CN203745170U - Bridge Static Deflection Monitoring Device - Google Patents
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- 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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Abstract
Description
技术领域 technical field
本实用新型涉及一种桥梁健康监测设备,尤其涉及一种桥梁静态挠度监测装置。 The utility model relates to a bridge health monitoring device, in particular to a bridge static deflection monitoring device.
背景技术 Background technique
随着桥龄的增长,桥梁下挠问题不可避免,为了防止因过大幅度的下挠致使桥梁结构出现破坏,有必要对桥梁进行长期挠度监测,而管养者更关心桥梁的静态挠度变化,因此特别应该针对桥梁静态挠度进行长期监测及预警。 With the growth of bridge age, the problem of bridge deflection is inevitable. In order to prevent the bridge structure from being damaged due to excessive deflection, it is necessary to carry out long-term deflection monitoring on the bridge, and the maintenance personnel are more concerned about the static deflection change of the bridge. Therefore, long-term monitoring and early warning should be carried out especially for the static deflection of bridges.
纵观国内外桥梁挠度测量技术研究,基本方法有:百分表(尺)、千分表(尺)、悬垂法(悬丝法)、经纬仪、水准仪(一般水准仪、自动安平水准仪、精密水准仪、电子水准仪)、全站仪、测量机器人(智能全站仪)、静力水准装置、摄影测量法、线性差动变压器法(Linear Variable Differential Transformer,LVDT)、激光多普勒测振仪(Laser Doppler Vibrometer,LDV)、加速度传感器、专用挠度测量仪(如激光挠度仪)、GPS变形测量法、微波干涉仪(Microwave Interferometer)测量法、张力线法、竖杆式挠度监测法、低频拾震器、陀螺仪、基于加速度传感器或者倾角传感器间接估计桥梁挠度系列方法、基于光电图像的系列装置及方法、基于连通管方式的系列装置和方法等。每一种挠度测量技术都有各自的特点及适用范围,而目前基于连通管方式的挠度监测技术因其物理概念明确、测量结果相对可靠应用最为广泛。 Throughout the research on bridge deflection measurement technology at home and abroad, the basic methods are: dial indicator (foot), dial gauge (foot), suspension method (suspended wire method), theodolite, level (general level, automatic leveling level, precision level, electronic level), total station, measuring robot (intelligent total station), static leveling device, photogrammetry, linear variable differential transformer (Linear Variable Differential Transformer, LVDT), laser Doppler vibrometer (Laser Doppler Vibrometer, LDV), acceleration sensor, special deflection measuring instrument (such as laser deflection meter), GPS deformation measurement method, Microwave Interferometer (Microwave Interferometer) measurement method, tension line method, vertical rod deflection monitoring method, low frequency vibration pickup, Gyroscopes, a series of methods for indirectly estimating bridge deflection based on acceleration sensors or inclination sensors, a series of devices and methods based on photoelectric images, a series of devices and methods based on connecting pipes, etc. Each deflection measurement technology has its own characteristics and scope of application. At present, the deflection monitoring technology based on the connecting pipe method is the most widely used because of its clear physical concept and relatively reliable measurement results.
基于连通管方式的挠度监测技术的基本原理是:在桥梁上铺设连通管,且连通管与各个测点处的传感器、基准位置的容器全部连通,整个连通管内装上液体,当桥梁挠曲变形时,测点处的液位发生变化,通过传感器采集液位变化而间接得到挠度。按照采集液位变化所用的传感器类型,可分为液位传感器法和液压传感器法。按照连通管内的液体在变形过程中是否流动,可分为液体流动式的连通管法挠度监测技术和液体静止式的连通管法挠度监测技术。 The basic principle of the deflection monitoring technology based on the connecting pipe method is: laying a connecting pipe on the bridge, and the connecting pipe is connected with the sensors at each measuring point and the container at the reference position, and the whole connecting pipe is filled with liquid. , the liquid level at the measuring point changes, and the deflection is obtained indirectly by collecting the liquid level change through the sensor. According to the type of sensor used to collect liquid level changes, it can be divided into liquid level sensor method and hydraulic sensor method. According to whether the liquid in the connecting pipe flows during the deformation process, it can be divided into the liquid flow type connecting pipe method deflection monitoring technology and the liquid static type connecting pipe method deflection monitoring technology.
