Intelligent sensor for bridge deformation monitoring

Abstract

The invention relates to an intelligent sensor for bridge deformation monitoring in the field of bridge monitoring, and the intelligent sensor comprises a plurality of intelligent sensor modules fixedly connected to the lower end of a bridge main body, and each intelligent sensor module comprises an intelligent sensor main body, a detection housing, a detection unit, and an electromagnetic ring. The magnetic ring and the detection unit are used for detecting the working state of the intelligent sensor main body, the electrified electromagnetic ring can form magnetic attraction force on the magnetic ring and overcome the pressure generated by deformation of the compression spring, so that the detection unit integrally moves upwards until the upper end of the detection unit is in contact with the intelligent sensor main body; and the detection unit is used for continuously applying pressure to the intelligent sensor main body, so that the contact surface of the functional part and the bridge main body is deformed, the data current of the intelligent sensor main body is further influenced, the working state of the intelligent sensor main body is detected, the faulted intelligent sensor main body is found in time, and maintenance processing is carried out in time.

Description

Technical Field

[0001] The present invention relates to an intelligent sensor, and in particular to an intelligent sensor used in the field of bridge monitoring for bridge deformation monitoring. Background Art

[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 detect abnormal deformation in a timely manner and avoid structural failure or collapse; quantify the long-term performance changes of bridges under load, environmental and other factors, verify whether the design and construction meet the expected requirements, and provide data support for maintenance, reinforcement or replacement.

[0003] The invention patent CN202210621375.4 specification discloses a parallel device of soft sensors for measuring deformation. The soft sensors are enclosed inside a sealed telescopic connector, which protects the soft sensors from external influences while monitoring bearing deformation from six degrees of freedom. It can measure the dynamic behavior of bearings during normal and peak periods of vehicle operation in real time, and obtain displacement data of damaged bearings as an important basis for evaluating and replacing bearings. It fundamentally replaces manual inspection operations, reduces maintenance time and manual operation error rate, and greatly reduces potential dangers for workers during the maintenance process.

[0004] The invention patent CN202310129715.6 specification discloses a method for analyzing the overall stability of a bridge. By installing displacement monitoring sensors and temperature sensors on the piers of the bridge, the statistical relationship between displacement and temperature is obtained using the least squares method based on the measurement results of the temperature and displacement of the bridge under no load conditions. The displacement measured under load conditions is then corrected for the temperature influence to obtain a dynamic displacement, and the load imbalance deviation is obtained on this basis. The overall stability of the bridge is judged based on the load imbalance deviation, which solves the difficulties in analyzing the overall stability of the bridge.

[0005] In the existing technology, the main improvement direction of bridge deformation sensors is to reduce the impact of the external environment and manual operation on the detection results and increase the accuracy of detection. In the actual detection process, it is usually necessary to set up multiple sensors at the corresponding positions of the bridge to work. Although there are multiple sensors, their main objects are different, and the faulty sensor cannot be discovered in time through other sensor data. Once a sensor failure occurs, it is very likely to have a major impact on the bridge work. Summary of the Invention

[0006] In view of the above-mentioned existing technologies, the technical problem to be solved by the present invention is that it is impossible to timely detect a faulty sensor through data from other sensors. Once a sensor failure occurs, it is very likely to have a significant impact on bridge operation.

[0007] To solve the above problems, the present invention provides an intelligent sensor for bridge deformation monitoring, comprising a plurality of intelligent sensor modules fixedly connected to the lower end of the bridge body, wherein the plurality of intelligent sensor modules each comprise a mutually matching intelligent sensor body and a detection shell, wherein 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, and the detection shell comprises a shell, wherein a movable groove is bored at the lower end of the shell, a detection unit is inserted into the movable groove, one end of the detection unit passes through the shell and extends into the shell, a compression spring is fixed between the detection unit and the bottom plate of the movable groove, and an electromagnetic ring and a magnetic ring with matching positions are respectively fixedly connected to the bottom plate of the movable groove and the detection unit;

[0008] The main body of the intelligent sensor includes a functional part, the upper end of which is fixedly connected to a detection part, and the detection part is tightly attached to the bridge body. A connecting part is carved on the side wall of the functional part, and a communication groove is carved on the side wall of the shell, and the connecting part passes through the communication groove.

