CN108534652A - A kind of anchorage structures displacement monitor and method based on inductance value variation - Google Patents

A kind of anchorage structures displacement monitor and method based on inductance value variation Download PDF

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Publication number
CN108534652A
CN108534652A CN201810426208.8A CN201810426208A CN108534652A CN 108534652 A CN108534652 A CN 108534652A CN 201810426208 A CN201810426208 A CN 201810426208A CN 108534652 A CN108534652 A CN 108534652A
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anchoring
inductance value
detection bar
displacement
inductance
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CN108534652B (en
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蓝章礼
鲍芳芳
李建明
谭立云
唐苒然
申德兴
张玉欣
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Chongqing Traffic Engineering Quality Inspection Co.,Ltd.
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Chongqing Jiaotong University
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    • GPHYSICS
    • G01MEASURING; TESTING
    • G01BMEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
    • G01B7/00Measuring arrangements characterised by the use of electric or magnetic techniques
    • G01B7/02Measuring arrangements characterised by the use of electric or magnetic techniques for measuring length, width or thickness

Abstract

The technical program provides a kind of anchorage structures displacement monitor changed based on inductance value, including being arranged in parallel in the indoor anchoring detection bar of anchor and error-detecting bar, anchoring detection bar one end is connected on anchoring face, anchoring detection bar can be moved with the deformation in anchoring face along anchoring detection bar own axes direction, the anchoring detection bar other end is equipped with magnet, error-detecting bar is connected by a fixed link with anchor room side wall close to the one end in anchoring face, the other end is equipped with inductance coil holder, inductance coil is installed on inductance coil holder, magnet is located inside inductance coil, inductance coil is connected with inductance value change monitoring device, inductance value change monitoring device is also connected with displacement monitoring computer, the inductance value calculation anchorage structures displacement that displacement monitoring computer is used to detect based on inductance value change monitoring device.Compared with prior art, the application can accurately monitor the deformation in anchoring face in anchor room in a long time, and not influenced by anchor room depth.

