A concrete dynamic modulus of elasticity testing system and method

Abstract

The application discloses a concrete dynamic elastic modulus testing system and testing method. The system comprises a support main body, a clamping mechanical arm, an ultrasonic generator, a pressure sensor, a measuring mechanical arm, a receiving probe, an image recognition assembly, an outline measurement assembly and a control unit. The image recognition assembly identifies the position of a test piece. The control unit drives the clamping mechanical arm to clamp the test piece on the pressure sensor to measure the weight of the test piece. The ultrasonic generator is arranged on the support main body and applies mechanical vibration to the test piece. The measuring mechanical arm is arranged on the support main body, and the receiving probe is arranged on the measuring mechanical arm. The measuring mechanical arm presses the receiving probe on the top of the test piece. The outline measurement assembly is arranged on the support main body. The method comprises test piece transfer, data measurement, frequency measurement and test piece retrieval. The system can automatically measure the outline size, weight and dynamic elastic modulus of the test piece, and reduces the problems of low efficiency, large error and complicated operation caused by manual measurement.

Description

Technical Field

[0001] This invention relates to the field of concrete dynamic elastic modulus testing equipment, specifically to a concrete dynamic elastic modulus testing system and testing method. Background Technology

[0002] The dynamic elastic modulus of concrete is a key indicator for evaluating the mechanical properties and durability of concrete, and it is widely used in engineering quality testing and scientific research experiments. Currently, the mainstream testing method is the resonance method, which relies on ultrasonic excitation of the specimen to generate resonance, and then calculates the dynamic elastic modulus by measuring the resonance frequency.

[0003] Existing testing equipment and methods generally suffer from the following technical problems: specimen handling and positioning rely on manual labor, which is cumbersome, inefficient, and labor-intensive. Placement deviations can easily alter the support boundary conditions, leading to distortion in resonant frequency measurements. Specimen quality and dimensions require manual measurement and recording, resulting in fragmented processes, data errors, and an inability to form a closed-loop automated testing system with frequency detection. The lack of standardized support and positioning mechanisms makes it difficult to stably maintain "approximately free boundary" conditions, causing specimens to slip and sway during resonance, further increasing measurement errors.

[0004] The aforementioned problems result in insufficient accuracy and stability of test results, low testing efficiency, high labor costs, and an inability to meet the needs of large-scale, high-precision, and automated testing. Summary of the Invention

[0005] The purpose of this invention is to provide a testing system and method for the dynamic elastic modulus of concrete. This system and method solve the technical problems of low efficiency and high labor intensity of manual specimen handling, large amount of manual measurement and calculation and easy data error, and insufficient stability of specimen measurement in the prior art.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: A concrete dynamic elastic modulus testing system includes a support body, a gripping robotic arm, an ultrasonic generator, a pressure sensor, a measuring robotic arm, a receiving probe, an image recognition component, a shape measurement component, and a control unit. The image recognition component identifies the position of a specimen placed on the support body and feeds it back to the control unit. The control unit issues a command to drive the gripping robotic arm to grip the specimen and place it on the pressure sensor. The pressure sensor measures the weight of the specimen and feeds it back to the control unit. The ultrasonic generator is mounted on the support body and contacts the bottom of the specimen to apply mechanical vibration to it. The measuring robotic arm is mounted on the support body, and the receiving probe is mounted on the measuring robotic arm, which presses the receiving probe against the top of the specimen. The shape measurement component is mounted on the support body and measures the external dimensions of the specimen, feeding them back to the control unit.

[0007] Preferably, the shape measurement component includes a transverse array laser sensor and a longitudinal array laser sensor. The transverse array laser sensor is disposed above the support body and is used to measure the length and width of the specimen. The longitudinal array laser sensor is disposed on the side of the support body and is used to measure the height of the specimen.

[0008] Preferably, a movable component is provided above and to the side of the support body, the movable component being used to drive the horizontal array laser sensor to move horizontally or the vertical array laser sensor to move vertically.

