A bridge structure health monitoring device

Abstract

The utility model belongs to the technical field, and specifically relates to a bridge structure health monitoring device, including an installation box, one side of the top of the installation box extends to form an extension plate, a hollow notch is opened at the far end of the top of the extension plate, the bottom of the notch is connected to a bottom plate, and a gap is left on the side of the bottom plate, so that the notch is semi-open, a thermometer is installed on one side of the installation box, a sub-plate is arranged on the bottom side of the installation box, a fixing rod is also arranged at the bottom of the installation box and on one side of the sub-plate, a fixing plate is fixed at the bottom of the fixing rod, and a displacement meter extends out of the installation box. The utility model can realize dual-function synchronous detection and reduce the occupation of the bridge structure, and at the same time, the thermometer can continuously adjust the position and the test surface of the thermometer to ensure that the temperature test data is stable and accurate, reduce the test error, and avoid a large gap between the data measured by the displacement meter, so as to ensure the accuracy of the measurement data.

Description

Technical Field

[0001] The utility model belongs to the technical field, and in particular relates to a bridge structure health monitoring device. Background Art

[0002] After the bridge is built, it is easy to be damaged by factors such as climate, corrosion, oxidation or aging, as well as long-term static and live loads. Correspondingly, its strength and stiffness will decrease with time. During operation, the bridge will be affected by external factors such as traffic load, wind, temperature and sudden natural disasters, as well as internal factors such as concrete shrinkage creep, concrete aging, concrete carbonization, steel bar relaxation, steel bar corrosion, cable corrosion, pier foundation settlement, etc. Under the influence of internal and external factors, a large-span cable-stayed bridge will produce various effects such as geometric changes, internal force changes and cable force changes. If these changes are too large and exceed the safety range that the bridge can withstand, catastrophic consequences will occur.

[0003] Problems with existing technologies:

[0004] Based on the above, for the sake of bridge safety performance, bridge health monitoring equipment will be fixed on the bridge structure. These devices can monitor various parameters of the bridge, such as deflection, inclination, vibration, stress and strain, etc., as well as environmental parameters such as temperature, humidity, wind speed, etc. The use of these devices can timely understand the health status of the bridge and provide important data support for the maintenance and management of the bridge. However, the current detection equipment has a relatively single function. One device can only correspond to one detection function and occupy the bridge structure. Utility Model Content

[0005] The purpose of the utility model is to provide a bridge structure health monitoring device, which can realize dual-function synchronous detection and reduce the occupancy of the bridge structure. At the same time, the thermometer can continuously adjust the position and the test surface of the thermometer 5 to ensure that the temperature test data is stable and accurate, reduce the test error, and avoid a large gap between the data measured by the displacement meter, thereby ensuring the accuracy of the measurement data.

[0006] The technical solution adopted by the utility model is as follows:

[0007] A bridge structure health monitoring device comprises an installation box, one side of the top of the installation box extends to form an extension plate, a hollow notch is provided at the far end of the top of the extension plate, the bottom of the notch is connected to a bottom plate, a vacant space is left on the side of the bottom plate, so that the notch is semi-open, and a thermometer is installed on one side of the installation box;

[0008] A sub-plate is arranged on the bottom side of the installation box, a fixing rod is arranged on the bottom of the installation box and on one side of the sub-plate, a fixing plate is fixed on the bottom of the fixing rod, a displacement meter extends out of the installation box, the displacement meter passes vertically downward through the fixing plate, and the displacement meter emits a light beam periodically.

[0009] The thermometer is located on the top of the bottom plate through the opening, and the side of the thermometer is close to the side of the bridge.

[0010] Two tension wires are extended from one side of the auxiliary plate facing the displacement meter, and the other ends of the tension wires are provided with fixed heads, which are fixed on the bridge to make the tension wires tense.

[0011] A slidable slide plate is arranged on the two pull lines, and the two ends of the slide plate are bent to form a hook, and the hooks on both sides hook the pull lines so that the slide plate can be suspended on the pull lines.

[0012] The bridge structure health monitoring equipment also includes the following structures:

[0013] The installation box is equipped with a collection chip, a wireless transmission module, and a processing chip, which are connected by electrical signals;

[0014] The above structure also includes the following monitoring method:

[0015] Step 1: Fix the installation box to the corresponding bridge node and the extension plate to the bottom surface of the bridge node so that the side of the thermometer can be close to the bridge to monitor the bridge temperature in real time;

[0016] Step 2: Fix the sub-plate at the bottom of the installation box to the side of the bridge, and pull the cable to make it tight. Fix the fixed head of the other end of the cable to the bridge. Pass the displacement meter through the slide plate to make the slide plate in a relatively stable state. When the bridge deck is moving, the vibration of the bridge body is transmitted to the displacement meter. The displacement meter emits a light beam at a fixed time and collects the reflected light beam data.

