Expansion joint device with monitoring function

Abstract

The utility model relates to the technical field of road expansion devices, in particular to an expansion joint device with a monitoring function, which is arranged on a beam body and comprises an expansion structure, a sensor system, a data acquisition system and a terminal data processing center, the beam body comprises a first beam body and a second beam body, and the expansion structure is arranged between the first beam body and the second beam body. The sensor system is arranged on the beam body or the telescopic structure, the sensor system is connected with the data acquisition system, the data acquisition system is connected with the terminal data processing center, and the terminal data processing center is used for displaying the operation state of the telescopic structure in real time. By integrating the sensor technology, the data processing technology and the mechanical structure design technology, the state of the expansion joint can be monitored in real time, abnormal conditions can be found and processed in time through data analysis, and the use safety and the maintenance efficiency of the expansion joint are improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to highway expansion joint device technical field, especially a expansion joint device with monitoring function. BACKGROUND

[0002] Bridge expansion joint device as the important component member of bridge structure, usually set up in the position that bridge structure is relatively weak, bear connecting two side beam body, for adjusting the displacement and deformation between structures caused by vehicle load, bridge building materials and environmental factors, in recent years, along with people's increasing concern to bridge safety,

[0003] Bridge expansion joint as the part that is most easily damaged and difficult to maintain in bridge, its performance and stability directly affect the safety and durability of bridge structure, its importance is more prominent. How to find the damage of bridge expansion joint in early stage and stop loss in time becomes an important matter.

[0004] The monitoring method of the existing bridge expansion joint is artificial inspection, which mainly qualitatively analyzes the structure state of the bridge expansion joint according to the difference between the sound emitted by the bridge expansion joint under normal state and the sound emitted by the bridge expansion joint under abnormal state under the action of live load, to determine whether further monitoring or maintenance is needed. After the monitoring is completed, the inspection personnel need to provide the structure state of the bridge expansion joint to the bridge manager in the form of a report to guide the bridge manager to make maintenance treatment. Therefore, this artificial inspection monitoring method can only be checked regularly, and cannot perform real-time monitoring on the bridge expansion joint, and has poor responsiveness.

[0005] Publication No. CN109235256A a new type of bridge expansion joint device capable of monitoring beam end displacement, including beam body one, beam body two, expansion system, distributed displacement measurement system, the distributed displacement measurement system includes spring group, top plate, tension and compression force sensor, anchor bolt, side plate, wireless data transmission module, the wireless data transmission module is arranged on the side plate, the wireless data transmission module automatically analyzes and processes the data collected by the tension and compression force sensor, that is, the deformation of the expansion joint and the transverse bridge direction angle of the beam end can be converted, and transmitted to the monitoring center. Although the application discloses using sensors to detect the expansion joint device, only a small amount of sensors such as tension and compression force sensors are configured, which cannot monitor the expansion joint device in all directions, and cannot accurately evaluate the health status of the expansion joint device.

[0006] Therefore, a expansion joint device with monitoring function is needed to realize real-time and accurate monitoring and early warning of the operation state of the bridge expansion joint device. SUMMARY

[0007] Therefore, the utility model aims at providing a expansion joint device with monitoring function, solves the problem that prior art cannot carry out all -round real -time accurate monitoring and early warning to expansion joint device.

[0008] The technical scheme of the utility model is as follows: a expansion joint device with monitoring function is arranged on a beam body, comprising expansion structure, sensor system, data acquisition system and terminal data processing center, the beam body comprises first beam body and second beam body, the expansion structure is arranged between the first beam body and the second beam body, the sensor system is arranged on the beam body or the expansion structure, the sensor system is connected with the data acquisition system, the data acquisition system is connected with the terminal data processing center, and the terminal data processing center is used for real -time display the running state of the expansion structure;

[0009] The sensor system comprises:

[0010] The tensioned wire displacement sensor is used for monitoring the overall tension and compression of the expansion structure.

[0011] The stress strain sensor is used for determining the stress state of the expansion structure.

[0012] The vibration sensor is used for monitoring the vibration of the expansion structure during vehicle driving.

[0013] The deflection sensor is used for monitoring the deflection change of the expansion structure under stress state.

[0014] The jacking rod displacement sensor is used for monitoring the uniformity of the middle beam displacement of the expansion structure.

[0015] The temperature sensor is used for monitoring the temperature change around the expansion structure.

[0016] The camera is used for shooting the state of each component of the expansion structure, recording the image and time information of the vehicle passing through the bridge deck.

