Vibration generating device for quantitative identification of fracture direction and number and method of use

Abstract

This invention relates to the technical field of vibration generating devices for fracture detection, specifically a vibration generating device and its method for quantitatively identifying the direction and quantity of fractures. The device includes a central shaft and a vibration unit. Several sets of vibration units are spaced vertically along the central shaft. Each vibration unit includes a vibrating plate, a connecting plate, a rotating wheel, and a driving device. Several vibrating plates are evenly distributed around the outer circumference of the central shaft, and each vibrating plate is connected to a connecting plate mounted on the outside of the central shaft via a connector. A rotating wheel is mounted on the connecting plate, and a driving device is mounted on the central shaft below the connecting plate. The driving device is connected to the rotating wheel, and rotating the wheel causes the vibrating plate to reciprocate. This invention has a reasonable and compact structure and is easy to use. By setting several sets of vertically spaced vibration units, it generates vibrations at multiple depths, enabling the stimulation of vibration responses underground or within structures at different depths, thus allowing for the identification and analysis of fractures of different depths and types.

Description

Technical Field

[0001] This invention relates to the field of vibration generation devices for fracture detection, and is a vibration generation device and its usage method for quantitative identification of fracture direction and quantity. Background Technology

[0002] In fields such as geological exploration, engineering safety assessment, and structural health monitoring, accurately identifying the direction and number of fractures underground or within structures is of profound and undeniable importance. These fractures are not only fundamental components of geological structures but also directly affect resource distribution, the prediction and prevention of geological disasters, and the stability and safety of engineering structures.

[0003] In oil, gas, and mineral resource exploration, fracture systems are often closely related to resource accumulation and migration. By accurately identifying the direction and number of fractures, resource distribution can be predicted more precisely, exploration deployment can be optimized, drilling success rates can be improved, thereby saving exploration costs and accelerating resource development.

[0004] Geological disasters such as earthquakes, landslides, and debris flows are often closely related to underground fault activity. Accurate identification of fault systems helps assess the risk level of geological disasters, formulate effective disaster prevention and mitigation measures, protect people's lives and property, and maintain social stability. In civil engineering, transportation construction, water conservancy and hydropower, the stability of engineering structures is directly related to people's safety and economic development. By monitoring the internal fracture conditions of structures, potential safety hazards can be detected in a timely manner, and reinforcement measures can be taken to ensure the long-term safe operation of engineering structures. The research and application of fracture recognition imaging devices will promote the interdisciplinary integration of geology, geophysics, materials science, information technology, and other disciplines, driving technological progress and industrial upgrading in related fields.

[0005] Currently, the main technologies used for identifying fracture direction and quantity include the following: Vibration monitoring typically includes a vibration generator, a signal receiver, and a data analysis system. The vibration generator transmits vibration signals underground or into the structure, the signal receiver receives and converts these signals, and finally, the data analysis system processes and interprets them. Vibration monitoring offers advantages such as ease of operation and rapid data acquisition; however, its core problem lies in the poor fit between the vibration generator and the rock mass, leading to significant signal loss during transmission and reduced signal transmission efficiency, thus affecting the accurate identification of fractures. Furthermore, vibration signals from a single point cannot comprehensively reflect fracture conditions at different depths and of different types, limiting its quantitative analysis capabilities.

[0006] Remote sensing technology utilizes satellites, aircraft, and other remote sensing platforms to acquire surface information through methods such as spectroscopy, thermal infrared, and radar. Combined with image processing and analysis techniques, it identifies surface and shallow fault structures. Remote sensing technology has advantages such as wide coverage and fast data acquisition speed, making it suitable for fault surveys over large areas. However, its ability to identify deep underground faults is relatively weak, and it is significantly affected by factors such as weather and surface cover.

[0007] Non-destructive testing (NDT) technologies include various methods such as ultrasonic testing, acoustic emission testing, and infrared thermography. These methods inspect the interior of structures non-contactly or at low contact to identify defects such as fractures. NDT technologies can perform inspections without affecting structural integrity and offer advantages such as operational flexibility and intuitive results. However, their ability to detect complex structures and deep fractures is limited, and some technologies are costly. Summary of the Invention

[0008] This invention provides a vibration generating device and method for quantitative identification of fracture direction and quantity, overcoming the shortcomings of the prior art. It can effectively solve the problem that the vibration signal of the existing vibration generator at a single point limits the identification and quantitative analysis of fractures of different depths and types.

