Rock coring device and method for identifying integrity of sample

Abstract

The invention provides a rock coring device and method for identifying sample integrity, and relates to the technical field of engineering exploration, the device comprises a main body rack, a coring assembly, a driving assembly, a detection assembly and a control assembly; the coring assembly and the detection assembly are arranged at the upper end of the interior of the main body rack, the detection assembly is installed on the side portion of the coring assembly, and the input end of the coring assembly is connected with the output end of the driving assembly; the driving assembly drives the coring assembly to do lifting motion and rotation in the main body rack; and the control assembly is arranged in the main body rack, is electrically connected with the detection assembly and is used for receiving a detection signal of the detection assembly on the rock coring state of the coring assembly. The coring state can be efficiently, accurately and automatically identified.

Description

Technical Field

[0001] This invention relates to the technical field of engineering exploration, and in particular to a rock core sampling device and method for identifying sample integrity. Background Technology

[0002] In rock coring operations, accurately obtaining complete rock core samples is the foundation and prerequisite for in-depth understanding of underground geological structures, rock properties, and assessment of engineering geological conditions. It provides an indispensable scientific basis for mineral resource development, foundation design, tunnel construction, and other related work. Therefore, the study of rock coring is of great importance to geological exploration, engineering survey, and other related work.

[0003] Currently, traditional rock coring equipment largely relies on operator experience to judge the coring status. When core fracture occurs, it cannot be detected in a timely and accurate manner. If coring is not stopped promptly, it will not only damage the core sample, affecting subsequent analysis and research, but may also damage the coring equipment, increasing maintenance costs and operation time. Existing technologies disclose some devices that use sensors to monitor the coring process, but these devices mainly focus on monitoring physical quantities such as pressure and vibration. Their accuracy in identifying the specific condition of core fracture is low and cannot meet practical engineering needs. Therefore, there is an urgent need for a coring device that can efficiently and accurately automatically identify the coring status, especially reacting promptly when core fracture occurs. Summary of the Invention

[0004] To address the problem that existing technologies cannot efficiently and accurately identify the coring status automatically, this invention proposes a rock coring device and method for identifying sample integrity, which can efficiently and accurately identify the coring status automatically.

[0005] To achieve the above-mentioned technical effects, the technical solution of the present invention is as follows: A rock coring device for identifying sample integrity includes: a main frame, a coring assembly, a drive assembly, a detection assembly, and a control assembly; The main frame is equipped with the core sampling assembly and the detection assembly at its upper internal end. The detection assembly is mounted on the side of the core sampling assembly. The input end of the core sampling assembly is connected to the output end of the drive assembly. The drive assembly drives the core sampling assembly to move up and down and rotate within the main frame. The control assembly is located inside the main frame and is electrically connected to the detection assembly, receiving the detection signal from the detection assembly regarding the rock core sampling status of the core sampling assembly.

[0006] Preferably, the main frame includes a top plate, several vertical plates, and partitions. The top plate is horizontally fixed to the top of each vertical plate, and the sides of each vertical plate are connected to each other, forming a hollow space with the top plate. The partitions are horizontally arranged in the upper middle part of each vertical plate, dividing the hollow space into upper and lower spaces. The vertical plates and the top plate enclose the hollow space and are separated by partitions, providing reasonable installation space for each component, making the device structure more compact and stable, and facilitating the collaborative work of each component. Preferably, the coring assembly includes a drill rod and a coring cylinder. The upper end of the drill rod is connected to the top plate, and the lower end of the drill rod is connected to the coring cylinder via a transmission connection. The combined design of the drill rod and the coring cylinder simplifies the transmission path and improves the coring efficiency. The connection between the drill rod and the top plate ensures vertical stability, and the connection between the lower end of the drill rod and the coring cylinder effectively transmits rotational power to the coring cylinder, thereby realizing the coring function.

[0007] Preferably, the drive assembly includes a lifting drive structure and a rotating drive structure; The lifting drive structure includes a hydraulic cylinder, a hose, an oil pump, a lifting drive motor, and an oil tank. The lifting drive motor is electrically connected to the oil pump, the input port of the oil pump is connected to the oil tank, and the output port of the oil pump is connected to the hydraulic cylinder through the hose. The rotary drive structure includes a transmission gear and a horizontal drive motor. The horizontal drive motor is mounted above the partition. The transmission rod of the horizontal drive motor is connected to the transmission gear, and the transmission gear meshes with a driven gear disposed on the drill rod.