液体流动式的连通管法挠度监测技术的基本原理是:基于连通管静压平衡原理提出的,即在大气压作用下各连通分管内的液面处于同一水平位置,所采用的测量液位变化的传感器既有液位传感器又有液压传感器,主要用于监测桥梁静态挠度。例如授权公告号CN201387376Y公开的“一种挠度监测系统”就是基于此原理,只是所使用的传感器为光纤光栅挠度传感器,但存在的缺点是:当液体蒸发时,会导致整个液位水平面下降,各测点传感器的读数将会发生变化,导致挠度测量结果不准确。还有些方法在基准点(水箱)处再安装一个液位传感器,其它测点所测得的液位值与基准传感器液位值之差作为该点的挠度,虽能较好解决液体挥发所带来的误差,但基准传感器的精度和稳定性至关重要,测点传感器与基点传感器之间本身的相对系统误差可能会降低精度和准确度,同时,若连通管受温度影响出现热胀冷缩现象,则连通管内液位将会发生变化,也会导致挠度结果不准确。 The basic principle of the liquid flow connected pipe method deflection monitoring technology is: based on the static pressure balance principle of the connected pipe, that is, the liquid level in each connected branch pipe is at the same horizontal position under the action of atmospheric pressure, and the method used to measure the change of the liquid level is The sensors are both liquid level sensors and hydraulic sensors, and are mainly used to monitor the static deflection of the bridge. For example, the "a deflection monitoring system" disclosed by the authorized announcement number CN201387376Y is based on this principle, but the sensor used is a fiber grating deflection sensor, but the disadvantage is that when the liquid evaporates, it will cause the entire liquid level to drop. The readings from the point sensors will vary, resulting in inaccurate deflection measurements. There are also some methods to install a liquid level sensor at the reference point (water tank), and the difference between the liquid level value measured by other measuring points and the liquid level value of the reference sensor is used as the deflection of this point, although it can better solve the problem caused by liquid volatilization. However, the accuracy and stability of the reference sensor are very important. The relative system error between the measuring point sensor and the base point sensor may reduce the accuracy and accuracy. phenomenon, the liquid level in the connecting pipe will change, which will also lead to inaccurate deflection results.
液体静止式的连通管法挠度监测技术的基本原理:连通管内的液体保持静止,液位平面也保持不变,当桥梁挠度变形时,测点传感器的位置相应发生变化,传感器与液位面的压力差将发生改变,通过液压传感器采集桥梁变形前后的传感器压力差信号,间接换算得到挠度变形值。但是,此系列方法受连通管管内液体密度ρ、当地大气压强g、环境温度变化的影响较大,即使可以通过双基点法从理论上来消除ρg的影响,但是桥梁在振动情况下,安装在桥梁上的连通管装置及传感器也会跟着振动,致使连通管内产生较大的附加压力,由于液压传感器对力特别敏感,所以增加了测量噪声而使精度受限,不适合桥梁静态挠度监测。 The basic principle of liquid static connecting pipe method deflection monitoring technology: the liquid in the connecting pipe remains static, and the liquid level plane remains unchanged. When the deflection of the bridge deforms, the position of the measuring point sensor changes accordingly. The distance between the sensor and the liquid level surface The pressure difference will change, and the pressure difference signal of the sensor before and after the bridge deformation is collected by the hydraulic sensor, and the deflection deformation value is obtained through indirect conversion. However, this series of methods are greatly affected by the liquid density ρ in the connecting pipe, the local atmospheric pressure g, and the change of the ambient temperature. The connecting pipe device and sensor on the bridge will also vibrate accordingly, resulting in a large additional pressure in the connecting pipe. Since the hydraulic sensor is particularly sensitive to force, it increases the measurement noise and limits the accuracy. It is not suitable for bridge static deflection monitoring.
