CN107883915A - A kind of bridge dynamic deflection detection method and device - Google Patents
A kind of bridge dynamic deflection detection method and device Download PDFInfo
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- CN107883915A CN107883915A CN201610874893.1A CN201610874893A CN107883915A CN 107883915 A CN107883915 A CN 107883915A CN 201610874893 A CN201610874893 A CN 201610874893A CN 107883915 A CN107883915 A CN 107883915A
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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
- G01B21/00—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant
- G01B21/32—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant for measuring the deformation in a solid
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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
- 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
- G01M5/0041—Investigating the elasticity of structures, e.g. deflection of bridges or air-craft wings by determining deflection or stress
- G01M5/005—Investigating the elasticity of structures, e.g. deflection of bridges or air-craft wings by determining deflection or stress by means of external apparatus, e.g. test benches or portable test systems
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Abstract
The present invention relates to field of civil engineering, a kind of more particularly to bridge dynamic deflection detection method and device, method includes the acceleration measurement that the measuring point on bridge is detected using acceleration transducer, and the strain value for using strain transducer to detect the longitudinal direction on bridge；Handled to obtain the acceleration drift_flux model of initial velocity value and bridge according to acceleration measurement and strain value；According to acceleration measurement, initial velocity value and acceleration drift_flux model, processing obtains the dynamic deflection of bridge；Device includes acceleration transducer, strain transducer, control unit, first processing units and second processing unit.The beneficial effect of above-mentioned technical proposal is：It is simple in construction, can efficiently solve can not determine initial time and measuring point the speed in amount of deflection direction the problem of among prior art, and error caused by timing drift existing for acceleration is excluded, improves bridge dynamic deflection measurement accuracy, reduces bridge dynamic deflection detection complexity.
Description
Technical field
The present invention relates to field of civil engineering, more particularly to a kind of bridge dynamic deflection detection method and device
Background technology
The dynamic deflection of bridge is an important parameter for detecting the security in bridge actual use.Traditional dynamic deflection
Detection method uses laser displacement gauge, resistive displacement meter etc. to be detected.Due to laser displacement gauge, the sensor such as resistive displacement meter
Must be fixedly arranged on the support of measuring point bottom, accordingly, it is difficult to being applied to below measuring point has road, river etc. these be difficult to set branch
The place of frame.
Acceleration transducer can directly detect the acceleration magnitude at bridge measuring point position independent of support.Due to dynamic deflection
It is a relation integrated twice with acceleration, in theory, the acceleration that acceleration transducer measures is integrated twice, you can
Obtain the dynamic deflection of the measuring point.Therefore, it is an ideal detection method using acceleration transducer.
When carrying out dynamic deflection calculating based on acceleration magnitude, the problem of following presently, there are:
1) it needs to be determined that the starting time and terminal time of dynamic deflection curve, then, take out the acceleration in this period of time
Angle value carries out numerical integration.But the bridge in actual use, even if without vehicle by, due to factors such as bridge pier, crosswind,
All the time a kind of micro-vibration state is in, accordingly, it is difficult to which the acceleration magnitude in time series gets on to identify rising for the dynamic deflection curve
Point time and terminal time；
2) it needs to be determined that the start time of sag curve, speed of the measuring point in amount of deflection direction.And acceleration transducer sheet
Body can not obtain this velocity amplitude.
3) because temperature etc. influences, there is small timing drift for the acceleration that acceleration transducer measures.This drift
Mobile Communication can be amplified after integration twice, produce great error.
The content of the invention
In view of above-mentioned technical problem, the present invention is directed to propose one kind can solve acceleration presence well without support
Timing drift problem, and determine the bridge dynamic deflection detection side of initial time and measuring point the speed in amount of deflection direction the problems such as
Method and device.
