A borehole three-dimensional television imaging instrument testing device and testing method

Abstract

This invention relates to the field of engineering geological exploration technology, specifically to a testing device and method for a borehole 3D television imaging system. The device includes: a leveling base with a leveling component for adjusting the base's balance; a rotating connector with a horizontal bubble and compass; an outer sleeve on the rotating connector, with a first set of marks at its bottom; an inner transparent sleeve inside the outer sleeve for containing test water, with a second set of marks at its top; and standard test paper between the outer sleeve and the inner transparent sleeve. This invention allows for indoor testing of the imaging quality of a borehole 3D television imaging system. It can calculate the error between the measured structural plane attitude and the standard structural plane attitude using the developed borehole wall diagram obtained by the system, and can also test the color difference in the borehole 3D television imaging system to determine whether the system meets the requirements of engineering geological exploration.

Description

Technical Field

[0001] This invention relates to the field of engineering geological exploration technology, and in particular to a borehole three-dimensional television imaging test device and test method. Background Technology

[0002] Borehole television imaging (BMI) is an exploration method that uses optical imaging to detect the structural features of underground strata, offering intuitive and accurate results. Currently, several domestic and international instrument manufacturers have developed BMIs. Their basic working principle involves using high-definition cameras to scan and record video of the borehole wall, simultaneously recording azimuth information. The video and azimuth signals are then transmitted to a ground-based host computer for storage and processing. Processing software converts the video and azimuth data into borehole wall distribution maps and electronic core samples with azimuth information. Through in-hole imaging, stratigraphic structural features such as color, type and occurrence of structural planes, and fracture density and width can be observed intuitively and clearly, providing direct and reliable evidence for rock mass stratification, structural plane statistics, and engineering geological evaluation.

[0003] In-bore imaging technology offers advantages such as convenient testing, high precision, strong practicality, and immediate display of results, making it widely used in engineering geological exploration to observe the color and structural characteristics of underground rock masses. To ensure the accurate acquisition of information such as rock mass color and structural plane orientation by a 3D television imager, it is necessary to periodically test the equipment to guarantee its accuracy. This invention provides an indoor testing device and method that can simulate a vertical borehole environment. The device's components are modularly installed, allowing for easy disassembly, transportation, and portability. The testing method is simple to operate, highly feasible, and has good prospects for widespread application. The following key issues need to be addressed:

[0004] (1) The borehole three-dimensional television imager is mainly used to obtain borehole wall information. Among them, the space of vertical borehole is narrow, dark, and often has water. Designing a test device that can simulate the vertical borehole environment indoors, can determine the geomagnetic direction and the vertical state of the borehole, can be modularly installed, can be freely disassembled, and is convenient to transport and carry is one of the key technical problems that need to be solved.

[0005] (2) In actual engineering, the underground rock mass structure surface attitude, width, and location information can be obtained from the borehole wall unfolding diagram obtained by the borehole three-dimensional television imaging instrument. This provides an idea and method to test the accuracy of the underground rock mass structure surface attitude, width, and location information obtained by the instrument, which is the second key technical problem to be solved.

[0006] (3) The borehole three-dimensional television imager uses the principle of optical imaging to acquire data, so it can acquire the color of underground rock mass. It provides an idea and method to test the color difference of the color acquired by the instrument, which is the third key technical problem to be solved. Summary of the Invention

[0007] To address the aforementioned problems in the prior art, the present invention provides a borehole 3D television imaging test device, comprising:

[0008] A leveling base, wherein the leveling base is provided with leveling components for adjusting the balance of the base;

[0009] The base is provided with a rotating connector, and the rotating connector is provided with a level bubble for observing the horizontal state of the base and a compass for observing the orientation of the rotating connector.

[0010] The rotating connector is also provided with an outer sleeve, the bottom of which is provided with a first set of marks for alignment with the rotating connector; the outer sleeve is provided with an inner transparent sleeve for containing test water, and the top of the outer sleeve is provided with a second set of marks for alignment with the inner transparent sleeve.

[0011] A standard card for testing is provided between the outer sleeve and the inner transparent sleeve.