[0009] Preferably, the movable component includes a slider, a support rod, a drive motor, a rack, and a gear. A slider is fixedly disposed at each end of the support rod, and the slider is slidably mounted on the support body. The rack is fixedly disposed on the support body. The drive motor is fixedly disposed at one end of the support rod. The gear is fixedly disposed at the output end of the drive motor, and the gear meshes with the rack. The horizontal array laser sensor or the vertical array laser sensor is disposed on the support rod.

[0010] Preferably, the support body includes a support plate and a support frame, with the support frame fixedly disposed above the support plate.

[0011] Preferably, a positioning element is provided on the support plate to position the specimen.

[0012] Preferably, the image recognition component is a 3D industrial camera.

[0013] Preferably, the control unit is a direct-reading data processing and display integrated machine. The direct-reading data processing and display integrated machine is used to process the information measured by the pressure sensor, receiving probe, image recognition component and shape measurement component, drive the gripping robotic arm, ultrasonic generator and measuring robotic arm to perform specified actions, and display the measurement data.

[0014] Preferably, the contact point between the receiving probe and the specimen is 5 mm from the edge of the specimen.

[0015] A test method for a concrete dynamic elastic modulus testing system, the test method comprising the following steps: Step 1, specimen transfer: The image recognition component identifies the position of the specimen placed on one side of the support body, controls the gripping robotic arm to grip the specimen and transfer it to the designated position on the pressure sensor; Step two, data measurement: the weight of the specimen is measured using a pressure sensor, and the length, width, and height of the specimen are measured using a shape measurement component; Step 3, frequency measurement: The ultrasonic generator starts to generate ultrasonic waves, and the receiving probe transmits the received ultrasonic frequency data to the control unit to automatically identify the resonant frequency. Step 4: Retrieve the specimen. After measurement, control the gripping robotic arm to grip the specimen and transfer it to the support body.

[0016] In this invention, a 3D industrial camera recognition and a gripping robotic arm work together to automatically complete the gripping, transfer and positioning of the specimen without human intervention. The positioning component ensures the consistency of the specimen's posture and position, strictly guarantees the stability of the resonance boundary conditions, and avoids frequency distortion caused by placement deviations from the source.

[0017] The system integrates automatic measurement of quality, size, and frequency, ensuring error-free data closed-loop control. Pressure sensors automatically weigh the data, while horizontal / vertical array laser sensors, along with movable components, automatically measure length, width, and height. All data is uploaded to the control unit in real time, eliminating the need for manual recording and calculation, thus preventing human error in readings and data entry. This makes the testing process more efficient and the data more reliable.

[0018] The excitation-receiver automatic centering and constant force coupling result in stable resonance signals and significantly improved measurement accuracy. The ultrasonic generator is placed below the specimen, and the receiving probe is automatically pressed into the designated position on the top surface by the measuring robotic arm. The coupling pressure is precisely controlled by the robotic arm, ensuring good acoustic coupling, no air bubbles or loosening, and without creating additional constraints. The resonance signal is clear and stable, and the frequency identification accuracy is greatly improved.

[0019] Standardized support and stability constraints ensure that the specimen does not slip or wobble during resonance. The support body and positioning components together provide stable and consistent support conditions, and the near-free boundary meets the specifications. The specimen maintains a fixed posture during resonance without lateral displacement or abnormal vibration, ensuring a safe testing process and good repeatability of results.

[0020] The entire process is intelligently and collaboratively controlled, and one-click completion of fully automatic testing is achieved. The direct-reading data processing and display all-in-one machine uniformly schedules image recognition, mechanical transfer, weighing, dimension measurement, frequency sweep excitation, frequency reception and result calculation, realizing full automation of the "material feeding - measurement - calculation - output" process. The system has a high degree of integration and is easy to operate, which greatly improves the testing efficiency, reduces labor costs, and is suitable for batch, continuous and standardized testing scenarios. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the measurement state of the present invention; In the diagram: 1. Support body; 2. Gripping robotic arm; 3. Ultrasonic generator; 4. Pressure sensor; 5. Measuring robotic arm; 6. Receiving probe; 7. Image recognition component; 8. Shape measurement component; 9. Control unit; 10. Specimen; 11. Movable component; 12. Support plate; 13. Support frame; 14. Positioning component; 80. Horizontal array laser sensor; 81. Vertical array laser sensor; 110. Slider; 111. Support rod; 112. Drive motor; 113. Rack; 114. Gear. Detailed Implementation

