A multi-surface adjustment type spectral logging device

Abstract

The application discloses a multi-surface adjusting type spectral logging device, relates to the technical field of spectral logging, and comprises a base, a wellhead pulley, a motor, a rotating disc, a connecting wire, a computer and a logging unit; the logging unit comprises a glass cylinder, a spectral detector, a wide-angle lens, a light source, a light shielding plate and a filter body, and in-situ spectral information of a borehole wall is acquired through a direct observation mode; the multi-surface adjusting type spectral logging device can realize the technical effects of eliminating a reflected light path, reducing light loss, improving the authenticity of a spectral signal, dynamically adjusting a light shielding range, adapting to multi-scene measurement requirements, improving light energy utilization and detail capturing capability, balancing light flux and anti-interference through integration of a light path, and improving spectral resolution.

Description

Technical Field

[0001] This invention relates to the field of spectral logging technology, and more particularly to a multi-faceted adjustable spectral logging device. Background Technology

[0002] Rock mass structure and rock composition are the "geological genes" of mining engineering, and their heterogeneity determines the stability and safety of mining operations. Existing detection methods include geological surveys, geophysical exploration, and core drilling, but the structural surfaces and ore-bearing layers exposed at the surface outcrops or artificial excavation faces are limited and easily affected by weathering and rainwater erosion, making it difficult to truly reflect the heterogeneity of the internal structure and mineral distribution of the rock mass.

[0003] For spectral logging technology, traditional detection methods mainly rely on surface outcrops or coring, which are susceptible to weathering and fail to reflect the true characteristics of deep wells. In-situ measurements are required through geological boreholes. In-situ measurements of the borehole walls of geological boreholes mainly rely on panoramic imaging and spectral technology. Panoramic imaging often uses fisheye lens distortion correction or conical mirror schemes, while spectral detection relies on filter spectral dispersion.

[0004] In spectral detection, conical mirror reflection optical paths are often used. Although they can achieve 360° observation, they have the following drawbacks: First, conical mirror reflection introduces stray light and light loss, reducing the authenticity of the spectral signal; second, they rely on precision reflection structures and are easily affected by vibration; third, fixed light-shielding designs cannot adapt to different apertures and measurement scenarios (such as fine small spots / general survey large spots), resulting in low light energy utilization and insufficient detail capture capability. At the same time, in existing filter solutions, rotating filters are only suitable for a limited number of wavelengths and are prone to imaging misalignment due to mechanical rotation; acousto-optic tunable filters are expensive and bulky, and neither is suitable for the narrow space of boreholes; while linear gradient filters have a compact structure, traditional fixed optical paths make it difficult to balance light flux and anti-interference, greatly reducing the effectiveness of spectral logging. Summary of the Invention

[0005] This application provides a multi-faceted adjustable spectral logging device, which solves the technical problems in the prior art, such as the easy introduction of stray light and light loss leading to a decrease in the authenticity of the spectral signal when using conical mirror reflection, the susceptibility of precision reflection structure to vibration interference causing optical path instability, the inability of fixed shading methods to adapt to different apertures, the easy occurrence of imaging misalignment due to mechanical rotation of rotating filters, and the difficulty of balancing light flux and anti-interference in traditional fixed optical paths. It achieves the technical effects of eliminating reflected light paths to reduce light loss and improve the authenticity of spectral signals, dynamically adjustable shading range to adapt to the measurement needs of multiple scenarios, improving light energy utilization and detail capture capabilities, integrating optical paths to balance light flux and anti-interference, and improving spectral resolution.

