Comprehensive test equipment

Abstract

The utility model provides comprehensive testing equipment which is used for testing the dynamic modulus and the damping ratio of a material, a sample container, a vibration excitation device, a load sensor and a displacement sensor are arranged in the comprehensive testing equipment, the sample container is arranged at the bottom of the comprehensive testing equipment, and the vibration excitation device comprises a vibration exciter and a compression assembly. The vibration exciter is arranged at the top of the comprehensive test equipment, and the compression assembly is connected with the vibration exciter, is located above the sample container and moves up and down relative to the test container; the load sensor is in contact with the vibration exciter and is used for measuring the load generated by the vibration exciter, and the displacement sensor is in contact with the compression assembly and is used for measuring the compression amount of the compression assembly. Wherein the sample container is used for placing a to-be-tested material, and the excitation device acts on the to-be-tested material and generates a dynamic load. In the experiment process, the dynamic load signal of the vibration exciter and the compression amount of the compression assembly are collected at the same time, the same to-be-tested material, load data and displacement data can be obtained without repeated experiments, the structure is simple, and practicability is high.

Description

TECHNICAL FIELD

[0001] The utility model relates to road engineering material performance test technical field, especially in kind of comprehensive test equipment. BACKGROUND

[0002] The dynamic modulus and damping ratio of asphalt mixture are important parameters for evaluating its mechanical properties and durability. The dynamic modulus of asphalt mixture is the ratio of stress to strain under the action of dynamic load (such as the vibration load of pavement caused by vehicle driving). Under dynamic loading conditions, the stress and strain of asphalt mixture change with time, and the dynamic modulus reflects the material's ability to resist dynamic deformation, which can predict the performance of pavement in actual traffic environment, such as rutting resistance and fatigue life. The damping ratio of asphalt mixture is a parameter for measuring the energy dissipation characteristics of the material during vibration. When the asphalt mixture is vibrated under external excitation (such as vibration generated by vehicle driving), the vibration energy will be gradually consumed due to the action of internal friction, viscous force and other factors. Damping ratio is an index for quantifying this energy dissipation capacity. In the process of long-term bearing of vehicle repeated load on pavement, the damping performance of asphalt mixture can reduce the accumulation of internal fatigue damage. High damping ratio makes the energy effectively consumed in each vibration process, reducing the stress concentration caused by repeated deformation in the material, thereby prolonging the service life of the pavement. From the perspective of noise reduction, high-damping materials can absorb part of the energy generated by tire-pavement vibration, reducing the energy of the noise source, thereby reducing traffic noise, which is of great significance to improve the environment around the road.

[0003] When obtaining the dynamic modulus and damping ratio of traditional asphalt mixture, repeated loading test and dynamic mechanical analysis method are often used. However, this method has many problems. The required instrument equipment is expensive, the operation process is complex and tedious, which makes the test cost high, and the experience level of the test personnel is very high. Despite this, this method is still the most commonly used test method for testing the dynamic performance of asphalt mixture. There has been a lack of a test device that can accurately measure both dynamic modulus and damping ratio for a long time. This situation seriously restricts the efficiency and accuracy of asphalt mixture performance research. UTILITY MODEL CONTENT

[0004] The technical problem to be solved by the utility model is to overcome the defect that the dynamic modulus and damping ratio of asphalt material cannot be measured simultaneously in the prior art, and repeated experiments and analysis are required, and a comprehensive test device is provided.

[0005] The utility model solves the above technical problems by the following technical scheme:

[0006] The application provides a comprehensive testing device for testing dynamic modulus and damping ratio of materials, which comprises a sample container, an exciting device, a load sensor and a displacement sensor.

[0007] The load sensor is in contact with the exciting device and is used for measuring the load generated by the exciting device, and the displacement sensor is in contact with the compression assembly and is used for measuring the compression amount of the compression assembly.

[0008] In the application, the sample container is used for placing the material to be tested, the exciting device acts on the material to be tested and generates a dynamic load, the compression assembly is connected to the exciting device and can be lifted into the sample container to contact the material to be tested and transmit the stable load generated by the exciting device during the experiment. The load sensor and the displacement sensor are in contact with the exciting device and the compression assembly respectively, and the dynamic load signal of the exciting device and the compression amount of the compression assembly are collected simultaneously during the experiment, so that the load data and the displacement data of the same material to be tested can be obtained without repeated experiments, and the application has simple structure and high practicability.

[0009] Preferably, the comprehensive testing device further comprises a heating device, and the heating device surrounds the sample container.

