Acousto-optic force synchronous detection device for friction between rock and chippings

Abstract

The utility model discloses an acousto-optic force synchronous detection device for friction between rocks and chippings, belongs to the technical field of acousto-optic detection, and solves the problem that the existing acousto-optic detection mode is large in detection error. The device specifically comprises a detection table, an acousto-optic generation chamber is installed on the detection table, and a shading cover is arranged above the acousto-optic generation chamber; chippings are laid in the acousto-optic generation chamber, and a rock sliding block is placed on the chippings; a rope is connected to the rock sliding block and penetrates through a round hole in the side face of the shading cover to be connected with a tension detection mechanism. An acoustic emission probe is fixed on the rock sliding block; a photoelectric detection assembly is arranged at the bottom of the acousto-optic generation chamber. According to the utility model, the tension detection mechanism pulls the rock slide block to move in the acousto-optic generation chamber, so that the rock slide block rubs with debris, the acoustic emission probe and the photoelectric detection assembly respectively detect acoustic signals and optical signals generated in the friction process, and the light shield shields the photoelectric generation chamber, so that the detection result is prevented from being influenced by other light sources; and the accuracy of a detection result is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of sound and light detection, in particular to a device for synchronously detecting sound and light forces of friction between rocks and debris. Background Art

[0002] Rock debris is small particles formed by natural processes such as weathering and erosion. Its physical properties include, but are not limited to, hardness, shape, surface roughness, and mineral composition. These properties directly affect the friction behavior between the debris, and thus the generation and propagation of acoustic and optical signals during the friction process. Sand particle debris, another common natural substance, also has physical properties such as particle size distribution, density, and shape factor that have an important influence on the friction process. Rock and sand particle debris are more likely to produce tiny deformations and vibrations during the friction process, thereby enhancing the intensity of the acoustic and optical signals. In order to gain a deeper understanding of the nature of this process, it is particularly important to develop a device that can simultaneously detect acoustic, optical, and force signals during the friction process.

[0003] The device for synchronous acoustic, optical, and force detection of rock and sand particle fragments has broad application prospects in multiple fields. In geological exploration, it can be used to analyze the friction characteristics and wear degree of rock fragments, providing important data support for rock mechanics and structural geology research. In materials science, it can be used to evaluate the wear resistance and friction properties of materials, providing a reference for the development and application of new materials.

[0004] The existing synchronous detection method is to place a rock slider on the laboratory table and pull the rock slider to cause friction with the debris on the laboratory table. This will cause the friction generated not only from the friction between the slider and the debris, but also from the slider and the laboratory table, resulting in errors in the measured data; the rock slider is placed in the center of the laboratory table, and its position may be greatly offset during the pulling process; and the rock slider is exposed to the indoor environment. There is no guarantee that the photomultiplier tube collects all the light emitted by the sample, resulting in inaccurate detection results. Utility Model Content

[0005] In view of the deficiencies in the prior art, the utility model provides a device for synchronously detecting the acoustic and optical forces of the friction between rocks and debris, which solves the problem of large detection errors in the prior detection methods.

[0006] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0007] A synchronous acoustic and optical force detection device for rock and debris friction comprises a detection platform, an acoustic and optical generating chamber is mounted on the detection platform, and a light shielding cover is provided above the acoustic and optical generating chamber; debris is laid inside the acoustic and optical generating chamber, and a rock slider is placed on the debris; a rope is connected to the rock slider, and the rope passes through a circular hole on the side of the light shielding cover and is connected to a tension detection mechanism;

[0008] An acoustic emission probe is fixed on the rock slider; and a photoelectric detection component is arranged at the bottom of the sound and light generating chamber.

[0009] In this solution, the tension detection mechanism pulls the rock slider to move in the sound and light generating chamber, causing it to rub against the debris. The acoustic emission probe detects the acoustic signal generated during the friction process, and the photoelectric detection component detects the light signal generated during the friction process of the rock slider. The rock slider in this design is confined to move inside the photoelectric generating chamber, avoiding displacement during its movement. The light shield protects the photoelectric generating chamber by shading it, ensuring that the photoelectric detection component detects the light signal generated by the friction between the rock slider and the debris, avoiding other light from affecting the detection results, and improving the accuracy of the detection results.

