CN106644229A - In-service cable force detecting device and method - Google Patents
In-service cable force detecting device and method Download PDFInfo
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- CN106644229A CN106644229A CN201710044953.1A CN201710044953A CN106644229A CN 106644229 A CN106644229 A CN 106644229A CN 201710044953 A CN201710044953 A CN 201710044953A CN 106644229 A CN106644229 A CN 106644229A
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- sensor
- cable
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- induction intensity
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L5/00—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes
- G01L5/04—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes for measuring tension in flexible members, e.g. ropes, cables, wires, threads, belts or bands
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- General Physics & Mathematics (AREA)
- Investigating Or Analyzing Materials By The Use Of Magnetic Means (AREA)
- Geophysics And Detection Of Objects (AREA)
Abstract
The invention belongs to the technical field of bridge cable detection, and discloses an in-service cable force detecting device. The device comprises a magnetization unit, a movement adjustment unit and a sensor detection unit, wherein the magnetization unit comprises a magnetizer shell and a magnetizer arranged in the magnetizer shell; the movement adjustment unit comprises a linear guide rail, a slide block and a micro adjustment device; the sensor detection unit comprises a sensor shell and a plurality of magnetic sensors; and an adjustment bolt is used for driving the sensor shell to move along the linear guide rail. During cable force detection, the sensor detection unit can move axially along a cable, each sensor unit measures a magnetic induction intensity value under the condition of unchangeable distance, a group of peak magnetic induction intensity values can be obtained, and the magnetic induction intensity on the surface of a steel wire in the cable can be calculated, so that the precision of cable force tested by the magnetic method is improved.
Description
Technical field
The invention belongs to bridge cable detection technique field, more particularly, to a kind of in-service cable force detection means
And method.
Background technology
How cable accurately obtains its load situation as one of key members of bridge such as cable-stayed bridge, suspension bridge, arch bridge
To ensureing that bridge security operation has important function.Method of oscillatory frequency is widely used to bridge cable as a kind of cable force measurement method
Among power measurement, however, receiving Boundary Condition Effect, there is the low deficiency of precision in method of oscillatory frequency in measurement short steeve.Magnetic survey rule
Do not affected by boundary condition, there is significant advantage in short steeve, if number of patent application 201410384380.3 is disclosed in
A kind of ferromagnetism slender member Suo Li detection methods and device, it is characterised in that for magnetic-field measurement Hall element using etc.
Spacing arranges, the device can the accurate smooth component of measurement surface magnetic induction intensity, but due to cable surface have it is uneven
Twisting stock ripple, when cable is magnetized, on its surface the magnetic induction intensity value corresponding with the change of stock ripple, the change will be formed
Can be found out by Fig. 1.Measure according to said apparatus, then easily affected by stray field between steel wire, and cannot accurately calculate
Go out Steel Wire Surface magnetic induction intensity in cable, so as to cause the inaccurate of measurement result.
The content of the invention
For the disadvantages described above or Improvement requirement of prior art, the invention provides a kind of in-service cable force detection means
And method, the magnetic induction intensity value at cable stock peak can be rapidly and effectively measured, and then the surface magnetic for obtaining cable can be calculated
Induction value, so as to improve the certainty of measurement of magnetic survey method.
For achieving the above object, according to one aspect of the present invention, there is provided a kind of in-service cable force detection means, its
It is characterised by, including magnetization unit, motor adjustment unit and sensor detector unit, wherein,
The magnetization unit includes magnetizer housing and the magnetizer that is arranged in the magnetizer housing, for by cable
Rope magnetizes；
The motor adjustment unit includes line slideway, slide block and micro-positioning regulators device, the line slideway fixed installation
In the outside of the magnetizer housing, the slide block is slidably mounted on the line slideway, and the micro-positioning regulators device includes
The adjustment bolt being threaded on the magnetizer housing；
The sensor detector unit includes sensor outer housing and multiple Magnetic Sensors, the sensor outer housing fixed installation
On the slide block, each described Magnetic Sensor is respectively protruding into the sensor outer housing, for contacting with cable and is obtained
Magnetic induction intensity on cable；
The adjustment bolt is used to promote the sensor outer housing to move along the line slideway.