实用新型内容 Utility model content
针对背景技术中的问题,本实用新型提出了一种桥梁静态挠度监测装置,其结构为:所述桥梁静态挠度监测装置由大水箱、小水箱、潜水泵、两个投入式液位传感器、U形连通管、控制器、高精度液位传感器和串口继电器组成;所述小水箱设置于大水箱内,小水箱下底面与大水箱内底面固定连接,小水箱外壁与大水箱内壁所围空间形成一个半封闭容器;大水箱的侧壁上设置有排液口,小水箱的侧壁上设置有排液孔,排液孔的高度高于排液口;潜水泵设置于半封闭容器内,潜水泵的出水端与小水箱上端连通,且潜水泵的出水端高度高于排液孔,潜水泵能将半封闭容器内的水抽送至小水箱内;第一投入式液位传感器设置于小水箱内,第二投入式液位传感器设置于半封闭容器内;U形连通管一端贯穿大水箱底部后与小水箱底部连通,U形连通管另一端与高精度液位传感器的测量端连通;两个投入式液位传感器、高精度液位传感器和串口继电器均与控制器电气连接,串口继电器与潜水泵电气连接。 Aiming at the problems in the background technology, the utility model proposes a bridge static deflection monitoring device, its structure is: the bridge static deflection monitoring device consists of a large water tank, a small water tank, a submersible pump, two drop-in liquid level sensors, a U The small water tank is arranged in the large water tank, the bottom surface of the small water tank is fixedly connected with the inner bottom surface of the large water tank, and the outer wall of the small water tank and the inner wall of the large water tank form a space A semi-closed container; a drain port is provided on the side wall of the large water tank, and a drain hole is provided on the side wall of the small water tank, and the height of the drain hole is higher than the drain port; the submersible pump is arranged in the semi-closed container, and the submersible The water outlet of the pump is connected to the upper end of the small water tank, and the height of the water outlet of the submersible pump is higher than the drain hole, and the submersible pump can pump the water in the semi-closed container into the small water tank; the first drop-in liquid level sensor is set in the small water tank Inside, the second drop-in liquid level sensor is set in the semi-closed container; one end of the U-shaped connecting pipe runs through the bottom of the large water tank and then communicates with the bottom of the small water tank, and the other end of the U-shaped connecting pipe communicates with the measuring end of the high-precision liquid level sensor; An input liquid level sensor, a high-precision liquid level sensor and a serial port relay are all electrically connected to the controller, and the serial port relay is electrically connected to the submersible pump.
本实用新型的原理是:第一投入式液位传感器能对小水箱内的水位进行检测,根据设定的阈值,若水位低于阈值,则控制器通过串口继电器命令潜水泵运行一段时间,将半封闭容器内的水抽送到小水箱内,由潜水泵抽送的水量应当较大,并且要漫过排液孔,待潜水泵停机后,多余的水会顺着排液孔回流至半封闭容器内,从而使小水箱内的水位始终稳定在排液孔下沿高度;第二投入式液位传感器能对半封闭容器内的水位进行检测,根据设定的阈值,若水位低于阈值,则控制器向养护人员发出信息,以提醒养护人员向大水箱内补充水分,还可将大水箱直接与桥面的排水管道连通,在雨水丰沛的季节,可利用雨水来补充大水箱内的水分(排液口可防止水量注入过多); The principle of the utility model is: the first drop-in liquid level sensor can detect the water level in the small water tank. The water in the semi-closed container is pumped into the small water tank. The amount of water pumped by the submersible pump should be large, and it must overflow the drain hole. After the submersible pump stops, the excess water will flow back to the semi-closed container along the drain hole. so that the water level in the small water tank is always stable at the height of the lower edge of the drain hole; the second drop-in liquid level sensor can detect the water level in the semi-closed container. According to the set threshold, if the water level is lower than the threshold, then The controller sends a message to the maintenance personnel to remind the maintenance personnel to add water to the large water tank. The large water tank can also be directly connected to the drainage pipe on the bridge deck. In the rainy season, the rainwater can be used to supplement the water in the large water tank ( The drain port can prevent the water from being injected too much);
具体应用时,在桥梁上的基准点附近(一般设置在桥墩上)设置一高精准度的水平面,将大水箱及其内部的装置设置在高精准度的水平面上,然后在测点位置(一般在主跨中部)设置高精度液位传感器,高精度液位传感器的测量部和小水箱底部之间通过U形连通管连通;具体测量时,通过高精度液位传感器测量出其内部液位读数,与该液位传感器的初始液位读数之差即为当前桥梁的静态挠度;采用本实用新型的方案后,可使小水箱内水位与高精准度的水平面之间的高度差始终保持在一恒定的数值,即存在一个恒定的基准液位参考面,避免了液体蒸发、液体变质、液体密度变化、大气压强变化、环境温度变化、连通管形状变化等等因素的影响,从而使测量精度得到保证,同时,只需在测点处安装一个高精度液位传感器,某时刻的静态挠度值为该时刻的液位值与初始液位值之差,可以减小传感器系统误差带来的影响。 In specific applications, set a high-precision horizontal plane near the reference point on the bridge (generally set on the pier), set the large water tank and its internal devices on the high-precision horizontal plane, and then place the measuring point (generally set on the pier) In the middle of the main span), a high-precision liquid level sensor is installed, and the measurement part of the high-precision liquid level sensor is connected with the bottom of the small water tank through a U-shaped connecting pipe; during specific measurement, the internal liquid level reading is measured by the high-precision liquid level sensor , and the difference between the initial liquid level reading of the liquid level sensor is the static deflection of the current bridge; after adopting the scheme of the utility model, the height difference between the water level in the small water tank and the high-precision horizontal surface can always be kept at a certain level Constant value, that is, there is a constant reference liquid level reference surface, which avoids the influence of factors such as liquid evaporation, liquid deterioration, liquid density change, atmospheric pressure change, ambient temperature change, connecting pipe shape change, etc., so that the measurement accuracy can be improved. Guarantee, at the same time, only need to install a high-precision liquid level sensor at the measuring point, the static deflection value at a certain moment is the difference between the liquid level value at that moment and the initial liquid level value, which can reduce the influence of the sensor system error.
