A smart concrete strength testing device based on the rebound method

Abstract

This application relates to the field of concrete testing technology, and in particular to an intelligent concrete strength testing device based on the rebound hammer method. The device includes a guide vehicle, a robotic arm mounted on the guide vehicle, a force sensor at one end of the robotic arm, a mounting base connected to the detection end of the force sensor, a rebound hammer body slidably mounted on the mounting base, a drive assembly for driving the rebound hammer body to slide, and an industrial camera mounted on the mounting base. The mounting base also has a support structure for supporting the rebound hammer body. Through the cooperation of the guide vehicle, robotic arm, and drive assembly, this application achieves the goal of automatically testing concrete strength at measuring points in different locations while ensuring the accuracy of the test results, making the overall use simpler and more convenient.

Description

Technical Field

[0001] This application relates to the field of concrete testing technology, and in particular to an intelligent concrete strength testing device based on the rebound method. Background Technology

[0002] The rebound method is a test method for on-site determination of the compressive strength of concrete. It is mainly carried out with the help of a rebound hammer and has the advantages of wide applicability and no damage to concrete components.

[0003] The traditional testing method involves first drawing multiple test areas on the wall, with the following requirements: the distance between two adjacent test areas should not exceed 2 meters, the area of ​​a single test area should not exceed 0.04 square meters, and 16 test points are set in each test area. Then, a worker applies force to each test point with a handheld rebound hammer to complete the measurement, and records the rebound value of each test point. Finally, the 16 rebound values ​​are divided into 3 maximum values ​​and 3 minimum values, and the average value of the middle 10 rebound values ​​is calculated. The strength conversion value can then be found in the corresponding concrete strength conversion table for the test area based on this average value.

[0004] However, in actual testing, manual inspection has several drawbacks. First, it cannot guarantee that the rebound hammer is perpendicular to the wall, which can easily lead to deviations in the final measurement results and affect the accuracy of the test data. Second, since there are many different measurement locations, some higher walls require climbing ladders to complete the test, which is not only inconvenient to operate but also dangerous, and therefore needs improvement. Utility Model Content

[0005] To address the issues of inaccuracies and inconvenience in operation when using a handheld rebound hammer to test concrete strength, this application provides an intelligent concrete strength testing device based on the rebound method.

[0006] This application provides an intelligent concrete strength testing device based on the rebound method, which adopts the following technical solution: A concrete strength intelligent testing device based on the rebound method includes a omnidirectionally movable guide vehicle, a robotic arm mounted on the guide vehicle, a force sensor disposed at the end of the robotic arm away from the guide vehicle, a mounting base connected to the detection end of the force sensor, a rebound hammer body slidably disposed on the mounting base, a drive assembly for driving the rebound hammer body to slide, and an industrial camera disposed on the mounting base. The mounting base is also provided with a support structure for supporting the rebound hammer body.

[0007] By adopting the above technical solution, the rebound hammer body can be vertically aligned with the measuring points at different positions and heights through the cooperation of the guide vehicle, robotic arm and industrial camera. The rebound hammer body is then driven by the drive component and supported by the support structure to achieve the purpose of rebound testing of the measuring points. At the same time, the stability of the rebound hammer testing process is ensured, thereby ensuring the accuracy of the test results. The overall use is simple and convenient.

[0008] Preferably, a sliding seat is slidably disposed on the mounting base, the sliding seat has a mounting groove, the rebound spring body is embedded in the mounting groove, the sliding seat is provided with a locking structure for locking the rebound spring body, and the driving component is used to drive the sliding seat to slide.

[0009] By adopting the above technical solution, the rebound hammer body and the sliding seat can be detachably connected through the snap-fit ​​structure, which makes it convenient for workers to disassemble and maintain the rebound hammer.

[0010] Preferably, the snap-fit ​​structure includes a first clamping block and a second clamping block hinged to the sliding seat, a long screw rod passing through the sliding seat, and a locking nut threaded with the long screw rod. The first clamping block and the second clamping block cooperate to snap and limit the rebound spring body in the mounting groove. The long screw rod and the locking nut cooperate to snap and fix the end of the first clamping block away from the sliding seat and the end of the second clamping block away from the sliding seat.

