Device and method for detecting early strength of bridge concrete

Abstract

The invention discloses a bridge concrete early strength detection device and a bridge concrete early strength detection method, belongs to the related technical field of physical analysis and testing of concrete, and comprises the bridge concrete early strength detection device and the bridge concrete early strength detection method. The device comprises a moving unit, a positioning unit and a detecting unit. The method adopts the device and a control system, and the system comprises a controller, a communication module and a mobile terminal. The method mainly comprises the following steps: assembling the rebound apparatus, moving the device, receiving configuration, detecting the rebound apparatus, acquiring images by the camera module, moving the detection unit, disassembling the rebound apparatus and the like. According to the invention, multi-point detection can be automatically carried out in a detection area, and manpower consumption is greatly reduced.

Description

Technical Field

[0001] This invention relates to the technical field of concrete physical analysis and testing, and in particular to a device and method for detecting the early strength of bridge concrete. Background Technology

[0002] Early concrete strength is a core indicator for evaluating the hardening performance of bridge construction materials, specifically referring to the compressive strength formed by concrete materials in the early curing stage (usually 3-28 days).

[0003] In strength testing, a crucial step is to use a rebound hammer to inspect the test sites on the surface, and this testing must be conducted according to relevant standards. On the concrete component being tested, multiple stamps are typically used to mark these points. Figure 6 The test area 5 shown has a numbered area 51 at its upper part, and multiple test circles 52 arranged in a rectangular array below the numbered area 51, with the same row and column spacing. For rebound hammers, the most common type is the mechanical rebound hammer, which has a scale. Furthermore, because this type of instrument is quite precise, it is usually stored in a storage box.

[0004] In the existing technology, during testing, staff need to use a rebound hammer to test within each test circle 52 in the test area 5 and record the readings of the rebound hammer. Since the rebound hammer itself has a certain weight, and the impact rod of the rebound hammer needs to be pressed hard against the test surface during testing, testing a point in a single test area 5 will consume a lot of physical strength. When testing multiple test areas 5, the physical strength consumed is even greater. Summary of the Invention

[0005] To address the aforementioned shortcomings, this invention provides a device and method for detecting the early strength of bridge concrete, which can automatically perform multi-point detection in the test area, significantly reducing manpower consumption.

[0006] In order to achieve the objectives of this invention, the following technologies are proposed: A device for detecting the early strength of bridge concrete, comprising: The mobile unit includes a platform with multiple rollers on both sides of its bottom end, a first linear mechanism vertically arranged on all four sides of the platform, an anti-slip plate at its output end, and a control box on the upper surface of the platform. The positioning unit is located on the upper part of the vehicle board and includes a scissor lift platform. The upper part of the scissor lift platform is provided with a second linear mechanism, and its sliding end is vertically provided with a third linear mechanism. The detection unit, located at the output end of the third linear mechanism, includes a lifting plate. A fourth linear mechanism is located at the end of the upper surface of the lifting plate that is away from the test surface during operation. A pressure plate is provided at the output end of the fourth linear mechanism to press the rebound hammer's impact rod against the test surface. Above the lifting plate, a fifth linear mechanism and a camera module are also provided along its length. The fifth linear mechanism is vertically arranged, and its output end is provided with a limiting plate. The lower end surface of the limiting plate has an arc surface that matches the outer periphery of the rebound hammer. The camera module is used to acquire the scale image of the rebound hammer.

[0007] Furthermore, the upper surface of the vehicle panel is also provided with a pair of inclined plates spaced apart at both ends of the control box, and a handle is fixed between the inclined plates.

[0008] A method for detecting the early strength of bridge concrete employs a control system and the aforementioned bridge concrete early strength detection device. The control system includes a controller installed in a control box. The controller is electrically connected to a first linear mechanism, a scissor lift platform, a second linear mechanism, a third linear mechanism, a fourth linear mechanism, a fifth linear mechanism, and a camera module, and communicates with the camera module via data.

