CN109100098A - A kind of opposed type deflection of bridge span remote supervision system and monitoring method - Google Patents
A kind of opposed type deflection of bridge span remote supervision system and monitoring method Download PDFInfo
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- CN109100098A CN109100098A CN201810819867.8A CN201810819867A CN109100098A CN 109100098 A CN109100098 A CN 109100098A CN 201810819867 A CN201810819867 A CN 201810819867A CN 109100098 A CN109100098 A CN 109100098A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M5/00—Investigating the elasticity of structures, e.g. deflection of bridges or air-craft wings
- G01M5/0008—Investigating the elasticity of structures, e.g. deflection of bridges or air-craft wings of bridges
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B5/00—Measuring arrangements characterised by the use of mechanical techniques
- G01B5/30—Measuring arrangements characterised by the use of mechanical techniques for measuring the deformation in a solid, e.g. mechanical strain gauge
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Abstract
A kind of opposed type deflection of bridge span remote supervision system, including liquid reserve tank, communicating pipe, double base points scaling module, deflection metrology submodule, data/address bus, synchronous data sampling device, industrial personal computer and remote communication module, liquid reserve tank and double base points scaling module are mounted on the vertical section of communicating pipe, and the horizontal segment of communicating pipe is connected to each deflection metrology submodule；Deflection metrology submodule includes shut-off valve, the first liquid storage pipe, the second liquid storage pipe, first pressure sensor and second pressure sensor, first liquid storage pipe and the second liquid storage pipe are separately mounted to shut-off valve both ends, horizontal symmetrical setting, and the second liquid storage pipe is connect by being connected to interface tube with communicating pipe horizontal segment；First pressure sensor and second pressure sensor is respectively set in first liquid storage pipe and the second liquid storage pipe outer end.The present invention is avoided by the pressure value of the corresponding pressure sensor of two opposed liquid storage pipes of measurement because influence of the liquid vibration to measurement data in connecting tube, realizes the precise measurement of dynamic deflection.
Description
Technical field
The present invention relates to monitoring technical field more particularly to a kind of deflection of bridge span remote supervision system and monitoring methods.
Background technique
Deflection of bridge span is the important parameter for measuring bridge life and health status.At present, in the deflection monitoring side of bridge
Face, domestic and foreign scholars have done numerous studies, and main monitoring method has following several:
(1) level method:
Usually manually using the amount of deflection of the apparatus measures bridges such as theodolite, dial gauge, but such methods are difficult to accurately reflect
The safe condition of bridge under dynamic load effect caused by vehicle pass-through, is unable to satisfy the needs of Long-term Deflection automatic monitoring.
Dynamic measurement is that real-time, on-line monitoring is carried out to deflection of bridge span, can accurately reflect bridge real-time deformation state, can find in time
The accident tendency of bridge structure avoids disastrous accident from guaranteeing bridge operation safety.
(2) based on the deflection metrology method of inclination angle mode:
This method is mainly to pass through the inclination angle of the sensor acquisition bridge main beam at measurement inclination angle, then passes through corresponding function meter
It calculates, estimates the amount of deflection of bridge indirectly.This method is bridge floor operation, need to suspend traffic, need human assistance, can only measure static state
Amount of deflection is linear, it is impossible to be used in long term monitoring.
(3) laser alignment photoresist process:
This method with a branch of collimation laser directive bridge by the low speed photographic negative in side point, it is photosensitive when load passes through
Egative film relative laser Shu Zhendong leaves the trace of bridge vibration on egative film, measures trace on egative film, bridge dynamic bit can be obtained
It moves.This method is easy to operate, but due to the diversity of light, when hypertelorism, hot spot is larger, and error is larger.And vulnerable to vibration
Dynamic interference.
(4) the deflection metrology method based on GPS:
This method is mounted on a receiver on fixed point (the forced centering point on such as bank), and another rack is located at
The biggish point (generally span centre) of bridge deformation, two receiver simultaneous observations and the signal for receiving 4 and the above satellite, pass through
The position that deformation point relative datum point is calculated in specific software systems obtains the deflection value of beam.The functional relation mistake of GPS method
In complexity, error source is more, and positioning result is by satellite clock clock deviation, receiver clock clock deviation, ionosphere delay and Multipath Errors
It is larger Deng interfering, it is not very practical.
(5) robot measurement deflection metrology method:
This method installs cooperative target on bridge first --- and then prism is obtained respectively after load using robot measurement and is closed
Make the geological information of target, finally calculates corresponding shift value.This method is at high cost, complicated for operation, is not suitable for conventional use.
(6) the deflection metrology method based on microwave interference:
One microwave interferometer is placed on constant form point by this method, when bridge deflection deformation, the microwave of microwave interferometer sending
It reflects through measuring point, is measured by recognizing the phase difference of back wave come the deflection displacement variation to tested point；For super
For the dynamic deflection measurement of large span flexible structure bridge (such as cable-stayed bridge, suspension bridge), because beam body laterally and longitudinally can all be sent out
Raw apparent geometry deformation, and the one-dimensional measurement characteristic that microwave interferometer is intrinsic, if can not be eliminated flat only with separate unit radar
Face is displaced the influence to deflection metrology.
