A smart sensor for monitoring bridge deformation

Abstract

This invention relates to an intelligent sensor for monitoring bridge deformation in the field of bridge monitoring. It includes multiple intelligent sensor modules fixedly connected to the lower end of the bridge structure. Each intelligent sensor module comprises an intelligent sensor body, a detection housing, a detection unit, an electromagnetic ring, a magnetic ring, and, as described in this application, the detection unit detects the working status of the intelligent sensor body. The energized electromagnetic ring creates a magnetic attraction force on the magnetic ring, overcoming the pressure generated by the deformation of the compression spring, causing the detection unit to move upwards until its upper end contacts the intelligent sensor body. The detection unit continues to apply pressure to the intelligent sensor body, causing deformation of the contact surface between the functional part and the bridge structure, thereby affecting the data current of the intelligent sensor body. This enables the detection of the working status of the intelligent sensor body, timely identification of faulty intelligent sensor bodies, and prompt maintenance.

Description

TECHNICAL FIELD

[0001] The intelligent sensor relates to the field of bridge monitoring. BACKGROUND

[0002] Bridge deformation monitoring is a key technical means to ensure the safety of bridge structures, assess their health status, and prevent potential risks. It can timely detect abnormal deformation and avoid structural failure or collapse. It can also quantify the long-term performance changes of bridges under load, environmental factors, etc., verify whether the design and construction meet the expected requirements, and provide data support for maintenance, reinforcement, or replacement.

[0003] The soft sensor parallel device for measuring deformation disclosed in the specification of invention patent CN202210621375.4 encloses the soft sensor inside a sealed telescopic connector, which can monitor bearing deformation from six degrees of freedom while protecting the soft sensor from external influences. It can measure the dynamic behavior of bearings during normal and peak periods of vehicle operation in real time, obtain displacement data of damaged bearings, and serve as an important basis for evaluating and replacing bearings. It replaces manual detection operations, reduces maintenance time and human error rates, and greatly reduces the potential risks of workers during maintenance.

[0004] The specification of invention patent CN202310129715.6 discloses a bridge overall stability analysis method. Displacement monitoring sensors and temperature sensors are installed on the piers of the bridge. According to the temperature and displacement measurement results under no load conditions, the statistical relationship between displacement and temperature is obtained using the least squares method, and then the measured displacement under load is corrected for temperature effects to obtain dynamic displacement. Based on this, the load imbalance deviation is obtained. The overall stability of the bridge is determined according to the load imbalance deviation, solving the difficulty of bridge overall stability analysis.

[0005] In the prior art, the main improvement direction of bridge deformation sensors is to reduce the influence of external environment and manual operation on detection results and increase detection accuracy. In actual detection process, multiple sensors need to be set at corresponding positions of the bridge for work. Although there are multiple sensors, their main objects are different and cannot be timely detected by other sensor data. Once a sensor failure occurs, it can easily cause significant impact on bridge work. SUMMARY

[0006] In view of the above prior art, the technical problem to be solved by the present application is that a sensor failure cannot be timely detected by other sensor data. Once a sensor failure occurs, it can easily cause significant impact on bridge work.

[0007] In order to solve the above problems, the application provides an intelligent sensor for bridge deformation monitoring, which comprises a plurality of intelligent sensor modules fixedly connected to the lower end of a bridge body, each of the plurality of intelligent sensor modules comprises an intelligent sensor body and a detection shell matched with each other, the intelligent sensor body and the detection shell are respectively bonded to the lower end of the bridge body by glue, and the detection shell is sleeved on the lower end of the intelligent sensor body, the detection shell comprises a shell, a movable groove is formed in the lower end of the shell, a detection unit is inserted into the movable groove, one end of the detection unit penetrates through the shell and extends into the shell, a compression spring is fixed between the detection unit and the groove bottom plate of the movable groove, and an electromagnetic ring and a magnetic ring matched in position are respectively fixedly connected to the groove bottom plate of the movable groove and the detection unit.

[0008] The intelligent sensor body comprises a functional part, a detection part is fixedly connected to the upper end of the functional part, and the detection part is in close contact with the bridge body, a connecting part is formed in the side wall of the functional part, and a communication groove is formed in the side wall of the shell, and the connecting part penetrates through the communication groove.

[0009] In the intelligent sensor for bridge deformation monitoring, the working state of the intelligent sensor body can be detected, and the intelligent sensor body with faults can be found in time for timely maintenance.