[0006] This application provides a multi-faceted adjustable spectral logging device, including a base, wellhead pulley, motor, turntable, connecting line, computer and logging unit; The logging unit includes a glass tube, a spectral detector, a wide-angle lens, a light source, a light shield, and a filter body, which acquires in-situ spectral information of the borehole wall through direct observation. The glass tube is a cylindrical transparent shell, fixed to the end of the connecting line; the spectrometer is fixed to the top inside the glass tube; the wide-angle lens is fixed to the middle of the bottom surface of the spectrometer by a fixing post and electrically connected to it; the light source is a ring structure, surrounding the outside of the spectrometer and fixed to the top inside the glass tube; the light shield is fixed below the spectrometer and surrounds the outside of the wide-angle lens; multiple filters are provided, arranged in a ring array, located inside the glass tube and surrounding the outside of the wide-angle lens, and arranged parallel to the aperture wall.

[0007] Furthermore, the base is a steel cuboid structure, placed horizontally on the ground; the wellhead pulley is fixed to the ground by a bracket and located above the borehole opening; the motor is fixed to the ground, and its output shaft is rotatably connected to the turntable to drive the turntable to rotate and retract the connecting line; one end of the connecting line is wound around the turntable, and the other end passes through the wellhead pulley and connects to the logging unit; the computer, motor, and logging unit are electrically connected to control the logging process and receive data.

[0008] Furthermore, the spectral detector, wide-angle lens, light source, light shield, and filter body are all arranged coaxially with the central axis of the glass tube.

[0009] Furthermore, the optical axis of the wide-angle lens coincides with the axis of the glass tube, and the field of view covers a 360° aperture wall range, enabling the spectral detector to directly acquire the aperture wall reflected light signal after the light is split by the filter body.

[0010] Furthermore, the light source adopts a ring-shaped broadband light source with its light emission direction facing the hole wall; the filter body adopts a linear gradient filter structure with its center wavelength changing linearly along the radial or axial direction.

[0011] Furthermore, the light-blocking plate is made of matte black material, and its inner diameter is larger than the outer diameter of the ring structure formed by the filter body, in order to block direct light from the light source from entering the wide-angle lens.

[0012] Furthermore, the light-blocking plate includes a fixing ring, a support rod, a connecting cloth, an adjusting rod, and a moving ring; The fixing ring is fixed to the bottom of the spectral detector; multiple support rods are provided and evenly arranged along the circumference of the fixing ring, one end of which is hinged to the bottom of the fixing ring, and the other end is an elastic rod structure that flexibly fits against the inner wall of the glass tube; the connecting cloth is made of a flexible material with elastic properties, has a conical surface structure, and is fixed to the support rod. Multiple adjusting rods are provided, each corresponding to a support rod. One end of the adjusting rod is hinged to the support rod, and the other end is hinged to a movable ring. The movable ring is slidably connected to the fixed column via an electric slider. By moving the movable ring up and down, the support rod and connecting cloth are extended or retracted, thereby achieving adjustable shading range.

[0013] Furthermore, the reflected light formed by the light source directly illuminating the hole wall is directly imaged onto the spectral detector through the filter body and wide-angle lens.

[0014] One or more technical solutions provided in this application have at least the following technical effects or advantages: Direct observation is employed for spectral logging. A glass tube serves as a transparent pressure-bearing shell, providing downhole protection for internal optical components and ensuring a stable working environment within the drilling fluid. A movable ring within a light-shielding plate moves up and down along a fixed column, extending or retracting the support rod and connecting fabric. Combined with the direct observation optical path design, this allows for dynamic adjustment of the light-shielding range, adapting to different apertures and measurement scenarios. The light source directly illuminates the borehole wall, and after linear spectral dispersion by a filter, the reflected light from the borehole wall is directly observed by a wide-angle lens and imaged onto the spectral detector, eliminating the conical mirror reflection stage and significantly reducing light loss and stray light interference. The coaxial integration of the spectral detector, wide-angle lens, and filter simplifies the non-reflective structure, relying on direct observation... The observation method improves seismic stability and spectral resolution, ensuring the authenticity and integrity of in-situ spectral information. It effectively solves the technical problems in existing technologies, such as the introduction of stray light and light loss leading to reduced spectral signal authenticity when using conical mirror reflection, the susceptibility of precision reflection structures to vibration interference causing optical path instability, the inability of fixed shading methods to adapt to different apertures, the mechanical rotation of rotating filters causing imaging misalignment, and the difficulty of balancing light flux and anti-interference in traditional fixed optical paths. It achieves the technical effects of eliminating reflected light paths to reduce light loss and improve spectral signal authenticity, dynamically adjustable shading range to adapt to the measurement needs of multiple scenarios, improved light energy utilization and detail capture capabilities, integrated optical path to balance light flux and anti-interference, and improved spectral resolution. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of a multi-faceted adjustable spectral logging device according to the present invention.