[0010] In the application, the heating device is arranged to control the temperature of the material to be tested, so that the accuracy of the experimental results is ensured, and the heating device surrounds the sample container, so that the material to be tested in the sample container can be uniformly heated, and the heating efficiency of the experiment is improved.

[0011] Preferably, the sample container has a barrel structure, the heating device has a cylindrical furnace body, the sample container is nested in the heating device, and the heating device is connected to the bottom of the comprehensive testing device.

[0012] And / or, the comprehensive testing device further comprises a base arranged above the base.

[0013] In the scheme, a barrel-shaped sample container is adopted, which has a larger volume and is suitable for the shape of most materials to be tested. A cylindrical furnace body is used as a heating device, which has a simple structure and is suitable for the barrel-shaped sample container. The two are matched with each other to realize uniform heating of the material to be tested and reduce heat loss. The heating device is connected to the bottom and / or base of the equipment. The base provided at the bottom of the equipment can play a role of shock absorption, so as to prevent the experimental data from being inaccurate or the experimental equipment and site from being damaged due to excitation affecting other structures of the equipment during the experiment, improve the safety of the comprehensive test equipment, and prolong the service life of the equipment.

[0014] Preferably, a clamping portion is arranged inside the sample container, and the clamping portion is connected to the inner wall of the sample container.

[0015] The clamping portion comprises a clamping plate and an elastic member, and the clamping plate is elastically connected to the sample container through the elastic member.

[0016] In the scheme, the clamping portion can be used to fix the material to be tested, so that the material to be tested does not deviate or fall off during the experiment, and the influence on other parts or experimental data is avoided. The clamping plate is connected to the sample container through the elastic member, which can be adjusted to adapt to different sizes of the material to be tested, and the stability of the material to be tested during the test can be ensured.

[0017] Preferably, the comprehensive test equipment comprises a plurality of clamping portions, and the plurality of clamping portions are uniformly arranged around the inner wall of the sample container.

[0018] In the scheme, a plurality of clamping portions are arranged, which can fix the material to be tested more stably in the sample container, so as to ensure that the material to be tested does not deviate during excitation, which may cause a large error in experimental data. The plurality of clamping portions are uniformly arranged on the inner wall of the sample container, so that the material to be tested is uniformly stressed, the clamping effect is good, and the reliability of the comprehensive test equipment is improved.

[0019] Preferably, the load sensor and the exciter are connected to the top of the comprehensive test equipment through a connecting seat, and the load sensor is arranged around the exciter.

[0020] In the scheme, the load sensor and the exciter are connected to the top of the comprehensive test equipment through the connecting seat, so as to avoid affecting other structures of the equipment during excitation, which may cause inaccurate experimental data. At the same time, the load sensor is arranged around the exciter, so that the load sensor can accurately collect the load generated during the excitation of the exciter, and the accuracy of the experimental data is improved.

[0021] Preferably, the compression assembly comprises a push rod and a compression mold, the top of the push rod is connected to the exciter, the compression mold is connected to the bottom of the push rod, the push rod can move up and down in the vertical direction to drive the compression mold to move up and down, and the compression mold is aligned with the opening of the sample container in the vertical direction.

[0022] In this scheme, the push rod is connected to the exciter for up and down movement in the vertical direction, and the compression mold is connected to the bottom of the push rod and driven up and down by the push rod. At the same time, the compression mold is aligned with the opening of the sample container, so that the compression mold can extend into the sample container and contact the measured object or apply pressure after being pressed down.

[0023] Preferably, the comprehensive testing device comprises a protective cover connected to the top of the comprehensive testing device, one end of the displacement sensor is connected to the inner wall of the protective cover, and the other end of the displacement sensor is in contact with the push rod.

[0024] In this scheme, the protective cover is provided to protect the load sensor and the displacement sensor, which avoids external interference during the experiment and improves the accuracy of the data and the service life of the sensor. The displacement sensor is directly connected to the protective cover and can stably contact the push rod without other components, which is simple in structure and strong in practicability.

[0025] Preferably, part of the push rod and the compression mold extends out of the protective cover.

[0026] In this scheme, part of the compression assembly can move out of the protective cover, and the arrangement of the protective cover does not affect the cooperation of the excitation device and the sample container.

[0027] Preferably, the comprehensive testing device further comprises a processing system, and the load sensor and the displacement sensor are electrically connected to the processing system.

[0028] A display and a control panel are arranged above the comprehensive testing device, and the display and the control panel are electrically connected to the processing system.

[0029] In this scheme, the processing system can directly analyze and calculate the experimental data collected by the load sensor and the displacement sensor, and the display and the control panel are arranged above the device, which can be directly operated through the control panel and the data and analysis results can be viewed through the display. No other equipment needs to be connected externally, which is convenient and practical.