[0012] This disclosure also provides a test method for a borehole 3D television imager, the test method being used on the borehole 3D television imager test device, including a borehole test method simulating a waterless environment and a borehole test method simulating a wet environment, wherein the borehole test method simulating a waterless environment specifically includes:

[0013] S1, the base and above are brought into a horizontal state by rotating the leveling component;

[0014] S2, rotate the rotating connector to make the compass point due north, and then fix the rotating connector;

[0015] S3, Place the borehole 3D TV imager to be tested into the bottom of the sleeve of the test device, start the borehole 3D TV imager to start working, keep it in a vertical state, acquire data at a constant speed from bottom to top, and process it to obtain the borehole wall unfolding diagram.

[0016] S4. Establish a two-dimensional coordinate system with depth as the vertical axis and orientation as the horizontal axis, and perform sine curve fitting on the structural surfaces on the hole wall unfolded diagram to obtain the sine curve expression of each structural surface.

[0017] S5, calculate the attitude of each structural plane;

[0018] S6. For each structural surface, randomly measure multiple width values ​​and then take the average value as the width of the measured structural surface.

[0019] S7. The relative errors between the measured attitude, width, and other data and the standard data are obtained through mathematical statistics; the average and variance of the absolute errors of the attitude, width, and depth of all structural surfaces are calculated.

[0020] S8. The hole wall unfolding diagram obtained by processing the original data is used to randomly select multiple small areas on each color block from top to bottom. The color difference between the test sample and the standard sample is measured using a colorimeter to obtain the comprehensive properties of the test area.

[0021] S9, feedback optimization and adjustment of the borehole 3D television imager.

[0022] The specific method for simulating a water-bearing environment drilling test is as follows: fill the inner cavity of the inner transparent casing with test water, and repeat steps S3 to S9.

[0023] The beneficial effect of this invention is that it can be used to improve the accuracy of borehole wall unfolding data obtained by a borehole 3D television imaging device in vertical boreholes in simulated waterless or water-containing environments indoors. Attached Figure Description

[0024] Figure 1 A schematic diagram of the borehole three-dimensional television imaging test device provided by the present invention;

[0025] Figure 2 This is a cross-sectional schematic diagram of the borehole three-dimensional television imaging test device provided by the present invention.

[0026] Figure 3 A top view schematic diagram of the borehole three-dimensional television imaging test device provided by the present invention;

[0027] Figure 4 This is a schematic diagram of the standard card provided by the present invention.

[0028] Reference numerals: 1-Leveling base, 2-Leveling component, 201-Disc-shaped knob, 202-Upper rod-shaped component, 203-Lower rod-shaped component, 3-Base, 301-Base disc-shaped part, 302-Base ring-shaped part, 4-Rotating connector, 401-Lower alignment post, 402-Upper disc, 403-Triangular alignment mark, 5-Outer sleeve, 501-Lower disc base, 502-Upper sleeve, 503-Vent hole, 504-First triangular alignment mark, 505-Second triangular alignment mark, 6-Inner transparent sleeve, 602-Third triangular alignment mark, 7-Standard card, 701-Standard card Paper width, 702-Standard card height, 703-Standard card inner surface, 704-Azimuth coordinates, 705-Depth coordinates, 706-Standard structural surface sine curve trace, 707-Standard color blocks of the three primary colors of light, 8-Horizontal bubble, 801-Horizontal bubble water, 802-Bubble, 9-Compass, 901-North compass, 902-Digital dial, 10-Tightening component, 1001-Tightening component fixing bracket, 1002-Tightening screw head, 1003-Tightening screw rod-shaped part, 11-Fixing screw, 1101-Fixing screw head, 1102-Fixing screw rod-shaped part, 12-Bearing, 13-Test water. Detailed Implementation

[0029] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0030] To address the aforementioned technical problems, this disclosure proposes a borehole 3D television imaging test device, as shown in the attached diagram. Figures 1-4 As shown, the device mainly includes a leveling base 1, a leveling component 2, a base 3, a rotating connector 4, an outer sleeve 5, an inner transparent sleeve 6, a standard card 7, and also includes a horizontal bubble 8, a compass 9, a tightening component 10, a fixing screw 11, a bearing 12, and test water 13, etc.

[0031] The leveling base 1 is a circular non-magnetic steel plate, which serves as a stabilizing device. The leveling component 2 is installed on the leveling base 1.

