Rock debris image on-line automatic acquisition system

Abstract

The utility model discloses a rock debris image on-line automatic acquisition system, which comprises an explosion-proof box, an upper computer, an image acquisition device, a master control system, and a focusing mechanism, a cleaning mechanism, a white light lamp and a fluorescent lamp assembly which are respectively and electrically connected with the master control system, a glass window is arranged on a bottom plate of the explosion-proof box, and a shading cylinder is arranged at the bottom of the explosion-proof box. The cleaning mechanism comprises an inner wiping rod, an outer wiping rod and a driving mechanism, and the tail end of the inner wiping rod magnetically drives the tail end of the outer wiping rod to move around the rotating center to clean the outer surface of the glass window; the acquisition system can better meet the on-site anti-explosion requirement, the on-line automatic image acquisition operation of mining while drilling of rock debris samples is achieved, the detection condition meeting the detection environment requirement is provided, the lithology can be quickly known on a logging site, and the logging efficiency is improved; and the cleaning mechanism adopts magnetic force to drive an outer wiping rod to rotate, so that the anti-explosion performance of the anti-explosion box is ensured.

Description

Technical Field

[0001] This utility model relates to the technical field of rock cuttings image acquisition equipment, specifically to an online automatic rock cuttings image acquisition system. Background Technology

[0002] Rock cuttings are a direct source of information about formation lithology and oil and gas reservoirs. There are currently two methods for identifying rock cuttings: manual identification and image recognition. Manual identification relies on the visual judgment of logging personnel, which is highly subjective and prone to inaccurate assessment. To isolate the rock cuttings from the external environment, image recognition equipment is typically located in laboratories. Therefore, rock cuttings samples need to be packaged and transported to the laboratory in batches. This method is inefficient and not conducive to real-time monitoring of geological information within the well. Furthermore, the geological information contained in rock cuttings samples stored for extended periods can easily become inaccurate.

[0003] With drilling speeds increasing and cuttings quality improving, current cuttings identification methods are no longer sufficient to meet the needs of drilling projects in order to obtain geological information in real time. There is an urgent need to develop online cuttings image acquisition technology at the logging site in order to obtain geological information inside the well in a timely manner.

[0004] The logging site environment is complex, exposed to wind and sun, and also subject to destructive factors such as flying cuttings. The challenges of carrying out online acquisition technology include: 1. The acquisition equipment is easily damaged; 2. The image acquisition effect is poor due to dust, fog droplets, etc. In order to solve the above problems, it is urgent to develop a "drilling and mining" and explosion-proof rock cuttings image acquisition system to meet the current logging requirements. Utility Model Content

[0005] The purpose of this invention is to provide an online automatic acquisition system for rock cuttings images, thereby overcoming, to at least some extent, one or more problems caused by the limitations and defects of related technologies.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] An online automatic image acquisition system for rock cuttings includes an explosion-proof enclosure, a host computer, an image acquisition device, a central control system, and focusing mechanisms, cleaning mechanisms, white light lamps, and fluorescent lamp assemblies electrically connected to the central control system. The host computer is connected to the central control system, and the image acquisition device is connected to the host computer via wireless and wired communication.

[0008] The top of the explosion-proof box is connected to the mounting plate via shock-absorbing legs at the four corners. A glass window is provided on the bottom plate, and a light-shielding tube is provided at the bottom of the explosion-proof box to create a dark area directly below the box.

[0009] Both the image acquisition device and the focusing mechanism are housed in an explosion-proof box. The image acquisition device is driven by the focusing mechanism to lift and adjust the focus, and its acquisition lens is directly facing the center of the glass window.

[0010] Both the white light and fluorescent light components are located inside the explosion-proof box, and their light provides illumination to the dark areas through the glass window;

[0011] The cleaning mechanism is used to clean glass windows. It includes an inner wiping rod, an outer wiping rod, and a drive mechanism. Both the drive mechanism and the inner wiping rod are located inside an explosion-proof enclosure. The drive mechanism drives the inner wiping rod to swing and clean the inner surface of the glass window. The outer wiping rod is mounted on a pin outside the explosion-proof enclosure, and its rotation center is coaxial with the rotation center of the inner wiping rod. Both the end of the outer wiping rod and the end of the inner wiping rod are fixed with a magnetic block. The end of the inner wiping rod drives the end of the outer wiping rod to move around its rotation center through magnetism, thus cleaning the outer surface of the glass window.

