CN217155773U

CN217155773U - Device for measuring dynamic deflection of bridge

Info

Publication number: CN217155773U
Application number: CN202221052011.0U
Authority: CN
Inventors: 宋云峰; 王会峰; 王南; 柴彩萍; 赵予佳; 郭健; 王孝贤; 黄鹤; 刘盼芝; 高荣; 宋尚真
Original assignee: Weinan Highway Engineering Construction Office; Weinan Traffic Engineering Quality Supervision Station; Changan University
Current assignee: Weinan Highway Engineering Construction Office; Weinan Traffic Engineering Quality Supervision Station; Changan University
Priority date: 2022-05-05
Filing date: 2022-05-05
Publication date: 2022-08-09
Anticipated expiration: 2032-05-05

Abstract

The utility model relates to the technical field of bridge detection, in particular to a device for measuring dynamic deflection of a bridge, which comprises a hollow shell, wherein a controller and a sensor are arranged in the shell, a pendant is arranged on the upper part of the sensor, a via hole is arranged at the top of the shell, the pendant passes through the via hole to be connected with a beam body of the bridge, and the controller is used for transmitting data measured by the sensor to an upper computer; the bottom of the pendant is a plane; the bottom of the shell is provided with a leveling mechanism. Through the beam connection of connecting piece and bridge, after leveling mechanism carried out the leveling to the casing, sensor measurement sensor to the distance between the bottom of pendant, if the amount of deflection of bridge changes, the pendant can reduce to the distance between the sensor, through a plurality of the utility model discloses a data that the device was surveyed just can obtain the amount of deflection curve. Compared with the mode of using the dial indicator, the dial indicator does not need to be placed by an additional rack, the measuring time is shorter than that of the dial indicator, the cost is saved, and the time is saved.

Description

Device for measuring dynamic deflection of bridge

Technical Field

The utility model relates to a bridge detects technical field, concretely relates to a device for measuring bridge dynamic deflection.

Background

Traffic is the life of national economy, along with the development of national economy of China, a large number of traffic facilities such as bamboo shoots are continuously built in the spring after raining, China becomes a traffic infrastructure and keeps a large country after years of development, and most of the traffic infrastructure of China enters the using and maintaining period at present. The bridge is an important traffic infrastructure, in the use process, due to operation and severe environmental conditions, the operation performance is continuously deteriorated, particularly, the bearing beam body structure of the infrastructure is affected by the bearing stress for a long time, the fatigue deformation can seriously affect the integrity and the safety of the whole structure, and in order to prevent the structure from losing efficacy, the operation and maintenance of the bearing beam body structure become key points in a long period of time in the future. In order to save maintenance cost, the health detection of the beam body structure becomes a difficult point and a hot point in recent years, and the bridge deflection is an index which needs to be tested.

The existing bridge deflection measurement is mostly directly measured by a dial indicator or a displacement meter. The method has the advantages that the equipment is simple, the method can be used for multi-point detection, the deflection value of each measuring point can be directly obtained, but for bridges with small span, the deflection of the bridges is very small, and the requirement of the test precision can be met by adopting a dial indicator with high precision. The dial indicator needs a very flat placing platform when measuring, and this just needs to set up the pipe support from ground up, and very inconvenient through artifical reading, and the cost is than higher and consuming time and power.

SUMMERY OF THE UTILITY MODEL

The utility model discloses it is with high costs to need the scene to set up the platform to adopt the percentage table to measure at present, and is long consuming time, adopts electromechanical percentage table to gather the problem that the appearance is with high costs, provides a device for measuring bridge dynamic deflection.

In order to realize the purpose of the utility model, the utility model provides a following technical scheme:

a device for measuring dynamic deflection of a bridge comprises a hollow shell, wherein a controller and a sensor are installed in the shell, a pendant is arranged on the upper portion of the sensor, a through hole is formed in the top of the shell, the pendant penetrates through the through hole to be connected with a beam body of the bridge, the sensor is used for detecting the distance between the sensor and the pendant, the sensor is electrically connected with the controller, and the controller is used for transmitting data measured by the sensor to an upper computer; the bottom of the pendant is a plane; the bottom of the shell is provided with a leveling mechanism.

