A fully automatic rebound tester

Abstract

The present invention relates to the field of concrete strength testing equipment, and in particular to a fully automatic rebound test hammer, comprising a rebound working box, a suction cup structure, a dial functional area, and a rebound test hammer, wherein the dial functional area is arranged on the upper top surface of the rebound working box, a functional slot is arranged in the rebound working box, the rebound test hammer is arranged in the functional slot, the dial functional area is electrically connected to the rebound test hammer for key operation and displaying test data, an engraving frame and an intelligent recognition system are also arranged in the functional slot, a linkage mechanism is provided on the rebound working box, the suction cup structure and the engraving frame are linked by the linkage mechanism, and the technical problem that the rebound test results are somewhat discrete due to the inconsistent standardization of the rebound test hammer operation caused by manual hand-holding during the concrete strength test of the existing rebound test hammer is solved, and at the same time, the measurement accuracy is improved by improving intelligence and mechanization.

Description

Technical Field

[0001] The present invention relates to the field of concrete strength testing equipment, in particular to a full-automatic rebound test hammer. Background Art

[0002] The basic principle of the rebound hammer is to use a spring to drive a heavy hammer. The heavy hammer hits the impact rod in vertical contact with the concrete surface with constant kinetic energy, causing local concrete to deform and absorb part of the energy. The other part of the energy is converted into the rebound kinetic energy of the heavy hammer. When the rebound kinetic energy is completely converted into potential energy, the heavy hammer rebounds to the maximum distance. The instrument displays the maximum rebound distance of the heavy hammer in the name of the rebound value (the ratio of the maximum rebound distance to the initial length of the spring).

[0003] Since its invention, the rebound method for testing concrete compressive strength has been widely used worldwide due to its low cost and high efficiency. However, the equipment has not undergone fundamental innovation since its invention. In the 21st century, using a rebound hammer still requires rebounding at each test area, which places a considerable strain on testers. Furthermore, different testers vary in their use of the rebound hammer, resulting in a certain degree of dispersion in rebound test results, which affects the reliability of the results. This is particularly evident in the fact that conventional rebound hammers require the striking rod to remain perpendicular to the concrete surface during manual testing to obtain accurate measurements. However, due to various factors such as the varying heights and inclinations of the measurement locations, it is often difficult for testers to maintain perpendicularity at each measurement point, resulting in slight deviations from the actual results.

[0004] Chinese patent application number 202311072777.4 discloses a rebound tester, wherein the rebound tester housing includes a lower housing section and a telescopic housing section disposed at the upper end of the lower housing section, a firing rod is guided and movable and assembled at the lower end of the lower housing section, and the telescopic housing section includes at least two telescopic sleeves that telescope and cooperate in a vertical direction, wherein the uppermost telescopic sleeve is a fixed sleeve fixed to the upper end of the lower housing section, a guide flange is fixed to the inner hole of the lowermost telescopic sleeve, an end cap is provided at the top of the fixed sleeve, a release screw is provided at the lower end of the end cap, and a locking button is provided on the fixed sleeve for limiting the engagement with the lowermost telescopic sleeve. A firing compression spring is provided at the top of the lower housing section and is located on the periphery of the telescopic housing section, the lower end of the firing compression spring being configured to contact and push the upper end of the firing hammer when the firing hammer moves upward. The above invention solves the technical problem of the prior art that firing springs are easily ineffective due to the use of tension springs. However, in actual use, if a handheld rebound hammer is still used for measurement, it is easy to cause the rebound rod and the concrete surface to not be perpendicular to each other, thus leading to technical problems such as inaccurate measurement results. Summary of the Invention

[0005] Therefore, in response to the above problems, the present invention proposes a fully automatic rebound test hammer, which solves the technical problem that the rebound test results are somewhat discrete due to the inconsistent operation of the rebound test hammer caused by manual hand-holding during the concrete strength test of the existing rebound test hammer, and at the same time improves the intelligence and mechanization to improve the measurement accuracy.