(7) the deflection metrology method based on communicating pipe:
This method utilizes law of connected vessels, installs communicating pipe by design requirement on bridge, keeps communicating pipe and each detection
Pressure sensor, datum mark at point all keep connection, load onto anti-icing fluid in entire communicating pipe, when bridge deflection deformation,
Liquid level at measuring point changes obtains amount of deflection by sensor acquisition liquid level variation indirectly.Can also it draw when due to bridge vibration
Liquid vibration shock transducer in communicating pipe is played, current measurement accuracy is difficult to ensure under this DYNAMIC COMPLEX environment.
In conclusion there are many shortcomings for existing deflection metrology technology, a kind of new deflection metrology method is proposed
There is very big realistic meaning with dedicated unit.
Summary of the invention
The technical problem to be solved by the present invention is to overcome, the defect of prior art, to provide a kind of opposed type deflection of bridge span remote
Journey supervises examining system and monitoring method, and the method acquires multipoint pressure by being mounted on the deflection metrology submodule of bridge lower surface
Value, to obtain the real-time deflection value of each measuring point of bridge；The monitoring system detection accuracy is high, and structure is simple, system operation at
This is low.
Problem of the present invention is solved with following technical proposals:
A kind of opposed type deflection of bridge span remote supervision system, including liquid reserve tank, communicating pipe, double base points scaling module, deflection metrology
Submodule, data/address bus, synchronous data sampling device, industrial personal computer and remote communication module, the liquid reserve tank and double base points calibrate mould
Block is fixedly mounted on bridge pier, and deflection metrology submodule is provided with i, and the number of i 1-N, N is by the survey that needs when in-site installation
Point quantity determines that deflection metrology submodule block gap is uniformly mounted on bridge floor, the lower surface of bridge or bridge box house, is connected to
Pipe includes that interconnected vertical section and horizontal segment, the liquid reserve tank and double base points scaling module are mounted on the vertical of communicating pipe
Section, the horizontal segment of communicating pipe are connected to each deflection metrology submodule；The double base points scaling module, deflection metrology submodule,
Synchronous data sampling device, industrial personal computer and remote communication module are sequentially connected by data/address bus；
The deflection metrology submodule includes internal measurement device, and the internal measurement device is equipped with gross pressure measurement module, institute
Stating gross pressure measurement module includes the second liquid storage pipe and second pressure sensor, and second liquid storage pipe is equipped with by its middle part
Connection interface tube is connected to the communicating pipe horizontal segment；Second pressure sensor is arranged in the second liquid storage pipe, for detecting the
Fluid pressure in two liquid storage pipes.
Above-mentioned opposed type deflection of bridge span remote supervision system adds stress measurement module, the stress measurement
Module is identical with gross pressure measurement module structure, between the two together by shut-off valve connection；The stress measurement mould
Block includes the first liquid storage pipe and first pressure sensor, the first liquid storage pipe and the second liquid storage pipe be separately mounted to shut-off valve both ends,
Horizontal symmetrical setting, the size of the first liquid storage pipe and the second liquid storage pipe, shape and structure are all the same, and the first liquid storage pipe is located at a left side
End, the second liquid storage pipe are located at right end；When the shut-off valve is closed, first liquid storage pipe is closed chamber, second liquid storage pipe
For connection chamber；First pressure sensor is arranged in the left end of first liquid storage pipe, and first pressure sensor is for detecting the first storage
The fluid pressure of liquid pipe.
Above-mentioned opposed type deflection of bridge span remote supervision system, the double base points scaling module include upper pressure sensor and
The signal end of low pressure sensor, upper pressure sensor and low pressure sensor by data/address bus and data synchronize adopt
Storage communication, vertical distance between upper pressure sensor and low pressure sensor is L, and vertically distance L is selected as institute
The 1/2 of the range ability of upper pressure sensor and low pressure sensor is stated, to guarantee the good linearity.
The liquid reserve tank height of above-mentioned opposed type deflection of bridge span remote supervision system, communicating pipe vertical section top is higher than water
Flat section 20-40cm, horizontal segment extending direction is identical as bridge length direction, and end is provided with first row air valve；Described first
It is provided with second row air valve in the middle part of liquid storage pipe, for detecting in first liquid storage pipe full of anti-icing fluid.
Above-mentioned opposed type deflection of bridge span remote supervision system, the connection interface tube are that variable diameter is connected to interface tube, the upper end
Internal diameter is big, and bottom diameter is small；The small inner radius of communicating pipe lower end of interface is equipped with damping membrane, the connection interface tube with it is described
The distance of second pressure sensor is 1cm.
Above-mentioned opposed type deflection of bridge span remote supervision system, the deflection metrology submodule further includes seal closure, described close
Sealing cover both ends are respectively arranged with air pipe interface, are connected to by tracheae with liquid reserve tank and other each deflection metrology submodules.
Above-mentioned opposed type deflection of bridge span remote supervision system, the liquid reserve tank is closed, and upper part is provided with stomata, the gas
Hole is connect by tracheae with each deflection metrology submodule.
Above-mentioned opposed type deflection of bridge span remote supervision system, first liquid storage pipe and the second liquid storage pipe are hollow inner wall
Smooth aluminium-alloy pipe, the first pressure sensor and second pressure sensor pass through fastening screw respectively and are fixedly mounted on institute
The first liquid storage pipe and the second liquid storage pipe outer end are stated, between the first pressure sensor and the first liquid storage pipe and second pressure passes
Fixing gasket is provided between sensor and the second liquid storage pipe.
