CN110470373A - A kind of two-way bridge vibration monitoring device - Google Patents
A kind of two-way bridge vibration monitoring device Download PDFInfo
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- CN110470373A CN110470373A CN201910758867.6A CN201910758867A CN110470373A CN 110470373 A CN110470373 A CN 110470373A CN 201910758867 A CN201910758867 A CN 201910758867A CN 110470373 A CN110470373 A CN 110470373A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01H—MEASUREMENT OF MECHANICAL VIBRATIONS OR ULTRASONIC, SONIC OR INFRASONIC WAVES
- G01H1/00—Measuring characteristics of vibrations in solids by using direct conduction to the detector
- G01H1/04—Measuring characteristics of vibrations in solids by using direct conduction to the detector of vibrations which are transverse to direction of propagation
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01H—MEASUREMENT OF MECHANICAL VIBRATIONS OR ULTRASONIC, SONIC OR INFRASONIC WAVES
- G01H1/00—Measuring characteristics of vibrations in solids by using direct conduction to the detector
- G01H1/04—Measuring characteristics of vibrations in solids by using direct conduction to the detector of vibrations which are transverse to direction of propagation
- G01H1/08—Amplitude
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01H—MEASUREMENT OF MECHANICAL VIBRATIONS OR ULTRASONIC, SONIC OR INFRASONIC WAVES
- G01H1/00—Measuring characteristics of vibrations in solids by using direct conduction to the detector
- G01H1/12—Measuring characteristics of vibrations in solids by using direct conduction to the detector of longitudinal or not specified vibrations
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01H—MEASUREMENT OF MECHANICAL VIBRATIONS OR ULTRASONIC, SONIC OR INFRASONIC WAVES
- G01H1/00—Measuring characteristics of vibrations in solids by using direct conduction to the detector
- G01H1/12—Measuring characteristics of vibrations in solids by using direct conduction to the detector of longitudinal or not specified vibrations
- G01H1/16—Amplitude
-
- G—PHYSICS
- G08—SIGNALLING
- G08C—TRANSMISSION SYSTEMS FOR MEASURED VALUES, CONTROL OR SIMILAR SIGNALS
- G08C17/00—Arrangements for transmitting signals characterised by the use of a wireless electrical link
- G08C17/02—Arrangements for transmitting signals characterised by the use of a wireless electrical link using a radio link
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Geophysics And Detection Of Objects (AREA)
Abstract
The invention discloses a kind of two-way bridge vibration monitoring devices, including vertical motion pick device, oscillation crosswise pick device, high-precision force sensor, GPRS wireless information carrying device, power supply unit, shell and metal base plate.It is described to be vertically made of with oscillation crosswise pick device corresponding mass unit, guide rod, spring, mass unit retaining device and protective shell；High-precision force sensor one end is connected with corresponding spring end, and the other end is fixed in metal base plate.Under power excitation, mass unit drives spring to vibrate jointly and generates elastic force, and captures spring force by high-precision sensor；GPRS wireless information carrying device is connect with high-precision sensor, and spring is transmitted to backstage by force information, obtains bridge vibration characteristic by data processing.By vertical and lateral two vibration pickup devices, bridge structure is can be achieved vertically with the independent pickoff of oscillation crosswise in the present invention, is monitored suitable for the bridge vibration under the effect of the power such as high wind, earthquake and vehicle.
Description
Technical field
The invention belongs to bridge machinery fields, and in particular to a kind of two-way bridge vibration monitoring device is, it can be achieved that earthquake, strong
The power such as wind and vehicular load act on lower bridge structure and vertically monitor with the independence of oscillation crosswise.
