Rock abrasiveness testing methods, devices, systems, media and program products

Abstract

The present application discloses a rock abrasiveness test method, device, system, medium and program product. The method comprises: obtaining multiple images of the tip of a test needle taken from different viewing angles, performing image contour fitting on the tip of the test needle in each image, obtaining a wear contour, the wear contour being the outer contour of the tip of the test needle; determining the turning point of the line in the wear contour, measuring the dimensional parameters of the wear contour according to the turning point of the line; and generating rock abrasiveness parameters according to the dimensional parameters. According to the embodiment of the present application, the worn end face of the test needle can be quickly measured and the rock abrasiveness parameters can be calculated, and the method has high measurement efficiency and high accuracy.

Description

Technical Field

[0001] The present application belongs to the technical field of rock abrasiveness testing, and in particular, relates to a rock abrasiveness testing method, device, system, storage medium and program product. Background Art

[0002] In the construction of hard rock tunnels, the loss of rock-breaking tools is an important indicator of construction economy. In the prior art, the abrasiveness of the rock is determined by placing a test needle on the rock sample to be tested and moving it, and measuring the dimensional parameters of the test needle tip. The dimensional parameters of the test needle tip can be measured under a microscope by side or top view for the worn test needle. Each dimensional parameter is read manually, which has low reading accuracy and low measurement efficiency. Summary of the invention

[0003] The embodiments of the present application provide a rock abrasiveness testing method, device, system, storage medium and program product, which can solve the technical problem of low efficiency of existing rock abrasiveness testing methods.

[0004] In a first aspect, an embodiment of the present application provides a method for testing rock abrasiveness, the method comprising:

[0005] Acquire multiple images of the needle tip of the test needle taken from different viewing angles, perform image contour fitting on the needle tip in the images respectively, and obtain a wear contour, where the wear contour is the outer contour of the needle tip of the test needle;

[0006] Determine the turning point of the wear profile, and measure the size parameters of the wear profile according to the turning point of the wear profile;

[0007] The rock abrasiveness parameters are produced based on the size parameters.

[0008] In some embodiments, determining line turning points in the wear profile and measuring the spacing distances between the line turning points may include:

[0009] Set the connection points of the curve and the straight line in the wear profile, as well as the bending points of the broken line as line turning points;

[0010] Measures the distance between the turning points of a line.

[0011] In some embodiments, calculating the rock abrasiveness parameter according to the spacing distance corresponding to the front view image and the spacing distance corresponding to the side view image includes:

[0012] Acquire at least one of a front view image and a back view image of the worn end surface of the needle tip, and acquire at least one of side view images on opposite sides of the worn end surface of the needle tip;

[0013] Image contour fitting is performed on the needle tip in the image to obtain the wear contour.

[0014] In some embodiments, generating a rock abrasiveness parameter based on the size parameter includes:

[0015] The average diameter of the circular surface is calculated according to at least one corresponding interval distance in the front view image and the back view image, and at least one corresponding interval distance in the two side view images, and the rock abrasiveness parameter is generated according to the average diameter of the circular surface.

[0016] In some embodiments, before acquiring the front view image and the side view image of the needle tip of the trial needle, the method includes:

[0017] Controlling the rock sample to be tested and the test needle to move relative to each other along a first preset direction, so that the tip of the test needle forms a wear end surface extending along the first direction, the first direction intersects with the first preset direction, and the first preset direction is consistent with the indication direction displayed by the identification mark on the test needle;

[0018] Acquiring at least one of a front view image and a back view image of the needle tip of the test needle, and acquiring at least one of side view images on opposite sides of the needle tip of the test needle comprises:

[0019] Take a front view image and / or a back view image of the worn end surface in a direction perpendicular to the axis of the test needle and parallel to the indication direction of the identification mark;

[0020] The test needle is controlled to rotate to a preset angle and a side view image of the worn end surface is obtained.