[0010] Furthermore, the sound and light generating chamber includes a glass bottom plate, which is mounted on a light-transmitting hole in the middle of the detection platform; the glass bottom plate is provided with two parallel strip grooves, and two glass side plates are fixed in the two strip grooves respectively; the rock slider is placed between the two glass side plates, and debris is laid between the rock slider and the glass bottom plate;

[0011] The photoelectric detection component is fixed at the bottom of the light-transmitting hole of the detection platform.

[0012] In this scheme, the rock slider slides on a glass bottom plate covered with debris, which ensures that the detected optical and electrical signals are generated by the friction between the rock slider and the debris, eliminating the influence of the direct friction between the rock slider and the laboratory table; and the two glass side panels can prevent the rock debris from shifting during sliding.

[0013] Furthermore, the photoelectric detection assembly includes an installation chamber, which has flange edges on both wings and is installed at the bottom of the detection platform by bolts passing through the flange edges; two sets of clamp assemblies are provided in the installation chamber, and a photomultiplier tube is clamped in the middle of the two sets of clamp assemblies, and the incident window of the photomultiplier tube is located directly below the glass bottom plate.

[0014] In this solution, a fixture assembly clamps the photomultiplier tube directly below the glass base. The light signal generated by the friction between the rock slider and the debris can pass through the glass base and be collected by the photomultiplier tube. This designed photomultiplier tube can closely contact the friction position of the rock slider and the debris, and the collected light signal is accurate with small errors.

[0015] Furthermore, the clamp assembly includes an arc-shaped clamping plate and a screw; the two arc-shaped clamping plates of the two sets of clamp assemblies are slidably set on the slide rail at the bottom of the installation chamber; the photomultiplier tube is clamped between the two arc-shaped clamping plates; the two sides of the two arc-shaped clamping plates are movably connected to two screws, and the two screws pass through the two threaded holes on both sides of the installation chamber respectively, and the ends of the two screws are connected with four-corner nuts.

[0016] In this solution, the screws are rotated by the four-corner nuts, and the two screws respectively drive the two arc-shaped clamping plates to move toward each other along the slide rails to clamp the photomultiplier tube, making the photomultiplier tube easy to install and disassemble.

[0017] Furthermore, a rubber pad is bonded to the contact surface between the arc-shaped clamping plate and the photomultiplier tube.

[0018] In this solution, the rubber pad can prevent the arc-shaped clamping plate from clamping too hard and damaging the photomultiplier tube.

[0019] Furthermore, a circle of step grooves is provided around the light-transmitting hole in the middle of the testing platform, and the glass bottom plate is fixed in the step grooves.

[0020] In this solution, the design structure is simple, and when installing the glass bottom plate, it can be well fixed by placing it in the step groove, which is convenient for installation.

[0021] Furthermore, the tension detection mechanism includes a universal testing machine, the upper clamp of the universal testing machine is clamped with an upper connecting column, the bottom of the upper connecting column is threadedly connected to one end of the tension sensor, and the other end of the tension sensor is threadedly connected to a hook; the hook is connected to one end of the rope, and the other end of the rope passes around the fixed pulley and is connected to the rock slider; the fixed pulley is fixed on the top of the lower connecting column, and the lower connecting column is clamped on the lower clamp of the universal testing machine.

[0022] In this solution, a universal testing machine is used to provide tension, and the tension of the universal testing machine is detected by a tension sensor, so that the measurement result of the tension is more accurate.