A method of realizing that deflection of bridge span remotely monitors using above-mentioned opposed type deflection of bridge span remote supervision system, including
Following steps:
S1, the monitoring system is set on bridge, opens shut-off valve, closes all second row air valves, open the first row
Air valve closes the first row air valve until anti-icing fluid is flowed out from the first row air valve；According to apart from the liquid reserve tank by remote
And close sequence, the second row air valve is successively opened, until anti-icing fluid flows out, closes shut-off valve, first liquid storage pipe is in
Air-tight state, the second liquid storage pipe are in connection state, and system enters working condition；
S2, monitoring center remotely send Monitoring instruction, send industrial personal computer to by remote communication module, it is same that industrial personal computer controls data
Walk the pressure value of pressure sensor in collector acquisition double base points scaling module and deflection metrology submodule, double base points scaling module
In pressure sensor be divided into upper pressure sensor and low pressure sensor, the design of pressure of upper pressure sensor is
p1t, the design of pressure of low pressure sensor is p2t, the pressure value of any pressure sensor in deflection metrology submodule sets
It is set to pi, pi=ρ ghi (i=1,2,3 ... n), wherein ρ is anti-icing fluid density, and g is the acceleration of gravity at measuring point；
S3, liquid level change pressure in i-th of measuring point deflection metrology submodule of t moment is calculated, sets pitFor i-th of measuring point of t moment
Because of liquid level change pressure caused by bridge flexure, the pressure data packet of the second pressure sensor measurement in deflection metrology submodule
Liquid level change pressure caused by bending containing bridge and vehicle pass through bridge and bridge vibration are caused to make anti-icing fluid vibration to second pressure
Surge two parts that sensor generates, are denoted as p 'it；The pressure of first pressure sensor measurement in deflection metrology submodule
Power, which only includes vehicle, causes bridge vibration by bridge, and then anti-icing fluid vibration is made to generate percussive pressure to first pressure sensor
Power is denoted as p "it；
S4, the pressure value p " that the first pressure sensor is measuredit, (i=3,4,5 ... envelope method processing n) is carried out, is gone
Except the trend term being then gradually reduced is increased suddenly due to closing pressure caused by shut-off valve, obtains revised each amount of deflection and survey
The pressure data of first pressure sensor, is denoted as p in quantum module1〃it, due to the size of the first liquid storage pipe and the second liquid storage pipe,
Shape and structure are all the same, therefore the signal p of caused pressure change only because deflection of bridge span changesit=p 'it - p1
〃it, (i=3,4,5...n)；
S5, difference in height of i-th of the measuring point of t moment apart from liquid reserve tank liquid level is calculated, is set as hi t,；
S6, the deflection of bridge span value for calculating i-th of measuring point of t moment, in double base points scaling module (3) setting upper pressure sensor and
Low pressure sensor, the vertical distance between upper pressure sensor and low pressure sensor are L, the setting of deflection of bridge span value
For Δ hit,。
Above-mentioned opposed type deflection of bridge span remote monitoring method, in the step S4, envelope method processing includes the following steps:
A, p is found out "itDiscrete pressure data all Local Extremums, obtain maximum and minimum value sequence；
B, segmentation cubic spline difference is carried out to maximum and minimum value sequence respectively to be fitted to obtain coenvelope value and lower envelope value；
C, the mean value of upper and lower envelope is calculated；
D, the discrete pressure data obtained in step a subtract the mean value of corresponding upper and lower envelope, obtain revised each
The pressure data p of first pressure sensor in deflection metrology submodule1〃it。
The present invention monitors system by using communicating pipe connection liquid reserve tank, double base points scaling module and deflection metrology submodule
Block, and pass through the corresponding pressure sensor that synchronous data sampling device acquires double base points scaling module and deflection metrology submodule respectively
The quantity of pressure value, deflection metrology submodule is arranged according to bridge length, and industrial personal computer is according to each survey of presetting method real-time monitoring
The deflection value of point, and remote monitoring system is transferred to by remote communication module, structure is simpler, reduces system cost；It scratches
Degree measurement submodule uses opposed the first liquid storage pipe and the second liquid storage pipe, and the two size and shape are all the same, therefore, Ke Yiyou
Effect excludes influence of the surge of liquid level vibration generation to bridge deflection measurement；Interface tube is connected to using variable-diameter interface and small
Addition damping membrane can effectively weaken anti-icing fluid caused by bridge vibration and quickly flow at bore, guarantee in two opposed liquid storage pipes
Antifreezing liquid quality it is equal, improving measurement accuracy；Using double base points standardization, the vibration variation of liquid reserve tank liquid level can effectively solve
Interference, improve measurement accuracy；Replace the water in traditional communicating pipe as filling liquid using anti-icing fluid, anti-icing fluid has resistance to
Low temperature, not volatile, the advantages that being unlikely to deteriorate, environmental suitability is strong；The communication technology, the degree of automation are communicated using modern network
Height realizes the remote online monitoring of deflection of bridge span；Using deflection metrology submodule, deflection metrology can be carried out according to bridge length
The increase and decrease of submodule makes system have extensive adaptability.
