CN106500676A - Electromagnetic levitation type bridge pier top deviation measurement device and its measuring method - Google Patents
Electromagnetic levitation type bridge pier top deviation measurement device and its measuring method Download PDFInfo
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- CN106500676A CN106500676A CN201611041328.3A CN201611041328A CN106500676A CN 106500676 A CN106500676 A CN 106500676A CN 201611041328 A CN201611041328 A CN 201611041328A CN 106500676 A CN106500676 A CN 106500676A
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- levitation
- pier top
- magnetic
- bridge pier
- suspended matter
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
- G01C15/00—Surveying instruments or accessories not provided for in groups G01C1/00 - G01C13/00
Abstract
The invention discloses a kind of electromagnetic levitation type bridge pier top deviation measurement device, is mainly made up of the mounting seat of magnetic-levitation, shroud sleeve and adjustable horizontal.The device is based on magnetic suspension principle, constant vertical force is provided using magnetic-levitation for suspended matter gauge block, suspended matter gauge block is made to be suspended on track, form the fixing point in the middle of the test of pier top off normal, magnetic-levitation, shroud sleeve and base are then as bridge pier top off normal occurred level is moved, measurement suspended matter gauge block and the change of shroud sleeve relative level distance, you can obtain the off normal of bridge pier top.Apply the present invention to the test of bridge pier top off normal, external stability point need not be set, you can accurately measure the absolute off normal of bridge pier top；And the kinetic measurement of achievable pier top off normal, and it is widely used in the technical fields such as Test on Bridge Loading, health monitoring.Accordingly, inventor has also set up corresponding measuring method.
Description
Technical field
A kind of the invention belongs to horizontal off normal field of measuring technique of bridge, more particularly to electromagnetic levitation type bridge pier top off normal survey
Amount device and its measuring method.
Background technology
Work as in bridge in cross a river, the high pier bridge across mountain valley, the horizontal off normal size of pier top is reflection full-bridge stress
One important indicator.Therefore, in the loading test detection of such bridge, Construction control and bridge health monitoring, pier top off normal
All it is important measurement index, it is an important ring for understanding structural stress state and ensureing structure safety to measure off normal value
Section.
Common pier top off normal method of testing has total powerstation method, GPS methods etc..Total powerstation method needs to arrange level seat outside bridge
The constant permanent datum of mark, recycles total station survey pier top to change relative to the horizontal coordinate of permanent datum, using several
What coordinate relation calculates the horizontal off normal value of pier top；However, the measurement of total powerstation method is needed manually to point and artificial observation, precision is received
Air, environment and human factor affect.GPS methods are using GPS network network, arrange GPS in pier top, carry out coordinate to a position
Resolve the horizontal off normal for obtaining pier top；Although GPS methods can achieve automatic measurement, and need not arrange fixed reference outside bridge
Point, but horizontal accuracy is only capable of reaching 5mm ranks, cannot meet requirement of engineering, and GPS measuring instruments in the case of off normal is less
Equipment price is very high, and the unit price of 1 measuring point just reaches tens of thousands of units, and whole system needs hundreds thousand of units.For this purpose, realizing inexpensive, smart
Accurate, quick measurement bridge pier top off normal becomes very difficult, and this is also a big technical barrier of current bridge machinery engineering field.
Content of the invention
The technical problem to be solved in the present invention is to provide a kind of electromagnetic levitation type bridge pier top deviation measurement device and its measurement
Method, to realize low cost, precisely, quickly measure bridge pier top off normal, the device and method is widely used in bridge load examination
Test, the technical field such as construction monitoring, health monitoring.
For solving above-mentioned technical problem, the present invention is employed the following technical solutions：
Electromagnetic levitation type bridge pier top deviation measurement device, mainly by magnetic-levitation, shroud sleeve and adjustable horizontal
Mounting seat is constituted；Magnetic-levitation is horizontally installed in shroud sleeve, and shroud sleeve is placed on mounting seat；Magnetic suspension rail
Suspended matter gauge block is installed on road, magnetic-levitation end is provided with rangefinder, magnetic-levitation has controller and by controlling
Device is controlled to suspended matter gauge block and provides the constant suspending power for being equal to its gravity.
Magnetic-levitation is electromagnetic type straight line magnetic-levitation, and more than 10cm, maximum load is suspended load discharge to range
More than 2 times of block gravity.
Mounting seat has three foot screws and a round air level.
Controller includes suspended matter gauge block position detecting feedback system.
Rangefinder is more than 10Hz from the high precision distance detector that precision is 0.01mm levels, measurement frequency.