[0012] Furthermore, the root end of the outer wiping rod is rotatably mounted on the outer rivet shaft, which is riveted to the base plate. The inner wiping rod is mounted on the inner rivet shaft, which is rotatably mounted on the shaft seat.

[0013] Furthermore, the drive mechanism includes a cleaning servo, a crankshaft, and a drive connecting rod. The crankshaft, drive connecting rod, and inner wiping rod form a crank-rocker mechanism. The inner wiping rod swings to clean the glass window and drives the outer wiping rod to swing synchronously. The swing cleaning area of ​​both is smaller than the glass window, and the two magnets are always in contact with the inner and outer surfaces of the glass window.

[0014] Furthermore, it also includes a wiping detector connected to the main control system. The wiping detector includes an anchor plate and an anchor body. The anchor plate is fixed to the end of the inner wiping rod, and the anchor body is set at the extreme position of the inner wiping rod.

[0015] Furthermore, white light lamps are arranged in pairs on both sides of the image acquisition device, and their light shines through the glass windows on both sides onto the sample in the dark area. A diffuse reflection film is attached to the light source of the white light lamps.

[0016] Furthermore, the fluorescent lamp assembly includes a fluorescent lamp, an adjustment bracket, and a fluorescent support. The adjustment bracket is installed inside an explosion-proof box and is equipped with angle adjustment ears. The fluorescent lamp is installed on the fluorescent support and is tilted to the side of the image acquisition device. The fluorescent support is supported by the angle adjustment ears and the tilt angle can be adjusted.

[0017] Furthermore, the fluorescent assembly also includes a light shield, which is placed under the fluorescent lamp to block the fluorescent light beam that directly illuminates the glass window and the lens of the image acquisition device. The light shield is connected to the fluorescent bracket and can be rotated to adjust the blocking angle.

[0018] Compared with existing technologies, the online automatic acquisition system for rock cuttings images of this invention has the following advantages:

[0019] This acquisition system houses all relevant components within an explosion-proof enclosure, isolating them from harsh external environments, extending system lifespan, and better meeting on-site explosion-proof requirements. A cleaning mechanism performs online cleaning of the glass viewing window, ensuring the effectiveness of image acquisition and automatically adjusting focus to provide image clarity sufficient for accurate testing. This enables "drilling-as-you-go" online automatic image acquisition of rock cuttings samples and provides testing conditions that meet environmental requirements, facilitating rapid lithological understanding on-site and improving logging efficiency. The cleaning mechanism eliminates the need for a linkage shaft, as this would weaken the explosion-proof performance of the base plate. Instead, a magnetically driven external wiping rod ensures the explosion-proof performance of the enclosure. Attached Figure Description

[0020] Figure 1 The three-dimensional structural diagram of the online image acquisition system of this utility model is disclosed;

[0021] Figure 2 A bottom view of the online image acquisition system of this utility model is disclosed;

[0022] Figure 3 The internal three-dimensional structure diagram of the online image acquisition system of this utility model is disclosed;

[0023] Figure 4 for Figure 3 Assembly structure diagram of the cleaning mechanism;

[0024] Figure 5 for Figure 3 Installation structure diagram of a fluorescent lamp.

[0025] In the diagram: 1. Mounting plate; 2. Shock-absorbing legs; 3. Explosion-proof box; 31. Opening and closing door panel; 32. Glass window; 33. Glass pressure plate; 4. Light shield; 5. Image acquisition device; 51. Mounting bracket; 6. Cleaning mechanism; 61. Cleaning servo; 62. Drive linkage; 63. Inner wiping rod; 64. Magnetic block; 65. Outer wiping rod; 66. Press-fit outer rotating shaft; 67. Rotating shaft seat; 68. Inner rotating shaft; 69. Protective pressure plate; 7. Focusing mechanism; 71. Lifting motor; 72. Drive screw; 8. Wiring detector; 81. Anchor plate; 82. Anchor body; 9. Fluorescent lamp assembly; 91. Adjustment bracket; 92. Fluorescent bracket; 93. Light shield; 10. White light lamp; 11. Wiring terminal; 12. External interface plate. Detailed Implementation

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only the preferred embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present utility model.

