A concrete intelligent detection and inspection system, equipment and method

Abstract

This scheme belongs to the field of concrete detection, and specifically relates to a concrete intelligent detection and testing system, equipment and method. A concrete intelligent detection and testing equipment includes: a bottom plate and a dark box, a placing table for placing test pieces is fixedly connected in the dark box, a grinding wheel and a rotating shaft coaxially fixedly connected to the grinding wheel are arranged below the placing table, one end of the rotating shaft is fixedly connected to a motor for driving the rotating shaft to rotate, and the other end of the rotating shaft is fixedly connected to a counterweight block, the rotating shafts on both sides of the grinding wheel are rotatably connected to outer shaft wheels, and the lower end of the outer shaft wheel is fixedly connected to a cylinder, the piston rod of the cylinder is fixedly connected to the outer wall of the outer shaft wheel, and a second pressure detection device is arranged on the piston rod of the cylinder, and the cylinder is fixedly connected to the bottom plate; a pressure detection device is fixedly connected to the inner wall of the dark box, and the pressure detection device is used to detect the lateral pressure above the placing table. This scheme solves the problem that it is difficult to conveniently and finely adjust the pressure when testing test pieces.

Description

Technical Field

[0001] The present invention relates to the field of concrete testing, and specifically to a concrete intelligent testing system, equipment and method. Background Art

[0002] Non-pyrophoric fine stone concrete, also known as explosion-proof concrete, is a functional concrete that can withstand impact without sparking. When objects such as metal or hard stone undergo mechanical effects such as friction and impact with this type of concrete, no red burning sparks or sparks will occur, so flammable substances are not easily prone to causing the risk of explosion in fire. It is mostly used in oil depots, chemical plants and other buildings where fire is strictly prohibited or has certain fire protection requirements.

[0003] At present, the test methods, test equipment, test steps and determination of the incombustibility of explosion-proof concrete need to refer to Appendix A of the "Construction Quality Acceptance Code for Building Ground Engineering" (GB50209). This code makes clear provisions for the construction quality acceptance of the incombustible (explosion-proof) surface layer. The test (for incombustible materials) must be carried out in a dark room, using a specified grinding wheel (grinding wheel diameter is 150mm), the speed is controlled at 600~1000r / min, and a friction test is performed on the test piece with a pressure of 10~20N to observe whether sparks are generated to determine the incombustibility of the material.

[0004] In order to provide an explosion-proof inspection device that meets the above-mentioned standards, Chinese patent CN203561573U provides a concrete and mortar non-flammable performance test device, which adds weights of different weights to the test piece in the test fixture to apply external force to the test piece (i.e., explosion-proof concrete block), and controls the external force by the weight of the weight (i.e., controls the pressure to 10-20N). However, when the external force needs to be adjusted, the device needs to add or remove weights one by one, which is cumbersome to operate and difficult to achieve convenient fine adjustment. Summary of the invention

[0005] The purpose of this solution is to provide a concrete intelligent detection and testing system, equipment and method to solve the problem of difficulty in convenient and fine adjustment of pressure when testing specimens.

[0006] In order to achieve the above-mentioned purpose, the present invention provides a concrete intelligent detection and testing equipment, including: a bottom plate and a dark box, a placing table for placing test pieces is fixedly connected in the dark box, a grinding wheel and a rotating shaft coaxially fixedly connected to the grinding wheel are arranged below the placing table, one end of the rotating shaft is fixedly connected to a motor for driving the rotating shaft to rotate, and the other end of the rotating shaft is fixedly connected to a counterweight block, the rotating shafts on both sides of the grinding wheel are rotatably connected to outer shaft wheels, the lower end of the outer shaft wheel is fixedly connected to a cylinder, the piston rod of the cylinder is fixedly connected to the outer wall of the outer shaft wheel, a second pressure detection device is arranged on the piston rod of the cylinder, and the cylinder is fixedly connected to the bottom plate; the inner wall of the dark box is fixedly connected to A pressure detection device is connected, and the pressure detection device is used to detect the lateral pressure above the placement table. A limit groove is provided on the edge of the bottom plate, and the bottom of the dark box is embedded with the bottom plate through the limit groove. The inner wall of the dark box is slidably connected with a gas channel on both sides of the opposite sides, and a clamping rod for clamping the test piece is slidably connected on the side wall of the gas channel. A sealing sleeve is sleeved between the gas channel and the clamping rod to prevent the gas in the gas channel from leaking out. A ventilation valve for controlling the air pressure in the gas channel is fixedly connected to the gas channel, one end of the ventilation valve is connected to the inside of the gas channel, and the other end is connected to the air outside the dark box. A plurality of optical coupling sensors are embedded in the inner wall of the dark box.

[0007] It also includes a processing module, and a relay for controlling the connection or disconnection of the circuit is provided between the processing module and the motor, cylinder and ventilation valve. The processing module is electrically connected to the optocoupler sensor, the second pressure detection device and the pressure detection device. The processing module is used to collect and process the electrical signals emitted by the optocoupler sensor, the second pressure detection device and the pressure detection device.

[0008] A method for intelligent detection and testing of concrete comprises the following steps:

[0009] S10: Place the test piece on the placement table, fit and fix the bottom plate and the dark box, and connect the concrete intelligent detection and testing equipment to the power supply;

[0010] S20: the processing module closes the relay between the vent valve and the power supply, and the vent valve fills air into the gas channel. When the clamping pressure value detected by the first detection device is greater than the preset minimum clamping pressure, the relay between the vent valve and the power supply is disconnected, and the vent valve stops filling air into the gas channel.

[0011] S30: The processing module closes the relay between the motor and the power supply to stabilize the rotor speed of the motor at 600-1000 r / min, closes the relay between the cylinder and the power supply to extend the piston rod of the cylinder until the support pressure value detected by the second pressure detection device increases by 10-20N, disconnects the relay between the cylinder and the power supply, and calculates the friction coefficient by the increase in the support pressure value and the friction value detected by the pressure detection device;

[0012] S40: After the pressure detection device detects the friction value, it counts down the preset friction detection time, calculates the grinding force according to the friction value and friction coefficient detected by the pressure detection device, and stabilizes the grinding force at 10-20N by controlling the current connected to the cylinder; at the same time, it uses the judgment relay to close to see whether the optocoupler sensor detects a spark, and disconnects the power supply connected to the concrete intelligent detection and testing equipment after the spark is detected.

[0013] A concrete intelligent detection and testing system uses a concrete intelligent detection and testing device and a concrete intelligent detection and testing method.

