Vibration compaction simulation device and test method thereof

Abstract

The invention belongs to the technical field of vibratory rollers, and particularly relates to a vibratory compaction simulation device and a test method thereof. The vibration compaction simulation device comprises a frame, a vibration wheel simulation assembly, a filling body rigidity simulation assembly and a sensor assembly, the vibration wheel simulation assembly comprises a mounting plate, a vibration motor and a pressure head, the mounting plate is slidably connected with the frame, and the vibration motor and the pressure head are both arranged on the mounting plate; the filling body rigidity simulation assembly comprises a container part, an adapter plate and an elastic part, the adapter plate is detachably connected with the container part, and the elastic part is arranged on the adapter plate; the sensor assembly comprises a position sensor and an acceleration sensor. The position sensor is used for detecting the position of an eccentric block in the vibration motor. The acceleration sensor is used for detecting the acceleration response of the vibration wheel simulation assembly. On the premise of not depending on the real object of the vibratory roller, the design of a roadbed / pavement compaction quality detection algorithm, the development of software and the like can be carried out, so that the online monitoring of the roadbed / pavement compaction state is realized.

Description

Technical Field

[0001] The invention relates to the technical field of vibratory rollers, and in particular to a vibration compaction simulation device and a test method thereof. Background Art

[0002] As a road construction machine, vibratory rollers are widely used in filling and compaction operations of large-scale projects such as high-grade highways, railways, airport runways, dams, and stadiums. Their technical level will directly determine the quality of roadbed formation and have an impact on the long-term safe operation of highways, railways and other projects. For a long time, in the process of using vibratory rollers to carry out roadbed / pavement engineering compaction operations, vibratory roller construction and roadbed / pavement compaction quality inspection have been carried out in series as two separate processes, which not only delays the effective construction time, but also restricts the optimization and improvement of the roller compaction process. Summary of the invention

[0003] The purpose of the present invention is to provide a vibration compaction simulation device and a test method thereof, which can carry out the design of roadbed / pavement compaction quality detection algorithm and software development without relying on a physical vibratory roller, so as to realize online monitoring of the roadbed / pavement compaction status.

[0004] To achieve this object, the present invention adopts the following technical solutions:

[0005] Vibration compaction simulation device, comprising:

[0006] frame;

[0007] A vibration wheel simulation component, comprising a mounting plate, a vibration motor and a pressure head, wherein the mounting plate is slidably connected to the frame in an up-and-down direction, the vibration motor is arranged at the upper end of the mounting plate, and the pressure head is arranged at the lower end of the mounting plate;

[0008] A compact stiffness simulation component, comprising a container, an adapter plate and an elastic member, wherein the container is arranged in the frame and below the pressure head, the container has a receiving cavity, the adapter plate is detachably connected to the container, and the adapter plate can cover the opening of the receiving cavity, and the elastic member is arranged on the adapter plate;

[0009] The sensor assembly includes a position sensor and an acceleration sensor. The position sensor is arranged at the upper end of the mounting plate, and the position sensor is used to detect the position of the eccentric block in the vibration motor; the acceleration sensor is arranged at the lower end of the mounting plate, and the acceleration sensor is used to detect the acceleration response of the vibration wheel simulation assembly.

[0010] As a preferred technical solution of the vibration compaction simulation device, a slide rail is arranged on the frame, a slider is slidably arranged on the slide rail, and the slider is connected to the mounting plate.

[0011] As a preferred technical solution of the vibration compaction simulation device, the vibration wheel simulation component also includes a counterweight block, which is arranged on the mounting plate and is used to adjust the overall parametric mass of the vibration wheel simulation component.

[0012] As a preferred technical solution of the vibration compaction simulation device, a first connecting hole is provided on the adapter plate, and a second connecting hole is provided on the container member, and a fastener can connect the adapter plate to the container member through the first connecting hole and the second connecting hole.

[0013] As an optimal technical solution for the vibration compaction simulation device, a first reserved connecting hole is provided on the mounting plate, and a second reserved connecting hole is provided on the container member, and a fastener can connect the mounting plate to the container member through the first reserved connecting hole and the second reserved connecting hole.

[0014] As a preferred technical solution of the vibration compaction simulation device, the second reserved connection hole and the second connection hole are the same hole.