[0008] Here, the lifting and rotating drive structures of the drive assembly are designed to realize the lifting and rotating movements of the core retrieval assembly, respectively, providing power support for the core retrieval process and meeting different core retrieval requirements.

[0009] Preferably, the detection component includes an ultrasonic transmitter and a sound collector, wherein the ultrasonic transmitter emits ultrasonic waves toward the rock, and the sound collector receives the reflected signals from the rock and transmits them to the control component.

[0010] Here, the detection component uses an ultrasonic transmitter and a sound collector. By emitting ultrasonic waves and receiving reflected signals, it can obtain information related to the rock and the core sampling status, providing data for accurately identifying the core sampling status.

[0011] Preferably, the control component includes an information processor, a switch, and a status indicator light. The information processor is equipped with a sound recognition module and a control module. The input terminal of the sound recognition module is connected to the sound acquisition device, and the output terminal of the sound recognition module is connected to the input terminal of the control module. The output terminal of the control module is connected to the switch, the status indicator light, and the drive component, respectively.

[0012] Here, the information processor of the control component is equipped with a sound recognition module and a control module, which can identify and process the detection signal, and control the switch, status indicator light and drive component according to the result, so as to realize the intelligent control of the device. This invention also proposes a rock core sampling method for identifying sample integrity, comprising: S1. The bottom of the main frame is brought into contact with the rock, and the core extraction assembly is driven by the drive assembly to descend inside the main frame to the rock surface and begin to rotate; S2. Detect the rock core sampling status of the core sampling component using the detection component, and output the detection signal to the control component; S3. The control component is used to identify the detection signal to obtain the identification result of whether the rock core is broken, and the working state of the core sampling component is controlled according to the identification result.

[0013] Preferably, the step of identifying the detection signal using the control component includes: S31. Denoise the detected signal to obtain the denoising result; S32. Perform feature extraction on the noise reduction result to obtain time-domain features, frequency-domain features, and time-frequency-domain features; S33. Input the time-domain features, frequency-domain features, and time-frequency-domain features into a pre-trained support vector machine model, and have the support vector machine model output the identification result of whether the rock core is fractured.

[0014] Here, denoising and feature extraction of the detection signal, followed by inputting it into a pre-trained support vector machine model for recognition, can improve the accuracy of the recognition results and more reliably determine whether the rock core is fractured.

[0015] Preferably, the noise reduction of the detection signal includes: S311. Input the detection signal into a digital bandpass filter, use the digital bandpass filter to filter out low-frequency mechanical noise and high-frequency environmental interference of the detection signal, and output a filtered signal; S312. Perform wavelet denoising on the filtered signal to separate and suppress the stationary background noise of the filtered signal, retain the transient signal components with impulse characteristics in the filtered signal, and output the denoising result.

[0016] Here, a combination of digital bandpass filter and wavelet denoising is used to effectively filter out noise in the detection signal, retain useful signal components, improve signal quality, and ensure accurate identification.

[0017] Preferably, controlling the working state of the core extraction component based on the identification result includes: If the identification result is that the core is fractured, the control component sends a first control signal to the drive component, and the drive component stops the rotation of the core sampling component after receiving the first control signal. If the identification result indicates that the core sample is not broken, the control component sends a second control signal to the drive component. After receiving the second control signal, the drive component maintains the rotation of the core sampling component.

[0018] Here, the working state of the coring component is controlled according to different identification results. When the rock core breaks, the rotation stops to avoid invalid operation and equipment damage; when it does not break, the rotation is maintained to ensure the continuity of coring and improve the efficiency and quality of coring.

[0019] Compared with the prior art, the beneficial effects of the technical solution of the present invention are: This invention proposes a rock coring device and method for identifying sample integrity. The device includes a main frame, a coring assembly, a drive assembly, a detection assembly, and a control assembly. First, the drive assembly drives the coring assembly to move up and down and rotate within the main frame, achieving independent and precise control of the lifting and rotation movements. Then, the detection assembly detects the rock coring status, enabling the assessment of the rock's internal integrity before coring. This automatic judgment of core integrity avoids ineffective or destructive coring of severely damaged rock masses, significantly reducing the need for manual intervention and improving the efficiency and quality of automated operations. Next, the control assembly identifies the detection signals to determine whether the core is fractured. Based on the identification result, the working state of the coring assembly is controlled, ensuring high accuracy and reliability in rock assessment and core fracture identification. Attached Figure Description

