CN207585866U - A kind of removable unloading system for being widely applicable to the calibration of multiple spot dynamic deflection - Google Patents
A kind of removable unloading system for being widely applicable to the calibration of multiple spot dynamic deflection Download PDFInfo
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- CN207585866U CN207585866U CN201721828015.2U CN201721828015U CN207585866U CN 207585866 U CN207585866 U CN 207585866U CN 201721828015 U CN201721828015 U CN 201721828015U CN 207585866 U CN207585866 U CN 207585866U
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- deflection
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- calibration
- bridge span
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Abstract
A kind of removable unloading system for being widely applicable to the calibration of multiple spot dynamic deflection belongs to multiple spot dynamic deflection calibration field.It is characterised in that it includes:Bearing, shaped steel, displacement loading device and displacement generating device；Bearing, inclination angle type sensor and receiver, inclination angle type sensor is set to be connect with inclination angle type deflection of bridge span instrument host below shaped steel；Receiver receives the signal that photo-electric deflection of bridge span instrument is sent out, and displacement generator is loaded by multiple displacement loading devices on shaped steel.This system presets multiposition dynamic deflection, real-time rendering sag curve by the variation of structural model, while can record, reappear this deflection value.Calibrating/calibration of multiple spot dynamic deflection can be realized by this system, enhances equipment magnitude confidence level.
Description
Technical field
The utility model belongs to multiple spot dynamic deflection calibration field.
Background technology
Deflection of bridge span is a very important parameter for bridge structure, it directly reflects the vertical of bridge structure
Overall stiffness is the important evidence for reflecting bridge linear change.The present common deflection metrology instrument of people have precision level,
Total powerstation, GPS, autocollimator etc., these types of measuring instrument are all multimeters, and measuring method is relatively easy, general to use
It is measured in bridge static deflection, there are time-consuming, laborious and on-line checking difficulties.Deflection of bridge span instrument is a kind of novel, occupation bridge
Deflection metrology instrument is mainly used for the measurement of bridge static state, Dynamic flexural degree, bridge final acceptance of construction, identification；Military floating bridge is hung
The special bridge machinery such as bridge；Dam, the deformation of harbour and vibration displacement monitoring or the beam of longspan structure, column, skyscraper,
The displacement measurement of deformation, the vibration of hoisting machinery, drilling platforms etc..It can be divided into inclinator, accelerometer, connection by detection method
Tube method, optical fibre displacement sensor or deformeter, optical fibre gyro, differential GPS, digital image method etc., these methods respectively have advantage and disadvantage,
Different application scenarios is suitable for according to equipment performance and design feature, is generally used, but currently for this kind equipment also
The engineering metering that a set of effective calibration method realizes equipment is not set up, this patent is analysed in depth on the basis of forefathers study
Bridge deflection measurement factor is influenced, previous failure case is summarized, with reference to many project practical experience, is obtained by validation trial
The a set of calibration method gone out is traced to the source for photo-electric deflection of bridge span instrument and inclination angle type deflection of bridge span instrument, instructs engineering construction, is protected
Demonstrate,prove measurement data accuracy.
The method that deflection of bridge span instrument generally use and geodimeter are compared at present verifies that deflection of bridge span instrument exports
The accuracy of magnitude realizes tracing to the source for deflection of bridge span instrument.
1) geodimeter generally required in detection process installation receiver, but in actual mechanical process due to by
Configuration aspects restricted part deflection of bridge span instrument directly affects measurement performance and causes finally after can not completing this work or installation
It can not realize metering.
2) deflection of bridge span instrument most at present all has the detection function of multiple spot, and geodimeter is due to measuring principle
Limitation, can not measure the multi-point measurement function of equipment, and device measuring range is limited, and measurement capability is insufficient.
Invention content
A kind of removable unloading system for being widely applicable to the calibration of multiple spot dynamic deflection is had developed based on us are analyzed above, passes through knot
Multiposition dynamic deflection, real-time rendering sag curve are preset in the variation of structure model, while can be recorded, be reappeared this deflection value.Pass through
The method can realize calibrating/calibration of multiple spot dynamic deflection, enhance equipment magnitude confidence level.
1) calibration of deflection of bridge span instrument is realized using pre-programmed curve technology；
To the shaped steel of multiple spot dynamic deflection calibrating installation at characteristic point along the height that the downward precompressed of cross-wise direction is certain, generate
Specific curves are simultaneously kept for a period of time, and deflection of bridge span instrument measures and records deflection value.
2) deflection of bridge span instrument dynamic calibration is realized using the method for displacement curve dynamic regulation；
Deflection of bridge span instrument dynamic measurement capability and time response ability are carried out using the method for displacement curve dynamic regulation
Metering, the accuracy of validation instrument output result and the stability of measurement process, it is ensured that the applicability of instrument on-line monitoring meets
Engineering monitoring requirement.
3) calibration of multiple spot dynamic deflection deflection of bridge span instrument is realized with independent Multipoint Drive mode；
It is preset using multiple spot multistage and verifies whether deflection of bridge span instrument is suitable for the metering that Longspan Bridge monitors in real time, passed through
Test simulation, emulation technology carry out comprehensive, systematic metering to deflection of bridge span instrument overall performance, it is ensured that deflection of bridge span instrument exports
As a result accuracy and integrality.
Multiple spot dynamic deflection calibrating installation mainly includes:The compositions such as bearing, shaped steel, displacement loading device, displacement generating device,
Hardware is connected as shown in Figure 1, technical solution flow chart is as shown in Figure 2.
Bearing, inclination angle type sensor and receiver, inclination angle type sensor and inclination angle type deflection of bridge span are set below shaped steel
Instrument host connects；Receiver receives the signal that photo-electric deflection of bridge span instrument is sent out, and displacement generator is loaded by multiple displacements and filled
It puts and is loaded on shaped steel；
Further, loading device passes through central processing unit reality using hydraulic driving element, electric control system, reponse system
Existing through transport control.