[0011] By adopting the above technical solution, the rebound hammer body can be easily disassembled during use through the cooperation of the first clamping block, the second clamping block, the long screw and the locking nut. At the same time, the stability of the rebound hammer body after installation is ensured, thereby ensuring its normal use in the testing process.

[0012] Preferably, the drive assembly includes a drive electric cylinder mounted on the mounting base and a first position sensor mounted on the sliding base. A buffer structure is also provided between the sliding base and the mounting base to ensure the sliding stability of the sliding base.

[0013] By adopting the above technical solution, during use, the rebound hammer body is moved by driving the electric cylinder, and the position of the rebound hammer body is detected in real time by the first position sensor to ensure the effectiveness of the rebound hammer body. In addition, the buffer structure reduces the vibration during the movement of the rebound hammer body, further ensuring the stability of the rebound hammer body during use.

[0014] Preferably, the buffer structure includes two fixing blocks fixed on the mounting base, a guide rod disposed between the two fixing blocks, a connecting plate sliding on the guide rod, and a buffer spring disposed between the connecting plate and the fixing blocks. The two ends of the guide rod in the length direction are respectively connected to a fixing block, and the connecting plate is fixedly connected to the sliding base.

[0015] By adopting the above technical solution, during use, the sliding seat is guided by the cooperation of the guide rod and the connecting plate, and the vibration of the connecting plate during the movement is reduced by the elasticity of the buffer spring, thereby achieving the purpose of ensuring the sliding stability of the sliding seat.

[0016] Preferably, the support structure includes a fixed plate fixed to the end of the mounting base away from the force sensor, and a plurality of support rods mounted on the fixed plate. The fixed plate has a clearance groove. The end of the impact rod of the rebounder body passes through the clearance groove and extends away from the fixed plate. The axis of the support rod is parallel to the axis of the rebounder body, and the distance between the end of the support rod away from the fixed plate and the fixed plate is greater than the distance between the end of the impact rod of the rebounder body and the fixed plate.

[0017] By adopting the above technical solution, when the rebound hammer body is moved by the robotic arm, several support rods first contact the wall, thereby achieving support and positioning of the mounting base and the rebound hammer body. Then, during the movement of the rebound hammer body, the stability of the rebound hammer body can be ensured.

[0018] Preferably, a second position sensor is also provided on the fixing plate.

[0019] By adopting the above technical solution, during use, the position of the fixed plate is detected by setting a second position sensor, which, together with the robotic arm and industrial camera, further ensures the accuracy of the movement of the rebound spring body.

[0020] Preferably, the industrial camera is mounted on a sliding base, and the sliding base is also equipped with a rotary electric cylinder for adjusting the orientation of the industrial camera lens.

[0021] By adopting the above technical solution, when in use, the setting of the rotary electric cylinder enables the industrial camera to rotate towards the numerical display screen of the rebound hammer body while determining the position of the test area, so as to take pictures and store the test values.

[0022] In summary, this application includes at least one of the following beneficial technical effects: 1. By combining the guide vehicle, robotic arm and industrial camera, the rebound hammer body can be vertically aligned with the measuring points at different positions and heights. The drive component drives the rebound hammer body to move, and with the support of the support structure, the purpose of rebound testing on the measuring points can be achieved. At the same time, the stability of the rebound hammer testing process is ensured, thereby ensuring the accuracy of the test results. The overall use is simple and convenient. 2. The combination of the first clamping block, the second clamping block, the long screw and the locking nut enables convenient disassembly of the rebound hammer body, while also ensuring the stability of the rebound hammer body after installation; 3. By using the electric cylinder, the first position sensor, the buffer spring, the support rod, and the second position sensor in combination, the stability of the rebound hammer body during movement is improved, which helps to ensure the accuracy of the measurement results of the rebound hammer body. Attached Figure Description

