of Low-Cost Vibration Sensors in Industrial IoT Applications | |
| CN109884187A (en) | A kind of compressed sensing based supersonic guide-wave field damage detecting method suitable for plate structure |
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 | ||
| 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: 20200221 Termination date: 20210711 |