[0032] The leveling component 2 consists of three parts: a disc-shaped knob 201, an upper rod-shaped component 202, and a lower rod-shaped component 203. The disc-shaped knob 201 and the upper rod-shaped component 202 form a fixed integral structure. The lower rod-shaped component 203 protrudes slightly and can be embedded in the leveling base 1. The upper rod-shaped component 202 above the disc-shaped knob 201 is a screw that connects to the screw hole of the base 3. By rotating the four disc-shaped knobs 201, the structure above the base 3 can be leveled.

[0033] The base 3 is generally made of high-strength non-magnetic steel plate, and consists of a base disc-shaped part 301 and a base annular part 302. The base disc-shaped part 301 is provided with four screw holes, and the inner diameter of the base annular part 302 is equal to the outer diameter of the bearing 12. The base disc-shaped part 301 and the base annular part 302 are an integral structure.

[0034] The rotating connector 4 is a high-strength non-magnetic steel plate, consisting of a lower alignment post 401, an upper disk 402, and a triangular alignment mark 403. The lower alignment post 401 is rod-shaped, and its diameter is equal to the inner diameter of the bearing 12. The lower alignment post 401 has a conical guide structure at its lower part. The upper disk 402 has four screw holes, and the diameter of the screw holes is equal to the diameter of the fixing screw.

[0035] The outer sleeve 5 is made of opaque PVC material and consists of a lower disc base 501, an upper sleeve 502 and an exhaust hole 503. The lower disc base 501 has four screw holes with a diameter equal to that of the fixing screw 11. The lower disc base 501 and the upper sleeve 502 are an integral structure.

[0036] The inner transparent sleeve 6 is made of transparent PVC or glass and is a cylindrical structure with a closed bottom and a hollow interior. The internal cavity of the inner transparent sleeve 6 can hold the test water 13.

[0037] The outer sleeve 5 has a first triangular alignment mark 504 on the surface of the lower disc base 501, and the inner transparent sleeve 6 has a third triangular alignment mark 602 on the top surface. During implementation, the first triangular alignment mark 504 on the top surface of the outer sleeve 5 and the triangular tip of the third triangular alignment mark 602 on the top surface of the inner transparent sleeve need to be aligned.

[0038] The upper surface of the lower disc base 501 of the outer sleeve 5 has a second triangular alignment mark 505, and the surface of the upper disc 402 of the rotating connector 4 has a triangular alignment mark 403. During implementation, the second triangular alignment mark 505 on the surface of the lower disc base 501 needs to be aligned with the apex of the triangle of the triangular alignment mark 403 on the surface of the upper disc 402 of the rotating connector 4.

[0039] There is a vent 503 at the connection between the upper sleeve 502 and the lower disc base 501 of the outer sleeve 5. When the inner transparent sleeve 6 with the standard card 7 attached is inserted into the outer sleeve 5, the gas in the outer sleeve 5 can be discharged from the vent 503.

[0040] The standard cardstock 7 is a flexible cardstock. The width 701 of the standard cardstock is equal to the outer perimeter of the cross-section of the inner transparent sleeve 6, and the height 702 of the standard cardstock is equal to the height of the inner transparent sleeve 6. The upper edge of the inner surface 703 of the standard cardstock has an azimuth coordinate 704 along the horizontal direction, with a scale accuracy of 1°. The left side of the inner surface 703 has a depth coordinate 705 along the vertical direction, with a scale accuracy of 1mm. The inner surface 703 of the standard cardstock has a standard structural surface sine curve trace 706 and standard color blocks 707 for the three primary colors of light. The standard cardstock 7 can be placed between the outer sleeve 5 and the inner transparent sleeve 6. The inner surface 703 of the standard cardstock is in close contact with the inner transparent sleeve 6.

[0041] The horizontal bubble 8 is installed on the upper disk 402 of the rotating connector 4. The horizontal bubble 8 contains horizontal bubble water 801 and bubble 802, which is used to observe whether the components above the base are in a horizontal state. When in use, the bubble 802 in the horizontal bubble 8 can be centered by rotating the leveling component 2.

[0042] The compass 9 is mounted on the upper disc 402 of the rotating connector 4 and is used to adjust the orientation of the device. When in use, the compass needle 901 is rotated to point to the due north direction of the compass dial 902 before the test can be carried out.