[0017] Further, the tensioned wire displacement sensor comprises a displacement sensor body and a tensioned wire end, the displacement sensor body is arranged at the fixed end of the expansion structure or the first beam body, and the tensioned wire end is arranged at the movable end of the expansion structure or the second beam body.

[0018] Further, the stress strain sensor is fixed at the middle beam or the side beam welding weak place of the expansion structure or the stress concentration place of the middle beam or the side beam through bolt or adhesive.

[0019] The vibration sensor is adsorbed on the bottom of the expansion structure through a magnetic base.

[0020] The deflection sensor is arranged on the top of the beam body pier.

[0021] The temperature sensor is fixed to both ends of the telescopic structure in the direction of vehicle travel by bolts.

[0022] Further, displacement blocks are arranged on the multiple middle beams of the telescopic structure in the direction of vehicle travel and perpendicular to the direction of vehicle travel, respectively, and the top rod displacement sensor is arranged between the displacement block and the adjacent middle beam.

[0023] Further, at least two cameras are installed below the telescopic structure and the bridge deck, respectively, the camera is connected with the upper surface of the beam body through a first connecting device, and the camera is connected with the telescopic structure through a second connecting device.

[0024] Further, the first connecting device comprises a fixed support and a protective cover, the fixed support is used for installing and fixing the camera, and the protective cover is used for preventing rain and snow from affecting the working of the camera.

[0025] Further, the second connecting device comprises a sliding support, a driving device and a connecting support, the sliding support is arranged on the side surface of the first beam body, the connecting support and the sliding support form a sliding connection structure, the driving device is used for driving the connecting support to move, and the connecting support is used for connecting the camera.

[0026] Further, the data acquisition system comprises a data acquisition module and a preprocessing module, the data acquisition module is used for receiving the data of each sensor, the preprocessing module is used for preliminarily comparing and analyzing the transmitted data, the preprocessing module is connected with a vehicle data calculation module and the camera, and is used for recording the image and time information of the vehicle passing through the bridge deck.

[0027] Further, the terminal data processing center further comprises a remote monitoring function module, which is used for real-time viewing of the state of the expansion joint by the management personnel.

[0028] Further, the terminal data processing center further comprises an alarm module, which is used for pushing the abnormal message to the management personnel through the client or the mobile APP.

[0029] Compared with the prior art, the telescopic joint device with the monitoring function has the following advantages:

[0030] 1. The telescopic joint device with the monitoring function integrates the sensor technology, the data processing technology and the mechanical structure design technology, can realize real-time monitoring of the state of the telescopic joint, and can discover and handle the abnormal situation in time through data analysis, thereby improving the use safety and the maintenance efficiency of the telescopic joint.

[0031] 2. The utility model discloses a plurality of monitoring sensors are integrated, and install setting in reasonable position, adopt different connecting structure, can overall monitoring telescopic device's stress, displacement, deflection, temperature and so on parameter and image information, can adapt to a plurality of complex environment, provide overall guarantee for the safe operation of equipment.

[0032] 3. The utility model discloses through adopting data fitting, pattern recognition and so on intelligent analysis technology, can automatically calculate vehicle gross weight, traffic, speed and so on parameter, improve the intelligent level of monitoring.

[0033] 4. The utility model discloses through when monitoring the abnormal situation, can send alarm signal in time, remind management personnel to intervene and handle, prevent the occurrence of the accident, can also provide remote monitoring and control function, convenient for user to grasp device state and carry out management at any time and anywhere. DRAWINGS

[0034] The drawings that form part of the utility model are used to provide further understanding to the utility model, and the illustrative embodiment of the utility model and its explanation are used to explain the utility model, and do not constitute improper limitation to the utility model.

[0035] Figure 1 It is the structure section view of expansion joint device of the utility model;

[0036] Figure 2 It is the sensor system arrangement bottom view of the utility model after removing the shear spring and anchoring device;

[0037] Figure 3 It is the expansion joint monitoring system frame schematic view of the utility model;

[0038] Figure 4 It is the first connecting device structure schematic view of the utility model;

[0039] Figure 5 It is the second connecting device structure schematic view of the utility model.

[0040] Drawing mark explanation:

[0041] 1, beam body;101, first beam body;102, second beam body;2, telescopic structure;3, sensor system;301, guy displacement sensor;302, stress strain sensor;303, vibration sensor;304, deflection sensor;305, top rod displacement sensor;306, temperature sensor;307, camera;4, data acquisition system;5, terminal data processing center;6, displacement stopper;7, first connecting device;701, fixed support;702, protective cover;8, second connecting device;801, sliding support;802, driving device;803, connecting support. DETAILED DESCRIPTION

[0042] In order to make the technical means and achieve the purpose and effect of the utility model easy to understand, the embodiments of the utility model are described in detail below in combination with specific drawings.