[0009] The method includes the following steps: S100: A rebound hammer is mounted on the detection unit; S200: Moving device, which aligns the rebound hammer with the test circle in the lower left corner of the test area; S300: The controller receives data on the number of rows n, the number of columns m, and the test interval j; S400: The controller controls the fourth linear mechanism, causing the pressure plate to push the rebound spring, compressing the impact rod at its corresponding test ring. Then, the controller continues to control the fourth linear mechanism to retract the pressure plate, releasing the compression of the impact rod, and the rebound spring returns to its original position. The controller then controls the camera module to take a picture and receive the captured image. S500: The controller controls the second and third linear mechanisms to move the detection unit multiple times. Each movement makes the position of the impact rod correspond to the next test circle in turn. After each movement, S400 is executed again until the rebound hammer has completed the detection and image reception of the position of each test circle. S600: Determine if there are other areas that need to be inspected in the current inspection job. If yes, return to S200; otherwise, execute S700. S700: Remove the rebound hammer from the detection unit.

[0010] Furthermore, S100 includes: The controller controls the fifth linear mechanism to raise the limit plate; Remove the rebounder from its storage box and place it on the lifting plate with the scale facing upwards; The controller controls the fifth linear mechanism to lower the limit plate, so that the distance between the top of the arc surface of the limit plate and the lifting plate is the same as the outer diameter of the cylindrical part of the rebounder body.

[0011] Furthermore, the S200 includes: S210: Move the device to one side of the test area, and the distance between the impact rod and the test surface is less than 1cm. The controller controls the scissor lift platform so that when the output end of the third linear mechanism outputs the minimum stroke, the height of the impact rod is within the height range of the lowest test circle. S220: Continue moving the device so that the axis of the impact rod intersects the area within the test circle in the lower left corner of the test area.

[0012] Furthermore, after S220 is completed, the controller controls all the first linear mechanisms to push the anti-slip plate to the ground, fixing the bottom of the device, and then executes S300.

[0013] Furthermore, the S500 includes: S510: Create variables x and y, and initialize x=1 and y=1; S520: The controller controls the second linear mechanism to move the detection unit horizontally to the right by a distance j. S530: Set x = x + 1, then execute S400 once; S540: Determine if x = m. If yes, execute S550; otherwise, return to S520. S550: Make y = y + 1; S560: Determine if y = n + 1. If yes, S500 ends; otherwise, S570 is executed. S570: Set x=1, and the controller controls the detection unit to move horizontally to the left by a distance of j×(m-1); S580: The controller controls the third linear mechanism to move the detection unit vertically upward by a distance j, then executes S400 once, and then returns to S520.

[0014] Furthermore, the S700 includes: The controller controls the fifth linear mechanism to raise the limit plate; Remove the rebound spring and place it in its storage box.

[0015] The beneficial effects of this technical solution are as follows: 1. The bridge concrete early strength testing device can automatically complete the testing of all points in the entire test area without the need for manual hand-held rebound hammer testing. In addition, when the entire device moves between different test areas, the moving unit is equipped with rollers, so it does not consume much physical strength. Overall, it can significantly reduce the physical exertion of the staff.

[0016] 2. The detection method described in this application allows for the configuration of different numbers of test circles, columns, and spacings based on the actual conditions of the test area, resulting in strong versatility in the detection.

[0017] 3. It can make full use of the rebound hammer already used in manual testing, making the process of upgrading the early strength testing method of concrete simpler and more convenient. Attached Figure Description

[0018] Figure 1 A perspective view of a bridge concrete early strength testing device according to an embodiment of this application is shown.

[0019] Figure 2 A perspective view of the detection unit of the bridge concrete early strength detection device according to an embodiment of this application is shown.

[0020] Figure 3 This paper illustrates the architecture diagram of the control system associated with the bridge concrete early strength detection device according to an embodiment of this application.

[0021] Figure 4 The main flowchart of the bridge concrete early strength detection method according to an embodiment of this application is shown.

[0022] Figure 5 A flowchart of the bridge concrete early strength detection method S600 according to an embodiment of this application is shown.

[0023] Figure 6 A schematic diagram of the survey area in the background of this application is shown.

[0024] The diagram is labeled as follows: 1-Moving unit, 11-Car platform, 12-Roller, 13-First linear mechanism, 14-Anti-slip plate, 15-Control box, 16-Sloping plate, 17-Linking rod, 18-Holding rod, 2-Positioning unit, 21-Scissor lift platform, 22-Table surface, 23-Second linear mechanism, 24-Third linear mechanism, 3-Detection unit, 31-Lifting plate, 32-Fourth linear mechanism, 33-Pressure plate, 34-Inverted L-shaped frame, 35-Horizontal plate, 36-Fifth linear mechanism, 37-Limiting plate, 38-Camera module, 4-Rebound hammer, 41-Impact rod, 42-Scale, 5-Test area, 51-Numbered area, 52-Test circle. Detailed Implementation

[0025] The present application will be further described below with reference to the accompanying drawings and embodiments.

