CN203745170U - Bridge static flexibility monitoring device - Google Patents

Bridge static flexibility monitoring device Download PDF

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Publication number
CN203745170U
CN203745170U CN201420118220.XU CN201420118220U CN203745170U CN 203745170 U CN203745170 U CN 203745170U CN 201420118220 U CN201420118220 U CN 201420118220U CN 203745170 U CN203745170 U CN 203745170U
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CN
China
Prior art keywords
water tank
liquid level
submersible pump
level sensor
communicating pipe
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Expired - Fee Related
Application number
CN201420118220.XU
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Chinese (zh)
Inventor
张洪
周建庭
蓝章礼
陈悦
杨俊�
杨建喜
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Chongqing Jiaotong University
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Chongqing Jiaotong University
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Priority to CN201420118220.XU priority Critical patent/CN203745170U/en
Application granted granted Critical
Publication of CN203745170U publication Critical patent/CN203745170U/en
Expired - Fee Related legal-status Critical Current
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Abstract

Provided is a bridge static flexibility monitoring device. A semi-closed container is formed by a space encircled by the outer wall of a small water tank and the inner wall of a large water tank. The large water tank is provided with a drain outlet, and the small water tank is provided with a drain hole, and the drain hole is higher than the drain outlet. A submersible pump is disposed in the semi-closed container, and the water outlet end of the submersible pump is communicated with the small water tank. The submersible pump is capable of pumping water from the semi-closed container to the small water tank. Two throw-in type liquid level sensors are respectively disposed in the small water tank and the semi-closed container. One end of a U-shaped communicating pipe penetrates through the bottom part of the large water tank and is communicated with the bottom part of the small water tank, and the other end of a U-shaped communicating pipe is communicated with the measuring end of a high-precision liquid level sensor. The throw-in type liquid level sensor, the high-precision liquid level sensor, and a serial port relay are all electrically connected to a controller, and the serial port relay is electrically connected to the submersible pump. The bridge static flexibility monitoring device is advantageous in that height difference between the water level of the small water tank and the high-precision horizontal plane can be always maintained at a constant value.