[0043] The tightening member 10 is fixed on the base disc-shaped part 301 of the base 3. It consists of a fixed bracket 1001, a tightening screw head 1002, and a tightening screw rod-shaped part 1003. The tightening screw head 1002 has a large outer diameter, which makes it convenient for users to tighten manually.

[0044] The fixing screw 11 consists of a fixing screw head 1101 and a fixing screw rod-shaped part 1102. It is used to connect the lower disc base 501 of the outer sleeve 5 and the upper disc 402 of the rotating connector 4. The fixing screw head 1101 has a large outer diameter, which makes it convenient for users to tighten manually.

[0045] The bearing 12 is made of non-magnetic material and is placed inside the annular part 302 of the base. It serves to make close contact with the lower alignment post 401 of the rotating connector 4 and to reduce friction during rotation.

[0046] The test water 13 can be placed in the inner transparent sleeve 6 to mainly simulate the water-bearing drilling environment.

[0047] Except for the pointer of compass 9, all other components are made of non-magnetic materials.

[0048] The disclosed apparatus can be used to simulate and test the accuracy of structural surface attitude information measured by a borehole 3D television imager in a vertical drilling environment indoors. It can also be used to simulate and test the chromatic difference information of the borehole wall unfolding diagram acquired by the borehole 3D television imager in a vertical drilling environment indoors.

[0049] There are three possible relationships between the structural plane and the borehole wall: the structural plane completely cuts the borehole wall, the structural plane partially cuts the borehole wall, and the structural plane does not cut the borehole wall. In actual engineering, the latter two are less likely to occur; the structural plane completely cuts the borehole wall most often. The borehole wall image is unfolded in NESWN (North-East-South-West-North) orientation sequence. A straight structural plane completely cutting the borehole wall will show a sinusoidal curve trace on the unfolded borehole wall image. Therefore, a two-dimensional coordinate system is established with the depth on the standard card as the vertical axis and the orientation on the standard card as the horizontal axis. The standard structural plane parameters on the standard card are calculated using the following formula.

[0050] (1)

[0051] (2)

[0052] (3)

[0053] In equations (1) to (3): x is the azimuth degree (°); A is the vertical distance from the trough to the crest of the sinusoidal curve trace of the standard structural surface (mm); α is the dip of the standard structural surface (°); β is the inclination angle of the standard structural surface (°); b is the average depth from the trough to the crest of the sinusoidal curve trace of the standard structural surface, which can represent the depth of the standard structural surface from the orifice (m).

[0054] This disclosure specifies that 16 standard structural surface sinusoidal curve traces 706 are marked on the inner surface 703 of the standard cardstock, and are numbered sequentially from top to bottom according to the depth of the standard structural surface sinusoidal curve traces 706, as shown in Table 1.

[0055] Table 1 Standard Structural Surface Information Table

[0056]

[0057]

[0058] This disclosure discloses standard color blocks 707 of the three primary colors of light, arranged from top to bottom on the inner surface 703 of a standard card, namely red, green, blue, green, blue, blue, green, and blue, which can verify the color difference of the imaging of the three-dimensional television imager inside the hole.

[0059] The method for analyzing the accuracy of structural plane orientation and width measurements disclosed herein involves installing the testing device and placing the borehole 3D television imager to be tested into the sleeve of the device for testing. The borehole 3D television imager acquires raw test data, including information such as the morphology, orientation, and depth of the standard structural plane on the standard card 7. The raw data is processed to obtain a borehole wall unfolded diagram. A two-dimensional coordinate system is established with depth as the vertical axis and orientation as the horizontal axis. The structural plane traces on the borehole wall unfolded diagram are fitted with a sine curve to obtain the sine curve expression (Equation 4) that best matches the structural plane traces.

[0060] (4)

[0061] The attitude, width, and other data of the fitted structural surface are obtained through equation (4), with a dip of α. i and tilt angle β i The calculation formula is as follows:

[0062] (5)

[0063] (6)

[0064] For each structural surface, the width value w is measured at 5 random locations. ij (w) ij (This represents the width value at the j-th position of the i-th structural surface), and the average value is taken as the measured width W of the structural surface. i The calculation formula is as follows:

[0065] (7)

[0066] The absolute error e between the measured data on the attitude and width of the structural surface and the standard data was obtained through mathematical statistics. i and the average of all relative and absolute errors. The variance s is calculated using the following formula:

[0067] (8)

[0068] (9)

[0069] (10)

[0070] In this disclosure, i = {1, 2, 3, ..., 14, 15, 16} and n = 16 in equations (4) to (10).