[0009] One of the technical solutions of the present invention is achieved through the following measures: a vibration generating device for quantitative identification of fracture direction and quantity, comprising a central shaft and vibration devices, wherein a plurality of vibration devices are arranged vertically and horizontally on the central shaft, and the vibration devices include a vibration plate, a connecting plate, a rotating wheel, and a driving device. A plurality of vibration plates are evenly distributed and spaced apart along the outer circumference of the central shaft, and each vibration plate is connected to the connecting plate fitted on the outside of the central shaft through a connecting member. A rotating wheel is provided on the connecting plate, and a driving device is provided on the central shaft below the connecting plate. The driving device is connected to the rotating wheel, and the driving device can rotate the rotating wheel to make the vibration plate reciprocate.

[0010] The following are further optimizations and / or improvements to the above-mentioned technical solution: Preferably, the drive device includes a motor, a universal joint, a central gear, and side gears. The motor is fixedly mounted on the central shaft, and the output shaft of the motor is driven by the central gear. Several side gears mesh around the central gear, and each side gear is connected to the universal joint. The upper end of the universal joint is mounted together with the rotating wheel.

[0011] Preferably, the vibration device further includes a slider, and a vertically penetrating groove is provided on the connecting plate corresponding to each rotating wheel position. The slider is slidably mounted on the groove, and the rotating wheel is mounted on the slider.

[0012] Preferably, the vibration device further includes a spring, and the inner side of each vibration plate is connected to the slider via the spring.

[0013] Preferably, it also includes a fixed cylinder, a guide shaft, and a rotating cylinder. Several guide shafts are evenly distributed around the outer circumference of the central shaft. The lower end of the guide shaft passes through the connecting plate and the motor of each set of vibration devices in sequence. The guide shaft is fixedly connected to the connecting plate and slidably connected to the motor. The upper end of the guide shaft is installed together with the lower side of the fixed cylinder. The lower part of the rotating cylinder is rotatably connected to the fixed cylinder. The rotating cylinder is threadedly connected to the upper end of the central shaft.

[0014] Preferably, it also includes a side fixing pin, a claw, and a chuck. The chuck is provided inside the fixing cylinder. The upper side of the chuck is provided with a threaded groove. Several claws are provided along the circumference of the chuck. The bottom of each claw is slidably mounted on the chuck through the claw groove. A side fixing pin is fixedly installed at the outer end of each claw. The side fixing pin can pass through the fixing cylinder. The lower outer side of the rotating cylinder is fixedly installed together with the chuck.

[0015] Preferably, a support plate is fixed to the bottom of the central shaft, and a lower fixing nail is installed at the bottom of the support plate.

[0016] The second technical solution of the present invention is achieved through the following measures: a method of use, performed according to the following method, Drill a test hole at the geological survey center, place the device into the test hole, and ensure that the lower fixing nail is inserted into the bottom of the test hole and the support plate is in contact with the bottom of the test hole; Rotate the rotating drum to push the fixed drum and guide shaft downwards, adjust the distance between the connecting plate and the motor, and adjust the angle of the universal transmission rod so that each vibrating plate opens and fits against the side wall of the detection hole at the corresponding depth. At the same time, the side fixing nails extend outwards and insert into the circumference of the upper part of the detection hole to fix the device. The corresponding motor is started to make the vibrating plate emit vibration excitation waves to the surrounding rock mass. The frequency and amplitude of the vibration are adjusted by changing the output of the motor to ensure that the vibration signal is carried out in accordance with the predetermined pattern. By using multiple vibrations at different depths, the vibration response inside the rock mass is excited in different depth ranges. During the vibration process, vibration detectors distributed in different directions are used to capture the vibration signals generated by the vibrating plate. The detectors record the vibration response data and transmit it to the data acquisition system. The collected vibration data is analyzed and processed using methods such as frequency domain analysis, time domain analysis, and vibration modal analysis, which can identify abnormal vibration responses and quantify fractures, as well as information about the internal structure of the rock mass and the depth of the fractures. Visualize the identification and analysis results.

[0017] The present invention has a reasonable and compact structure and is easy to use. By setting up several sets of vibration devices with vertical spacing, it generates multiple vibrations at different depths, which can excite vibration responses underground or inside the structure within different depth ranges, and identify and analyze fractures of different depths and types. Attached Figure Description

[0018] Appendix Figure 1 This is a three-dimensional structural diagram of an embodiment of the present invention.

[0019] Appendix Figure 2 For the appendix Figure 1 A magnified schematic diagram of the vibration device in the diagram.

[0020] Appendix Figure 3 This is an enlarged schematic diagram of the vibrating plate.

