A device and method for testing the concrete strength of highway bridge construction

Abstract

This invention discloses a concrete strength testing device and method for highway bridge construction, which reduces the interference of human operation on the testing process and improves the stability and accuracy of rebound data. The concrete strength testing device for highway bridge construction includes a moving module that can move on the ground; a lifting module fixed to the moving module; a horizontal position adjustment module mounted on the lifting module, which drives the horizontal position adjustment module to slide vertically; and a detection module mounted on the horizontal position adjustment module, which drives the detection module to move linearly on a horizontal plane along a direction parallel to and / or perpendicular to the movement of the moving module.

Description

Technical Field

[0001] This invention relates to the field of highway bridge construction testing technology, and in particular to a concrete strength testing device and method for highway bridge construction. Background Technology

[0002] In the field of transportation infrastructure engineering such as highways and bridges, the strength of concrete components is a core indicator for ensuring the safety, stability, and service life of the engineering structure. Therefore, accurate strength testing of concrete components in highways and bridges is crucial. Currently, among the various technical methods for testing the strength of concrete components, rebound hammer testing is widely used in some strength testing projects due to its relatively convenient operation and low cost.

[0003] The existing method for testing the strength of concrete components based on rebound hammers involves the operator selecting a preset area on the surface of the concrete component, choosing multiple test points within that area, holding the rebound hammer by hand with its testing end pressed against each test point, applying pressure to the rebound hammer to retract the testing end, releasing the rebound hammer after the force application is complete, and using the rebound characteristics of the rebound hammer to obtain rebound data. This data, combined with the carbonation depth test data of the concrete component, is then used to determine the strength of the concrete component through a relevant calculation model.

[0004] However, the existing testing methods have the following drawbacks. Since the entire testing process relies on operators to manually perform a series of actions such as handheld positioning, force application, and release, on the one hand, the magnitude and direction of the applied force, as well as the fit between the rebound hammer and the testing point, are difficult to control precisely, resulting in high operational difficulty; on the other hand, the uncertainty of human operation directly affects the stability and accuracy of the rebound data, thus leading to lower accuracy in the final concrete strength determination results. Summary of the Invention

[0005] Therefore, in order to overcome the above-mentioned shortcomings, the present invention provides a concrete strength testing device and method for highway bridge construction, which can realize the automatic positioning of the testing module and the testing point, so as to reduce the interference of human operation on the testing process and improve the stability and accuracy of rebound data.

[0006] On one hand, the present invention provides a concrete strength testing device for highway bridge construction, comprising: A mobile module that can move on the ground; A lifting module, which is fixed on the moving module; A horizontal position adjustment module is mounted on a lifting module, which drives the horizontal position adjustment module to slide vertically. The detection module is mounted on the horizontal position adjustment module. The horizontal position adjustment module drives the detection module to move linearly on the horizontal plane in a direction parallel to and / or perpendicular to the movement of the moving module.

[0007] Furthermore, the lifting module includes: First power unit; The first slide is connected to the first power device, which drives the first slide to slide vertically. The horizontal position adjustment module is fixed on the first slide.

[0008] Furthermore, the horizontal position adjustment module includes: Second power unit; The second slide is mounted on the second power unit and is driven by the second power unit to move linearly in a direction parallel to the movement of the moving module. The third power unit is fixedly installed on the second carriage; The third slide is mounted on the third power unit, which drives the third slide to move linearly in a direction perpendicular to the movement of the moving module.

[0009] Furthermore, the detection module includes: A fourth power unit is mounted on the third carriage; The rebound spring is mounted on the fourth power unit, which drives the rebound spring to move linearly in a direction parallel to the movement of the moving module.

[0010] Furthermore, the detection device also includes a telescopic support device located at the bottom of the movable module.