The present invention solve above-mentioned technical problem main technical schemes be：
A kind of bridge dynamic deflection detection method, suitable for carrying out dynamic deflection to the bridge when vehicle crosses the bridge
Detection；It is characterised in that it includes：
Step S1, the acceleration measurement of the measuring point on the bridge is detected using acceleration transducer, and used
Strain transducer synchronously detects the strain value of the longitudinal direction on the bridge；
Step S2, handled to obtain according to the acceleration measurement and the strain value initial velocity value of the bridge with
And the acceleration drift_flux model of the bridge；
Step S3, according to the acceleration measurement, the initial velocity value and the acceleration drift_flux model, place
Reason obtains the dynamic deflection of the bridge, with backed off after random.
Preferably, in the bridge dynamic deflection detection method, the step S2 is specifically included：
Step S21, handle to obtain the vehicle according to the strain value and drive into the initial time of bridge, strain peak value moment
The end of time of the bridge is sailed out of with the vehicle；
Step S22, according to the acceleration measurement, the initial time, the strain peak value moment and the terminal
Moment handles to obtain the acceleration drift_flux model of the initial velocity value of the bridge and the bridge.
Preferably, in the bridge dynamic deflection detection method, in the step S22, first according to the initial time t1With
The strain peak value moment t2Structure one is on initial velocity v0Corresponding acceleration drift_flux model ω the first relational expression, institute
State the first relational expression and represent as follows：
A1·v0+ B1 ω=C1,
Wherein,
A1=1；
t1For representing that the vehicle drives into the initial time of the bridge；
t2For representing that the vehicle sails out of the end of time of the bridge；
A (t) is used to represent the acceleration measurement that the acceleration transducer measures；
v0For representing that the vehicle drives into the initial velocity of the bridge；
ω is used to represent acceleration drift_flux model existing for the acceleration measurement.
And
Acceleration drift error system is corresponded on initial velocity according to the initial time and end of time structure one
The second several relational expressions, second relational expression represent as follows：
A2·v0+ B2 ω=C2；
Wherein,
A2=(t3-t1)；
t3For representing the strain peak value moment of the strain value；
Then, in the step S22, handle to obtain according to first relational expression and second relational expression described initial
Speed and the acceleration drift_flux model.
Preferably, in the bridge dynamic deflection detection method, the acceleration measurement a (t), the initial velocity v0And institute
State acceleration drift_flux model ω processing obtain the bridge dynamic deflection d (t) expression formula it is as follows：
Wherein,
t1For representing that the vehicle drives into the initial time of the bridge；
t2For representing that the vehicle sails out of the end of time of the bridge；
t3For representing the strain peak value moment of the strain value；
A (t) is used to represent the acceleration measurement that the acceleration transducer measures；
v0For representing that the vehicle drives into the initial velocity of the bridge；
ω is used to represent acceleration drift_flux model existing for the acceleration measurement.
Preferably, in the bridge dynamic deflection detection method, the acceleration transducer can be MEMS acceleration transducers.
Preferably, in the bridge dynamic deflection detection method, the measuring point is located at the centre position of the bridge, i.e., described to add
Velocity sensor and the strain transducer are arranged at the centre position of the bridge.
Preferably, based on above-mentioned bridge dynamic deflection detection method, a kind of bridge dynamic deflection detection device is proposed, suitable for working as
Dynamic deflection detection is carried out to the bridge when vehicle crosses the bridge；Wherein, including：
Acceleration transducer, to detect the acceleration of bridge measuring point, draw acceleration measurement；
Strain transducer, to detect the strain data of bridge longitudinal direction, draw strain value；
Control unit, the acceleration transducer and the strain transducer are connected respectively, for controlling the acceleration
The data acquisition that sensor and the strain transducer synchronize；
First processing units, the strain transducer and the acceleration transducer are connected respectively, for adding according to described
Velocity measurement and the strain value handle to obtain the initial velocity value of the bridge and acceleration drift_flux model；
Second processing unit, the first processing units are connected, for according to the acceleration measurement, the initial speed
Angle value and the acceleration drift_flux model handle to obtain the dynamic deflection of the bridge.
Preferably, in the bridge dynamic deflection detection device, the acceleration transducer can be MEMS class acceleration sensings
Device.