优选地,所述大水箱上端连接有一加液管,加液管上设置有滤网。加液管即可用于与桥面的排水管道连通,滤网可用于滤除水中的杂物,避免杂物在大水箱内堆积。 Preferably, a liquid feeding pipe is connected to the upper end of the large water tank, and a filter screen is arranged on the liquid feeding pipe. The liquid feeding pipe can be used to communicate with the drainage pipe on the bridge deck, and the filter screen can be used to filter out sundries in the water to avoid the accumulation of sundries in the large water tank.
优选地,所述高精度液位传感器采用磁致伸缩静力水准仪。 Preferably, the high-precision liquid level sensor adopts a magnetostrictive static level.
本实用新型的有益技术效果是:可使小水箱内水位与高精准度的水平面之间的高度差始终保持在一恒定的数值,即存在一个恒定的基准液位参考面,避免了液体蒸发、液体变质、液体密度变化、大气压强变化、环境温度变化、连通管形状变化等等因素的影响,从而使测量精度得到保证,同时,只需在测点处安装一个高精度液位传感器,某时刻的静态挠度值为该时刻的液位值与初始液位值之差,可以减小传感器系统误差带来的影响。 The beneficial technical effect of the utility model is: the height difference between the water level in the small water tank and the high-precision horizontal surface can be kept at a constant value all the time, that is, there is a constant reference liquid level reference surface, which avoids liquid evaporation, The influence of factors such as liquid deterioration, liquid density change, atmospheric pressure change, ambient temperature change, connecting pipe shape change, etc., so that the measurement accuracy is guaranteed. At the same time, only a high-precision liquid level sensor needs to be installed at the measuring point. The static deflection value of is the difference between the liquid level value at this moment and the initial liquid level value, which can reduce the influence of the sensor system error.
附图说明 Description of drawings
图1、本实用新型的结构示意图; Fig. 1, the structural representation of the utility model;
图中各个标记所对应的名称分别为:大水箱1、排液口1-1、加液管1-2、小水箱2、排液孔2-1、潜水泵3、投入式液位传感器4、U形连通管5、控制器6、高精度液位传感器7、串口继电器8。 The names corresponding to each mark in the figure are: large water tank 1, liquid discharge port 1-1, liquid filling pipe 1-2, small water tank 2, liquid discharge hole 2-1, submersible pump 3, submersible liquid level sensor 4 , U-shaped connecting pipe 5, controller 6, high-precision liquid level sensor 7, serial port relay 8.