[0015] As a preferred technical solution of the vibration compaction simulation device, a base is arranged in the frame, and the container is arranged on the base.

[0016] As a preferred technical solution of the vibration compaction simulation device, legs are provided at the bottom of the frame, and the height of the legs can be adjusted.

[0017] As a preferred technical solution of the vibration compaction simulation device, the sensor assembly further includes a force sensor, which is arranged on the elastic member and is used to detect the contact force between the pressure head and the elastic member.

[0018] The test method of the vibration compaction simulation device is applied to the vibration compaction simulation device as described in any of the above schemes, comprising:

[0019] Select test subjects;

[0020] Start the vibration motor;

[0021] Acquire a detection signal of a position sensor, and obtain excitation of a vibration motor according to the detection signal of the position sensor;

[0022] A dynamic model is established based on the excitation of the vibration motor, the known parameters of the vibration wheel simulation component, and the stiffness of the compact simulation component as the quantity to be identified;

[0023] Predict the motion state of the vibration wheel simulation component based on the dynamic model;

[0024] Acquire a detection signal of the acceleration sensor, and obtain the actual motion state of the vibration wheel simulation component according to the detection signal of the acceleration sensor;

[0025] According to the actual motion state of the vibration wheel simulation component, the stiffness parameters are adjusted to correct the predicted motion state, so as to reduce the prediction error and realize stiffness identification.

[0026] Beneficial effects of the present invention:

[0027] The present invention provides a vibration compaction simulation device that can simulate the compaction operation of a vibratory roller to carry out a roadbed / pavement compaction quality detection test. When using the vibration compaction simulation device provided by the present invention to conduct a test, the adapter plate can be installed on the container member, and the elastic member can be used as the test object. The adapter plate can also be removed from the container member, and the filling body can be directly filled in the accommodating cavity of the container member, and the filling body can be used as the test object. Before the test, the test object (elastic member or filling body) is first selected, and then the vibration motor drives the vibration wheel simulation assembly to move back and forth along the upper and lower directions of the frame as a whole, so that the pressure head acts on the test object to simulate the process of compaction of the roadbed / pavement by the vibratory roller. During the test, the position sensor and the acceleration sensor collect signals in real time to provide a basis for the design of the roadbed / pavement compaction quality detection algorithm, the development of software, and the joint debugging and testing of the device. The vibration compaction simulation device provided by the present invention can carry out the design of roadbed / pavement compaction quality detection algorithm, software development and joint debugging and testing of the device without relying on the actual vibratory roller, so as to realize online monitoring of the roadbed / pavement compaction status.

[0028] The present invention also provides a test method for a vibration compaction simulation device, which can realize stiffness identification, thereby evaluating the compaction state, and further realizing online monitoring of the compaction state of the roadbed / pavement. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 is a front view of a vibration compaction simulation device provided by an embodiment of the present invention;

[0030] Figure 2 is a side view of a vibration compaction simulation device provided by an embodiment of the present invention;

[0031] Figure 3 is a front view of a vibration wheel simulation assembly involved in an embodiment of the present invention;

[0032] Figure 4 is a top view of a vibration wheel simulation assembly involved in an embodiment of the present invention;

[0033] Figure 5is a side view of a vibration wheel simulation assembly involved in an embodiment of the present invention;

[0034] Figure 6 is a front view of a compacted body stiffness simulation assembly involved in an embodiment of the present invention;

[0035] Figure 7 is a front view of a frame involved in an embodiment of the present invention;

[0036] Figure 8 is a side view of a frame involved in an embodiment of the present invention;

[0037] Fig. 9 4 is a top view of a frame involved in an embodiment of the present invention.

[0038] In the figure:

[0039] 10. Frame; 11. Controller mounting plate; 12. Base; 20. Vibration wheel simulation component; 21. Mounting plate; 22. Vibration motor; 23. Pressure head; 24. Counterweight; 30. Compacted body stiffness simulation component; 31. Container component; 32. Adapter plate; 33. Elastic component; 41. Slide rail; 42. Slider; 51. Position sensor; 52. Acceleration sensor; 53. Force sensor. DETAILED DESCRIPTION

[0040] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only parts related to the present invention, rather than all structures, are shown in the accompanying drawings.