[0020] Figure 1 A structural diagram showing a rock core sampling device for identifying sample integrity proposed in an embodiment of the present invention; Figure 2 This diagram shows the structure of the main frame proposed in the embodiments of the present invention. Figure 3 This diagram illustrates the structure of the core extraction assembly proposed in this embodiment of the invention. Figure 4 This diagram illustrates the structure of the lifting drive structure in the drive assembly proposed in this embodiment of the invention. Figure 5 A structural diagram showing the rotation drive structure in the drive assembly proposed in this embodiment of the invention; Figure 6 This diagram illustrates the structure of the detection component proposed in this embodiment of the invention. Figure 7 This diagram illustrates the structure of the control component in an embodiment of the present invention. Figure 8 This diagram illustrates the structure of the information processor in an embodiment of the present invention. Figure 9 A flowchart illustrating a rock core sampling method for identifying sample integrity proposed in an embodiment of the present invention; 1. Main frame; 11. Top plate; 12. Vertical plate; 13. Partition plate; 2. Core sampling assembly; 201. Drill rod; 202. Core cylinder; 3. Drive assembly; 31. Lifting drive structure; 311. Hydraulic cylinder; 312. Hoses; 313. Oil pump; 314. Lifting drive motor; 315. Oil tank; 32. Rotation drive structure; 321. Transmission gear; 322. Horizontal drive motor; 4. Detection assembly; 401. Ultrasonic transmitter; 402. Sound collector; 5. Control assembly; 51. Information processor; 52. Switch; 53. Status indicator light. Detailed Implementation

[0021] The accompanying drawings are for illustrative purposes only and should not be construed as limiting the scope of this patent. It is understandable to those skilled in the art that some well-known details may be omitted from the accompanying drawings; The technical solution of the present invention will be further described below with reference to the accompanying drawings and embodiments.

[0022] Example 1 like Figure 1 As shown in the figure, this embodiment proposes a rock core sampling device for identifying sample integrity, including: a main frame 1, a core sampling assembly 2, a drive assembly 3, a detection assembly 4, and a control assembly 5; The main frame 1 is equipped with the core sampling assembly 2 and the detection assembly 4 at its upper internal end. The detection assembly 4 is installed on the side of the core sampling assembly 2. The input end of the core sampling assembly 2 is connected to the output end of the drive assembly 3. The drive assembly 3 drives the core sampling assembly 2 to move up and down and rotate inside the main frame 1. The control assembly 5 is located inside the main frame 1 and is electrically connected to the detection assembly 4. It receives the detection signal from the detection assembly 4 indicating the rock core sampling status of the core sampling assembly 2.

[0023] See Figure 2 The main frame 1 includes a top plate 11, four upright plates 12 and a partition 13. The four upright plates 12 are vertically arranged to form the main support frame of the device. The top plate 11 is horizontally fixed to the top of each upright plate 12. The sides of each upright plate 12 are connected to each other and form a hollow space with the top plate 11. The partition 13 is horizontally arranged in the upper middle part of each upright plate 12, dividing the hollow space into upper and lower spaces.

[0024] See Figure 3The core sampling assembly 2 includes a drill rod 201 and a core sampling cylinder 202. The upper end of the drill rod 201 is connected to the top plate 11, and the lower end of the drill rod 201 is connected to the core sampling cylinder 202 for driving the core sampling cylinder 202 to rotate and drill into the rock, thereby realizing the rotary drilling function.

[0025] The drive assembly 3 includes a lifting drive structure 31 and a rotating drive structure 32; See Figure 4 The lifting drive structure 31 includes a hydraulic cylinder 311, a hose 312, an oil pump 313, a lifting drive motor 314, and an oil tank 315. The lifting drive motor 314 is electrically connected to the oil pump 313. The input port of the oil pump 313 is connected to the oil tank 315. The oil tank 315 is located next to the main frame 1. The oil pump 313 is installed above the oil tank 315. The output port of the oil pump 313 is connected to the hydraulic cylinder 311 through the hose 312. The lifting drive motor 314 drives the oil pump 313 to work. The oil pump 313 draws hydraulic oil from the oil tank 315 and drives the hydraulic cylinder 311 to extend and retract through the hose 312, thereby controlling the lifting and lowering motion of the core extraction component 2 and thus precisely controlling the core extraction depth. See Figure 5 The rotary drive structure 32 includes a transmission gear 321 and a horizontal drive motor 322. The horizontal drive motor 322 is mounted above the partition 13. The transmission rod of the horizontal drive motor 322 is connected to the transmission gear 321. The transmission gear 321 meshes with a driven gear disposed on the drill rod 201. The transmission gear 321 is in a transmission cooperation with the drill rod 201 to provide rotational power for transmitting the rotational power of the horizontal drive motor 322 to the drill rod.