[0071] The imaging color difference analysis method disclosed herein involves, after installing the testing device, placing the borehole 3D television imager to be tested into the sleeve of the device for testing. The borehole 3D television imager acquires raw test data, including color information from the standard card. The raw data is processed to obtain a borehole wall unfolded diagram. Ten small areas are randomly selected from each color block from top to bottom, and the color difference between the test sample and the standard sample is measured using a colorimeter. The brightness L of the test area is then measured. ij Red and green a ij Yellow and blue b ij Given the standard luminance L0, red-green a0, and yellow-blue b0, the total color difference is obtained according to equation (11). E ij The average total color difference of each color block is obtained according to equation (12). .

[0072] (11)

[0073] (12)

[0074] In this disclosure, i = {1, 2, 3, ..., 7, 8, 9} and n = 10 in equations (11) to (12).

[0075] Different industries have different requirements for product color difference range. Currently, there is no internationally unified standard for color difference range. The total color difference in this disclosure... E-tolerance and visual perception reference table 2.

[0076] Table 2 Total Color Difference E-Tolerance and Visual Perception Correspondence Table

[0077]

[0078] This disclosure solves the current problem of being unable to test the structural surface information and color accuracy of borehole 3D television imaging instruments indoors. It allows ordinary personnel to conduct tests in a simulated vertical borehole environment indoors, obtaining test data to provide a basis for the optimization and adjustment of the instrument. The indoor testing device mentioned in this disclosure is easy to manufacture, portable, and the testing method is simple to operate, highly feasible, and has good prospects for widespread application.

[0079] The testing device mentioned in this disclosure is simple to manufacture, easy to install, and occupies little space, making it suitable for indoor testing. The testing method mentioned in this disclosure is based on sound principles, simple to operate, and highly feasible, providing fundamental data for the optimization and adjustment of the instrument. This disclosure can meet the indoor testing needs of borehole 3D television imagers in practical engineering projects, and has good social and economic benefits.

[0080] In a specific implementation scenario, such as Figures 1-2 The testing device disclosed herein mainly includes: 1-leveling base, 2-leveling component, 3-base, 4-rotary connector, 5-outer sleeve, 6-inner transparent sleeve, 7-standard card, 8-level bubble, 9-compass, 10-tightening component, 11-fixing screw, 12-bearing, 13-test water, etc.

[0081] The installation steps for the test device disclosed herein are as follows:

[0082] Step 1: Place the leveling base 1 on a relatively flat indoor surface to act as a stabilizing device, and install the leveling component 2 on the leveling base 1.

[0083] Step 2: The upper rod-shaped part 202 of the leveling component 2 is connected to the screw hole of the base 3. The structure above the base 3 can be leveled by rotating the four disc-shaped knobs 201.

[0084] Step 3: Install the bearing 12 inside the base annular portion 302 on the base 3. Fix the clamping member 10 to the base disc portion 301 of the base 3. Accurately place the lower part of the rotating connector 4 into the bearing 12, aligning the column 401, thus assembling the base 3 and the rotating connector 4. A horizontal bubble 8 and a compass 9 are installed on the upper disc 402 of the rotating connector 4. The lower surfaces of the horizontal bubble 8 and the compass 9 are in close contact with the upper surface of the upper disc 402 of the rotating connector 4.

[0085] Step 4: The outer sleeve 5 is installed on the rotary connector 4. The lower surface of the lower disc base 501 of the outer sleeve 5 is in close contact with the upper surface of the upper disc 402 of the rotary connector 4. Align the second triangular alignment mark 505 on the surface of the lower disc base 501 of the outer sleeve 5 with the apex of the triangular alignment mark 403 on the surface of the upper disc 402 of the rotary connector 4. Align the four screw holes on the lower disc base 501 of the outer sleeve 5 with the four screw holes on the upper disc 402 of the rotary connector 4. Screw the fixing screws 11 into the four screw holes so that the outer sleeve 5 and the rotary connector 4 become a whole without relative displacement.