Using the measuring method of above-mentioned electromagnetic levitation type bridge pier top deviation measurement device, comprise the following steps：
(1) in bridge pier pier top position, electromagnetic levitation type bridge pier top deviation measurement device, magnetic-levitation direction are fixedly mounted
Parallel with bridge pier off normal direction to be tested；
(2) by adjusting mounting seat, make base upper surface in horizontality, magnetic-levitation is also at horizontal
State；
(3) controller power source is opened, by controller by suspended matter gauge block position adjustments to magnetic-levitation middle of stroke
Position, keeps suspending power to make suspended matter gauge block in static suspended state, and arranges suspending power in magnetic-levitation keeping this shape
State is constant, and suspended matter gauge block abswolute level coordinate keeps constant；
(4) now horizontal range L of the suspended matter gauge block relative to shroud sleeve end is measured1；
(5) bridge load test is carried out, and bridge pier pier top produces horizontal direction off normal d；
(6) now horizontal range L of the suspended matter gauge block relative to shroud sleeve end is measured2；
(7) it is d=Δ L=L to calculate bridge pier top off normal1-L2.
Bridge is high pier bridge.
For the problem that existing highway bridge pier top off normal measuring method is present, inventor has designed and produced a kind of electromagnetic levitation type
Bridge pier top deviation measurement device, is mainly made up of the mounting seat of magnetic-levitation, shroud sleeve and adjustable horizontal；Magnetcisuspension
Floating track is horizontally installed in shroud sleeve, and shroud sleeve is placed on mounting seat；Suspended matter is installed on magnetic-levitation
Gauge block, magnetic-levitation end are provided with rangefinder, and magnetic-levitation has controller and is controlled to suspended load discharge by controller
Block provides the constant suspending power for being equal to its gravity.The device is based on magnetic suspension principle, is suspended matter gauge block using magnetic-levitation
Constant vertical force is provided, suspended matter gauge block is suspended on track, the fixing point formed in the middle of the test of pier top off normal (is itself
Realize that the constant permanent datum of horizontal coordinate is arranged in inside), magnetic-levitation, shroud sleeve and base are then with bridge pier top
Off normal occurred level is moved, and measures the change of suspended matter gauge block and shroud sleeve relative level distance, you can obtain bridge pier top
Off normal.Apply the present invention to the test of bridge pier top off normal, external stability point need not be set, you can accurately measure bridge pier
The absolute off normal on top；And the kinetic measurement of achievable pier top off normal, and it is widely used in the skills such as Test on Bridge Loading, health monitoring
Art field.Accordingly, inventor has also set up corresponding measuring method.
Compared with prior art, outstanding advantage of the invention is characterized in particular in：
(1) by magnetic suspension principle, the constant permanent datum of horizontal coordinate is internally formed in device, without the need for such as conventional measurement
Amount method arranges fixing point beyond bridge, there are no artificial and environmental disturbances, simplifies pier top off normal test process, in height
In the middle of pier bridge, application advantage is obvious；
(2) measurement apparatus of the present invention are directly mounted at bridge pier pier top, can pass through the adjusting base regulation level for carrying, scene
It is very convenient to install and operate, and improves pier top off normal testing efficiency；
(3) present invention can achieve the displacement measurement of 0.1mm precision from high precision magnetic levitation track and rangefinder, meet
The needs of engineering, and instrument is sealed in shroud sleeve, is not disturbed by outside environmental elements.
Description of the drawings
Fig. 1 is the structural representation of electromagnetic levitation type bridge pier top deviation measurement device of the present invention.
Fig. 2 is the stress diagram of suspended matter gauge block in electromagnetic levitation type bridge pier top deviation measurement device of the present invention.
Fig. 3 is electromagnetic levitation type bridge pier top deviation measurement device use state of the present invention with reference to figure (before off normal).
Fig. 4 is electromagnetic levitation type bridge pier top deviation measurement device use state of the present invention with reference to figure (after off normal).
In figure：1 magnetic-levitation, 2 suspended matter gauge blocks, 3 controllers, 4 rangefinders, 5 shroud sleeves, 6 foot screws, 7 circle water
Quasi- bubble, 8 mounting seats.
Specific embodiment
1. basic structure
As shown in figure 1, electromagnetic levitation type bridge pier top deviation measurement device, mainly by magnetic-levitation 1,5 and of shroud sleeve
The mounting seat 8 of adjustable horizontal is constituted；Magnetic-levitation is horizontally installed in shroud sleeve, and shroud sleeve is placed in mounting seat
On；Suspended matter gauge block 2 is installed on magnetic-levitation, magnetic-levitation end is provided with rangefinder 4, and magnetic-levitation has
Controller 3 is simultaneously controlled to the constant suspending power that the offer of suspended matter gauge block is equal to its gravity by controller.