[0014] The principle of this scheme is that after the vent valve inflates the gas channel, the air pressure in the gas channel increases, the clamping rod slidably connected to the side wall of the gas channel slides outward (i.e., slides out toward the specimen), and the clamping rod applies thrust to the specimen after contacting the specimen. The clamping rod that does not contact the specimen slides outward under the action of air pressure until it contacts the specimen or slides to the maximum limit. The clamping rods on both sides of the specimen push the specimen to the opposite side, and the specimen is fixed by the interaction of the clamping rods on both sides. When the specimen is polished and vibrated, the clamping rod on one side is compressed, and the clamping rod compresses the gas after sliding into the gas channel, and the air pressure in the gas channel increases. After the air pressure increases, the gas channel provides greater pressure for the clamping rod, so that the clamping rod provides greater support force to the vibrating specimen; at the same time, the clamping rod on the other side slides outward, the air pressure in the gas channel decreases, and the support force provided by the clamping rod to the specimen decreases. From the above, it can be seen that when the specimen vibrates, the support force provided by the clamping rod to the specimen is unbalanced and opposite to the direction of movement of the specimen, so that the specimen is constrained when vibrating, and the greater the amplitude of vibration (the greater the movement distance), the greater the constraint (the support force opposite to the direction of movement), thereby making the specimen less likely to vibrate (the clamping provided by the clamping module is more stable).

[0015] After the clamping rod clamps the specimen firmly, the motor is started, and the motor drives the coaxially fixed rotating shaft to rotate, and the grinding wheel coaxially fixedly connected to the rotating shaft rotates, and then the cylinder is started, and the piston rod of the cylinder extends, and the rotating shaft connected to the outer shaft wheel, the grinding wheel fixedly connected to the rotating shaft, the motor, and the seed block are lifted upward through the fixedly connected outer shaft wheel. After the grinding wheel and the specimen are in contact, the detection value detected by the second pressure detection device on the piston rod changes, and the changed value is the support force of the grinding wheel on the specimen (because the wear of the grinding wheel is very small when grinding just starts, the weight of the grinding wheel has no effect on the detection value detected by the second pressure detection device). After the grinding wheel contacts the specimen, the gas channel holding the specimen slides toward the pressure detection device under the influence of the specimen until the side (the side of the gas channel) contacts the pressure detection device (the pressure detection device detects the friction force), and the value detected by the pressure detection device is the friction force between the specimen and the grinding wheel. The friction coefficient between the specimen and the grinding wheel can be obtained by detecting the changed detection value (the support force of the grinding wheel on the specimen) and the friction force by the second pressure detection device. As the grinding time of the grinding wheel increases, the influence of the grinding wheel weight on the detection value detected by the second pressure detection device increases. The detection result of the second pressure detection device cannot be used as the supporting force of the grinding wheel on the test piece. At this time, the grinding force of the grinding wheel can be accurately obtained by the obtained friction coefficient and the friction force detected by the pressure detection device.

[0016] The technical effect of this solution is that the grinding force obtained by this solution through the friction coefficient and friction force avoids the influence caused by the grinding loss of the grinding wheel and the test piece during direct measurement, making the grinding force more accurate, and the grinding force can be determined by the friction force detected in real time, and the magnitude of the grinding force is controlled by the current through the real-time grinding force (the current controls the extension and contraction length of the cylinder). This method can quickly adjust the grinding force, solve the problem that the pressure is difficult to adjust conveniently, and the current passed into the cylinder can be adjusted at will as needed, solving the problem that the pressure is difficult to adjust finely. At the same time, the way of clamping the test piece in this solution can adjust the support force of the stabilization time according to the vibration of the test piece during grinding, provide better stability for the test piece, reduce the influence of vibration on the test piece during grinding, and thus make the grinding force less affected, make the grinding force test more accurate, and make the grinding force effect better.

[0017] In summary, this solution solves the problem of difficulty in convenient and fine adjustment of pressure (grinding force) when inspecting test pieces.

[0018] Furthermore, a first pressure detection device is provided on the clamping rod, and a hard alloy ball is fixedly connected to one end of the clamping rod that contacts the test piece.

[0019] Furthermore, when the processing module receives the electrical signal transmitted by the first pressure detection device, it converts the electrical signal transmitted by the first pressure detection device into a clamping pressure value, and determines whether the clamping pressure value exceeds the preset minimum clamping pressure. If it exceeds, the relay between the motor, the cylinder and the power supply is closed, and the power supply connected to the motor is first adjusted to make the motor rotor rotate at a preset grinding speed, and then the power supply connected to the cylinder is controlled to extend the piston rod of the cylinder. At the same time, the electrical signal transmitted by the second pressure detection device and the pressure detection device is received, and converted into a supporting pressure value and a friction force value. When the increased value of the supporting pressure value is the same as the preset grinding force, the current connected to the cylinder is controlled to stop the piston cylinder from extending, and the increased value of the supporting pressure value is combined with the friction force value to calculate the friction coefficient, and then the friction coefficient is combined with the friction force value to determine the grinding force of the concrete.

[0020] Furthermore, the processing module is also used to control the current connected to the vent valve by changing the clamping pressure value. When the rotor of the motor rotates, if the clamping pressure value change exceeds the preset clamping pressure change, the current connected to the vent valve is adjusted to allow the vent valve to fill air into the gas channel until the clamping pressure value change is smaller than the preset clamping pressure change, and the vent valve is controlled to close.

[0021] During grinding, if the clamping force of the specimen is insufficient, the specimen will vibrate. When the specimen vibrates, the clamping pressure detected by the first pressure detection device on the clamping rod fluctuates with the vibration of the specimen. At this time, increasing the air pressure in the gas channel can increase the clamping force of the clamping module on the specimen, so that the specimen is more effectively constrained (the specimen is more stable) and the impact on grinding is reduced.

[0022] Furthermore, the processing module is used to control the current connected to the cylinder to shrink the cylinder piston rod to the shortest, disconnect the power supply connected to the motor, and issue a prompt of concrete damage when the clamping pressure value and the friction force value pressure change amplitude exceeds a preset maximum change value within a preset minimum change time.

[0023] When the hardness of the specimen is insufficient, it is easy to break or crack on the surface under high-pressure clamping and grinding. When the surface cracks, the clamping rod shakes more obviously. Stopping grinding at this time can avoid the risk of collapse caused by grinding and breaking the specimen (specimen collapse will damage internal parts).