[0010] As a further improvement of the application, the upper end of the detection unit is fixedly connected with an elastic capsule, and a plurality of filling balls are filled in the elastic capsule. The impact of the plurality of elastic capsules on the detection unit during the detection of the working state of the detection unit is greatly reduced, and the possibility of damage to the intelligent sensor body is reduced.

[0011] As a further improvement of the application, the sum of the volumes of the plurality of filling balls is nine tenths of the volume of the cavity in the elastic capsule, and lubricating oil is filled in the elastic capsule. The deformation amount of the elastic capsule when it plays a buffering role is reduced, so that the detection unit can better exert pressure on the intelligent sensor body. The existence of the lubricating oil can greatly reduce the wear caused by the impact of the filling balls when they play a buffering role, so that the filling balls are not easily worn out and the buffering effect of the filling balls is not easily affected.

[0012] As a further improvement of the application, a dust plug is inserted into the communication groove, the dust plug is matched with the communication groove and the connecting part in shape, and the dust plug is interference-fitted with the communication groove, so that the working environment of the intelligent sensor body is easily maintained, and the influence of the external environment on the working state of the intelligent sensor body is reduced.

[0013] As another improvement of the application, a connecting column is fixedly connected between the side of the lower part of the detection unit close to the groove bottom plate of the movable groove and the groove bottom plate of the movable groove, and prefabricated grooves are formed in the two ends of the connecting column. The detection unit is fixed in the movable groove and the shell as a whole by the connecting column, so that the transportation and storage of the detection shell as a whole are facilitated.

[0014] As a further improvement of the present application, a storage groove is excavated on the end side wall of the shell away from the communication groove, a trigger unit is fixedly connected on the groove bottom plate of the storage groove, a data storage unit is fixedly connected on the end of the trigger unit away from the groove bottom plate of the storage groove, the overall density of the data storage unit is less than the density of liquid water, a signal sending device is carried on the data storage unit, the data storage unit is signal connected with the intelligent sensor main body, a locking ring matched with the data storage unit is fixedly connected at the opening of the shell, the detected data before the collapse of the bridge main body is saved, the monitoring data sample is reserved for the future bridge monitoring, and the accuracy of the intelligent sensor detection is increased.

[0015] As a further improvement of the present application, the data storage unit includes a storage part, protection part one and protection part two are fixedly connected at both ends of the storage part respectively, and the center of gravity of the storage part is close to the side of the protection part two, the thickness of the protection part two is greater than that of the protection part one, a plurality of elastic fins are fixedly connected on the side wall of the storage part, the protection effect on the data storage unit is increased, and the data storage unit is not easy to be damaged and fail.

[0016] In summary, the working state of the intelligent sensor main body is detected by the detection unit, the energized electromagnetic ring will form a magnetic attraction force on the magnetic ring, and overcome the pressure generated by the compression spring deformation, so that the detection unit as a whole moves upward until the upper end of the detection unit contacts the intelligent sensor main body, and the detection unit continues to exert pressure on the intelligent sensor main body, so that the contact surface of the function part and the bridge main body is deformed, and then the data current of the intelligent sensor main body is affected, the working state of the intelligent sensor main body is detected, the faulty intelligent sensor main body is found in time, and maintenance treatment is carried out in time.

[0017] Meanwhile, the data storage unit is additionally provided, which can store the data detected by the intelligent sensor main body in real time, when the intelligent sensor main body has the risk of damage due to the collapse of the bridge, the data storage unit is ejected from the storage groove to below the bridge, under the action of the water flow, away from the possible bridge collapse area, the data detected before the collapse of the bridge main body is saved, the monitoring data sample is reserved for the future bridge monitoring, and the accuracy of the intelligent sensor detection is increased. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 The structure schematic view of the intelligent sensor module of the first embodiment of the present application installed on the bridge;

[0019] Figure 2 The structure schematic view of the intelligent sensor module of the first embodiment of the present application in standby state;

[0020] Figure 3 The front view of the intelligent sensor module of the first embodiment of the present application in working state;

[0021] Figure 4 for Figure 3 Schematic diagram of the structure at point A;

[0022] Figure 5 This is a front cross-sectional view of the smart sensor module in standby state according to the first embodiment of this application;

[0023] Figure 6 for Figure 5 Schematic diagram of the structure at point B;

[0024] Figure 7 This is a schematic diagram of the structure of the smart sensor body according to the first embodiment of this application;

[0025] Figure 8 This is a schematic diagram illustrating the changes in the working state of the intelligent sensor module according to the first embodiment of this application;

[0026] Figure 9 This is a schematic diagram of the intelligent sensor module in standby state according to the second embodiment of this application;

[0027] Figure 10 This is a front cross-sectional view of the smart sensor module in standby mode according to the second embodiment of this application;

[0028] Figure 11 for Figure 10 Schematic diagram of the structure at point C;

[0029] Figure 12 This is a schematic diagram of the data storage unit according to the second embodiment of this application.

