Fault fracture expansion speed measuring device
By combining a high-speed camera and a hydraulic press with the Brazilian splitting test method, the fault rupture process is directly monitored, which solves the problem of low accuracy in calculating fault propagation rate in existing technologies and achieves high-precision measurement of fault rupture propagation rate.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-27
- Publication Date
- 2026-03-06
AI Technical Summary
Current research on the speed of interruption layer expansion mainly relies on indirect observation methods, resulting in low computational accuracy and poor performance.
The Brazilian fracturing test method was used in conjunction with a high-speed camera, hydraulic press, and positioning transmitter to directly apply fracturing pressure and monitor the fault fracturing process through high-speed photography. Strain gauge sensors were used to precisely trigger recording and obtain direct data.
It enables intuitive and accurate monitoring of fault rupture propagation speed, improving the accuracy and precision of calculations.
Smart Images
Figure CN223977010U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of geological technology, and in particular to a device for measuring the rate of fault rupture propagation. Background Technology
[0002] Research on fault propagation velocity is of great significance for earthquake prediction, geological evolution, energy exploration, and environmental protection. Earthquake disaster prediction and prevention: Fault propagation velocity is one of the important parameters of seismic activity. By studying fault propagation velocity, we can understand the laws and trends of seismic activity, thereby providing a scientific basis for earthquake prediction and prevention.
[0003] Current research on fault propagation rates primarily relies on a combination of methods, including seismology, surface deformation observation, and satellite remote sensing. Seismology infers fault propagation rates by recording the occurrence and propagation of seismic events; surface deformation observation indirectly infers rates by measuring surface deformation; and satellite remote sensing predicts rates by monitoring surface deformation and geomorphological changes. A drawback of existing techniques for studying fault propagation rates is that they rely on indirect observational methods, leading to lower accuracy and less effective calculations.
[0004] Therefore, there is an urgent need for a fault rupture propagation rate measuring device to solve the above-mentioned technical problems. Utility Model Content
[0005] The present invention aims to solve the above-mentioned technical problems, namely, to solve the problem that the existing technology for studying the fault rupture propagation rate uses indirect observation methods to obtain data, resulting in low accuracy and poor effect in calculating the fault propagation rate.
[0006] To this end, the present invention provides a fault fracture propagation velocity measuring device, a high-speed camera, a testing instrument capable of performing Brazilian splitting tests, a positioning transmitter, and a control system. The testing instrument includes a stage, a hydraulic press, and a frame. The hydraulic press is mounted on the frame, and the stage is mounted on the base of the frame. A pressure plate is fixed to the telescopic end of the hydraulic press. Driven by the hydraulic press, the pressure plate can apply fracture pressure to the sample placed on the stage according to the Brazilian splitting test method. The high-speed camera is mounted on the stage in front of the hydraulic press. The positioning transmitter is installed inside the center of the pressure plate and determines the placement position of the sample on the stage by emitting vertical light. The high-speed camera, the positioning transmitter, and the hydraulic press are all connected to the control system.
[0007] In a specific embodiment of the above-mentioned fault fracture propagation rate measuring device, the fault fracture propagation rate measuring device further includes a strain gauge sensor connected to the control system, wherein the strain gauge sensor is attached to one surface of the sample in the use state.
[0008] In a specific embodiment of the fault rupture propagation rate measuring device described above, supplementary lights are fixed on the platforms on both sides of the high-speed camera.
[0009] In a specific embodiment of the fault rupture propagation rate measuring device described above, a mounting hole is provided at the bottom of the central region of the pressure plate, and the positioning transmitter is installed in the mounting hole.
[0010] In a specific embodiment of the fault rupture propagation rate measuring device described above, the positioning transmitter is an infrared transmitter.
[0011] In a specific embodiment of the fault rupture propagation rate measuring device described above, the positioning transmitter is a laser transmitter.
[0012] In a specific embodiment of the fault rupture propagation rate measuring device described above, a tripod is provided on the platform at the front of the hydraulic press, and the high-speed camera is mounted on the tripod.
[0013] Compared with the prior art, the beneficial effects of this utility model are:
[0014] 1. This utility model uses a hydraulic press to drive a pressure plate to apply fracture pressure to the sample, which is the Brazilian wedge test method. This is the pressure application method to induce fracture of the fault sample, causing the sample to fracture directly. At the same time, high-speed photography technology is used to monitor the fracture process of the fault sample. This allows for intuitive and accurate monitoring and recording of the fracture process (i.e., the development and propagation of the fracture). The data obtained is more accurate, which optimizes the current indirect observation and measurement method and improves the accuracy of calculating the fault propagation rate.
[0015] 2. The position of the sample on the stage was calibrated by using the light emitted by the positioning transmitter, which ensured the accuracy of the experiment.
[0016] 3. By using strain gauge sensors to monitor the stress of the sample, a high-speed camera is triggered to start recording when the stress reaches a preset threshold, achieving accurate recording and reducing the recording length, which in turn helps to reduce the amount of subsequent data processing. Attached Figure Description
[0017] The preferred embodiments of this utility model are described below with reference to the accompanying drawings, in which:
[0018] Figure 1 This is a schematic diagram of the structure of the fault fracture propagation rate measuring device provided by this utility model;
[0019] Figure 2 yes Figure 1 Side view;
[0020] Figure 3 It is the mounting position of the strain gauge sensor on the sample.