[0024] Furthermore, the processing module is used to determine whether the change amplitude of the friction force value is greater than a maximum preset maximum stable amplitude when the change amplitude of the clamping pressure value is smaller than a preset clamping pressure change and the current connected to the motor is stable. If greater than, the current connected to the cylinder is controlled to shrink the cylinder piston rod to the shortest, and determine whether the change amplitude of the supporting pressure value is greater than a preset grinding wheel stable change amplitude. If greater than, a prompt of grinding wheel instability is issued; if less than, a prompt of piston rod instability is issued.

[0025] When the value detected by the first pressure detection device does not change significantly, but the friction force (the value detected by the pressure detection device) changes significantly, the test piece shakes significantly on the pressure detection device. At this time, the cause of the shaking may be caused by the instability of the grinding wheel and the cylinder, or it may be caused by the instability of the cylinder. The cylinder is retracted to the shortest, but the grinding wheel continues to rotate. If the pressure value detected by the second pressure detection device changes significantly, it means that when the grinding wheel rotates, there is instability between the outer wheel shaft, grinding wheel, rotating shaft, motor, and accessories. If the pressure value changes significantly, it means that the cylinder and the base plate are loose. In this way, the reason why the concrete intelligent detection and testing equipment cannot work normally can be quickly determined during the process of shutting down the concrete intelligent detection and testing equipment, saving troubleshooting time.

[0026] Furthermore, after turning off the power, the following steps are also included:

[0027] S51: Separate the dark box and the bottom plate, and record the relative position information of the test piece and the placement table;

[0028] S52: remove the test piece, measure the diameter D of the indentation left by the alloy ball on the surface of the test piece, calculate the indentation depth h according to the indentation diameter D and the radius d of the alloy ball, and calculate the indentation area A according to the indentation diameter D and the indentation depth h;

[0029] S53: determining the clamping rod corresponding to each indentation according to the relative position information and the relative position information between the placement table and the clamping rod, and calculating the Brinell hardness HBW of the surface of the specimen using the last stable clamping pressure f of the clamping rod and the indentation area A;

[0030] S54: Analyze the uniformity of hardness distribution on the specimen surface based on multiple Brinell hardness values ​​HBW.

[0031] The carbide ball will leave an indentation on the surface of the specimen when it is stably clamped. The alloy ball fits into the specimen through the indentation, making the specimen more stably clamped. At the same time, the Brinell hardness of the specimen can be calculated by the indentation and the clamping pressure during stable clamping. Since there are a large number of clamping rods and the clamping positions are evenly distributed, the amount of data collected for hardness calculation is large, and the calculated hardness can be compared with each other, making the calculated hardness more reliable; at the same time, the hardness distribution of the specimen surface can be analyzed by comparing the hardness at different positions, so that a more comprehensive understanding of the hardness of the specimen can be obtained.

[0032] Furthermore, before calculating the hardness, incomplete or overlapping indentations are excluded, and when determining the clamping pressure f, indentations corresponding to the clamping pressure f with insufficient stabilization time are excluded.

[0033] Since the clamping position and clamping pressure may be adjusted multiple times before stable clamping, the indentations are prone to overlap, cover or incomplete. Eliminating incomplete or overlapping indentations can make the hardness calculation results more accurate. Insufficient stabilization time will also affect the hardness calculation results. Eliminating the indentations corresponding to the clamping pressure f with insufficient stabilization time can further make the hardness calculation results more accurate. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 It is a front cross-sectional view of an intelligent concrete detection and testing device in an embodiment of the present invention.

[0035] Figure 2 It is a side cross-sectional view of an intelligent concrete detection and testing device in an embodiment of the present invention.

[0036] Figure 3 for Figure 1 Schematic diagram of the enlarged part A.

[0037] Figure 4 The present invention is a flowchart of a method for intelligent detection and testing of concrete in an embodiment of the present invention.

[0038] Figure 5 for Figure 1 Schematic diagram of the enlarged portion B.

[0039] The following is a further detailed description through specific implementation methods:

[0040] The figure marks in the drawings of the specification include: 1. ventilation pipe; 2. ventilation valve; 3. gas channel; 4. base plate; 5. motor; 6. counterweight; 7. placement table; 8. clamping rod; 9. optical coupler sensor; 10. grinding wheel; 11. limit groove; 12. dark box; 13. cylinder; 14. pressure detection device; 15. alloy ball; 16. sealing sleeve; 17. handle; 18. rotating shaft; 19. outer shaft wheel. DETAILED DESCRIPTION

[0041] The following will clearly and completely describe the concept and technical effects of the present invention in combination with the embodiments, so as to fully understand the purpose, features and effects of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, other embodiments obtained by those skilled in the art without creative work are all within the scope of protection of the present invention:

[0042] like Figure 1 As shown, a concrete intelligent detection and testing device includes: a bottom plate 4 and a dark box 12, the edge of the bottom plate 4 is provided with a limiting groove 11, and the bottom of the dark box 12 is embedded with the bottom plate 4 through the limiting groove 11.

[0043] In this embodiment, the specific shape of the dark box 12 is not limited, as long as the dark box 12 has a light shielding effect.

[0044] A placement table 7 for placing the test piece is fixedly connected inside the dark box 12 .

[0045] In this embodiment, the method of fixing the dark box 12 and the placement table 7 is not limited, as long as the placement table 7 can maintain a stable fixing effect with the inner wall of the dark box 12.

[0046] Specifically, a gap is left in the middle of the placement table 7 (such as Figure 1 and Figure 2 As shown), the gap is used to accommodate the grinding wheel 10. The diameter of the gap should be slightly larger than the grinding wheel 10, and a certain distance should be maintained from the grinding wheel 10 when the grinding wheel 10 is placed.

[0047] In one embodiment, an electromagnetic coil is provided in the placement table 7, and the electromagnetic coil is embedded in the inner wall of the gap of the placement table 7. When the electromagnetic coil is energized, it provides a magnetic field that repels the grinding wheel 10, and increases the stability of the grinding wheel 10 when the grinding wheel 10 is grinding. When the equipment connected to the grinding wheel 10 leaks electricity and causes the grinding wheel 10 to carry current, the magnetic field of the electromagnetic coil changes, and the current in the electromagnetic coil also changes accordingly. By monitoring the current of the electromagnetic coil, the leakage can be discovered in time, reducing or even avoiding the serious consequences of the leakage.