[0023] Figure 1 This is an isometric schematic diagram of the main overall structure in Embodiment 1 of this application; Figure 2 This is an exploded view of the main mounting base structure in Embodiment 1 of this application; Figure 3 This is an isometric schematic diagram of the main snap-fit ​​structure in the open state in Embodiment 1 of this application; Figure 4 This is an isometric schematic diagram of the main drive component structure in Embodiment 1 of this application; Figure 5 This is an isometric schematic diagram of the main buffer structure in Embodiment 1 of this application; Figure 6 This is an isometric schematic diagram of the main supporting structure in Embodiment 1 of this application; Figure 7 This is a schematic diagram illustrating the structure after multiple mounting bases are combined, as shown in Embodiment 2 of this application. Figure 8 This is an isometric schematic diagram of a single mounting base structure, which is the main feature of Embodiment 2 of this application.

[0024] Reference numerals: 1. Guide vehicle; 2. Robotic arm; 3. Force sensor; 4. Mounting base; 41. Sliding base; 411. Groove; 42. Mounting groove; 43. Snap-fit ​​structure; 431. First clamping block; 432. Second clamping block; 433. Long screw; 434. Locking nut; 435. Insert; 44. Slider; 45. Guide rail; 46. Locking bolt; 5. Rebound spring body; 6. Drive assembly; 61. Drive cylinder; 62. First position sensor; 7. Industrial camera; 8. Support structure; 81. Fixing plate; 82. Support rod; 83. Clearance groove; 84. Second position sensor; 9. Buffer structure; 91. Fixing block; 92. Guide rod; 93. Connecting plate; 94. Buffer spring; 10. Rotary cylinder; 20. Vertical folding plate; 30. Control system. Detailed Implementation

[0025] The following is in conjunction with the appendix Figure 1 -Appendix Figure 8 This application will be described in further detail.

[0026] This application discloses an intelligent concrete strength testing device based on the rebound method.

[0027] Example 1: Reference Figure 1 and Figure 2 A concrete strength intelligent testing device based on the rebound method includes a guide vehicle 1, a robotic arm 2, a force sensor 3, a mounting base 4, a rebound hammer body 5, a drive assembly 6, and an industrial camera 7. In this embodiment, the guide vehicle 1 is preferably an AGV inspection vehicle. A control system 30 is also installed on the body of the guide vehicle 1. The control system 30 is used to control the coordinated use of the various components on the device. The robotic arm 2 is preferably a six-degree-of-freedom robotic arm. The base of the robotic arm 2 is bolted to the body of the guide vehicle 1. The force sensor 3 is preferably a six-degree-of-freedom force sensor. The force sensor 3 is installed at the end of the robotic arm 2 away from the guide vehicle 1. The mounting base 4 is bolted to the detection end of the force sensor 3. The rebound hammer body 5, the drive assembly 6, and the industrial camera 7 are all mounted on the mounting base 4. The rebound hammer body 5 is preferably a digital display rebound hammer.

[0028] Reference Figure 1 and Figure 2 In use, the guide vehicle 1 moves the entire device closer to the test area. Then, with the cooperation of the force sensor 3 and the robotic arm 2, the rebound hammer body 5 is moved to different test points in the test area. The drive component 6 then drives the rebound hammer body 5 to move to the wall. By continuing to move the rebound hammer body 5, the rebound value at the test point can be measured. Afterwards, with the cooperation of the robotic arm 2, the force sensor 3, and the industrial camera 7, the rebound value of test points at different positions can be continuously measured. The whole process is simple and convenient to use, and it can also support the purpose of measuring test points at different positions and heights.