Background technique
Bridge structure is the key components of traffic route, is the throat of each ground section traffic connection.As one kind
Flexible structure, bridge forced vibration under the effect of the power such as carload, wind load, earthquake generate displacement, flexure, torsion etc.,
These vibratory response moment threaten the operation security of bridge, influence on long-span bridge girder construction then more significant.As the U.S. is old
Tacoma suspension bridge is destroyed because of wind-induced vibration；Japan's Tokyo Bay's channel bridge is once because Vortex-excited vibration seriously affects the health fortune of bridge
Battalion；In Wenchuan earthquakes in 2008,469, earthquake centre region highway bridge all produces different degrees of damage because of geological process.
Bridge vibration monitoring is the important content in bridge health monitoring system.Bridge is obtained by vibration monitoring means to exist
Dynamic characteristics in vibration, then analyze the health status of bridge by the information processing technology and prejudge its and further develop, this is right
Ensure that bridge operation safety is of great significance with people life property safety.In bridge kinematic analysis, especially bridge with
In the coupling analysis of the effects of vehicle, wind, shake, the acquisition of bridge vibration parameter is most important.Effectively, accurately vibration parameters are advantageous
In preferably researcher being helped to probe into the power actuated coupled relation such as bridge vibration and vehicle, wind, shake, bridge vibration is peomoted
Theoretical development is moved, the design and construction of the following larger bridge are more conducive to.
Vibration monitoring instrument is many kinds of, according to vibration measurement instrument and the positional relationship of testee can be divided into non-contact type and
Contact-type.Non-contact type vibration monitor relies primarily on optical signalling and carries out vibration pickup, such as laser vibration measurer.Non-contact type
Although vibration monitoring device measurement accuracy is higher, can remote vibration measuring, for the large span across rivers, ocean and valley
Bridge, the application of the type vibration detecting device is inconvenient, and the interference vulnerable to environmental factor declines measurement accuracy.Therefore, greatly across
It spends in the vibration monitoring of bridge, the application of contact-type vibration monitoring device is more extensive.In contact-type vibration monitoring device, according to picking up
Vibration principle can be divided into relative type motor and the mechanical pick-ups of two kinds of inertia-type and material stress type pick-up, such as fiber-optic vibration monitor.By
Need the opposite motionless reference point of testee as instrument installation site in relative type motor vibration monitor, this is in large span
Be not easy to realize in bridge, thus inertia pick-up and material stress pick-up be that main bridge vibration picks up means.
Material by taking optical fiber as an example stress type vibration monitoring device have the advantages that high sensitivity, be easy to implement telemetering, new
It is widely adopted in the health monitoring systems of bridge construction beam.But optical fibre vibration sensor need to be usually embedded in bridge structure body, right
It is inconvenient in the old bridge application of a large amount of old bridges, it replaces after optical fibre damage and is also extremely not easy.In contrast, inertia-type bridge vibration device
It is easy to use, environment fitness is good, installation is simple, calibration is easy, therefore, inertia-type vibration monitoring bridge vibration monitor field
In occupy an important position.Existing inertia-type vibration monitoring device, being capable of independent pickoff based on unidirectional or comprehensive pick-up
Bridge is vertically and the two-way vibration detecting device of oscillation crosswise is less.Due to the vertical difference with lateral geometric parameter of bridge, often shake
Dynamic characteristic also has larger difference, therefore research and development can pick up bridge vertically with the vibration monitoring device of oscillation crosswise with weight simultaneously
The meaning wanted.
Summary of the invention
To solve the above problems, the invention discloses a kind of two-way bridge vibration monitoring device, it is vertical for picking up bridge
With lateral vibration, the vertical and lateral dynamic characteristics that the power such as vehicle, high wind and earthquake act on lower bridge are obtained.
