Bridge dynamic and static load test data acquisition instrument

Abstract

The utility model discloses a bridge dynamic and static load test data acquisition instrument which comprises a protection device and a detection device which are arranged on a bridge body. The detection device is used for detecting dynamic load data of a bridge, and the protection device is used for protecting the detection device; wherein the protection device comprises a telescopic sleeve piece and an elastic piece, the elastic piece is arranged in the telescopic sleeve piece, and the telescopic sleeve piece is arranged on the bridge body; the detection device comprises a magnet and a sensor, the sensor and the magnet are both installed on the bridge body, the end face of the magnet corresponds to the position of the sensor, and the sensor is used for detecting the magnetic induction line density of the magnet; the utility model aims to solve the problem that in the prior art, when a dynamic and static load detection device of a tractor-tilling bridge is used for collecting, due to the fact that a vehicle is small and light in weight, the displacement distance of a bridge plate is small, two sensor contacts do not make contact, and collected data are inaccurate.

Description

Technical Field

[0001] This utility model relates to the field of bridge dynamic and static load testing technology, specifically to a bridge dynamic and static load testing data acquisition instrument. Background Technology

[0002] In the field of bridge engineering, ensuring the safety and reliability of farm bridges is of paramount importance. Traditional bridge inspection methods have many limitations, making it difficult to accurately obtain response data of bridges under actual loads. With the continuous expansion of bridge construction scale and the increasing complexity of bridge structures, higher demands are placed on bridge inspection technology. Dynamic and static load tests on bridges can simulate the dynamic and static loads borne by bridges during actual operation, providing crucial data for evaluating bridge structural performance. As the core equipment for acquiring test data, the development of bridge dynamic and static load test data acquisition instruments is based on the urgent need for accurate, efficient, and comprehensive data acquisition. Early data acquisition instruments were insufficient in terms of accuracy, acquisition speed, and number of channels, failing to meet the complex requirements of modern bridge inspection. Against this backdrop, the development of data acquisition instruments with high precision, high speed, multiple channels, and stable and reliable operation has become an inevitable trend in the development of bridge engineering inspection technology.

[0003] The utility model patent with application number CN202222227387.7 and publication number CN217980409U (hereinafter referred to as "Prior Art 1") discloses an intelligent detection device for static and dynamic loads of bridges, which aims to detect the static and dynamic load problems of bridges. The device includes a bridge deck and abutments set at both ends of the bridge deck and supporting it. The device is characterized in that the static and dynamic load detection device is connected to the expansion joints of the bridge deck and the abutments. The static and dynamic load detection device includes a housing, and the lower end of the housing is connected to three connecting sleeves embedded in the expansion joint. The lower end of the connecting sleeve is connected to a sensor contact that fits the expansion joint b. One of the sensor contacts is connected to the other two sensor contacts through a support rod to form an isosceles triangle structure.

[0004] The specification of prior art 1 discloses an intelligent detection device for static and dynamic loads on bridges. In use, when testing the static and dynamic loads of a farm bridge, three sensor contacts arranged in an isosceles triangle are controlled to be in close contact with the expansion joint. Then, as the bridge experiences static and dynamic loads, the visualized pressure data fed back by the sensor contacts allows for faster, smarter, and more effective detection of the bridge's load performance. However, in practical applications, when using sensor contacts to test the static and dynamic loads of farm bridges, the test results need to be reflected through pressure. Since the weight of the vehicle is not fixed, and the displacement distance of the bridge deck after the vehicle passes is negligible, there is a high possibility that the vehicle's weight is too light, resulting in two contacts not making contact. This leads to inaccurate data collection and poor overall accuracy of the bridge's static and dynamic load test data. Summary of the Invention

[0005] This utility model provides a bridge dynamic and static load test data acquisition instrument, which aims to solve the problem in the existing technology of dynamic and static load testing devices for farm bridges. Due to the small size and weight of the vehicles, the displacement distance of the bridge deck is small, which causes the two sensor contacts to not make contact, resulting in inaccurate data acquisition.

[0006] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows:

[0007] A bridge dynamic and static load test data acquisition instrument includes a protective device and a detection device installed on the bridge body; the detection device is used to detect the dynamic load data of the bridge, and the protective device is used to protect the detection device.

[0008] The protective device includes a telescopic kit and an elastic element, with the elastic element disposed inside the telescopic kit, which is mounted on the bridge body. The detection device includes a magnet and a sensor, both of which are mounted on the bridge body. The end face of the magnet corresponds to the position of the sensor. The sensor is used to detect the magnetic linear density of the magnet and is connected to a remote control terminal via a controller.