Preferably, in the bridge dynamic deflection detection device, the measuring point is located at the centre position of the bridge, i.e., described to add
Velocity sensor, the strain transducer, described control unit, described control unit, the first processing units and described
Two processing units are arranged at the centre position of the bridge.
Above-mentioned technical proposal has the following advantages that or beneficial effect：
The present invention proposes a kind of bridge dynamic deflection detection method and device, and apparatus of the present invention are simple in construction, can be effectively
Solve the problems, such as that the speed of initial time and measuring point in amount of deflection direction can not be determined among prior art, and exclude acceleration and deposit
Timing drift caused by error, improve bridge dynamic deflection measurement accuracy, reduce bridge dynamic deflection detection complexity.
Brief description of the drawings
With reference to appended accompanying drawing, to be described more fully embodiments of the invention.However, appended accompanying drawing be merely to illustrate and
Illustrate, and be not meant to limit the scope of the invention.
Fig. 1 is a kind of schematic flow sheet of bridge dynamic deflection detection method in the preferred embodiment of the invention；
Fig. 2 is in the preferred embodiment of the invention, and processing obtains the stream of initial velocity value and acceleration drift_flux model
Journey schematic diagram；
Fig. 3 is a kind of structural representation of bridge dynamic deflection detection device in the preferred embodiment of the invention.
Embodiment
In the following description, a large amount of concrete details are given to provide more thorough understanding of the invention.When
So in addition to these detailed descriptions, the present invention can also have other embodiment.
The present invention proposes a kind of bridge dynamic deflection detection device and method, can solve sequential existing for acceleration well
Drifting problem, and determine initial time and measuring point the speed in amount of deflection direction the problems such as.
The invention will be further described with specific embodiment below in conjunction with the accompanying drawings, it is clear that described example is only
A part of example of the present invention, rather than whole examples.The example collected based on the present invention, those of ordinary skill in the art are not being had
There are all examples made and obtained under the premise of creative work, belong to the scope of protection of the invention.
It should be noted that in the case where not conflicting, the feature in example and example in the present invention can mutually certainly
By combining.
Fig. 1 be the preferred embodiment of the invention in, a kind of schematic flow sheet of bridge dynamic deflection detection method, this kind of bridge
The specific step of dynamic deflection detection method is as follows：
Step S1, the acceleration measurement of the measuring point on bridge is detected using acceleration transducer 1, and using strain
Sensor 2 synchronously detects the strain value of the longitudinal direction on bridge；
Step S2, handled to obtain the initial velocity value of bridge and the acceleration of bridge according to acceleration measurement and strain value
Spend drift_flux model；
Step S3, according to acceleration measurement, initial velocity value and acceleration drift_flux model, processing obtains bridge
Dynamic deflection, with backed off after random.
Above-mentioned technical proposal, can solve the problem that can not determine the speed of initial time and measuring point in amount of deflection direction among prior art
The problem of spending, and error caused by timing drift existing for acceleration can be excluded, bridge dynamic deflection measurement accuracy is improved,
Reduce bridge dynamic deflection detection complexity.
In a preferred embodiment, step S2 is specifically included：
Step S21, handle to obtain vehicle according to strain value and drive into initial time, strain peak value moment and the vehicle of bridge and sail
From the end of time of bridge；
Step S22, handle to obtain bridge according to acceleration measurement, initial time, strain peak value moment and end of time
Initial velocity value and bridge acceleration drift_flux model.
Above-mentioned technical proposal, strain transducer 2 are a kind of sensings based on strain caused by measurement object receiving force deformation
Device, object kinetic energy is bigger, and pressure is bigger, and object kinetic energy changes with acceleration change, therefore, strain transducer 2 with
Acceleration transducer 1 has identical start time t1, end of time t3With peak value moment t2, solve nothing among prior art
Method determines the problem of initial time, wherein, object kinetic energy changes the general knowledge being known in the art with acceleration change, therefore not
Repeat again.