[0048] A grinding wheel 10 and a rotating shaft 18 coaxially fixedly connected to the grinding wheel 10 are provided below the placement table 7. One end of the rotating shaft 18 is fixedly connected to a motor 5 for driving the rotating shaft 18 to rotate, and the other end of the rotating shaft 18 is fixedly connected to a counterweight 6. The rotating shafts 18 on both sides of the grinding wheel 10 are rotatably connected to outer shaft wheels 19, and the lower end of the outer shaft wheel 19 is fixedly connected to a cylinder 13, and the piston rod of the cylinder 13 is fixedly connected to the outer wall of the outer shaft wheel 19. A second pressure detection device is provided on the piston rod of the cylinder 13, and the cylinder 13 is fixedly connected to the base plate 4.

[0049] Specifically, Figure 5 and Figure 1As shown, the piston rod of the cylinder 13 is fixedly bonded to the outer wall of the outer shaft wheel 19, and a plurality of freely rotatable metal balls are arranged between the outer shaft wheel 19 and the rotating shaft 18. Two sections of the outer shaft wheel 19 are rotatably connected on both sides of the middle of the rotating shaft 18, and the two sections of the outer shaft wheel 19 are fixedly bonded to the cylinder 13. The bottom of the cylinder 13 is fixedly bonded to the bottom plate 4. The two cylinders 13 extend or retract together to lift or drag down the two sections of the outer shaft wheel 19 together. Since the outer shaft wheel 19 and the rotating shaft 18 are rotatably connected, the rotating shaft 18 moves up and down synchronously when the two sections of the outer shaft wheel 19 move up and down, and can also rotate during the up and down movement. One end of the rotating shaft 18 is fixedly bonded to the rotor of the motor 5, and the other end is fixedly bonded to a counterweight 6. The weight of the counterweight 6 is determined according to the weight of the motor 5. The counterweight 6 is used to keep the two ends of the rotating shaft 18 balanced during the movement and rotation process. In the middle of the rotating shaft 18, a grinding wheel 10 fixedly bonded to the rotating shaft 18 is provided between the two sections of the outer shaft wheel 19. When the motor 5 is started and the rotor of the motor 5 rotates, the rotating shaft 18 is driven to rotate, and the rotating shaft 18 drives the grinding wheel 10 to rotate. When the grinding wheel 10 rotates, the piston rods of the two cylinders 13 extend synchronously, lifting the rotating grinding wheel 10 upward, so that the grinding wheel 10 grinds the test piece, and the current of the cylinder 13 controls the supporting force of the piston rod of the cylinder 13 on the outer shaft wheel 19 to control the grinding force of the grinding wheel 10 on the test piece.

[0050] A pressure detection device 14 is fixedly connected to the inner wall of the dark box 12, and the pressure detection device 14 is used to detect the lateral pressure above the placement table 7. The gas channel 3 is slidably connected to the opposite sides of the inner wall of the dark box 12, and a clamping rod 8 for clamping the test piece is slidably connected to the side wall of the gas channel 3. A sealing sleeve 16 is sleeved between the gas channel 3 and the clamping rod 8 to prevent the gas in the gas channel 3 from leaking out. A vent valve 2 for controlling the air pressure in the gas channel 3 is fixedly connected to the gas channel 3. One end of the vent valve 2 is connected to the inside of the gas channel 3, and the other end is connected to the air outside the dark box 12.

[0051] In the embodiment of the present solution, the pressure detection device 14 is fixedly bonded to the inner wall of the dark box 12, such as Figure 2 As shown, the pressure detection device 14 is located above the placement table 7 , and after the gas channel 3 slides, the side surface of the gas channel 3 fits with the surface of the pressure detection device 14 .

[0052] In a more specific embodiment of this solution, Figure 2As shown, the gas channel 3 is slidably connected with 36 clamping rods 8 distributed in a matrix. After the clamping rod 8 clamps the test piece, the cylinder 13 lifts the rotating grinding wheel 10, and the grinding wheel 10 grinds the test piece after contacting the test piece. After the grinding wheel 10 contacts the bottom of the test piece, the grinding wheel 10 rotates, and there is friction between the grinding wheel 10 and the test piece. The grinding wheel 10 pushes the test piece toward the pressure detection device 14 (the grinding wheel 10 rotates toward the pressure detection device 14), the test piece is fixedly connected with the clamping rod 8 (the clamping rod 8 stably clamps the test piece), the gas channel 3 is slidably connected with the side wall of the dark box 12, and the gas channel 3 and the clamping rod 8 move toward the pressure detection device 14. The side of the specimen close to the pressure detection device 14 is farther away from the gas channel 3. The gas channel 3 first contacts and fits the pressure detection device 14, and the pressure detection device 14 immediately detects the friction force (the specimen and the gas channel 3 are stationary under the combined action of the grinding wheel 10 and the pressure detection device 14. The grinding wheel 10 is located directly below the specimen. The gap between the gas channel 3 and the pressure detection device 14 is extremely small. There is almost no relative displacement between the grinding wheel 10 and the specimen. The friction force between the grinding wheel 10 and the specimen is opposite to the support force provided by the pressure detection device 14 to the specimen), and transmits the electrical signal of the friction force to the processing module.

[0053] In the embodiment of the present solution, the outer wall of the gas channel 3 is slidably connected to the inner wall of the dark box 12, such as Figure 1 and Figure 2 As shown, the inner wall of the dark box 12 is provided with a slide groove, and the gas channel 3 is provided with a slide rail that matches the slide groove of the inner wall of the dark box 12. The side wall of the dark box 12 is provided with a vent hole, and a vent valve 2 is fixedly connected above the gas channel 3. One end of the vent valve 2 is connected to the inside of the gas channel 3, and the other end is connected to the air through a vent pipe 1. One end of the vent pipe 1 is connected to the vent hole on the side wall of the dark box 12 and fixedly adhered, and the other end is connected to the vent valve 2 and fixedly adhered. Among them, the vent pipe 1 is made of a flexible material (such as soft plastic). Figure 1 As shown, a clamping rod 8 is slidably connected to the side wall of the dark box 12.

[0054] Specifically, Figure 3 As shown, a sealing sleeve 16 is provided between the clamping rod 8 and the side wall of the dark box 12 . The sealing sleeve 16 is fixedly connected to the side wall of the dark box 12 . The sealing sleeve 16 is used to prevent the gas in the gas channel 3 from leaking out, or the gas in the dark box 12 from being pressed into the gas channel 3 .