Bridge deflection monitoring method of the present invention acquires each measuring point by synchronous data sampling device in real time and double base points is calibrated
The pressure value of the pressure sensor of module, the pressure value of deflection metrology submodule are divided into two parts test, first, the first closed storage
Pressure in liquid pipe, for by bridge vibration make anti-icing fluid vibration to first pressure sensor generate surge, and to its into
Row Bao Luofa processing, discharge increase the trend term being then gradually reduced, second, connection due to closing pressure caused by shut-off valve suddenly
Gross pressure in the second logical liquid storage pipe, including bridge bend caused liquid level change pressure and vehicle and cause bridge by bridge
Vibration makes anti-icing fluid vibrate surge two parts for generating to second pressure sensor, obtain i-th of measuring point of a certain moment because
Liquid level change pressure caused by bridge is bent, and combine a certain height and double base points of i-th of the measuring point of moment away from liquid reserve tank liquid level
Vertical distance L in scaling module between two pressure sensors calculates the deflection of bridge span value for obtaining i-th of measuring point, improves measurement
Precision.
Detailed description of the invention
Fig. 1 is systematic schematic diagram of the invention；
Fig. 2 is deflection metrology sub-modular structure schematic diagram；
Fig. 3 is that the amount of deflection variation that the amount of deflection variable signal that the method for the present invention is handled and laser displacement sensor accurately measure is believed
Number compare figure；
Fig. 4 is the Error Graph that the amount of deflection variable signal obtained by present invention processing and accurate signal generate；
Fig. 5 is untreated obtained amount of deflection variable signal figure compared with the signal of accurate signal；
Fig. 6 is the Error Graph that untreated obtained amount of deflection variable signal and accurate signal generate.
In figure: 1, liquid reserve tank；1-1, stomata；2, anti-icing fluid；3, double base points scaling module；4, communicating pipe；4-1, first row
Air valve；5, deflection metrology submodule；5-1, seal closure；5-2, air pipe interface；6, data/address bus；7, synchronous data sampling device；8,
Industrial personal computer；9, remote communication module；10, first pressure sensor；11, fixing gasket；12, fastening screw；13, the first liquid storage
Pipe, 14, shut-off valve, 15, second row air valve, the 16, second liquid storage pipe, 17, second pressure sensor；18, tracheae；19, communicating pipe
Interface；20, damping membrane.
Specific embodiment
With reference to the attached drawing in the embodiment of the present invention, technical solution in the embodiment of the present invention carries out clear, complete
Ground description, it is clear that described embodiment is only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
In the following description, numerous specific details are set forth in order to facilitate a full understanding of the present invention, but the present invention can be with
Implemented using other than the one described here other way, those skilled in the art can be without prejudice to intension of the present invention
In the case of do similar popularization, therefore the present invention is not limited by the specific embodiments disclosed below.
Referring to Fig. 1 ~ Fig. 2, the invention discloses a kind of opposed type deflection of bridge span remote supervision systems, including liquid reserve tank 1, company
Siphunculus 4, double base points scaling module 3, deflection metrology submodule 5, data/address bus 6, synchronous data sampling device 7, industrial personal computer 8 and long-range
Communication module 9, the liquid reserve tank 1 and double base points scaling module 3 are fixedly mounted on bridge pier, and deflection metrology submodule 5 is provided with i
A, the number of i 1-N, N are determined by the measuring point quantity needed when in-site installation, on single span bridge according to 1/2 across, 1/4 across,
3/4 across principle be uniformly mounted on bridge floor, the lower surface of bridge or bridge box house, communicating pipe 4 includes being interconnected
Vertical section and horizontal segment, the liquid reserve tank 1 and double base points scaling module 3 are mounted on the vertical section of communicating pipe 4,1 height of liquid reserve tank
Higher than horizontal segment 20-40cm, the horizontal segment of communicating pipe 4 is arranged along bridge length direction, and connects with each deflection metrology submodule 5
Logical, horizontal segment end is provided with first row air valve 4-1, for the air in discharge line, it is ensured that anti-icing fluid 2 is full of entire pipe
Road；The double base points scaling module 3, deflection metrology submodule 5, synchronous data sampling device 7, industrial personal computer 8 and remote communication module 9
It is sequentially connected by data/address bus 6；
The deflection metrology submodule 5 includes internal measurement device, and the internal measurement device includes shut-off valve 14, surge
Measurement module and gross pressure measurement module, the stress measurement module is identical with gross pressure measurement module structure, the two it
Between by 14 connection of shut-off valve together, the stress measurement module include the first liquid storage pipe 13 and first pressure sensor
10, the gross pressure measurement module includes the second liquid storage pipe 16 and second pressure sensor 17, and the first liquid storage pipe 13 and second stores up
Liquid pipe 16 is separately mounted to 14 both ends of shut-off valve, horizontal symmetrical setting, the first liquid storage pipe and the second liquid storage pipe size, shape and knot
Structure is all the same, and the first liquid storage pipe 13 is located at left end, and when the shut-off valve 14 is closed, first liquid storage pipe 13 is closed chamber,
Middle part is provided with second row air valve 15, it is ensured that anti-icing fluid 2 is full of in 13 inner cavity of the first liquid storage pipe, second liquid storage pipe 16 is connection
Cavity is connect by connection interface tube 19 with 4 horizontal segment of communicating pipe, and connection interface tube 19 is variable-diameter interface, and the upper end internal diameter is big,
Bottom diameter is small, and the small inner radius in lower end is equipped with damping membrane 20, its purpose is to avoid in vibration, the second liquid storage pipe 16
Liquid flowing in cavity guarantees that the antifreezing liquid quality in the first liquid storage pipe 13 and the second liquid storage pipe 16 keeps equal；First
First pressure sensor 10 and second pressure sensor 17, first pressure is respectively set in liquid storage pipe 13 and 16 outer end of the second liquid storage pipe
Sensor 10 and second pressure sensor 17 are respectively used to the fluid pressure in the first liquid storage pipe 13 of detection and the second liquid storage pipe 16,
The connection interface tube 19 is 1cm at a distance from the second pressure sensor 17, so that second pressure sensor 17 measured
Data are more accurate.