[0022] The present invention will be further described below with reference to the accompanying drawings: like Figure 1 and Figure 2 The concrete dynamic elastic modulus testing system shown includes a support body 1, a gripping robotic arm 2, an ultrasonic generator 3, a pressure sensor 4, a measuring robotic arm 5, a receiving probe 6, an image recognition component 7, a shape measurement component 8, and a control unit 9. The support body 1 includes a support plate 12 and a support frame 13, with the support frame 13 fixedly mounted above the support plate 12. The support plate 12 is fixedly mounted on a platform or the ground to provide a horizontally stable working platform. The support frame 13 is used to mount the measuring instruments.

[0023] The control unit 9 is a direct-reading data processing and display integrated machine. This machine processes information measured by the pressure sensor 4, receiving probe 6, image recognition component 7, and shape measurement component 8, drives the gripping robotic arm 2, ultrasonic generator 3, and measuring robotic arm 5 to perform specified actions, and displays the measurement data. The control unit 9 is electrically connected to the pressure sensor 4, receiving probe 6, image recognition component 7, shape measurement component 8, gripping robotic arm 2, ultrasonic generator 3, and measuring robotic arm 5 via cables, all of which are housed within a wiring harness. The direct-reading data processing and display integrated machine combines the data processing module and the digital display module, receiving data on the mass, dimensions, and resonant frequency of the specimen 10, automatically calculating the dynamic elastic modulus of the specimen 10, and displaying the results on the monitor.

[0024] Image recognition component 7 is mounted on support frame 13. Image recognition component 7 is used to identify the position of specimen 10 placed on support body 1 and transmit the detected position information to control unit 9. In this embodiment, image recognition component 7 is a 3D industrial camera.

[0025] The control unit 9 issues a command based on the position information detected by the image recognition component 7, driving the gripping robotic arm 2 to grip the specimen 10 and place it on the pressure sensor 4. The gripping robotic arm 2 then releases the specimen 10 and returns to its initial position. The pressure sensor 4 is used to measure the weight of the specimen 10 and transmits the measured weight information to the control unit 9.

[0026] In a preferred embodiment, a positioning element 14 is provided on the support plate 12. The positioning element 14 is used to position the specimen 10. The positioning element 14 has three limiting points, all of which are located at the bottom of the specimen 10.

[0027] The ultrasonic generator 3 is fixedly mounted on the support body 1. The top of the ultrasonic generator 3 is in contact with the bottom of the specimen 10. When the ultrasonic generator 3 is powered on, it is used to apply mechanical vibration to the specimen 10.

[0028] The measuring robotic arm 5 is fixedly mounted on the supporting body 1, and the receiving probe 6 is fixedly mounted on the measuring robotic arm 5. After the specimen 10 is placed in position and its weight, length, width, and height are measured, the measuring robotic arm 5 presses the receiving probe 6 onto the top of the specimen 10. Specifically, the contact point between the receiving probe 6 and the specimen 10 is 5 mm from the edge of the specimen 10.

[0029] An external dimension measurement component 8 is mounted on the support body 1 and is used to measure the external dimensions of the specimen 10 and transmit the measurements back to the control unit 9. The external dimension measurement component 8 includes a transverse array laser sensor 80 and a longitudinal array laser sensor 81. The transverse array laser sensor 80 is positioned above the support frame 13 and is used to measure the length and width of the specimen 10. The longitudinal array laser sensor 81 is positioned on the side of the support frame 13 and is used to measure the height of the specimen 10.