Wherein, magnetic-levitation is electromagnetic type straight line magnetic-levitation, and more than 10cm, maximum load is to suspend to range
More than 2 times of mass gravity.There is mounting seat three foot screws 6 and a round air level 7, three foot screws independently can adjust
Section, makes to justify air level between two parties, and magnetic-levitation is in horizontality.Controller includes suspended matter gauge block position detection feedback system
System, is less than 0.1N to the constant suspending power control accuracy of suspended matter gauge block, is less than 0.01mm to suspended matter gauge block position control accuracy.
From the high precision distance detector that precision is 0.01mm levels, measurement frequency is more than 10Hz to rangefinder, for measuring suspended matter gauge block
Relative distance changes.
2. operation principle
As shown in Figures 2 to 4, electromagnetic levitation type bridge pier top deviation measurement device is directly mounted at bridge pier top, controller
Control magnetic-levitation provides constant outstanding equal to mass gravity in the effective travel of magnetic-levitation for suspended matter gauge block
Buoyancy F.Now, suspended matter gauge block is only subject to the constant suspending power F two straight up that self gravitation G and magnetic-levitation are provided
The effect of individual power, when suspending power is equal with mass self gravitation all the time (F=G), mass is in a vertical equilibrium-like
State, mass are not come in contact with magnetic-levitation, and its true horizontal position will not change because of moving horizontally for magnetic-levitation
Become, form pier top off normal test permanent datum.When being fixed on the magnetic-levitation of bridge pier pier top, shroud sleeve with bridge pier
Off normal produces horizontal displacement d, and as mass is in stress balance state, mass is disengaged with track, is not subject to any
Horizontal force, the true horizontal position which suspends do not change with magnetic-levitation, simply the level phase of mass and shroud sleeve
Position is changed, the knots modification of relative position is equal with shroud sleeve horizontal direction displacement, i.e., with bridge pier pier top
Horizontal off normal equal.Go out mass and shroud sleeve before and after off normal by being installed on the stadia surveying of magnetic-levitation end
Variation delta L of relative position, you can obtain bridge pier off normal value.As before off normal, mass with the distance of shroud sleeve end is
L1, after pier top off normal, mass is L with the distance of shroud sleeve end2, then pier top off normal value be d=Δ L=L1-L2.With
When, continuously measured using dynamic rangefinder, you can realize the test of bridge pier pier top dynamic off normal.
3. operating procedure
(1) before carrying out pier top off normal test, in bridge pier pier top position, the off normal measurement of fixed installation electromagnetic levitation type bridge pier top
Device, magnetic-levitation direction are parallel with bridge pier off normal direction to be tested；
(2) by the back-out amount of regulation three foot screws of mounting seat, make the bubble that justifies in air level placed in the middle, now base
Upper surface is in horizontality, and magnetic-levitation is also at horizontality；
(3) controller power source is opened, by controller by suspended matter gauge block position adjustments to magnetic-levitation middle of stroke
Position, keeps suspending power to make suspended matter gauge block in static suspended state, and arranges suspending power in magnetic-levitation keeping this shape
State is constant, and suspended matter gauge block abswolute level coordinate keeps constant；
(4) now horizontal range L of the suspended matter gauge block relative to shroud sleeve end is measured1；
(5) bridge load test is carried out, and bridge pier pier top produces horizontal direction off normal d, and now the mounting seat of pier top drives
Shroud sleeve and magnetic-levitation water move flat d, and suspended matter gauge block is in stress balance state all the time, and absolute position is not
Move horizontally with magnetic-levitation and change, i.e., suspension abswolute level coordinate is x, y；
(6) now horizontal range L of the suspended matter gauge block relative to shroud sleeve end is measured2；
(7) it is d=Δ L=L to calculate bridge pier top off normal1-L2.
4. application example
Loading test is carried out to certain high-pier continuous girder bridges, the bridge is the high 50m of pier across mountain valley bridge.Using aforementioned magnetcisuspension
Floating bridge pier top deviation measurement device, is carried out with reference to aforesaid operations step.
Before pier top off normal test is carried out, in bridge pier top position, the off normal measurement of fixed installation electromagnetic levitation type bridge pier top
Device, magnetic-levitation direction are parallel with bridge pier off normal direction to be measured.By the back-out amount of three foot screws of adjusting base, circle is made
Bubble in air level is placed in the middle, and now base upper surface is in horizontality, and magnetic-levitation is also at horizontality.Open control
Device power supply processed, by controller by suspended matter gauge block position adjustments to magnetic-levitation middle of stroke position, keeps suspending power, makes
Suspended matter gauge block is in static suspended state, and arranges suspending power in magnetic-levitation and keep this state constant, suspended matter gauge block
Abswolute level coordinate keeps constant.Measure now horizontal range L of the suspended matter gauge block relative to shroud sleeve end1=
50.3mm；Carry out bridge load test, bridge pier pier top produces horizontal direction off normal, measurement now suspended matter gauge block relative to shielding
Horizontal range L of sleeve ends2=31.2mm, the off normal for calculating pier top at measuring point are d=Δ L=L1-L2=19.1mm.
