CN219370004U

CN219370004U - Online microwave radar displacement monitoring facilities

Info

Publication number: CN219370004U
Application number: CN202320771022.2U
Authority: CN
Inventors: 赵文举; 周干玉; 赵明杰; 胡可意; 王乐倩
Original assignee: Henan University of Technology
Current assignee: Henan University of Technology
Priority date: 2023-04-10
Filing date: 2023-04-10
Publication date: 2023-07-18
Anticipated expiration: 2033-04-10

Abstract

The utility model discloses online microwave radar displacement monitoring equipment which comprises a radar sensor, a corner reflector, a fixing device and a central controller, wherein the radar sensor comprises a radar chip and an external protective shell, the fixing device comprises a fixing support and a vibration reduction device, the fixing support is used for fixing a bridge pier and bearing the radar sensor and the central controller, the corner reflector is arranged at the bottom of a bridge span to enhance signal reflection of the radar sensor, and the central controller is a processor with a storage function and is used for storing and processing signals received by the radar sensor. The utility model solves the problems of time and labor consumption in manual detection, insufficient precision of other monitoring equipment, high assembly difficulty and inconvenience in arranging the monitoring equipment in bridge health monitoring.

Description

Online microwave radar displacement monitoring facilities

Technical Field

The utility model relates to the technical field of bridge monitoring, in particular to online microwave radar displacement monitoring equipment.

Background

At present, bridge health monitoring is an important stage of the whole life cycle of a bridge and is a preventive means for serious accidents of the bridge. The traditional detection method mainly comprises manual work, field detection is carried out regularly, actual measurement data are obtained, then a conclusion is obtained through calculation and analysis, the process period is long, and the bridge running state cannot be truly reflected. The monitoring equipment can be divided into contact type monitoring equipment and non-contact type monitoring equipment, such as an accelerometer, a strain gauge and the like, the contact type monitoring equipment needs to be directly installed at a monitoring point and a large number of data transmission lines need to be laid, the time and the labor are wasted, the durability is reduced due to long-time work, and the maintenance cost is high; non-contact type monitoring equipment such as video monitoring, GPS displacement monitoring and the like can acquire deformation information in a long distance, but the non-contact type monitoring equipment is affected by weather factors and signal errors respectively, the monitoring precision is relatively low, all-weather online work cannot be realized, and the existing monitoring radar equipment is large in size, heavy in weight and high in cost.

Disclosure of Invention

The utility model aims to provide online microwave radar displacement monitoring equipment which can accurately monitor bridge health in real time online.

The utility model adopts the technical scheme that:

the on-line microwave radar displacement monitoring equipment comprises a radar sensor, a fixing device, a corner reflector, a power supply and a central control machine, wherein the fixing device is used for fixing the radar sensor on one side of a bridge pier, and the corner reflector is fixedly arranged on the lower bottom surface of a bridge body and is matched with the radar sensor;

the fixing device is an L-shaped steel plate vertically arranged by a short plate and a long plate, a plurality of bolt holes are formed in the short plate of the L-shaped steel plate and used for being fixed on the side of the pier in height, the long plate is upwards used for placing and supporting a radar sensor and a central control machine, and the input end of the central control machine is connected with the output end of the radar sensor.

The radar chip protection device comprises a radar chip, and is characterized by further comprising an external protection shell, wherein the external protection shell is provided with a groove for accommodating the radar chip, a fixing structure is arranged in the groove, and a cover plate for sealing the radar chip is further arranged on the groove.

The vibration damper is arranged between the external protective shell and the long plate.

The steel plate structure fixed in the pier has four bolt holes, through bolted connection pier, the other end of L shaped steel plate structure has the space of holding the accuse machine and installing vibration damper.

The central control computer comprises a central processing unit, a memory and a wireless communication module, and is respectively used for information processing, storage functions and long-distance communication.

The damping device adopts a small air damping damper or a rubber damper.