Description

Bridge static deflection monitoring device
Technical field
The utility model relates to a kind of bridge health monitoring equipment, relates in particular to a kind of bridge static deflection monitoring device.
Background technology
Along with the bridge growth in age, bridge downwarp problem is inevitable, in order to prevent causing bridge structure to occur destroying because crossing significantly downwarp, be necessary bridge to carry out Long-term Deflection monitoring, and Guan Yangzhe is more concerned about that the static deflection of bridge changes, and therefore should carry out long term monitoring and early warning for bridge static deflection especially.
Make a general survey of the technical research of domestic and abroad bridge deflection metrology, basic skills has: dial gauge (chi), clock gauge (chi), the method of dangling (suspension method), transit, spirit-leveling instrument (denominator instrument, automatic compensated level, precision level, electronic level), total powerstation, robot measurement (intelligent total powerstation), static level device, photogrammetry, linear variable differential transformer (LVDT) method (Linear Variable Differential Transformer, LVDT), laser doppler vibrometer (Laser Doppler Vibrometer, LDV), acceleration transducer, special deflection indicator (as laser flexometer), GPS deformation measurement method, microwave interferometer (Microwave Interferometer) mensuration, tension force collimation method, vertical bar type deflection monitoring method, low frequency geophone, gyroscope, indirectly estimate deflection of bridge span series methods based on acceleration transducer or obliquity sensor, equipment series based on photoelectric image and method, based on equipment series and the method etc. of communicating pipe mode.Each deflection metrology technology has feature and the scope of application separately, and at present based on communicating pipe mode deflection monitoring technology because of its clear physical concept, the relative reliability application of measurement result the most extensive.
Based on communicating pipe, the ultimate principle of deflection monitoring technology of mode is: on bridge, lay communicating pipe, and communicating pipe is all communicated with the sensor at each measuring point place, the container of reference position, in whole communicating pipe, load onto liquid, in the time of bridge deflection deformation, the liquid level at measuring point place changes, and is gathered liquid level variation and is indirectly obtained amount of deflection by sensor.Change sensor type used according to gathering liquid level, can be divided into liquid level sensor method and hydraulic pressure transducer method.Whether flow in deformation process according to the liquid in communicating pipe, can be divided into the communicating pipe method deflection monitoring technology and the communicating pipe method deflection monitoring technology of liquid state type of liquid flow formula.
Liquid flow formula communicating pipe method deflection monitoring technology ultimate principle be: based on communicating pipe static balance principle propose, respectively under atmospheric pressure effect be communicated with liquid level in being in charge of in same level position, the existing liquid level sensor of sensor that the measurement liquid level adopting changes has again hydraulic pressure transducer, is mainly used in monitoring bridge static deflection.For example Granted publication CN201387376Y disclosed " a kind of flexiblity monitor system " is exactly based on this principle, the sensor just using is fiber grating amount of deflection sensor, but the shortcoming existing is: in the time of liquid evaporation, can cause whole liquid level surface level to decline, the reading of each measuring point sensor will change, and causes deflection metrology result inaccurate.Also some method locates to install a liquid level sensor at reference point (water tank) again, the difference of the level value that other measuring point is measured and reference sensor level value is as the amount of deflection of this point, though can better solve the brought error that evaporates, but the precision and stability of reference sensor is most important, between measuring point sensor and basic point sensor, the relative system error of itself may reduce precision and accuracy, simultaneously, if communicating pipe there is the phenomenon of expanding with heat and contract with cold in temperature influence, in communicating pipe, liquid level will change, and also can cause amount of deflection result inaccurate.
Liquid state type communicating pipe method deflection monitoring technology ultimate principle: liquid in communicating pipe keeps static, liquid level plane also remains unchanged, in the time that deflection of bridge span is out of shape, corresponding the changing in position of measuring point sensor, the pressure differential of sensor and liquid level face will change, gather the cell pressure difference signal before and after bridge deformation by hydraulic pressure transducer, indirectly convert and obtain deflection deformation value.But, this series methods is subject to the impact of communicating pipe liquid in pipe density p, local atmospheric pressure g, variation of ambient temperature larger, even if can eliminate theoretically by double base points method the impact of ρ g, but bridge is under Vibration Condition, be arranged on bridge communicating pipe device and sensor also can and then vibrate, cause the larger additonal pressure of generation in communicating pipe, because hydraulic pressure transducer is inresponsive to Z-TEK, make precision limited so increased measurement noise, be not suitable for the monitoring of bridge static deflection.
Utility model content
For the problem in background technology, the utility model proposes a kind of bridge static deflection monitoring device, its structure is: described bridge static deflection monitoring device is made up of large water tank, little water tank, submersible pump, two throw-in type liquid level sensors, U-shaped communicating pipe, controller, high-accuracy liquid level sensor and serial ports relays; Described little water tank is arranged in large water tank, and little water tank bottom surface is fixedly connected with large water tank inner bottom surface, and little tank outer wall and large water tank inwall enclosed space form a semienclosed container; On the sidewall of large water tank, be provided with leakage fluid dram, on the sidewall of little water tank, be provided with outage, the height of outage is higher than leakage fluid dram; Submersible pump is arranged in semienclosed container, and the water side of submersible pump is communicated with little water tank upper end, and the water side height of submersible pump is higher than outage, and submersible pump can be pumped the water in semienclosed container to little water tank; The first throw-in type liquid level sensor is arranged in little water tank, and the second throw-in type liquid level sensor is arranged in semienclosed container; U-shaped communicating pipe, one end was communicated with little water tank bottom after running through large water tank bottom, U-shaped communicating pipe the other end be communicated with the measuring junction of high-accuracy liquid level sensor; Two throw-in type liquid level sensors, high-accuracy liquid level sensor and serial ports relays are all electrically connected with controller, serial ports relay and submersible pump electrical connection.