[0043] It should be noted that all the terms indicating directionality and positionality in the utility model, such as "up", "down", "left", "right", "front", "back", "vertical", "horizontal", "inner", "outer", "top", "low", "lateral", "longitudinal", "center", etc., are only used to explain the relative positional relationship, connection condition, etc. between components in a certain state, and are only for the convenience of describing the utility model, and thus cannot be understood as a limitation on the utility model. In addition, the description of "first", "second", etc. in the utility model is only for the purpose of description, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features.

[0044] In the description of the utility model, unless otherwise explicitly specified and limited, the terms "mounting", "connection" and "connection" should be understood broadly, for example, it can be fixed connection, or detachable connection, or integrally connected; it can be mechanical connection; it can be directly connected, or indirectly connected through an intermediate medium; it can be the communication inside two elements. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0045] In the description of the specification, the description of the terms "one embodiment", "some embodiments", "illustrative embodiment", "example", "specific example" or "some examples" means that the specific features, structures, materials or characteristics described in combination with the embodiment or example are included in at least one embodiment or example of the utility model. In the specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0046] As shown in Figures 1-3 The telescopic structure 2 adopts a standard bridge expansion joint design, including a middle beam, a cross beam, a shear spring, a displacement box and a rubber sealing strip, etc. components, for realizing the telescopic deformation of the bridge beam body 1 structure, and the telescopic structure 2 can be a steel type or a modular type, etc. various types of expansion joint devices.

[0047] The utility model discloses a telescopic joint device with monitoring function is arranged on the beam body 1, its characterized in that, including telescopic structure 2, sensor system 3, data acquisition system 4 and terminal data processing center 5, the beam body 1 includes first beam body 101 and second beam body 102, and telescopic structure 2 is arranged between first beam body 101 and second beam body 102, and sensor system 3 is arranged on the beam body 1 or telescopic structure 2, and sensor system 3 is connected data acquisition system 4, and data acquisition system 4 is connected terminal data processing center 5, and terminal data processing center 5 is used for real -time display the operation state of telescopic structure 2;

[0048] Sensor system 3 includes pull line displacement sensor 301, stress strain sensor 302, vibration sensor 303, deflection sensor 304, top rod displacement sensor 305, temperature sensor 306 and camera 307;

[0049] Pull line displacement sensor 301 is used for monitoring the overall stretching amount and compression amount of telescopic structure 2, stress strain sensor 302 is used for determining the stress state of telescopic structure 2, vibration sensor 303 is used for monitoring the vibration of telescopic structure 2 in the process of vehicle driving, deflection sensor 304 is used for monitoring the deflection change when telescopic structure 2 is stressed, top rod displacement sensor 305 is used for middle beam displacement uniformity monitoring, temperature sensor 306 is used for monitoring the temperature change around telescopic structure 2, and camera 307 is used for shooting the state of each component at the bottom of telescopic structure 2 and recording the image and time information of vehicle.

[0050] Through multiple sensors, various state parameters of telescopic structure 2 can be comprehensively monitored, including stretching amount, stress, vibration, deflection, displacement uniformity and temperature, and terminal data processing center 5 can display the operation state of telescopic device in real time, to help managers understand the working condition of the device in time, through real-time monitoring and data analysis, potential faults and problems can be found in advance, early warning is carried out, the risk of sudden accidents is reduced, and the root cause of the problem can be more accurately diagnosed in combination with the data of multiple sensors, maintenance efficiency is improved, camera 307 can record the image and time information of vehicle, which is helpful for monitoring the vehicle passing situation and guaranteeing traffic safety.

[0051] The setting realizes comprehensive and real-time monitoring of telescopic structure 2 by integrating multiple sensors and real-time data transmission processing systems, not only improves the safety of bridges and roads, but also improves the maintenance efficiency and management efficiency, and prolongs the service life of telescopic structure 2.

[0052] Specifically, pull line displacement sensor 301 includes a displacement sensor body and a pull line end, the displacement sensor body is arranged at the fixed end of the beam body 1 or the telescopic structure 2, and the pull line end is arranged at the movable end of the beam body 1 or the telescopic structure 2.