[0029] Reference Figure 1 and Figure 2 A sliding seat 41 is slidably disposed on the mounting base 4. The sliding seat 41 slides along the length direction of the mounting base 4. A mounting groove 42 is provided on the sliding seat 41. The rebounder body 5 can be embedded in the mounting groove 42. A snap-fit ​​structure 43 is provided on the sliding seat 41. The snap-fit ​​structure 43 is used to snap and limit the rebounder body 5 in the mounting groove 42 to prevent the rebounder body 5 from shaking or falling out of the mounting groove 42, so as to ensure the installation stability of the rebounder body 5, thereby achieving relative fixation between the rebounder body 5 and the sliding seat 41.

[0030] Reference Figure 2 and Figure 3 The snap-fit ​​structure 43 includes a first clamping block 431, a second clamping block 432, a long screw 433, and a locking nut 434. One end of the first clamping block 431 and one end of the second clamping block 432 are both hinged to the sliding seat 41, and the first clamping block 431 and the second clamping block 432 are spaced apart along the length of the sliding seat 41. The other end of the first clamping block 431 and the other end of the second clamping block 432 are set as movable ends. An insert 435 is integrally formed on the movable end of the first clamping block 431 and the movable end of the second clamping block 432. A corresponding groove 411 is opened on the sliding seat 41 to cooperate with the insert 435. In use, the rotation of the first clamping block 431 and the second clamping block 432 can drive the insert 435 to be inserted into the corresponding groove 411, thereby achieving the initial positioning of the first clamping block 431 and the second clamping block 432.

[0031] Reference Figure 2 and Figure 3 The long screw 433 is slidably inserted on the sliding seat 41. The locking nut 434 is threadedly engaged with the long screw 433. The locking nut 434 and the long screw 433 are used to limit the first clamping block 431 and the second clamping block 432 so as to fix the insert 435 in the groove 411. Specifically, through holes are provided on the insert 435 of the first clamping block 431 and the insert 435 of the second clamping block 432. One end of the long screw 433 is inserted from one side of the sliding seat 41, passes through the through hole and exits from the other side of the sliding seat 41, and then is threadedly connected to the locking nut 434.

[0032] Reference Figure 2 and Figure 3In use, the first clamping block 431 and the second clamping block 432 are rotated open, at which point the insert 435 is disengaged from the groove 411. Then, the rebounder body 5 is placed into the mounting groove 42. The first clamping block 431 and the second clamping block 432 are rotated so that the insert 435 is correspondingly embedded in the groove 411. Finally, the long screw 433 is inserted, and the locking nut 434 is screwed to one end of the long screw 433. This completes the installation of the rebounder body 5. In order to ensure that there is no relative sliding between the rebounder body 5 and the sliding seat 41 during subsequent force measurement after the rebounder body 5 is installed, in this embodiment, the first clamping block 431 and the second clamping block 432 are respectively set at the front and rear ends of the rebounder body 5. The first clamping block 431 is used to prevent the rebounder body 5 from moving backward relative to the sliding seat 41, and the second clamping block 432 is used to prevent the rebounder body 5 from moving forward relative to the sliding seat 41.

[0033] Reference Figure 2 and Figure 4 The drive assembly 6 is used to drive the sliding seat 41 to slide. The drive assembly 6 includes a drive cylinder 61 and a first position sensor 62. The cylinder body of the drive cylinder 61 is fixedly mounted on the mounting base 4. The piston rod of the drive cylinder 61 is fixedly connected to the sliding seat 41. The first position sensor 62 is installed at the end of the sliding seat 41 away from the force sensor 3, and the first position sensor 62 is used to detect the relative position of the sliding seat 41 and the wall. In use, the first position sensor 62 detects the distance between the sliding seat 41 and the wall in real time, thereby determining the moving distance of the rebound hammer body 5's striking rod. When the rebound hammer body 5's striking rod is compressed to the measuring state, the first position sensor 62 sends a signal to the control system 30, and the control system 30 controls the piston rod of the drive cylinder 61 to retract, thereby completing the process of measuring the rebound value of a measuring point.