[0016] Figure 2 This is a schematic diagram of the logging unit of a multi-faceted adjustable spectral logging device according to the present invention.

[0017] Figure 3 This is a longitudinal full sectional view of the logging unit of a multi-faceted adjustable spectral logging device according to the present invention.

[0018] Figure 4This is a cross-sectional view of the light-shielding plate of a multi-faceted adjustable spectral logging device according to the present invention.

[0019] Figure 5 This is a lateral profile optical path diagram of the logging unit of a multi-faceted adjustable spectral logging device of the present invention during logging.

[0020] In the diagram: 100, base; 110, wellhead pulley; 120, motor; 130, turntable; 131, connecting line; 140, computer; 200, logging unit; 210, glass tube; 220, spectrometer; 230, wide-angle lens; 231, fixing column; 240, light source; 250, light shield; 251, fixing ring; 252, support rod; 253, connecting cloth; 254, adjusting rod; 255, moving ring; 260, filter body. Detailed Implementation

[0021] To facilitate understanding of the present invention, a more complete description of this application will be given below with reference to the accompanying drawings, which illustrate preferred embodiments of the invention. However, the invention can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to enable a more thorough and complete understanding of the disclosure of the present invention.

[0022] It should be noted that the terms "vertical," "horizontal," "up," "down," "left," "right," and similar expressions used in this article are for illustrative purposes only and do not represent the only possible implementation.

[0023] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains; the terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to limit the invention; the term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0024] Example 1: As Figures 1 to 3 As shown, this application discloses a multi-faceted adjustable spectral logging device, which includes a base 100, a wellhead pulley 110, a motor 120, a turntable 130, a connecting line 131, a computer 140, and a logging unit 200. The logging unit 200 includes a glass tube 210, a spectral detector 220, a wide-angle lens 230, a light source 240, a light shield 250, and a filter body 260, which acquires in-situ spectral information of the borehole wall through direct observation. The glass tube 210 is a cylindrical transparent shell, fixed to the end of the connecting line 131; the spectrometer 220 is fixed inside the top of the glass tube 210; the wide-angle lens 230 is fixed to the middle of the bottom surface of the spectrometer 220 by a fixing post 231 and is electrically connected to it; the light source 240 is a ring structure, surrounding the outside of the spectrometer 220 and fixed inside the top of the glass tube 210; the light shield 250 is fixed below the spectrometer 220 and surrounds the outside of the wide-angle lens 230; multiple filter bodies 260 are provided, arranged in a ring array, located inside the glass tube 210 and surrounding the outside of the wide-angle lens 230, and arranged parallel to the aperture wall.

[0025] This application employs a direct observation method for spectral logging. Specifically, it utilizes the coaxial integration of a spectral detector 220, a wide-angle lens 230, a light source 240, and a filter body 260. The light source 240 directly illuminates the borehole wall, and the reflected light from the borehole wall is split by the filter body 260. The wide-angle lens 230 then directly acquires the reflected light, creating a reflection-free optical path for the spectral detector 220. This eliminates the reflection stage of the conical mirror and solves the stray light interference (such as mirror ghosting and coating scattering) and light loss problems introduced by reflection in conical mirror spectral logging, ensuring the authenticity and integrity of the in-situ spectral signal.