Description

A kind of anchorage structures displacement monitor and method based on inductance value variation
Technical field
The present invention relates to bridge safety supervision technical field more particularly to a kind of anchorage structures positions based on inductance value variation Move monitoring device and method.
Background technology
Suspension bridge is one of most common super-huge, large bridge bridge type, these large bridges are wanted all in each traffic Road, investment is huge, investment and the hat that maintenance cost is various bridge types.During operation, vehicle flowrate is very big, and load is heavy, to state People's economic construction has immeasurable significance.Safety accident once occurs for these bridges, the economic construction for country Serious consequence will be all caused with the stabilization of society.Since Analysis of Suspension Bridges ' Anchorage subjects horizontal force from main push-towing rope and vertical anti- Power is one of primary load bearing structure.Once anchorage structures destroy, bridge can be caused to ruin the serious accident that people dies, consequence can't bear Imagine.Therefore, progress safety monitoring in suspension bridge anchorage zone is very necessary, needs to be directed to suspension bridge anchorage zone, carries out monitoring and skill Art status evaluation, early warning technology and device are researched and developed.
The stress of suspension bridge anchorage zone and deformation acquisition are most important to the technology status for judging bridge.To structural stress into Row monitoring, needs to lay many foil gauges or optical fiber, intelligence sensor, cost is very high;And displacement structure is monitored, only need Laid in anchorage zone a small number of control points can inverting anchorage structures stress and degree of impairment.According to finite element modelling and reality Border is observed, and deformed region is anchorage zone in anchor room, and other positions are basically unchanged shape, therefore pass through the deformation of anchorage zone and prison of wriggling It surveys, the situation of change of bridge can be found out.In existing patent, the method for laser progress anchorage structures displacement monitoring is utilized (201210399733.8)It can twist in the presence of with the extension laser of time, cause light spot shape and position to generate and change The problem of becoming, large error is caused to monitoring result, the method for carrying out anchor structure displacement monitoring using pressure difference (201210394633.6)Deeper anchor room is not suitable for it, when pressure difference range increases, monitoring accuracy can decrease.
Therefore, the deformation in anchoring face in anchor room can accurately be monitored in a long time by how providing, and not by anchor room depth The technical solution of influence become those skilled in the art's urgent problem.
Invention content
For deficiencies of the prior art, the application problem to be solved is:It can be accurate in a long time Monitor the deformation in anchoring face in anchor room, and the technical solution not influenced by anchor room depth.
In order to solve the above-mentioned technical problem, present invention employs the following technical solutions:
A kind of anchorage structures displacement monitor based on inductance value variation, including it is arranged in parallel in the indoor anchoring detection bar of anchor And error-detecting bar, anchor the rigid detection bar that detection bar and error-detecting bar are material, length, shape all same, anchoring inspection Measuring staff one end is connected on anchoring face, and anchoring detection bar can be as the deformation in anchoring face be along anchoring detection bar own axes direction Mobile, the anchoring detection bar other end is equipped with magnet, and error-detecting bar passes through a fixed link and anchor room close to the one end in anchoring face Side wall is connected, and the other end is equipped with inductance coil holder, and inductance coil is equipped on inductance coil holder, and magnet is located at inductance Coil inside, inductance coil are connected with inductance value change monitoring device, inductance value change monitoring device also with displacement monitoring meter Calculation machine is connected, the inductance value calculation anchorage structures that displacement monitoring computer is used to detect based on inductance value change monitoring device Displacement.
Preferably, it is provided with a limit sunpender on the side wall of anchor room, limits and is provided with two cyclic structures on sunpender, anchoring detection Bar and error-detecting bar slidably pass through two cyclic structures and keeping parallelism respectively.
Preferably, inductance value change monitoring device includes sequentially connected signal deteching circuit, range control circuit, operation Amplifying circuit, A/D converter circuit and interface circuit, signal deteching circuit are connected with inductance coil, interface circuit and displacement monitoring Computer is connected.
A kind of anchorage structures displacement monitoring method based on inductance value variation, the anchorage for the inductance value variation that this method uses Displacement structure monitoring device carries out anchorage structures displacement monitoring, including is arranged in parallel in the indoor anchoring detection bar of anchor and error inspection Measuring staff, anchoring detection bar and error-detecting bar are the rigid detection bar of material, length, shape all same, anchoring detection bar one end On the anchoring face of being connected to, anchoring detection bar can be moved with the deformation in anchoring face along anchoring detection bar own axes direction, anchor Gu the detection bar other end is equipped with magnet, error-detecting bar is connected by a fixed link with anchor room side wall close to the one end in anchoring face It connects, the other end is equipped with inductance coil holder, and inductance coil is equipped on inductance coil holder, and magnet is located in inductance coil Portion, inductance coil are connected with inductance value change monitoring device, inductance value change monitoring device also with displacement monitoring computer phase Connection, the inductance value calculation anchorage structures displacement that displacement monitoring computer is used to detect based on inductance value change monitoring device Amount, when anchoring face undeformed, one end of magnet towards the one end and inductance coil towards anchoring face in anchoring face is detected along anchoring The distance in rod axis direction is X1, and inductance coil is connected with inductance value change monitoring device, and this method includes the following steps:
Displacement monitoring computer obtains current inductance value from inductance value change monitoring device;