[0041] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0042] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0043] In the description of this embodiment, the terms "upper", "lower", "right", etc., directions or positional relationships are based on the directions or positional relationships shown in the drawings, and are only for the convenience of description and simplification of operation, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0044] like Figures 1 to 9 As shown, the present invention provides a vibration compaction simulation device, including a frame 10, a vibration wheel simulation component 20, a compacted body stiffness simulation component 30 and a sensor component, wherein the vibration wheel simulation component 20 includes a mounting plate 21, a vibration motor 22 and a pressure head 23, the mounting plate 21 is slidably connected to the frame 10 in the up-down direction, the vibration motor 22 is arranged at the upper end of the mounting plate 21, and the vibration motor 22 is used to simulate the rotating eccentric mass inside the vibration wheel of the vibratory roller, the pressure head 23 is arranged at the lower end of the mounting plate 21, and the pressure head 23 is used to simulate the vibration wheel of the vibratory roller; the compacted body stiffness simulation component 30 includes a container 31, a switching element 32, and a pressure head 23. The plate 32 and the elastic member 33, the container member 31 is arranged on the frame 10 and is located below the pressure head 23, the container member 31 has a accommodating cavity, the adapter plate 32 is detachably connected to the container member 31, and the adapter plate 32 can cover the opening of the accommodating cavity, and the elastic member 33 is arranged on the adapter plate 32; the sensor assembly includes a position sensor 51 and an acceleration sensor 52, the position sensor 51 is arranged at the upper end of the mounting plate 21, and the position sensor 51 is used to detect the position of the eccentric block in the vibration motor 22; the acceleration sensor 52 is arranged at the lower end of the mounting plate 21, and the acceleration sensor 52 is used to detect the acceleration response of the vibration wheel simulation assembly 20.

[0045] The vibration compaction simulation device provided by the present invention can simulate the compaction operation of a vibratory roller to carry out a roadbed / pavement compaction quality detection test. When using the vibration compaction simulation device provided by the present invention to conduct a test, the adapter plate 32 can be installed on the container member 31, and the elastic member 33 can be used as a test object. The adapter plate 32 can also be removed from the container member 31, and the filling body can be directly filled in the accommodating cavity of the container member 31, and the filling body can be used as a test object. Before the test, the test object (elastic member 33 or filling body) is selected first, and then the vibration motor 22 drives the vibration wheel simulation component 20 to move back and forth along the up and down directions of the frame 10 as a whole, so that the pressure head 23 acts on the test object to simulate the process of compaction of the roadbed / pavement by the vibratory roller. During the test, the position sensor 51 and the acceleration sensor 52 perform real-time signal acquisition to provide a basis for the design of the roadbed / pavement compaction quality detection algorithm, the development of software, and the joint debugging and testing of the device. The vibration compaction simulation device provided by the present invention can carry out the design of roadbed / pavement compaction quality detection algorithm, software development, and joint debugging and testing of the device without relying on the actual vibratory roller, so as to realize online monitoring of the roadbed / pavement compaction status.

[0046] Further, refer to Figure 4 The vibration wheel simulation component 20 also includes a counterweight block 24, which is arranged on the mounting plate 21. The counterweight block 24 is used to adjust the overall vibration mass of the vibration wheel simulation component 20, so that the test adjustment is more flexible.

[0047] In this embodiment, refer to Figure 1 and Figure 7 The frame 10 is provided with a slide rail 41 extending in the up-down direction, and a slider 42 is slidably provided on the slide rail 41, and the slider 42 is connected to the mounting plate 21. The mounting plate 21 can slide under the guidance of the slider 42 and the slide rail 41, so that the sliding of the mounting plate 21 is smoother and more stable. Optionally, the slide rail 41 and the frame 10 can be connected by bolts; or the slide rail 41 and the frame 10 can also be connected by welding.

[0048] In this embodiment, the adapter plate 32 is provided with a first connection hole, and the container member 31 is provided with a second connection hole. The fastener can connect the adapter plate 32 to the container member 31 through the first connection hole and the second connection hole, which can ensure the stability of the adapter plate 32 after being connected to the container member 31, and can also realize the removal of the adapter plate 32 from the container member 31. Optionally, the fastener is a bolt or a screw.