[0030] In a preferred embodiment, a movable component 11 is provided above and to the side of the support body 1. The movable component 11 is used to drive the horizontal array laser sensor 80 to move horizontally or the vertical array laser sensor 81 to move vertically.

[0031] Specifically, the movable component 11 includes a slider 110, a support rod 111, a drive motor 112, a rack 113, and a gear 114. A slider 110 is fixedly mounted at each end of the support rod 111, and the sliders 110 are slidably mounted on the support body 1. A slide rail can be provided on the support body 1, and the sliders 110 are slidably mounted on the slide rail. The rack 113 is fixedly mounted on the support body 1. The drive motor 112 is fixedly mounted at one end of the support rod 111, and the gear 114 is fixedly mounted at the output end of the drive motor 112. The gear 114 meshes with the rack 113. When the drive motor 112 is energized and rotates, the support rod 111 moves laterally or vertically through the meshing of the gear 114 and rack 113. A horizontal array laser sensor 80 and a vertical array laser sensor 81 are mounted on their respective support rods 111. The controller of the drive motor 112 is electrically connected to the control unit 9. The control unit 9 can control the rotation, direction, and stop of the drive motor 112.

[0032] A test method for a concrete dynamic elastic modulus testing system, the test method comprising the following steps: Step 1: Transfer of specimen 10. The tester first places the specimen 10 to be measured on one side above the support plate 12. The image recognition component 7 identifies the position of the specimen 10 placed on one side of the support body 1. The tester then controls the gripping robotic arm 2 to grip the specimen 10 and transfer it to the designated position on the pressure sensor 4; specifically, it is placed on the positioning component 14.

[0033] Step two, data measurement: The weight of specimen 10 is measured using pressure sensor 4, and the length, width, and height of specimen 10 are measured using shape measurement component 8. Pressure sensor 4 is vertically mounted on support plate 12 via an electric push rod. When the weight of specimen 10 needs to be measured, the electric push rod extends, separating specimen 10 from positioning component 14 for accurate weight measurement. After measurement, the electric push rod retracts, separating pressure sensor 4 from specimen 10, and specimen 10 is positioned on positioning component 14. The weight information measured by pressure sensor 4 is transmitted to control unit 9, and the length, width, and height information measured by shape measurement component 8 are also transmitted to control unit 9.

[0034] Step 3, frequency measurement: The top of the ultrasonic generator 3 is in close contact with the bottom of the specimen 10, and sufficient ultrasonic coupling agent is applied to the top of the ultrasonic generator 3. During installation, the specimen 10 presses down on the ultrasonic coupling agent under its own weight, ensuring that the contact area between the ultrasonic generator 3 and the specimen 10 is free of air bubbles and loose. The ultrasonic generator 3 begins to generate ultrasonic waves, and the receiving probe 6 transmits the received ultrasonic frequency data to the control unit 9, which automatically identifies the resonant frequency. Similarly, ultrasonic coupling agent is applied to the end of the receiving probe 6. The measuring robotic arm 5 presses down on the receiving probe 6, expelling air from the contact area between the receiving probe 6 and the specimen 10, ensuring a tight seal between the receiving probe 6 and the specimen 10.

[0035] Step four: Retrieve specimen 10. After measurement, control the gripping robotic arm 2 to grip specimen 10 and transfer it to the support body 1. Await the next operation.

[0036] The above embodiments are merely illustrative of the concept and implementation of the present invention and are not intended to limit it. Under the concept of the present invention, technical solutions without substantial changes are still within the scope of protection.