[0011] Furthermore, the detection device also includes a control module, which is communicatively connected to the moving module, the telescopic support device, the lifting module, the horizontal position adjustment module, and the detection module. The control module acquires the detection area parameters, determines the spatial coordinate sequence of the detection points based on the detection area parameters, and generates a displacement control signal for the detection module according to the spatial coordinate sequence of the detection points, so that the moving module, the lifting module and the horizontal position adjustment module drive the detection module to move to each detection point position one by one according to the preset path. When the detection module moves to the detection point, the control module obtains the real-time contact pressure between the detection module and the component surface, calculates the advancement speed of the detection module based on the real-time contact pressure, generates a first advancement control signal based on the advancement speed and sends it to the detection module so that the detection module can perform corresponding actions based on the first advancement control signal. Simultaneously, the propulsion termination judgment is made based on the real-time contact pressure, and a second propulsion control signal is generated based on the propulsion termination judgment result and sent to the detection module so that the detection module can perform the corresponding action based on the second propulsion control signal. When the detection module stops advancing, the control module reads the rebound value of the detection module.

[0012] On the other hand, the present invention also provides a method for testing the strength of concrete used in highway bridge construction. This method employs the aforementioned concrete strength testing device for highway bridge construction, and includes the following steps: The control module acquires the detection area parameters of the concrete component to be tested, and determines the spatial coordinate sequence of detection points distributed according to a preset rule within the detection area based on the detection area parameters. The control module generates a displacement control signal for the detection module based on the spatial coordinate sequence of the detection points and sends it to the moving module, the lifting module and the horizontal position adjustment module to drive the detection module to move to the spatial coordinate position corresponding to each detection point one by one along a preset path. When the detection module moves to the current detection point position, the control module obtains the real-time contact pressure between the detection module and the surface of the concrete component; Based on the real-time contact pressure, the control module calculates the propulsion speed of the fourth power device in the detection module through a preset pressure control algorithm, and generates a first propulsion control signal according to the propulsion speed and sends it to the detection module to control the rebound hammer to perform a propulsion action on the surface of the concrete component. During the propulsion process, the control module determines whether to terminate the propulsion based on the real-time contact pressure; when the real-time contact pressure meets the preset triggering conditions, the control module generates a second propulsion control signal and sends it to the detection module to control the fourth power device to stop propulsion. After the fourth power unit stops advancing, the control module reads and records the rebound value generated by the rebound device at the current detection point.

[0013] The present invention has the following advantages: When the present invention is used to test the concrete strength of highway bridge construction, the cooperation of the moving module, the lifting module and the horizontal position adjustment module can realize the automatic adjustment of the test module in space, reduce the difficulty of the test operation, improve the convenience of the test process, realize the automatic positioning of the test module and the test point, reduce the interference of human operation on the test process, and improve the stability and accuracy of the rebound data.

[0014] The control module receives parameters from the detection area and automatically calculates and generates a sequence of spatial coordinates for the detection points. This ensures that the detection points are evenly distributed within the detection area, and the traversal order can be preset as needed (line-by-line scanning, zigzag scanning, etc.), providing a more reliable basis for concrete strength assessment. Based on the spatial coordinate sequence of the detection points, the control module sends displacement control signals to the moving module, lifting module, and horizontal position adjustment module, driving the detection module to align all detection points along a preset path. Simultaneously, the control module automatically controls and executes actions such as the advancement of the detection module, pressure adjustment, and rebound value reading, solving the problem of high manual operation difficulty and improving the automation and efficiency of the detection process. Based on real-time collected contact pressure, the control module dynamically adjusts the advancement speed of the detection module using a proportional-integral (PI) control algorithm, improving the stability and accuracy of the rebound data.

[0015] The control module can use visual data to assist or automatically determine the starting reference point and range of the detection area, and identify obvious defects or uneven areas on the surface. The distance sensing unit may include a laser displacement sensor or an ultrasonic sensor installed near the detection end of the rebound hammer. It is used to non-contactly measure the distance between the detection end and the surface as the rebound hammer approaches the component surface. The control module can use this distance information to control the approach speed and stopping position of the rebound hammer before contact occurs, avoiding impact on the sensor or component surface due to rapid collision.