[0049] In this embodiment, a first reserved connection hole is provided on the mounting plate 21, and a second reserved connection hole is provided on the container member 31, and the fastener can connect the mounting plate 21 with the container member 31 through the first reserved connection hole and the second reserved connection hole. When the vibration compaction simulation device needs to be transported, the elastic member 33 and the adapter plate 32 can be connected and transported separately, and the mounting plate 21 can be connected with the container member 31 through the fastener through the first reserved hole on the mounting plate 21 and the second reserved hole on the container member 31, so as to fix the vibration wheel simulation component 20 and prevent the vibration wheel simulation component 20 from sliding along the up and down direction of the frame 10 during transportation and colliding. Optionally, the second reserved connection hole can directly adopt the second connection hole, and the processing technology of the container member 31 is simpler, and the structure of the container member 31 is more concise.

[0050] In this embodiment, refer to Figure 1 and Figure 2 , and combined with Fig. 9 A base 12 is provided in the frame 10, and the container 31 is provided on the base 12. By providing the base 12, the center of gravity of the vibration compaction simulation device can be lowered, making the vibration compaction simulation device more stable.

[0051] In this embodiment, refer to Figure 1 and Figure 2 , and combined with Figure 7 and Figure 8 , a support leg is provided at the bottom of the frame 10. Further, the height of the support leg can be adjusted to adjust the overall height of the vibration compaction simulation device.

[0052] Specifically, the position sensor 51 can detect the moving position of the eccentric block in the vibration motor 22. Optionally, the position sensor 51 is a photoelectric sensor, and the eccentric block of the vibration motor 22 is provided with a reflective strip that cooperates with the photoelectric sensor. The photoelectric sensor is used to monitor the sweeping moment of the eccentric block in the vibration motor 22. By processing the square wave signal output by the photoelectric sensor, the moving position of the eccentric block can be obtained. The vibration compaction simulation device also includes a vibration motor 22 controller. The excitation size provided by the vibration motor 22 can be obtained by the moving position of the eccentric block, combined with the set frequency of the vibration motor 22 controller and the known size parameters of the eccentric block. In this embodiment, refer to Figure 2 and Figure 8 A controller mounting plate 11 is disposed on the frame 10 , and a controller of the vibration motor 22 is disposed on the controller mounting plate 11 .

[0053] Further, refer to Figure 1 and Figure 2 , and combined with Figure 6The sensor assembly further includes a force sensor 53, which is disposed on the elastic member 33 and is used to detect the contact force between the pressure head 23 and the elastic member 33. When the elastic member 33 is used as the test object, the detection result of the force sensor 53 can be used to correct the calculation result of the position excitation magnitude, so that the test result is more accurate.

[0054] Furthermore, the vibration compaction simulation device also includes a power supply component, a data acquisition card, a computer and supporting software. The power supply component is used to supply power to the sensor component, the vibration motor 22 controller and the vibration motor 22; the sensor component is used to collect the working signal of the vibration compaction simulation device; the vibration motor 22 controller is used to adjust the frequency of the vibration motor 22; the data acquisition card is used to collect the detection signal of the sensor component, and is used to convert the analog signal into a digital signal and store and display it, and digitally communicate the data with the computer; the computer and supporting software are used to calculate and analyze the data and output the results.

[0055] The embodiment of the present invention also provides a test method of a vibration compaction simulation device, comprising:

[0056] Select test subjects;

[0057] Start the vibration motor 22;

[0058] Acquire a detection signal of the position sensor 51, and obtain excitation of the vibration motor 22 according to the detection signal of the position sensor 51;

[0059] A dynamic model is established based on the excitation of the vibration motor 22, the known parameters of the vibration wheel simulation assembly 20, and the stiffness of the compact simulation assembly as the quantity to be identified;

[0060] Predicting the motion state of the vibration wheel simulation component 20 according to the dynamics model;

[0061] Acquire a detection signal of the acceleration sensor 52, and obtain the actual motion state of the vibration wheel simulation component 20 according to the detection signal of the acceleration sensor 52;

[0062] The stiffness parameters are adjusted according to the actual motion state of the vibration wheel simulation component 20 to correct the predicted motion state, so as to reduce the prediction error and realize stiffness identification.