In a preferred embodiment, in step S22, first according to initial time t1With strain peak value moment t2Structure
One on initial velocity v0Corresponding acceleration drift_flux model ω the first relational expression, the first relational expression represent as follows：
A1·v0+ B1 ω=C1； (1)
Wherein,
A1=1；
t1For representing that vehicle drives into the initial time of bridge；
t2For representing that vehicle sails out of the end of time of bridge；
A (t) is used to represent the acceleration measurement that acceleration transducer 1 measures；
v0For representing that vehicle drives into the initial velocity of bridge；
ω is used to represent acceleration drift_flux model existing for acceleration measurement.
And
The second of acceleration drift_flux model is corresponded on initial velocity according to initial time and end of time structure one
Relational expression, the second relational expression represent as follows：
A2·v0+ B2 ω=C2； (2)
Wherein,
A2=(t3-t1)；
t3For representing the strain peak value moment of strain value；
Then, in step S22, handle to obtain initial velocity according to the first relational expression and the second relational expression and acceleration drifts about
Error coefficient.
Further embodiment, timing drift existing for measured acceleration be regarded as in a short time and
Time is linear, i.e., the drift error of acceleration is ω t, wherein, ω is the drift_flux model of acceleration, then drift is repaiied
Acceleration magnitude A (t)=a (t)-ω t after just；
Further embodiment, if t1The initial velocity of the beam body at moment is v0, the speed in the amount of deflection direction of the measuring point
Spend for v (t), then
Due to straining peak value moment t2For the maximum of amount of deflection, now speed is zero, then
Formula 1 can be drawn by the deformation of formula 3；
The amount of deflection of measuring point can be calculated as below
When sailing out of bridge due to vehicle, i.e. end of time t3, amount of deflection returns to zero, then
Formula 2 can be drawn by the deformation of formula 4.
In a preferred embodiment, acceleration measurement a (t), initial velocity v0With acceleration drift_flux model
The expression formula that ω processing obtains bridge dynamic deflection d (t) is as follows：
Wherein,
t1For representing that vehicle drives into the initial time of bridge；
t2For representing that vehicle sails out of the end of time of bridge；
t3For representing the strain peak value moment of strain value；
A (t) is used to represent the acceleration measurement that acceleration transducer 1 measures；
v0For representing that vehicle drives into the initial velocity of bridge；
ω is used to represent acceleration drift_flux model existing for acceleration measurement.
Further embodiment, handle to obtain according to formula 1 and formula, initial velocity v0With acceleration drift error
Coefficient ω, initial velocity v0It is expressed as follows with acceleration drift_flux model ω：
In a preferred embodiment, acceleration transducer 1 is MEMS acceleration transducers 1.
Above-mentioned technical proposal, from MEMS classes acceleration transducer 1, cost-effective, volume is small, has stable well
Property and durability, simplify the structure of bridge dynamic deflection detection device of the present invention.
In a preferred embodiment, measuring point is located at the centre position of bridge.
Above-mentioned technical proposal, measuring point is arranged at bridge centre position, measured each item data is the most accurate, by measuring point
It is techniques known to be arranged at bridge centre position, therefore is repeated no more.
Fig. 3 is a kind of structural representation of bridge dynamic deflection detection device, based on above-mentioned in the preferred embodiment of the invention
Method proposes a kind of bridge dynamic deflection detection device, suitable for carrying out dynamic deflection detection to bridge when vehicle crosses bridge, its
In, including：
Acceleration transducer 1, to detect the acceleration of bridge measuring point, draw acceleration measurement；
Strain transducer 2, to detect the strain data of bridge longitudinal direction, draw strain value；
Control unit 3, acceleration transducer 1 and strain transducer 2 is connected respectively, for controlling the He of acceleration transducer 1
The data acquisition that strain transducer 2 synchronizes；
First processing units 4, strain transducer 2 and acceleration transducer 1 are connected respectively, for according to acceleration measurement
Handle to obtain the initial velocity value of bridge and acceleration drift_flux model with strain value；
Second processing unit 5, first processing units 4 are connected, for according to acceleration measurement, initial velocity value and acceleration
Degree drift_flux model handles to obtain the dynamic deflection of bridge.