[0030] Explanation of the labels in the diagram:

[0031] 1. Bridge main body; 2. Intelligent sensor main body; 201. Functional part; 202. Detection part; 203. Connecting part; 3. Detection shell; 301. Housing; 302. Movable groove; 303. Storage groove; 4. Dust plug; 5. Detection unit; 6. Compression spring; 7. Connecting column; 8. Magnetic ring; 9. Electromagnetic ring; 10. Elastic bladder; 11. Filling ball; 12. Data storage unit; 1201. Storage part; 1202. Elastic fin; 1203. Protection part one; 1204. Protection part two; 13. Triggering unit; 14. Locking ring. Detailed Implementation

[0032] The two embodiments of this application will be described in detail below with reference to the accompanying drawings.

[0033] First implementation method:

[0034] Figures 1-4This invention illustrates an intelligent sensor for monitoring bridge deformation, comprising multiple intelligent sensor modules fixedly connected to the lower end of a bridge body 1. Each intelligent sensor module includes a matching intelligent sensor body 2 and a detection housing 3. The intelligent sensor body 2 and the detection housing 3 are respectively glued to the lower end of the bridge body 1, and the detection housing 3 is fitted onto the lower end of the intelligent sensor body 2. The detection housing 3 includes a shell 301, and a movable groove 302 is carved at the lower end of the shell 301. A detection unit 5 is inserted into the movable groove 302. One end of the detection unit 5 passes through the shell 301 and extends into the shell 301. A compression spring 6 is fixed between the detection unit 5 and the bottom plate of the movable groove 302. An electromagnetic ring 9 and a magnetic ring 8 with matching positions are fixedly connected to the bottom plate of the movable groove 302 and the detection unit 5, respectively.

[0035] Please see Figure 7 The intelligent sensor body 2 includes a functional part 201. A detection part 202 is fixedly connected to the upper end of the functional part 201, and the detection part 202 is close to the bridge body 1. A connecting part 203 is carved into the side wall of the functional part 201. A communication groove is carved into the side wall of the housing 301, and the connecting part 203 passes through the communication groove.

[0036] In this embodiment, the intelligent sensor body 2 is a strain gauge pressure sensor. When the bridge body 1 deforms, it will compress the functional part 201, causing the functional part 201 to deform, which in turn affects the data current of the intelligent sensor body 2, thereby realizing the detection of the deformation of the bridge body 1.

[0037] The detection unit 5 can be used to detect the working status of the intelligent sensor body 2. The energized electromagnetic ring 9 will form a magnetic attraction force on the magnetic ring 8 and overcome the pressure generated by the deformation of the compression spring 6, causing the detection unit 5 to move upward as a whole until the upper end of the detection unit 5 contacts the intelligent sensor body 2. The detection unit 5 continues to apply pressure to the intelligent sensor body 2, causing the contact surface between the functional part 201 and the bridge body 1 to deform, thereby affecting the data current of the intelligent sensor body 2. This enables the detection of the working status of the intelligent sensor body 2, timely detection of faulty intelligent sensor bodies 2, and timely maintenance.

[0038] An elastic bladder 10 is fixedly connected to the upper end of the detection unit 5. The elastic bladder 10 is filled with multiple filling balls 11. The impact of the multiple elastic bladders 10 significantly reduces the impact of the detection unit 5 on the intelligent sensor body 2 during the detection process, reducing the possibility of damage to the intelligent sensor body 2. The sum of the volumes of the multiple filling balls 11 is nine-tenths of the volume of the cavity inside the elastic bladder 10. The elastic bladder 10 is filled with lubricating oil, which reduces the deformation of the elastic bladder 10 when it plays a buffering role, allowing the detection unit 5 to better apply pressure to the intelligent sensor body 2. The presence of lubricating oil can significantly reduce the wear caused by the impact of the filling balls 11 when they play a buffering role, making it less likely to cause excessive wear of the filling balls 11 and less likely to affect the buffering effect of the filling balls 11.

[0039] A dust plug 4 is inserted into the communication slot. The shape of the dust plug 4 matches the communication slot and the connecting part 203. The dust plug 4 is interference-fitted with the communication slot, which makes it easy to maintain the working environment of the smart sensor body 2 and reduces the impact of the external environment on the working state of the smart sensor body 2.