[0021] Appendix Figure 4 This is an enlarged schematic diagram of the drive device.

[0022] Appendix Figure 5 This is a top-down enlarged structural diagram of the fixed cylinder.

[0023] Appendix Figure 6 This is a magnified schematic diagram of the three-dimensional structure inside the fixed cylinder.

[0024] The codes in the attached diagram are as follows: 1. Central shaft; 2. Vibrating plate; 21. Connecting plate; 22. Slide groove; 23. Slider; 24. Spring; 25. Rotary wheel; 3. Motor; 31. Universal transmission rod; 32. Central gear; 33. Side gear; 4. Guide shaft; 5. Support plate; 6. Lower fixing pin; 7. Fixing cylinder; 71. Side fixing pin; 72. Claw; 73. Chuck; 8. Rotary cylinder. Detailed Implementation

[0025] The present invention is not limited to the following embodiments, and the specific implementation can be determined according to the technical solution of the present invention and the actual situation.

[0026] In this invention, for ease of description, the description of the relative positions of the components is based on the appendix to the specification. Figure 1 The layout is described using a diagrammatic method, such as front, back, top, bottom, left, right, etc. The positional relationships are determined based on the layout direction of the attached diagram in the instruction manual.

[0027] The present invention will be further described below with reference to embodiments and accompanying drawings: Example 1: As shown in the attached document Figures 1-6 As shown, the vibration generating device for quantitative identification of fracture direction and quantity includes a central shaft 1 and vibration devices. Several sets of vibration devices are arranged vertically and vertically on the central shaft 1. Each vibration device includes a vibrating plate 2, a connecting plate 21, a rotating wheel 25, and a driving device. Several vibrating plates 2 are evenly distributed around the outer circumference of the central shaft 1. Each vibrating plate 2 is connected to the connecting plate 21, which is mounted on the outside of the central shaft 1, via a connector. A rotating wheel 25 is provided on the connecting plate 21. A driving device is provided on the central shaft 1 below the connecting plate 21. The driving device is connected to the rotating wheel 25. The driving device can rotate the rotating wheel 25 to make the vibrating plate 2 reciprocate.

[0028] A network of vibration detectors is deployed around the geological site to capture vibration signals generated by the vibrating plate 2. Vibration excitation is applied through the vibrating plate 2, and the vibration response data captured by the vibration detectors is recorded. The collected vibration data is analyzed and processed to identify fractures. This can include methods such as frequency domain analysis, time domain analysis, and vibration modal analysis to detect abnormal vibration responses and quantify fractures.

[0029] By vibrating at multiple depths, vibrational responses within an object can be excited within different depth ranges, which helps to obtain depth information about the object's internal structure and fractures. Vibrations at different depths can provide multiple layers of information, which can be superimposed to generate a more comprehensive image or data.

[0030] The vibration generating device used for quantitative identification of fracture direction and quantity can be further optimized and / or improved according to actual needs: Example 2: As shown in the attached document Figure 2 , 4 As shown, the driving device includes a motor 3, a universal joint 31, a central gear 32, and side gears 33. The motor 3 is fixedly mounted on the central shaft 1. The output shaft of the motor 3 is driven by the central gear 32. Several side gears 33 mesh around the central gear 32, and each side gear 33 is connected to the universal joint 31. The upper end of the universal joint 31 is mounted together with the rotating wheel 25. The motor 3 and the universal joint 31 drive the rotating wheel 25 to rotate, causing the vibrating plate 2 to reciprocate and vibrate synchronously.

[0031] Example 3: As shown in the attached document Figure 2 , 3 As shown, the vibration device also includes a slider 23. A vertically extending groove 22 is provided on the connecting plate 21 corresponding to the position of each rotating wheel 25. The slider 23 is slidably mounted on the groove 22, and the rotating wheel 25 is mounted on the slider 23. The slider 23 allows for convenient movement of the rotating wheel 25.

[0032] Example 4: As shown in the appendix Figure 2 , 3 As shown, the vibration device also includes a spring 24, and the inner side of each vibration plate 2 is connected to the slider 23 via the spring 24. The spring 24 ensures that the vibration plate 2 is always in contact with the side of the rotating wheel 25, so that the vibration plate 2 can respond to the vibration frequency of the rotating wheel 25.