[0027] This embodiment provides an online automatic rock cuttings image acquisition system for online acquisition of rock cuttings images at the logging site. The terminal of the acquisition system is set at the logging site. The logging site environment is complex, and the host computer is located in a safe room or far from the site. The explosion-proof box 3 is connected to an external central control system via aviation cables. The central control system, as part of the upstream central control system, is connected to the host computer via RS485. The central control system controls the light source, lifting motor 71, cleaning servo motor 61, and image acquisition device 5 via relay control. The light source, lifting motor 71, and cleaning servo motor 61 are connected to +24V voltage via relay control, and the image acquisition device 5 is connected to +12V voltage via relay control. The image acquisition device 5 communicates with the host computer via both wireless and wired methods. The system includes an explosion-proof box 3, a host computer, image acquisition device 5, a central control system, and a focusing mechanism 7, a cleaning mechanism 6, a white light lamp 10, and a fluorescent lamp assembly 9, all electrically connected to the central control system. Figures 1-5 As shown, where,

[0028] The explosion-proof box 3 is used to protect the acquisition system terminal. It is installed on the logging equipment via the mounting plate 1 on the top. The mounting plate 1 is supported and connected to the explosion-proof box 3 by shock-absorbing legs 2 set at the four corners. The shock-absorbing legs 2 are connected in series with shock-absorbing foot rings and damping shock absorbers. The explosion-proof box 3 is formed by stamping steel plate. It has an openable door 31 plate on the side and a viewing window on its bottom plate. Glass viewing windows 32 are installed through glass pressure plates 33 on both sides. A sealing gasket is set between the glass pressure plate 33 and the viewing window for sealing and buffering. In order to reduce the influence of external light, a light shielding tube 4 is formed by extending down the bottom of the explosion-proof box 3 along the four side box plates to form a dark light area that is conducive to image acquisition directly below the explosion-proof box 3.

[0029] The main bodies of the image acquisition device 5, the focusing mechanism 7, the cleaning mechanism 6, the white light lamp 10, the fluorescent lamp assembly 9, and the wiring terminal 11 are all arranged inside the explosion-proof box 3. The lens of the image acquisition device 5 is located above the middle of the glass window 32. The external interface plate 12 is formed by the recess of the side plate of the explosion-proof box 3, and it is equipped with communication interface and power interface, etc.

[0030] The image acquisition device 5 is mounted on a U-shaped mounting bracket 51. The mounting bracket 51 is connected to the focusing mechanism 7. The focusing mechanism 7 includes a lifting motor 71, a drive gear belt, and a drive screw 72. The drive screw 72 passes through and is threadedly connected to the base plate of the mounting bracket 51. The explosion-proof box 3 is also equipped with a guide rail for the vertical lifting of the base plate of the guide bracket. The lifting motor 71 gently drives the image acquisition device 5 to vertically lift and focus through the drive gear belt.

[0031] Both the white light lamp 10 and the fluorescent lamp assembly 9 are located inside the explosion-proof box 3. (Refer to...) Figure 3 The white light lamp 10 illuminates the light used to provide lithological image acquisition. In order to effectively suppress the water ripples formed between rock fragments and improve the white light wet illumination effect of rock fragments, the white light lamp 10 light source is attached to a fixed diffuse reflection film. The white light lamps 10 are set in pairs on both sides of the image acquisition device 5. After diffuse reflection, their light is transmitted through the glass window 32 to illuminate the sample in the dark area.

[0032] Fluorescent lamp assembly 9 is used to provide light for acquiring images of oily rock cuttings. Due to its high light intensity, it cannot be directly irradiated onto the rock cutting sample. The fluorescent lamp is tilted so that its illumination direction is towards the explosion-proof box 3. In addition, a light shield 93 is installed at the bottom of the fluorescent lamp to block the light, and the reflected light is used to provide imaging light for dark areas. (Refer to...) Figure 5 The fluorescent lamp is mounted on the fluorescent bracket 92, and the adjusting bracket 91 is fixedly installed inside the explosion-proof box 3. The adjusting bracket 91 has two angle adjusting ears, and the fluorescent bracket 92 is mounted on the angle adjusting ears. The angle adjusting ears have arc-shaped waist holes for rotating and adjusting the tilt angle of the fluorescent bracket 92. Since the space inside the explosion-proof box 3 is limited and the tilt adjustment range is limited, a light shield 93 is set for auxiliary shielding. The light shield 93 is connected to the lower end of the fluorescent bracket 92 through connecting ears, and the light shielding angle of the light shield 93 can be rotated, adjusted and fixed. It is used to block the fluorescent beam that directly shines on the glass window 32 and the lens of the image acquisition device 5.