Above-mentioned technical proposal, can solve the problem that can not determine the speed of initial time and measuring point in amount of deflection direction among prior art
The problem of spending, and error caused by timing drift existing for acceleration can be excluded, bridge dynamic deflection measurement accuracy is improved,
Reduce bridge dynamic deflection detection complexity.
In a preferred embodiment, acceleration transducer 1 is MEMS class acceleration transducers.
In a preferred embodiment, bridge measuring point is in the centre position of bridge.
Above-mentioned technical proposal, measuring point is arranged at bridge centre position, measured each item data is the most accurate, by measuring point
It is techniques known to be arranged at bridge centre position, therefore is repeated no more.
In summary, the present invention proposes a kind of bridge dynamic deflection detection method, by the way that acceleration transducer and strain are passed
Sensor is combined, and is synchronously detected and is gathered the acceleration measurement and strain value at bridge measuring point position, apparatus of the present invention structure
Simply, can efficiently solve can not determine initial time and measuring point the speed in amount of deflection direction the problem of among prior art,
And error caused by timing drift existing for acceleration is excluded, improves bridge dynamic deflection measurement accuracy, bridge moving is reduced and scratches
Spend detection complexity.
Presently preferred embodiments of the present invention is described above.It is to be appreciated that the invention is not limited in above-mentioned
Particular implementation, wherein the equipment and structure be not described in detail to the greatest extent are construed as giving reality with the common mode in this area
Apply；Any those skilled in the art, without departing from the scope of the technical proposal of the invention, all using the disclosure above
Methods and technical content many possible changes and modifications are made to technical solution of the present invention, or be revised as equivalent variations etc.
Embodiment is imitated, this has no effect on the substantive content of the present invention.Therefore, every content without departing from technical solution of the present invention, foundation
The technical spirit of the present invention still falls within this hair to any simple modification, equivalent variations and modification made for any of the above embodiments
In the range of bright technical scheme protection.
Claims (9)
- A kind of 1. bridge dynamic deflection detection method, suitable for carrying out dynamic deflection inspection to the bridge when vehicle crosses the bridge Survey；It is characterised in that it includes：Step S1, the acceleration measurement of the measuring point on the bridge is detected using acceleration transducer, and using strain Sensor synchronously detects the strain value of the longitudinal direction on the bridge；Step S2, handled to obtain the initial velocity value of the bridge and institute according to the acceleration measurement and the strain value State the acceleration drift_flux model of bridge；Step S3, according to the acceleration measurement, the initial velocity value and the acceleration drift_flux model, handle To the dynamic deflection of the bridge, with backed off after random.
- 2. bridge dynamic deflection detection method as claimed in claim 1, it is characterised in that the step S2 is specifically included：Step S21, handle to obtain initial time, strain peak value moment and the institute that the vehicle drives into bridge according to the strain value State the end of time that vehicle sails out of the bridge；Step S22, according to the acceleration measurement, the initial time, the strain peak value moment and the end of time Processing obtains the initial velocity value of the bridge and the acceleration drift_flux model of the bridge.