The double base points scaling module 3 includes upper pressure sensor and low pressure sensor, upper pressure sensor
It is communicated by data/address bus 6 with synchronous data sampling device 7 with the signal end of low pressure sensor, upper pressure sensor is under
Vertical distance between portion's pressure sensor is L, and vertically be selected as the upper pressure sensor and the low pressure of distance L passes
The 1/2 of the range ability of sensor, to guarantee the good linearity.
The deflection metrology submodule 5 further includes seal closure 5-1, and the both ends the seal closure 5-1 are respectively arranged with tracheae and connect
Mouth 5-2, is connect by tracheae 18 with liquid reserve tank 1 and other each deflection metrology submodules 5；The liquid reserve tank 1 is closed, upper part
It is provided with stomata 1-1, the stomata 1-1 is connected to by tracheae 18 with each deflection metrology submodule 5, for maintaining liquid storage
Case and each deflection metrology subsystem are in an essentially identical external measurement environment, when being subjected to unexpected vibrate always
In the external pressure balanced in one, to reduce the error interference in measurement.
In the specific application process, the present invention monitors system and calibrates mould by using communicating pipe connection liquid reserve tank, double base points
Block and deflection metrology submodule, and double base points scaling module and deflection metrology submodule are acquired by synchronous data sampling device respectively
Corresponding pressure sensor pressure values, the quantity of deflection metrology submodule is arranged according to bridge length, and industrial personal computer is according to default side
The deflection value of each measuring point of method real-time monitoring, and remote monitoring system is transferred to by remote communication module, structure is simpler,
Reduce system cost；Deflection metrology submodule uses opposed the first liquid storage pipe and the second liquid storage pipe, the two size, shape and knot
Structure is all the same, can effectively exclude influence of the surge of liquid level vibration generation to bridge deflection measurement；Connection interface tube is adopted
It can effectively weaken anti-icing fluid caused by bridge vibration with variable-diameter interface and at small-bore place addition damping membrane and quickly flow, guarantee pair
The antifreezing liquid quality in two liquid storage pipes set is equal, improving measurement accuracy；Using double base points standardization, storage can effectively solve
The interference of liquid case liquid level vibration variation, improves measurement accuracy；Replace the water in traditional communicating pipe as filling using anti-icing fluid
Liquid, anti-icing fluid have many advantages, such as it is low temperature resistant, not volatile, be unlikely to deteriorate, environmental suitability is strong；It is logical using modern network communication
Letter technology, high degree of automation realize the remote online monitoring of deflection of bridge span；It, can be according to bridge using deflection metrology submodule
Beam length carries out the increase and decrease of deflection metrology submodule, and system is made to have extensive adaptability.
The invention also discloses a kind of method remotely monitored using above-mentioned monitoring system realization deflection of bridge span, specific steps
Include:
S1, the monitoring system is set on bridge, opens shut-off valve 14, closes all second row air valves 19, opens described the
One exhaust valve 4-1 closes the first row air valve 4-1 until anti-icing fluid is flowed out from the first row air valve 4-1；According to distance
The sequence of the liquid reserve tank 1 from the distant to the near, successively opens the second row air valve 15, until anti-icing fluid flows out, closes shut-off valve
14, first liquid storage pipe 13 is in air-tight state, and the second liquid storage pipe 16 is in connection state, and system enters working condition；
S2, monitoring center remotely send Monitoring instruction, send industrial personal computer 8 to by remote communication module 9, industrial personal computer 8 controls number
The pressure value of pressure sensor in double base points scaling module 3 and deflection metrology submodule 5, double base points are acquired according to synchronous acquisition device 7
Pressure sensor in scaling module 3 is divided into upper pressure sensor and low pressure sensor, the pressure of upper pressure sensor
Force value is set as p1t, the design of pressure of low pressure sensor is p2t, any pressure sensing in deflection metrology submodule 5
The design of pressure of device is pi, pi=ρ ghi (i=1,2,3 ... n), wherein ρ is anti-icing fluid density, and g is the gravity at measuring point
Acceleration；
S3, liquid level change pressure in i-th of measuring point deflection metrology submodule 5 of t moment is calculated, sets pitIt is surveyed for i-th of t moment
Liquid level change pressure caused by bending because of bridge is put, the pressure that the second pressure sensor 17 in deflection metrology submodule 5 measures
Data include liquid level change pressure and vehicle caused by bridge is bent causes bridge vibration to make anti-icing fluid vibration to the by bridge
Surge two parts that two pressure sensors 17 generate, are denoted as p 'it；First pressure sensor in deflection metrology submodule 5
The pressure of 10 measurements, which only includes vehicle, causes bridge vibration by bridge, and then makes anti-icing fluid vibration to first pressure sensor 10
Surge is generated, p " is denoted asit；
S4, the pressure value p " that the first pressure sensor 10 is measuredit, (i=3,4,5 ... envelope method processing n) is carried out,
Specific method includes:
A, p is found out "itDiscrete pressure data all Local Extremums, obtain maximum and minimum value sequence；
B, segmentation cubic spline difference is carried out to maximum and minimum value sequence respectively to be fitted to obtain coenvelope value and lower envelope value；
C, the mean value of upper and lower envelope is calculated；
D, the discrete pressure data obtained in step a subtract the mean value of corresponding upper and lower envelope, obtain revised each
The pressure data of first pressure sensor 10 in deflection metrology submodule；
When closing shut-off valve 14, the first liquid storage pipe 13 is in air-tight state, since the difference of 14 form of shut-off valve may be such that
The initial pressure of liquid is not closed preceding pressure in first liquid storage pipe 13, and can be fluctuated a new equilbrium position, and by
The equilbrium position can be made to be a undulating value rather than steady state value in the sealing performance of valve body, so needing to use when calculating
Envelope method removes the trend term of pressure change.The pressure data measured using Bao Luofa processing first pressure sensor 10, removal
Increase the trend term being then gradually reduced suddenly due to closing pressure caused by shut-off valve 14, obtains revised each amount of deflection
The pressure data for measuring first pressure sensor 10 in submodule, is denoted as p1〃it, due to the first liquid storage pipe and the second liquid storage pipe
Size, shape and structure are all the same, therefore the signal p of caused pressure change only because deflection of bridge span changesit=p 'it -
p1〃it, (i=3,4,5...n)；
S5, difference in height of i-th of the measuring point of t moment apart from liquid reserve tank liquid level is calculated, is set as hi t,；
S6, the deflection of bridge span value for calculating i-th of measuring point of t moment, in double base points scaling module (3) setting upper pressure sensor and
Low pressure sensor, the vertical distance between upper pressure sensor and low pressure sensor are L, the setting of deflection of bridge span value
For Δ hit,。
In specific monitoring process: deflection metrology submodule 5 being installed at each measuring point of bridge, and by being arranged in bridge
Communicating pipe 4 on beam connect with liquid reserve tank 1, double base points scaling module 3, is full of anti-icing fluid 2 in entire communicating pipe 4.When installation sheet
After monitoring system, shut-off valve 14 is opened, all second row air valves 19 is closed, opens the first row air valve 4-1, until anti-icing fluid
It is flowed out from the first row air valve 4-1, drains the air in communicating pipe 4, close first row air valve 4-1；According to apart from the storage
The sequence of liquid case 1 from the distant to the near successively opens each second row air valve 15, until anti-icing fluid flows out, the deflection metrology submodule
Block 5 further includes seal closure 5-1, and the both ends the seal closure 5-1 are respectively arranged with air pipe interface 5-2, and liquid reserve tank is closed, and upper part is set
Be equipped with stomata, connect by tracheae 18 with the air pipe interface 5-2 on each deflection metrology submodule 5 so that internal measurement device with
Pressure inside liquid reserve tank is consistent；Shut-off valve 14 is closed, first liquid storage pipe 13 is in air-tight state, and vehicle passes through t moment, if
It sets the pressure that the first pressure sensor 10 in 13 outside of the first liquid storage pipe measures and causes bridge vibration by bridge for vehicle, into
And anti-icing fluid vibration is made to generate surge to first pressure sensor 10, it is denoted as p "it, and Bao Luofa processing is carried out to it, it goes
Except the trend term being then gradually reduced is increased suddenly due to closing pressure caused by shut-off valve 14, it is denoted as p1〃it；Second liquid storage pipe
16 be in connection state, and the pressure value that second pressure sensor 17 is surveyed includes liquid level change pressure and vehicle caused by bridge is bent
Cause bridge vibration that anti-icing fluid is made to vibrate the surge two parts generated to second pressure sensor 17 by bridge, is denoted as
p′it；And pressure value that the upper pressure sensor of double base points scaling module 3 and low pressure sensor are surveyed is respectively at this time
p1t、p2t；Data are transferred to industrial personal computer 8 by data/address bus 6 by deflection metrology submodule 5, and industrial personal computer 8 passes through following algorithm meters
Calculation obtains the true amount of deflection delta data of bridge:
pi=ρ ghi (i=1,2,3 ... n)；
pit=p 'it - p1〃it, (i=3,4,5 ... n)；
；
；
Wherein, piFor i-th of pressure sensor institute measuring pressure value；ρ is 2 density of anti-icing fluid；G is the acceleration of gravity at measuring point；
pitLiquid level change pressure caused by being bent for i-th of measuring point of t moment because of bridge；p′itFor i-th of measuring point of t moment because bridge is bent
Caused liquid level change pressure and vehicle pass through bridge and cause bridge vibration, and then generate anti-icing fluid vibration to pressure sensor
Surge two parts；p1″itFor i-th of measuring point of t moment because vehicle causes bridge vibration by bridge, and then make anti-icing fluid
It vibrates and the revised pressure of Bao Luofa is carried out to the surge that pressure sensor generates；hitIt is i-th of measuring point of t moment away from liquid storage
The height of case liquid level；p1t, p2tIt (is denoted as by the pressure value that two pressure sensors in t moment double base points pressure calibration module 3 are surveyed
Datum mark 1 and datum mark 2, datum mark 1 are located at 2 surface L of datum mark)；ΔhitFor i-th of deflection metrology submodule 5 of t moment
The deflection of bridge span value obtained.