[0009] In the above-mentioned intelligent sensor for bridge deformation monitoring, the working status of the intelligent sensor body is detected, the faulty intelligent sensor body is discovered in time, and maintenance is carried out in time.

[0010] As a further improvement of the present application, an elastic bag is fixedly connected to the upper end of the detection unit, and a plurality of filling balls are loaded in the elastic bag. The impact of the multiple elastic bags greatly reduces the impact of the detection unit on the intelligent sensor body during the detection of the working status of the detection unit, thereby reducing the possibility of damage to the intelligent sensor body.

[0011] As a further improvement and supplement to the present application, the sum of the volumes of the multiple filling balls is nine-tenths of the volume of the cavity in the elastic sac, and the elastic sac is filled with lubricating oil to reduce the deformation of the elastic sac when it plays a buffering role, so that the detection unit can better apply pressure to the smart sensor body. The presence of lubricating oil can greatly reduce the wear of the filling balls caused by impact when playing a buffering role, and it is not easy to cause excessive wear of the filling balls, and it is not easy to affect the buffering effect of the filling balls.

[0012] As a further improvement of the present application, a dust plug is inserted into the communication slot. The shape of the dust plug matches the communication slot and the connecting part, and the dust plug has an interference fit with the communication slot, so that the working environment of the smart sensor body is easy to maintain, reducing the impact of the external environment on the working state of the smart sensor body.

[0013] As another improvement of the present application, a connecting column is fixedly connected between the side of the lower part of the detection unit close to the bottom plate of the movable groove and the bottom plate of the movable groove. Prefabricated grooves are respectively opened at both ends of the connecting column. The connecting column is used to fix the detection unit as a whole in the movable groove and the shell, so as to facilitate the transportation and storage of the detection shell as a whole.

[0014] As a further improvement of the present application, a storage slot is excavated on the side wall of the shell away from the communication slot, and a trigger unit is fixedly connected to the bottom plate of the storage slot. The trigger unit is fixedly connected to the end of the storage slot away from the bottom plate of the storage slot. The overall density of the data storage unit is less than the density of liquid water. The data storage unit is equipped with a signal sending device, and the data storage unit is connected to the signal of the intelligent sensor body. A locking ring matching the data storage unit is fixedly connected to the opening of the shell to save the data detected before the collapse of the bridge body, retain the monitoring data samples for future bridge monitoring, and increase the accuracy of intelligent sensor detection.

[0015] As a further improvement supplement to the present application, the data storage unit includes a storage part, and the two ends of the storage part are respectively fixedly connected to the protection part one and the protection part two, and the center of gravity of the storage part is leaning toward the side of the protection part two, the thickness of the protection part two is greater than that of the protection part one, and a plurality of elastic fins are fixedly connected to the side wall of the storage part, thereby increasing the protection effect of the data storage unit and making the data storage unit less likely to be damaged and fail.

[0016] To sum up, the present application uses a detection unit to detect the working status of the intelligent sensor body. The energized electromagnetic ring will form a magnetic attraction on the magnetic ring, and overcome the pressure generated by the deformation of the compression spring, so that the detection unit moves upward as a whole until the upper end of the detection unit contacts the intelligent sensor body, and the detection unit is used to continue to apply pressure to the intelligent sensor body, so that the contact surface between the functional part and the bridge body is deformed, thereby affecting the data current of the intelligent sensor body, realizing the detection of the working status of the intelligent sensor body, timely discovering the faulty intelligent sensor body, and timely performing maintenance processing.