[0030] The positive progress effect of the utility model lies in: the sample container is used for placing the material to be measured, the exciting device acts on the material to be measured and generates dynamic load, the compression assembly is connected to the exciter, can be lifted into the sample container and contacts the material to be measured, and transmits the stable load generated by the exciter in the experiment process. BRIEF DESCRIPTION OF DRAWINGS

[0031] Figure 1 It is the structural schematic view of the comprehensive test equipment of the utility model embodiment.

[0032] Figure 2 It is the structural sectional view of the comprehensive test equipment of the utility model embodiment.

[0033] BRIEF DESCRIPTION OF DRAWINGS:

[0034] Exciting device 1

[0035] Exciter 2

[0036] Compression assembly 3

[0037] Push rod 4

[0038] Compression mold 5

[0039] Sample container 6

[0040] Heating device 7

[0041] Clamping part 8

[0042] Clamping plate 9

[0043] Elastic member 10

[0044] Protective cover 11

[0045] Load sensor 12

[0046] Displacement sensor 13

[0047] Display 14

[0048] Control panel 15

[0049] Base 16

[0050] Connecting seat 17 DETAILED DESCRIPTION

[0051] The utility model will be described more clearly and completely in combination with the preferred embodiments and the drawings.

[0052] In the embodiment, a comprehensive testing device is provided for testing dynamic modulus and damping ratio of a material, the comprehensive testing device is internally provided with a sample container 6, an exciting device 1, a load sensor 12 and a displacement sensor 13, the sample container 6 is arranged at the bottom of the comprehensive testing device, the exciting device 1 comprises an exciter 2 and a compression assembly 3, the exciter 2 is arranged at the top of the comprehensive testing device, the compression assembly 3 is connected with the exciter 2 and is located above the sample container 6 and is movable up and down relative to the sample container, the load sensor 12 is in contact with the exciter 2 and is used for measuring the load generated by the exciter 2, and the displacement sensor 13 is in contact with the compression assembly 3 and is used for measuring the compression amount of the compression assembly 3.

[0053] The sample container 6 is used for placing the material to be tested, the exciting device 1 acts on the material to be tested and generates a dynamic load, the compression assembly 3 is connected with the exciter 2 and is movable up and down to contact the material to be tested in the sample container 6 and transmit the stable load generated by the exciter 2 in the experiment process. The load sensor 12 and the displacement sensor 13 are in contact with the exciter 2 and the compression assembly 3 respectively, and simultaneously collect the dynamic load signal of the exciter 2 and the compression amount of the compression assembly 3 in the experiment process, so that the load data and the displacement data of the same material to be tested can be obtained without repeated experiments, and the structure is simple and practical.

[0054] Specifically, the comprehensive testing device comprises an openable box body, the sample container 6, the exciting device 1, the load sensor 12 and the displacement sensor 13 are arranged inside the box body, the box body can make the appearance of the comprehensive testing device more simple and form a whole, and can also protect the structure and components inside the box body.

[0055] In the embodiment, the comprehensive testing device further comprises a heating device 7, the heating device 7 is arranged around the sample container 6. The heating device 7 is arranged for temperature control of the material to be tested, so as to ensure the accuracy of the experimental results, and is arranged around the sample container 6, so that the material to be tested in the sample container 6 can be uniformly heated, and the heating efficiency of the experiment is improved.

[0056] Further, the sample container 6 has a barrel structure, the heating device 7 has a cylindrical furnace body, the sample container 6 is nested in the heating device 7, and the heating device 7 is connected to the bottom of the comprehensive testing device; or the box body further comprises a base 16, the base 16 is arranged at the bottom of the box body, and the heating device 7 is arranged above the base 16.

[0057] The barrel-shaped sample container 6 has a larger volume and is suitable for the shape of most materials to be tested, and the cylindrical furnace body is used as the heating device 7, which is simple in structure and suitable for the barrel-shaped sample container 6. The two are matched with each other to uniformly heat the material to be tested and reduce heat loss. The heating device 7 is connected to the bottom of the device and / or the base 16. The base 16 provided at the bottom of the device can act as a shock absorber to prevent the experimental data from being inaccurate or the experimental equipment and site from being damaged due to excitation affecting other structures of the device during the experiment, thereby improving the safety of the comprehensive testing device and prolonging the service life of the device. In other embodiments, the structure of the sample container 6 and the heating device 7 is not specifically limited as long as it can hold the material to be tested and uniformly heat the material to be tested.