Preferably, the casing includes shell and base, the shell with base screw thread or screw connection, the controller passes through the copper post to be installed on the base, the group battery is installed to the bottom of controller, still install the support on the base, the sensor is installed on the support, the support is the L type. The sensor can be provided with power supply through the battery pack, and the controller can also be provided with power supply.

Preferably, the bottom of base is equipped with the connecting axle, the connecting axle is connected with leveling mechanism, leveling mechanism is the level calibration appearance, and the device passes through the connecting axle and is connected the back with the level calibration appearance, directly just can set up the position of sensor to the level through the level calibration appearance, and it is more convenient.

Preferably, the pendant is conical, and the outer diameter of the bottom of the pendant is matched with the inner diameter of the shell; a limiting mechanism is arranged in the shell. The conical pendant reduces the weight of the pendant, the shell is designed to be cylindrical, and the outer diameter of the pendant and the inner diameter of the shell are slightly smaller, so that the pendant can be prevented from shaking. In order to prevent the pendant from descending too much to injure the sensor by crashing, a limiting mechanism is arranged inside the shell.

Preferably, the limiting mechanism is a limiting screw, and the limiting screw is located on the periphery of the shell. At least one limit screw is arranged in the shell, and the length of the limit screw is larger than the gap between the pendant and the shell, so that the pendant can be prevented from continuously falling.

Preferably, be equipped with window frame and panel frame on the shell, install window glass on the window frame, install the panel on the panel frame, install switch on the panel, switch with the controller electricity is connected. The condition of the pendant can be observed through the window glass. The power can be cut off when the power supply is not used through the power switch, and electric energy is saved.

Preferably, the panel is further provided with an antenna, and the antenna can be used for networking and wirelessly transmitting distance information of the displacement sensor.

Preferably, the sensor is a CMOS laser displacement sensor, so that the detection precision is higher, and the detection real-time performance is better.

Preferably, the connecting piece with pendant threaded connection, the connecting piece is kept away from one side of pendant is equipped with the crotch. Therefore, a soft steel wire rope can be arranged between the bottom of the beam body and the pendant, the rope is connected with the hook, and the small displacement information at the bottom of the beam body is transmitted to the pendant end in real time.

Compared with the prior art, the beneficial effects of the utility model are that: the utility model discloses a connecting piece (bonding) is connected with the roof beam body of bridge, carries out the leveling back to the casing through levelling mechanism, with the real-time displacement between the bottom of laser triangle displacement sensor automatic measure sensor to pendant, if the amount of deflection of bridge changes, then the pendant also can change, the pendant can change along with it to the distance between the sensor, through a plurality of (contain singly) the utility model discloses a data that the device was surveyed just can obtain the amount of deflection curve. Compared with the mode of using the dial indicator, the method does not need to additionally set up a frame to place the dial indicator, can obtain the deflection condition of the point to be measured in real time, can realize simultaneous multipoint testing through a wireless transmission network, can obtain the real-time dynamic deflection of the whole beam body, can obtain parameters such as the impact coefficient of the bridge and the like according to the obtained data, saves the cost and saves the time.

Description of the drawings:

fig. 1 is a schematic structural diagram of the device for measuring dynamic deflection of a bridge provided by the present invention;

FIG. 2 is a cross-sectional view of the housing;

FIG. 3 is a cross-sectional view of the pendant;

FIG. 4 is a schematic view of a window glass;

FIG. 5 is a cross-sectional view of the base;

FIG. 6 is a block diagram of a hardware circuit;

fig. 7 is a displacement information processing block diagram.

The labels in the figure are: the device comprises a shell, a controller, a sensor, a 4-pendant, a 5-via hole, a 6-connecting piece, a 7-shell, a 8-base, a 9-copper column, a 10-battery pack, a 11-bracket, a 12-connecting shaft, a 13-limiting screw, a 14-window frame, a 15-panel frame, a 16-window glass, a 17-panel, an 18-power switch and an antenna, wherein the 1-shell, the 2-controller, the 3-sensor, the 4-pendant, the 5-via hole, the 6-connecting piece, the 7-shell, the 8-base, the 9-copper column, the 10-battery pack, the 11-bracket, the 12-connecting shaft, the 13-limiting screw, the 14-window frame, the 15-panel frame, the 16-window glass, the 17-panel, the 18-power switch and the 19-antenna.

Detailed Description

The present invention will be described in detail with reference to the accompanying drawings.

In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the invention.