[0017] At the same time, a data storage unit has been added to store the data detected by the smart sensor body in real time. When the smart sensor body is at risk of damage due to bridge collapse, the data storage unit is ejected from the storage slot to under the bridge. Under the action of water flow, it stays away from the possible bridge collapse area and saves the data detected before the bridge body collapse, retaining monitoring data samples for future bridge monitoring, thereby increasing the accuracy of smart sensor detection. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a structural schematic diagram of the smart sensor module installed on a bridge according to the first embodiment of the present application;

[0019] Figure 2 This is a schematic structural diagram of the intelligent sensor module in the standby state according to the first embodiment of the present application;

[0020] Figure 3 A front cross-sectional view of the smart sensor module in the first embodiment of the present application in a working state;

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

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

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

[0024] Figure 7 This is a schematic structural diagram of the intelligent sensor body according to the first embodiment of the present application;

[0025] Figure 8 This is a schematic diagram of the working state changes of the smart sensor module according to the first embodiment of the present application;

[0026] Figure 9 This is a structural diagram of the intelligent sensor module in the second embodiment of the present application in a standby state;

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

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

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

[0030] Description of the numbers in the figure:

[0031] 1 Bridge body, 2 Intelligent sensor body, 201 Functional part, 202 Detection part, 203 Connection part, 3 Detection shell, 301 Shell, 302 Movable slot, 303 Storage slot, 4 Dust plug, 5 Detection unit, 6 Compression spring, 7 Connecting column, 8 Magnetic ring, 9 Electromagnetic ring, 10 Elastic capsule, 11 Filling ball, 12 Data storage unit, 1201 Storage part, 1202 Elastic fin, 1203 Protection part 1, 1204 Protection part 2, 13 Trigger unit, 14 Locking ring. DETAILED DESCRIPTION

[0032] Two implementation modes of the present application are described in detail below with reference to the accompanying drawings.

[0033] The first implementation method:

[0034] Figure 1-4The present invention shows an intelligent sensor for monitoring bridge deformation, comprising a plurality of intelligent sensor modules fixedly connected to the lower end of a bridge body 1. The plurality of intelligent sensor modules each comprise a mutually matching intelligent sensor body 2 and a detection housing 3. The intelligent sensor body 2 and the detection housing 3 are respectively bonded to the lower end of the bridge body 1 by glue, and the detection housing 3 is sleeved on the lower end of the intelligent sensor body 2. The detection housing 3 comprises a shell 301. A movable groove 302 is bored 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, which are matched in position, are respectively fixedly connected to the bottom plate of the movable groove 302 and the detection unit 5.

[0035] See also Figure 7 The intelligent sensor body 2 includes a functional part 201, the upper end of the functional part 201 is fixedly connected to the detection part 202, and the detection part 202 is close to the bridge body 1, the side wall of the functional part 201 is opened with a connecting part 203, and the side wall of the shell 301 is opened with a communication groove, and the connecting part 203 passes through the communication groove.

[0036] In this embodiment, the smart sensor body 2 is a strain gauge pressure sensor. When the bridge body 1 is deformed, it will compress the functional part 201, causing the functional part 201 to deform, thereby affecting the data current of the smart 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 smart sensor body 2. The energized electromagnetic ring 9 will form a magnetic attraction on the magnetic ring 8, and overcome the pressure generated by the deformation of the compression spring 6, so that the detection unit 5 moves upward as a whole until the upper end of the detection unit 5 contacts the smart sensor body 2, and the detection unit 5 continues to apply pressure to the smart sensor body 2, so that the contact surface between the functional part 201 and the bridge body 1 is deformed, thereby affecting the data current of the smart sensor body 2, realizing the detection of the working status of the smart sensor body 2, timely discovering the faulty smart sensor body 2, and timely performing maintenance processing.

[0038] The upper end of the detection unit 5 is fixedly connected to an elastic capsule 10, and the elastic capsule 10 is filled with multiple filling balls 11. The impact of multiple elastic capsules 10 greatly reduces the impact of the detection unit 5 on the intelligent sensor body 2 during the detection of the working status of the detection unit 5, and reduces 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 in the elastic capsule 10. The elastic capsule 10 is filled with lubricating oil, which reduces the deformation of the elastic capsule 10 when it plays a buffering role, so that the detection unit 5 can better apply pressure to the intelligent sensor body 2, and the presence of lubricating oil can greatly reduce the wear of the filling balls 11 caused by impact when playing a buffering role, and is not easy to cause excessive wear of the filling balls 11, and is not easy 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, and the dust plug 4 has an interference fit with the communication slot, making it easy to maintain the working environment of the smart sensor body 2 and reducing the impact of the external environment on the working state of the smart sensor body 2.