[0017] Step 3: The acquisition chip built into the installation box collects the temperature and displacement deviation data in steps 1 and 2, and transmits the data to the terminal wirelessly.

[0018] The technical effects achieved by the utility model are:

[0019] In the utility model, a receiving device capable of receiving a light beam is placed at a position corresponding to a displacement meter on a bridge structure. The light beam emitted by the displacement meter at regular intervals is reflected, and the amplitude of the bridge vibration is inferred by measuring the change of interference fringes between the reflected light beam and the incident light beam, thereby judging the health condition of the bridge.

[0020] In the utility model, when the thermometer passes through the gap and is located on the top of the bottom plate, the side of the thermometer is close to the bridge, which reduces the measurement error of the thermometer. Compared with screw fixing, this method is more flexible and can continuously adjust the position of the thermometer and the test surface of the thermometer to ensure stable and accurate temperature test data and reduce test errors. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0022] Figure 2 This utility model Figure 1 A schematic diagram of the structure viewed from above;

[0023] Figure 3 It is a structural schematic diagram of the slide plate in the utility model;

[0024] Figure 4 It is a structural schematic diagram of a thermometer and a displacement meter detection flow chart in the utility model.

[0025] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0026] 1. Installation box; 2. Extension plate; 3. Slot; 4. Bottom plate; 5. Thermometer; 6. Sub-plate; 7. Fixing rod; 8. Fixing plate; 9. Displacement meter; 10. Pull wire; 11. Slide plate; 12. Return hook; 13. Fixing head. DETAILED DESCRIPTION

[0027] In order to make the purpose and advantages of the utility model more clear, the utility model is specifically described in combination with the following embodiments. It should be understood that the following text is only used to describe one or several specific implementations of the utility model, and does not strictly limit the protection scope of the specific request of the utility model.

[0028] like Figure 1-2 As shown, a bridge structure health monitoring device includes an installation box 1, and one side of the top of the installation box 1 extends to form an extension plate 2, and a hollow notch 3 is opened at the far end of the top of the extension plate 2, and the bottom of the notch 3 is connected to a bottom plate 4, and a gap is left on the side of the bottom plate 4, so that the notch 3 is semi-open, and a thermometer 5 is installed on one side of the installation box 1, and a sub-plate 6 is arranged on the bottom side of the installation box 1. A fixing rod 7 is also arranged at the bottom of the installation box 1 and on one side of the sub-plate 6, and a fixing plate 8 is fixed to the bottom of the fixing rod 7. A displacement meter 9 extends from the installation box 1, and the displacement meter 9 vertically passes through the fixing plate 8 downward, and the displacement meter 9 emits a light beam at a fixed time.

[0029] Furthermore, the installation box 1 is installed at a node position of the bridge to detect the health of the bridge.

[0030] Furthermore, a receiving device capable of receiving a light beam is placed at the position corresponding to the displacement meter 9 on the bridge structure. The light beam emitted by the displacement meter 9 at regular intervals is reflected, and the amplitude of the bridge vibration is inferred by measuring the changes in the interference fringes between the reflected light beam and the incident light beam, thereby judging the health of the bridge.

[0031] See attached Figure 1-2 The thermometer 5 passes through the gap and is located on the top of the bottom plate 4, and the side of the thermometer 5 is close to the side of the bridge.

[0032] Furthermore, when the thermometer 5 passes through the gap and is located on the top of the base plate 4, the side of the thermometer 5 is close to the bridge, reducing the measurement error of the thermometer 5. Compared with screw fixing, this method is more flexible and can continuously adjust the position of the thermometer 5 and the test surface of the thermometer 5 to ensure that the temperature test data is stable and accurate and reduce the test error.

[0033] See attached Figure 2-3 Two pull wires 10 extend from the side of the sub-plate 6 facing the displacement meter 9. The other end of the pull wire 10 is provided with a fixed head 13. The fixed head 13 is fixed on the bridge to make the pull wire 10 tense. A slidable slide plate 11 is provided on the two pull wires 10. Both ends of the slide plate 11 are bent to form a return hook 12. The return hooks 12 on both sides hook the pull wire 10 so that the slide plate 11 can be suspended on the pull wire 10.