Claims (7)
1. a kind of electromagnetic levitation type bridge pier top deviation measurement device, it is characterised in that main by magnetic-levitation, shroud sleeve and
The mounting seat composition of adjustable horizontal；The magnetic-levitation is horizontally installed in shroud sleeve, and shroud sleeve is placed in installation
On base；Suspended matter gauge block is installed on the magnetic-levitation, magnetic-levitation end is provided with rangefinder, magnetic suspension rail
Road has controller and is controlled to the constant suspending power that the offer of suspended matter gauge block is equal to its gravity by controller.
2. electromagnetic levitation type bridge pier top deviation measurement device according to claim 1, it is characterised in that：The magnetic suspension rail
Road is electromagnetic type straight line magnetic-levitation, and range is more than 10cm, more than 2 times for suspended matter gauge block gravity of maximum load.
3. electromagnetic levitation type bridge pier top deviation measurement device according to claim 1, it is characterised in that：The mounting seat
There is three foot screws and a round air level.
4. electromagnetic levitation type bridge pier top deviation measurement device according to claim 1, it is characterised in that：The controller bag
The position detecting feedback system of gauge block containing suspended matter.
5. electromagnetic levitation type bridge pier top deviation measurement device according to claim 1, it is characterised in that：The rangefinder choosing
With the high precision distance detector that precision is 0.01mm levels, measurement frequency is more than 10Hz.
6. usage right requires the measuring method of electromagnetic levitation type bridge pier top deviation measurement device described in 1, it is characterised in that include
Following steps：
(1) in bridge pier pier top position, fixedly mount electromagnetic levitation type bridge pier top deviation measurement device, magnetic-levitation direction with treat
The bridge pier off normal direction of test is parallel；
(2) by adjusting mounting seat, make base upper surface in horizontality, magnetic-levitation is also at horizontality；
(3) controller power source is opened, by controller by suspended matter gauge block position adjustments to magnetic-levitation middle of stroke position,
Keep suspending power to make suspended matter gauge block in static suspended state, and arrange suspending power in magnetic-levitation keeping this state not
Become, suspended matter gauge block abswolute level coordinate keeps constant；
(4) now horizontal range L of the suspended matter gauge block relative to shroud sleeve end is measured1；
(5) bridge load test is carried out, and bridge pier pier top produces horizontal direction off normal d；
(6) now horizontal range L of the suspended matter gauge block relative to shroud sleeve end is measured2；
(7) it is d=Δ L=L to calculate bridge pier top off normal1-L2.
7. measuring method according to claim 6, it is characterised in that：The bridge is high pier bridge.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611041328.3A CN106500676A (en) | 2016-11-23 | 2016-11-23 | Electromagnetic levitation type bridge pier top deviation measurement device and its measuring method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611041328.3A CN106500676A (en) | 2016-11-23 | 2016-11-23 | Electromagnetic levitation type bridge pier top deviation measurement device and its measuring method |
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| Publication Number | Publication Date |
|---|---|
| CN106500676A true CN106500676A (en) | 2017-03-15 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611041328.3A Pending CN106500676A (en) | 2016-11-23 | 2016-11-23 | Electromagnetic levitation type bridge pier top deviation measurement device and its measuring method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109723086A (en) * | 2019-03-05 | 2019-05-07 | 侯玮玮 | A kind of magnetic force pushing equipment of curved section steel reinforcement cage thrustor |
| CN114688959A (en) * | 2022-04-11 | 2022-07-01 | 水利部交通运输部国家能源局南京水利科学研究院 | Detection device and detection method for horizontal displacement of test structure |
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| CN206321247U (en) * | 2016-11-23 | 2017-07-11 | 广西交通科学研究院 | Electromagnetic levitation type bridge pier top deviation measurement device |
| CN206321248U (en) * | 2016-11-23 | 2017-07-11 | 广西交通科学研究院 | Electromagnetic levitation type bridge main tower tower top deviation measurement device |
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| CN104713496A (en) * | 2015-02-11 | 2015-06-17 | 四川大学 | Magnetic suspension contact pin type displacement sensor for micro-topography measurement |
| CN206321247U (en) * | 2016-11-23 | 2017-07-11 | 广西交通科学研究院 | Electromagnetic levitation type bridge pier top deviation measurement device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109723086A (en) * | 2019-03-05 | 2019-05-07 | 侯玮玮 | A kind of magnetic force pushing equipment of curved section steel reinforcement cage thrustor |
| CN114688959A (en) * | 2022-04-11 | 2022-07-01 | 水利部交通运输部国家能源局南京水利科学研究院 | Detection device and detection method for horizontal displacement of test structure |
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Application publication date: 20170315 |
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