[0034] Reference Figure 4 and Figure 5 During the sliding process of the rebound hammer body 5 with the sliding seat 41, in order to ensure that the rebound hammer body 5 does not vibrate during the sliding process of the sliding seat 41, which would affect the rebound hammer body 5, a buffer structure 9 is also provided between the sliding seat 41 and the mounting seat 4. The buffer structure 9 is used to ensure that the sliding seat 41 moves stably on the mounting seat 4. The buffer structure 9 includes a fixing block 91, a guide rod 92, a connecting plate 93 and a buffer spring 94. There are two fixing blocks 91, and the two fixing blocks 91 are fixed to the mounting seat 4 at intervals. The guide rod 92 is located between the two fixing blocks 91, and both ends of the guide rod 92 are bolted to one fixing block 91. The axis of the guide rod 92 is parallel to the length direction of the mounting seat 4. The connecting plate 93 is slidably connected to the guide rod 92, and the top end of the connecting plate 93 is fixed to the sliding seat 41 by bolts.

[0035] Reference Figure 4 and Figure 5 Two buffer springs 94 are provided, both of which are sleeved on the guide rod 92. The two buffer springs 94 are located on both sides of the connecting plate 93, with one end of the buffer spring 94 abutting against the fixed block 91 and the other end of the buffer spring 94 abutting against the connecting plate 93. In the initial state, the rebound hammer body 5 is in an unloaded state, and the buffer springs 94 are in a compressed state. When the rebound hammer body 5 slides with the sliding seat 41, the elastic force of the buffer spring 94 on one side of the sliding direction of the sliding seat 41 reduces the vibration that is prone to occur when the sliding seat 41 slides quickly, thereby ensuring the stability of the rebound hammer body 5 during the detection process. In this embodiment, in order to further ensure the stability of the rebound hammer body 5 during the movement process, two sets of buffer structures 9 are provided, and the two sets of buffer structures 9 are symmetrically arranged on both sides of the drive electric cylinder 61.

[0036] Reference Figure 1 and Figure 6 To further ensure the stability of the rebound hammer body 5 during the detection process, a support structure 8 is also provided on the mounting base 4. The support structure 8 provides support force to the rebound hammer body 5 by supporting the mounting base 4. The support structure 8 includes a fixing plate 81 and a support rod 82. The fixing plate 81 is fixed to the end of the mounting base 4 away from the force sensor 3 by bolts. A clearance groove 83 is also provided on the fixing plate 81. After the rebound hammer body 5 is assembled with the sliding base 41, the end of the rebound hammer body 5 passes through the clearance groove 83 and extends in a direction away from the fixing plate 81.

[0037] Reference Figure 1 and Figure 6 Several support rods 82 are provided, and the support rods 82 are distributed at intervals on the fixed plate 81. In this embodiment, four support rods 82 are preferably provided, and the four support rods 82 are distributed in a rectangular shape. One end of the support rod 82 is locked to the fixed plate 81 by two nuts, and the other end of the support rod 82 extends away from the fixed plate 81. In this application, the axis of the support rod 82 should be parallel to the axis of the rebounder body 5.

[0038] Reference Figure 1 and Figure 6 Furthermore, the distance between the end of the support rod 82 away from the fixed plate 81 and the fixed plate 81 should be greater than the distance between the end of the rebound hammer body 5 and the fixed plate 81. That is, when the robotic arm 2 moves the mounting base 4 closer to the test area of ​​the wall, the end of the support rod 82 first contacts the wall, and then the pressure between the support rod 82 and the wall is fed back to the force sensor 3, and then the force sensor 3 transmits the signal to the control system 30, thereby controlling the robotic arm 2 to stop moving through the control system 30, so as to achieve the positioning of the rebound hammer body 5. In this state, there is a gap between the end of the rebound hammer body 5 and the test area of ​​the wall.

[0039] Reference Figure 6 Meanwhile, to further ensure the accuracy of the distance between the rebound hammer body 5 and the wall, a second position sensor 84 is also installed on the fixing plate 81. When in use, when the force sensor 3 detects pressure between the end of the support rod 82 and the wall, it proves that the end of the support rod 82 is in contact with the wall. At this time, the second position sensor 84 can further detect the position of the mounting base 4. Combined with the detection result of the first position sensor 62, the accuracy of the position of the rebound hammer body 5 can be ensured. At the same time, it is also conducive to ensuring the precise control of the subsequent movement distance of the rebound hammer body 5.