- 3. bridge dynamic deflection detection method as claimed in claim 1, it is characterised in that in the step S22, first according to Initial time t1With the strain peak value moment t2Structure one is on initial velocity v0The of corresponding acceleration drift_flux model ω One relational expression, first relational expression represent as follows：A1·v0+ B1 ω=C1,Wherein,A1=1；<mrow> <mi>B</mi> <mn>1</mn> <mo>=</mo> <mo>-</mo> <mfrac> <mrow> <msup> <msub> <mi>t</mi> <mn>2</mn> </msub> <mn>2</mn> </msup> <mo>-</mo> <msup> <msub> <mi>t</mi> <mn>1</mn> </msub> <mn>2</mn> </msup> </mrow> <mn>2</mn> </mfrac> <mo>;</mo> </mrow><mrow> <mi>C</mi> <mn>1</mn> <mo>=</mo> <mo>-</mo> <msubsup> <mo>&Integral;</mo> <msub> <mi>t</mi> <mn>1</mn> </msub> <msub> <mi>t</mi> <mn>2</mn> </msub> </msubsup> <mi>a</mi> <mrow> <mo>(</mo> <mi>t</mi> <mo>)</mo> </mrow> <mi>d</mi> <mi>t</mi> <mo>;</mo> </mrow>t1For representing that the vehicle drives into the initial time of the bridge；t2For representing that the vehicle sails out of the end of time of the bridge；A (t) is used to represent the acceleration measurement that the acceleration transducer measures；v0For representing that the vehicle drives into the initial velocity of the bridge；ω is used to represent acceleration drift_flux model existing for the acceleration measurement.AndAcceleration drift_flux model is corresponded on initial velocity according to the initial time and end of time structure one Second relational expression, second relational expression represent as follows：A2·v0+ B2 ω=C2；Wherein,A2=(t3-t1)；<mrow> <mi>B</mi> <mn>2</mn> <mo>=</mo> <mo>-</mo> <mrow> <mo>(</mo> <mfrac> <mrow> <msup> <msub> <mi>t</mi> <mn>3</mn> </msub> <mn>3</mn> </msup> <mo>-</mo> <msup> <msub> <mi>t</mi> <mn>1</mn> </msub> <mn>3</mn> </msup> </mrow> <mn>6</mn> </mfrac> <mo>-</mo> <mfrac> <mrow> <mi>t</mi> <msup> <mn>1</mn> <mn>2</mn> </msup> <mrow> <mo>(</mo> <msub> <mi>t</mi> <mn>3</mn> </msub> <mo>-</mo> <msub> <mi>t</mi> <mn>1</mn> </msub> <mo>)</mo> </mrow> </mrow> <mn>2</mn> </mfrac> <mo>)</mo> </mrow> <mo>;</mo> </mrow><mrow> <mi>C</mi> <mn>2</mn> <mo>=</mo> <mo>-</mo> <mo>&Integral;</mo> <msubsup> <mo>&Integral;</mo> <msub> <mi>t</mi> <mn>1</mn> </msub> <msub> <mi>t</mi> <mn>3</mn> </msub> </msubsup> <mi>a</mi> <mrow> <mo>(</mo> <mi>t</mi> <mo>)</mo> </mrow> <mi>d</mi> <mi>t</mi> <mi>d</mi> <mi>t</mi> <mo>;</mo> </mrow>t3For representing the strain peak value moment of the strain value；Then, in the step S22, handle to obtain the initial velocity according to first relational expression and second relational expression With the acceleration drift_flux model.
- 4. bridge dynamic deflection detection method as claimed in claim 1, it is characterised in that the acceleration measurement a (t), described Initial velocity v0The expression formula for obtaining the bridge dynamic deflection d (t) with the acceleration drift_flux model ω processing is as follows：<mrow> <mi>d</mi> <mrow> <mo>(</mo> <mi>t</mi> <mo>)</mo> </mrow> <mo>=</mo> <msub> <mi>v</mi> <mn>0</mn> </msub> <mrow> <mo>(</mo> <mi>t</mi> <mo>-</mo> <msub> <mi>t</mi> <mn>1</mn> </msub> <mo>)</mo> </mrow> <mo>+</mo> <mo>&Integral;</mo> <msubsup> <mo>&Integral;</mo> <mrow> <mi>t</mi> <mn>1</mn> </mrow> <mi>t</mi> </msubsup> <mi>a</mi> <mo>(</mo> <mi>t</mi> <mo>)</mo> <mi>d</mi> <mi>t</mi> <mi>d</mi> <mi>t</mi> <mo>-</mo> <mi>&omega;</mi> <mrow> <mo>(</mo> <mfrac> <mrow> <msup> <mi>t</mi> <mn>3</mn> </msup> <mo>-</mo> <msup> <msub> <mi>t</mi> <mn>1</mn> </msub> <mn>3</mn> </msup> </mrow> <mn>6</mn> </mfrac> <mo>-</mo> <mfrac> <mrow> <msup> <msub> <mi>t</mi> <mn>1</mn> </msub> <mn>2</mn> </msup> <mrow> <mo>(</mo> <mi>t</mi> <mo>-</mo> <msub> <mi>t</mi> <mn>1</mn> </msub> <mo>)</mo> </mrow> </mrow> <mn>2</mn> </mfrac> <mo>)</mo> </mrow> <mo>;</mo> </mrow>Wherein,t1For representing that the vehicle drives into the initial time of the bridge；t2For representing that the vehicle sails out of the end of time of the bridge；t3For representing the strain peak value moment of the strain value；A (t) is used to represent the acceleration measurement positioned at current time t that the acceleration transducer measures；v0For representing that the vehicle drives into the initial velocity of the bridge；ω is used to represent acceleration drift_flux model existing for the acceleration measurement.