Preferably, the distance of adjacent two Magnetic Sensor is the integral multiple in cable stock gap.
Preferably, compression spring is respectively arranged between the sensor housing and each described Magnetic Sensor, for
The Magnetic Sensor is set to be pressed on cable.
Preferably, the line slideway is installed with tailstock, the sensor away from one end of the magnetizer housing
Shell is located between the tailstock and the magnetizer housing, is provided between the sensor outer housing and the tailstock and is held out against bullet
Spring, for promoting the sensor outer housing that sensor outer housing is held out against when moving in adjustment bolt, and makes sensor outer housing and adjusts
Whole bolt is in close contact.
Preferably, spacer pin is separately installed with two relative side walls of the sensor outer housing, the spacer pin is stretched into
In the sensor outer housing, the sensor arranges fluted in the position corresponding to the spacer pin, and the spacer pin is stretched into
In the groove of the sensor, for accepting Magnetic Sensor and ensureing that the Magnetic Sensor can move up and down adjustment position, and
And prevent the Magnetic Sensor from coming off from the sensor outer housing.
Preferably, the Magnetic Sensor equidistantly arranges in alignment.
Preferably, the magnetization unit is symmetrically arranged with two, and the two magnetization units are connected by hinge and hasp
It is connected together, for clamping cable and cable being magnetized.
Preferably, the sensor detector unit is symmetrically arranged with two, and the two magnetization units by hinge and
Hasp connection together, is detected for clamping cable and to cable.
According to another aspect of the present invention, additionally provide one kind carries out in-service cable force inspection using the detection means
Survey method, it is characterised in that comprise the following steps：
1) Suo Li is applied to cable to be detected using boosting mechanism, Magnetic Sensor is carried out according to the order from head to tail
Numbering, obtains one group initial magnetic induction intensity value B of the n Magnetic Sensor at current location0=[b1,0,b2,0……bj,0……
bn,0], wherein bj,0For the magnetic induction intensity value that j-th Magnetic Sensor is measured in current location, and 1≤j≤n, n are more than 1
Integer；
2) it is p to arrange and adjust step-length, and the displacement of sensor detector unit is L, then the point of each Magnetic Sensor measurement
Quantity m=L/p, and counter i=1 is set；
3) this step is comprised the following steps：
3.1) adjustment bolt is turned, to allow adjustment bolt to promote sensor detector unit displacement p, n magnetic is obtained and is passed
One group magnetic induction intensity value B of the sensor at current locationi=[b1,i,b2,i,b3,i……bj,i……bn,i], wherein bj,iFor
The magnetic induction intensity value that j Magnetic Sensor is measured in current location；
3.2) judge whether i >=m sets up, if so, then enter step 4), if it is not, then arranging i=i+1, and return to step
3.1)；
4) one group of magnetic induction intensity value measured by each Magnetic Sensor is ranked up, takes maximum and pass as the magnetic
The magnetic induction intensity optimal value that sensor is measured, thus obtains the magnetic induction intensity optimal value of each Magnetic Sensor, so as to be gone out
The magnetic induction intensity value on cable surface, and then obtain the rope force value of cable.
Preferably, step 2) in regulating bolt promote the movement of sensor detector unit apart from the μ of μ ＜ L ＜ 2, wherein μ is cable
Strand gap.
In general, by the contemplated above technical scheme of the present invention compared with prior art, can obtain down and show
Beneficial effect：
The present invention when carrying out in-service cable force and detecting, because sensor detector unit can be moved axially along cable, from
And cause each sensing unit under conditions of keeping spacing constant, one group of magnetic induction intensity value is measured, it is hereby achieved that
Magnetic induction intensity value at one group of stock peak, so can by being calculated cable in Steel Wire Surface magnetic induction intensity, so as to improve
The precision of method of magnetic measuring rope power.