[0023] The beneficial effects of the utility model are:

[0024] The present invention provides a synchronous acoustic and optical force detection device for rock-debris friction. A rock slider is pulled between two glass side panels, causing friction between the slider and the debris below. During the sliding process, a tension sensor detects the tension, an acoustic emission probe detects the acoustic signal generated during the friction process, and a photomultiplier tube detects the optical signal generated. This achieves synchronous detection of tension, acoustic, and optical signals. During the detection process, a light shield is used to block the friction process, preventing external light from affecting the photomultiplier tube, eliminating external interference factors and improving the accuracy of the detection results. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 This is a schematic structural diagram of a device for synchronously detecting the acoustic and optical forces of rock and debris friction according to the present invention;

[0026] Figure 2 This is a schematic diagram of the cross-sectional structure of the detection platform, sound and light generating chamber and photoelectric detection assembly of the utility model;

[0027] Figure 3 This is a schematic diagram of the light shielding cover structure of the utility model.

[0028] Reference numerals:

[0029] 1. Test table; 11. Step trough; 2. Sound and light generating chamber; 21. Glass bottom plate; 22. Glass side panels; 3. Debris; 4. Rock slide; 5. Rope; 6. Tension detection mechanism; 61. Universal testing machine; 611. Upper clamp; 612. Lower clamp; 62. Upper connecting column; 63. Hook; 64. Fixed pulley; 65. Lower connecting column; 66. Tension sensor; 7. Acoustic emission probe; 8. Photoelectric detection assembly; 81. Installation chamber; 82. Clamp assembly; 821. Curved clamp; 822. Screw; 823. Rubber pad; 83. Photomultiplier tube; 84. Slide rail; 9. Light shield; DETAILED DESCRIPTION

[0030] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. The specific embodiments of the present invention are described below to facilitate understanding of the present invention by those skilled in the art. However, it should be understood that the present invention is not limited to the specific embodiments. For those skilled in the art, as long as various variations are within the spirit and scope of the present invention as defined and determined by the appended claims, these variations are obvious, and all inventions and creations utilizing the concepts of the present invention are protected.

[0031] like Figure 1 As shown, this embodiment provides a synchronous acoustic and optical force detection device for rock-debris friction, which is used to detect the acoustic and optical signals generated during the friction between the rock slider and the debris, thereby providing an experimental basis for studying the deformation and vibration caused by the friction between the two. The device specifically includes:

[0032] Testing platform 1, sound and light generating chamber 2, tension detection mechanism 6, rope 5, acoustic emission probe 7, photoelectric detection component 8 and light shielding cover 9;

[0033] Among them, the detection platform 1 is equipped with an acoustic and light generating chamber 2, and a light shielding cover 9 is provided above the acoustic and light generating chamber 2; debris 3 is laid inside the acoustic and light generating chamber 2, and a rock slider 4 is placed above the debris 3; a rope 5 is connected to the rock slider 4, and the rope 5 passes through the circular hole on the side of the light shielding cover 9 and is connected to the tension detection mechanism 6. The light shield structure is as follows Figure 3 As shown; an acoustic emission probe 7 is fixed on the rock slider 4; a photoelectric detection component 8 is provided at the bottom of the sound and light generating chamber 2; during detection, the tension detection mechanism 6 pulls the rock slider 4 to move in the sound and light generating chamber 2, causing it to rub against the debris 3, the acoustic emission probe 7 detects the sound signal generated during the friction process, and the photoelectric detection component 8 detects the light signal generated during the friction process by the rock slider 4.

[0034] The sound and light generating chamber 2 includes a glass bottom plate 21 and two glass side plates 22; the glass bottom plate 21 is installed on a light-transmitting hole opened in the middle of the detection table 1; two parallel strip grooves are opened on the glass bottom plate 21, and two glass side plates 22 are fixed in the two strip grooves respectively; the rock slider 4 is placed between the two glass side plates 22, and debris 3 is laid between the rock slider 4 and the glass bottom plate 21; the rock slider 4 slides on the glass bottom plate 21 laid with debris 3, which can ensure that the detected light signal and electrical signal are generated by the mutual friction between the rock slider 4 and the debris 3, eliminating the influence of the direct friction between the rock slider 4 and the laboratory table; the photoelectric detection component 8 is fixed at the bottom of the light-transmitting hole of the detection table 1.