[0026] In this embodiment, the core sampling assembly is first driven by a drive component to move up and down and rotate within the main frame, achieving independent and precise control of the lifting and rotating movements. Then, a detection component is used to detect the rock core sampling status. This detection component allows for the assessment of the rock's internal integrity before core sampling, automatically judging the integrity of the core and avoiding ineffective or destructive core sampling of severely damaged rock masses, greatly reducing the need for manual intervention and improving the efficiency and quality of automated operations. Next, the control component identifies the detection signals to obtain a result indicating whether the core is fractured. Based on this result, the working state of the core sampling assembly is controlled, ensuring high accuracy and reliability in rock assessment and core fracture identification.

[0027] Example 2 See Figure 6The detection component 4 includes an ultrasonic transmitter 401 and a sound collector 402. The ultrasonic transmitter 401 emits ultrasonic waves towards the rock, and the sound collector 402 receives the reflected signals from the rock and transmits them to the control component 5. The specific working principle is as follows: The ultrasonic transmitter 401 is used to emit ultrasonic signals to the target rock before the coring operation begins; the sound collector 402 is used to receive the reflected signals of the ultrasonic waves and transmit the reflected signals to the control component 5 for assessing whether there is serious damage to the internal structure of the rock; during the coring process, the sound collector 402 continuously collects the sound signals generated by the interaction between the coring cylinder and the rock as detection signals and transmits the detection signals to the control component 5. See Figure 7 The control component 5 includes an information processor 51, a switch 52, and a status indicator light 53; see also Figure 8 The information processor 51 is equipped with a sound recognition module and a control module. The input end of the sound recognition module is connected to the sound collector 402, and the output end of the sound recognition module is connected to the input end of the control module. The output end of the control module is connected to the switch 52, the status indicator light 53 and the drive component 3 respectively.

[0028] The information processor 51 and switch 52 are mounted above the partition 13; the sound recognition module is built into the information processor 51; the control module is used to control the operating status of the drive component 3 according to the recognition result; the status indicator light 53 is used to display the current status of the core extraction device; the switch 52 is used to manually control the start, stop and reset of the device; Furthermore, to cope with the complex noise environment at the coring site and to achieve rock assessment and condition identification, the sound recognition module performs the following processing on the detection signals collected by the sound acquisition unit 402: For ultrasonic signals before coring, analyze their propagation characteristics, assess the internal integrity of the rock, and determine whether coring is suitable. The following processing steps are performed on the audio signals during the core extraction process: a) Signal preprocessing and noise reduction: A digital bandpass filter is used to remove low-frequency mechanical noise and high-frequency environmental interference; then, a wavelet noise reduction algorithm is used to separate and suppress stationary background noise, retain transient signal components with impulse characteristics, and improve the signal-to-noise ratio. b) Feature extraction: Extract time-domain features, frequency-domain features, and time-frequency-domain features from the denoised signal to form a feature vector representing the current core state; the time-domain features include short-time energy and zero-crossing rate, and the frequency-domain features include Mel-frequency cepstral coefficients and spectral centroid; c) State Recognition: The extracted features are classified using a trained support vector machine model. During the training phase, the model has learned the sound patterns of normal core sampling and core fracture, enabling it to identify fracture features in real-time streaming and output the recognition results.

[0029] Furthermore, before coring, if the control module determines, based on ultrasonic signal analysis, that the rock is severely damaged and unsuitable for coring, it will indicate "Rock damaged, not suitable for coring" via status indicator 53, and users can choose not to start or interrupt the start process. During coring, when the characteristics of rock core fracture are detected, the control module immediately sends a stop command to the horizontal drive motor 322 and the lifting drive motor 314 in the drive assembly 3. The motors stop running, and the drill rod 201 and the core cylinder 202 stop rotating and lifting. At the same time, the status indicator 53 indicates to the user that the current status is "rock core fracture".

[0030] The rock coring process of the device proposed in this embodiment is as follows: During operation, the operator first activates the device's pre-inspection mode via switch 52. The ultrasonic transmitter 401 and sound collector 402 then operate to assess rock integrity. If the status indicator 53 displays "Suitable for coring," the operator can initiate the coring mode. The horizontal drive motor 322 drives the drill rod 201 and core cylinder 202 to rotate and drill forward via transmission gear 321. Simultaneously, the lifting drive motor 314 drives the oil pump 313, controlling the hydraulic cylinder 311 to gradually lower the core assembly 2. The sound collector 402 collects drilling sounds in real time and transmits them to the information processor 51 for feature recognition. Once the characteristic sound of core fracture is detected, the control module immediately issues a command to stop the horizontal drive motor 322 and the lifting drive motor 314, and displays the current status via the status indicator 53, facilitating operator operation and subsequent processing.