[0040] See also Figure 5-6 A connecting column 7 is fixedly connected between the bottom plate of the movable groove 302 and the bottom plate of the movable groove 302 at the lower part of the detection unit 5. Prefabricated grooves are respectively cut at both ends of the connecting column 7. When the intelligent sensor module is in the standby state, the connecting column 7 is used to fix the detection unit 5 as a whole in the movable groove 302 and the shell 301, which is convenient for the transportation and storage of the detection shell 3 as a whole. When the intelligent sensor module is converted to the working state, please refer to Figure 8 By pressing the detection unit 5 as a whole toward the smart sensor body 2, the multiple connecting columns 7 are broken along the two prefabricated grooves, and the fixation between the detection unit 5 and the detection shell 3 is released. Under the action of the compression spring 6 in a compressed state, the detection unit 5 moves away from the detection shell 3 and turns into a working state, so that the smart sensor body 2 can be detected regularly.

[0041] In the present application, the magnetic ring 8 and the electromagnetic ring 9 are used in conjunction to realize that the detection unit 5 presses the smart sensor body 2, detects the working status of the smart sensor body 2, and realizes the purpose of timely discovering the faulty smart sensor body 2 and performing maintenance in time. In particular, the detection of the smart sensor body 2 is a regular detection. At the same time, the detection of the smart sensor body 2 is preferably carried out in the late night and early morning when there are few pedestrians and vehicles, so as to reduce the influence of external environmental factors on the detection structure and increase the accuracy of the detection results.

[0042] Second implementation method:

[0043] Figure 9-11An intelligent sensor for bridge deformation monitoring is shown. A storage slot 303 is opened on the side wall of the shell 301 at one end away from the communication slot. A trigger unit 13 is fixedly connected to the bottom plate of the storage slot 303. The trigger unit 13 is fixedly connected to the end of the storage slot 303 away from the bottom plate of the storage slot 303. The overall density of the data storage unit 12 is less than the density of liquid water. The data storage unit 12 is equipped with a signal sending device. The data storage unit 12 is signal-connected to the intelligent sensor body 2. A locking ring 14 matching the data storage unit 12 is fixedly connected to the opening of the shell 301.

[0044] In particular, in this embodiment, the detection data of the functional part 201 will be initially processed by the detection part 202 and then transmitted to the processing terminal through the connection part 203 and the transmission line. The processing terminal will process and store the data, and perform early warning and daily maintenance work. At the same time, the detection data is transmitted from the smart sensor body 2 to the data storage unit 12 via wireless transmission, and is temporarily stored in the data storage unit 12. The data storage capacity in the data storage unit 12 is the amount of data generated within a maintenance cycle of the smart sensor body 2. When the data storage unit 12 is full of data, 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-mounted airbag. When the bridge body 1 bends to a preset degree and is at risk of breaking and burying the smart sensor body 2 and the detection shell 3, the transmission line on which the data transmission of the connection part 203 depends breaks and fails. The trigger unit 13 is triggered, and an airbag is quickly generated to push the data storage unit 12 out of the storage slot 303 and shoot it under the bridge. Under the action of the water flow, it stays away from the possible bridge collapse area and saves the data detected before the collapse of the bridge body 1. The monitoring data samples are retained for future bridge monitoring, thereby increasing the accuracy of the smart sensor detection. The data storage unit 12 that flows away with the water flow can quickly locate the approximate interval according to the flow time and water flow rate, and quickly recover the signal generated by the signal sending device carried by the data storage unit 12.

[0046] See also Figure 12The data storage unit 12 includes a storage part 1201, and the storage part 1201 adopts a waterproof package. The two ends of the storage part 1201 are fixedly connected with a protection part 1203 and a protection part 2 1204 respectively, and the center of gravity of the storage part 1201 is close to the side of the protection part 2 1204. The thickness of the protection part 2 1204 is greater than that of the protection part 1 1203. A plurality of elastic fins 1202 are fixedly connected to the side wall of the storage part 1201. After the data storage unit 12 is ejected, the data storage unit 12 will be more likely to face downward at the end connected to the protection part 2 1204 due to the distribution of the center of gravity of the storage part 1201 itself, so that when the data storage unit 12 collides with other hard objects as a whole, the protection part 2 1204 with the best protection performance will be in direct contact with the hard object, thereby increasing the protection effect of the data storage unit 12 and making the data storage unit 12 less likely to be damaged and fail.