The system also comprises an alarm module, wherein the alarm module is connected with the output end of the central control computer.

According to the utility model, the radar microwave units are arranged on the bridge pier of the bridge, then the corner reflectors are arranged at the positions of the bottom surface of the bridge relative to the microwave radar to detect displacement, further, the on-line real-time monitoring is realized through the remote communication module of the central control computer, the whole equipment has small size and light weight, the whole equipment is very convenient to assemble, the signal monitoring can be simultaneously implemented on a plurality of targets, the whole power is low, the precision is high, the memory occupied by stored data is small, the on-line monitoring can be realized by connecting a power supply, the monitoring efficiency and the precision cannot be influenced after long-time working, and the device has a large popularization value.

Drawings

In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the utility model, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

Fig. 1 is a schematic structural view of the present utility model.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without any inventive effort, are intended to be within the scope of the utility model.

As shown in fig. 1, the utility model comprises a radar sensor 5, a fixing device, a corner reflector 10, a power supply and a central control computer 8, wherein the fixing device is used for fixing the radar sensor 5 on one side of a bridge pier 11, and the corner reflector 10 is fixedly arranged on the lower bottom surface of a bridge body 12 and is matched with the radar sensor 5; the corner reflector and the radar sensor are located on the same vertical plane (the vertical plane where the bridge body is located), namely, the corner reflector and the radar sensor are guaranteed to be matched for displacement monitoring.

The fixing device is an L-shaped steel plate 2 vertically arranged by a short plate and a long plate, a plurality of bolt holes 7 are formed in the short plate of the L-shaped steel plate 2 and used for being fixed on the height of one side of a pier 11, the upper side of the long plate is used for placing and supporting a radar sensor 5 and a central control machine 8, and the input end of the central control machine is connected with the output end of the radar sensor.

The radar chip protection device is characterized by further comprising an external protection shell 3, wherein the external protection shell 3 is provided with a groove 1 for accommodating the radar chip, a fixed structure is arranged in the groove 1, and a cover plate 4 for sealing the radar chip is further arranged on the groove 1. Through the setting of external protective housing, can realize the stability greatly increased of device, place because foreign matter such as external environment collide or climate change, cause the influence to radar sensor.

The device also comprises a damping device 6, wherein the damping device 6 is arranged between the external protective shell 3 and the long plate. In actual use, the bridge pier and the fixing device can be connected in other forms; the type of the vibration damper can be small-sized vibration dampers such as an air damping vibration damper and a rubber vibration damper, and a proper vibration damper is selected according to the weight of the radar sensor and the influence of environmental vibration; through setting up the bumper shock absorber, the measurement that avoids because the bridge self vibration brought radar sensor influences, further improved the accuracy of monitoring.

The steel plate structure who is fixed in the pier has four bolt holes, through bolted connection pier, the other end of L shaped steel plate structure is had the space that holds well accuse machine and installation damping device on the long board promptly, can realize the integrative stability performance of device.

The central control computer 8 comprises a central processing unit, a memory and a wireless communication module, and is respectively used for information processing, storage function and long-distance communication. Through handling and storing the information of monitoring to through remote communication, and then can realize carrying out real-time supervision's technical effect to the bridge on line, the module of collocation warning makes the monitoring effect more obvious, and can let the technical staff discover the problem in the very first time, handling the problem.

In practical application, the corner reflectors 10 are equidistantly arranged at the lower part of the bridge 12 according to the bridge span length, the fixed support, namely the L-shaped steel plates 2, are arranged on the bridge piers 11, the radar sensors 5 are arranged on the L-shaped steel plates 2, the corner reflectors 10 are positioned on the same vertical plane, and the central controller 8 is also arranged on the L-shaped steel plates 2.