[0040] Please see Figures 5-6 A connecting post 7 is fixedly connected between the lower part of the detection unit 5, near the bottom plate of the movable groove 302, and the bottom plate of the movable groove 302. Pre-cut grooves are carved at both ends of the connecting post 7. When the intelligent sensor module is in standby mode, the connecting post 7 secures the detection unit 5 entirely within the movable groove 302 and the housing 301, facilitating the overall transportation and storage of the detection housing 3. When the intelligent sensor module is switched to working mode, please refer to... Figure 8 By pressing the detection unit 5 as a whole toward the intelligent sensor body 2, the multiple connecting columns 7 break along the two pre-made grooves, releasing the fixation between the detection unit 5 and the detection housing 3. Under the action of the compression spring 6 in a compressed state, the detection unit 5 moves away from the detection housing 3 and turns into a working state, which can periodically detect the intelligent sensor body 2.

[0041] In this application, the cooperation of magnetic ring 8 and electromagnetic ring 9 enables the detection unit 5 to press the intelligent sensor body 2, thereby detecting the working status of the intelligent sensor body 2 and realizing the purpose of timely detection of faulty intelligent sensor body 2 and timely maintenance. In particular, the detection of intelligent sensor body 2 is periodic, and the detection of intelligent sensor body 2 is preferably carried out during the late night and early morning when there is less traffic and pedestrian flow, so as to reduce the impact of external environmental factors on the detection structure and increase the accuracy of the detection results.

[0042] Second implementation method:

[0043] Figures 9-11A smart sensor for bridge deformation monitoring is shown. A storage slot 303 is carved into the side wall of the housing 301 away from the communication slot. A trigger unit 13 is fixedly connected to the bottom plate of the storage slot 303. A data storage unit 12 is fixedly connected to the end of the trigger unit 13 away from the bottom plate of the storage slot 303. The density of the data storage unit 12 is less than that of liquid water. A signal transmitting device is mounted on the data storage unit 12. The data storage unit 12 is signal connected to the smart sensor body 2. A locking ring 14 matching the data storage unit 12 is fixedly connected to the opening of the housing 301.

[0044] Specifically, in this embodiment, the detection data from the functional unit 201 is initially processed by the detection unit 202 and then transmitted to the processing terminal via the connection unit 203 and the transmission line. The processing terminal processes and stores the data, and performs early warning and routine maintenance. At the same time, the detection data is transmitted wirelessly from the smart sensor body 2 to the data storage unit 12 and temporarily stored in the data storage unit 12. The data storage capacity in the data storage unit 12 is the amount of data generated by the smart sensor body 2 in one maintenance cycle. When the data storage unit 12 is full, the newly stored data will overwrite the original data.

[0045] The structure and function of the trigger unit 13 are similar to those of a vehicle airbag. When the main body of the bridge 1 bends to a preset degree and there is a risk of it breaking and burying the main body of the smart sensor 2 and the detection housing 3, the transmission line on which the data transmission of the connecting part 203 depends breaks and fails. The trigger unit 13 is triggered to quickly generate an airbag, which pushes the data storage unit 12 out of the storage tank 303 and shoots it under the bridge. Under the action of the water flow, it moves away from the possible bridge collapse area and saves the data detected before the main body of the bridge 1 collapses. This preserves the monitoring data sample for future bridge monitoring and increases the accuracy of the smart sensor detection. The data storage unit 12, which is carried away by the water flow, can quickly locate the approximate range according to the flow time and water flow speed, and quickly recover the signal generated by the signal transmitting device on the data storage unit 12.

[0046] Please see Figure 12The data storage unit 12 includes a storage section 1201, which is waterproof. A first protective section 1203 and a second protective section 1204 are fixedly connected to both ends of the storage section 1201, respectively. The center of gravity of the storage section 1201 is closer to the second protective section 1204. The thickness of the second protective section 1204 is greater than that of the first protective section 1203. Multiple elastic fins 1202 are fixedly connected to the side wall of the storage section 1201. After the data storage unit 12 is ejected, due to the distribution of its own center of gravity, the end connected to the second protective section 1204 is more likely to face downwards. This ensures that when the data storage unit 12 collides with other hard objects, the second protective section 1204, which has the best protective performance, will directly contact the hard object, increasing the protection effect of the data storage unit 12 and making it less prone to damage or failure.

[0047] In this embodiment, compared to the first embodiment, a data storage unit 12 is added, which can store the data detected by the intelligent sensor body 2 in real time. When the intelligent sensor body 2 is at risk of being damaged due to the bridge collapse, the data storage unit 12 is ejected from the storage tank 303 to the area under the bridge. Under the action of the water flow, it moves away from the possible bridge collapse area and saves the data detected before the bridge body 1 collapses. This preserves the monitoring data samples for future bridge monitoring and increases the accuracy of intelligent sensor detection.