Claims

1. A system for testing the dynamic elastic modulus of concrete, characterized in that: The device includes a support body (1), a gripping robotic arm (2), an ultrasonic generator (3), a pressure sensor (4), a measuring robotic arm (5), a receiving probe (6), an image recognition component (7), a shape measurement component (8), and a control unit (9). The image recognition component (7) identifies the position of the specimen (10) placed on the support body (1) and feeds it back to the control unit (9). The control unit (9) issues a command to drive the gripping robotic arm (2) to grip the specimen (10) and place it on the pressure sensor (4). The pressure sensor (4) is used to measure the position of the specimen (10). The weight of the specimen (10) is measured and fed back to the control unit (9); the ultrasonic generator (3) is set on the support body (1), and the ultrasonic generator (3) contacts the bottom of the specimen (10) to apply mechanical vibration to the specimen (10); the measuring robot arm (5) is set on the support body (1), and the receiving probe (6) is set on the measuring robot arm (5), and the measuring robot arm (5) presses the receiving probe (6) on the top of the specimen (10); the shape measuring component (8) is set on the support body (1) to measure the shape dimensions of the specimen (10) and feed them back to the control unit (9).

2. The concrete dynamic elastic modulus testing system according to claim 1, characterized in that: The shape measurement component (8) includes a transverse array laser sensor (80) and a longitudinal array laser sensor (81). The transverse array laser sensor (80) is located above the support body (1) and is used to measure the length and width of the specimen (10). The longitudinal array laser sensor (81) is located on the side of the support body (1) and is used to measure the height of the specimen (10).

3. The concrete dynamic elastic modulus testing system according to claim 2, characterized in that: A movable component (11) is provided above and to the side of the support body (1). The movable component (11) is used to drive the horizontal array laser sensor (80) to move horizontally or the vertical array laser sensor (81) to move vertically.

4. The concrete dynamic elastic modulus testing system according to claim 3, characterized in that: The movable component (11) includes a slider (110), a support rod (111), a drive motor (112), a rack (113), and a gear (114). A slider (110) is fixedly installed at each end of the support rod (111). The slider (110) is slidably mounted on the support body (1). The rack (113) is fixedly installed on the support body (1). The drive motor (112) is fixedly installed at one end of the support rod (111). The gear (114) is fixedly installed at the output end of the drive motor (112). The gear (114) meshes with the rack (113). The horizontal array laser sensor (80) or the vertical array laser sensor (81) is installed on the support rod (111).

5. The concrete dynamic elastic modulus testing system according to claim 1 or 4, characterized in that: The supporting body (1) includes a supporting plate (12) and a supporting frame (13), and the supporting frame (13) is fixedly disposed above the supporting plate (12).

6. The concrete dynamic elastic modulus testing system according to claim 5, characterized in that: A positioning element (14) is provided on the support plate (12), and the positioning element (14) is used to position the specimen (10) in place.

7. The concrete dynamic elastic modulus testing system according to claim 1, characterized in that: The image recognition component (7) is a 3D industrial camera.

8. The concrete dynamic elastic modulus testing system according to claim 1, characterized in that: The control unit (9) is a direct-reading data processing and display integrated machine. The direct-reading data processing and display integrated machine is used to process the information measured by the pressure sensor (4), the receiving probe (6), the image recognition component (7) and the shape measurement component (8), drive the gripping robotic arm (2), the ultrasonic generator (3) and the measuring robotic arm (5) to perform specified actions, and display the measurement data.

9. The concrete dynamic elastic modulus testing system according to claim 1, characterized in that: The contact point between the receiving probe (6) and the specimen (10) is 5 mm from the edge of the specimen (10).

10. A test method for the concrete dynamic elastic modulus testing system according to any one of claims 1 to 9, characterized in that: The testing method includes the following steps: Step 1: Transfer of specimen (10). The position of specimen (10) placed on one side of the support body (1) is identified by the image recognition component (7). The gripping robot arm (2) is controlled to grip specimen (10) and transfer specimen (10) to the designated position on the pressure sensor (4). Step 2, data measurement: the weight of the specimen (10) is measured by the pressure sensor (4), and the length, width and height of the specimen (10) are measured by the shape measurement component (8); Step 3, frequency measurement: The ultrasonic generator (3) starts to generate ultrasonic waves, and the receiving probe (6) transmits the received ultrasonic frequency data to the control unit (9) to automatically identify the resonant frequency. Step 4: Retrieve the specimen (10). After the measurement is completed, control the gripping robotic arm (2) to grip the specimen (10) and transfer the specimen (10) to the support body (1).

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