- 5. bridge dynamic deflection detection method as claimed in claim 1, it is characterised in that the acceleration transducer accelerates for MEMS Spend sensor.
- 6. bridge dynamic deflection detection method as claimed in claim 1, it is characterised in that the measuring point is located at the centre of the bridge Position.
- A kind of 7. bridge dynamic deflection detection device, suitable for carrying out dynamic deflection inspection to the bridge when vehicle crosses the bridge Survey；It is characterised in that it includes：Acceleration transducer, to detect the acceleration of bridge measuring point, draw acceleration measurement；Strain transducer, to detect the strain data of bridge longitudinal direction, draw strain value；Control unit, the acceleration transducer and the strain transducer are connected respectively, for controlling the acceleration sensing The data acquisition that device and the strain transducer synchronize；First processing units, the strain transducer and the acceleration transducer are connected respectively, for according to the acceleration Measured value and the strain value handle to obtain the initial velocity value of the bridge and acceleration drift_flux model；Second processing unit, the first processing units are connected, for according to the acceleration measurement, the initial velocity value Handle to obtain the dynamic deflection of the bridge with the acceleration drift_flux model.
- 8. the bridge dynamic deflection detection device as described in claim/7, it is characterised in that the acceleration transducer is MEMS classes Acceleration transducer.
- 9. bridge dynamic deflection detection device as claimed in claim 7, it is characterised in that the bridge measuring point is located at the bridge Centre position.
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Cited By (8)
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| CN108829998A (en) * | 2018-06-25 | 2018-11-16 | 石家庄铁道大学 | A kind of detection method of deflection of bridge span, detection device and terminal device |
| CN110132161A (en) * | 2019-06-19 | 2019-08-16 | 厦门大学 | A method of based on strain measurement mid-span deflection in bridge span |
| CN110307955A (en) * | 2019-07-19 | 2019-10-08 | 中南大学 | Well hole car load bearing beam elasticity dynamic deflection measurement method and system based on multiple spot strain perception |
| CN110553808A (en) * | 2019-08-29 | 2019-12-10 | 山东建筑大学 | Beam bridge overall rigidity evaluation method based on vehicle vibration |
| CN111289195A (en) * | 2020-03-04 | 2020-06-16 | 中国铁道科学研究院集团有限公司基础设施检测研究所 | Bridge deflection measuring system and measuring method |
| CN112461190A (en) * | 2020-11-13 | 2021-03-09 | 合肥工业大学 | Bridge deformation reconstruction method |
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| CN113494952A (en) * | 2020-03-18 | 2021-10-12 | 精工爱普生株式会社 | Measuring method, measuring apparatus, measuring system, and recording medium |
| CN113494951A (en) * | 2020-03-18 | 2021-10-12 | 精工爱普生株式会社 | Measurement method, measurement device, measurement system, and storage medium |
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| CN112461190B (en) * | 2020-11-13 | 2021-12-31 | 合肥工业大学 | Bridge deformation reconstruction method |
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