Description of the drawings
Fig. 1 is cable surface radial direction stray field emulation distribution map；
Fig. 2 is cable surface stock peak and stock gap schematic diagram；
Fig. 3 is the front view of the present invention；
Fig. 4 is the top view of the present invention；
Fig. 5 is the schematic diagram that regulating bolt is arranged between magnetization unit and sensor detector unit；
Fig. 6 is magnetization unit vertical section structure schematic diagram in the present invention；
Fig. 7 is sensor detector unit vertical section structure schematic diagram in the present invention；
Fig. 8 is magnetization unit left view schematic diagram in the present invention.
Specific embodiment
In order that the objects, technical solutions and advantages of the present invention become more apparent, it is right below in conjunction with drawings and Examples
The present invention is further elaborated.It should be appreciated that specific embodiment described herein is only to explain the present invention, and
It is not used in the restriction present invention.As long as additionally, technical characteristic involved in invention described below each embodiment
Not constituting conflict each other just can be mutually combined.
With reference to Fig. 1～Fig. 8, a kind of in-service cable force detection means, including magnetization unit, motor adjustment unit and sensing
Device detector unit, wherein,
The magnetization unit includes magnetizer housing and the magnetizer that is arranged in the magnetizer housing, for by cable
Rope 17 magnetizes；
The motor adjustment unit includes line slideway 3, slide block 4 and micro-positioning regulators device, and the line slideway 3 fixes peace
The outside of the magnetizer housing is mounted in, the slide block 4 is slidably mounted on the line slideway 3, the micro-positioning regulators device
Including the adjustment bolt 10 being threaded on the magnetizer housing；
The sensor detector unit includes sensor outer housing 7 and multiple Magnetic Sensors 6, and the sensor outer housing 7 is fixed
On the slide block 4, each described Magnetic Sensor 6 is respectively protruding into the sensor outer housing 7, for connecing with cable 17
Touch and obtain the magnetic induction intensity on cable 17；；
The adjustment bolt 10 is used to promote the sensor outer housing 7 to move along the line slideway 3.
Further, the distance of adjacent two Magnetic Sensor 6 is the integral multiple in the stock gap of cable 17.
Further, be respectively arranged with compression spring 23 between the sensor housing and each described Magnetic Sensor 6, with
It is pressed on cable 17 in the Magnetic Sensor 6 is made.
Further, the line slideway 3 is installed with tailstock 9, the sensing away from one end of the magnetizer housing
Device shell 7 is located between the tailstock 9 and the magnetizer housing, is provided between the sensor outer housing 7 and the tailstock 9
Spring 8 is held out against, for promoting the sensor outer housing 7 to hold out against sensor outer housing 7 and make sensing when moving in adjustment bolt 10
Device shell 7 is in close contact with adjustment bolt 10.
Further, spacer pin 16, the spacer pin 16 are separately installed with two relative side walls of the sensor outer housing 7
Stretch into the sensor outer housing 7, the sensor arranges fluted in the position corresponding to the spacer pin 16, described spacing
Pin 16 is stretched into the groove of the sensor, for accepting Magnetic Sensor 6 and ensureing that the Magnetic Sensor 6 can move up and down tune
Whole position, and prevent the Magnetic Sensor 6 from coming off from the sensor outer housing 7.
Further, described Magnetic Sensor 6 equidistantly arranges in alignment.
Further, the magnetization unit is symmetrically arranged with two, and the two magnetization units are by hinge and hasp 24
Link together, for clamping cable 17 and cable 17 being magnetized.
Further, the sensor detector unit is symmetrically arranged with two, and the two magnetization units by hinge and
Hasp 24 links together, for clamping cable 17 and cable 17 being detected.
The magnetization unit has magnetizer, magnetic box 14, magnetizer shell 1 and U-shaped handle 11, preferably, magnetic
Change device is accepted an armature 12 and is constituted by two magnet 13, and with cable 17 closed magnetic circuit is formed, full beneficial to cable 17 is magnetized into
With.Armature 12 is connected by the first screw 20 and magnetic box 14, and magnet 13 is packaged in inside magnetic box 14；U-shaped handle 11 leads to
Cross the second screw 21 to be arranged on magnetizer shell 1, and the second screw 21 screws in armature 12 so that outside armature 12 and magnetizer
Shell 1 is connected.Magnetizer shell 1 and magnetic box 14 are collectively forming magnetizer housing, and both work in coordination to form the sky of a closing
Between, can both increase the aesthetic property of device, can also effectively prevent the corrosion of the damage and external environment of magnetizer to magnetizer.