[0055] Specifically, an anti-slip block is provided at one end of the clamping rod 8 located in the gas channel 3 . The shape of the anti-slip block is not limited. The size of the anti-slip block is larger than the outer contour of the sealing sleeve 16 . The anti-slip block is fixedly bonded to the bottom of the clamping rod 8 .

[0056] Specifically, Figure 3As shown, a hard alloy ball 15 is fixedly bonded to one end of the clamping rod 8 outside the gas channel 3. The material of the alloy ball 15 is generally selected from hard materials such as copper, iron, and diamond.

[0057] More specifically, when selecting the material of the alloy ball 15 , a material harder than the test piece is selected based on the hardness of the test piece.

[0058] Specifically, the clamping rod 8 is provided with a first pressure detection device. In the embodiment of this scheme, the first pressure detection device is fixedly bonded to the top of the clamping rod 8 near the alloy ball 15.

[0059] A plurality of optical coupler sensors 9 are embedded in the inner wall of the dark box 12 .

[0060] In the embodiment of the present scheme, the optical coupler sensor 9 is arranged on the inner wall of the dark box 12 on the opposite side of the pressure sensing device. When the grinding wheel 10 contacts the test piece, the side wall of the dark box 12 is closer to the contact point between the grinding wheel 10 and the test piece, making it easier to detect sparks. At the same time, in the embodiment of the present scheme, 20 optical coupler sensors 9 are arranged in a matrix so that the shooting range of the matrix optical coupler covers the space between the two gas channels 3. The 20 monitoring results collected by the 20 optical couplers are complemented and verified, which can more comprehensively and accurately determine the occurrence of sparks.

[0061] In other embodiments of the present solution, the number, position and arrangement of the optical couplers are determined according to the shapes and positions of other internal parts such as the gas channel 3, the dark box 12, the clamping rod 8, etc.

[0062] In the embodiment of the present scheme, the dark box 12 is divided into a top plate and a side plate, and the lower end of the side plate is embedded with the bottom plate 4. After embedding, the bottom plate 4 and the side plate can be fixed together by means of lock buckles, nut connections, etc. The embedding and fixing of the bottom plate 4 and the side plate can prevent the placing table 7 from shaking during grinding, and also have a shading effect; the bottom plate 4 is separated from the side plate, and the motor 5, the cylinder 13, and the grinding wheel 10 can be replaced, repaired, and cleaned. There is a flexible detachable structure between the side plate and the top plate, and a handle 17 is fixedly adhered to the outside of the top plate. After continuous grinding of the test piece, the accumulated dust may not be enough to clean up, and the grinding wheel 10, the cylinder 13, and the motor 5 do not need maintenance. It is only necessary to replace the next test piece to continue testing. At this time, it is only necessary to separate the top plate and the side plate through the handle 17 and directly replace the test piece; during testing, covering the top plate can ensure sufficient shading effect.

[0063] In another embodiment of the present invention, when the side panels are separated from the top panel, the components on the placement table 7 are inspected, cleaned or replaced.

[0064] The processing module is used to receive the electrical signal transmitted by the first pressure detection device, convert the electrical signal transmitted by the first pressure detection device into a clamping pressure value, and determine whether the clamping pressure value exceeds the preset minimum clamping pressure (generally 10N, which can be specifically set by the processing module). If it exceeds, close the relay between the motor 5, the cylinder 13 and the power supply, first adjust the power supply connected to the motor 5 to make the rotor of the motor 5 rotate at a preset grinding speed (600-1000r / min), and then control the power supply connected to the cylinder 13 to extend the piston rod of the cylinder 13. At the same time, receive the electrical signal transmitted by the second pressure detection device and the pressure detection device 14, and convert it into a supporting pressure value and a friction value. When the value of the increase in the supporting pressure value is the same as the preset grinding force (10-20N), control the current connected to the cylinder 13 to stop the piston cylinder from extending, and combine the value of the increase in the supporting pressure value with the friction value to calculate the friction coefficient, and then combine the friction coefficient with the friction value to determine the grinding force of the concrete.

[0065] In the embodiment of the present scheme, when the processing module receives the electrical signal transmitted by the first pressure detection device, the clamping rod 8 contacts the specimen, and the processing module performs AD conversion on the received electrical signal, and uses the converted value as the clamping pressure value. When the clamping pressure value exceeds the preset minimum clamping pressure (10N), the specimen is considered to be clamped stably. After the specimen is clamped stably, power is supplied to the motor 5, and the speed of the grinding wheel 10 is controlled at (600-1000r / min) by the motor 5. Then power is supplied to the two cylinders 13, and the cylinders 13 lift the rotating grinding wheel 10. After the grinding wheel 10 slowly contacts the specimen, it applies pressure to the specimen for grinding. The processing device receives the electrical signal AD of the second pressure detection device and converts it into a supporting pressure value. When the supporting pressure value changes by 15N, the piston rod of the cylinder 13 stops retracting. The processing device receives the electrical signal AD of the pressure detection device 14 and converts it into a friction value, and combines the friction value detected after the supporting pressure value changes by 15N with the supporting pressure value, and calculates the ratio of the friction value to the supporting pressure value as the friction coefficient. After 2 consecutive seconds, the average of the friction coefficients obtained within 2 seconds is taken as the determined friction coefficient, and the product of the friction coefficient and the friction force value is taken as the measured grinding force. When the grinding force is not greater than 10N, the piston rod of the control cylinder 13 is slowly extended. When the grinding force is not less than 20N, the piston rod of the control cylinder 13 is slowly contracted. When the grinding force is 10-20N, the piston rod of the control cylinder 13 remains stationary.

[0066] Among them, the processing module is also used to control the current connected to the vent valve 2 by changing the clamping pressure value. When the rotor of the motor 5 rotates, if the clamping pressure value change amplitude exceeds the preset clamping pressure change (generally 1N, which can be specifically set by the processing unit), the current connected to the vent valve 2 is adjusted to allow the vent valve 2 to fill air into the gas channel 3 until the clamping pressure value change amplitude is smaller than the preset clamping pressure change, and the vent valve 2 is controlled to be closed.

[0067] In the embodiment of the present scheme, when the grinding wheel 10 rotates, if the amplitude of the clamping pressure value change exceeds the preset clamping pressure change, it is considered that the specimen is not clamped stably and the clamping pressure needs to be increased. Air is filled into the gas channel 3 through the vent valve 2 to increase the air pressure in the gas channel 3, so that the clamping rod 8 increases the force on the specimen under a larger air pressure, thereby increasing the clamping pressure until the amplitude of the clamping pressure value change is smaller than the preset clamping pressure change. In this case, the specimen is considered to be stably clamped, and the filling of air into the gas channel 3 is stopped, and the air pressure in the gas channel 3 is kept unchanged.