[0026] like Figure 1 As shown, the base 100 is a steel cuboid structure, placed horizontally on the ground; the wellhead pulley 110 is fixed to the ground by a bracket and located above the borehole opening; the motor 120 is fixed to the ground, and its output shaft is rotatably connected to the turntable 130 to drive the turntable 130 to rotate and retract the connecting cable 131; one end of the connecting cable 131 is wound around the turntable 130, and the other end passes through the wellhead pulley 110 and is connected to the logging unit 200; the computer 140, the motor 120, and the logging unit 200 are electrically connected to control the logging process and receive data.

[0027] like Figure 2 and Figure 3 As shown, the spectral detector 220, wide-angle lens 230, light source 240, light shield 250 and filter body 260 are all arranged coaxially with the central axis of the glass tube 210.

[0028] like Figures 2 to 5 As shown, the optical axis of the wide-angle lens 230 coincides with the axis of the glass tube 210, and the field of view covers a 360° aperture wall range, so that the spectral detector 220 can directly acquire the aperture wall reflected light signal after the light is split by the filter body 260.

[0029] The light source 240 adopts a ring-shaped broadband light source with its light emission direction facing the hole wall; the filter body 260 adopts a linear gradient filter structure with its center wavelength changing linearly along the radial or axial direction.

[0030] The light-blocking plate 250 is made of black matte material, and its inner diameter is larger than the outer diameter of the annular structure formed by the filter body 260, in order to block the direct light from the light source 240 from entering the wide-angle lens 230.

[0031] This application adopts an optical path design that directly observes the borehole wall to reduce light loss. Specifically, by coaxially and compactly arranging the components within the glass tube 210 (spectral detector 220, wide-angle lens 230, and filter body 260 are coaxial), the optical path is achieved as follows: light source 240 - borehole wall - filter body 260 - wide-angle lens 230 - spectrometer 220, thus reducing the light energy attenuation at the reflection interface. This solves the problem of complex structure and difficulty in adapting to narrow boreholes in traditional spectral logging devices, and further improves the stability of the device in downhole vibration environments.

[0032] like Figures 2 to 5 As shown, the light-blocking plate 250 includes a fixing ring 251, a support rod 252, a connecting cloth 253, an adjusting rod 254, and a moving ring 255; The fixing ring 251 is fixed to the bottom of the spectral detector 220; multiple support rods 252 are provided and evenly arranged around the circumference of the fixing ring 251, one end of which is hinged to the bottom of the fixing ring 251, and the other end is an elastic rod structure that flexibly fits against the inner wall of the glass tube 210; the connecting cloth 253 is made of a flexible material with elastic properties and has a conical surface structure, and is fixed to the support rod 252; multiple adjusting rods 254 are provided, corresponding one to one with the support rod 252, one end of which is hinged to the support rod 252, and the other end is hinged to the moving ring 255; the moving ring 255 is slidably connected to the fixing column 231 by an electric slider; by moving the moving ring 255 up and down, the support rod 252 and the connecting cloth 253 are extended or retracted, so as to realize the adjustable light-blocking range.

[0033] like Figures 2 to 5 As shown, the reflected light formed by the light source 240 directly illuminating the hole wall is directly imaged onto the spectral detector 220 through the filter body 260 and the wide-angle lens 230.

[0034] This application employs an adjustable angle for the light-shielding plate 250, meaning the light-shielding range and the light illumination range are both adjustable. This allows for dynamic light shielding to adapt to various scenarios, enhancing measurement flexibility. Specifically, by moving the movable ring 255 within the light-shielding plate 250 up and down along the fixed column 231, the support rod 252 and the connecting cloth 253 can be elastically extended or retracted. This allows the connecting cloth 253 to form light-shielding structures with different tapers, achieving dynamic adjustment of the light-shielding range and dynamic matching of the light spot area with measurement requirements (e.g., shrinking the light-shielding taper to increase light flux during fine measurements, and expanding the light-shielding range to avoid overexposure during general surveys). This adapts to different apertures and measurement scenarios, solving the problems of low light energy utilization and insufficient detail capture capability of fixed light-shielding methods. It also enables dynamic matching of the light spot area with measurement requirements, improving the integrity and accuracy of spectral data.