[0053] When the beam body 1 or the telescopic structure 2 is stretched, the end of the pull wire moves outward, the length of the pull wire increases, the displacement sensor body detects this change and records the stretching amount, when the beam body 1 or the telescopic structure 2 is compressed, the end of the pull wire moves inward, the length of the pull wire decreases, the displacement sensor body detects this change and records the compression amount. The displacement sensor body converts the detected displacement signal into an electrical signal and sends the data to the data acquisition system 4 through the data transmission interface, the data acquisition system 4 transmits the received data to the terminal data processing center 5 in real time, realizing real-time monitoring. By monitoring the stretching and compression of the telescopic structure 2 in real time, abnormal conditions such as excessive stretching or compression can be detected in time, so that early warning can be carried out, and when the detected displacement exceeds the normal range, the system can automatically issue an alarm to prompt maintenance personnel to check and repair.

[0054] The pull wire displacement sensor 301 has high resolution and can accurately measure small displacement changes, can work stably for a long time in harsh environmental conditions, is not affected by electromagnetic fields and other environmental factors, and ensures the accuracy of the data.

[0055] Specifically, the stress-strain sensor 302 is fixed on the bottom of the telescopic structure 2 by bolts or adhesives.

[0056] The stress-strain sensor 302 is fixed on the bottom of the telescopic structure 2 by bolts. The bolt fixing method is firm and reliable, and is convenient for installation and removal. The stress-strain sensor 302 is fixed on the bottom of the telescopic structure 2 by using special adhesives. The adhesive fixing method is suitable for surfaces that are difficult to fix with bolts, and has good fixing effect. The stress-strain sensor 302 can monitor the strain change of the telescopic structure 2 during use, provide accurate strain data, understand the deformation of the device, evaluate the stability of the structure, and predict the service life.

[0057] The stress-strain sensor 302 is fixed on the bottom of the telescopic structure 2 by bolts or adhesives, especially at the welded weak points or stress concentration points of the middle beam or the side beam, and has the advantages of high precision, reliability, flexibility and real-time performance. By monitoring the stress and strain changes, potential problems can be found and handled in time, improving the safety and reliability of the device.

[0058] Preferably, the stress-strain sensor 302 is arranged at the welded weak points or stress concentration points of the middle beam or the side beam.

[0059] The stress-strain sensor 302 is installed at the welded weak points or stress concentration points of the middle beam or the side beam, and by monitoring the stress distribution of the middle beam or the side beam, the stress state of the entire device can be understood, and the health status of the structure can be evaluated. These positions are usually the most prone to problems in the structure, and it is particularly important to monitor the stress and strain changes of these positions.

[0060] Specifically, the vibration sensor 303 is attached to the bottom of the telescopic structure 2 by a magnetic base.

[0061] The vibration sensor 303 is attached to the bottom of the telescopic structure 2 by a magnetic base, which makes the installation of the vibration sensor 303 very fast without the need for complex fixing devices, and provides stable suction force to ensure that the vibration sensor 303 will not fall off during use, with the advantages of convenient installation, high reliability, strong flexibility and real-time performance.

[0062] Specifically, the deflection sensor 304 is arranged at the top of the pier.

[0063] The deflection sensor 304 is installed at the top of the pier, which is a key support point of the bridge or structure, and can be monitored by bolts, adhesives or other fixing devices. By monitoring the deflection change of the telescopic structure 2, the deformation of the entire structure can be understood, and the stability of the structure can be evaluated.

[0064] Specifically, the mid-beam displacement uniformity monitoring device includes a displacement block 6 and a top rod displacement sensor 305, the top rod displacement sensor 305 is arranged between the displacement block 6 and the adjacent mid-beam, and the displacement block 6 and the top rod displacement sensor 305 are fixed on the mid-beam of the telescopic structure 2 by bolts or adhesives.

[0065] The displacement block 6 is fixed between the mid-beams of the telescopic device, usually at both ends of the mid-beam or at the key support points. The displacement block 6 is used to limit the displacement range of the mid-beam and provide a fixed reference point for the top rod displacement sensor 305 to measure displacement; the top rod displacement sensor 305 is installed near the displacement block 6 and monitors the displacement change of the mid-beam by contacting the mid-beam to provide accurate displacement data.

[0066] By installing displacement blocks 6 and top rod displacement sensors 305 at multiple positions of the mid-beam, the uniformity of the mid-beam displacement can be monitored to ensure that the displacement of the mid-beam at different positions is consistent. At the same time, the displacement change of the mid-beam under different load conditions can be monitored to evaluate the load-carrying capacity of the structure and timely detect potential structural problems. When the detected displacement exceeds the set threshold, the system can automatically issue an alarm to prompt maintenance personnel to check and repair.