The included angle of the L-shaped steel plate 2 is 90 degrees, bolt holes 7 are respectively reserved at four corners of a short plate fixed on the pier, and the short plate is fixed on the pier through bolts of the L-shaped steel plate 2, so that the fixing device has better stability. The vibration damper 6 is composed of two vibration dampers, the vibration dampers are all connected with the L-shaped steel plate 2 through welding, the distance between the two vibration dampers is the width of the radar sensor 8, and the two vibration dampers are located at the edge position of the L-shaped steel plate 2, so that the transmission and the reception of radar sensor signals are facilitated. The lower structure of the radar sensor 8 is vertically connected with the vibration damper 6, and the emitting surface of the radar sensor faces to the outer side of the L-shaped steel plate and is parallel to the short plate of the L-shaped steel plate 2. The central control machine is positioned at the upper part of the steel plate structure, is connected with the steel plate structure through magnetic attraction at the rear side of the radar sensor, can be connected with a power supply and supplies power to the microwave radar sensor 8 through a data line 9.

The radar sensor side has the data exchange mouth, carries out data connection through data line 9 and well accuse machine, and external protective housing is fixed inside with the radar chip by metal casing structure 3 and apron 4, and metal casing structure 3 and apron 4 pass through the screw connection and fix, seal with waterproof thermal-insulated sealant all around.

According to the embodiment, in bridge health monitoring, a frequency-modulated continuous wave signal is transmitted to a bridge through a radar sensor, then the reflected signal is obtained through reflection of a corner reflector, vibration information of the bridge is obtained through processing of the reflected signal, and displacement of each measuring point of the bridge is calculated according to the vibration information.

In the description of the present utility model, it should be noted that, for the azimuth words such as "center", "lateral", "longitudinal", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., the azimuth and positional relationships are based on the azimuth or positional relationships shown in the drawings, it is merely for convenience of describing the present utility model and simplifying the description, and it is not to be construed as limiting the specific scope of protection of the present utility model that the device or element referred to must have a specific azimuth configuration and operation.

It should be noted that the terms "comprises" and "comprising," along with any variations thereof, in the description and claims of the present application are intended to cover non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed or inherent to such process, method, article, or apparatus, but may include other steps or elements not expressly listed.

Note that the above is only a preferred embodiment of the present utility model and uses technical principles. It will be understood by those skilled in the art that the present utility model is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the utility model. Therefore, while the present utility model has been described in connection with the above embodiments, it is to be understood that the utility model is not limited to the specific embodiments disclosed and that many other and equally effective embodiments may be devised without departing from the spirit of the utility model, and the scope thereof is determined by the scope of the appended claims.

Claims

1. An on-line microwave radar displacement monitoring device, which is characterized in that: the radar sensor is fixed on one side of the bridge pier, and the corner reflector is fixedly arranged on the lower bottom surface of the bridge body and is matched with the radar sensor;

2. The on-line microwave radar displacement monitoring device of claim 1, wherein: the radar chip protection device comprises a radar chip, and is characterized by further comprising an external protection shell, wherein the external protection shell is provided with a groove for accommodating the radar chip, a fixing structure is arranged in the groove, and a cover plate for sealing the radar chip is further arranged on the groove.

3. The on-line microwave radar displacement monitoring device of claim 2, wherein: the shock absorber is arranged between the external protective shell and the long plate.

4. An on-line microwave radar displacement monitoring device according to claim 3, wherein: the L-shaped steel plate structure fixed on the pier is provided with four bolt holes, the pier is connected through bolts, and the other end of the L-shaped steel plate structure is provided with a space for accommodating the central control unit and installing the vibration damper.

5. The on-line microwave radar displacement monitoring device of claim 4, wherein: the central control computer comprises a central processing unit, a memory and a wireless communication module, and is respectively used for information processing, storage functions and long-distance communication.

6. The on-line microwave radar displacement monitoring device of claim 5, wherein: the damping device adopts a small air damping damper or a rubber damper.

7. The on-line microwave radar displacement monitoring device of claim 6, wherein: the system also comprises an alarm module, wherein the alarm module is connected with the output end of the central control computer.