[0048] In particular, for ease of illustration, the various structures in the accompanying drawings of this application are not drawn to scale or arranged according to actual conditions. Figure 1 The dimensions of the main body 1 of the bridge and the layout of the intelligent sensor module (which should be placed at the location required for monitoring, rather than arranged in an array) can be reasonably designed and laid out by those skilled in the art based on the actual situation. Meanwhile, the housing 301 of this application carries an energy storage unit for powering the electrical structures within the intelligent sensor module. The power supply method and wiring method are well-known technologies to those skilled in the art, and therefore are not disclosed in detail in this application.

[0049] In light of current practical needs, the above-described embodiments adopted in this application are not limited to these. Any changes made within the scope of knowledge possessed by those skilled in the art without departing from the concept of this application still fall within the protection scope of this invention.

Claims

1. An intelligent sensor for bridge deformation monitoring, comprising a plurality of intelligent sensor modules fixedly connected at the lower end of a bridge body (1), characterized in that: The plurality of intelligent sensor modules each comprise a mutually matched intelligent sensor body (2) and a detection shell (3), the intelligent sensor body (2) and the detection shell (3) are respectively bonded at the lower end of the bridge body (1) by glue, and the detection shell (3) is sleeved at the lower end of the intelligent sensor body (2), the detection shell (3) comprises a shell (301), the lower end of the shell (301) is drilled with a movable groove (302), a detection unit (5) is inserted in the movable groove (302), one end of the detection unit (5) penetrates through the shell (301) and extends into the shell (301), a compression spring (6) is fixed between the detection unit (5) and the groove bottom plate of the movable groove (302), and the groove bottom plate of the movable groove (302) and the detection unit (5) are respectively fixedly connected with an electromagnetic ring (9) and a magnetic ring (8) matched in position; The intelligent sensor body (2) comprises a functional part (201), the upper end of the functional part (201) is fixedly connected with a detection part (202), and the detection part (202) is close to the bridge body (1), a connecting part (203) is drilled in the side wall of the functional part (201), and a communication groove is drilled in the side wall of the shell (301).

2. The intelligent sensor for bridge deformation monitoring according to claim 1, characterized in that: The upper end of the detection unit (5) is fixedly connected with an elastic bag (10), and the elastic bag (10) is filled with a plurality of filling balls (11).

3. The intelligent sensor for bridge deformation monitoring according to claim 2, characterized in that: The sum of the volumes of the plurality of filling balls (11) is nine tenths of the volume of the cavity in the elastic bag (10), and the elastic bag (10) is filled with lubricating oil.

4. The intelligent sensor for bridge deformation monitoring according to claim 1, characterized in that: A dustproof plug (4) is inserted in the communication groove, the dustproof plug (4) is matched in shape with the communication groove and the connecting part (203), and the dustproof plug (4) is in interference fit with the communication groove.

5. The intelligent sensor for bridge deformation monitoring according to claim 1, characterized in that: A connecting column (7) is fixedly connected between the lower part of the detection unit (5) close to one side of the groove bottom plate of the movable groove (302) and the groove bottom plate of the movable groove (302), and prefabricated grooves are drilled at both ends of the connecting column (7).

6. The intelligent sensor for bridge deformation monitoring according to claim 1, characterized in that: A storage groove (303) is drilled in the side wall of the end of the shell (301) away from the communication groove, a trigger unit (13) is fixedly connected to the groove bottom plate of the storage groove (303), a data storage unit (12) is fixedly connected to one end of the trigger unit (13) away from the groove bottom plate of the storage groove (303), the overall density of the data storage unit (12) is less than the density of liquid water, a signal sending device is carried on the data storage unit (12), the data storage unit (12) is signal connected with the intelligent sensor body (2), and a locking ring (14) matched with the data storage unit (12) is fixedly connected to the opening of the shell (301).

7. The intelligent sensor for bridge deformation monitoring according to claim 6, characterized in that: The data storage unit (12) comprises a storage part (1201), two ends of the storage part (1201) are fixedly connected with a protection part one (1203) and a protection part two (1204) respectively, the center of gravity of the storage part (1201) is close to the side of the protection part two (1204), the thickness of the protection part two (1204) is greater than that of the protection part one (1203), and a plurality of elastic fins (1202) are fixedly connected on the side wall of the storage part (1201).

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