[0016] The control module retracts the rebound hammer from the fourth power unit of the detection module, drives the detection module to the next detection point and completes the detection, until all points in the sequence have been traversed. After completing the detection of all points, the control module can automatically process the collected rebound values ​​(such as calculating the average value and standard deviation, and removing outliers), and can combine the automatically or manually measured carbonation depth values ​​with the built-in standard strength test curve formula to automatically calculate and output the estimated concrete strength value of the detection area and a complete test report. After the detection task is completed, the control module controls each module to return to the safe initial position and retracts the telescopic support device, restoring the device to a movable state, and repeats the above process. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the detection device; Figure 2 yes Figure 1 A side view of the detection device shown; Figure 3 yes Figure 1 A schematic diagram of the horizontal position adjustment module in the detection device shown; Figure 4 yes Figure 1 A schematic diagram of the detection module in the detection device shown; Figure 5 yes Figure 1 A schematic diagram of the lifting module in the detection device shown; Figure 6 yes Figure 1 A schematic diagram of the control logic of the detection device shown. In the picture: 100. Mobile module; 200. Lifting module; 210. Frame; 220. First carriage; 230. First power unit; 300. Horizontal position adjustment module; 310. Second power unit; 320. Second carriage; 330. Third power unit; 340. Third carriage; 400. Detection module; 410. Fourth power unit; 420. Rebound hammer; 500. Telescopic support device; 600. Sensing module; 700. Control module. Detailed Implementation

[0018] The embodiments of this application are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this application, and should not be construed as limiting this application.

[0019] In this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, without necessarily requiring or implying any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus.

[0020] As described in the background section, existing testing methods have the following drawbacks. Since the entire testing process relies on operators manually performing a series of actions such as handheld positioning, force application, and release, on the one hand, the magnitude and direction of the applied force, as well as the fit between the rebound hammer and the testing point, are difficult to control precisely, resulting in significant operational challenges; on the other hand, the uncertainty of human operation directly affects the stability and accuracy of the rebound data, leading to lower precision in the final concrete strength determination results.

[0021] Example 1: Therefore, in order to solve the above-mentioned technical problems existing in the prior art, this embodiment provides a concrete strength testing device for highway bridge construction. The testing device is used to test the strength of concrete components in vertical planes such as bridge piers and beam sides. Figure 1 , 2 As shown, the detection device includes: Mobile module 100, which is movable on the ground; Lifting module 200, which is fixed on the moving module; A horizontal position adjustment module 300 is mounted on a lifting module, and the lifting module drives the horizontal position adjustment module to slide vertically. The detection module 400 is mounted on the horizontal position adjustment module. The horizontal position adjustment module drives the detection module to move linearly on the horizontal plane in a direction parallel to and / or perpendicular to the movement of the moving module.

[0022] In this embodiment, the operator first controls the moving module to move on the ground, bringing the entire testing device to the designated testing area of ​​the concrete component to be tested, completing the initial positioning of the entire device. After the overall positioning is complete, the lifting module is activated. Since the lifting module is fixed on the moving module and the horizontal position adjustment module is set on the lifting module, the lifting module will drive the horizontal position adjustment module and the connected testing module to slide vertically until the height of the testing module matches the height of the preset testing point on the concrete component. After the height adjustment is completed, the horizontal position adjustment module is activated. This module drives the testing module to move in the horizontal plane. The direction of movement can be selected according to the testing point position requirements, either parallel to the direction of movement of the moving module, perpendicular to the direction of movement of the moving module, or a combination of both linear movements, ultimately aligning the testing end of the testing module with the preset testing point. After the testing module completes the alignment, the testing module performs concrete strength testing operations (such as rebound data acquisition). In this embodiment, the mobile module can adopt a wheeled mobile mechanism, specifically including a mounting base, drive wheels, casters, and a drive motor. The mounting base is used to fix the lifting module. The drive wheels and casters are symmetrically mounted on the bottom of the mounting base. The drive motor is connected to the drive wheels, driving them to rotate and achieve overall movement of the mobile module. The casters are used to adjust the direction of movement, improving the flexibility of the device's movement. Simultaneously, the drive wheels can be equipped with braking components. When the mobile module reaches the designated detection area, the braking components lock the drive wheels, preventing displacement of the device during detection and ensuring detection stability. Furthermore, the mobile module can also adopt a tracked mobile mechanism depending on the actual working conditions. The tracked structure increases the contact area with the ground, reduces the pressure per unit area, prevents the device from sinking on soft ground, and improves the device's passability on uneven ground. The tracked mobile mechanism is also equipped with a drive motor and a braking unit.