[0086] Step 5: Attach the standard cardstock 7 to the outer surface of the inner transparent sleeve 6. Align the upper edge of the inner transparent sleeve 6 with the upper edge of the standard cardstock 7. Align the tip of the third triangle alignment mark 602 on the top surface of the inner transparent sleeve 6 with the "N" position of the standard cardstock 7. The outer surface of the inner transparent sleeve 6 should be tightly attached to the inner surface 703 of the standard cardstock and should not fall off.

[0087] Step 6: Place the inner transparent sleeve 6 with the standard card 7 attached into the outer sleeve 5, and align the tip of the first triangle alignment mark 504 on the top surface of the outer sleeve 5 with the tip of the third triangle alignment mark 602 on the top surface of the inner transparent sleeve.

[0088] This disclosure includes a drilling test method simulating a waterless environment and a drilling test method simulating a wet environment. The drilling test method simulating a waterless environment includes:

[0089] Step 7: By rotating the disc-shaped knobs 201 of the four leveling parts 2, the bubble 802 in the horizontal bubble 8 is positioned at the center of the horizontal bubble. At this time, the base and above of the testing device are in a horizontal state.

[0090] Step 8: By rotating the rotating connector 4, make the compass needle 901 of the compass 9 point to the due north direction of the dial 902; by rotating the tightening part 10 tightening screw head 1002, the tightening screw rod 1003 tightens the rotating connector 4, at which point the rotating connector 4 is locked and cannot be rotated; the orientation of the test device is successfully determined.

[0091] Step 9: Place the borehole 3D television imager to be tested at the bottom of the test device sleeve, start the borehole 3D television imager to begin operation, keep it vertical, and acquire data at a constant speed "from bottom to top". The data is transmitted to the host computer, and the "hole wall unfolding diagram" of this test is obtained through post-processing software, containing information such as depth, orientation, structural surfaces, and color. During the test, you can also choose to acquire data at a constant speed "from top to bottom". In this case, at the beginning of the test, the imaging part of the borehole 3D television imager lens should be horizontally aligned with the top of the outer sleeve 5 of the test device.

[0092] Step 10: For the "hole wall unfolded diagram" obtained in this test, establish a two-dimensional coordinate system with depth as the vertical axis and orientation as the horizontal axis. Perform sine curve fitting on the structural surfaces on the "hole wall unfolded diagram" obtained in this test to obtain the sine curve expression for each structural surface. The basic form of the expression is as follows:

[0093]

[0094] Step 11: Calculate the attitude of each structural plane, dipping towards α. i and tilt angle β i The calculation formula is as follows:

[0095]

[0096]

[0097] Step 12: For each structural surface, randomly measure its width value w at 5 locations. ij (w) ij (This represents the width value at the j-th position of the i-th structural surface), and the average value is taken as the measured width W of the structural surface. i The calculation formula is as follows:

[0098]

[0099] Step 13: Obtain the relative errors between the measured attitude, width, and other data and the standard data through mathematical statistics; calculate the average and variance of the absolute errors of the attitude, width, and depth of all structural surfaces. See Table 3 for a calculation example, and the calculation formulas are as follows:

[0100]

[0101]

[0102]

[0103] Step 14: For the "hole wall unfolding diagram" obtained after processing the raw data, randomly select 10 small areas from top to bottom on each color block. Use a colorimeter to measure the color difference between the test sample and the standard sample, and measure the brightness L of the test area. ij Red and green a ij Yellow and blue b ij Given the standard luminance L0, red-green a0, and yellow-blue b0, calculate the total color difference for each region. E ij Average total color difference of each color block Calculation examples are shown in Table 4, and the calculation formulas are as follows:

[0104]

[0105]

[0106] Step 15: Analyze the imaging quality of the tested borehole 3D television imager based on the measured and processed data to provide basic data for the optimization and adjustment of the instrument.

[0107] To simulate a drilling test in a water-rich environment, fill the inner cavity of the inner transparent casing with test water 13 and repeat steps 9 to 14.