[0067] Specifically, the temperature sensor 306 is fixed on both ends of the telescopic structure 2 by bolts.

[0068] The temperature sensor 306 can monitor the temperature change at both ends of the telescopic structure 2 in real time, monitor the temperature distribution of the telescopic structure 2, understand the temperature condition of the entire device, provide accurate temperature data, evaluate the thermal stress state of the telescopic structure 2, prevent damage caused by thermal stress, and help evaluate the telescopic amount of the telescopic structure 2 to ensure its normal work.

[0069] Specifically, at least two cameras 307 are installed below the telescopic structure 2 and on the bridge deck respectively. The camera 307 is connected to the upper surface of the beam 1 via a first connecting device 7 , and the camera 307 is connected to the telescopic structure 2 via a second connecting device 8 .

[0070] The camera 307 installed below the telescopic structure 2 can monitor the structural status of the bottom of the telescopic structure 2, such as welding points and connectors, to ensure the integrity of these key parts; the camera 307 installed on the bridge deck can monitor the traffic conditions on the bridge deck and record the images and time information of passing vehicles, which is helpful for traffic management and accident investigation.

[0071] The two cameras 307 capture the status of the telescopic structure 2 from different angles, providing multi-view monitoring to ensure there are no blind spots. The information provided by the lower camera 307 and the bridge deck camera 307 can complement each other to improve the accuracy and comprehensiveness of monitoring.

[0072] This setup can achieve comprehensive, multi-perspective real-time monitoring, improve the accuracy and comprehensiveness of monitoring, and ensure the safety of the structure and the effectiveness of traffic management.

[0073] like Figure 4 As shown, specifically, the first connecting device 7 includes a fixing bracket 701 and a protective cover 702 . The fixing bracket 701 is used to install the fixed camera 307 , and the protective cover 702 is used to prevent rain and snow from affecting the operation of the camera 307 .

[0074] The fixed bracket 701 is used to firmly mount the camera 307 on the upper surface of the beam body 1 to ensure that the camera 307 works stably under various environmental conditions. The fixed bracket 701 is usually designed to be adjustable, and the angle of the camera 307 can be adjusted as needed to ensure the best shooting effect. The fixed bracket 701 is usually made of high-strength material with good corrosion resistance and aging resistance to ensure long-term use.

[0075] The protective cover 702 can effectively prevent the impact of weather conditions such as rain and snow on the camera 307, ensuring that the camera 307 can still work normally in bad weather. It can also prevent dust from entering the interior of the camera 307, keep the lens clean, and ensure image quality. At the same time, the protective cover 702 usually has a sun protection function, which can reduce the impact of direct sunlight on the camera 307, extend the service life of the camera 307, and prevent external impacts from damaging the camera 307.

[0076] This arrangement ensures stable operation and image quality of the camera 307 under various environmental conditions, provides reliable protection, extends service life, and makes installation and maintenance more convenient.

[0077] like Figure 5As shown, specifically, the second connecting device 8 comprises a sliding support 801, a driving device 802 and a connecting support 803, the sliding support 801 is arranged on the side of the first beam body 101, the connecting support 803 and the sliding support 801 form a sliding connection structure, the driving device 802 is used for driving the connecting support 803 to move, and the connecting support 803 is used for connecting the camera 307.

[0078] The sliding support 801 is arranged on the side of the first beam body 101, and provides a stable sliding platform. The sliding support 801 and the connecting support 803 form a sliding connection structure, so that the connecting support 803 can smoothly move along the sliding support 801. The sliding support 801 is usually made of high-strength material, has good corrosion resistance and aging resistance, and can ensure long-term use.

[0079] The driving device 802 is used for driving the connecting support 803 to move, and can adjust the position of the camera 307 as needed. The driving device 802 can be electrically driven, pneumatically driven or hydraulically driven, realizes automatic adjustment, improves work efficiency, usually has precise control function, can realize fine adjustment, and ensures the shooting angle and position of the camera 307 are accurate.

[0080] The connecting support 803 is used for connecting the camera 307, ensures that the camera 307 is firmly installed on the sliding support 801, and forms a sliding connection structure with the sliding support 801. The connecting support 803 can smoothly move along the sliding support 801. The connecting support 803 is usually designed to be adjustable, can adjust the angle of the camera 307 as needed, and ensures the best shooting effect.