[0021] List of reference numerals in the attached diagram:
[0022] 1. Stand; 2. Hydraulic press; 3. Pressure plate; 4. Stage; 5. Fill light; 6. High-speed camera; 7. Support rod; 8. Tripod; 9. Strain gauge sensor; 10. Mounting hole; 11. Control system; 12. Sample. Detailed Implementation
[0023] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.
[0024] In the description of this utility model, it should be noted that the terms "upper," "lower," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the system or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the use of terms such as "first" and "second" to define components is merely for the convenience of distinguishing the aforementioned components. Unless otherwise stated, these terms have no special meaning and should not be construed as indicating or implying relative importance.
[0025] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "setting," and "connection" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.
[0026] This utility model relates to the field of geological technology, and in particular to a device for measuring fault rupture propagation velocity. The purpose is to address the problem that existing techniques for studying fault rupture propagation velocity rely on indirect observation methods to obtain data, resulting in low accuracy and poor performance in calculating fault propagation velocity. To this end, the present invention provides a fault fracture propagation rate measuring device, comprising a high-speed camera, a testing instrument capable of performing the Brazilian splitting test, a positioning transmitter, and a control system. The testing instrument includes a stage, a hydraulic press, and a frame. The hydraulic press is mounted on the frame, and the stage is mounted on the base of the frame. A pressure plate is fixed to the telescopic end of the hydraulic press. Driven by the hydraulic press, the pressure plate applies fracture pressure to the sample placed on the stage according to the Brazilian splitting test method. The high-speed camera is mounted on the stage in front of the hydraulic press. The positioning transmitter is installed inside the center of the pressure plate and determines the placement position of the sample on the stage by emitting vertical light. The high-speed camera, the positioning transmitter, and the hydraulic press are all connected to the control system. The present invention uses a hydraulic press to drive the pressure plate to apply fracture pressure to the sample, that is, it applies the Brazilian test method as the pressure application method to form the fracture of the fault sample, thereby realizing the fracture control of larger samples to directly cause breakage. At the same time, high-speed photography technology is used to monitor the fracture process of the fault sample, which intuitively and accurately realizes the monitoring and recording of the fracture process, that is, the data obtained is more accurate, and the accuracy of the calculation of the fault propagation rate is improved.
[0027] The fault fracture propagation rate measuring device provided in the embodiments of this utility model will now be described in detail with reference to the accompanying drawings.
[0028] See Figure 1-2 This utility model provides a fault fracture propagation rate measuring device, including a high-speed camera 6, a testing instrument capable of performing Brazilian splitting tests, a positioning transmitter, and a control system 11. The testing instrument includes a stage 4, a hydraulic press 2, and a frame 1. The hydraulic press 2 is mounted on the frame 1, and the stage 4 is fixed on the base of the frame 1, located below the hydraulic press 2. A pressure plate 3 is fixed to the telescopic end of the hydraulic press 2. Driven by the hydraulic press, the pressure plate can apply a fracture pressure to the sample 12 placed on the stage 4 according to the Brazilian splitting test method. The fracture pressure is perpendicular to the axis of the sample 12. The high-speed camera 6 is mounted on the stage 4 in front of the hydraulic press 2. The positioning transmitter is installed inside the center of the pressure plate 3 and determines the placement position of the sample 12 on the stage 4 by emitting vertical light. The high-speed camera 6, the positioning transmitter, and the hydraulic press 2 are all connected to the control system 11.
[0029] Specifically, sample 12 is a cylinder. The light emitted by the positioning transmitter is perpendicular to the axis of sample 12, i.e., as shown... Figure 1The up-down direction shown indicates the piston extension and retraction direction of the hydraulic press 2. A mounting hole 10 is provided at the bottom of the central area of the pressure plate 3, and the positioning transmitter is installed inside the mounting hole 10. Because it is located inside the mounting hole 10, it will not be pressed and damaged during the experiment. Before the experiment, the center positioning point is pre-marked on the outer circumference of the sample 12. Aligning the light emitted by the positioning transmitter with the center positioning point indicates that the sample 12 is in place.
[0030] In this application, the positioning transmitter is exemplarily an infrared transmitter, but it can also be a laser transmitter.
[0031] In the above embodiment, the hydraulic press 2 drives the pressure plate 3 to move downward to apply a fracturing pressure to the sample 12 below, that is, the Brazilian test method is applied as the pressure method to form the fracture of the fractured sample 12, thereby achieving control over the fracture of a larger sample 12. The control system 11 includes a manual control button and an automatic control button. The manual control button is used to manually control the extension and retraction of the piston of the hydraulic press 2, while the automatic control button is used to trigger the automatic control of the extension and retraction of the piston of the hydraulic press 2. This achieves the purpose of both manual and automatic control.