Principle of the present utility model is: the first throw-in type liquid level sensor can detect the water level in little water tank, according to the threshold value of setting, if water level is lower than threshold value, controller is by serial ports relay order submersible pump operation a period of time, water in semienclosed container is pumped in little water tank, the water yield of being pumped by submersible pump should be larger, and cover outage, after submersible pump is shut down, unnecessary water can be in outage be back to semienclosed container, thus make water level all-the-time stable in little water tank under outage along height; The second throw-in type liquid level sensor can detect the water level in semienclosed container, according to the threshold value of setting, if water level is lower than threshold value, controller sends information to maintenance personnel, to remind maintenance personnel to keep the skin wet in large water tank, also large water tank directly can be communicated with the drainage pipeline of bridge floor, in the season having plenty of rain, can utilize rainwater to supplement the moisture (leakage fluid dram can prevent that water yield injection too much) in large water tank;
When concrete application, near reference point on bridge, (operated by rotary motion is on bridge pier) arranges the surface level of a high accurancy and precision, large water tank and inner device thereof are arranged on the surface level of high accurancy and precision, then at point position (generally at main span middle part), high-accuracy liquid level sensor is set, between the measurement section of high-accuracy liquid level sensor and little water tank bottom, is communicated with by U-shaped communicating pipe, when concrete measurement, measure its inside liquid level reading by high-accuracy liquid level sensor, be the static deflection when front axle beam with the difference of the initial level readings of this liquid level sensor, adopt after scheme of the present utility model, can make the difference in height between the interior water level of little water tank and the surface level of high accurancy and precision remain at a constant numerical value, there is a constant benchmark liquid level reference surface, avoid liquid evaporation, liquid degeneration, liquid density variation, atmospheric pressure changes, variation of ambient temperature, communicating pipe change of shape etc. factor impact, thereby measuring accuracy is guaranteed, simultaneously, a high-accuracy liquid level sensor only need be installed at measuring point place, the level value that the static deflection value in certain moment is this moment is poor with initial level value, can reduce the impact that sensing system error is brought.
Preferably, described large water tank upper end is connected with a liquid-feeding tube, is provided with filter screen on liquid-feeding tube.Liquid-feeding tube can be used for being communicated with the drainage pipeline of bridge floor, and filter screen can be used for the foreign material in filtering water, avoids foreign material to pile up in large water tank.
Preferably, described high-accuracy liquid level sensor adopts magnetostriction hydrostatic level.
Useful technique effect of the present utility model is: can make the difference in height between the interior water level of little water tank and the surface level of high accurancy and precision remain at a constant numerical value, there is a constant benchmark liquid level reference surface, avoid liquid evaporation, liquid degeneration, liquid density variation, atmospheric pressure changes, variation of ambient temperature, communicating pipe change of shape etc. factor impact, thereby measuring accuracy is guaranteed, simultaneously, a high-accuracy liquid level sensor only need be installed at measuring point place, the level value that the static deflection value in certain moment is this moment is poor with initial level value, can reduce the impact that sensing system error is brought.
Brief description of the drawings
Fig. 1, structural representation of the present utility model;
In figure, the corresponding title of each mark is respectively: large water tank 1, leakage fluid dram 1-1, liquid-feeding tube 1-2, little water tank 2, outage 2-1, submersible pump 3, throw-in type liquid level sensor 4, U-shaped communicating pipe 5, controller 6, high-accuracy liquid level sensor 7, serial ports relay 8.
Embodiment
A kind of bridge static deflection monitoring device, its structure is: described bridge static deflection monitoring device is made up of large water tank 1, little water tank 2, submersible pump 3, two throw-in type liquid level sensors 4, U-shaped communicating pipe 5, controller 6, high-accuracy liquid level sensor 7 and serial ports relays 8; Described little water tank 2 is arranged in large water tank 1, and little water tank 2 bottom surfaces are fixedly connected with large water tank 1 inner bottom surface, and little water tank 2 outer walls and large water tank 1 inwall enclosed space form a semienclosed container; On the sidewall of large water tank 1, be provided with leakage fluid dram 1-1, be provided with outage 2-1 on the sidewall of little water tank 2, the height of outage 2-1 is higher than leakage fluid dram 1-1; Submersible pump 3 is arranged in semienclosed container, and the water side of submersible pump 3 is communicated with little water tank 2 upper ends, and the water side height of submersible pump 3 is higher than outage 2-1, and submersible pump 3 can be pumped the water in semienclosed container to little water tank 2; The first throw-in type liquid level sensor 4 is arranged in little water tank 2, and the second throw-in type liquid level sensor 4 is arranged in semienclosed container; U-shaped communicating pipes 5, one end was communicated with little water tank 2 bottoms after running through large water tank 1 bottom, U-shaped communicating pipes 5 other end be communicated with the measuring junction of high-accuracy liquid level sensor 7; Two throw-in type liquid level sensors 4, high-accuracy liquid level sensor 7 and serial ports relays 8 are all electrically connected with controller 6, and serial ports relay 8 is electrically connected with submersible pump 3.
Further, described large water tank 1 upper end is connected with a liquid-feeding tube 1-2, on liquid-feeding tube 1-2, is provided with filter screen.
Further, described high-accuracy liquid level sensor 7 adopts magnetostriction hydrostatic level.