In order to achieve the above objectives, technical scheme is as follows:
A kind of two-way bridge vibration monitoring device, including by vertical mass unit, vertical mass unit retaining device, vertically lead
To the vertical motion pick device of bar, Vertical Spring and vertical pick-up cell protection shell composition and by transverse mass unit, transverse direction
The oscillation crosswise pick device that mass unit retaining device, laterally steering bar, crossed strip and lateral pick-up cell protection shell form,
And including vertical high-precision force sensor, lateral high-precision force sensor, GPRS wireless information carrying device, power supply unit and
Rigid transverse limit plate, shell and metal base plate；The metal base plate is affixed by ground anchor bolt and bridge structure, the shell
It is fixed on above metal base plate, the vertical pick-up cell protection shell is arranged on the right side of front end inside the shell, vertical pick-up unit
Shell is close in protective shell side, and vertical pick-up cell protection shell and metal base plate are affixed, and vertical guide rod is arranged in vertical pick-up
In cell protection shell, the vertical mass unit is arranged on the outside of vertical guide rod, and the vertical mass unit retaining device passes through
Vertical guide rod is connect with vertical mass unit, and Vertical Spring, Vertical Spring lower section are connected below vertical mass unit retaining device
Vertical high-precision force sensor is connected, the vertical high-precision force sensor is connect with metal base plate, the transverse direction pick-up unit
Inside the shell on the left of front end, shell, lateral pick-up cell protection are close in lateral pick-up cell protection shell-side face for protective shell setting
Rigid transverse limit plate is equipped on the right side of shell, rigid transverse limit plate and metal base plate are affixed, and the setting of laterally steering bar is picked up laterally
It shakes in cell protection shell, the transverse mass unit is arranged on the outside of laterally steering bar, and the transverse mass unit retaining device is worn
Cross laterally steering bar to connect with transverse mass unit, connect crossed strip on the right side of transverse mass unit retaining device, crossed strip with
Lateral high-precision force sensor is connected between rigid transverse limit plate, the vertical motion pick device and oscillation crosswise, which are picked up, to be filled
Retention gap between setting, the GPRS wireless information carrying device is affixed with metal base plate with power supply unit, GPRS wireless communication
Transmitting device setting rear end right side inside the shell is ceased, power supply unit setting is inside the shell on the left of rear end.
Further, the vertical guide rod is hollow pipe, built-in Vertical Spring and vertical mass unit retaining device, described
Vertical mass unit is affixed by vertical mass unit retaining device and Vertical Spring top, since vertical guide rod constrains vertically
The lateral displacement of mass unit, vertical mass unit can only generate vertical motion under power excitation, to pick up vertical motion.
Further, the laterally steering bar is hollow pipe, built-in transverse spring and transverse mass unit retaining device, described
Transverse mass unit is affixed by transverse mass unit retaining device and crossed strip, since laterally steering bar constrains mass unit
Vertical displacement, power motivates lower transverse mass unit that can only generate oscillation crosswise, to pick up oscillation crosswise.
Further, the vertical mass unit and transverse mass unit be there are hole, can make its vertically guide rod or
Laterally steering bar is free to slide；The vertical mass unit and transverse mass unit are the spheroid with sweep outline,
Its air pressure difference in vibration processes can be reduced, air damping is reduced.
Further, the vertical guide rod and the laterally steering bar are combined hollow pipes, and internal layer is steel pipe, for guiding
Bar provides rigidity, and outer layer is polytetrafluoroethylene film, can reduce the friction between guide rod and mass unit, increases mass unit vibration
Dynamic response；The vertical guide rod and laterally steering rod tube wall are provided with two corresponding strip holes, the both wings of mass unit retaining device
The connection of mass unit and spring is realized across hole.
The beneficial effects of the present invention are:
(1) elastic potential energy that will be vertically converted to spring with the mechanical energy of transverse mass unit using principle of inertia, is passed through
High-precision force sensor captures spring force, and by wireless information transfer technology remote transmission data, bridge can be achieved at the same time
Vertically with the monitoring of oscillation crosswise；
(2) simple structure of the present invention can meet different type bridge by the quality and spring rate that adjust mass unit
Monitoring accuracy requirement；By radio transmitting device, it can be achieved that remote real time monitoring under adverse circumstances, severe weather conditions；
(3) light weight, small in size, operability is good, environment resistant interference is strong, have in bridge vibration monitoring field good
Application prospect.