[0006] To achieve the above-mentioned object, the present invention adopts the following technical solutions: a fully automatic rebound tester, comprising a rebound working box, a suction cup structure, a dial functional area, and a rebound tester, wherein the rebound working box is a cubic box having an opening, the suction cup structure is arranged on the four peripheral sides of the rebound working box, the dial functional area is arranged on the upper top surface of the rebound working box, a functional slot is arranged in the rebound working box, the rebound tester is arranged in the functional slot, the dial functional area is electrically connected to the rebound tester for key operation and displaying test data, an engraving frame and an intelligent recognition system are further arranged in the functional slot, a linkage mechanism is provided on the rebound working box, and the suction cup structure and the engraving frame are linked via the linkage mechanism;

[0007] The suction cup structure includes two groups of suction cup rods arranged opposite to each other, namely a first suction cup rod and a second suction cup rod, and a third suction cup rod and a fourth suction cup rod arranged opposite to each other, wherein the third suction cup rod and the fourth suction cup rod are symmetrical in structure, and each of the first suction cup rod, the second suction cup rod, the third suction cup rod and the fourth suction cup rod is respectively provided with a plurality of suction cups, the first suction cup rod is provided with a first extension portion, and the second suction cup rod is provided with a second extension portion;

[0008] The marking frame moves up and down along the length direction of the rebound working box, and its movement process is linked to the suction cup on the suction cup rod.

[0009] Furthermore, gripping handles are provided on the upper surface of the rebound working box on both sides of the dial functional area.

[0010] Furthermore, the engraving frame is a grid-type frame, which includes sixteen square grids arranged in a matrix. An inkjet mechanism is integrated in the engraving frame, and the inkjet mechanism triggers the inkjet operation after the engraving frame contacts the concrete surface.

[0011] Furthermore, the first extension portion and the second extension portion are both parallel to the lower bottom surface of the rebound working box, so as to provide stability when the rebound working box contacts the concrete surface.

[0012] Furthermore, four first movable guide rails are respectively provided on the four outer peripheral sides of the rebound working box, and four second movable guide rails are respectively provided on the four inner peripheral sides of the rebound working box. The first suction cup rod, the second suction cup rod, the third suction cup rod and the fourth suction cup rod are respectively clamped on the first movable guide rails on the four outer peripheral sides, and the engraving frame is clamped on the second movable guide rails. Connecting grooves are provided on the four side walls of the rebound working box, and each of the connecting grooves is respectively connected to the first movable guide rail and the second movable guide rail on each side wall, and the linkage mechanism is arranged in the connecting groove.

[0013] Furthermore, the linkage mechanism includes a micro-drive motor, an active drive gear, a first drive rack, and a second drive rack. The active drive gear is fixedly arranged on the output shaft of the micro-drive motor and is driven to rotate by the micro-drive motor. The first drive rack and the second drive rack are respectively engaged with the active drive gear. An air guide channel is provided in the suction cup rod, and an air extraction rod is provided in the air guide channel. The air guide channel is connected to the suction cup, and the air pressure of the suction cup is controlled by the up and down movement of the air extraction rod.

[0014] Furthermore, the first drive rack is fixedly connected to the vacuum rod, and the second drive rack is fixedly connected to the outer frame edge of the engraving frame. The first drive rack and the second drive rack are arranged in an opposite state. When the active drive gear starts to rotate, the first drive rack and the second drive rack move in opposite directions, thereby driving the vacuum rod and the engraving frame to move.

[0015] Furthermore, the intelligent recognition system includes an intelligent camera and a flash, which are used to take pictures of the detection surface of the concrete surface and input them into the system for analysis.

[0016] Furthermore, a movable guide rail is provided in the functional slot, and the movable guide rail includes a movable transverse rail and a movable longitudinal rail that are staggered with each other. The rebound hammer is provided on the movable guide rail and moves on the movable guide rail.

[0017] Furthermore, the first extension portion and the second extension portion have the same contact area with the concrete surface.

[0018] By adopting the above technical solution, the beneficial effects of the present invention are:

[0019] 1. Compared with the existing traditional rebound hammer, the present invention eliminates human errors in the detection process through intelligent and mechanized improvements. The fully automatic rebound hammer proposed by the present invention can optimize the selection of measuring points in the rebound measurement area by using an intelligent algorithm. At the same time, the automated working method can meet the specification requirements to the greatest extent. In addition, the technician only needs to perform a one-button start operation on the dial function area. During the detection process of a single measurement area, the inspector can easily wait for the equipment to complete the detection automatically. Specifically, a suction cup structure is provided, wherein the suction cup structure includes two groups of suction cup rods arranged opposite to each other, and each suction cup rod is provided with a suction cup. The purpose is that when the rebound working box completes contact with the concrete surface, the suction cup structure can be adsorbed on the concrete surface through negative pressure to make the rebound working box and the concrete surface fit more closely. At the same time, in the conventional detection process, it is necessary to manually draw a grid on the concrete surface in advance, and then select the grid as the detection point, while in the present invention, An engraving frame is directly arranged in the rebound working box, and the engraving frame can form a 4*4 grid as a detection area on the concrete surface at one time, and the work of the engraving frame and the work of the suction cup rod are coordinated with each other, that is, it can ensure that the rebound working box synchronously draws the grid of the detection area on the concrete surface during the process of adsorption of the concrete surface by the suction cup rod. The degree of automation is higher and the work efficiency is improved, and the measurement error caused by manual operation can be avoided. At the same time, by adopting the technical solution proposed by the present invention, the technical problem that the detection head of the traditional rebound tester is often not perpendicular to the concrete surface when performing tests manually is avoided. In the present invention, a first extension part and a second extension part are respectively arranged on the first suction cup rod and the second suction cup rod. The function of the two is that when the concrete surface is in a vertical state, the first extension part and the second extension part can increase the contact area between the rebound working box and the concrete surface, thereby ensuring that stable work can be achieved even when detecting the vertical concrete surface.