Sensor of the invention detector unit has sensor outer housing 7 and Magnetic Sensor 6, and sensor outer housing 7 is logical with probe
Crossing Positioning screw 22 carries out floating connection, i.e., be provided with square groove on Magnetic Sensor 6, and on sensor outer housing 7 screwed hole is provided with, and makes
Magnetic Sensor 6 can carry out under the positioning action of Positioning screw 22 it is a range of fluctuate, the upper end of Magnetic Sensor 6
By placing compression spring 23 in four grooves so as to the table of cable 7 can be close under the effect of the pressure of sensor outer housing 7
Face, so as in measurement process, Magnetic Sensor 6 keeps contacting all the time with the surface of cable 7；
Motor adjustment unit includes being fixed on the line slideway 3 of magnetization unit, and magnetization unit and sensor detection list
Inching gear between unit, inching gear adopts adjustment bolt 10, adjustment bolt 10 to be screwed into and through being fixed on magnetizer shell 1
On first baffle 19, its afterbody contacts with the second baffle 18 being fixed on sensor outer housing 7, and second baffle 18 passes through the 3rd
Screw 25 is arranged on sensor outer housing 7, and the second baffle on sensor outer housing 7 can be promoted by regulation adjustment bolt 10
18；Sensor outer housing 7 is connected by connecting plate 5 with slide block 4, so as to drive sensor inspection under the stressing conditions of second baffle 18
Survey unit to move along line slideway 3 by slide block 4.
The part of tailstock 9 is connected as an entirety with magnetizer so that sensor unit can be moved along line slideway 3,
It is longer in view of this detection means axial length, the lifting on certain space is all needed during installing and uninstalling, therefore divide
U-shaped handle 11 and T-shaped handle 15 are not designed with magnetizer and tailstock 9, in order to install and uninstall.Wherein T-shaped handle 15
It is connected by the shell upper end of screw and the part of tailstock 9.
It is specific to install as follows with detecting step:
1) magnetization unit is installed, magnet 13 and armature 12 is loaded into magnetic box 14, magnetic box is connected by the first screw 20
14 and armature 12, the second screw 21 is connected on U-shaped handle 11, magnetizer shell 1, and screws in inside armature 12；In the same manner, can install
Symmetrical the latter half magnetization unit；
2) install sensor detector unit, Magnetic Sensor is installed on probe, and Magnetic Sensor selects giant magneto-resistance sensor.
The Magnetic Sensor 6 that compression spring 23 is placed with the groove of upper end is installed to inside sensor outer housing 7, by the positioning spiral shell of both sides
22 pairs of Magnetic Sensors 6 of nail are positioned, and the probe of desirable number, sensor lower half are according to said method installed in sensor outer housing 7
Part can install in the same manner；
3) cable 17 adopts 2 meters of steel strand wires in this example, it is preferred that magnetization unit and sensor detector unit are adopted respectively
With the mode of magnetization symmetrical above and below and differential type array probe, by magnetizer and sensor along the arrangement symmetrical above and below of cable 17, and adopt
With hinge 22 magnetization unit and sensor detector unit are attached with hasp 24.
4) motor adjustment unit is installed, line slideway 3 is solid with magnetizer shell 1 and tailstock 9 respectively by installation bolt 2
Even, sensor outer housing 7 is connected by connecting plate 5 with slide block 4, and sensor outer housing 7 is with connecting plate 5 and slide block 4 with connecting plate 5 all
It is connected by bolt.First baffle 19 and second baffle 18 are solid with magnetizer shell 1 and sensor outer housing 7 respectively by bolt
Even, due to being provided with screwed hole in the middle of the first plate washer, adjusting screw screws in the first plate washer, and its afterbody is contacted with second baffle 18, is
Ensure the accuracy of adjusting screw positioning, between tailstock 9 and sensor outer housing 7 design and installationHold out against spring 8,
To ensure that the afterbody of adjusting screw is in close contact all the time with second baffle 18.