[0033] Example 5: As shown in the attached document Figure 5 , 6As shown, the device also includes a fixed cylinder 7, guide shafts 4, and a rotating cylinder 8. Several guide shafts 4 are evenly distributed around the outer circumference of the central shaft 1. The lower ends of the guide shafts 4 pass sequentially through the connecting plate 21 and the motor 3 of each vibration device. The guide shafts 4 are fixedly connected to the connecting plate 21 and slidably connected to the motor 3. The upper ends of the guide shafts 4 are mounted together with the lower side of the fixed cylinder 7. The lower part of the rotating cylinder 8 is rotatably connected to the fixed cylinder 7, and the rotating cylinder 8 is threadedly connected to the upper end of the central shaft 1. By rotating the rotating cylinder 8, it moves downwards while rotating, pushing the fixed cylinder 7 downwards, thereby pushing the guide shafts 4 and the connecting plate 21. This changes the height of the central shaft 1 relative to the guide shafts 4, allowing the vibrating plate 2 to fit against the inner wall of the detection hole. In geological exploration and rock mechanics research, the vibration plate 2, when in close contact with the rock mass, can ensure more accurate and effective transmission of vibration signals into the rock mass, which helps to reduce signal attenuation during propagation. It can accurately measure the dynamic characteristics of the rock, such as wave velocity, elastic modulus, and wave damping, thereby analyzing the fracture direction and number of cracks in the rock mass. It can also generate high-resolution geological images to help determine the properties and distribution of underground rock strata.

[0034] Example 6: As attached Figure 5 , 6 As shown, it also includes side fixing pins 71, claws 72, and a chuck 73. The chuck 73 is located inside the fixed cylinder 7, with a threaded groove on its upper side. Several claws 72 are arranged along the circumference of the chuck 73. Each claw 72 is slidably mounted on the chuck 73 via a groove at its bottom. A side fixing pin 71 is fixedly installed at the outer end of each claw 72, and the side fixing pins 71 can protrude from the fixed cylinder 7. The lower outer side of the rotating cylinder 8 is fixedly installed with the chuck 73. When the rotating cylinder 8 rotates, the claws 72 can slide outwards. When the rotating cylinder 8 rotates and the vibrating plate 2 opens and adheres to the inner wall of the detection hole, the side fixing pins 71 also slide outwards to penetrate the inner wall of the detection hole, thereby fixing the device. Securely fixing the vibrator reduces the propagation of vibration signals to parts that do not need vibration, avoids interference with other parts, reduces errors in imaging, and thus improves the accuracy of measurement and analysis, and enhances the clarity of the image.

[0035] Example 7: As attached Figure 1 As shown, a support plate 5 is fixed to the bottom of the central shaft 1, and a lower fixing nail 6 is installed at the bottom of the support plate 5. By inserting the lower fixing nail 6 into the bottom of the detection hole, the support plate 5 is supported at the bottom of the detection hole, which can improve the stability of the device.

[0036] Example 8: As attached Figures 1-6 As shown, the usage method is as follows. Drill a test hole at the geological survey center, place the device into the test hole, and ensure that the lower fixing nail 6 is inserted into the bottom of the test hole and the support plate 5 is in contact with the bottom of the test hole; Rotate the rotating drum 8 to push the fixed drum 7 and guide shaft 4 downward, adjust the distance between the connecting plate 21 and the motor 3, adjust the angle of the universal transmission rod 31, so that each vibrating plate 2 opens and fits against the side wall of the detection hole at the corresponding depth. At the same time, the side fixing nail 71 extends outward and inserts into the periphery of the upper part of the detection hole to fix the device. The corresponding motor 3 is started to make the vibrating plate 2 emit vibration excitation waves to the surrounding rock mass. The frequency and amplitude of vibration are adjusted by changing the output of the motor 3 to ensure that the vibration signal is carried out in accordance with the predetermined pattern. By using multiple vibrations at different depths, the vibration response inside the rock mass is excited in different depth ranges. During the vibration process, vibration detectors distributed in different directions are used to capture the vibration signals generated by the vibrating plate 2. The detectors record the vibration response data and transmit it to the data acquisition system. The collected vibration data is analyzed and processed using methods such as frequency domain analysis, time domain analysis, and vibration modal analysis, which can identify abnormal vibration responses and quantify fractures, as well as information about the internal structure of the rock mass and the depth of the fractures. Visualize the identification and analysis results.

[0037] This method can help to quantitatively identify the direction and number of fractures and provide in-depth information about the geology or internal structure, which is of great significance for applications such as geological exploration, structural monitoring, and materials research.

[0038] The above technical features constitute various embodiments of the present invention, which have strong adaptability and implementation effect. Unnecessary technical features can be added or removed according to actual needs to meet the needs of different situations.