[0020] 2. In the present invention, a gripping handle is provided on the rebound working box so as to adapt to concrete surfaces in different states. For example, in a vertical state, due to the gravity of the rebound working box itself, it cannot be fixed on the concrete surface by the suction cup structure. In this case, manual external assistance is required, that is, the worker holds the gripping handle to fix the rebound working box. At this time, the suction cup structure plays an auxiliary supporting role to prevent the vibration generated during work from affecting the measurement results.

[0021] 3. The present invention is provided with an engraving frame, and its inkjet principle is similar to that of a fountain pen or a ballpoint pen. When it contacts the concrete surface, the contact point contacts the concrete surface and retracts inward, and the ink flows outward onto the concrete surface. When it leaves the concrete surface, the contact point is not subjected to force and resets to block the ink outlet, and the ink cannot flow out. The detection area is directly drawn on the concrete surface through the engraving frame, which simplifies the manual drawing process and makes the drawn detection area more standardized.

[0022] 4. In the present invention, a first movable guide rail and a second movable guide rail are respectively provided on the rebound working box for fixing the suction cup rod and the engraving frame. At the same time, the first movable guide rail and the second movable guide rail are connected through a connecting groove, and a linkage mechanism is provided in the connecting groove. The present invention uses the linkage mechanism to make the suction cup rod and the engraving frame, which were originally independent of each other, work in conjunction with each other, on the one hand, improving work efficiency, and on the other hand streamlining the power source and saving energy consumption. Specifically, the linkage mechanism includes an active driving gear driven by a micro driving motor, a first driving gear meshing with the active driving gear The first drive rack and the second drive rack are arranged in opposite directions, that is, the two move in opposite directions through the rotation of the active drive gear, and the first drive rack is fixedly connected to the vacuum rod, and the second drive rack is fixedly connected to the edge of the outer frame of the engraving frame, ensuring that when the vacuum rod is lifted up to maintain a negative pressure state in the suction cup and perform adsorption on the concrete surface, the engraving frame moves downward to rest against the concrete surface to draw the detection area, and the two work synchronously. When this process is completed, the rebound hammer detection work can be carried out immediately, and this process can ensure that the rebound hammer works stably and the detection area is accurate in the later stage.

[0023] 5. The functional slot of the present invention is provided with horizontal and vertical staggered movable guide rails, which ensure that the rebound tester can work along the movable guide rails and complete the detection operation on 16 independent detection areas at one time. During this process, the rebound work box remains stationary, ensuring the detection accuracy.

[0024] 6. At the same time, during the negative pressure adsorption process of the present invention, since it is difficult to make the concrete surface completely smooth and flat, the suction cup can always maintain a constant negative pressure state during the process of the vacuum rod being lifted and the imprinting frame sinking. The principle is that the vacuum rod is continuously lifted during this process, and it is also because the concrete surface is not completely smooth and flat that it ensures that the vacuum rod will not stop lifting due to the vacuum in the suction cup, thereby causing the imprinting frame to be unable to continue sinking. The two work complement each other and are interconnected. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Other features, objects and advantages of the present invention will become more apparent upon reading the detailed description of non-limiting embodiments with reference to the following drawings:

[0026] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0027] Figure 2 It is a schematic diagram of the top view of the structure of the present invention;

[0028] Figure 3 This is a schematic diagram of the structure of the present invention when viewed from above;

[0029] Figure 4 Schematic diagram of the internal structure of the present invention (horizontal cross section);

[0030] Figure 5 for Figure 4 Enlarged view of point A in the middle;

[0031] Figure 6 Schematic diagram of the linkage mechanism structure in the present invention;

[0032] Figure 7 for Figure 6 Enlarged view of point B in the middle;

[0033] Figure 8 Schematic diagram of the internal structure of the present invention (vertical cross section). DETAILED DESCRIPTION

[0034] In order to make the technical means, creative features, objectives and effects achieved by the present invention easier to understand, the present invention is further described below in conjunction with specific implementation methods.