[0033] During the cleaning process of dust and rock cuttings at the logging site, water mist easily adheres to the glass window 32, severely affecting the online image acquisition effect. A cleaning mechanism 6 is installed on the explosion-proof box 3 to clean the glass before each image acquisition. Figure 4As shown, the cleaning mechanism 6 includes an inner wiping rod 63, an outer wiping rod 65, and a drive mechanism. Both the drive mechanism and the inner wiping rod 63 are located inside the explosion-proof enclosure 3. The drive mechanism drives the inner wiping rod 63 to swing and clean the inner surface of the glass window 32. The outer wiping rod 65 is pin-mounted outside the explosion-proof enclosure 3 and is used to wipe the outer surface of the glass window 32. Since the bottom plate of the explosion-proof enclosure 3 is a critical protective surface, its impact resistance requirements are relatively high. The structural design of fixing and driving the outer wiping rod 65 must ensure the strength of the bottom plate. Therefore, the driving mechanism of the outer wiping rod 65... The outer wiping rod 65 is fixed to the base plate by a pin-shaft magnetic drive. The pin is fixed to the base plate and the base plate is interference fit to ensure the overall structural strength of the base plate. The rotation center of the outer wiping rod 65 is coaxial with the rotation center of the inner wiping rod 63. The ends of the outer wiping rod 65 and the inner wiping rod 63 are both fixed with magnetic blocks 64. The magnetic blocks 64 are magnetically attached to the glass surface through the glass. The end of the inner wiping rod 63 drives the end of the outer wiping rod 65 to move around its rotation center through magnetic drive.

[0034] Furthermore, considering the ease of independent disassembly and assembly of the inner wiping rod 63 and the outer wiping rod 65, and the convenience of replacing the wiping strip, the inner wiping rod 63 and the outer wiping rod 65 adopt a concentric but non-axial structural design. (Refer to...) Figure 4 The pin at the root end of the outer wiping rod 65 is a press-fitted outer rotating shaft 66, which is fixed to the base plate by press-fitting. The outer wiping rod 65 is rotatably connected to the press-fitted outer rotating shaft 66. The inner wiping rod 63 is set on the inner rotating shaft 68, which is rotatably set on the rotating shaft seat 67. After the wiping strip is fastened to the outer wiping rod 65, it is further pressed and protected by the protective pressure plate 69 to prevent the wiping strip from loosening.

[0035] Considering the limitations of the magnet's range of motion, the drive mechanism adopts a swing mechanism design, which includes a cleaning servo 61, a crankshaft, and a drive connecting rod 62. The cleaning servo 61 drives the crankshaft to rotate 360°, and the drive connecting rod 62 connects to the middle of the inner wiping rod 63. The crankshaft, drive connecting rod 62, and inner wiping rod 63 form a crank-rocker mechanism. The inner wiping rod 63 swings to clean the glass window 32 and drives the outer wiping rod 65 to swing synchronously and equally. The swing cleaning area of ​​the inner wiping rod 63 should cover the sample shooting area and be smaller than the glass window 32.

[0036] The cleaning operation of the cleaning mechanism 6 is an essential action before image acquisition. The acquisition system detects the action and returns to its original position through the wiping detector 8, which is connected to the main control system. The wiping detector 8 includes an anchor plate 81 and an anchor body 82. After each wiping is completed, the anchor plate 81 is fixed at the end of the inner wiping rod 63, and the anchor body 82 is set at the extreme position on either side of the inner wiping rod 63, that is, the dead point position of the crank rocker mechanism. When the cleaning action is completed, the anchor plate 81 should stop in the anchor body 82. The cleaning mechanism 6 is opened, the anchor plate 81 leaves and returns to the anchor body 82, which is one cleaning action. The arrival signal is fed back to the main control system, the cleaning is stopped and the image acquisition device 5 is started to acquire images.

[0037] As a step in online rock cuttings detection, the online automatic image acquisition system includes the following steps in its image acquisition method:

[0038] S1. Start the host computer to activate the acquisition system. The host computer sends a start acquisition command to the main control system. The upstream main control system starts the previous rock cutting sample preparation process. The rock cutting sample that has been cleaned in the previous process is transported by the robot to the dark area directly below the explosion-proof box 3 to confirm that the rock cutting sample is in place.

[0039] S2. The main control system starts the cleaning mechanism 6 to perform a cleaning action on the inner and outer surfaces of the glass window 32. The wiping detector 8 detects whether the cleaning mechanism 6 has wiped and sends an in place signal to the main control system after wiping is completed, stopping the cleaning action.