[0023] This embodiment achieves automated spatial adjustment of the detection module through the cooperation of the moving module, lifting module, and horizontal position adjustment module. This reduces the difficulty of detection operation, improves the convenience of the detection process, enables automatic positioning of the detection module and detection point, reduces interference from human operation in the detection process, and improves the stability and accuracy of the rebound data.

[0024] For example, such as Figure 5 As shown, the lifting module includes: First power unit 230; The first slide 220 is connected to the first power device, which drives the first slide to slide vertically. The horizontal position adjustment module is fixed on the first slide.

[0025] Specifically, the lifting module may also include a support frame 210, which is fixedly installed on the movable module. The first slide is slidably fitted on the support frame, and the first power device is installed on the support frame. In this embodiment, the first power device may be a ball screw transmission mechanism, a hydraulic lifting mechanism, or a gear and rack transmission mechanism.

[0026] For example, such as Figure 3 As shown, the horizontal position adjustment module includes: Second power unit 310; The second slide 320 is mounted on the second power unit and is driven by the second power unit to move linearly in a direction parallel to the movement of the moving module. The third power unit 330 is fixedly installed on the second carriage; The third slide 340 is mounted on the third power unit and is driven by the third power unit to move linearly in a direction perpendicular to the movement of the moving module.

[0027] Specifically, the second and third power units can be selected from ball screw transmission mechanisms, synchronous belt transmission mechanisms, or gear and rack transmission mechanisms, and the two can adopt the same type or different types of transmission mechanism combinations.

[0028] For example, such as Figure 4 As shown, the detection module includes: The fourth power unit 410 is mounted on the third carriage; The rebounder 420 is mounted on the fourth power unit and is driven by the fourth power unit to move linearly in a direction parallel to the movement of the moving module.

[0029] Specifically, the fourth power unit can be selected from a ball screw drive mechanism, a synchronous belt drive mechanism, or a gear and rack drive mechanism.

[0030] In this embodiment, the detection device further includes a telescopic support device 500, which is located at the bottom of the movable module.

[0031] Once the mobile module moves the detection device to the designated detection area, it can extend and press against the ground to form a support, which can reduce the misalignment between the detection module and the detection point caused by slight displacement of the device during the detection process.

[0032] In addition, such as Figure 6 As shown, the detection device also includes a control module 700, which is communicatively connected to the moving module, the telescopic support device, the lifting module, the horizontal position adjustment module, and the detection module. The control module acquires the detection area parameters, determines the spatial coordinate sequence of the detection points based on the detection area parameters, and generates a displacement control signal for the detection module according to the spatial coordinate sequence of the detection points, so that the moving module, the lifting module and the horizontal position adjustment module drive the detection module to move to each detection point position one by one according to the preset path. When the detection module moves to the detection point, the control module obtains the real-time contact pressure between the detection module and the component surface, calculates the advancement speed of the detection module based on the real-time contact pressure, generates a first advancement control signal based on the advancement speed and sends it to the detection module so that the detection module can perform corresponding actions based on the first advancement control signal. Simultaneously, the propulsion termination judgment is made based on the real-time contact pressure, and a second propulsion control signal is generated based on the propulsion termination judgment result and sent to the detection module so that the detection module can perform the corresponding action based on the second propulsion control signal. When the detection module stops advancing, the control module reads the rebound value of the detection module.

[0033] Specifically, the method for determining the spatial coordinate sequence of detection points based on detection area parameters is as follows: The control module receives input detection area parameters, which include at least the coordinates of the starting reference point of the detection area in the world coordinate system. P 0( X 0, Y 0, Z 0) Length of the detection area along the horizontal direction (parallel to the direction of movement of the moving module) L Width along the vertical direction (perpendicular to the direction of movement of the moving module) W and the horizontal spacing Δ of the detection points. x The vertical spacing Δ y In this embodiment, the X-axis (horizontal, parallel to the component's facade and parallel to the commonly used movement direction of the moving module), the Y-axis (vertical), and the Z-axis (perpendicular to the component's facade, i.e., the normal direction) are defined. The path planning algorithm built into the control module first determines the path based on the length. L ,width W and spacing Δ x Δ y Calculate the number of detection point rows that can be accommodated in this area. m With column number n The specific calculation method is as follows: , ; Where ⌊ ⌋ represents rounding down; Subsequently, the algorithm uses the starting reference point PWith 0 as the origin, the planar coordinates of all detection points are generated according to a preset traversal order (such as line-by-line scanning, zigzag scanning, etc.). X ij , Y ij For the first i line, number j The detection points of the column (of which) i =0, 1, ..., m -1; j =0, 1, ..., n -1), its coordinates are calculated as follows: ; ; And all testing points Z Initial values ​​of axis coordinates Z ij All Z 0, this value is the initial preset height of the lifting module. During actual testing, the detection module reaches each point ( X , Y After positioning, the precise contact position perpendicular to the surface direction (Z-direction) will be ultimately determined through its own contact feedback control.