[0026] like Figure 1 , Figure 2 The device shown is a bridge concrete early strength testing device, including a moving unit 1, a positioning unit 2, and a testing unit 3.

[0027] The mobile unit 1 includes a platform 11. Multiple inverted U-shaped frames are fixed on both sides of the bottom end of the platform 11. Rollers 12 are rotatably connected between the two vertical parts of the inverted U-shaped frames. A first linear mechanism 13 is vertically provided on all four sides of the platform 11. An anti-slip plate 14 is provided at the output end of the first linear mechanism 13. A control box 15 is provided on the upper surface of the platform 11, and a pair of inclined plates 16 are spaced at both ends of the control box 15. A connecting rod 17 and a gripping rod 18 are fixed between the inclined plates 16. The gripping rod 18 is located above the connecting rod 17.

[0028] The positioning unit 2 is located on the upper end of the vehicle platform 11 and includes a scissor lift platform 21. A second linear mechanism 23 is provided on the upper end of the platform 22 of the scissor lift platform 21, and a third linear mechanism 24 is vertically provided on the sliding end of the second linear mechanism 23.

[0029] The detection unit 3 is located at the output end of the third linear mechanism 24 and includes a lifting plate 31. When working, the upper end of the lifting plate 31 is located at the end away from the test surface and is provided with a fourth linear mechanism 32. The output end of the fourth linear mechanism 32 is provided with a pressure plate 33, which is used to press the impact rod 41 of the rebound hammer 4 against the test surface. One side of the upper end of the lifting plate 31 is fixed with an inverted L-shaped frame 34. One end of the horizontal part of the inverted L-shaped frame 34 is provided with a horizontal plate 35. One end of the horizontal plate 35 is vertically provided with a fifth linear mechanism 36. The output end of the fifth linear mechanism 36 is provided with a limiting plate 37. The lower end of the limiting plate 37 is provided with an arc surface that matches the outer periphery of the rebound hammer 4. The lower end of the other end of the horizontal plate 35 is fixed with a camera module 38, which is used to acquire the scale 42 image of the rebound hammer 4.

[0030] In this embodiment, the first linear mechanism 13, the third linear mechanism 24, the fourth linear mechanism 32, and the fifth linear mechanism 36 all use single-axis linear cylinders, the second linear mechanism 23 uses a rodless linear cylinder, and the camera module 38 uses an industrial camera.

[0031] like Figure 4 This paper presents a method for detecting the early strength of bridge concrete using the aforementioned bridge concrete early strength detection device. The method also employs methods such as... Figure 3 The control system shown.

[0032] The control system includes a controller and a communication module installed in the control box 15, as well as a mobile terminal used by staff and communicating with the communication module. The controller is electrically connected to the first linear mechanism 13, the scissor lift platform 21, the second linear mechanism 23, the third linear mechanism 24, the fourth linear mechanism 32, the fifth linear mechanism 36, the camera module 38, and the communication module, and communicates with the camera module 38 and the communication module via data. In this embodiment, the controller is a PLC (Programmable Logic Controller), the communication module is a Bluetooth module, and the mobile terminal is a mobile phone.