5) determine above step complete it is errorless after, Suo Li is applied to cable to be detected using boosting mechanism, according to from head
Order to tail is numbered to Magnetic Sensor, obtains one group magnetic induction intensity value of the n Magnetic Sensor at current location, note
For initial magnetic induction intensity value B0=[b1,0,b2,0,b3,0……bj,0……bn,0], for example n=12, then j=1,2 ..., 12
6) the cable Magnetic fluxleakage distribution figure according to Fig. 1, takes step-length for 1mm, its with stock peak at magnetic induction intensity value
Maximum deviation is less than 1Gs, negligible, additionally, due to cable stock gap μ=35.6mm, can arrange sensor detector unit
Displacement is L=40mm, then quantity m=L/p=40 of each Magnetic Sensor measurement point, and arranges counter i=1；
7) this step is comprised the following steps：
7.1) adjustment bolt is turned, to allow adjustment bolt to promote sensor detector unit displacement p, n magnetic is obtained and is passed
One group magnetic induction intensity value B of the sensor at current locationi=[b1,i,b2,i,b3,i……bj,i……bn,i], wherein bj,iFor
The magnetic induction intensity value that j Magnetic Sensor is measured in current location；
7.2) judge whether i >=m sets up, if so, then enter step 8), if it is not, then arranging i=i+1, and return to step
7.1)；
8) one group of magnetic induction intensity value measured by each Magnetic Sensor is ranked up, takes maximum and pass as the magnetic
The magnetic induction intensity optimal value that sensor is measured, thus obtains the optimum near surface magnetic induction intensity value of n Magnetic Sensor, so as to can
The magnetic induction intensity value on the surface of cable 17 is extrapolated, and then cable 17 can be obtained according to the method for patent 201410384380.3
Rope force value.
As it will be easily appreciated by one skilled in the art that the foregoing is only presently preferred embodiments of the present invention, not to
The present invention, all any modification, equivalent and improvement made within the spirit and principles in the present invention etc. are limited, all should be included
Within protection scope of the present invention.
Claims (10)
1. a kind of in-service cable force detection means, it is characterised in that including the inspection of magnetization unit, motor adjustment unit and sensor
Unit is surveyed, wherein,
The magnetization unit includes magnetizer housing and the magnetizer that is arranged in the magnetizer housing, for by cable magnetic
Change；
The motor adjustment unit includes line slideway, slide block and micro-positioning regulators device, and the line slideway is fixedly mounted on institute
The outside of magnetizer housing is stated, the slide block is slidably mounted on the line slideway, the micro-positioning regulators device includes screw thread
The adjustment bolt being connected on the magnetizer housing；
The sensor detector unit includes sensor outer housing and multiple Magnetic Sensors, and the sensor outer housing is fixedly mounted on institute
State on slide block, each described Magnetic Sensor is respectively protruding into the sensor outer housing, for contacting with cable and obtain cable
On magnetic induction intensity；
The adjustment bolt is used to promote the sensor outer housing to move along the line slideway.
2. a kind of in-service cable force detection means according to claim 1, it is characterised in that adjacent two Magnetic Sensor
Distance is the integral multiple in cable stock gap.
3. a kind of in-service cable force detection means according to claim 1, it is characterised in that the sensor housing with
Compression spring is respectively arranged between each described Magnetic Sensor, for making the Magnetic Sensor be pressed on cable.
4. a kind of in-service cable force detection means according to claim 1, it is characterised in that the line slideway away from
One end of the magnetizer housing is installed with tailstock, and the sensor outer housing is located at the tailstock and the magnetizer housing
Between, it is provided between the sensor outer housing and the tailstock and holds out against spring, for promotes the sensing in adjustment bolt
Device shell holds out against sensor outer housing when moving, and sensor outer housing is in close contact with adjustment bolt.
5. a kind of in-service cable force detection means according to claim 1, it is characterised in that the sensor outer housing phase
To two side walls on be separately installed with spacer pin, the spacer pin is stretched into the sensor outer housing, and the sensor is right
The position of spacer pin described in Ying Yu arranges fluted, and the spacer pin is stretched into the groove of the sensor, for accepting magnetic
Sensor and ensure that the Magnetic Sensor can move up and down adjustment position, and prevent the Magnetic Sensor from outside the sensor
Come off in shell.