[0021] In a second aspect, an embodiment of the present application provides a rock abrasiveness testing device, comprising:

[0022] A recognition module is used to obtain a plurality of images of the needle tip of the test needle taken from different viewing angles, and perform image contour fitting on the needle tip in each image to obtain a wear contour, where the wear contour is the outer contour of the needle tip of the test needle;

[0023] A measuring module, used for determining the turning points of the lines in the wear profile, and measuring the size parameters of the wear profile according to the turning points of the lines;

[0024] A calculation module is used to generate rock abrasiveness parameters based on size parameters.

[0025] In a third aspect, an embodiment of the present application provides a rock abrasiveness index test system, the rock abrasiveness index test system comprising: a rock friction test device, a test needle wear measuring device, a processor, and a memory storing computer program instructions, wherein the processor is respectively connected to the rock friction test device and the test needle wear measuring device for communication;

[0026] When the processor executes the computer program instructions, the rock abrasiveness testing method as described above is implemented.

[0027] In some embodiments, the rock friction test apparatus comprises:

[0028] A first clamping unit, used for clamping a test needle;

[0029] A first driving unit is used to drive the rock sample to be tested and the test needle clamped by the first clamping unit to move relative to each other along a first preset direction, so that the test needle generates a worn end surface extending along the first direction, the first direction is arranged to intersect with the first preset direction, and the first preset direction is consistent with the indication direction displayed by the identification mark on the test needle;

[0030] And the test needle wear measurement device includes:

[0031] A second clamping unit, used for clamping the test needle;

[0032] A second driving unit is used to drive the second clamping unit to rotate, so that the second clamping unit drives the test needle to rotate;

[0033] The visual acquisition unit, together with the second clamping unit, photographs the worn end surface of the test needle exposed from the second clamping unit in a direction perpendicular to the axis of the test needle and parallel to the indication direction displayed by the identification mark.

[0034] In a fourth aspect, an embodiment of the present application provides a computer storage medium having computer program instructions stored thereon, and when the computer program instructions are executed by a processor, the rock abrasiveness testing method as described above is implemented.

[0035] In a fifth aspect, an embodiment of the present application provides a computer program product, which includes computer program instructions. When the computer program instructions are executed by a processor, the rock abrasiveness testing method as described above is implemented.

[0036] The rock abrasion testing method, device, system, storage medium and program product provided in the embodiments of the present application obtain an image of the tip of a test needle and identify the image to obtain a wear profile, so that the rock abrasion parameters can be calculated by measuring the wear profile, thereby improving the test needle wear measurement speed; compared with manual measurement, by identifying the turning points of the lines in the wear profile, the recognition accuracy is high, and the calculated rock abrasion parameters have higher accuracy and better consistency; the rock abrasion parameters are calculated based on images taken in multiple directions, thereby improving the accuracy of the rock abrasion parameters. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments of the present application will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0038] Figure 1 It is a schematic diagram of the planar structure of an unworn test needle in one embodiment of the present application;

[0039] Figure 2 This is a schematic diagram of the planar structure of a test needle worn by rock in one embodiment of the present application;

[0040] Figure 3 This is a schematic structural diagram of a needle tip portion having a wear surface in one embodiment of the present application;

[0041] Figure 4 It is a schematic diagram of a process of a rock abrasiveness testing method provided in one embodiment of the present application;

[0042] Figure 5 is a schematic diagram of a front view image of a wear surface in an embodiment of the present application;

[0043] Figure 6 is a schematic diagram of a side view image of a wear surface in an embodiment of the present application;

[0044] Figure 7 It is a detailed flow chart of a rock abrasiveness testing method provided in one embodiment of the present application;

[0045] Figure 8 is a schematic diagram of a front view image of a wear surface in another embodiment of the present application;

[0046] Fig. 9 is a schematic diagram of a side view image of a wear surface in another embodiment of the present application;

[0047] Fig.10 It is a schematic diagram of the three-dimensional structure of a rock abrasiveness index test system provided in one embodiment of the present application;

[0048] Fig.11 This is a schematic diagram of the three-dimensional structure of a test needle wear measurement device according to an embodiment of the present application;

[0049] Fig.12 This is a schematic cross-sectional structure diagram of a test needle wear measurement device in one embodiment of the present application;