Displacement monitoring computer uses displacement anchorage structures position corresponding with the comparison model of the inductance value current inductance value of calculating Shifting amount.
Preferably, the method for obtaining displacement and the comparison model of inductance value includes the following steps:
Before anchoring detection bar is fixedly connected with anchoring face, magnet is measured towards the one end in anchoring face and inductance coil towards anchor Gu inductance value of the one end in face when the distance along anchoring detection bar axis direction is X1;
When repeatedly moving anchoring detection bar along anchoring detection bar axis direction, and recording mobile every time magnet towards anchoring face one Hold one end with inductance coil direction anchoring face at a distance from edge anchoring detection bar axis direction and corresponding inductance value;
It is fitted operation based on the distance and corresponding inductance value repeatedly recorded and obtains displacement and the comparison model of inductance value.
In conclusion the technical program provides a kind of anchorage structures displacement monitor changed based on inductance value, packet It includes and is arranged in parallel in the indoor anchoring detection bar of anchor and error-detecting bar, anchoring detection bar one end is connected on anchoring face, is anchored Detection bar can be moved with the deformation in anchoring face along anchoring detection bar own axes direction, and the anchoring detection bar other end is equipped with Magnet, error-detecting bar are connected by a fixed link with anchor room side wall close to the one end in anchoring face, and the other end is equipped with inductance Coil brace is equipped with inductance coil on inductance coil holder, and magnet is located inside inductance coil, inductance coil and inductance quantitative change Change monitoring device to be connected, inductance value change monitoring device is also connected with displacement monitoring computer, and displacement monitoring computer is used In the inductance value calculation anchorage structures displacement detected based on inductance value change monitoring device.Compared with prior art, this Shen The deformation in anchoring face in anchor room please can be accurately monitored in a long time, and do not influenced by anchor room depth.
Description of the drawings
In order to keep the purpose, technical scheme and advantage of invention clearer, the present invention is made into one below in conjunction with attached drawing The detailed description of step, wherein:
Fig. 1 is a kind of structural schematic diagram of anchorage structures displacement monitor based on inductance value variation disclosed by the invention;
Fig. 2 is the structural schematic diagram of anchor room in the present invention.
Drawing reference numeral explanation:Anchor room 1, anchoring detection bar 2, error-detecting bar 3, anchoring face 4, fixed link 5, magnet 6, inductance Coil 7, inductance coil holder 8, inductance value change monitoring device 9, signal deteching circuit 901, range control circuit 902, operation Amplifying circuit 903, A/D converter circuit 904, interface circuit 905, displacement monitoring computer 10, limit sunpender 11.
Specific implementation mode
The present invention is described in further detail below in conjunction with the accompanying drawings.
As shown in Figure 1, this application discloses a kind of anchorage structures displacement monitor based on inductance value variation, including it is flat In the indoor anchoring detection bar of anchor and error-detecting bar, it is material, length, shape to anchor detection bar and error-detecting bar for row setting The rigid detection bar of all same, anchoring detection bar one end are connected on anchoring face, and anchoring detection bar can be with the shape in anchoring face Become and moved along anchoring detection bar own axes direction, the anchoring detection bar other end is equipped with magnet, and error-detecting bar is close to anchoring The one end in face is connected by a fixed link with anchor room side wall, and the other end is equipped with inductance coil holder, on inductance coil holder Inductance coil is installed, magnet is located inside inductance coil, and inductance coil is connected with inductance value change monitoring device, inductance value Change monitoring device is also connected with displacement monitoring computer, and displacement monitoring computer is used to be based on inductance value change monitoring device The inductance value calculation anchorage structures displacement detected.
Cylindrical cavity as shown in Figure 2 is the anchor room of anchoring installation, and the drag-line of suspension bridge is launched into multiply in anchor room, then It is dispersed in anchor room bottom to be fixed, fixed face is anchorage zone or anchoring face, under powerful pulling force is existed slow It wriggles and deforms.
Anchorage structures displacement monitor disclosed in the present application based on inductance value variation includes the material of two same materials Be fabricated to thickness, length, equiform rigid detection bar, one be anchor detection bar, one be error-detecting bar.The application Basic principle be:When anchorage zone creeping deformation under strand pulling force, anchoring detection bar moves therewith, occurs along anchor room longitudinal direction The displacement in direction can measure the misalignment of anchorage zone by the displacement detecting to anchoring detection bar distal end.But anchoring detection There is phenomenon of expanding with heat and contract with cold in bar itself, the displacement of anchoring detection bar distal end includes the displacement of anchorage zone and expanding with heat and contract with cold for itself Amount, therefore, it is necessary to remove its measurement error brought of expanding with heat and contract with cold.Error-detecting bar itself is not direct to be connect with anchorage zone, and It is to be connect with anchor room side, according to finite element modelling, anchor room side will not be subjected to displacement variation, therefore, the length of error-detecting bar Degree variation is only caused by expanding with heat and contract with cold for its own.Using feature of the anchoring detection bar as error-detecting bar, examined with anchoring The result that measuring staff obtains subtract error-detecting bar as a result, the as result of anchorage zone displacement.In this application, detection bar is anchored And the one end of error-detecting bar far from anchorage zone is respectively arranged with magnet and inductance coil, magnet is in inside inductance coil, when When anchorage zone deforms upon, the change in location for anchoring the one end of detection bar and error-detecting bar far from anchorage zone can be caused to differ It causes, coil internal magnet position is made to change, the basic principle changed according to inductance coil inductance value, it is known that magnet positions occur When variation, respective change will occur for the inductance value of coil, by detect inductance value variation and convert, can be obtained coil with The actual relative displacement of magnet, the relative displacement are equal to the displacement of anchorage zone.