Detailed description of the invention
Fig. 1 is main view of the invention；
Fig. 2 is top view of the invention；
Fig. 3 is guide rod of the present invention and vibration pickup cell protection shell connection schematic diagram；
Fig. 4 is guide rod composition schematic diagram；
Fig. 5 is guide rod hole schematic diagram；
Fig. 6 is mass unit retaining device schematic diagram.
Reference signs list:
Vertical mass unit 1；Vertical mass unit retaining device 2；Vertical guide rod 3；Vertical Spring 4；Vertical motion unit
Protective shell
5；Transverse mass unit 6；Transverse mass unit retaining device 7；Laterally steering bar 8；Crossed strip 9；Oscillation crosswise list
Member protection
Shell 10；Lateral high-precision sensor 11；Rigid transverse limit plate 12；Vertical high-precision sensor 13；Shell 14；Ground
Anchor spiral shell
Bolt 15；Metal base plate 16；Bridge structure 17；GPRS radio information transmitting system 18；Power supply unit 19；Steel pipe 20；
It is poly-
Tetrafluoroethylene 21, strip hole 22.
Specific embodiment
With reference to the accompanying drawings and detailed description, the present invention is furture elucidated, it should be understood that following specific embodiments are only
For illustrating the present invention rather than limiting the scope of the invention.It should be noted that word " preceding " used in the following description,
" rear ", "left", "right", "up" and "down" refer to that the direction in attached drawing, word "inner" and "outside" refer respectively to direction or remote
Direction from geometric center of specific component.
As illustrated in fig. 1 and 2, a kind of two-way bridge vibration monitoring device of the invention is mounted on bridge by ground anchor bolt 15
In structure 17, shell 14 and metal base plate 15 are affixed, and vertical pick-up cell protection shell 5 is affixed with metal base plate 15 and is close to shell
14, lateral pick-up cell protection shell 10 is affixed with metal base plate 15 and rigid transverse limit plate 12 and is close to shell 14, vertical high
Precision force snesor 13, GPRS wireless information carrying device 18 are affixed with metal base plate 16 with power supply unit 19, laterally high-precision
It spends force snesor 11 and rigid transverse limit plate 12 is affixed, rigid transverse limit plate 12 and metal base plate 16 weld, and guarantee device
It is generated without relative displacement between interior other parts and bridge structure 17 in addition to mass unit (1,6) and spring (4,9).
As illustrated in fig. 1 and 2, GPRS wireless information carrying device 18 is high-precision close to vertical high-precision force sensor 13 and transverse direction
It spends force snesor 11 to arrange, reduces information transmission path, simplify device internal wiring；Vertical motion pick device 13 and transverse-vibration
Dynamic 11 end of pick device is close to each other but retains gap, influences each other to avoid vertical motion and oscillation crosswise；Power supply unit
19 be always that GPRS wireless information carrying device 18, vertical high mentality sensor 13 and lateral high-precision force sensor 11 provide
Power supply guarantees the long-term and effective operation of device.
As shown in Fig. 1 to 5, vertical guide rod 3 and vertical pick-up cell protection shell 5 are affixed, and laterally steering bar 8 is picked up with lateral
The cell protection shell 10 that shakes is affixed, guarantees guide rod and pick-up cell protection shell associated movement.Vertical guide rod 3 and laterally steering bar
8 be hollow pipe, and internal layer is steel pipe 20, provides rigidity for guide rod, and outer layer is polytetrafluoroethylene film 21, utilizes polytetrafluoroethylene (PTFE) material
The low frictional properties of material reduce the friction between guide rod and mass unit, and the vibration for increasing mass unit swashs response.Vertical quality list
Member 1 is designed as the spheroid of approximate sweep outline with 6 shape of transverse mass unit, to reduce the hollow air pressure of vibration processes
Difference reduces air damping.