Industrial personal computer 6 is by the true amount of deflection delta data of the bridge of calculating by 9 remote transmission of remote communication module in monitoring
The heart, realize bridge dynamic deflection remote online monitoring, this method by synchronous data sampling device 7 acquire in real time each measuring point and
The pressure value of the pressure sensor of double base points scaling module 3, and the pressure value of each pressure sensor of decoupled method, a certain moment
Liquid level change pressure caused by i-th of measuring point is bent because of bridge, and combine a certain height of i-th of the measuring point of moment away from liquid reserve tank liquid level
Vertical distance L in degree and double base points scaling module between two pressure sensors calculates the deflection of bridge span for obtaining i-th of measuring point
Value improves measurement accuracy.
The amount of deflection that the amount of deflection variable signal and laser displacement sensor that handle by the method for the present invention are accurately measured
Variable signal compares, and such as Fig. 3, and obtains the error of the amount of deflection variable signal and accurate signal that obtain by present invention processing
Figure, such as Fig. 4；It will compare without the obtained amount of deflection variable signal of present invention processing with the signal of accurate signal, such as Fig. 5, and
Obtain the Error Graph of the amount of deflection variable signal and accurate signal that obtain without present invention processing, such as Fig. 6.It can be seen that passing through
The amount of deflection changing value error for the bridge that the method for the present invention processing measures can greatly reduce, and can accurately measure the changing value of amount of deflection.
Claims (10)
1. a kind of opposed type deflection of bridge span remote supervision system, which is characterized in that including liquid reserve tank (1), communicating pipe (4), biradical
Point scaling module (3), deflection metrology submodule (5), data/address bus (6), synchronous data sampling device (7), industrial personal computer (8) and remotely
Communication module (9), the liquid reserve tank (1) and double base points scaling module (3) are fixedly mounted on bridge pier, deflection metrology submodule
(5) i are provided with, the number of i 1-N, N are determined by the measuring point quantity needed when in-site installation, deflection metrology submodule block gap
It uniformly is mounted on bridge floor, the lower surface of bridge or bridge box house, communicating pipe (4) includes interconnected vertical section and water
Flat section, the liquid reserve tank (1) and double base points scaling module (3) are mounted on the vertical section of communicating pipe (4), the level of communicating pipe (4)
Section is connected to each deflection metrology submodule (5)；The double base points scaling module (3), deflection metrology submodule (5), data are same
Step collector (7), industrial personal computer (8) and remote communication module (9) are sequentially connected by data/address bus (6)；
The deflection metrology submodule (5) includes internal measurement device, and the internal measurement device is equipped with gross pressure measurement module,
The gross pressure measurement module includes the second liquid storage pipe (16) and second pressure sensor (17), and second liquid storage pipe (16) is logical
It crosses the connection interface tube (19) being equipped in the middle part of it, be connected to the communicating pipe (4) horizontal segment；Second pressure sensor (17) setting
In the second liquid storage pipe (16), for detecting the fluid pressure in the second liquid storage pipe (16).
2. opposed type deflection of bridge span remote supervision system according to claim 1, it is characterised in that: add surge survey
Module is measured, the stress measurement module is identical with gross pressure measurement module structure, joins between the two by shut-off valve (14)
Lead to together；The stress measurement module includes the first liquid storage pipe (13) and first pressure sensor (10), the first liquid storage
Pipe (13) and the second liquid storage pipe (16) be separately mounted to shut-off valve (14) both ends, horizontal symmetrical be arranged, the first liquid storage pipe (13) and
The size of second liquid storage pipe (16), shape and structure are all the same, and the first liquid storage pipe (13) is located at left end, the second liquid storage pipe (16) position
In right end；When the shut-off valve (14) is closed, first liquid storage pipe (13) is closed chamber, and second liquid storage pipe (16) is connection
Cavity；First pressure sensor (10) are arranged in the left end of first liquid storage pipe (13), and first pressure sensor (10) is for examining
Survey the fluid pressure of the first liquid storage pipe (13).
3. opposed type deflection of bridge span remote supervision system according to claim 2, it is characterised in that: the double base points calibration
Module (3) includes upper pressure sensor and low pressure sensor, the letter of upper pressure sensor and low pressure sensor
Number end is communicated with synchronous data sampling device (7) by data/address bus (6), between upper pressure sensor and low pressure sensor
Vertical distance be L, the vertical range ability for being selected as the upper pressure sensor and low pressure sensor of distance L
1/2。
4. opposed type deflection of bridge span remote supervision system according to claim 3, it is characterised in that: the communicating pipe (4)
The liquid reserve tank (1) on vertical section top is highly higher than horizontal segment 20-40cm, and horizontal segment extending direction is identical as bridge length direction,
And end is provided with first row air valve (4-1)；Second row air valve (15) are provided in the middle part of first liquid storage pipe (13), for examining
It surveys in first liquid storage pipe (13) full of anti-icing fluid (2).
5. opposed type deflection of bridge span remote supervision system according to claim 4, it is characterised in that: the connection interface tube
(19) it is connected to interface tube for variable diameter, the upper end internal diameter is big, and bottom diameter is small；The small inner radius peace in connection interface tube (19) lower end
Equipped with damping membrane (20), the connection interface tube (19) is 1cm at a distance from the second pressure sensor (17).