[0063] Through the test method of the above-mentioned vibration compaction simulation device, stiffness identification can be achieved, thereby evaluating the compaction state, and further realizing online monitoring of the roadbed / pavement compaction state.

[0064] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. For those skilled in the art, various obvious changes, readjustments and substitutions can be made without departing from the protection scope of the present invention. It is not necessary and impossible to list all the embodiments here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. A vibration compaction simulation device, characterized in that: include: Frame (10); A vibration wheel simulation component (20), comprising a mounting plate (21), a vibration motor (22) and a pressure head (23), wherein the mounting plate (21) is slidably connected to the frame (10) in an up-down direction, the vibration motor (22) is arranged at the upper end of the mounting plate (21), and the pressure head (23) is arranged at the lower end of the mounting plate (21); A compacted body stiffness simulation component (30), comprising a container member (31), an adapter plate (32) and an elastic member (33), wherein the container member (31) is arranged in the frame (10) and is located below the pressure head (23), the container member (31) has a receiving cavity, the adapter plate (32) is detachably connected to the container member (31), and the adapter plate (32) can cover the opening of the receiving cavity, and the elastic member (33) is arranged on the adapter plate (32); The sensor assembly comprises a position sensor (51) and an acceleration sensor (52), wherein the position sensor (51) is arranged at the upper end of the mounting plate (21), and the position sensor (51) is used to detect the position of an eccentric block in the vibration motor (22); and the acceleration sensor (52) is arranged at the lower end of the mounting plate (21), and the acceleration sensor (52) is used to detect the acceleration response of the vibration wheel simulation assembly (20).

2. The vibration compaction simulation device according to claim 1, characterized in that: The frame (10) is provided with a slide rail (41), a slider (42) is slidably provided on the slide rail (41), and the slider (42) is connected to the mounting plate (21).

3. The vibration compaction simulation device according to claim 1, characterized in that: The vibration wheel simulation component (20) further comprises a counterweight (24), wherein the counterweight (24) is arranged on the mounting plate (21), and the counterweight (24) is used to adjust the overall parametric mass of the vibration wheel simulation component (20).

4. The vibration compaction simulation device according to claim 1, characterized in that: The adapter plate (32) is provided with a first connection hole, and the container member (31) is provided with a second connection hole, and a fastener can connect the adapter plate (32) and the container member (31) through the first connection hole and the second connection hole.

5. The vibration compaction simulation device according to claim 4, characterized in that: The mounting plate (21) is provided with a first reserved connection hole, and the container member (31) is provided with a second reserved connection hole, and a fastener can connect the mounting plate (21) and the container member (31) through the first reserved connection hole and the second reserved connection hole.

6. The vibration compaction simulation device according to claim 5, characterized in that: The second reserved connection hole and the second connection hole are the same hole.

7. The vibration compaction simulation device according to claim 1, characterized in that: A base (12) is arranged inside the frame (10), and the container (31) is arranged on the base (12).

8. The vibration compaction simulation device according to claim 1, characterized in that: The frame (10) is provided with supporting legs at the bottom, and the height of the supporting legs can be adjusted.

9. The vibration compaction simulation device according to claim 1, characterized in that: The sensor assembly further comprises a force sensor (53), wherein the force sensor (53) is arranged on the elastic member (33), and the force sensor (53) is used to detect the contact force between the pressure head (23) and the elastic member (33).

10. A test method for a vibration compaction simulation device, characterized in that: The vibration compaction simulation device used in any one of claims 1 to 9 comprises: Select test subjects; Starting the vibration motor (22); Acquiring a detection signal from a position sensor (51), and obtaining excitation for a vibration motor (22) based on the detection signal from the position sensor (51); A dynamic model is established based on the excitation of the vibration motor (22), known parameters of the vibration wheel simulation component (20), and the stiffness of the compact simulation component as a quantity to be identified; Predicting the motion state of the vibration wheel simulation component (20) according to the dynamics model; Acquiring a detection signal from an acceleration sensor (52), and obtaining the actual motion state of the vibration wheel simulation component (20) based on the detection signal from the acceleration sensor (52); The stiffness parameter is adjusted according to the actual motion state of the vibration wheel simulation component (20) to correct the predicted motion state, thereby reducing the prediction error and achieving stiffness identification.

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