[0034] Furthermore, the light beam emitting end of the displacement meter 9 is pointed vertically downward, and the displacement distance of the bridge is detected by regularly emitting light beams, thereby knowing the deviation position of the bridge, wherein a slide plate 11 is provided at the bottom of the corresponding displacement meter 9, and the slide plate 11 is in a relatively constrained state, and the slide plate 11 is mounted on the guy wire 10, so that the slide plate 11 can only move back and forth on the guy wire 10. When the bridge body vibrates, the bottom end of the displacement meter 9 is constrained to avoid large swings of the displacement meter 9 due to the vibration of the bridge body, thereby avoiding large gaps between the measured data.

[0035] See attached Figure 4 , including the following structure: the installation box 1 is provided with a collection chip, a wireless transmission module and a processing chip inside, and the three are connected by electrical signals;

[0036] The above structure also includes the following monitoring method:

[0037] Step 1: Fix the installation box 1 to the corresponding bridge node, and fix the extension plate 2 to the bottom surface of the bridge node, so that the side of the thermometer 5 can be close to the bridge to monitor the bridge temperature in real time;

[0038] Step 2: Fix the sub-plate 6 at the bottom of the installation box 1 to the side of the bridge, and pull the cable 10 to make it tight. The fixed head 13 at the other end of the cable 10 is fixed to the bridge. Pass the displacement meter 9 through the slide plate 11 to make the slide plate 11 in a relatively stable state. When the vehicle is moving on the bridge deck, the vibration of the bridge body is transmitted to the displacement meter 9. The displacement meter 9 emits a light beam at a fixed time and collects the reflected light beam data.

[0039] Step 3: The acquisition chip built into the installation box 1 collects the temperature and displacement deviation data in steps 1 and 2, and transmits the data to the terminal wirelessly.

[0040] The working principle of the utility model is: the installation box 1 is installed on the node of the bridge, the displacement meter 9 and the thermometer 5 on the installation box 1 work together, the thermometer 5 monitors the bridge temperature in real time, the displacement meter 9 monitors the deviation angle of the bridge, and the built-in acquisition chip of the installation box 1 transmits the two data to the terminal wirelessly, realizing the function of simultaneously collecting multiple data, and the displacement meter 9 and the thermometer 5 working together can reduce the occupancy of the bridge structure and realize dual-function synchronous detection.

[0041] The above is only a preferred embodiment of the present invention. It should be noted that, for ordinary technicians in the technical field, several improvements and modifications can be made without departing from the principle of the present invention, and these improvements and modifications should also be regarded as the protection scope of the present invention. The structures, devices and operating methods not specifically described and explained in the present invention shall be implemented according to the conventional means in the field unless otherwise specified and limited.

Claims

1. A bridge structure health monitoring device, comprising an installation box (1), characterized in that: One side of the top of the installation box (1) extends to form an extension plate (2), the top far end of the extension plate (2) is provided with a hollow notch (3), the bottom of the notch (3) is connected to a bottom plate (4), the side of the bottom plate (4) is left empty, so that the notch (3) is semi-open, and a thermometer (5) is installed on one side of the installation box (1); A sub-plate (6) is arranged on the side of the bottom of the installation box (1), a fixing rod (7) is arranged on the bottom of the installation box (1) and on one side of the sub-plate (6), a fixing plate (8) is fixed to the bottom of the fixing rod (7), a displacement meter (9) extends out of the installation box (1), the displacement meter (9) vertically passes through the fixing plate (8) downward, and the displacement meter (9) emits a light beam at a fixed time.

2. A bridge structure health monitoring device according to claim 1, characterized in that: The thermometer (5) passes through the gap and is located on the top of the bottom plate (4), and the side of the thermometer (5) is in close contact with the side of the bridge.

3. A bridge structure health monitoring device according to claim 1, characterized in that: Two tension wires (10) extend from one side of the auxiliary plate (6) facing the displacement meter (9), and the other end of the tension wire (10) is provided with a fixed head (13), and the fixed head (13) is fixed on the bridge, so that the tension wire (10) is tense.

4. A bridge structure health monitoring device according to claim 3, characterized in that: A slidable slide plate (11) is arranged on the two pull lines (10), and the two ends of the slide plate (11) are bent to form a hook (12). The hooks (12) on both sides hook the pull lines (10), so that the slide plate (11) can be suspended on the pull lines (10).

5. The bridge structure health monitoring device according to any one of claims 1 to 4, characterized in that: Includes the following structures: The installation box (1) is provided with a collection chip, a wireless transmission module and a processing chip inside, and the three are connected via electrical signals.

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