6. a kind of in-service cable force detection means according to claim 1, it is characterised in that between described Magnetic Sensor etc.
It is in alignment away from arranging.
7. a kind of in-service cable force detection means according to claim 1, it is characterised in that the magnetization unit is symmetrical
Two are provided with, and the two magnetization units pass through hinge together with hasp connection, for clamping cable and to cable
Magnetized.
8. a kind of in-service cable force detection means according to claim 1, it is characterised in that the sensor detection is single
Unit is symmetrically arranged with two, and the two magnetization units by hinge together with hasp connection, for clamp cable and
Cable is detected.
9. a kind of to carry out in-service cable force detection method using arbitrary detection means in claim 1～8, its feature exists
In comprising the following steps：
1) Suo Li is applied to cable to be detected using boosting mechanism, Magnetic Sensor is compiled according to the order from head to tail
Number, obtain one group initial magnetic induction intensity value B of the n Magnetic Sensor at current location0=[b1,0,b2,0……bj,0……
bn,0], wherein bj,0For the magnetic induction intensity value that j-th Magnetic Sensor is measured in current location, and 1≤j≤n, n are more than 1
Integer；
2) it is p to arrange and adjust step-length, and the displacement of sensor detector unit is L, then the number of the point of each Magnetic Sensor measurement
Amount m=L/p, and counter i=1 is set；
3) this step is comprised the following steps：
3.1) adjustment bolt is turned, to allow adjustment bolt to promote sensor detector unit displacement p, n Magnetic Sensor is obtained
One group of magnetic induction intensity value B at current locationi=[b1,i,b2,i,b3,i……bj,i……bn,i], wherein bj,iFor j-th
The magnetic induction intensity value that Magnetic Sensor is measured in current location；
3.2) judge whether i >=m sets up, if so, then enter step 4), if it is not, then arranging i=i+1, and return to step
3.1)；
4) one group of magnetic induction intensity value measured by each Magnetic Sensor is ranked up, and takes this group of magnetic induction intensity value
The magnetic induction intensity optimal value that maximum is measured as the Magnetic Sensor, thus obtains the magnetic induction intensity of each Magnetic Sensor most
The figure of merit, so as to obtain out the magnetic induction intensity value on cable surface, and then obtains the rope force value of cable.
10. detection method according to claim 9, it is characterised in that step 2) in regulating bolt promote sensor detection
Unit movement apart from the μ of μ ＜ L ＜ 2, wherein μ is cable stock gap.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710044953.1A CN106644229B (en) | 2017-01-20 | 2017-01-20 | In-service cable force detection device and method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710044953.1A CN106644229B (en) | 2017-01-20 | 2017-01-20 | In-service cable force detection device and method |
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| Publication Number | Publication Date |
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| CN106644229A true CN106644229A (en) | 2017-05-10 |
| CN106644229B CN106644229B (en) | 2022-09-20 |
Family
ID=58842241
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| CN201710044953.1A Active CN106644229B (en) | 2017-01-20 | 2017-01-20 | In-service cable force detection device and method |
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| Country | Link |
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| CN109100071A (en) * | 2018-08-24 | 2018-12-28 | 华中科技大学 | Parallel wire stay cable force detecting device |
| CN109990925A (en) * | 2019-05-07 | 2019-07-09 | 四川睿铁科技有限责任公司 | A kind of integral structure of bridge cable magnetic stress sensor |
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| CN109100071A (en) * | 2018-08-24 | 2018-12-28 | 华中科技大学 | Parallel wire stay cable force detecting device |
| CN109100071B (en) * | 2018-08-24 | 2023-12-19 | 华中科技大学 | Parallel steel wire inhaul cable force detection device |
| CN109990925A (en) * | 2019-05-07 | 2019-07-09 | 四川睿铁科技有限责任公司 | A kind of integral structure of bridge cable magnetic stress sensor |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106644229B (en) | 2022-09-20 |
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