[0108] Table 3. Statistical Table of Structural Surface Tests for 3D Hole Drilling Television Imaging System

[0109]

[0110] Table 4. Statistical Table of Color Difference Test for Drilling 3D Television Imaging System

[0111]

[0112]

[0113] Beneficial effects:

[0114] (1) The present invention can test the imaging quality of the borehole three-dimensional television imager indoors. It can calculate the error between the measured structural plane attitude and the standard structural plane attitude by using the borehole wall unfolding diagram obtained by the borehole three-dimensional television imager. It can also test the color difference of the borehole three-dimensional television imager and detect whether the borehole three-dimensional television imager meets the requirements of engineering geological exploration.

[0115] (2) The various components of the indoor testing device mentioned in this invention are modularly installed and can be freely disassembled for easy transportation and carrying.

[0116] (3) The indoor testing device mentioned in this invention can adjust the horizontal and azimuth states of the testing device through components such as leveling parts, horizontal bubble, rotating connectors, and compasses, so as to ensure that the testing device can accurately simulate the environment inside the vertical hole and accurately locate the orientation of the testing device during indoor testing, thereby reducing testing errors.

[0117] (4) The indoor testing device mentioned in this invention is easy to manufacture, flexible to carry, simple to operate, highly feasible, and has good prospects for promotion and application and objective social and economic benefits.

[0118] (5) The test method mentioned in this invention is correct in principle, logically correct, and highly feasible, and can provide guidance for indoor testing of borehole 3D television imaging.

[0119] In the description of the embodiments of the present invention, it should be understood that the terms "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "center," "top," "bottom," "top," "bottom," "inner," "outer," "inner side," and "outer side," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention. "Inner side" refers to the interior or enclosed area or space. "Outer perimeter" refers to the area surrounding a specific component or specific area.

[0120] In the description of embodiments of the present invention, the terms "first," "second," "third," and "fourth" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first," "second," "third," or "fourth" may explicitly or implicitly include one or more of that feature. In the description of the present invention, unless otherwise stated, "a plurality of" means two or more.

[0121] In the description of the embodiments of the present invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "assembly" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in the present invention based on the specific circumstances.

[0122] In the description of embodiments of the present invention, specific features, structures, materials or characteristics may be combined in any suitable manner in one or more embodiments or examples.

[0123] In the description of the embodiments of the present invention, it should be understood that "-" and "~" represent a range of two numerical values, and this range includes the endpoints. For example, "AB" represents a range greater than or equal to A and less than or equal to B. "A~B" represents a range greater than or equal to A and less than or equal to B.

[0124] In the description of embodiments of the present invention, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects have an "or" relationship.

[0125] Although embodiments of the 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 invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A drilling three-dimensional television imaging test device, characterized in that, include: A leveling base, wherein the leveling base is provided with leveling components for adjusting the balance of the base; The base is provided with a rotating connector, and the rotating connector is provided with a level bubble for observing the horizontal state of the base and a compass for observing the orientation of the rotating connector. The rotating connector is also provided with an outer sleeve, the bottom of which is provided with a first set of marks for alignment with the rotating connector; the outer sleeve is provided with an inner transparent sleeve for containing test water, and the top of the outer sleeve is provided with a second set of marks for alignment with the inner transparent sleeve. A standard card for testing is provided between the outer sleeve and the inner transparent sleeve; a two-dimensional coordinate system is established with the depth on the standard card as the vertical axis and the orientation on the standard card as the horizontal axis; the inner surface of the standard card is marked with multiple standard structural surface sinusoidal curve trajectories; and the inner surface of the standard card has standard color blocks of the three primary colors of colored light from top to bottom. The standard structural plane parameters on standard cardstock are calculated using the following formula: （1） （2） （3） In equations (1) to (3): x is the azimuth degree (°); A is the vertical distance from the trough to the crest of the sinusoidal curve trace of the standard structural surface (mm); α is the dip direction of the standard structural surface (°); β is the inclination angle of the standard structural surface (°); b is the average depth from the trough to the crest of the sinusoidal curve trace of the standard structural surface, which can represent the depth of the standard structural surface from the orifice (m). Raw test data, including color information from a standard card, was acquired using a 3D drilling television imager. The raw data was processed to obtain a hole wall unfolding diagram. Ten small areas were randomly selected from each color block from top to bottom, and the color difference between the test sample and the standard sample was measured using a colorimeter. The brightness L of the test area was also measured. ij Red and green a ij Yellow and blue b ij Given the standard luminance L0, red-green a0, and yellow-blue b0, the total color difference is obtained according to equation (11). E ij The average total color difference of each color block is obtained according to equation (12). ; （11） （12） In this disclosure, in formulas (11) to (12), i = {1, 2, 3, ..., 7, 8, 9} and n = 10.