[0034] Finally, the control module will generate and store a sequence containing the three-dimensional coordinates of all detection points in sequence. P ij =( X ij , Y ij , Z ij This sequence serves as the path for driving each motion module to perform automated point-to-point detection.

[0035] Specifically, the method for calculating the propulsion speed based on the real-time contact pressure detection module is as follows: The control module uses a built-in multi-stage pressure control algorithm to control the contact pressure collected in real time. F t It compares the pressure with a preset target value and dynamically calculates the real-time propulsion speed. v t This is to achieve control over the propulsion process of the rebound hammer. The specific calculation method is as follows: Before the detection module comes into contact with the concrete surface, that is F t When =0: ; in, v 1This is the first propulsion speed.

[0036] When the detection module begins to contact the concrete surface, that is F t > F c hour, F c The control module calculates the real-time pressure error based on the preset contact determination threshold. e t : ; in, F 0 The target pressure is preset.

[0037] Then, a proportional-integral (PI) control algorithm is used to calculate the required real-time adjustment speed until the pressure error is reached. e t The absolute value of remains less than the tolerance for a preset settling time. δ F The control module pushes the rebound hammer at a second speed until the pressure threshold is reached. The contact judgment threshold, preset target pressure, pressure threshold, and other parameters can be determined through pre-calibration experiments based on the selected rebound hammer model and specifications; the proportional and integral coefficients of the PI controller can be obtained through system identification and controller tuning methods.

[0038] The control module receives parameters from the detection area and automatically calculates and generates a sequence of spatial coordinates for the detection points. This ensures that the detection points are evenly distributed within the detection area, and the traversal order can be preset as needed (line-by-line scanning, zigzag scanning, etc.), providing a more reliable basis for concrete strength assessment. Based on the spatial coordinate sequence, the control module sends displacement control signals to the moving module, lifting module, and horizontal position adjustment module, driving the detection module to align all detection points along a preset path. Simultaneously, the control module automatically controls and executes actions such as the advancement of the detection module, pressure adjustment, and rebound value reading, solving the problem of high manual operation difficulty and improving the automation and efficiency of the detection process. Based on real-time collected contact pressure, the control module dynamically adjusts the advancement speed of the detection module using a proportional-integral (PI) control algorithm, improving the stability and accuracy of the rebound data.

[0039] In addition, the detection device may also include a sensing module 600, which may include one or more combinations of a pressure sensing unit, a vision sensing unit, and a distance sensing unit, and is communicatively connected to the control module for real-time acquisition of physical quantities and status information during the detection process. The pressure sensing unit may include a pressure sensor installed on the detection end of the rebound hammer or on the thrust transmission path of the fourth power device. It is used to measure the normal contact pressure between the detection end of the rebound hammer and the surface of the concrete component in real time and transmit the pressure signal to the control module in real time. The vision sensing unit may include an industrial camera or laser scanner installed on the detection module or the horizontal position adjustment module. It is used to automatically identify the contour, boundary, and surface features of the concrete component to be tested. Based on the visual data, the control module can assist or automatically determine the starting reference point and range of the detection area and identify obvious defects or uneven areas on the surface. The distance sensing unit may include a laser displacement sensor or an ultrasonic sensor installed near the detection end of the rebound hammer. It is used to non-contactly measure the distance between the detection end and the surface when the rebound hammer approaches the component surface. The control module can use this distance information to control the approach speed and stopping position of the rebounder before contact occurs, so as to avoid impact on the sensor or component surface due to rapid collision.