[0050] Fig.13 for Fig.11 An enlarged structural schematic diagram of part A is shown;

[0051] Fig.14 This is a partial structural schematic diagram of a test needle wear measuring device in one embodiment of the present application;

[0052] Fig.15 It is a schematic diagram of the hardware structure of a rock abrasiveness index test system provided in one embodiment of the present application;

[0053] Fig.16 It is a structural schematic diagram of a rock abrasiveness testing device provided in one embodiment of the present application. DETAILED DESCRIPTION

[0054] The features and exemplary embodiments of various aspects of the present application will be described in detail below. In order to make the purpose, technical solutions and advantages of the present application clearer, the present application will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are only intended to explain the present application, rather than to limit the present application. For those skilled in the art, the present application can be implemented without the need for some of these specific details. The following description of the embodiments is only to provide a better understanding of the present application by illustrating the examples of the present application.

[0055] It should be noted that, in this article, relational terms such as second and third are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the statement "include..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0056] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The embodiments will be described in detail below in conjunction with the accompanying drawings.

[0057] In the prior art, a test needle is placed on a rock sample to be tested and moved, and the rock abrasiveness is determined by measuring the size parameters of the test needle tip. Figure 1 The test needle 20 is rod-shaped. The test needle 20 includes a main body 201 and a needle tip 202 connected to each other. Before the rock abrasiveness test is performed, the test needle 20 needs to be processed so that the needle tip 202 of the test needle 20 has a conical needle tip. Figure 2After each rock abrasiveness test, the end of the needle tip 202 away from the main body 201 is worn, so that the needle tip 202 has a worn end surface. The needle tip 202 includes a connecting end 202a and a detection end 202b connected to each other, and the connecting end 202a connects the main body 201 and the detection end 202b. The worn end surface is at least a part of the outer surface of the detection end 202b. In the prior art, the dimensional parameters of the worn end surface of the test needle can be measured under a microscope by side view or top view method. The measurement value obtained by manual measurement has low accuracy and low measurement efficiency.

[0058] Ideally, the plane where the worn end face is located is perpendicular to the axis of the test needle 20. In this case, the diameter of the worn end face can be directly measured, and the degree of wear of the test needle 20 can be determined by the diameter. However, in actual experiments, the plane where the worn end face is located is usually set at an acute angle to the axis of the test needle 20, that is, the worn end face is an inclined surface. According to the recommended measurement methods of ASTM (2010) and ISRM (2013), when measuring the worn end face, the measured values ​​are all the diameters of the circular surface with the center on the axis of the test needle and perpendicular to the axis. When the worn end face is an inclined surface, the diameters of the circular surfaces corresponding to different positions of the worn end face may be different. Please refer to Figure 3 , is a schematic diagram of the structure of the needle tip in one embodiment, wherein point A is the lowest point of the wear end surface, and point C is the highest point of the wear end surface, and the highest point and the lowest point are the points on the wear end surface that are farthest and closest to the main body. The surface where points A and C are located is a wear surface, and the wear surface is inclined to the axis of the test needle 20. The diameter r1 of the circular surface passing through point A can be measured, and the diameter r2 of the circular surface passing through point C can be measured. The diameter of the circular surface corresponding to the wear end surface is the average value of r1 and r2. When measuring manually, the value of r2 cannot be directly measured, so the accuracy of the measured value is not high.

[0059] In order to solve the problems of the prior art, the embodiments of the present application provide a rock abrasiveness testing method, device, system, storage medium and program product. The rock abrasiveness testing method provided by the embodiments of the present application is first introduced below.

[0060] Figure 4 The following is a schematic flow chart of a rock abrasiveness testing method provided by an embodiment of the present application. The method comprises the following steps:

[0061] S100, acquiring a plurality of images of the needle tip of the test needle taken from different viewing angles, performing image contour fitting on the needle tip in each image, and obtaining a wear contour, where the wear contour is the outer contour of the needle tip of the test needle;

[0062] S200, determining a line turning point in the wear profile, and measuring a size parameter of the wear profile according to the line turning point;

[0063] S300, generating rock abrasiveness parameters according to the size parameters.