[0033] Based on such Figure 4The main process shown is as follows: the method for testing the early strength of bridge concrete is operated according to the following steps, wherein the area being tested is still based on... Figure 6 For example, the upper part of test area 5 is divided into numbered areas 51, and below the numbered areas 51, multiple test circles 52 are arranged in a rectangular array: S100: The rebound hammer 4 is assembled on the detection unit 3. Specifically, the communication module receives the instruction from the mobile terminal and sends it to the controller. The controller controls the fifth linear mechanism 36 to raise the limit plate 37. The operator takes the rebound hammer 4 out of its storage box and places it on the lifting plate 31 with the scale 42 facing upward. Then the communication module receives the instruction from the mobile terminal and sends it to the controller. The controller controls the fifth linear mechanism 36 to lower the limit plate 37 so that the distance between the top of the arc surface of the limit plate 37 and the lifting plate 31 is the same as the outer diameter of the cylindrical part of the rebound hammer 4 body. S200: Moving device, so that the rebound hammer 4 corresponds to the test circle 52 in the lower left corner of the test area 5; Specifically, S200 includes: S210: The operator holds the handle 18 and moves the device to one side of the test area 5, and the distance between the impact rod 41 and the test surface is less than 1cm. The communication module receives the instruction from the mobile terminal and sends it to the controller. The controller controls the scissor lift 21 so that when the output end of the third linear mechanism 24 outputs the minimum stroke, the height of the impact rod 41 is within the height range of the lowest test circle 52. S220: The operator holds the handle 18 and continues to move the device so that the axis of the striking rod 41 intersects the area within the test circle 52 in the lower left corner of the test area 5. The communication module receives the instruction from the mobile terminal and sends it to the controller. Then the controller controls all the first linear mechanisms 13 to push the anti-slip plate 14 to the ground and fix the bottom of the device. S300: The staff inputs the three data points n (number of rows), m (number of columns), and j (test interval) into the mobile terminal. The communication module receives the n, m, and j values ​​from the mobile terminal and sends them to the controller. n and m are both integers with a minimum value of 3, and j ≥ 2cm. S400: The controller controls the fourth linear mechanism 32, causing the pressure plate 33 to push the rebound spring 4, and the impact rod 41 to compress at its corresponding test ring 52. Then the controller continues to control the fourth linear mechanism 32 to retract the pressure plate 33, causing the impact rod 41 to release the compression, the rebound spring 4 to return to its original position, and the controller controls the camera module 38 to take pictures and receive the captured images. Then the images are sent to the mobile terminal through the communication module. S500: The controller controls the second linear mechanism 23 and the third linear mechanism 24 to move the detection unit 3 multiple times. Each movement causes the position of the impact rod 41 to correspond to the next test circle 52 in sequence. After each movement, S400 is executed again until the rebound device 4 completes the detection and image reception of the position of each test circle 52. Specifically, such as Figure 5 As shown, S500 includes: S510: Create variables x and y, and initialize x=1 and y=1; S520: The controller controls the second linear mechanism 23 to move the detection unit 3 horizontally to the right by a distance j. S530: Set x = x + 1, then execute S400 once; S540: Determine if x = m. If yes, execute S550; otherwise, return to S520. S550: Make y = y + 1; S560: Determine if y = n + 1. If yes, S500 ends; otherwise, S570 is executed. S570: Set x=1, and the controller controls the detection unit 3 to move horizontally to the left by a distance of j×(m-1); S580: The controller controls the third linear mechanism 24 to move the detection unit 3 vertically upward by a distance j, then executes S400 once, and then returns to S520; S600: The staff determines whether there are other test areas 5 that need to be tested in the current testing operation. If yes, return to S200; otherwise, execute S700. S700: Remove the rebound spring 4 from the detection unit 3. Specifically, the communication module receives the instruction from the mobile terminal and sends it to the controller. The controller controls the fifth linear mechanism 36 to raise the limit plate 37. The worker removes the rebound spring 4 and places it in its storage box.

[0034] After the test is completed using the early strength testing method for bridge concrete, staff can view all the scale 42 images on a mobile terminal, which facilitates reading collection and subsequent analysis.

[0035] The above are only some of the embodiments listed in this application and are not intended to limit this application.

Claims

1. A device for detecting the early strength of bridge concrete, characterized in that, include: The mobile unit (1) includes a car plate (11), with multiple rollers (12) on both sides of its bottom end. A first linear mechanism (13) is vertically arranged on all four sides of the car plate (11), and an anti-slip plate (14) is provided at its output end. A control box (15) is provided on the upper surface of the car plate (11). The positioning unit (2) is located on the upper end of the vehicle platform (11) and includes a scissor lift platform (21). The upper end of the platform (22) of the scissor lift platform (21) is provided with a second linear mechanism (23), and its sliding end is provided with a third linear mechanism (24). The detection unit (3) is located at the output end of the third linear mechanism (24) and includes a lifting plate (31). When working, the upper end of the lifting plate (31) is located at the end away from the test surface and is provided with a fourth linear mechanism (32). The output end of the fourth linear mechanism (32) is provided with a pressure plate (33) for pressing the impact rod (41) of the rebound hammer (4) onto the test surface. Above the lifting plate (31) is also provided a fifth linear mechanism (36) and a camera module (38) arranged along its length. The fifth linear mechanism (36) is set vertically and its output end is provided with a limiting plate (37). The lower end of the limiting plate (37) is provided with an arc surface that matches the outer periphery of the rebound hammer (4). The camera module (38) is used to acquire the scale (42) image of the rebound hammer (4).