[0040] Reference Figure 1 and Figure 2 A vertical folding plate 20 is fixed to the sliding seat 41 by bolts. A rotary electric cylinder 10 is installed at the top of the vertical folding plate 20. An industrial camera 7 is installed on the output end of the rotary electric cylinder 10. In the initial state, the camera of the industrial camera 7 faces the wall to identify the position of the test area on the wall, so as to assist the robotic arm 2 in moving the rebound hammer body 5 to the test point in the test area. After the rebound hammer body 5 is aligned with the test point, the rotary electric cylinder 10 controls the industrial camera 7 to rotate so that the camera faces the display screen on the rebound hammer body 5. In the subsequent test process of the rebound hammer body 5, the rebound value measured by the rebound hammer body 5 is photographed and recorded so that the workers can judge the strength of the wall concrete based on this measurement record.

[0041] The implementation principle of this application embodiment is as follows: In use, the guide vehicle 1 and the industrial camera 7 work together to move the entire device to a position close to the test area on the wall. Then, through the cooperation of the robotic arm 2, the first position sensor 62, and the second position sensor 84, the rebound hammer body 5 is vertically aligned with the test area on the wall. After the end of the support rod 82 abuts against the wall, the movement of the robotic arm 2 is stopped, thereby positioning the rebound hammer body 5. Then, the control system 30 controls the output end of the rotary electric cylinder 10 to rotate, so as to drive the industrial camera 7 toward the rebound hammer body 5. The piston rod of the drive cylinder 61 extends to move the rebound hammer body 5 closer to the wall until it touches the wall of the test area. Then, the piston rod of the drive cylinder 61 continues to move until the first position sensor 62 detects that the rebound hammer body 5 has moved to the impact rod and completed the detection. Then, the control system 30 controls the piston rod of the drive cylinder 61 to retract, thereby achieving the purpose of measuring the rebound value of a test point in the test area. Afterwards, the robotic arm 2 and the guide vehicle 1 work together to measure the test points at various positions in the test area in sequence. The whole process is automated and simple and convenient to use.

[0042] Example 2: Reference Figure 7 and Figure 8The difference between this embodiment and embodiment 1 is that, in this embodiment, a slider 44 is fixed to one side of the mounting base 4 by bolts, and a guide rail 45 is fixed to the other side of the mounting base 4 by bolts. The slider 44 and the guide rail 45 cooperate with each other, and the slider 44 can slide into the guide rail 45 along the height direction of the mounting base 4. A locking bolt 46 is also provided on the mounting base 4. Positioning holes are correspondingly opened on the slider 44 and the guide rail 45. One end of the locking bolt 46 passes through the positioning holes of the slider 44 and the guide rail 45 and is threaded onto the mounting base 4, thereby achieving the purpose of locking the slider 44 on the guide rail 45.

[0043] Reference Figure 7 and Figure 8 In use, several mounting bases 4, each equipped with a rebound hammer body 5, can be placed side by side along their width. Adjacent mounting bases 4 can be fixed by the cooperation of sliders 44, guide rails 45, and locking bolts 46. Each mounting base 4 is equipped with an industrial camera 7, a drive assembly 6, and a buffer structure 9, thereby achieving the purpose of simultaneously measuring the rebound value of multiple measuring points, making the overall measurement more efficient. In other embodiments, multiple sets of rebound hammer bodies 5 can also be moved by a drive assembly 6. Specifically, a linkage plate is bolted between the sliding seats 41 on two adjacent sets of mounting bases 4, and multiple sliding seats 41 are combined together by the linkage plate, so that when a drive cylinder 61 drives one sliding seat 41 to slide, multiple sliding seats 41 slide synchronously.