6. opposed type deflection of bridge span remote supervision system according to claim 5, it is characterised in that: deflection metrology
Module (5) further includes seal closure (5-1), and seal closure (5-1) both ends are respectively arranged with air pipe interface (5-2), passes through gas
Pipe (18) is connected to liquid reserve tank (1) and other each deflection metrology submodules (5).
7. opposed type deflection of bridge span remote supervision system according to claim 6, it is characterised in that: the liquid reserve tank (1)
Closed, upper part is provided with stomata (1-1), and the stomata (1-1) passes through tracheae (18) and each deflection metrology submodule
(5) it connects.
8. opposed type deflection of bridge span remote supervision system according to claim 7, it is characterised in that: first liquid storage pipe
(13) and the second liquid storage pipe (16) be hollow inner wall smooth aluminium-alloy pipe, the first pressure sensor (10) and second press
Force snesor (17) is fixedly mounted on first liquid storage pipe (13) and the second liquid storage pipe (16) by fastening screw (12) respectively
Outer end, between the first pressure sensor (10) and the first liquid storage pipe (13) and second pressure sensor (17) is stored up with second
Fixing gasket (11) are provided between liquid pipe (16).
9. a kind of realize deflection of bridge span using the opposed type deflection of bridge span remote supervision system as described in any one of claim 1 ~ 8
The method remotely monitored, characterized by the following steps:
S1, the monitoring system is set on bridge, is opened shut-off valve (14), all second row air valves (19) are closed, opens institute
First row air valve (4-1) is stated, until anti-icing fluid is flowed out from the first row air valve (4-1), closes the first row air valve (4-
1)；According to the sequence apart from the liquid reserve tank (1) from the distant to the near, the second row air valve (15) is successively opened, until anti-icing fluid
Outflow is closed shut-off valve (14), and first liquid storage pipe (13) is in air-tight state, and the second liquid storage pipe (16) is in connection state, is
System enters working condition；
S2, monitoring center remotely send Monitoring instruction, are sent to industrial personal computer (8) by remote communication module (9), industrial personal computer (8)
Control the pressure of pressure sensor in synchronous data sampling device (7) acquisition double base points scaling module (3) and deflection metrology submodule (5)
Force value, the pressure sensor in double base points scaling module (3) are divided into upper pressure sensor and low pressure sensor, top pressure
The design of pressure of force snesor is p1t, the design of pressure of low pressure sensor is p2t, in deflection metrology submodule (5)
Any pressure sensor design of pressure be pi, pi=ρ ghi(i=1,2,3 ... n), wherein ρ is anti-icing fluid density, and g is
Acceleration of gravity at measuring point；
S3, liquid level change pressure in i-th of measuring point deflection metrology submodule (5) of t moment is calculated, sets pitIt is surveyed for i-th of t moment
Liquid level change pressure caused by bending because of bridge is put, second pressure sensor (17) measurement in deflection metrology submodule (5)
Liquid level change pressure caused by pressure data is bent comprising bridge causes bridge vibration to vibrate anti-icing fluid with vehicle by bridge
To surge two parts that second pressure sensor (17) generate, it is denoted as p 'it；The first pressure in deflection metrology submodule (5)
The pressure of force snesor (10) measurement, which only includes vehicle, causes bridge vibration by bridge, and then presses anti-icing fluid vibration to first
Force snesor (10) generates surge, is denoted as p "it；
S4, the pressure value p " that the first pressure sensor (10) are measuredit, (i=3,4,5 ... envelope method processing n) is carried out,
Removal increases the trend term being then gradually reduced due to closing pressure caused by shut-off valve (14) suddenly, obtains revised each
The pressure data of first pressure sensor (10), is denoted as p in deflection metrology submodule1〃it, since the first liquid storage pipe and second store up
The size of liquid pipe, shape and structure are all the same, therefore only because pressure change caused by deflection of bridge span changes signal pit
=p 'it- p1〃it, (i=3,4,5...n)；
S5, difference in height of i-th of the measuring point of t moment apart from liquid reserve tank liquid level is calculated, is set as hi t,；
S6, the deflection of bridge span value for calculating i-th of measuring point of t moment, in double base points scaling module (3) setting upper pressure sensor and
Low pressure sensor, the vertical distance between upper pressure sensor and low pressure sensor are L, the setting of deflection of bridge span value
For Δ hit,。
10. opposed type deflection of bridge span remote monitoring method according to claim 9, it is characterised in that: in the step S4,
Envelope method processing includes the following steps:
A, p is found out "itDiscrete pressure data all Local Extremums, obtain maximum and minimum value sequence；
B, segmentation cubic spline difference is carried out to maximum and minimum value sequence respectively to be fitted to obtain coenvelope value and lower envelope value；
C, the mean value of upper and lower envelope is calculated；
D, the discrete pressure data obtained in step a subtract the mean value of corresponding upper and lower envelope, obtain revised each
The pressure data p of first pressure sensor (10) in deflection metrology submodule1〃it。
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| CN201710792076.6A CN107631847A (en) | 2017-09-05 | 2017-09-05 | Deflection of bridge span remote supervision system and monitoring method based on double base points standardization |
| CN2017107920766 | 2017-09-05 |
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| CN201810819867.8A Active CN109100098B (en) | 2017-09-05 | 2018-07-24 | Method for remotely monitoring bridge deflection |
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| CN109916582A (en) * | 2019-03-28 | 2019-06-21 | 华南理工大学 | A kind of precision amount of deflection self-operated measuring unit and measurement method |
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