[0064] The needle tip can be photographed from multiple directions by the visual acquisition unit to obtain needle tips of different shapes. Optionally, the front view image, the side view image and the back view image can be taken with the worn end surface as a reference, so that the needle tip of each test needle is photographed from a fixed angle to ensure the consistency of the test data. During the shooting process, the test needle can be controlled to rotate, and the visual acquisition unit can also be controlled to rotate along the circumference of the test needle to change the positional relationship between the worn end surface and the visual acquisition unit, so as to achieve the shooting of the needle tip from different directions.

[0065] In order to ensure that the positional relationship between the worn end face of each test needle and the visual acquisition unit is relatively fixed during shooting, an identification mark can be set on the test needle, and the relative movement direction of the test needle and the rock sample is positioned according to the indicated direction displayed by the identification mark. At the same time, according to the indicated direction displayed by the identification mark, the test needle is positioned and rotated to a certain position along its axial direction and placed within the framing range of the visual acquisition unit. In one embodiment, the identification mark is a vertical line, and the rock sample and the test needle are relatively displaced along the direction indicated by the vertical line, and the needle tip of the test needle forms a worn end face. At the same time, the visual acquisition unit and the needle tip are relatively arranged along the direction indicated by the vertical line, so that the worn end face is facing the visual acquisition unit. When the worn end face is facing the visual acquisition unit, a front view image of the worn end face can be captured. It can be understood by those skilled in the art that the positioning mark can also be other patterns set at the end of the test needle or the circumferential surface of the test needle, such as: a triangle pattern, an arrow pattern, a cross pattern, etc., for positioning the test needle.

[0066] Before image contour fitting, the image can also be preprocessed. Since the image to be obtained in this application is the image of the worn needle tip, which usually has wear residue attached to it, preprocessing can be performed to remove the residue in the image to improve the accuracy of subsequent wear contour recognition. The image can also be processed in black and white to reduce the amount of calculation for subsequent image contour fitting. Please refer to Figure 5 and Figure 6 , Figure 5 This is a front view image of the test needle tip. Figure 6 For the side view image of the needle tip of the test needle, the image contour is fitted to depict the outer contour of the needle tip in the two-dimensional image, and the outer contour is expressed by lines. Specifically, the boundary points between the needle tip and the image background can be identified based on color differences, brightness differences, etc., and then adjacent boundary points are connected to form the wear contour. Figure 5 It can be seen from the figure that in the wear profile of the needle tip, the curve passing through the top of point C is a part of the outer periphery of the wear end surface. Figure 6It can be seen that in the wear profile of the needle tip, the line connecting the highest point C and the lowest point A can be expressed as the diameter of the wear end surface in a certain direction.

[0067] Due to the existence of the wear end surface, the wear profile has multiple line turning points, which can be the connection point between the curve and the straight line, or the bending point of the broken line. Figure 5 In the figure, points E and F are both turning points of the line; Figure 6 In the figure, points A and C are both turning points of the line.

[0068] The angle of the line with the turning point of the line as the vertex and the length of the line between the turning points of the line can reflect the size of the worn end surface, for example Figure 5 in, the length of line EF; Figure 6 In the figure, the length of line AC can reflect the inclination degree and chord length of the wear end face. The inclination angle, area, maximum diameter, minimum diameter, etc. of the wear end face can be further calculated through the axis L of the test needle. In this application, the size parameter is any one or more of the inclination angle, area, maximum diameter, minimum diameter, etc. of the wear end face. The rock abrasiveness parameter can be calculated or queried through one or more size parameters, and the rock abrasiveness can be characterized by the rock abrasiveness parameter.

[0069] In the present application, in the rock abrasion test method proposed, an image of the test needle tip is obtained and the image is recognized to obtain the wear profile, so that the rock abrasion parameters can be calculated by measuring the wear profile, thereby improving the test needle wear measurement speed; compared with manual measurement, by identifying the turning points of the lines in the wear profile, the recognition accuracy is high, and the calculated rock abrasion parameters have higher accuracy and better consistency; the rock abrasion parameters are calculated based on images taken in multiple directions, thereby improving the accuracy of the rock abrasion parameters.