[0031] In this embodiment, firstly, by introducing an ultrasonic pre-detection function, the internal integrity of the rock can be assessed before coring, avoiding ineffective or destructive coring of severely damaged rock masses, thus improving operational efficiency and quality. Secondly, through real-time sound signal monitoring and intelligent recognition technology, automatic judgment of rock core integrity is achieved, greatly reducing the need for manual intervention and improving the degree of automation. Furthermore, advanced signal processing algorithms, including digital filtering and wavelet denoising algorithms, are employed to overcome interference from complex noise environments on-site, ensuring high accuracy and reliability in rock assessment and rock core fracture identification. Additionally, the device proposed in this embodiment has a reasonable structural design, and the dual-motor design of the drive component enables independent and precise control of lifting and rotational movements. Moreover, the device in this embodiment has a status indication function, providing operators with clear pre-detection results and real-time operating information, facilitating timely understanding of rock and coring status and enabling appropriate measures to be taken.

[0032] Example 3 See Figure 9 This embodiment proposes a rock core sampling method for identifying sample integrity, including: S1. The bottom of the main frame 1 is brought into contact with the rock, and the core extraction assembly 2 is driven by the drive assembly 3 to descend inside the main frame 1 to the rock surface and begin to rotate; S2. The detection component 4 is used to detect the rock core sampling status of the core sampling component 2, and the detection signal is output to the control component 5; S3. The control component 5 is used to identify the detection signal to obtain the identification result of whether the rock core is broken, and the working state of the core sampling component 2 is controlled according to the identification result.

[0033] The step of using the control component 5 to identify the detection signal includes: S31. Denoise the detected signal to obtain the denoising result; The noise reduction of the detected signal includes: S311. Input the detection signal into a digital bandpass filter, use the digital bandpass filter to filter out low-frequency mechanical noise and high-frequency environmental interference of the detection signal, and output a filtered signal; S312. Perform wavelet denoising on the filtered signal to separate and suppress the stationary background noise of the filtered signal, retain the transient signal components with impulse characteristics in the filtered signal, and output the denoising result.

[0034] S32. Perform feature extraction on the noise reduction result to obtain time-domain features, frequency-domain features, and time-frequency-domain features; S33. Input the time-domain features, frequency-domain features, and time-frequency-domain features into a pre-trained support vector machine model, and have the support vector machine model output the identification result of whether the rock core is fractured.

[0035] The step of controlling the working state of the core extraction component 2 based on the identification result includes: If the identification result is that the core is broken, the control component 5 sends a first control signal to the drive component 3. After receiving the first control signal, the drive component 3 stops the rotation of the core sampling component 2. If the identification result indicates that the core is not broken, the control component 5 sends a second control signal to the drive component 3. After receiving the second control signal, the drive component 3 maintains the rotation of the core sampling component 2.

[0036] In this embodiment, the core sampling assembly is first driven by a drive component to move up and down and rotate within the main frame, achieving independent and precise control of the lifting and rotating movements. Then, a detection component is used to detect the rock core sampling status. This detection component allows for the assessment of the rock's internal integrity before core sampling, automatically judging the integrity of the core and avoiding ineffective or destructive core sampling of severely damaged rock masses, greatly reducing the need for manual intervention and improving the efficiency and quality of automated operations. Next, the control component identifies the detection signals to obtain a result indicating whether the core is fractured. Based on this result, the working state of the core sampling assembly is controlled, ensuring high accuracy and reliability in rock assessment and core fracture identification.

[0037] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the implementation of the present invention. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the claims of the present invention.

Claims

1. A rock core sampling device for identifying sample integrity, characterized in that, include: The main frame (1), the core sampling assembly (2), the drive assembly (3), the detection assembly (4), and the control assembly (5); The main frame (1) is equipped with the core sampling component (2) and the detection component (4) at the upper part of the interior. The detection component (4) is installed on the side of the core sampling component (2). The input end of the core sampling component (2) is connected to the output end of the drive component (3). The drive component (3) drives the core sampling component (2) to move up and down and rotate inside the main frame (1). The control component (5) is located inside the main frame (1) and is electrically connected to the detection component (4). It receives the detection signal from the detection component (4) on the rock core sampling status of the core sampling component (2).