2. The borehole three-dimensional television imaging test device according to claim 1, characterized in that, The leveling component includes a disc-shaped knob, an upper rod-shaped component, and a lower rod-shaped component; the protruding part of the lower rod-shaped component is embedded in the leveling base; the upper rod-shaped component is a screw that is threadedly connected to the base.

3. The borehole three-dimensional television imaging test device according to claim 2, characterized in that, The base is a non-magnetic steel plate, comprising a base disc-shaped part and a base ring-shaped part that are integrally structured. The base disc-shaped part is provided with screw holes for threaded connection of the upper rod-shaped part, and the base ring-shaped part is provided with a bearing.

4. The borehole three-dimensional television imaging test device according to claim 3, characterized in that, The rotating connector includes a lower alignment post and an upper disk; The lower alignment post is located inside the bearing, and a horizontal bubble and a compass are mounted on the upper disk, with the lower surface of the horizontal bubble and the compass in close contact with the upper surface of the upper disk.

5. The borehole three-dimensional television imaging test device according to claim 4, characterized in that, The base is provided with a clamping member, and the compass is mounted on the upper disc of the rotating connector; The clamping component includes a clamping screw head and a clamping screw rod. By rotating the clamping screw head, the clamping screw rod is clamped to the rotating connector, at which point the rotating connector is locked and cannot be rotated.

6. The borehole three-dimensional television imaging test device according to claim 3, characterized in that, The outer sleeve is made of opaque PVC material, and the bearing is made of non-magnetic material.

7. The borehole three-dimensional television imaging test device according to claim 1, characterized in that, The rotating connector includes a triangular alignment mark, and the outer sleeve includes a lower disc base, the surface of which has a second triangular alignment mark for alignment with the triangular alignment mark.

8. The borehole three-dimensional television imaging test device according to claim 7, characterized in that, The surface of the lower disc base is also provided with a first triangular alignment mark, and the inner transparent sleeve is provided with a third triangular alignment mark for alignment with the first triangular alignment mark.

9. The borehole three-dimensional television imaging test device according to claim 1, characterized in that, The standard card is a flexible card, with a width equal to the outer perimeter of the cross-section of the inner transparent sleeve and a height equal to the height of the inner transparent sleeve; the standard card is placed between the outer sleeve and the inner transparent sleeve.

10. A testing method for a borehole three-dimensional television imager, characterized in that, The testing method is used on the borehole three-dimensional television imaging test device as described in any one of claims 1-9, and includes a simulated waterless environment drilling test method and a simulated water-containing environment drilling test method, wherein the simulated waterless environment drilling test method specifically includes: S1, the base and above are brought into a horizontal state by rotating the leveling component; S2, rotate the rotating connector to make the compass point due north, and then fix the rotating connector; S3, Place the borehole 3D TV imager to be tested into the bottom of the sleeve of the test device, start the borehole 3D TV imager to start working, keep it in a vertical state, acquire data at a constant speed from bottom to top, and process it to obtain the borehole wall unfolding diagram. S4. Establish a two-dimensional coordinate system with depth as the vertical axis and orientation as the horizontal axis, and perform sine curve fitting on the structural surfaces on the hole wall unfolded diagram to obtain the sine curve expression of each structural surface. S5, calculate the attitude of each structural plane; S6. For each structural surface, randomly measure multiple width values ​​and then take the average value as the width of the measured structural surface. S7. The relative errors between the measured attitude, width, and other data and the standard data are obtained through mathematical statistics; the average and variance of the absolute errors of the attitude, width, and depth of all structural surfaces are calculated. S8. The hole wall unfolding diagram obtained by processing the original data is used to randomly select multiple small areas on each color block from top to bottom. The color difference between the test sample and the standard sample is measured using a colorimeter to obtain the comprehensive properties of the test area. S9, feedback optimization and adjustment of the borehole 3D television imager; The specific method for simulating a water-bearing environment drilling test is as follows: fill the inner cavity of the inner transparent casing with test water, and repeat steps S3 to S9.

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