2. The bridge concrete early strength testing device according to claim 1, characterized in that, The upper surface of the vehicle plate (11) is also provided with a pair of inclined plates (16) spaced at both ends of the control box (15), and a handle (18) is fixed between the inclined plates (16).

3. The bridge concrete early strength testing device according to claim 1, characterized in that, An inverted L-shaped frame (34) is fixed on one side of the upper surface of the lifting plate (31), and a horizontal plate (35) is provided at one end of its horizontal part. The fifth linear mechanism (36) is located at one end of the horizontal plate (35), and the camera module (38) is fixed on the lower surface of the other end of the horizontal plate (35).

4. A method for detecting the early strength of bridge concrete, characterized in that, The method employs a control system and the bridge concrete early strength detection device according to any one of claims 1 to 3. The control system includes a controller installed in a control box (15). The controller is electrically connected to the first linear mechanism (13), the scissor lift platform (21), the second linear mechanism (23), the third linear mechanism (24), the fourth linear mechanism (32), the fifth linear mechanism (36), and the camera module (38), and communicates data with the camera module (38). The method includes the following steps: S100: A rebound hammer (4) is mounted on the detection unit (3); S200: Moving device, so that the rebound hammer (4) corresponds to the test circle (52) in the lower left corner of the test area (5); S300: The controller receives data on the number of rows n, the number of columns m, and the test interval j; S400: The controller controls the fourth linear mechanism (32) to push the pressure plate (33) to push the rebound spring (4), and the impact rod (41) is compressed at its corresponding test ring (52). Then the controller continues to control the fourth linear mechanism (32) to retract the pressure plate (33), so that the impact rod (41) is released from compression, the rebound spring (4) returns to its original position, and the controller controls the camera module (38) to take pictures and receive the captured images. S500: The controller controls the second linear mechanism (23) and the third linear mechanism (24) to move the detection unit (3) multiple times. Each movement causes the position of the impact rod (41) to correspond to the next test circle (52) in turn. After each movement, S400 is executed again until the rebound device (4) completes the detection and image reception of the position of each test circle (52). S600: Determine if there are other test areas (5) that need to be tested in the current test operation. If yes, return to S200; otherwise, execute S700. S700: Remove the rebound hammer (4) from the detection unit (3).

5. The method for detecting early strength of bridge concrete according to claim 4, characterized in that, S100 includes: The controller controls the fifth linear mechanism (36) to raise the limit plate (37); Take the rebounder (4) out of its storage box and place it on the lifting plate (31) with the scale (42) facing upward; The controller controls the fifth linear mechanism (36) to lower the limit plate (37) so that the distance between the top of the arc surface of the limit plate (37) and the lifting plate (31) is the same as the outer diameter of the cylindrical part of the main body of the rebounder (4).

6. The method for detecting early strength of bridge concrete according to claim 4, characterized in that, S200 includes: S210: Move the device to one side of the test area (5), and the distance between the impact rod (41) and the test surface is less than 1cm. The controller controls the scissor lift platform (21) so that when the output end of the third linear mechanism (24) outputs the minimum stroke, the height of the impact rod (41) is within the height range of the lowest test circle (52). S220: Continue to move the device so that the axis of the striking rod (41) intersects the area within the test circle (52) in the lower left corner of the test area (5).

7. The method for detecting early strength of bridge concrete according to claim 6, characterized in that, After S220 is completed, the controller controls all the first linear mechanisms (13) to push the anti-slip plate (14) to the ground, so that the bottom of the device is fixed, and then S300 is executed.

8. The method for detecting early strength of bridge concrete according to claim 4, characterized in that, The S500 includes: S510: Create variables x and y, and initialize x=1 and y=1; S520: The controller controls the second linear mechanism (23) to move the detection unit (3) horizontally to the right by a distance j. S530: Set x = x + 1, then execute S400 once; S540: Determine if x = m. If yes, execute S550; otherwise, return to S520. S550: Make y = y + 1; S560: Determine if y = n + 1. If yes, S500 ends; otherwise, execute S570. S570: Make x=1, and the controller controls the detection unit (3) to move horizontally to the left by a distance of j×(m-1); S580: The controller controls the third linear mechanism (24) to move the detection unit (3) vertically upward by a distance j, then executes S400 once, and then returns to S520.

9. The method for detecting early strength of bridge concrete according to claim 4, characterized in that, The S700 includes: The controller controls the fifth linear mechanism (36) to raise the limit plate (37); Remove the rebounder (4) and place it in its storage box.

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