As it can be seen in figures 5 and 6, vertical guide rod 3 is equipped with two corresponding strip holes 22 with laterally steering bar 8, make vertical quality
Unit retaining device 2 and transverse mass unit retaining device 7 can stretch out both wings from guide rod and be connected with corresponding mass unit, erect
Inside to mass unit retaining device 2 and transverse mass unit retaining device 7 again respectively with corresponding Vertical Spring 4 and crossed strip 9
End connection, to guarantee being bonded between mass unit and spring, it is ensured that mass unit vibration changes with spring internal force
Allelism.
The present apparatus is picked up to after bridge vibration excitation, and vertical high-precision sensor 13 and lateral high-precision sensor are passed through
The elastic force of Vertical Spring 4 and crossed strip 9 is captured respectively and is switched to the electrical signal of easily transmission, high-fidelity by 11, then is passed through
18 remote transmission of GPRS wireless information carrying device is to from the background.The work of the device is based primarily upon following original in the whole process
Reason:
When vibration occurs, following relationship vertically is all satisfied with the vibration system of oscillation crosswise pick device:
In formula, m is the quality of mass unit；K is spring rate；C is damped coefficient；X is mass unit relative to bridge
The displacement of structure 17, i.e. amount of spring compression；Y is the displacement generated in the vibration of bridge structure 17；T is time of vibration.
Vertical and lateral spring is captured by vertical high-precision force sensor 13 and lateral high-precision force sensor 11 respectively
Elastic force are as follows:
F=kx (2)
With x(t=0)=0 is x(t)Primary condition, then can release the vertical mass unit (1) and transverse mass of any time
The relative displacement of unit (6) are as follows:
By the way that x (t), further numerical transformation, derivation etc. can derive the relative velocity in vibrationRelative acceleration
Are as follows:
Further, then any time vibration acceleration of bridge structure 17 can be derived by above-mentioned relation formula are as follows:
After the vibration acceleration for successfully obtaining bridge structure 17, Integral Processing can be also further carried out, to obtain
Speed in 17 vibration processes of bridge structureWith amplitude y.
The technical means disclosed in the embodiments of the present invention is not limited only to technological means disclosed in above embodiment, further includes
Technical solution consisting of any combination of the above technical features.
Claims (5)
1. a kind of two-way bridge vibration monitoring device, it is characterised in that: including by vertical mass unit (1), vertical mass unit
The vertical motion pickup of retaining device (2), vertical guide rod (3), Vertical Spring (4) and vertical pick-up cell protection shell (5) composition
Device and by transverse mass unit (6), transverse mass unit retaining device (7), laterally steering bar (8), crossed strip (9) and laterally
The oscillation crosswise pick device of pick-up cell protection shell (10) composition, and including vertical high-precision force sensor (13), lateral height
Precision force snesor (11), GPRS wireless information carrying device (18), power supply unit (19) and rigid transverse limit plate (12),
Shell (14) and metal base plate (16)；The metal base plate (16) is affixed by ground anchor bolt (15) and bridge structure (17), institute
Shell to be stated to be fixed on above metal base plate (16), the vertical pick-up cell protection shell (5) is arranged on the right side of front end inside the shell,
Shell (14) are close in vertical pick-up cell protection shell (5) side, and vertical pick-up cell protection shell (5) and metal base plate (16) are solid
It connects, in vertical pick-up cell protection shell (5), vertical mass unit (1) setting is vertically being led for vertical guide rod (3) setting
On the outside of to bar (3), the vertical mass unit retaining device (2) passes through vertical guide rod (3) and connect with vertical mass unit (1),
Vertical Spring (4) are connected below vertical mass unit retaining device (2), vertical high-precision force sensing is connected below Vertical Spring (4)
Device (13), the vertical high-precision force sensor (13) connect with metal base plate (16), the transverse direction pick-up cell protection shell
(10) on the left of shell (14) inside front ends, shell (14) are close in lateral pick-up cell protection shell (10) side for setting, laterally pick up
Cell protection shell (10) right side shake equipped with rigid transverse limit plate (12), rigid transverse limit plate (12) and metal base plate (16) are solid
It connects, in lateral pick-up cell protection shell (10), the transverse mass unit (6) is arranged in transverse direction for laterally steering bar (8) setting
On the outside of guide rod (8), the transverse mass unit retaining device (7) passes through laterally steering bar (8) and transverse mass unit (6) even
Connect, connect crossed strip (9) on the right side of transverse mass unit retaining device (7), crossed strip (9) and rigid transverse limit plate (12) it
Between connect lateral high-precision force sensor (11), between retaining between the vertical motion pick device and oscillation crosswise pick device
Gap, the GPRS wireless information carrying device (18) and power supply unit (19) affixed, the GPRS wireless communication with metal base plate (16)
Transmitting device (18) setting rear end right side on the inside of shell (14) is ceased, power supply unit (19) setting rear end on the inside of shell (14) is left
Side.