[0081] The combination of the sliding support 801 and the driving device 802 can realize the position adjustment of the camera 307, ensures that the camera 307 can effectively shoot at different positions, realizes automatic control, automatically adjusts the position of the camera 307 as needed, improves work efficiency, and can stably work in various environmental conditions, avoids loosening caused by vibration or wind, has high flexibility and stability.

[0082] Specifically, the data acquisition system 4 comprises a data acquisition module and a preprocessing module, wherein: the data acquisition module is used for receiving data of each sensor, and the preprocessing module is used for preliminarily comparing and analyzing the transmitted data and recording image and time information of the vehicle.

[0083] The data acquisition module can simultaneously receive data from multiple sensors, realize comprehensive monitoring of multiple parameters, and ensure the timeliness of the data; the preprocessing module can filter the collected data, remove noise, improve the accuracy of the data, and store the processed data locally or in the cloud to ensure the integrity and traceability of the data, facilitating subsequent audits and analysis. At the same time, it can also extract the image data transmitted by camera 307 and record the image and time information of the vehicle.

[0084] The data acquisition system 4 is electrically connected to the sensor system 3 and is responsible for real-time acquisition of data signals output by the sensor system 3 and converting them into digital signals for storage and transmission.

[0085] Specifically, the data acquisition system 4 is connected to the sensor system 3 through wired methods such as field bus and network communication or wireless methods such as Lora, and transmits the data to the data acquisition module to achieve real-time monitoring of parameters such as displacement, strain, temperature and vibration of the bridge expansion joint.

[0086] This setting ensures the stability and reliability of data transmission through fieldbus and network communication. It also achieves long-distance, low-power data transmission through wireless methods such as LoRa, making it suitable for monitoring in complex environments.

[0087] Specifically, after the pre-processing module finds that the monitoring data exceeds a set threshold, the pre-processing module will trigger the vehicle data calculation module and the camera 307 to record the image and time information of the vehicle.

[0088] When the monitoring data exceeds the set threshold, the pre-processing module will immediately trigger the vehicle data calculation module and camera 307 to record relevant data, provide early warning, notify maintenance personnel to conduct inspection and repair, record the vehicle's image and time information, and provide intuitive visual evidence.

[0089] Specifically, the terminal data processing center 5 receives data and image information from the preprocessing module, calculates parameters such as vehicle gross weight, vehicle flow, and vehicle speed through technical means such as data fitting and pattern recognition, and displays the operating status of the telescopic structure 2 in real time.

[0090] It can be divided into the following steps:

[0091] S1: data reception and preprocessing;

[0092] S11: Select an appropriate communication protocol (such as TCP / IP, MQTT, etc.) to receive data and image information from the pre-processing module to ensure a unified data format for subsequent processing;

[0093] S12: Remove noise and outliers to ensure data accuracy and convert received data into a format suitable for processing;

[0094] S2: Data fitting and pattern recognition;

[0095] S21: For fitting linear relationships, such as the relationship between vehicle speed and traffic volume, for fitting non-linear relationships, such as the relationship between vehicle gross weight and vehicle type, for fitting complex relationships, such as non-linear relationships between multiple variables;

[0096] S22: Using deep learning techniques such as convolutional neural networks (CNN) to identify vehicle types, license plate numbers, etc., extracting key features in images such as vehicle outlines, colors, etc., using algorithms such as support vector machines (SVM), decision trees, etc. to classify vehicles;

[0097] S3: Parameter calculation;

[0098] S31: Combined with pressure sensor data when the vehicle passes, calculate the vehicle gross weight, identify the vehicle type through image recognition technology, and estimate the vehicle gross weight combined with the vehicle type database;

[0099] S32: Counter: Using image recognition technology, count the number of vehicles passing through the monitoring area per unit time, combined with geomagnetic sensor, infrared sensor, etc. Data to assist in the calculation of traffic volume.

[0100] S33: Calculate the speed of the vehicle by calculating the time difference between the two detection points, use image processing techniques such as optical flow to calculate the motion speed of the vehicle;

[0101] S4: Real-time display of the running state of the telescopic device;

[0102] S41: Use displacement sensors, pressure sensors, etc. to monitor the running state of the telescopic device, real-time acquisition of displacement, pressure, etc. Data of telescopic device

[0103] S41: Develop a graphical user interface (GUI) to display the running state of the telescopic device in real time, set thresholds, and trigger alarms when the running state of the telescopic device exceeds the normal range.

[0104] Through data fitting recognition technology, the collected raw data is converted into useful information, identifying the type, speed, weight, etc. Characteristics of the vehicle, calculating the influence of the total weight, speed, etc. Factors of the vehicle on the telescopic structure 2, and assisting in finding the cause of exceeding the threshold.