[0035] By moving the movable ring 255 in the light shield 250 up and down along the fixed column 231, the support rod 252 and the connecting cloth 253 are extended or retracted, dynamically adjusting the light shielding range to adapt to multiple measurement scenarios with different borehole diameters. Secondly, by using the linear gradient filter body 260 distributed in a ring array, the continuous change of the center wavelength along the radial or axial direction is used to achieve gradient adjustment of the spectral resolution of the borehole wall at 360°. At the same time, the motor 120 drives the turntable 130 to extend and retract the connecting line 131, controlling the lowering depth of the logging unit 200 to cover the layered detection needs of the entire borehole section. In addition, combined with the intelligent dimming of the broadband light source 240, it adapts to different lithologies (such as high brightness for dark basalt and low brightness for light-colored limestone) and borehole wall roughness to ensure signal stability, forming a multi-faceted adjustment mechanism integrating light shielding, light splitting, positioning, and supplementary lighting, realizing high-precision and high-efficiency acquisition of in-situ spectral information in complex drilling environments.

[0036] In actual operation, the steps of this embodiment are as follows: S1: Fix the device to the ground via the base 100, start the computer 140 to control the motor 120 to drive the turntable 130 to release the connecting line 131, and drive the logging unit 200 to be lowered to the target drilling depth along the wellhead pulley 110, so that the spectral detector 220, wide-angle lens 230 and filter body 260 in the glass tube 210 remain coaxial with the borehole wall; S2: Based on the current aperture and measurement requirements, the computer 140 controls the electric slider on the fixed column 231 to drive the moving ring 255 to move up and down, thereby causing the support rod 252 and the connecting cloth 253 to unfold or retract, completing the dynamic adjustment of the light-shielding range of the light-shielding plate 250 to adapt to the direct observation optical path. S3: The light source 240 is activated to directly illuminate the hole wall. The light reflected from the hole wall is linearly split by the filter body 260 distributed in a ring array. The light is then directly collected by the wide-angle lens 230 and imaged on the spectrum detector 220. The data is simultaneously transmitted to the computer 140. S4: Computer 140 performs wavelength calibration and image reconstruction on the received spectral data, generates a 360° panoramic spectral image of the borehole wall, analyzes the rock mass structure and rock composition based on spectral features, and completes in-situ detection.

[0037] The technical solutions described in the embodiments of this application have at least the following technical effects or advantages: This application's multi-faceted adjustable spectral logging device uses a glass cylinder 210 as a transparent pressure-bearing shell to provide downhole protection for internal optical components, achieving a stable working environment during drilling. The moving ring 255 in the light-shielding plate 250 moves up and down along the fixed column 231, causing the support rod 252 and connecting cloth 253 to unfold or retract. Combined with the direct observation optical path design, this allows for dynamic adjustment of the light-shielding range, adapting to different apertures and measurement scenarios. The light source 240 directly illuminates the borehole wall, and after linear spectral dispersion by the filter body 260, the wide-angle lens 230 directly observes the reflected light from the borehole wall and images it onto the spectral detector 220, eliminating the conical mirror reflection stage and significantly reducing light loss and stray light interference. The coaxial integration of the spectral detector 220, wide-angle lens 230, and filter body 260 simplifies the non-reflective structure, relying on direct observation to improve seismic stability and spectral resolution, ensuring the authenticity and integrity of in-situ spectral information.