[0009] Furthermore, the bridge body includes a bridge deck and piers located at the bottom of the bridge deck. The piers are used to support the bridge deck. There are expansion joints at the connection between the bridge deck and the piers. The protection device and the detection device are both located inside the expansion joints.

[0010] Furthermore, the telescopic kit includes a slide cylinder and a slide rod. One end of the slide cylinder is installed inside the expansion joint, and one end of the slide rod is installed inside the expansion joint, while the other end is slidably connected to the slide cylinder. The elastic element is disposed inside the slide cylinder, and one end of the slide rod located in the slide cylinder is used to contact the elastic element.

[0011] Furthermore, a limiting ring is provided at the opening of the slide cylinder, and a limiting piece is provided at the end of the slide rod. The limiting piece is used to limit the position of the slide rod after contacting the limiting ring, and the elastic element is used to connect with the slide rod through the end face of the limiting piece.

[0012] Furthermore, mounting plates are provided at the ends of the slide rod and the slide cylinder, and both the slide rod and the slide cylinder are connected to the expansion joint through the mounting plates.

[0013] Furthermore, an isolation plate is installed inside the expansion joint. The isolation plate is made of non-magnetic material and is located between the slide bar and the magnet.

[0014] Furthermore, an installation base is provided inside the expansion joint, and the sensor is mounted on the installation base.

[0015] Furthermore, the mounting plate is provided with pin holes, the inside of which is used to install pins, which are used to insert into the inner wall of the expansion joint.

[0016] Furthermore, the elastic element is either a spring or a sheet spring.

[0017] Furthermore, the sensor is a Hall sensor.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] This utility model mainly includes a protective device and a detection device. In actual use, after the completion of the farm bridge, a gap is reserved for installation during dynamic and static load tests. At this time, workers install the telescopic kit magnet and sensor in the gap. Then, different types of vehicles drive on the bridge body from two different directions. During this process, when the vehicle moves away from the gap, the surface of the bridge body will shift towards the gap due to friction. To prevent hard contact between the magnet and the sensor, a protective device is installed. When the surface of the bridge body shifts, the sliding rod compresses the elastic element in the sliding cylinder. The system buffers the surface of the bridge structure, effectively protecting the magnets and sensors. Hall effect sensors are used; when the magnet approaches, the magnetic field density increases, leading to a higher sensor reading. This reading is recorded. By setting a threshold, the change in sensor value is compared. A larger change indicates significant displacement of the bridge surface, suggesting the bridge construction is substandard; conversely, a smaller change indicates it is acceptable. This design ensures accurate detection of magnetic field density, preventing undetected instances, and the protective device effectively safeguards the detection equipment. Attached Figure Description

[0020] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained from these drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of the structure of this utility model.

[0022] Figure 2 This utility model Figure 1 A magnified view of a portion of point A in the middle.

[0023] Figure 3 This is a simplified diagram of the magnetic field lines structure of the magnet in this utility model.

[0024] In the diagram, 101-telescopic kit, 102-elastic element, 103-magnet, 104-sensor, 105-bridge deck, 106-pier, 107-sliding cylinder, 108-sliding rod, 109-limiting ring, 110-limiting piece, 111-mounting plate, 112-isolation plate, 113-mounting base, 114-pin hole, 115-pin. Detailed Implementation

[0025] The present invention will be further described below with reference to the embodiments. The described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, other embodiments obtained by those skilled in the art without creative effort are all within the protection scope of the present invention.

[0026] Please see Figures 1-3 As shown, this embodiment discloses a bridge dynamic and static load test data acquisition instrument, including a protection device and a detection device installed on the bridge body; the detection device is used to detect the dynamic load data of the bridge, and the protection device is used to protect the detection device.

[0027] The protective device includes a telescopic kit 101 and an elastic element 102. The elastic element 102 is disposed inside the telescopic kit 101, which is disposed on the bridge body. The detection device includes a magnet 103 and a sensor 104. Both the sensor 104 and the magnet 103 are mounted on the bridge body. The end face of the magnet 103 corresponds to the position of the sensor 104. The sensor 104 is used to detect the magnetic linear density of the magnet 103. The sensor 104 is connected to a remote control terminal through a controller.