[0105] Specifically, the terminal data processing center 5 also includes a remote monitoring function module for management personnel to view the expansion joint state in real time through mobile devices.

[0106] The manager can view the running state of the expansion joint 2 in real time through a mobile device such as a smart phone, a tablet computer and the like, and can also view historical data and alarm records to understand the historical running condition of the expansion joint 2 and to perform fault analysis and prevention.

[0107] Specifically, the terminal data processing center 5 further includes an alarm module for pushing an abnormal message to a customer through a client or a mobile APP.

[0108] When an abnormal condition is detected, the terminal data processing center 5 can immediately send an alarm notification through a mobile device to remind the manager to take timely measures and to improve the maintenance efficiency.

[0109] Embodiment 1

[0110] Referring to Figures 1-3 As shown in the figure, the expansion joint device with the monitoring function of the application comprises a beam body 1 expansion joint 2, a sensor system 3, a data acquisition system 4, a terminal data processing center 5 and a displacement block 6 and the like module composition. The expansion joint 2 in the embodiment is arranged between the beam bodies 1 on both sides, and the expansion joint 2 comprises a steel type and a modular expansion joint, which meets the bridge expansion requirement. The sensor system 3 is arranged at each monitoring point of the expansion joint 2, wherein the sensor system 3 mainly comprises a wire displacement sensor 301, a stress strain sensor 302, a vibration sensor 303, a deflection sensor 304, a top rod displacement sensor 305, a temperature sensor 306 and a camera 307 and the like monitoring equipment.

[0111] In the operation state monitoring process of the telescopic structure 2, the wire displacement sensor 301 is arranged on both sides of the beam body 1, wherein the main body of the sensor is arranged on the fixed end of the beam body 1 or the telescopic structure 2, and the wire end of the sensor is fixed with the beam body 1 or the movable end of the telescopic device, for monitoring the overall stretching and compression of the telescopic device; the beam displacement uniformity monitoring device in the telescopic device mainly consists of a displacement block 6 and a top rod displacement sensor 305, which are respectively fixed between the middle beams in the telescopic device by bolts or adhesives; the stress and strain sensor 302 is fixed on the bottom of the telescopic structure 2 by bolts or adhesives, and is arranged at the weak welding position or stress concentration position of the middle beam or the side beam, so as to facilitate the judgment of the stress state of the device; the vibration sensor 303 is installed on the bottom of the telescopic structure 2 by a magnetic base, for monitoring the vibration of the telescopic device during vehicle driving; the deflection sensor 304 is installed on the top of the pier, which can be a contact type or a non-contact type, for monitoring the deflection change when the telescopic structure 2 is stressed; the temperature sensor 306 and the camera 307 are respectively installed around the telescopic structure 2, wherein the temperature sensor 306 is fixed on both ends of the telescopic structure 2 by bolts, for monitoring the temperature change around the device; the camera 307 is installed on the bottom of the telescopic structure 2 and the bridge deck, which is used to shoot the state of each component on the bottom of the telescopic structure 2, and record the image and time information of the vehicle when the monitoring data exceeds the set threshold.

[0112] The monitoring system of the telescopic structure 2 is shown in Figure 3 The data acquisition system 4 mainly consists of a data acquisition module and a preprocessing module, wherein the data acquisition system 4 is connected with the sensor system 3 through field bus, network communication and other wired ways or Lora and other wireless ways, transmits the data of each sensor to the data acquisition module 4, realizes real-time monitoring of the displacement, strain, temperature and vibration parameters of the bridge expansion joint, and performs preliminary comparative analysis on the transmitted data. When it is found that the monitoring data exceeds the set threshold, the preprocessing module triggers the vehicle data calculation module and the camera 307 to record the image and time information of the vehicle.

[0113] The terminal data processing center 5 receives the data and image information from the preprocessing module, calculates the total weight of the vehicle, the traffic flow, the vehicle speed and other parameters through data fitting, pattern recognition and other technical means, and displays the running state of the telescopic structure 2 in real time; at the same time, the device also supports remote monitoring function, and the management personnel can view the state of the expansion joint device in real time through the mobile device.

[0114] The expansion joint device with the monitoring function can be used for connecting two side beam bodies 1, has the functions of adjusting the displacement and deformation between structures caused by vehicle load, bridge building materials and environmental factors, and realizes real-time monitoring and early warning of the operation state of the expansion joint device through reasonable setting of a sensor system 3, a data acquisition module 4 and a terminal data processing center 5 and the like.