[0058] In this embodiment, the sample container 6 is provided with a clamping portion 8 connected to the inner wall of the sample container 6. The clamping portion 8 includes a clamping plate 9 and an elastic member 10, and the clamping plate 9 is elastically connected to the sample container 6 through the elastic member 10. The clamping portion 8 can be used to fix the material to be tested, so that the material to be tested does not shift or fall off during the experiment, thereby avoiding affecting other components or experimental data. The clamping plate 9 is connected to the sample container 6 through the elastic member 10 and can be adjusted to adapt to different sizes of the material to be tested, thereby ensuring that the material to be tested remains stable during the test.

[0059] Further, the comprehensive testing device includes a plurality of clamping portions 8 uniformly arranged around the inner wall of the sample container 6. The plurality of clamping portions 8 can more stably fix the material to be tested in the sample container 6, thereby ensuring that the material to be tested does not shift during excitation, which can cause a large error in experimental data. The plurality of clamping portions 8 are uniformly arranged on the inner wall of the sample container 6, so that the material to be tested is uniformly stressed and has a good clamping effect, thereby improving the reliability of the comprehensive testing device.

[0060] Specifically, the comprehensive testing device in this embodiment has two clamping portions 8 made of high-strength material and connected to the inner wall of the sample container 6 through high-strength springs, which can be adjusted to adapt to different materials. In other embodiments, the number and connection method of the clamping portions 8 are not specifically limited as long as they can fix the material to be tested in the sample container 6 during the experiment.

[0061] In this embodiment, the load sensor 12 and the exciter 2 are connected to the top of the box through the connecting seat 17, and the load sensor 12 is arranged around the exciter 2. The load sensor 12 and the exciter 2 are connected to the top of the box through the connecting seat 17 to avoid affecting other structures of the device during excitation, which can cause inaccurate experimental data. At the same time, the load sensor 12 is arranged around the exciter 2, which can enable the load sensor 12 to accurately collect the load generated during the excitation of the exciter 2, thereby improving the accuracy of the experimental data.

[0062] Specifically, the connecting seat 17 has an open downward containing space, the load sensor 12 and the exciter 2 are arranged in the containing space, the connecting seat 17 is connected to the inner top of the box body, and the exciter 2 is connected to the inner cavity top of the connecting seat 17. In other embodiments, the load sensor 12 and the exciter 2 can also be connected to the comprehensive testing device through other connection modes or structures, as long as the use is not affected.

[0063] In the embodiment, the compression assembly 3 includes a push rod 4 and a compression mold 5, the top of the push rod 4 is connected to the exciter 2, the bottom of the push rod 4 is connected to the compression mold 5, the push rod 4 can move up and down in the vertical direction to drive the compression mold 5 to move up and down, and the compression mold 5 is aligned with the opening of the sample container 6 in the vertical direction. The push rod 4 is connected to the exciter 2 for realizing the up-and-down movement in the vertical direction, and the compression mold 5 is connected to the bottom of the push rod 4 and is driven to move up and down by the push rod 4. At the same time, the compression mold 5 is aligned with the opening of the sample container 6, so that the compression mold 5 can extend into the sample container 6 to contact or apply pressure to the material to be tested after being pressed down.

[0064] In the embodiment, the push rod 4 and the compression mold 5 in the excitation device 1 can be disassembled, and different types of compression molds 5 can be replaced according to different experimental conditions during the experiment, for adapting to different materials to be tested. The push rod 4 can realize the lifting function by configuring a motor, a worm gear and a worm, and the specific structure is not limited, as long as the lifting function can be realized.

[0065] Further, the comprehensive testing device internally includes a protective cover 11, the protective cover 11 is connected to the top of the box body, one end of the displacement sensor 13 is connected to the inner wall of the protective cover 11, and the other end of the displacement sensor 13 is in contact with the push rod 4. The protective cover 11 is arranged for protecting the load sensor 12 and the displacement sensor 13, and at the same time, external interference during the experiment is avoided, the accuracy of the data is improved, and the service life of the sensor is prolonged. The displacement sensor 13 is directly connected to the protective cover 11, and stable contact with the push rod 4 can be realized without other components, so that the structure is simple and practical.

[0066] Specifically, part of the push rod 4 and the compression mold 5 extend out of the protective cover 11. Part of the compression assembly 3 can extend out of the protective cover 11 to move, and the arrangement of the protective cover 11 does not affect the cooperation of the excitation device 1 and the sample container 6. The protective cover 11 is a square box body connected to the upper top of the box body, and a through hole is formed in the bottom for extending the push rod 4 and the compression mold 5. One end of the displacement sensor 13 is fixed to the inner wall of the protective cover 11, and the other end is in contact with the push rod 4 for collecting displacement data. In other embodiments, other components can also be arranged to protect the sensor and the excitation device 1.