[0032] In addition, the control system 11 includes a control module and a data processing module. The control module, connected to the high-speed camera 6, controls the starting and stopping of the high-speed camera 6. The data processing module collects and analyzes the recorded data from the high-speed camera 6 to obtain corresponding parameters of the fault splitting propagation characteristics, including the fault splitting propagation velocity. A positioning transmitter is connected to the control module and controls its starting and stopping. This can be done manually via a button, or automatically when the hydraulic press 2 starts and when it stops.
[0033] In order to make the images captured by the high-speed camera 6 clearer, supplementary lights 5 are fixed on the stage 4 on both sides of the high-speed camera 6. The supplementary lights 5 are connected to the control module, which controls the supplementary lights 5 to start when the high-speed camera 6 is started and to turn off when the high-speed camera 6 is turned off.
[0034] In one embodiment, see Figure 3 The fault fracture propagation rate measuring device also includes a strain gauge sensor 9 connected to the control system 11. The strain gauge sensor 9 is attached to one surface of the specimen 12 during use. Since the specimen 12 is cylindrical, the strain gauge sensor 9 is attached to the circular surface of the cylinder during the experiment. The strain gauge sensor 9 monitors the stress in the specimen 12, and when a preset threshold is reached, it triggers the high-speed camera 6 to start recording, achieving accurate recording and reducing the recording length, thereby reducing the amount of subsequent data processing.
[0035] In this application, a tripod 8 is provided on the platform 4 on the front side of the hydraulic press 2, and a high-speed camera 6 is mounted on the tripod 8. Support rods 7 are fixed on the platforms 4 on both sides of the tripod 8, and supplementary lights 5 are mounted on the support rods 7.
[0036] During the experiment, the test specimen 12 is first placed centered on the stage 4, and the center positioning point on the specimen 12 is aligned with the light emitted by the positioning transmitter. This calibrates the center position of the specimen 12. While keeping the position of the specimen 12 unchanged, the hydraulic press 2 is manually operated to adjust the pressing position of the pressure plate 3 to ensure that the specimen 12 is under pressure. At this point, the specimen 12 is released, and the specimen 12 does not move under pressure, indicating that the positioning is complete. Then, the hydraulic press 2 is automatically pressed down by the automatic control button in the control system 11. During the test, the hydraulic press 2 gradually increases the pressure, and the strain gauge sensor 9 monitors the stress and outputs it to the control system 11. The control system 11 judges the stress and the magnitude of the preset threshold. When the pressure is about to reach the maximum bearing capacity of the test specimen 12, i.e., the preset threshold, the control system 11 triggers the high-speed camera 6 to start recording, and at the same time, the supplementary light 5 is turned on, thereby realizing the artificial crack phenomenon. At the same time, the high-speed camera 6 records the crack development morphology and process in high definition. The image data recorded by the high-speed camera 6 is transmitted to the data processing module. The data processing module analyzes the parameters and images during the experiment to obtain the corresponding parameters for studying the fault rupture propagation characteristics.
[0037] This invention employs a fracturing method to directly generate fractures and observe the development and propagation of cracks, thus optimizing the current indirect observation and measurement methods.
[0038] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the protection scope of the technical solutions of the embodiments of this utility model.
Claims
1. A fault rupture propagation velocity measuring apparatus characterized by comprising: The application relates to a device for measuring the rupture propagation speed of a fault, which comprises a high-speed camera, a testing instrument capable of conducting a Brazilian splitting test, a positioning emitter and a control system, wherein the testing instrument comprises a carrier, a hydraulic machine and a rack, the hydraulic machine is installed on the rack, the carrier is installed on the base of the rack, the telescopic end of the hydraulic machine is fixed with a pressing plate, the pressing plate can exert a rupture pressure on a sample placed on the carrier according to the Brazilian splitting test mode under the drive of the hydraulic machine, the high-speed camera is installed on the carrier on the front side of the hydraulic machine, the positioning emitter is installed inside the central part of the pressing plate and determines the placement position of the sample on the carrier through the vertical light emitted by itself, and the high-speed camera, the positioning emitter and the hydraulic machine are connected with the control system.
2. The fault rupture velocity measurement apparatus according to claim 1, wherein The device for measuring the rupture propagation speed of a fault further comprises a strain gauge sensor connected with the control system, and the strain gauge sensor is attached to one surface of the sample in the use state.
3. The fault rupture velocity measurement apparatus of claim 1, wherein, Supplementary light lamps are fixed on the carriers on the two sides of the high-speed camera.
4. The fault rupture velocity measurement apparatus of claim 1, wherein, An installation hole is formed in the bottom of the central area of the pressing plate, and the positioning emitter is installed in the installation hole.
5. The fault rupture velocity measurement apparatus of claim 1, wherein, The positioning emitter is an infrared emitter.
6. The fault rupture velocity measurement apparatus of claim 1, wherein, The positioning emitter is a laser emitter.
7. The fault rupture velocity measurement apparatus of claim 1, wherein, A tripod is arranged on the carrier on the front side of the hydraulic machine, and the high-speed camera is installed on the tripod.