具体实施方式 Detailed ways
一种桥梁静态挠度监测装置,其结构为:所述桥梁静态挠度监测装置由大水箱1、小水箱2、潜水泵3、两个投入式液位传感器4、U形连通管5、控制器6、高精度液位传感器7和串口继电器8组成;所述小水箱2设置于大水箱1内,小水箱2下底面与大水箱1内底面固定连接,小水箱2外壁与大水箱1内壁所围空间形成一个半封闭容器;大水箱1的侧壁上设置有排液口1-1,小水箱2的侧壁上设置有排液孔2-1,排液孔2-1的高度高于排液口1-1;潜水泵3设置于半封闭容器内,潜水泵3的出水端与小水箱2上端连通,且潜水泵3的出水端高度高于排液孔2-1,潜水泵3能将半封闭容器内的水抽送至小水箱2内;第一投入式液位传感器4设置于小水箱2内,第二投入式液位传感器4设置于半封闭容器内;U形连通管5一端贯穿大水箱1底部后与小水箱2底部连通,U形连通管5另一端与高精度液位传感器7的测量端连通;两个投入式液位传感器4、高精度液位传感器7和串口继电器8均与控制器6电气连接,串口继电器8与潜水泵3电气连接。 A bridge static deflection monitoring device, the structure of which is: the bridge static deflection monitoring device consists of a large water tank 1, a small water tank 2, a submersible pump 3, two input liquid level sensors 4, a U-shaped connecting pipe 5, and a controller 6 , a high-precision liquid level sensor 7 and a serial port relay 8; the small water tank 2 is arranged in the large water tank 1, the bottom surface of the small water tank 2 is fixedly connected with the inner bottom surface of the large water tank 1, and the outer wall of the small water tank 2 is surrounded by the inner wall of the large water tank 1 The space forms a semi-closed container; the side wall of the large water tank 1 is provided with a drain port 1-1, and the side wall of the small water tank 2 is provided with a drain hole 2-1, and the height of the drain hole 2-1 is higher than that of the drain hole. The liquid port 1-1; the submersible pump 3 is arranged in a semi-closed container, the water outlet of the submersible pump 3 communicates with the upper end of the small water tank 2, and the height of the water outlet of the submersible pump 3 is higher than the drain hole 2-1, the submersible pump 3 can Pump the water in the semi-closed container to the small water tank 2; the first drop-in liquid level sensor 4 is set in the small water tank 2, and the second drop-in liquid level sensor 4 is set in the semi-closed container; one end of the U-shaped connecting pipe 5 After passing through the bottom of the large water tank 1, it communicates with the bottom of the small water tank 2, and the other end of the U-shaped connecting pipe 5 communicates with the measuring end of the high-precision liquid level sensor 7; two input-type liquid level sensors 4, high-precision liquid level sensors 7 and serial port relays 8 are electrically connected with the controller 6, and the serial port relay 8 is electrically connected with the submersible pump 3.
进一步地,所述大水箱1上端连接有一加液管1-2,加液管1-2上设置有滤网。 Further, the upper end of the large water tank 1 is connected with a liquid-feeding pipe 1-2, and a filter screen is arranged on the liquid-feeding pipe 1-2.
进一步地,所述高精度液位传感器7采用磁致伸缩静力水准仪。 Further, the high-precision liquid level sensor 7 adopts a magnetostrictive static level.
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Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
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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 |
CN106737861A (en) * | 2016-12-05 | 2017-05-31 | 重庆华数机器人有限公司 | A kind of Robot compliance test device |
CN109506605A (en) * | 2018-12-05 | 2019-03-22 | 武汉二航路桥特种工程有限责任公司 | The beam body vertical displacement monitoring device and method of segmented construction bridges |
CN109959493A (en) * | 2019-04-29 | 2019-07-02 | 中国矿业大学 | A real-time quantitative assessment method for cable-stayed bridge cable damage 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 |
CN114991260A (en) * | 2022-07-18 | 2022-09-02 | 吉晋辉 | Secondary water supply system and method based on low energy consumption |
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2014
- 2014-03-17 CN CN201420118220.XU patent/CN203745170U/en not_active Expired - Fee Related
Cited By (13)
Publication number | Priority date | Publication date | Assignee | Title |
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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 |
CN106737861B (en) * | 2016-12-05 | 2023-06-06 | 重庆华数机器人有限公司 | A robot compliance testing device |
CN106737861A (en) * | 2016-12-05 | 2017-05-31 | 重庆华数机器人有限公司 | A kind of Robot compliance test device |
CN109506605A (en) * | 2018-12-05 | 2019-03-22 | 武汉二航路桥特种工程有限责任公司 | The beam body vertical displacement monitoring device and method of segmented construction bridges |
CN109506605B (en) * | 2018-12-05 | 2024-02-13 | 中交特种工程有限公司 | Device and method for monitoring vertical displacement of beam body of sectional construction bridge |
CN109959493A (en) * | 2019-04-29 | 2019-07-02 | 中国矿业大学 | A real-time quantitative assessment method for cable-stayed bridge cable damage based on static deflection 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 |
CN111336957B (en) * | 2020-03-09 | 2022-03-11 | 江苏远望仪器集团有限公司 | Floating dock deflection accurate measurement method based on mathematical modeling |
CN114991260A (en) * | 2022-07-18 | 2022-09-02 | 吉晋辉 | Secondary water supply system and method based on low energy consumption |
CN114991260B (en) * | 2022-07-18 | 2023-09-19 | 浙江南方智慧水务有限公司 | Low-energy-consumption-based secondary water supply system and method |
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