[0035] like Figure 2 As shown, the photoelectric detection assembly 8 includes a mounting chamber 81, two sets of clamp assemblies 82 and a photomultiplier tube 83; the two wings of the mounting chamber 81 are provided with flange edges, and the mounting chamber 81 is installed on the bottom of the detection platform 1 by bolts passing through the flange edges; two sets of clamp assemblies 82 are provided in the mounting chamber 81, and the photomultiplier tube 83 is clamped between the two sets of clamp assemblies 82, and the incident window of the photomultiplier tube 83 is located directly below the glass bottom plate 21; the photomultiplier tube 83 of this design can be in close contact with the friction position of the rock slider 4 and the debris 3, and the collected light signal is accurate and the error is small.

[0036] The clamp assembly 82 includes an arc-shaped clamping plate 821 and a screw 822; the two arc-shaped clamping plates 821 of the two sets of clamp assemblies 82 are slidably set on the slide rail 84 at the bottom of the installation chamber 81; the photomultiplier tube 83 is clamped between the two arc-shaped clamping plates 821; the two sides of the two arc-shaped clamping plates 821 are movably connected to the two screws 822, and the two screws 822 pass through the two threaded holes on both sides of the installation chamber 81 respectively, and the ends of the two screws 822 are connected with four-corner nuts; the screws 822 are rotated by the four-corner nuts, and the two screws 822 respectively drive the two arc-shaped clamping plates 821 to move toward each other along the slide rail 84, clamping the photomultiplier tube 83, making it easy to install and disassemble the photomultiplier tube 83.

[0037] A rubber pad 823 is bonded to the contact surface between the arc-shaped clamping plate 821 and the photomultiplier tube 83 ; the rubber pad 823 can prevent the arc-shaped clamping plate 821 from clamping too hard and damaging the photomultiplier tube 83 .

[0038] A circle of step grooves 11 are provided around the light-transmitting hole in the middle of the detection platform 1, and the glass bottom plate 21 is fixed in the step groove 11; the design structure is simple, and when installing the glass bottom plate 21, it can be well fixed by placing it in the step groove 11, and the installation is convenient.

[0039] The tension detection mechanism 6 includes a universal testing machine 61, an upper connecting column 62, a tension sensor 66, a hook 63, a fixed pulley 64 and a lower connecting column 65; the upper connecting column 62 is clamped on the upper clamp 611 of the universal testing machine 61, the bottom of the upper connecting column 62 is threadedly connected to one end of the tension sensor 66, and the other end of the tension sensor 66 is threadedly connected to the hook 63; the hook 63 is connected to one end of the rope 5, and the other end of the rope 5 passes around the fixed pulley 64 and is connected to the rock slider 4; the fixed pulley 64 is fixed to the top of the lower connecting column 65, and the lower connecting column 65 is clamped on the lower clamp 612 of the universal testing machine 61.

[0040] In this embodiment, the acoustic emission probe 7 can be directly glued to the top of the rock slider 4 by glue, ensuring that the acoustic emission probe 7 moves synchronously with the rock slider 4 during movement.

[0041] As a preference of this embodiment, the acoustic emission probe 7 can adopt a PXR04A air-coupled acoustic emission sensor; the photomultiplier tube 83 can adopt an N1012-1 photomultiplier tube; and the universal testing machine 61 is a conventional laboratory equipment.

[0042] The working principle of this embodiment is:

[0043] When the synchronous acoustic and optical force detection device for the friction between rocks and debris 3 provided in this embodiment is used, the universal testing machine 61 is started, and the upper clamp 611 of the universal testing machine 61 pulls the hook 63 to move upward. During the movement, the hook 63 pulls the rope 5 to move; the rope 5 pulls the rock slider 4 to slide between the two glass side panels 22. During the sliding, the rock slider 4 and the debris 3 at the bottom thereof rub against each other, and the acoustic emission probe 7 detects the acoustic signal generated during the friction process; at the same time, the optical signal generated by the friction between the rock slider 4 and the debris 3 can be collected by the photomultiplier tube 83 through the transparent glass bottom panel 21, thereby realizing the detection of acoustic and optical signals.