[0040] Example 2: This embodiment provides a method for testing the strength of concrete used in highway bridge construction. This method employs a concrete strength testing device for highway bridge construction described in Embodiment 1. The method includes: The control module acquires the detection area parameters of the concrete component to be tested, and determines the spatial coordinate sequence of detection points distributed according to a preset rule within the detection area based on the detection area parameters. Specifically, the operator first moves the detection device to the vicinity of the concrete component to be tested via the moving module. The control module then controls the telescopic support device to extend and press against the ground, locking the device chassis. Through the human-machine interface of the control module, the operator inputs or sets the parameters for this test. These parameters include, but are not limited to, detection area parameters (at least including the coordinates of the starting reference point of the detection area in the world coordinate system, the length of the detection area in the horizontal direction, the width in the vertical direction, and the spacing between detection points in the horizontal and vertical directions), motion control parameters (movement speed and acceleration of each module), and pressure control parameters (contact judgment threshold, pre-compression target pressure, pressure control tolerance, stabilization time, constant speed loading rate, and trigger pressure threshold). Based on the received detection area parameters, the control module automatically calculates the spatial position of all test points using a built-in path planning algorithm. For specific details, please refer to the specific method for determining the spatial coordinate sequence of the test points described in Example 1.

[0041] The control module generates a displacement control signal for the detection module based on the spatial coordinate sequence of the detection points and sends it to the moving module, the lifting module and the horizontal position adjustment module to drive the detection module to move to the spatial coordinate position corresponding to each detection point one by one along a preset path. Specifically, the control module generates and sends displacement control signals according to the sequence. First, it drives the first power unit of the lifting module to move the detection module vertically (Y-axis) to the target height coordinate. Then, it drives the second power unit in the horizontal position adjustment module, which is responsible for horizontal movement (X-axis), to move the detection module horizontally to the target horizontal coordinate, aligning the rebound hammer's axis with the target point on the vertical detection surface. Finally, it controls the third power unit in the horizontal position adjustment module, which is responsible for movement perpendicular to the detection surface (Z-axis), to move the third carriage and the detection module mounted on it, adjusting the normal distance between the rebound hammer's detection end and the vertical surface to a preset distance. This position is the starting point for force application and propulsion.

[0042] When the detection module moves to the current detection point position, the control module obtains the real-time contact pressure between the detection module and the surface of the concrete component; Based on the real-time contact pressure, the control module calculates the propulsion speed of the fourth power device in the detection module through a preset pressure control algorithm, and generates a first propulsion control signal according to the propulsion speed and sends it to the detection module to control the rebound hammer to perform a propulsion action on the surface of the concrete component. During the propulsion process, the control module determines whether to terminate the propulsion based on the real-time contact pressure; when the real-time contact pressure meets the preset triggering conditions, the control module generates a second propulsion control signal and sends it to the detection module to control the fourth power device to stop propulsion. After the fourth power unit stops advancing, the control module reads and records the rebound value generated by the rebound device at the current detection point.

[0043] Specifically, after the detection module completes positioning, the control module sends a first propulsion control signal to the fourth power unit, driving the rebound hammer to slowly move towards the vertical concrete surface at a first speed. The normal contact pressure is acquired in real time via a pressure sensor. F t > F cUpon reaching the contact surface, the control module initiates proportional-integral (PI) pressure closed-loop control, calculates the pressure error, and dynamically adjusts the speed. Feedback control ensures the actual normal pressure is quickly and stably maintained near the target pre-pressure. After pre-pressure stabilization, the control module instructs the fourth power unit to push the rebound spring along the normal direction at a constant second speed, continuing to compress its internal spring. Continuous monitoring of the contact pressure is maintained. When the real-time normal contact pressure reaches the preset trigger pressure threshold, the control module immediately generates a second propulsion control signal, sending it to the fourth power unit to instantly stop and lock it. The control module simultaneously reads and records the rebound value at the current point and stores it along with the coordinates.

[0044] The control module controls the fourth power unit of the detection module to retract the rebound hammer, drives the detection module to position itself at the next detection point and completes the detection, until all points in the sequence have been traversed. After completing the detection of all points, the control module can automatically process the collected rebound value set (such as calculating the average value and standard deviation, and removing outliers), and can combine the automatically or manually measured carbonation depth value with the built-in standard strength test curve formula to automatically calculate and output the estimated concrete strength value of the detection area and a complete test report.