2. The rock core sampling device for identifying sample integrity according to claim 1, characterized in that, The main frame (1) includes a top plate (11), several vertical plates (12) and partitions (13). The top plate (11) is horizontally fixed to the top of each vertical plate (12). The sides of each vertical plate (12) are connected to each other and form a hollow space with the top plate (11). The partitions (13) are horizontally arranged in the upper middle part of each vertical plate (12) and divide the hollow space into upper and lower spaces.

3. The rock core sampling device for identifying sample integrity according to claim 2, characterized in that, The core sampling assembly (2) includes a drill rod (201) and a core sampling cylinder (202). The upper end of the drill rod (201) is connected to the top plate (11), and the lower end of the drill rod (201) is connected to the core sampling cylinder (202) in a transmission connection.

4. The rock core sampling device for identifying sample integrity according to claim 3, characterized in that, The drive assembly (3) includes a lifting drive structure (31) and a rotating drive structure (32). The lifting drive structure (31) includes a hydraulic cylinder (311), a hose (312), an oil pump (313), a lifting drive motor (314), and an oil tank (315). The lifting drive motor (314) is electrically connected to the oil pump (313). The input port of the oil pump (313) is connected to the oil tank (315). The output port of the oil pump (313) is connected to the hydraulic cylinder (311) through the hose (312). The rotary drive structure (32) includes a transmission gear (321) and a horizontal drive motor (322). The horizontal drive motor (322) is mounted above the partition (13). The transmission rod of the horizontal drive motor (322) is connected to the transmission gear (321). The transmission gear (321) meshes with the driven gear set on the drill rod (201).

5. The rock core sampling device for identifying sample integrity according to any one of claims 1-4, characterized in that, The detection component (4) includes an ultrasonic transmitter (401) and a sound collector (402). The ultrasonic transmitter (401) emits ultrasonic waves toward the rock, and the sound collector (402) receives the reflected signals from the rock and transmits them to the control component (5).

6. The rock core sampling device for identifying sample integrity according to claim 5, characterized in that, The control component (5) includes an information processor (51), a switch (52) and a status indicator (53). The information processor (51) is equipped with a sound recognition module and a control module. The input end of the sound recognition module is connected to the sound collector (402), and the output end of the sound recognition module is connected to the input end of the control module. The output end of the control module is connected to the switch (52), the status indicator (53) and the drive component (3) respectively.

7. A rock core sampling method for identifying sample integrity, characterized in that, include: S1. The bottom of the main frame (1) is brought into contact with the rock, and the core extraction assembly (2) is driven by the drive assembly (3) to descend inside the main frame (1) to the rock surface and begin to rotate; S2. Use the detection component (4) to detect the rock core state of the core sampling component (2) and output the detection signal to the control component (5). S3. The control component (5) is used to identify the detection signal to obtain the identification result of whether the core is broken, and the working state of the core sampling component (2) is controlled according to the identification result.

8. The rock core sampling method for identifying sample integrity according to claim 7, characterized in that, The process of identifying the detection signal using the control component (5) includes: S31. Denoise the detected signal to obtain the denoising result; S32. Perform feature extraction on the noise reduction result to obtain time-domain features, frequency-domain features, and time-frequency-domain features; S33. Input the time-domain features, frequency-domain features, and time-frequency-domain features into a pre-trained support vector machine model, and have the support vector machine model output the identification result of whether the rock core is fractured.

9. The rock core sampling method for identifying sample integrity according to claim 8, characterized in that, The noise reduction of the detected signal includes: S311. Input the detection signal into a digital bandpass filter, use the digital bandpass filter to filter out low-frequency mechanical noise and high-frequency environmental interference of the detection signal, and output a filtered signal; S312. Perform wavelet denoising on the filtered signal to separate and suppress the stationary background noise of the filtered signal, retain the transient signal components with impulse characteristics in the filtered signal, and output the denoising result.

10. The rock core sampling method for identifying sample integrity according to any one of claims 7-9, characterized in that, The step of controlling the working state of the core extraction component (2) based on the identification result includes: If the identification result is that the core is broken, the control component (5) sends a first control signal to the drive component (3). After receiving the first control signal, the drive component (3) stops the rotation of the core sampling component (2). If the identification result is that the core is not broken, the control component (5) sends a second control signal to the drive component (3). After receiving the second control signal, the drive component (3) maintains the rotation of the core sampling component (2).

Images