[0044] Those skilled in the art will appreciate that the embodiments herein are intended to help readers understand the principles of the present invention, and should be understood that the scope of protection of the present invention is not limited to such specific descriptions and embodiments. Those skilled in the art can, based on the technical teachings disclosed in this utility model, make various other specific variations and combinations that do not depart from the essence of the present invention, and such variations and combinations are still within the scope of protection of the utility model.

Claims

1. A device for synchronously detecting the acoustic and optical forces of rock and debris friction, characterized by: The invention comprises a detection platform (1), wherein an acousto-optic generating chamber (2) is installed on the detection platform (1), and a light shielding cover (9) is provided above the acousto-optic generating chamber (2); debris (3) is laid inside the acousto-optic generating chamber (2), and a rock slider (4) is placed on the debris (3); a rope (5) is connected to the rock slider (4), and the rope (5) passes through a circular hole on the side of the light shielding cover (9) and is connected to a tension detection mechanism (6); An acoustic emission probe (7) is fixed on the rock slider (4); and a photoelectric detection component (8) is provided at the bottom of the acoustic and optical generating chamber (2).

2. The device for synchronously detecting the acoustic and optical forces of rock and debris friction according to claim 1, characterized in that: The sound and light generating chamber (2) comprises a glass bottom plate (21), the glass bottom plate (21) being mounted on a light-transmitting hole provided in the middle of the detection platform (1); two parallel strip grooves are provided on the glass bottom plate (21), two glass side plates (22) are fixed in the two strip grooves respectively; the rock slider (4) is placed between the two glass side plates (22), and the debris (3) is laid between the rock slider (4) and the glass bottom plate (21); The photoelectric detection component (8) is fixed at the bottom of the light-transmitting hole of the detection platform (1).

3. The device for synchronously detecting the acoustic and optical forces of rock and debris friction according to claim 2, characterized in that: The photoelectric detection assembly (8) includes a mounting chamber (81), two wings of the mounting chamber (81) are provided with flange edges, and the mounting chamber (81) is installed on the bottom of the detection platform (1) by means of bolts passing through the flange edges; two groups of clamp assemblies (82) are provided in the mounting chamber (81), and a photomultiplier tube (83) is sandwiched between the two groups of clamp assemblies (82), and an incident window of the photomultiplier tube (83) is located directly below the glass bottom plate (21).

4. The device for synchronously detecting the acoustic and optical forces of rock and debris friction according to claim 3, characterized in that: The clamp assembly (82) includes an arc-shaped clamping plate (821) and a screw rod (822); the two arc-shaped clamping plates (821) of the two groups of the clamp assembly (82) are slidably arranged on the slide rail (84) at the bottom of the installation chamber (81); the photomultiplier tube (83) is clamped between the two arc-shaped clamping plates (821); the two screw rods (822) are movably connected to the opposite sides of the two arc-shaped clamping plates (821), and the two screw rods (822) respectively pass through the two threaded holes on both sides of the installation chamber (81), and the ends of the two screw rods (822) are connected with four-corner nuts.

5. The device for synchronously detecting the acoustic and optical forces of rock and debris friction according to claim 4, characterized in that: A rubber pad (823) is bonded to the contact surface between the arc-shaped clamping plate (821) and the photomultiplier tube (83).

6. The device for synchronously detecting the acoustic and optical forces of rock and debris friction according to claim 2, characterized in that: A circle of step grooves (11) is provided around the light-transmitting hole in the middle of the detection platform (1), and the glass bottom plate (21) is fixed in the step grooves (11).

7. The device for synchronously detecting the acoustic and optical forces of rock and debris friction according to claim 1, characterized in that: The tension detection mechanism (6) includes a universal testing machine (61), an upper connecting column (62) is clamped on an upper clamp (611) of the universal testing machine (61), the bottom of the upper connecting column (62) is threadedly connected to one end of a tension sensor (66), and the other end of the tension sensor (66) is threadedly connected to a hook (63); the hook (63) is connected to one end of the rope (5), and the other end of the rope (5) is passed around a fixed pulley (64) and connected to the rock slider (4); the fixed pulley (64) is fixed to the top of a lower connecting column (65), and the lower connecting column (65) is clamped on the lower clamp (612) of the universal testing machine (61).

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