[0068] Among them, the processing module is used to control the current connected to the cylinder 13 to shrink the piston rod of the cylinder 13 to the shortest, disconnect the power supply connected to the motor 5, and issue a prompt of concrete damage when the clamping pressure value and the friction force value suddenly change (within the preset shortest change time, generally within 1s, which can be specifically set through the processing module; the change amplitude of the friction force value, the clamping pressure value or the supporting pressure value exceeds the preset maximum change value, generally within 5N, which can be specifically set through the processing module).

[0069] Among them, the processing module is used to determine whether the change amplitude of the friction force value is greater than the maximum preset maximum stable amplitude when the change amplitude of the clamping pressure value is smaller than the preset clamping pressure change and the current connected to the motor 5 is stable. If greater than, the current connected to the cylinder 13 is controlled to make the piston rod of the cylinder 13 shrink to the shortest, and determine whether the change amplitude of the supporting pressure value is greater than the preset stable change amplitude of the grinding wheel 10. If greater than, a prompt that the grinding wheel 10 is unstable is issued, and if less than, a prompt that the piston rod is unstable is issued.

[0070] In the embodiment of the present scheme, when the specimen is stably clamped, the grinding wheel 10 and other parts fixedly connected to the grinding wheel 10 are unstable. The vibration of the grinding wheel 10 during grinding will cause the specimen to vibrate, and the friction value detected by the pressure detection device 14 will change. Generally, the diameter of the grinding wheel 10 is continuously reduced during grinding (both the specimen and the grinding wheel 10 are worn), and the vibration of the grinding wheel 10 is small, which does not affect the grinding or the operation of the intelligent concrete detection and inspection equipment. However, when the grinding wheel 10 vibrates greatly, it is very likely that there is a large gap between the parts. In the case of looseness, the operation of the grinding wheel 10 is likely to cause the parts to collapse. At this time, the piston rod of the cylinder 13 is retracted to separate the specimen and the grinding wheel 10, and the grinding is stopped, which can avoid the danger caused by continuous grinding. When descending, the support force value detected by the second pressure detection device is only affected by the gravity of the parts. If the parts are fixed without much looseness, the support force value detected by the second pressure detection device when the grinding wheel 10 rotates will not change much. The grinding vibration is caused by the cylinder 13 or the plug rod sand not being stably fixed. If the supporting force value detected by the second pressure detection device changes greatly, it means that the center of gravity between the parts changes frequently, which means that there is a large gap between the parts.

[0071] A concrete intelligent detection and testing equipment also includes a processing module. A relay for controlling the connection or disconnection of the circuit is provided between the processing module and the motor 5, the cylinder 13 and the ventilation valve 2. The processing module is electrically connected to the optical coupling sensor 9, the second pressure detection device and the pressure detection device 14. The processing module is used to collect and process the electrical signals emitted by the optical coupling sensor 9, the second pressure detection device and the pressure detection device 14.

[0072] The embodiment of the present invention also provides a concrete intelligent detection and testing method, specifically as follows Figure 4 Place;

[0073] Depend on Figure 4 It can be seen that the concrete intelligent detection and inspection method includes the following steps:

[0074] S10: placing the test piece on the placing table 7, fitting and fixing the bottom plate 4 and the dark box, and connecting the concrete intelligent detection and testing equipment to a power source;

[0075] In the embodiment of this scheme, the operator fits the bottom plate 4 and the side plates together and locks them, places the test piece on the placement table 7, and then holds the handle 17 to close the top plate, and locks the top plate and the side plates. Connect the intelligent concrete detection and testing equipment to a power source.

[0076] S20: the processing module closes the relay between the ventilation valve 2 and the power supply, and the ventilation valve 2 fills air into the gas channel 3. When the clamping pressure value detected by the first detection device is greater than the preset minimum clamping pressure, the relay between the ventilation valve 2 and the power supply is disconnected, and the ventilation valve 2 stops filling air into the gas channel 3;

[0077] In an embodiment of the present scheme, after the processing module is connected to the power supply, the relay connecting the ventilation valve 2 to the power supply is closed. After the relay is closed, the ventilation valve 2 is controlled by the modulation circuit connected to the ventilation valve 2 to fill air into the gas channel 3. As the air is continuously filled in, the 36 clamping rods 8 slide out of the gas channel 3.

[0078] S30: The processing module closes the relay between the motor 5 and the power supply to stabilize the rotor speed of the motor 5 at 600-1000 r / min, closes the relay between the cylinder 13 and the power supply to extend the piston rod of the cylinder 13 until the supporting pressure value detected by the second pressure detection device increases by 10-20N, disconnects the relay between the cylinder 13 and the power supply, and calculates the friction coefficient by the value of the increased supporting pressure value and the friction value detected by the pressure detection device;

[0079] Among them, the value detected by the pressure detection device 14 is used as the friction value. When the friction value is collected, the clamping pressure is collected. If the clamping pressure fluctuates and the difference between the maximum and minimum values ​​exceeds the preset pressure difference, or the cumulative difference between the clamping pressures exceeds the preset total pressure difference, the ventilation valve 2 is controlled to inflate until the test piece is firmly clamped.

[0080] Specifically, when the friction force value is collected (the grinding wheel 10 and the pressure detection device 14 jointly provide support force to the specimen), the vibration amplitude of the specimen during grinding is judged by collecting the fluctuation of the clamping pressure. When the shaft 18 of the motor 5 rotates, that is, when the grinding wheel 10 starts to grind the specimen, the specimen vibrates with the grinding of the grinding wheel 10. If the clamping force is not enough at this time, the specimen will vibrate. At this time, the air pressure in the gas channel 3 is adjusted according to the fluctuation of the clamping pressure, so that the specimen can be clamped more stably according to the specific grinding conditions.

[0081] In another specific case, the clamping pressure hardly changes, but the friction force value detected by the pressure detection device 14 fluctuates significantly. At this time, the test piece vibrates between the pressure detection device 14 and the grinding wheel 10, and the gas channel 3 slides accordingly (it can be seen that the pressure detection device 14 is stationary relative to the placement table 7). The grinding wheel 10 vibrates significantly at this time. Stopping grinding and checking the cause of the vibration of the grinding wheel 10 can avoid more serious impact on parts such as the grinding wheel 10, the motor 5, and the cylinder 13.