[0040] S3. Autofocus: The main control system starts the white light 10. The host computer calls the built-in autofocus program to evaluate the sharpness of the acquired image and sends the corresponding focusing signal to the main control system according to the evaluation result. The focusing mechanism 7 is started to move in a predetermined step size. Based on the comparative analysis of the images acquired on the moving path, the white light image with the best sharpness and its focus coordinates are locked. The host computer records and saves the white light image information with the best sharpness and turns off the white light 10.

[0041] S4. The image acquisition device 5 maintains the focusing coordinates in step S3, turns off the white light lamp 10, turns on the fluorescent lamp, captures a fluorescent image, and sends the fluorescent image information to the host computer for storage.

[0042] Image acquisition also includes debugging operations: visually inspecting the tilt of the fluorescent lamp and adjusting the shading range of the light shield 93, conducting actual shooting for confirmation, and after completing the focusing operation according to steps S1-S3, taking a fluorescent image with the focus coordinates, judging the fluorescent image, and if there are still reflected spots in the fluorescent image, analyzing the position of the spots, and finely adjusting the tilt angle of the fluorescent lamp and the shading angle of the light shield 93 until there are no reflected spots caused by direct illumination of the light source in the fluorescent image.

[0043] The directional terms "inner," "outer," "upper," "lower," "side," and "end" mentioned in this article are used to describe... Figures 1-5 The coordinates or orientations shown are not intended to limit the indicated devices, elements, or components to having a specific orientation or to be constructed and operated in a specific orientation.

[0044] Furthermore, in addition to indicating direction or positional relationship, some of the aforementioned terms may also have other meanings. For example, the terms "above" and "inside" may also be used in certain situations to indicate a certain dependency or connection relationship. Those skilled in the art can understand the specific meaning of these terms in this utility model according to the specific circumstances.

[0045] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A system for online automatic acquisition of a debris image, characterized in that: The explosion-proof box is connected with an installation plate through four shock-absorbing legs on the corners of the top of the explosion-proof box, a glass window is arranged on the bottom plate of the explosion-proof box, and a light-shielding cylinder is arranged on the bottom of the explosion-proof box to form a dark light area below the explosion-proof box. The image acquisition device and the focusing mechanism are arranged in the explosion-proof box, the image acquisition device is driven to lift and focus by the focusing mechanism, and the acquisition lens of the image acquisition device is opposite to the middle part of the glass window. The white light lamp and the fluorescent lamp assembly are arranged in the explosion-proof box, and the light of the two provides light for the sample in the dark light area through the glass window. The cleaning mechanism is used for cleaning the glass window, and the cleaning mechanism comprises an inner wiping rod, an outer wiping rod and a driving mechanism. The root end of the outer wiping rod is rotatably arranged on a press-in outer rotating shaft, the press-in outer rotating shaft is press-in connected with the bottom plate, the inner wiping rod is arranged on an inner rotating shaft, and the inner rotating shaft is rotatably arranged on a rotating shaft seat.

2. The online automatic acquisition system of debris images according to claim 1, characterized in that: The driving mechanism comprises a cleaning steering engine, a crankshaft and a driving connecting rod, the crankshaft, the driving connecting rod and the inner wiping rod form a crank rocker mechanism, the inner wiping rod is swung to clean the glass window, and the outer wiping rod is synchronously swung, and the swinging cleaning areas of the two are smaller than the glass window.

3. The online automatic acquisition system of debris images according to claim 2, characterized in that: The white light lamp is arranged on both sides of the image acquisition device, the light of the white light lamp passes through the two sides of the glass window and irradiates on the sample in the dark light area, and a diffuse reflection film is attached to the light source of the white light lamp.

4. The online automatic acquisition system of debris images according to claim 3, characterized in that: The fluorescent lamp assembly comprises a fluorescent lamp, an adjusting support and a fluorescent support, the adjusting support is arranged in the explosion-proof box and is provided with an angle adjusting lug, the fluorescent lamp is arranged on the fluorescent support and is arranged obliquely beside the image acquisition device, and the fluorescent support is supported and adjusted in an inclined angle by the angle adjusting lug.

5. The online automatic acquisition system of debris images according to claim 1, characterized in that: ​ 6. The online automatic acquisition system of debris images according to claim 1, characterized in that: ​ 7. The online automatic acquisition system of debris images according to claim 6, characterized in that: The fluorescent lamp assembly further comprises a light shield cover, which is arranged at the lower part of the fluorescent lamp and is used for shielding the fluorescent light beams directly irradiating on the glass window and the lens of the image acquisition device, and the light shield cover is connected with the fluorescent lamp support and can be adjusted in rotation to shield the angle.

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