[0035] See also Figures 1-8 The present invention provides a fully automatic rebound tester, comprising a rebound working box 1, a suction cup structure, a dial functional area 2, and a rebound tester 4. The rebound working box 1 is a cubic box body with an opening. The suction cup structure is arranged on the four peripheral sides of the rebound working box 1. The dial functional area 2 is arranged on the upper top surface of the rebound working box 1. A functional slot is provided in the rebound working box 1. The rebound tester 4 is arranged in the functional slot. The dial functional area 2 is electrically connected to the rebound tester 4 for key operation and displaying detection data. A marking frame 6 and an intelligent recognition system 9 are also provided in the functional slot. A linkage mechanism is provided on the rebound working box 1, and the suction cup structure and the marking frame 6 are linked through the linkage mechanism.

[0036] The dial function area 2 and the rebound hammer 4 are well-known components. The rebound hammer 4 is lifted up and down in the vertical direction by the electronic telescopic rod 41 . The dial function area 2 is used for equipment operation and information display.

[0037] The suction cup structure includes two groups of suction cup rods arranged opposite to each other, namely a first suction cup rod 11 and a second suction cup rod 12, and a third suction cup rod 13 and a fourth suction cup rod 14. The third suction cup rod 13 and the fourth suction cup rod 14 are symmetrical in structure. A plurality of suction cups 5 are respectively provided on the first suction cup rod 11, the second suction cup rod 12, the third suction cup rod 13 and the fourth suction cup rod 14. A first extension portion 111 is provided on the first suction cup rod 11, and a second extension portion 121 is provided on the second suction cup rod 12.

[0038] The marking frame 6 moves up and down along the length direction of the rebound working box 1, and its movement process is linked to the suction cup 5 on the suction cup rod.

[0039] Gripping handles 3 are provided on the upper top surface of the rebound working box 1 on both sides of the dial functional area 2. The engraving frame 6 is a grid-type frame, which includes sixteen square grids arranged in a matrix. An inkjet mechanism is integrated in the engraving frame 6. The inkjet mechanism triggers the inkjet operation after the engraving frame contacts the concrete surface. The inkjet mechanism is a well-known structure. After contacting the concrete surface, the contact retracts and the inkjet channel opens.

[0040] The first extension portion 111 and the second extension portion 121 are both parallel to the lower bottom surface of the rebound working box 1, and are used to provide stability when the rebound working box 1 contacts the concrete surface. Four first movable guide rails 7 are respectively provided on the four outer peripheral sides of the rebound working box 1, and four second movable guide rails 61 are respectively provided on the four inner peripheral sides of the rebound working box 1. The first suction cup rod 11, the second suction cup rod 12, the third suction cup rod 13 and the fourth suction cup rod 14 are respectively clamped on the first movable guide rails 7 on the four outer peripheral sides, and the engraving frame 6 is clamped on the second movable guide rails 61. Connecting grooves 81 are provided on the four side walls of the rebound working box 1, and each connecting groove 81 is respectively connected to the first movable guide rail 7 and the second movable guide rail 61 on each side wall. The linkage mechanism is arranged in the connecting groove 81, and the linkage mechanism includes a micro drive motor, an active drive gear 8, a first drive gear Rack, second drive rack, the active drive gear 8 is fixedly provided on the output shaft of the micro-drive motor and is driven to rotate by the micro-drive motor, the first drive rack and the second drive rack are respectively engaged with the active drive gear, an air guide channel is provided in the suction cup rod, and an air extraction rod 71 is provided in the air guide channel 51, the air guide channel 51 is connected to the suction cup 5, and the air pressure of the suction cup 5 is controlled by the up and down movement of the air extraction rod 71, the first drive rack 72 is fixedly connected to the air extraction rod 71, and the second drive rack 63 is fixedly connected to the outer frame edge of the engraving frame 6, the first drive rack 72 and the second drive rack 63 are arranged in an opposing state, when the active drive gear 8 starts to rotate, the first drive rack 72 and the second drive rack 63 move in opposite directions, thereby driving the air extraction rod 71 and the engraving frame 6 to move.

[0041] The intelligent recognition system 9 includes an intelligent camera and a flash, which are used to take photos of the test surface of the concrete surface and input them into the system for analysis. A movable guide rail 62 is provided in the functional slot, and the movable guide rail 62 includes mutually staggered movable horizontal rails and movable vertical rails. The rebound test hammer 4 is set on the movable guide rail 62 via an electronic telescopic rod 41 and moves on the movable guide rail 62. The first extension portion 111 and the second extension portion 121 have the same contact area with the concrete surface.