The carry out anchorage structures displacement prison of anchorage structures displacement monitor used herein based on inductance value variation The method of survey includes:Displacement monitoring computer obtains current inductance value from inductance value change monitoring device;Displacement monitoring computer Use displacement anchorage structures displacement corresponding with the comparison model of the inductance value current inductance value of calculating.
Compared with prior art, the application can accurately monitor the deformation in anchoring face in anchor room to the application in a long time, And it is not influenced by anchor room depth.
When it is implemented, being provided with a limit sunpender on the side wall of anchor room, limits and be provided with two cyclic structures on sunpender, anchor Detection bar and error-detecting bar slidably pass through two cyclic structures and keeping parallelism respectively.
The application ensures that anchoring detection bar and error-detecting bar are parallel using limit sunpender, in order to make anchoring detection bar and mistake Poor detection bar is slided in cyclic structure is not obstructed, and sliding bearing can be also installed in cyclic structure to reduce frictional force.
When it is implemented, inductance value change monitoring device include sequentially connected signal deteching circuit, range control circuit, Operational amplification circuit, A/D converter circuit and interface circuit, signal deteching circuit are connected with inductance coil, interface circuit and displacement Monitoring computer is connected.
The application uses the inductance value change monitoring device of said mechanism, and manufacturing cost is low, simple in structure, reduces monitoring Operation difficulty and monitoring cost.
Disclosed herein as well is a kind of anchorage structures displacement monitoring method based on inductance value variation, the electricity that this method uses The anchorage structures displacement monitor of sensitivity changes carries out anchorage structures displacement monitoring, including is arranged in parallel in the indoor anchoring of anchor Detection bar and error-detecting bar, anchoring detection bar and error-detecting bar are the rigid detection bars of material, length, shape all same, Anchoring detection bar one end is connected on anchoring face, and anchoring detection bar can be as the deformation in anchoring face be along anchoring detection bar itself axis Line direction is moved, and the anchoring detection bar other end is equipped with magnet, and error-detecting bar passes through a fixed link close to the one end in anchoring face It is connected with anchor room side wall, the other end is equipped with inductance coil holder, and inductance coil, magnet position are equipped on inductance coil holder Inside inductance coil, inductance coil is connected with inductance value change monitoring device, inductance value change monitoring device also with displacement Monitoring computer is connected, the inductance value calculation anchor that displacement monitoring computer is used to detect based on inductance value change monitoring device Heavy stone used as an anchor displacement structure amount, when anchoring face undeformed, one end of magnet towards the one end and inductance coil towards anchoring face in anchoring face exists Distance along anchoring detection bar axis direction is X1, and inductance coil is connected with inductance value change monitoring device, and this method includes Following steps:
Displacement monitoring computer obtains current inductance value from inductance value change monitoring device;
Displacement monitoring computer uses displacement anchorage structures position corresponding with the comparison model of the inductance value current inductance value of calculating Shifting amount.
When it is implemented, the method for obtaining displacement and the comparison model of inductance value includes the following steps:
Before anchoring detection bar is fixedly connected with anchoring face, magnet is measured towards the one end in anchoring face and inductance coil towards anchor Gu inductance value of the one end in face when the distance along anchoring detection bar axis direction is X1;
When repeatedly moving anchoring detection bar along anchoring detection bar axis direction, and recording mobile every time magnet towards anchoring face one Hold one end with inductance coil direction anchoring face at a distance from edge anchoring detection bar axis direction and corresponding inductance value;
It is fitted operation based on the distance and corresponding inductance value repeatedly recorded and obtains displacement and the comparison model of inductance value.
It also needs to be demarcated to generate displacement and the comparison model of inductance value before carrying out actual monitoring, need It is noted that for the ease of operation, demarcating steps need to carry out before anchoring detection bar is fixedly connected with anchoring face, pass through survey Inductance value when different displacements occurs for amount anchoring detection bar, is fitted operation, and one displacement of formation is compareed with inductance value Model, then in actual monitoring later, it is only necessary to measure inductance value again by the comparison model of displacement and inductance value The corresponding displacement of the inductance value measured quickly is calculated, to know the displacement in anchoring face, and then understands the shape in anchoring face Become situation.During being demarcated, need to ensure the relative position of magnet and inductance coil and anchoring face when calibration starts Magnet is identical as the relative position of inductance coil when original state, therefore measures the one end of magnet towards anchoring face when calibration first Inductance value when one end with inductance coil towards anchoring face is X1 at a distance from edge anchoring detection bar axis direction.
Finally illustrate, the above examples are only used to illustrate the technical scheme of the present invention and are not limiting, although passing through ginseng According to the preferred embodiment of the present invention, invention has been described, it should be appreciated by those of ordinary skill in the art that can To make various changes to it in the form and details, without departing from of the invention defined by the appended claims Spirit and scope.