[0038] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. For those skilled in the art, the present invention can have various modifications and variations. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A multi-faceted adjustable spectral logging device, characterized in that, Includes a base (100), wellhead pulley (110), motor (120), turntable (130), connecting line (131), computer (140) and logging unit (200); The logging unit (200) includes a glass tube (210), a spectrometer (220), a wide-angle lens (230), a light source (240), a light shield (250), and a filter body (260), which acquires in-situ spectral information of the borehole wall through direct observation. The glass tube (210) is a cylindrical transparent shell, fixed at the end of the connecting line (131); the spectrometer (220) is fixed at the top inside the glass tube (210); the wide-angle lens (230) is fixed to the middle of the bottom surface of the spectrometer (220) by a fixing post (231) and electrically connected to it; the light source (240) is a ring structure, surrounding the outside of the spectrometer (220) and fixed at the top inside the glass tube (210); the light shield (250) is fixed below the spectrometer (220) and surrounding the outside of the wide-angle lens (230); multiple filter bodies (260) are provided, arranged in a ring array, located inside the glass tube (210) and surrounding the outside of the wide-angle lens (230), and arranged parallel to the hole wall.

2. The multi-faceted adjustable spectral logging device according to claim 1, characterized in that, The base (100) is a steel cuboid structure, placed horizontally on the ground; the wellhead pulley (110) is fixed on the ground by a bracket and located above the borehole opening; the motor (120) is fixed on the ground, and its output shaft is rotatably connected to the turntable (130) to drive the turntable (130) to rotate and retract the connecting line (131); one end of the connecting line (131) is wound around the turntable (130), and the other end passes through the wellhead pulley (110) and is connected to the logging unit (200); the computer (140), the motor (120) are electrically connected to the logging unit (200) to control the logging process and receive data.

3. The multi-faceted adjustable spectral logging device according to claim 1, characterized in that, The spectral detector (220), wide-angle lens (230), light source (240), light shield (250) and filter body (260) are all arranged coaxially with the central axis of the glass tube (210).

4. The multi-faceted adjustable spectral logging device according to claim 3, characterized in that, The optical axis of the wide-angle lens (230) coincides with the axis of the glass tube (210), and the field of view covers the 360° aperture wall range, so that the spectral detector (220) can directly acquire the aperture wall reflected light signal after the light is split by the filter body (260).

5. The multi-faceted adjustable spectral logging device according to claim 3, characterized in that, The light source (240) adopts a wide-spectrum light source with a ring structure, and its light emission direction is towards the hole wall; the filter body (260) adopts a linear gradient filter structure, and its center wavelength changes linearly along the radial or axial direction.

6. The multi-faceted adjustable spectral logging device according to claim 5, characterized in that, The light-blocking plate (250) is made of black matte material, and its inner diameter is larger than the outer diameter of the ring structure formed by the filter body (260) to block the direct light from the light source (240) from entering the wide-angle lens (230).

7. The multi-faceted adjustable spectral logging device according to claim 6, characterized in that, The light-blocking plate (250) includes a fixing ring (251), a support rod (252), a connecting cloth (253), an adjusting rod (254), and a moving ring (255); The fixing ring (251) is fixed to the bottom of the spectrometer detector (220); multiple support rods (252) are provided and are evenly arranged around the circumference of the fixing ring (251), one end of which is hinged to the bottom of the fixing ring (251), and the other end is an elastic rod structure that is flexibly attached to the inner wall of the glass tube (210); the connecting cloth (253) is made of a flexible material with elastic properties, has a conical surface structure, and is fixed to the support rod (252); Multiple adjusting rods (254) are provided, each corresponding to a support rod (252). One end of the adjusting rod is hinged to the support rod (252), and the other end is hinged to a moving ring (255). The moving ring (255) is slidably connected to the fixed column (231) via an electric slider. By moving the moving ring (255) up and down, the support rod (252) and the connecting cloth (253) are extended or retracted, thereby achieving adjustable shading range.

8. The multi-faceted adjustable spectral logging device according to claim 7, characterized in that, The reflected light formed by the light source (240) directly illuminating the hole wall is directly imaged onto the spectral detector (220) through the filter body (260) and the wide-angle lens (230).

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