Claims (3)

1. a bridge static deflection monitoring device, is characterized in that: described bridge static deflection monitoring device is made up of large water tank (1), little water tank (2), submersible pump (3), two throw-in type liquid level sensors (4), U-shaped communicating pipe (5), controller (6), high-accuracy liquid level sensor (7) and serial ports relay (8); Described little water tank (2) is arranged in large water tank (1), and little water tank (2) bottom surface is fixedly connected with large water tank (1) inner bottom surface, and little water tank (2) outer wall and large water tank (1) inwall enclosed space form a semienclosed container; On the sidewall of large water tank (1), be provided with leakage fluid dram (1-1), be provided with outage (2-1) on the sidewall of little water tank (2), the height of outage (2-1) is higher than leakage fluid dram (1-1); Submersible pump (3) is arranged in semienclosed container, the water side of submersible pump (3) is communicated with little water tank (2) upper end, and the water side height of submersible pump (3) is higher than outage (2-1), and submersible pump (3) can be pumped the water in semienclosed container to little water tank (2); The first throw-in type liquid level sensor (4) is arranged in little water tank (2), and the second throw-in type liquid level sensor (4) is arranged in semienclosed container; U-shaped communicating pipe (5) one end run through behind large water tank (1) bottom with little water tank (2) bottom be communicated with, U-shaped communicating pipe (5) other end be communicated with the measuring junction of high-accuracy liquid level sensor (7); Two throw-in type liquid level sensors (4), high-accuracy liquid level sensor (7) and serial ports relay (8) are all electrically connected with controller (6), serial ports relay (8) and submersible pump (3) electrical connection.
2. bridge static deflection monitoring device according to claim 1, is characterized in that: described large water tank (1) upper end is connected with a liquid-feeding tube (1-2), on liquid-feeding tube (1-2), is provided with filter screen.
3. bridge static deflection monitoring device according to claim 1, is characterized in that: described high-accuracy liquid level sensor (7) adopts magnetostriction hydrostatic level.
CN201420118220.XU 2014-03-17 2014-03-17 Bridge static flexibility monitoring device Expired - Fee Related CN203745170U (en)

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Application Number Priority Date Filing Date Title
CN201420118220.XU CN203745170U (en) 2014-03-17 2014-03-17 Bridge static flexibility monitoring device

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Application Number Priority Date Filing Date Title
CN201420118220.XU CN203745170U (en) 2014-03-17 2014-03-17 Bridge static flexibility monitoring device

Publications (1)

Publication Number Publication Date
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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104132630A (en) * 2014-08-14 2014-11-05 西安公路研究院 Long-term deflection monitoring system and method for long-span bridge
CN105136113A (en) * 2015-07-24 2015-12-09 张建忠 Tunnel settlement level monitoring system
CN109959493A (en) * 2019-04-29 2019-07-02 中国矿业大学 A kind of cable-stayed bridge cable damage real-time quantitative appraisal procedure based on natural bow modeling
CN111336957A (en) * 2020-03-09 2020-06-26 江苏远望仪器集团有限公司 Floating dock deflection accurate measurement method based on mathematical modeling

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104132630A (en) * 2014-08-14 2014-11-05 西安公路研究院 Long-term deflection monitoring system and method for long-span bridge
CN105136113A (en) * 2015-07-24 2015-12-09 张建忠 Tunnel settlement level monitoring system
CN105136113B (en) * 2015-07-24 2018-05-18 张建忠 A kind of level monitoring system of tunnel subsidence
CN109959493A (en) * 2019-04-29 2019-07-02 中国矿业大学 A kind of cable-stayed bridge cable damage real-time quantitative appraisal procedure based on natural bow modeling
CN109959493B (en) * 2019-04-29 2020-07-24 中国矿业大学 Cable-stayed bridge cable damage real-time quantitative evaluation method based on static deflection modeling
CN111336957A (en) * 2020-03-09 2020-06-26 江苏远望仪器集团有限公司 Floating dock deflection accurate measurement method based on mathematical modeling

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GR01 Patent grant
EXPY Termination of patent right or utility model
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20140730

Termination date: 20150317