Claims (5)

1. a kind of anchorage structures displacement monitor based on inductance value variation, which is characterized in that including being arranged in parallel in anchor room Interior anchoring detection bar and error-detecting bar, it is material, the rigidity of length, shape all same to anchor detection bar and error-detecting bar Detection bar, anchoring detection bar one end are connected on anchoring face, and anchoring detection bar can be detected with the deformation in anchoring face along anchoring Bar own axes direction is moved, and the anchoring detection bar other end is equipped with magnet, and error-detecting bar passes through close to the one end in anchoring face One fixed link is connected with anchor room side wall, and the other end is equipped with inductance coil holder, and inductor wire is equipped on inductance coil holder Circle, magnet are located inside inductance coil, and inductance coil is connected with inductance value change monitoring device, inductance value change monitoring device Also it is connected with displacement monitoring computer, the inductance that displacement monitoring computer is used to detect based on inductance value change monitoring device Value calculates anchorage structures displacement.
2. the anchorage structures displacement monitor of inductance value variation as described in claim 1, which is characterized in that on the side wall of anchor room It is provided with a limit sunpender, limits and is provided with two cyclic structures on sunpender, anchors detection bar and error-detecting bar respectively slidably Pass through two cyclic structures and keeping parallelism.
3. the anchorage structures displacement monitor of inductance value variation as described in claim 1, which is characterized in that inductance value changes Monitoring device includes sequentially connected signal deteching circuit, range control circuit, operational amplification circuit, A/D converter circuit and interface Circuit, signal deteching circuit are connected with inductance coil, and interface circuit is connected with displacement monitoring computer.
4. a kind of anchorage structures displacement monitoring method based on inductance value variation, which is characterized in that the inductance value that this method uses The anchorage structures displacement monitor of variation carries out anchorage structures displacement monitoring, including is arranged in parallel in the indoor anchoring detection of anchor Bar and error-detecting bar, anchoring detection bar and error-detecting bar are the rigid detection bar of material, length, shape all same, anchoring Detection bar one end is connected on anchoring face, and anchoring detection bar can be as the deformation in anchoring face be along anchoring detection bar own axes side To movement, the anchoring detection bar other end is equipped with magnet, and error-detecting bar passes through a fixed link and anchor close to the one end in anchoring face Room side wall is connected, and the other end is equipped with inductance coil holder, and inductance coil is equipped on inductance coil holder, and magnet is located at electricity Feel coil inside, inductance coil is connected with inductance value change monitoring device, inductance value change monitoring device also with displacement monitoring Computer is connected, the inductance value calculation anchorage knot that displacement monitoring computer is used to detect based on inductance value change monitoring device Structure displacement, when anchoring face undeformed, magnet is towards the one end in anchoring face and the one end in inductance coil direction anchoring face along anchor Gu the distance of detection bar axis direction is X1, inductance coil is connected with inductance value change monitoring device, and this method includes as follows Step:
Displacement monitoring computer obtains current inductance value from inductance value change monitoring device;
Displacement monitoring computer uses displacement anchorage structures position corresponding with the comparison model of the inductance value current inductance value of calculating Shifting amount.
5. the anchorage structures displacement monitoring method as claimed in claim 4 based on inductance value variation, which is characterized in that obtain position The method of the comparison model of shifting amount and inductance value includes the following steps:
Before anchoring detection bar is fixedly connected with anchoring face, magnet is measured towards the one end in anchoring face and inductance coil towards anchor Gu inductance value of the one end in face when the distance along anchoring detection bar axis direction is X1;
When repeatedly moving anchoring detection bar along anchoring detection bar axis direction, and recording mobile every time magnet towards anchoring face one Hold one end with inductance coil direction anchoring face at a distance from edge anchoring detection bar axis direction and corresponding inductance value;
It is fitted operation based on the distance and corresponding inductance value repeatedly recorded and obtains displacement and the comparison model of inductance value.
CN201810426208.8A 2018-05-07 2018-05-07 Anchorage structure displacement monitoring device and method based on inductance change Active CN108534652B (en)

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CN110320034A (en) * 2019-08-09 2019-10-11 东北大学秦皇岛分校 A kind of linear bearing linearity measurer based on corner variation

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CN110320034A (en) * 2019-08-09 2019-10-11 东北大学秦皇岛分校 A kind of linear bearing linearity measurer based on corner variation

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