[0045] After the testing task is completed, the control module controls each module to return to the safe initial position and retracts the telescopic support device, so that the device is restored to a movable state, and the above process is repeated.

[0046] The above description of the disclosed embodiments enables those skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A concrete strength testing device for highway bridge construction, characterized in that, include: A mobile module that can move on the ground; A lifting module, which is fixed on the moving module; A horizontal position adjustment module is mounted on a lifting module, which drives the horizontal position adjustment module to slide vertically. The detection module is mounted on the horizontal position adjustment module. The horizontal position adjustment module drives the detection module to move linearly on the horizontal plane in a direction parallel to and / or perpendicular to the movement of the moving module.

2. The concrete strength testing device for highway bridge construction according to claim 1, characterized in that, The lifting module includes: First power unit; The first slide is connected to the first power device, which drives the first slide to slide vertically. The horizontal position adjustment module is fixed on the first slide.

3. The concrete strength testing device for highway bridge construction according to claim 1, characterized in that, The horizontal position adjustment module includes: Second power unit; The second slide is mounted on the second power unit and is driven by the second power unit to move linearly in a direction parallel to the movement of the moving module. The third power unit is fixedly installed on the second carriage; The third slide is mounted on the third power unit, which drives the third slide to move linearly in a direction perpendicular to the movement of the moving module.

4. The concrete strength testing device for highway bridge construction according to claim 3, characterized in that, The detection module includes: A fourth power unit is mounted on the third carriage; The rebound spring is mounted on the fourth power unit, which drives the rebound spring to move linearly in a direction parallel to the movement of the moving module.

5. The concrete strength testing device for highway bridge construction according to claim 1, characterized in that, The detection device also includes a telescopic support device, which is located at the bottom of the mobile module.

6. The concrete strength testing device for highway bridge construction according to claim 1, characterized in that, The detection device also includes a control module, which is communicatively connected to the moving module, the telescopic support device, the lifting module, the horizontal position adjustment module, and the detection module. The control module acquires the detection area parameters, determines the spatial coordinate sequence of the detection points based on the detection area parameters, and generates a displacement control signal for the detection module according to the spatial coordinate sequence of the detection points, so that the moving module, the lifting module and the horizontal position adjustment module drive the detection module to move to each detection point position one by one according to the preset path. When the detection module moves to the detection point, the control module obtains the real-time contact pressure between the detection module and the component surface, calculates the advancement speed of the detection module based on the real-time contact pressure, generates a first advancement control signal based on the advancement speed and sends it to the detection module so that the detection module can perform corresponding actions based on the first advancement control signal. Simultaneously, the propulsion termination judgment is made based on the real-time contact pressure, and a second propulsion control signal is generated based on the propulsion termination judgment result and sent to the detection module so that the detection module can perform the corresponding action based on the second propulsion control signal. When the detection module stops advancing, the control module reads the rebound value of the detection module.

7. A method for testing the strength of concrete used in highway bridge construction, characterized in that, The testing method employs the concrete strength testing device for highway bridge construction as described in claim 6, and the testing method includes: The control module acquires the detection area parameters of the concrete component to be tested, and determines the spatial coordinate sequence of detection points distributed according to a preset rule within the detection area based on the detection area parameters. The control module generates a displacement control signal for the detection module based on the spatial coordinate sequence of the detection points and sends it to the moving module, the lifting module and the horizontal position adjustment module to drive the detection module to move to the spatial coordinate position corresponding to each detection point one by one along a preset path. When the detection module moves to the current detection point position, the control module obtains the real-time contact pressure between the detection module and the surface of the concrete component; Based on the real-time contact pressure, the control module calculates the propulsion speed of the fourth power device in the detection module through a preset pressure control algorithm, and generates a first propulsion control signal according to the propulsion speed and sends it to the detection module to control the rebound hammer to perform a propulsion action on the surface of the concrete component. During the propulsion process, the control module determines whether to terminate the propulsion based on the real-time contact pressure; when the real-time contact pressure meets the preset triggering conditions, the control module generates a second propulsion control signal and sends it to the detection module to control the fourth power device to stop propulsion. After the fourth power unit stops advancing, the control module reads and records the rebound value generated by the rebound device at the current detection point.

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