Claims

1. A vibration generating device for quantitative identification of fracture direction and quantity, characterized in that... It includes a central shaft and a vibration device. Several sets of vibration devices are arranged at intervals on the central shaft. The vibration device includes a vibrating plate, a connecting plate, a rotating wheel, and a driving device. Several vibrating plates are evenly distributed at intervals along the outer circumference of the central shaft. Each vibrating plate is connected to the connecting plate, which is fitted on the outside of the central shaft, through a connector. A rotating wheel is provided on the connecting plate. A driving device is provided on the central shaft below the connecting plate. The driving device is connected to the rotating wheel. The driving device can rotate the rotating wheel to make the vibrating plate reciprocate.

2. The vibration generating device for quantitative identification of fracture direction and quantity according to claim 1, characterized in that... The drive unit includes a motor, a universal joint, a central gear, and side gears. The motor is fixedly mounted on the central shaft. The output shaft of the motor is connected to the central gear. Several side gears mesh around the central gear. Each side gear is connected to the universal joint. The upper end of the universal joint is mounted together with the rotating wheel.

3. The vibration generating device for quantitative identification of fracture direction and quantity according to claim 2, characterized in that... The vibration device also includes a slider. Each connecting plate corresponding to the position of each rotating wheel is provided with a vertically penetrating groove. The slider is slidably mounted on the groove, and the rotating wheel is mounted on the slider.

4. The vibration generating device for quantitative identification of fracture direction and quantity according to claim 3, characterized in that... The vibration device also includes springs, with the inner side of each vibration plate connected to the slider via springs.

5. The vibration generating device for quantitative identification of fracture direction and quantity according to claim 2, 3, or 4, characterized in that... It also includes a fixed cylinder, a guide shaft, and a rotating cylinder. Several guide shafts are evenly distributed around the outer circumference of the central shaft. The lower end of the guide shaft passes through the connecting plate and the motor of each set of vibration devices in sequence. The guide shaft is fixedly connected to the connecting plate and slidably connected to the motor. The upper end of the guide shaft is installed together with the lower side of the fixed cylinder. The lower part of the rotating cylinder is rotatably connected to the fixed cylinder. The rotating cylinder is threadedly connected to the upper end of the central shaft.

6. The vibration generating device for quantitative identification of fracture direction and quantity according to claim 5, characterized in that... It also includes side fixing pins, claws, and a chuck. The chuck is located inside the fixed cylinder. The upper side of the chuck has a threaded groove. Several claws are located along the circumference of the chuck. The bottom of each claw is slidably mounted on the chuck through the groove. A side fixing pin is fixedly installed at the outer end of each claw. The side fixing pin can pass through the fixed cylinder. The lower outer side of the rotating cylinder is fixedly installed together with the chuck.

7. The vibration generating device for quantitative identification of fracture direction and quantity according to claim 1, 2, 3, 4, or 6, characterized in that... A support plate is fixed to the bottom of the central shaft, and a lower fixing nail is installed at the bottom of the support plate.

8. The vibration generating device for quantitative identification of fracture direction and quantity according to claim 5, characterized in that... A support plate is fixed to the bottom of the central shaft, and a lower fixing nail is installed at the bottom of the support plate.

9. A method of using the vibration generating device for quantitative identification of fracture direction and quantity as described in any one of claims 7 or 8, characterized in that... Perform the following steps. Drill a test hole at the geological survey center, place the device into the test hole, and ensure that the lower fixing nail is inserted into the bottom of the test hole and the support plate is in contact with the bottom of the test hole; Rotate the rotating drum to push the fixed drum and guide shaft downwards, adjust the distance between the connecting plate and the motor, and adjust the angle of the universal transmission rod so that each vibrating plate opens and fits against the side wall of the detection hole at the corresponding depth. At the same time, the side fixing nails extend outwards and insert into the circumference of the upper part of the detection hole to fix the device. The corresponding motor is started to make the vibrating plate emit vibration excitation waves to the surrounding rock mass. The frequency and amplitude of the vibration are adjusted by changing the output of the motor to ensure that the vibration signal is carried out in accordance with the predetermined pattern. By using multiple vibrations at different depths, the vibration response inside the rock mass is excited in different depth ranges. During the vibration process, vibration detectors distributed in different directions are used to capture the vibration signals generated by the vibrating plate. The detectors record the vibration response data and transmit it to the data acquisition system. The collected vibration data is analyzed and processed using methods such as frequency domain analysis, time domain analysis, and vibration modal analysis, which can identify abnormal vibration responses and quantify fractures, as well as information about the internal structure of the rock mass and the depth of the fractures. Visualize the identification and analysis results.

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