[0042] The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the present invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the present invention. Therefore, from all perspectives, the embodiments should be regarded as illustrative and non-restrictive. The scope of the present invention is defined by the appended claims, not the foregoing description, and it is intended that all variations that come within the meaning and range of equivalents of the claims be included within the present invention. Any reference signs in the claims should not be construed as limiting the claim to which they relate.

[0043] In addition, it should be understood that although this specification is described in terms of implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

Claims

1. A fully automatic rebound test hammer, characterized by: The device comprises a rebound working box, a suction cup structure, a dial functional area, and a rebound hammer. The rebound working box is a cubic box with an opening. The suction cup structure is arranged on the four peripheral sides of the rebound working box. The dial functional area is arranged on the upper top surface of the rebound working box. A functional slot is arranged in the rebound working box. The rebound hammer is arranged in the functional slot. The dial functional area is electrically connected to the rebound hammer for key operation and displaying test data. An engraving frame and an intelligent recognition system are also arranged in the functional slot. A linkage mechanism is provided on the rebound working box. The suction cup structure and the engraving frame are linked through the linkage mechanism. The suction cup structure includes two groups of suction cup rods arranged opposite to each other, namely a first suction cup rod and a second suction cup rod arranged opposite to each other, and a third suction cup rod and a fourth suction cup rod arranged opposite to each other, the third suction cup rod and the fourth suction cup rod structures are symmetrical to each other, a plurality of suction cups are respectively provided on the first suction cup rod, the second suction cup rod is provided on the third suction cup rod and the fourth suction cup rod, an air guide channel is provided in the suction cup rod, an air pumping rod is provided in the air guide channel, the air guide channel is connected to the suction cup, and the air pressure of the suction cup is controlled by the up and down movement of the air pumping rod; The linkage mechanism includes a micro drive motor, an active drive gear, a first drive rack, and a second drive rack. The first drive rack is fixedly connected to the air extraction rod, and the second drive rack is fixedly connected to the outer frame edge of the engraving frame. The first drive rack and the second drive rack are arranged in a facing state. When the active drive gear starts to rotate, the first drive rack and the second drive rack move in opposite directions, thereby driving the air extraction rod and the engraving frame to move along the length direction of the rebound working box.

2. The fully automatic rebound hammer according to claim 1, characterized in that: Gripping handles are provided on the upper surface of the rebound working box and on both sides of the dial functional area.

3. The fully automatic rebound hammer according to claim 2, characterized in that: The engraving frame is a grid-type frame, which includes sixteen square grids arranged in a matrix. An inkjet mechanism is integrated in the engraving frame, and the inkjet mechanism triggers inkjet operation after the engraving frame contacts the concrete surface.

4. The fully automatic rebound hammer according to claim 3, characterized in that: The first extension portion and the second extension portion are both parallel to the lower bottom surface of the rebound working box, and are used to provide stability when the rebound working box contacts a concrete surface.

5. The fully automatic rebound hammer according to claim 4, characterized in that: Four first movable guide rails are respectively provided on the four outer peripheral sides of the rebound working box, and four second movable guide rails are respectively provided on the four inner peripheral sides of the rebound working box. The first suction cup rod, the second suction cup rod, the third suction cup rod and the fourth suction cup rod are respectively clamped on the first movable guide rails on the four outer peripheral sides, and the engraving frame is clamped on the second movable guide rails. Connecting grooves are provided on the four side walls of the rebound working box, and each connecting groove is respectively connected to the first movable guide rail and the second movable guide rail on each side wall, and the linkage mechanism is arranged in the connecting groove.

6. The fully automatic rebound hammer according to claim 5, characterized in that: The active driving gear is fixedly arranged on the output shaft of the micro driving motor and is driven to rotate by the micro driving motor. The first driving rack and the second driving rack are respectively engaged with the active driving gear.

7. The fully automatic rebound hammer according to claim 6, characterized in that: The intelligent recognition system includes an intelligent camera and a flash light, which are used to take pictures of the detection surface of the concrete surface and input the pictures into the system for analysis.

8. The fully automatic rebound hammer according to claim 7, characterized in that: A movable guide rail is provided in the functional slot, and the movable guide rail comprises a movable transverse rail and a movable longitudinal rail that are staggered with each other. The rebound hammer is provided on the movable guide rail and moves on the movable guide rail.

9. The fully automatic rebound hammer according to claim 8, characterized in that: The first extension portion and the second extension portion have the same contact area with the concrete surface.

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