[0028] This utility model mainly includes a protective device and a detection device. In actual use, after the completion of the farm bridge, a gap is reserved for installation during dynamic and static load tests. At this time, workers install the telescopic kit 101, magnet 103, and sensor 104 in the gap. Then, different types of vehicles drive on the bridge body from two different directions. During this process, when the vehicles move away from the gap, the surface of the bridge body will displace towards the gap due to friction. To prevent hard contact between magnet 103 and sensor 104, a protective device is installed to protect sensor 104. The sensor 104 is a Hall sensor. During use, since the magnet 103 itself has magnetic field lines, when the sensor 104 is close to the magnet 103, the magnetic field line density increases, and the value of the sensor 104 increases. The value of the sensor 104 is recorded. By setting a threshold, the change in the value of the sensor 104 is compared. A larger change indicates that the surface displacement of the bridge body is large, indicating that the construction of the farm bridge is unqualified. Conversely, if the change is small, it is qualified. The advantage of this setting is that the detection of magnetic field line density by the sensor 104 will not fail to detect, making the detection results relatively more accurate. In addition, the protection device can effectively protect the detection device.

[0029] As an optional implementation, in this embodiment, the remote control terminal is a smartphone, and the sensor 104 can transmit data to the smartphone in real time and record it.

[0030] It should be noted that in this embodiment, the transmission of the detection result by the sensor 104 to the smartphone is existing technology, such as the prior art with application number CN201910206755.X and publication number WO2020187299A3, which clearly describes how the smartphone and the sensor 104 are connected. This embodiment does not involve any improvement to the structure of the smartphone and the sensor 104, nor does it involve any improvement to the connection relationship between the sensor 104 and the smartphone. All existing technologies are used, and will not be described in detail here.

[0031] In some embodiments, the bridge body includes a bridge deck 105 and a pier 106 disposed at the bottom of the bridge deck 105. The pier 106 is used to support the bridge deck 105. An expansion joint is provided at the connection between the bridge deck 105 and the pier 106. The protection device and the detection device are both disposed inside the expansion joint.

[0032] In actual use, the expansion joint (equivalent to the gap mentioned above) is formed between the bridge deck 105 and the pier 106. The pier 106 supports the bridge deck 105. When a car drives on the bridge deck 105, the bridge deck 105 is subjected to friction and undergoes a slight displacement on the pier 106. For details, please refer to the utility model patent with application number CN202222227387.7 and publication number CN217980409U.

[0033] In some embodiments, the telescopic kit 101 includes a slide cylinder 107 and a slide rod 108. One end of the slide cylinder 107 is installed inside the expansion joint, and one end of the slide rod 108 is installed inside the expansion joint, while the other end is slidably connected to the slide cylinder 107. The elastic element 102 is disposed inside the slide cylinder 107, and one end of the slide rod 108 located in the slide cylinder 107 is used to contact the elastic element 102.

[0034] In actual use, when the bridge deck 105 is displaced on the pier 106, the slide bar 108 squeezes the elastic element 102 in the slide cylinder 107, thereby buffering the surface of the bridge body and effectively protecting the magnet 103 and the sensor 104.

[0035] As an optional implementation, in this embodiment, the elastic element 102 is specifically a spring. One end of the spring is disposed in the slide cylinder 107, and the other end is connected to the slide rod 108. When the slide rod 108 moves in the slide cylinder 107, the slide rod 108 compresses the spring, and the spring buffers the movement of the slide rod 108, thereby effectively preventing hard contact between the magnet 103 and the sensor 104.

[0036] In some embodiments, a limiting ring 109 is provided at the opening of the slide cylinder 107, and a limiting piece 110 is provided at the end of the slide rod 108. The limiting piece 110 is used to limit the position of the slide rod 108 after contacting the limiting ring 109. The elastic member 102 is used to connect with the slide rod 108 through the end face of the limiting piece 110.

[0037] In actual use, the purpose of setting the limit ring 109 and the limit piece 110 is to prevent the slide rod 108 from disengaging from the slide cylinder 107.

[0038] In some embodiments, the ends of the slide rod 108 and the slide cylinder 107 are provided with mounting plates 111, and the slide rod 108 and the slide cylinder 107 are both connected to the expansion joint through the mounting plates 111.

[0039] In actual use, the purpose of setting the mounting plate 111 is to facilitate the installation of the slide rod 108 and the slide cylinder 107. Setting the mounting plate 111 is only one way to install the slide rod 108 and the slide cylinder 107. The connection between the slide rod 108 and the slide cylinder 107 and the expansion joint is not limited to the use of the mounting plate 111. For example, the slide rod 108 and the slide cylinder 107 are connected to the expansion joint by adhesive bonding.

[0040] In some embodiments, an isolation plate 112 is provided inside the expansion joint. The isolation plate 112 is made of a non-magnetic material and is located between the slide bar 108 and the magnet 103.