[0082] In another specific case, if the clamping pressure detected on a part of the clamping rod 8 drops suddenly during the process of clamping the test piece, and the friction force value monitored by the pressure detection device 14 is stable, the grinding speed of the test piece can be inferred by the position and change amount of the clamping rod 8 where the clamping pressure value drops suddenly, and the grinding time is adjusted according to the grinding speed of the test piece;

[0083] If the clamping pressure detected on part of the clamping rod 8 drops suddenly during the process of clamping the test piece, and the friction value monitored by the pressure detection device 14 is unstable, the cylinder 13 contracts the piston rod to move the motor 5 and the grinding wheel 10 away from the test piece, and controls the vent valve 2 to exhaust air outwards. When the clamping pressure cannot be detected, the vent valve 2 is controlled to inflate. If the clamping pressure cannot be detected after the clamping rod 8 slides out the maximum distance, a warning sound of the test piece abnormality is issued, and all relays are closed.

[0084] S40: After the pressure detection device detects the friction value, it counts down the preset friction detection time, calculates the grinding force according to the friction value and friction coefficient detected by the pressure detection device 14, and stabilizes the grinding force at 10-20N by controlling the current connected to the cylinder 13; at the same time, it uses the judgment relay to close to see whether the optical coupler sensor 9 detects a spark, and disconnects the power supply connected to the concrete intelligent detection and testing equipment after the end.

[0085] In an embodiment of the present solution, before disconnecting the power supply connected to the intelligent concrete detection and testing equipment, the following steps are also included:

[0086] S41: Control the piston rod of the air cylinder 13 to retract, and the motor 5 and the grinding wheel 10 coaxially connected to the motor 5 move away from the test piece as the piston rod retracts, until the piston rod retracts to the maximum limit;

[0087] S42: the vent valve 2 releases the gas in the gas channel 3, and the first pressure detection devices on all the clamping rods 8 cannot detect the clamping pressure.

[0088] After turning off the power, the following steps are also included:

[0089] S51: Separate the dark box 12 and the bottom plate 4, and record the relative position information of the test piece and the placement table 7;

[0090] S52: Remove the test piece, measure the diameter D of the indentation left by the alloy ball 15 on the surface of the test piece, calculate the indentation depth h according to the indentation diameter D and the radius d of the alloy ball 15, and calculate the indentation area A according to the indentation diameter D and the indentation depth h. The calculation formula of h is shown in the following formula (1), and the calculation formula of A is shown in the following formula (2):

[0091] (1),

[0092] A= Dh (2);

[0093] S53: Determine the clamping rod 8 corresponding to each indentation according to the relative position information and the relative position information between the placement table 7 and the clamping rod 8, and use the last stable clamping pressure f of the clamping rod 8 and the indentation area A to obtain the Brinell hardness HBW of the specimen surface. Specifically, the calculation formula (3) of HBW is as follows:

[0094] f / A (3);

[0095] S54: Analyze the uniformity of hardness distribution on the specimen surface based on multiple Brinell hardness values ​​HBW.

[0096] Specifically, before calculating the hardness, incomplete or overlapping indentations are excluded, and when determining the clamping pressure f, indentations corresponding to the clamping pressure f with insufficient stabilization time are excluded.

[0097] A concrete intelligent detection and testing system uses a concrete intelligent detection and testing device and a concrete intelligent detection and testing method. The specific details are not repeated in this embodiment.

[0098] In the embodiment of the present scheme, 20 optical couplers 9, pressure detection device 14 and first pressure detection device are electrically connected to the processing module respectively, and the above components transmit the detected data to the processing module using electrical signals, and the processing module performs AD conversion on the received electrical signals. A modulation circuit composed of relays and resistors is connected between the processing module and the ventilation valve 2, cylinder 13 and motor 5. The processing module controls the current connected to the ventilation valve 2, cylinder 13 and motor 5 by controlling the closing or punching of the relay in the modulation circuit, and controls the extension and contraction of the ventilation cylinder 13, the speed of the motor 5 and the ventilation of the ventilation valve 2 by controlling the current.

[0099] In another embodiment of the present scheme, a modulation circuit and a current monitoring device are connected between the processing module and the electromagnetic coil. The processing module controls the current in the electromagnetic coil through the modulation circuit to control the repulsive force on the grinding wheel 10 (the two electromagnetic coils jointly repel the grinding wheel 10 to stabilize the grinding wheel 10 in the middle position), and analyzes the vibration amplitude of the grinding wheel 10 through the current difference of the electromagnetic coils on both sides (when the grinding wheel 10 vibrates, the distance between the grinding wheel 10 and the electromagnetic coil changes, the magnetic field of the electromagnetic coil changes, and the current of the electromagnetic coil changes), and adjusts the current of the electromagnetic coil according to the vibration amplitude of the grinding wheel 10 to increase the stability of the grinding wheel 10.

[0100] In another embodiment of the present scheme, when the motor 5 or the cylinder 13 leaks electricity, the fixedly connected grinding wheel 10 also carries current. This time, the magnetic fields of the electromagnetic coils on both sides change dramatically, and the currents in the electromagnetic coils on both sides are obvious. The leakage situation can be judged by the currents and current changes of the electromagnetic coils on both sides. The specific leakage device can be inferred by the current sizes on both sides combined with the power and power consumption of the grinding wheel 10 and the cylinder 13.

[0101] The above is only an embodiment of the present invention, and the common knowledge such as the known specific structure and characteristics in the scheme is not described in detail here. It should be pointed out that for those skilled in the art, several deformations and improvements can be made without departing from the structure of the present invention, which should also be regarded as the protection scope of the present invention, and these will not affect the effect of the implementation of the present invention and the practicality of the patent. The scope of protection required by this application shall be based on the content of its claims, and the specific implementation methods and other records in the specification can be used to interpret the content of the claims.