The mounting means of this patent is as follows：
1) leveling multiple spot dynamic deflection calibrating installation；
2) each displacement loading device is respectively placed in multiple spot dynamic deflection device designated position；
3) inclination angle type sensor and receiver are mounted on the more amount of deflection calibrating installation designated positions of multiple spot；
4) mechanical analysis is carried out to shaped steel block mold, simultaneously output driving power makes the curve after loading to setting load deflection value
It is consistent with theoretical curve, start displacement loading device, load different shift values respectively, each loading device presses preset one kind
Or a variety of curves are loaded and are kept for 2 minutes or more；
5) start tested deflection of bridge span instrument, detect and record deflection of bridge span value；
6) terminate bridge deflection measurement, unload displacement loading device.
The experiment detailed process of the removable unloading system of multiple spot dynamic deflection calibration is as follows：
Multiple spot dynamic deflection calibrating installation is placed on test platform, leveling.Each displacement loading device is placed on the examination specified
Position is tested, pre-designed displacement curve is input in the controller of multiple spot dynamic deflection calibrating installation, inputs section steel material
The trade mark, sectional dimension, length, the parameter of position of the fulcrum, by calculating driving moment, drive displacement, finally by output driving
Device exports each point shift value and drive value, force value monitoring sensor is equipped with outside simultaneous displacement loading device, displacement passes
Sensor monitors real output value in real time, and carries out real-time deviation correcting.Tested deflection of bridge span instrument measuring part mounted on multiple spot is moved and is scratched
Device designated position is spent, more than parameter is pressed and starts displacement loading device, kept for 3~5 minutes, is detected deflection of bridge span instrument detection bridge
Deflection value exports magnitude.Different curves is inputted by above step.
Multiple spot dynamic deflection calibrating installation curve of output is measured using laser interferometer and finds the calibration of multiple spot dynamic deflection
The goodness of fit of device curve of output and input curve reaches 99.98% measurement accuracy and is significantly larger than the measurement essence for being detected instrument
Degree.
Description of the drawings
Fig. 1 multiple spot dynamic deflection calibrating installations
1------ bearing 2------ inclination angle type sensor 3------ inclination angle type deflection of bridge span instrument host 4------ shaped steel
5----- photo-electric deflection of bridge span instrument 6------ receiver 7------ displacement loading device 8------ displacement generators
Fig. 2 multiple spot dynamic deflection device technique protocol procedures figures
Fig. 3 the utility model design sketch
Specific embodiment
The mounting means of this example is as follows：
1) leveling multiple spot dynamic deflection calibrating installation；
2) each displacement loading device is respectively placed in multiple spot dynamic deflection device designated position；
3) deflection of bridge span instrument measuring part is mounted on the more amount of deflection calibrating installation designated positions of multiple spot；
4) start displacement loading device, load different shift values respectively, each loading device is by preset a kind of or more
Kind curve is loaded and is kept for 2 minutes or more；
5) start tested deflection of bridge span instrument, detect and record deflection of bridge span value；
6) terminate bridge deflection measurement, unload displacement loading device.
The utility model effect
Using pre-programmed curve technology realize deflection of bridge span instrument calibration, it is ensured that deflection of bridge span instrument test result it is accurate
Property；
Deflection of bridge span instrument dynamic calibration is realized using the method for displacement curve dynamic regulation, metering deflection of bridge span instrument dynamic is surveyed
Amount ability.
The calibration of multiple spot dynamic deflection deflection of bridge span instrument is realized with Multipoint Drive mode, it is ensured that deflection of bridge span instrument is to large span
The accuracy of structure measurement result and the stability of measurement process.
1st, mechanics point is carried out to shaped steel block mold with finite element analysis software widely used, ripe in industry
Analysis by the way of integrating theory with practice, rationally sets load deflection value and exports after enough driving forces make loading
Curve is consistent with theoretical curve, and can keep a period of time.
2nd, the difference of load(ing) point, the power of energy, the good matching of the size three of load deflection are accurately to carry out in the later stage
The underlying hardware basis of metering.
3rd, loading device passes through centre using precise hydraulic driving element, electric control system, High-precision feedback system
It manages device and realizes through transport control.
Claims (2)
1. a kind of removable unloading system for being widely applicable to the calibration of multiple spot dynamic deflection, which is characterized in that including:Bearing, shaped steel, displacement
Loading device and displacement generating device；Bearing, inclination angle type sensor and receiver be set below shaped steel, inclination angle type sensor with
Inclination angle type deflection of bridge span instrument host connects；Receiver receives the signal that photo-electric deflection of bridge span instrument is sent out, and displacement generator passes through
Multiple displacement loading devices are loaded on shaped steel.
2. system according to claim 1, which is characterized in that displacement loading device is using hydraulic driving element, electric-controlled
System processed, reponse system pass through central processing unit and realize control.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721828015.2U CN207585866U (en) | 2017-12-25 | 2017-12-25 | A kind of removable unloading system for being widely applicable to the calibration of multiple spot dynamic deflection |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721828015.2U CN207585866U (en) | 2017-12-25 | 2017-12-25 | A kind of removable unloading system for being widely applicable to the calibration of multiple spot dynamic deflection |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207585866U true CN207585866U (en) | 2018-07-06 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721828015.2U Active CN207585866U (en) | 2017-12-25 | 2017-12-25 | A kind of removable unloading system for being widely applicable to the calibration of multiple spot dynamic deflection |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207585866U (en) |
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2017
- 2017-12-25 CN CN201721828015.2U patent/CN207585866U/en active Active
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