In the description of the present invention, it is to be understood that the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships illustrated in the drawings, and are used merely for convenience of description and for simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.

In the description of the present invention, unless otherwise specified and limited, it is to be noted that the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, mechanically or electrically connected, or may be connected between two elements through an intermediate medium, or may be directly connected or indirectly connected, and specific meanings of the terms may be understood by those skilled in the art according to specific situations.

As shown in fig. 1-5, the utility model provides a device for measuring bridge dynamic deflection, including hollow casing 1, install controller 2 and sensor 3 in the casing 1, the upper portion of sensor 3 is equipped with pendant 4, and the top of casing 1 is equipped with via hole 5, pendant 4 passes via hole 5 is connected with the roof beam body of bridge, sensor 3 is used for detecting sensor 3 with distance between the pendant 4. The bottom of the shell 1 is provided with a leveling mechanism.

The shell 1 comprises a shell 7 and a base 8, and the shell 7 and the base 8 can be connected through threads or screws. A window frame 14 and a panel frame 15 are arranged on the shell 7, window glass 16 is arranged on the window frame 14, the window glass 16 is transparent, and the condition in the shell 7 can be seen through the window glass 16; the panel frame 15 is provided with a panel 17, and the panel 17 is provided with a power switch 18, an antenna 19 and the like.

Still be equipped with stop gear on shell 7, stop gear in this embodiment is spacing hole, installs stop screw 13 in the spacing hole, and this embodiment encircles shell 7 and is equipped with three spacing holes. Certainly, some or a circle of bosses can be arranged on the inner wall of the shell 7, and the diameter of the bosses is slightly smaller than that of the pendant 4, so that the pendant 4 can be limited. If the boss is designed, the top of the shell 7 and the outer wall of the shell 7 can be designed to be separated, so that the pendant 4 can be smoothly placed in the shell 7.

The cross section of base 8 is the U type, installs group battery 10 in the base 8, still is equipped with copper post 9 in the base 8, and controller 2 still is equipped with the support 11 of L type in base 8 through copper post 9 installation in base 8, will be used for measuring distance's sensor 3 to install on the horizontal segment of L type support 11. The bottom of the base 8 is provided with a connecting shaft 12, the connecting shaft 12 is connected with a leveling mechanism, and the leveling mechanism is a horizontal calibrator.

The leveling mechanism comprises an upper bottom plate, a lower bottom plate, a plurality of horizontal calibrators, a plurality of adjusting bolts and a plurality of adjusting nuts, wherein the two ends of each adjusting bolt are respectively connected with the two bottom plates, the horizontal calibrators are installed on the base 8, and the adjusting nuts are used for adjusting the levelness of the base 8. Such leveling mechanisms are relatively conventional. Only one threaded hole is arranged on the upper bottom plate to be connected with the connecting shaft 12. For convenience, a threaded hole may also be provided in the floor of the base, and the whole may then be mounted on a triangular bracket 11.

The sensor 3, the power switch 18, the antenna 19 and the like are electrically connected with the controller 2, and the controller 2 is used for transmitting data measured by the sensor 3 to an upper computer.

The pendant 4 in this embodiment is designed to be conical, and the bottom of the pendant 4 is a plane. The diameter of the bottom of the pendant 4 is slightly smaller than the inner diameter of the shell 7, so that the pendant 4 can be prevented from shaking. The top of the pendant 4 is provided with a connecting hole, the connecting piece 6 can be in threaded connection with the pendant 4, and a hook is preferably arranged at the top of the connecting piece 6 for convenient installation.

In order to make the detection data process higher, this application has adopted CMOS laser displacement sensor 3, and the displacement sensor detection distance that this embodiment adopted is 50mm 15mm, and the repeatability is 0.01 mm. The bottom plane of the pendant 4 is coated with a layer of white matte diffuse reflection paint, so that laser detection is facilitated.

Fig. 6 is a hardware circuit block diagram of the controller 2, which mainly includes an AD digital-to-analog conversion module, a power supply voltage reduction module, a wireless transmission module, and a single chip microcomputer, and completes tasks such as detection, data transmission, and display of the bridge vertical deformation amount. And meanwhile, upper computer software is designed at a remote computer terminal to display and store the measurement data, so that the remote real-time monitoring of the bridge deflection is realized. And a 12V rechargeable battery is adopted to supply power to the system.