Claims

1. A concrete intelligent detection and testing equipment, characterized in that: include: A bottom plate and a dark box, wherein a placing table for placing test pieces is fixedly connected inside the dark box, a grinding wheel and a rotating shaft coaxially fixedly connected to the grinding wheel are arranged below the placing table, one end of the rotating shaft is fixedly connected to a motor for driving the rotating shaft to rotate, and the other end of the rotating shaft is fixedly connected to a counterweight block, the rotating shafts on both sides of the grinding wheel are rotatably connected to outer shaft wheels, the lower end of the outer shaft wheel is fixedly connected to a cylinder, the piston rod of the cylinder is fixedly connected to the outer wall of the outer shaft wheel, a second pressure detection device is arranged on the piston rod of the cylinder, and the cylinder is fixedly connected to the bottom plate; a third pressure detection device is fixedly connected to the inner wall of the dark box, and the third pressure detection device The detection device is used to detect the lateral pressure above the placement table. The edge of the bottom plate is provided with a limit groove. The bottom of the dark box is embedded with the bottom plate through the limit groove. The inner wall of the dark box is slidably connected with a gas channel on two opposite sides. A clamping rod for clamping the test piece is slidably connected on the side wall of the gas channel. A sealing sleeve is sleeved between the gas channel and the clamping rod to prevent the gas in the gas channel from leaking out. A vent valve for controlling the air pressure in the gas channel is fixedly connected to the gas channel. One end of the vent valve is connected to the inside of the gas channel, and the other end is connected to the air outside the dark box. A plurality of optical coupling sensors are embedded in the inner wall of the dark box. It also includes a processing module, and a relay for controlling the connection or disconnection of the circuit is provided between the processing module and the motor, cylinder and ventilation valve. The processing module is electrically connected to the optocoupler sensor, the second pressure detection device and the third pressure detection device. The processing module is used to collect and process the electrical signals emitted by the optocoupler sensor, the second pressure detection device and the third pressure detection device.

2. The intelligent concrete detection and testing equipment according to claim 1 is characterized in that: The clamping rod is provided with a first pressure detection device, and a hard alloy ball is fixedly connected to one end of the clamping rod in contact with the test piece.

3. The intelligent concrete detection and testing equipment according to claim 2 is characterized by: The processing module is used to receive the electrical signal transmitted by the first pressure detection device, convert the electrical signal transmitted by the first pressure detection device into a clamping pressure value, and determine whether the clamping pressure value exceeds the preset minimum clamping pressure. If it exceeds, close the relay between the motor, the cylinder and the power supply, first adjust the power supply connected to the motor to make the motor rotor rotate at a preset grinding speed, and then control the power supply connected to the cylinder to extend the piston rod of the cylinder. At the same time, receive the electrical signal transmitted by the second pressure detection device and the third pressure detection device, and convert it into a supporting pressure value and a friction value. When the increased value of the supporting pressure value is the same as the preset grinding force, control the current connected to the cylinder to stop the piston cylinder from extending, and combine the increased value of the supporting pressure value with the friction value to calculate the friction coefficient. Then, combine the friction coefficient with the friction value to determine the grinding force of the concrete.

4. The intelligent concrete detection and testing equipment according to claim 3 is characterized by: The processing module is also used to control the current connected to the vent valve by changing the clamping pressure value. When the rotor of the motor rotates, if the clamping pressure value changes by more than a preset clamping pressure change, the current connected to the vent valve is adjusted to allow the vent valve to fill air into the gas channel until the clamping pressure value changes by less than a preset clamping pressure change, thereby controlling the vent valve to close.

5. The intelligent concrete detection and testing equipment according to claim 4 is characterized in that: The processing module is used to control the current connected to the cylinder to shrink the piston rod of the cylinder to the shortest, disconnect the power supply connected to the motor, and issue a prompt of concrete damage when the change amplitude of the clamping pressure value and the friction force value exceeds the preset maximum change value within the preset shortest change time.

6. The intelligent concrete detection and testing equipment according to claim 5 is characterized by: The processing module is used to determine whether the change amplitude of the friction force value is greater than the maximum preset maximum stable amplitude when the change amplitude of the clamping pressure value is smaller than the preset clamping pressure change and the current connected to the motor is stable. If it is greater, the current connected to the cylinder is controlled to shrink the cylinder piston rod to the shortest, and determine whether the change amplitude of the supporting pressure value is greater than the preset grinding wheel stable change amplitude. If it is greater, a prompt of grinding wheel instability is issued; if it is less, a prompt of piston rod instability is issued.

7. A method for intelligent detection and testing of concrete, characterized in that: The intelligent concrete detection and testing equipment described in claim 6 is used, comprising the following steps: S10: Place the test piece on the placement table, fit and fix the bottom plate and the dark box, and connect the concrete intelligent detection and testing equipment to the power supply; S20: the processing module closes the relay between the vent valve and the power supply, and the vent valve fills air into the gas channel. When the clamping pressure value detected by the first pressure detection device is greater than the preset minimum clamping pressure, the relay between the vent valve and the power supply is disconnected, and the vent valve stops filling air into the gas channel. S30: The processing module closes the relay between the motor and the power supply to stabilize the rotor speed of the motor at 600-1000 r / min, closes the relay between the cylinder and the power supply to extend the piston rod of the cylinder until the support pressure value detected by the second pressure detection device increases by 10-20N, disconnects the relay between the cylinder and the power supply, and calculates the friction coefficient through the increase in the support pressure value and the friction value detected by the third pressure detection device; S40: After the third pressure detection device detects the friction value, it counts down the preset friction detection time, calculates the grinding force according to the friction value and friction coefficient detected by the third pressure detection device, and stabilizes the grinding force at 10-20N by controlling the current connected to the cylinder; at the same time, it uses the judgment relay to close to see whether the optocoupler sensor detects a spark, and disconnects the power supply connected to the intelligent concrete detection and testing equipment after the spark is closed.

8. The intelligent concrete detection and testing method according to claim 7 is characterized by: After powering off, the following steps are also included: S51: Separate the dark box and the bottom plate, and record the relative position information of the test piece and the placement table; S52: remove the test piece, measure the diameter D of the indentation left by the alloy ball on the surface of the test piece, calculate the indentation depth h according to the indentation diameter D and the radius d of the alloy ball, and calculate the indentation area A according to the indentation diameter D and the indentation depth h; S53: determining the clamping rod corresponding to each indentation according to the relative position information and the relative position information between the placement table and the clamping rod, and calculating the Brinell hardness HBW of the surface of the specimen using the last stable clamping pressure f of the clamping rod and the indentation area A; S54: Analyze the uniformity of hardness distribution on the specimen surface based on multiple Brinell hardness values ​​HBW.

9. The intelligent concrete detection and testing method according to claim 8, characterized in that: Before calculating the hardness, exclude incomplete or overlapping indentations. When determining the clamping pressure f, exclude indentations corresponding to the clamping pressure f with insufficient stabilization time.

10. A concrete intelligent detection and testing system, characterized in that: Any one of the intelligent concrete detection and testing equipment in claims 1-6 or any one of the intelligent concrete detection and testing methods in claims 7-9 is used.

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