[0067] In other embodiments, the comprehensive testing device further comprises a processing system, the load sensor 12 and the displacement sensor 13 are electrically connected to the processing system respectively; a display 14 and a control panel 15 are arranged above the comprehensive testing device, and the display 14 and the control panel 15 are electrically connected to the processing system. The processing system can directly analyze and calculate the experimental data collected by the load sensor 12 and the displacement sensor 13, and the display 14 and the control panel 15 are arranged above the device, which can be directly operated through the control panel 15, and the data and analysis results can be viewed through the display 14, without the need for external devices, which is convenient and practical.

[0068] Specifically, the use steps of the comprehensive testing device are as follows:

[0069] Step S1: place the measured object into the sample container 6 and fix it with the clamping piece therein, and start heating the sample container 6;

[0070] Step S2: after heating, control the push rod 4 of the excitation device 1 to extend and enter the sample container 6, so that the compression mold 5 contacts the measured object;

[0071] Step S3: turn on the exciter 2, and at the same time, press down the compression mold 5 through the push rod 4, collect the movement distance data of the push rod 4 through the displacement sensor 13, and collect the load data generated by the exciter 2 through the load sensor 12;

[0072] Step S4: calculate the collected data by the processing system, and finally obtain the damping ratio and dynamic modulus of the measured object.

[0073] Although the specific embodiments of the present application are described above, those skilled in the art should understand that this is only an example, and the protection scope of the present application is defined by the appended claims. Those skilled in the art can make various changes or modifications to these embodiments without departing from the principles and essence of the present application, and these changes and modifications all fall within the protection scope of the present application.

Claims

1. A comprehensive testing apparatus for testing the dynamic modulus and damping ratio of a material, characterized by, The comprehensive testing device is internally provided with a sample container, a vibration excitation device, a load sensor and a displacement sensor, the sample container is arranged at the bottom of the comprehensive testing device, the vibration excitation device comprises a vibration exciter and a compression assembly, the vibration exciter is arranged at the top of the comprehensive testing device, the compression assembly is connected with the vibration exciter and located above the sample container and moves up and down relative to the sample container; The load sensor is in contact with the vibration exciter and is used for measuring the load generated by the vibration exciter, and the displacement sensor is in contact with the compression assembly and is used for measuring the compression amount of the compression assembly.

2. The integrated test equipment of claim 1, wherein, The comprehensive testing device further comprises a heating device, and the heating device surrounds the sample container.

3. The integrated test equipment of claim 2, wherein, The sample container is in a barrel structure, the heating device is in a columnar furnace body, the sample container is nested in the heating device, and the heating device is connected to the bottom of the comprehensive testing device. The comprehensive testing device further comprises a base arranged above the bottom of the comprehensive testing device.

4. The integrated test equipment of claim 1, wherein, The sample container is internally provided with a clamping portion connected to the inner wall of the sample container. The clamping portion comprises a clamping plate and an elastic member, and the clamping plate is elastically connected to the sample container through the elastic member.

5. The integrated test equipment of claim 4, wherein, The comprehensive testing device comprises a plurality of clamping portions uniformly arranged around the inner wall of the sample container.

6. The integrated test equipment of claim 1, wherein, The load sensor and the vibration exciter are connected to the top of the comprehensive testing device through a connecting seat, and the load sensor is arranged around the vibration exciter.

7. The integrated test equipment of claim 6, wherein, The compression assembly comprises a push rod and a compression mold, the top of the push rod is connected to the vibration exciter, the compression mold is connected to the bottom of the push rod, the push rod can move up and down in the vertical direction to drive the compression mold to move up and down, and the compression mold is aligned with the opening of the sample container in the vertical direction.

8. The integrated test equipment of claim 7, wherein, The comprehensive testing device internally comprises a protective cover connected to the top of the comprehensive testing device, one end of the displacement sensor is connected to the inner wall of the protective cover, and the other end of the displacement sensor is in contact with the push rod.

9. The integrated test equipment of claim 8, wherein, Part of the push rod and the compression mold protrude out of the protective cover.

10. The integrated test equipment of claim 1, wherein, The comprehensive testing device further comprises a processing system, and the load sensor and the displacement sensor are respectively electrically connected to the processing system. A display and a control panel are arranged above the comprehensive testing device, and the display and the control panel are electrically connected to the processing system.

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