2. according to a kind of two-way bridge vibration monitoring device described in claim power 1, it is characterised in that: the vertical guiding
Bar (3) is hollow pipe, built-in Vertical Spring (4) and vertical mass unit retaining device (2), and the vertical mass unit (1) passes through
Vertical mass unit retaining device (2) and Vertical Spring (4) top are affixed, since vertical guide rod (3) constrains vertical quality list
The lateral displacement of first (1), vertical mass unit (1) can only generate vertical motion under power excitation, to pick up vertical motion.
3. according to a kind of two-way bridge vibration monitoring device described in claim power 1, it is characterised in that: the laterally steering
Bar (8) is hollow pipe, built-in transverse spring (9) and transverse mass unit retaining device (7), and the transverse mass unit (6) passes through
Transverse mass unit retaining device (7) and crossed strip (9) end are affixed, since laterally steering bar (8) constrains transverse mass list
The vertical displacement of first (6), transverse mass unit (6) can only generate oscillation crosswise under power excitation, to pick up oscillation crosswise.
4. according to a kind of two-way bridge vibration monitoring device described in claim power 2 or 3, it is characterised in that: described vertical
Mass unit (1) and transverse mass unit (6) are internal there are hole, it can be made to lead along corresponding vertical guide rod (3) and laterally
It is free to slide to bar (8)；The vertical mass unit (1) and transverse mass unit (6) are the ellipsoid with sweep outline
Body.
5. according to a kind of two-way bridge vibration monitoring device described in claim power 2 or 3, it is characterised in that: described vertical
Guide rod (3) and the laterally steering bar (8) are combined hollow pipes, and internal layer is steel pipe (20), and outer layer is polytetrafluoroethylene film
(21), it is furthermore provided with strip hole (22) in vertical guide rod (3) and laterally steering bar (8) tube wall, the two of mass unit retaining device
The wing passes through the connection that hole realizes mass unit and spring.
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| CN201910758867.6A CN110470373A (en) | 2019-08-16 | 2019-08-16 | A kind of two-way bridge vibration monitoring device |
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| CN201910758867.6A CN110470373A (en) | 2019-08-16 | 2019-08-16 | A kind of two-way bridge vibration monitoring device |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111579053A (en) * | 2020-06-03 | 2020-08-25 | 赵晓勇 | Bridge swing detection early warning device based on cloud computing |
| CN111629094A (en) * | 2020-04-29 | 2020-09-04 | 东南大学 | Smart phone support towards bridge vibration monitoring |
| CN111693132A (en) * | 2020-06-23 | 2020-09-22 | 交通运输部公路科学研究所 | Bridge health monitoring system based on vibration sensor |
| CN115876317A (en) * | 2023-02-16 | 2023-03-31 | 广东石油化工学院 | Bridge vibration monitoring system based on accelerometer |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
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| CN115876317A (en) * | 2023-02-16 | 2023-03-31 | 广东石油化工学院 | Bridge vibration monitoring system based on accelerometer |
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Application publication date: 20191119 |
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