[0041] In actual use, the purpose of setting the isolation plate 112 is to prevent the magnet 103 from affecting the movement between the slide rod 108 and the slide cylinder 107.

[0042] In some embodiments, an installation base 113 is also provided inside the expansion joint, and the sensor 104 is disposed on the installation base 113.

[0043] In actual use, the purpose of setting the mounting base 113 is to facilitate the installation of the sensor 104. As an optional implementation, the mounting base 113 has a battery inside, and the sensor 104 is electrically connected to the battery, which powers the sensor 104.

[0044] In some embodiments, the mounting plate 111 is provided with a pin hole 114, the inside of which is used to install a pin 115, which is used to insert into the inner wall of the expansion joint.

[0045] In actual use, when installing the slide rod 108 and the slide cylinder 107, the staff inserts the pin 115 into the pin hole 114 on the mounting plate 111, and finally inserts it into the inner wall of the expansion joint so that the slide rod 108 and the slide cylinder 107 are fixed inside the expansion joint respectively.

[0046] In some embodiments, sensor 104 is a Hall sensor 104.

[0047] It should be noted that the Hall sensor 104 in this embodiment is existing technology. The Hall sensor 104 can detect the density of the magnetic field lines of the magnet 103. Its model number is SS495A. This embodiment does not involve any improvement to the structure of the Hall sensor 104. Existing technology is used, and it will not be described in detail here.

[0048] In the description of this utility model, it should be understood that the terms "coaxial", "bottom", "one end", "top", "middle", "other end", "upper", "side", "top", "inner", "front", "center", "both ends", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0049] Furthermore, the terms “first,” “second,” “third,” and “fourth” are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as “first,” “second,” “third,” or “fourth” may explicitly or implicitly include at least one of those features.

[0050] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "setting," "connection," "fixing," "screw connection," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Unless otherwise explicitly limited, those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0051] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A bridge dynamic and static load test data acquisition instrument, characterized in that: include: Protective and detection devices installed on the bridge structure; The detection device is used to detect the dynamic load data of the bridge, and the protection device is used to protect the detection device. The protective device includes a telescopic kit and an elastic element, wherein the elastic element is disposed inside the telescopic kit and the telescopic kit is disposed on the bridge body; The detection device includes a magnet and a sensor. Both the sensor and the magnet are mounted on the bridge body. The end face of the magnet corresponds to the position of the sensor. The sensor is used to detect the magnetic linear density of the magnet. The sensor is connected to a remote control terminal through a controller.

2. The bridge dynamic and static load test data acquisition instrument according to claim 1, characterized in that: The bridge body includes a bridge deck and piers located at the bottom of the bridge deck. The piers are used to support the bridge deck. There are expansion joints at the connection between the bridge deck and the piers. The protection device and the detection device are both located inside the expansion joints.

3. The bridge dynamic and static load test data acquisition instrument according to claim 2, characterized in that: The telescopic kit includes a slide cylinder and a slide rod. One end of the slide cylinder is installed inside the expansion joint, and one end of the slide rod is installed inside the expansion joint, while the other end is slidably connected to the slide cylinder. The elastic element is disposed inside the slide cylinder, and the end of the slide rod located in the slide cylinder is used to contact the elastic element.

4. The bridge dynamic and static load test data acquisition instrument according to claim 3, characterized in that: A limiting ring is provided at the opening of the slide cylinder, and a limiting piece is provided at the end of the slide rod. The limiting piece is used to limit the position of the slide rod after contacting the limiting ring. The elastic element is used to connect to the slide rod through the end face of the limiting piece.

5. A bridge dynamic and static load test data acquisition instrument according to claim 2, characterized in that: Mounting plates are provided at the ends of the sliding rod and the sliding cylinder, and the sliding rod and the sliding cylinder are connected to the expansion joint through the mounting plates.

6. The bridge dynamic and static load test data acquisition instrument according to claim 1, characterized in that: An isolation plate is installed inside the expansion joint. The isolation plate is made of non-magnetic material and is located between the slide bar and the magnet.

7. A bridge dynamic and static load test data acquisition instrument according to claim 2, characterized in that: An installation base is also provided inside the expansion joint, and the sensor is installed on the installation base.

8. A bridge dynamic and static load test data acquisition instrument according to claim 7, characterized in that: The mounting plate has pin holes for installing pins, which are then inserted into the inner wall of the expansion joint.

9. A bridge dynamic and static load test data acquisition instrument according to claim 1, characterized in that: The elastic element is one of the springs or spring sheets.

10. A bridge dynamic and static load test data acquisition instrument according to claim 1, characterized in that: The sensor is a Hall sensor.

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