[0044] Reference Figure 7 and Figure 8 Furthermore, in this embodiment, the size of the fixing plate 81 can be changed according to the number of mounting seats 4 connected. For example, with three mounting seats 4, the length of the mounting seat 4 should be greater than the sum of the widths of the three mounting seats 4. Thus, after the three mounting seats 4 are combined, the mounting seats 4 are supported by only one fixing plate 81 and four support rods 82 provided thereon.

[0045] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A smart concrete strength testing device based on the rebound method, characterized in that: It includes a omnidirectionally movable guide vehicle (1), a robotic arm (2) mounted on the guide vehicle (1), a force sensor (3) located at the end of the robotic arm (2) away from the guide vehicle (1), a mounting base (4) connected to the detection end of the force sensor (3), a rebounder body (5) slidably mounted on the mounting base (4), a drive assembly (6) for driving the rebounder body (5) to slide, and an industrial camera (7) mounted on the mounting base (4). The mounting base (4) is also provided with a support structure (8) for supporting the rebounder body (5).

2. The intelligent concrete strength testing device based on the rebound method according to claim 1, characterized in that: A sliding seat (41) is slidably disposed on the mounting base (4), and a mounting groove (42) is provided on the sliding seat (41). The rebounder body (5) is embedded in the mounting groove (42). A snap-fit ​​structure (43) for snapping the rebounder body (5) is provided on the sliding seat (41). The driving component (6) is used to drive the sliding seat (41) to slide.

3. The intelligent concrete strength testing device based on the rebound method according to claim 2, characterized in that: The snap-fit ​​structure (43) includes a first clamping block (431) and a second clamping block (432) hinged to the sliding seat (41), a long screw (433) passing through the sliding seat (41), and a locking nut (434) threaded with the long screw (433). The first clamping block (431) and the second clamping block (432) cooperate to snap and limit the rebound spring body (5) in the mounting groove (42). The long screw (433) and the locking nut (434) cooperate to snap and fix the end of the first clamping block (431) away from the sliding seat (41) and the end of the second clamping block (432) away from the sliding seat (41).

4. The intelligent concrete strength testing device based on the rebound method according to claim 2, characterized in that: The drive assembly (6) includes a drive electric cylinder (61) mounted on the mounting base (4) and a first position sensor (62) mounted on the sliding base (41). A buffer structure (9) is also provided between the sliding base (41) and the mounting base (4) to ensure the sliding stability of the sliding base (41).

5. The intelligent concrete strength testing device based on the rebound method according to claim 4, characterized in that: The buffer structure (9) includes two fixing blocks (91) fixed on the mounting base (4), a guide rod (92) disposed between the two fixing blocks (91), a connecting plate (93) sliding on the guide rod (92), and a buffer spring (94) disposed between the connecting plate (93) and the fixing blocks (91). The two ends of the guide rod (92) in the length direction are respectively connected to a fixing block (91), and the connecting plate (93) is fixedly connected to the sliding base (41).

6. The intelligent concrete strength testing device based on the rebound method according to claim 1, characterized in that: The support structure (8) includes a fixed plate (81) fixed to the end of the mounting base (4) away from the force sensor (3) and a plurality of support rods (82) mounted on the fixed plate (81). The fixed plate (81) has a clearance groove (83). The end of the impact rod of the rebounder body (5) passes through the clearance groove (83) and extends away from the fixed plate (81). The axis of the support rod (82) is parallel to the axis of the rebounder body (5), and the distance between the end of the support rod (82) away from the fixed plate (81) and the fixed plate (81) is greater than the distance between the end of the impact rod of the rebounder body (5) and the fixed plate (81).

7. The intelligent concrete strength testing device based on the rebound method according to claim 6, characterized in that: A second position sensor (84) is also provided on the fixing plate (81).

8. The intelligent concrete strength testing device based on the rebound method according to claim 2, characterized in that: The industrial camera (7) is mounted on a sliding base (41), and the sliding base (41) is also equipped with a rotary electric cylinder (10) for adjusting the orientation of the camera of the industrial camera (7).

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