As shown in fig. 7, a flow of displacement information processing is as follows: first, the ADS1255 collects the voltage signal of the laser displacement sensor 3 and converts it into a digital signal, and the reference voltage source in the digital-to-analog conversion is provided by the ADR 4525. Then, the processor STM32F103 reads the displacement digital signal collected by the ADS1255 through the SPI communication interface.

The STM32F103C8T6 chip is a core processor of the system, completes the calculation and processing of the displacement offset and realizes the accurate calculation of the offset.

The wireless transmission module has the functions of realizing remote data transmission between the single chip microcomputer STM32F103C8T6 and the upper computer and transmitting the offset information to the computer terminal. The device adopts E62 type transparent transmission module, supports multiple baud rate, can realize intelligent transmission control.

The working process is as follows: when the device is used, the metal sticky hook is firstly bonded at the bottom of the beam body, the thin rope with better rigidity is connected with the main body of the bridge, the other end of the rope is connected with the hook, then the pendant 4 is lifted, and then the distance between the pendant 4 and the sensor 3 is detected through the sensor 3. The sensor 3 transmits data to the AD digital-to-analog conversion module for conversion and then transmits the data to the single chip microcomputer, the data are processed by the upper computer through the wireless transmission module, the method for calculating the deflection by the upper computer according to the data is the existing method, and the method is not repeated in the application.

The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modifications, equivalents, improvements and the like made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.

Claims

1. The device for measuring the dynamic deflection of the bridge is characterized by comprising a hollow shell (1), wherein a controller (2) and a sensor (3) are installed in the shell (1), a pendant (4) is arranged on the upper portion of the sensor (3), a connecting piece (6) is arranged on the upper portion of the pendant (4), a through hole (5) is formed in the top of the shell (1), the connecting piece (6) penetrates through the through hole (5) to be connected with a beam body of the bridge, the sensor (3) is used for detecting the distance between the sensor (3) and the pendant (4), the sensor (3) is electrically connected with the controller (2), and the controller (2) is used for transmitting data measured by the sensor (3) to an upper computer; the bottom of the pendant (4) is a plane; the bottom of the shell (1) is provided with a leveling mechanism.

2. The device for measuring the dynamic deflection of a bridge according to claim 1, wherein the shell (1) comprises an outer shell (7) and a base (8), the outer shell (7) is in threaded or screwed connection with the base (8), the controller (2) is installed on the base (8) through a copper column (9), a battery pack (10) is installed at the lower part of the controller (2), a support (11) is further installed on the base (8), the sensor (3) is installed on the support (11), and the support (11) is L-shaped.

3. The device for measuring the dynamic deflection of a bridge according to claim 2, wherein a connecting shaft (12) is arranged at the bottom of the base (8), the connecting shaft (12) is connected with a leveling mechanism, and the leveling mechanism is a level calibrator.

4. The device for measuring the dynamic deflection of a bridge according to claim 1, characterized in that the pendant (4) is conical, the outer diameter of the bottom of the pendant (4) matches the inner diameter of the housing (1); a limiting mechanism is arranged in the shell (1).

5. The device for measuring the dynamic deflection of a bridge according to claim 4, characterized in that the limiting mechanism is a limiting screw (13), and the limiting screw (13) is positioned at the upper part of the pendant (4).

6. The device for measuring the dynamic deflection of a bridge according to claim 4, wherein the limiting mechanism is a boss which is arranged on the inner wall of the shell (1).

7. The device for measuring the dynamic deflection of the bridge according to claim 2, wherein a window frame (14) and a panel frame (15) are arranged on the outer shell (7), a window glass (16) is installed on the window frame (14), a panel (17) is installed on the panel frame (15), a power switch (18) is installed on the panel (17), and the power switch (18) is electrically connected with the controller (2).

8. Device for measuring the dynamic deflection of a bridge according to claim 7, characterized in that an antenna (19) is also mounted on the panel (17).

9. The device for measuring the dynamic deflection of a bridge according to claim 1, characterized in that the sensor (3) is a CMOS laser displacement sensor (3).

10. The device for measuring the dynamic deflection of a bridge according to claim 1, characterized in that the connecting piece (6) is in threaded connection with the pendant (4), and a hook is arranged on one side of the connecting piece (6) away from the pendant (4).