[0047] In this embodiment, compared with the first embodiment, a data storage unit 12 is added, which can store the data detected by the smart sensor body 2 in real time. When the smart sensor body 2 is at risk of damage due to bridge collapse, the data storage unit 12 is ejected from the storage slot 303 to under the bridge. Under the action of water flow, it stays away from the possible bridge collapse area and saves the data detected before the collapse of the bridge body 1, retaining monitoring data samples for future bridge monitoring, thereby increasing the accuracy of smart sensor detection.

[0048] In particular, in the drawings of the present application, for the sake of convenience, the various structures are not drawn strictly in proportion, nor are they arranged according to the actual situation. Figure 1 The dimensions of the bridge body 1 and the arrangement of the intelligent sensor modules (which should be arranged at the required monitoring locations rather than in an array) can be reasonably designed and arranged by those skilled in the art based on actual conditions. At the same time, an energy storage unit is installed in the shell 301 of this application to power the electrical structures in the intelligent sensor modules. The power supply method and wiring method are both well-known technologies to those skilled in the art and are therefore not disclosed in detail in this application.

[0049] In view of current actual needs, the protection scope of the above-mentioned implementation mode adopted in this application is not limited to this. Various changes made within the knowledge scope of technical personnel in this field without departing from the concept of this application still fall within the protection scope of the present invention.

Claims

1. An intelligent sensor for bridge deformation monitoring, comprising a plurality of intelligent sensor modules fixedly connected to the lower end of a bridge body (1), characterized in that: The plurality of intelligent sensor modules each include an intelligent sensor body (2) and a detection shell (3) that match each other. The intelligent sensor body (2) and the detection shell (3) are respectively bonded to the lower end of the bridge body (1) by glue, and the detection shell (3) is sleeved on the lower end of the intelligent sensor body (2). The detection shell (3) includes a shell (301). A movable groove (302) is cut 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) that match each other in position are respectively fixedly connected to the bottom plate of the movable groove (302) and the detection unit (5). The intelligent sensor body (2) includes a functional part (201), the upper end of the functional part (201) is fixedly connected to a detection part (202), and the detection part (202) is closely attached to the bridge body (1), a connecting part (203) is bored on the side wall of the functional part (201), a communication groove is bored on the side wall of the shell (301), and the connecting part (203) passes through the communication groove.

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 to an elastic bag (10), and a plurality of filling balls (11) are filled in the elastic bag (10).

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 dust plug (4) is inserted into the communication slot, the shape of the dust plug (4) matches the communication slot and the connecting portion (203), and the dust plug (4) is interference-fitted with the communication slot.

5. The intelligent sensor for bridge deformation monitoring according to claim 1, characterized in that: A connecting column (7) is fixedly connected between one side of the lower portion of the detection unit (5) close to the bottom plate of the movable groove (302) and the bottom plate of the movable groove (302), and prefabricated grooves are respectively bored 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 slot (303) is formed on a side wall of the housing (301) at one end 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 one end of the trigger unit (13) away from the bottom plate of the storage slot (303), the overall density of the data storage unit (12) is less than the density of liquid water, a signal sending device is mounted on the data storage unit (12), the data storage unit (12) is signal-connected to the intelligent sensor body (2), and a locking ring (14) matching the data storage unit (12) is fixedly connected to the opening of the housing (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), wherein two ends of the storage part (1201) are respectively fixedly connected to a protection part 1 (1203) and a protection part 2 (1204), and the center of gravity of the storage part (1201) is leaning toward the side of the protection part 2 (1204), the thickness of the protection part 2 (1204) is greater than that of the protection part 1 (1203), and a plurality of elastic fins (1202) are fixedly connected to the side wall of the storage part (1201).

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