[0115] The above is only a preferred embodiment of the present application, and is not used to limit the present application, and any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application should be included in the protection scope of the present application.

Claims

1. An expansion joint device with a monitoring function, arranged on a beam body (1), characterized in that: The invention comprises a telescopic structure (2), a sensor system (3), a data acquisition system (4) and a terminal data processing center (5); the beam body (1) comprises a first beam body (101) and a second beam body (102); the telescopic structure (2) is arranged between the first beam body (101) and the second beam body (102); the sensor system (3) is arranged on the beam body (1) or the telescopic structure (2); the sensor system (3) is connected to the data acquisition system (4); the data acquisition system (4) is connected to the terminal data processing center (5); and the terminal data processing center (5) is used to display the operating status of the telescopic structure (2) in real time; The sensor system (3) comprises: A wire displacement sensor (301) is used to monitor the overall stretching and compression of the telescopic structure (2); A stress and strain sensor (302) is used to determine the stress state of the telescopic structure (2); A vibration sensor (303) is used to monitor the vibration of the telescopic structure (2) during the vehicle's travel; A deflection sensor (304) is used to monitor the deflection change of the telescopic structure (2) when it is under stress; A push rod displacement sensor (305) is used to monitor the uniformity of the center beam displacement of the telescopic structure (2); A temperature sensor (306) is used to monitor temperature changes around the telescopic structure (2); Camera (307): used to photograph the status of each component of the telescopic structure (2) and record images and time information of vehicles passing through the bridge deck.

2. The expansion joint device with monitoring function according to claim 1, characterized in that: The wire displacement sensor (301) comprises a displacement sensor body and a wire end, wherein the displacement sensor body is arranged at the fixed end of the telescopic structure (2) or the first beam (101), and the wire end is arranged at the movable end of the telescopic structure (2) or the second beam (102).

3. The expansion joint device with monitoring function according to claim 1, characterized in that: The stress and strain sensor (302) is fixed to a weak welding point of a center beam or a side beam of the telescopic structure (2), or a stress concentration point of the center beam or the side beam, by means of bolts or adhesives; The vibration sensor (303) is adsorbed on the bottom of the telescopic structure (2) via a magnetic base; The deflection sensor (304) is arranged on the top of the pier of the beam body (1); The temperature sensor (306) is fixed to both ends of the telescopic structure (2) along the vehicle's travel direction by means of bolts.

4. The expansion joint device with monitoring function according to claim 1, characterized in that: It also includes a displacement block (6), wherein a plurality of the displacement blocks (6) are sequentially arranged on a plurality of center beams of the telescopic structure (2) along the vehicle's travel direction and perpendicular to the vehicle's travel direction, and the push rod displacement sensor (305) is arranged between the displacement block (6) and the adjacent center beam.

5. The expansion joint device with monitoring function according to claim 1, characterized in that: At least two cameras (307) are respectively installed below the telescopic structure (2) and on the bridge deck; the cameras (307) are connected to the upper surface of the beam body (1) via a first connecting device (7); and the cameras (307) are connected to the telescopic structure (2) via a second connecting device (8).

6. The expansion joint device with monitoring function according to claim 5, characterized in that: The first connecting device (7) comprises a fixing bracket (701) and a protective cover (702), wherein the fixing bracket (701) is used to install and fix the camera (307), and the protective cover (702) is used to prevent rain and snow from affecting the operation of the camera (307).

7. The expansion joint device with monitoring function according to claim 5, characterized in that: The second connecting device (8) includes a sliding support (801), a driving device (802) and a connecting support (803); the sliding support (801) is arranged on the side of the first beam body (101); the connecting support (803) and the sliding support (801) form a sliding connection structure; the driving device (802) is used to drive the connecting support (803) to move; and the connecting support (803) is used to connect to the camera (307).

8. The expansion joint device with monitoring function according to claim 1, characterized in that: The data acquisition system (4) includes a data acquisition module and a pre-processing module. The data acquisition module is used to receive data from various sensors. The pre-processing module is used to perform preliminary comparative analysis on the transmitted data. The pre-processing module is connected to the vehicle data calculation module and the camera (307) to record images and time information of vehicles passing through the bridge deck.

9. The expansion joint device with monitoring function according to claim 8, characterized in that: The terminal data processing center (5) also includes a remote monitoring function module for management personnel to view the status of the expansion joint in real time.

10. The expansion joint device with monitoring function according to claim 8, characterized in that: The terminal data processing center (5) also includes an alarm module for pushing abnormal messages to management personnel through a client or a mobile APP.

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