[0070] As an alternative embodiment, please refer to Figure 7 The above S200 may include:

[0071] S210, setting the connection points of the curve and the straight line in the wear profile, and the bending points of the broken line as line turning points;

[0072] S220, measuring the interval distance between the turning points of the lines.

[0073] The lines between the turning points of the lines obtained from different viewing angles can reflect the size of the worn end surface, e.g. Figure 5 The line between point E and point F, Figure 6 The line between point A and point C can reflect the chord length of the worn end surface.

[0074] As an optional embodiment, the above S100 includes:

[0075] S110, obtaining at least one of a front view image and a back view image of the worn end surface of the needle tip, and obtaining at least one of side view images on two opposite sides of the needle tip;

[0076] S120, performing image contour fitting on the needle tip in the image to obtain a wear contour.

[0077] The front view image, back view image and side view image are used for identification, measurement and calculation, and the obtained numerical values ​​have high consistency and accuracy. Since the test needle is a symmetrical structure along its axis, the wear profiles of the front view image and the back view image are highly similar, and the wear profiles of the test images at two different angles are highly similar. Therefore, at least one of the front view image and the back view image, or at least one of the two test images, can be used to measure the size parameters of different wear surfaces from the identified wear profile. Of course, the front view image, the back view image and the two test images can also be profile fitted as needed to improve the accuracy of the measurement results.

[0078] As an optional embodiment, the above S300 includes:

[0079] S310, calculating an average circular surface diameter according to at least one corresponding spacing distance in the front view image and the back view image, and at least one corresponding spacing distance in the two side view images, and generating a rock abrasiveness parameter according to the average circular surface diameter.

[0080] That is, a person skilled in the art can calculate the average diameter of the circular surface using the spacing distance corresponding to the front view image and the spacing distance corresponding to the side view image, and can also calculate the average diameter of the circular surface using the spacing distance corresponding to the back view image and the spacing distance corresponding to the side view image. Of course, the average diameter of the circular surface can also be calculated using the front view image, the back view image and two side view images.

[0081] See also Figure 8 , is a front view image of a test needle in an embodiment. In this image, the highest point of the worn end surface is point C, and the lowest point is point A. In order to accurately reflect the wear degree of the worn end surface, the diameter d of the circular surface where point A is located should be measured. A and the diameter d of the circle where point C is located C , calculate d A and d C The average value of is the dimension parameter of the wear end surface. Figure 8 Medium, d C As shown by the dotted line IJ passing through point C, d A and d C The length of the straight line corresponding to the average value is shown by the dotted line L2. Since point A is located in a position that is not easy to distinguish and identify, d Acannot be accurately measured, but the length of the line between the turning point E and the turning point F can be directly measured. EF is the diameter of the circle passing through points E and F, and is the closest to d among the diameters of the circle that can be directly measured. A The value of d EF and d C The average value represents the size parameter of the wear end surface. Figure 8 Medium EF and d C The length of the straight line corresponding to the average value of is shown by the dotted line L1. It can be understood by those skilled in the art that EF and d C The average value d L1 Definitely better than d A and d C The average value d L2 Be small.

[0082] Please refer to Fig. 9 ,for Figure 8 The side view of the test needle in the embodiment shown. Since the test needle is a symmetrical structure along its axial direction, according to the geometric relationship of the three views, Figure 8 The middle straight line IJ and Fig. 9 The lines BC in are equal, Figure 8 The length of the straight line EF in Fig. 9 The straight line GH in is equal. Similarly, in Fig. 9 In the figure, the highest point of the worn end surface is point C, the lowest point is point A, and d C As shown by the dotted line BC passing through point C, d A It is shown by the dotted line AD passing through point A. A and d C The straight line length corresponding to the average value is shown by the dotted line L2. Fig. 9 The G-spot cannot be directly determined. Fig. 9 It is also difficult to determine the exact position of point H on line CD. Fig. 9 It is difficult to adopt Figure 8 The consistent measurement method obtains the diameter of the circular surface passing through the same point, which makes it impossible to use a unified measurement standard for images from different viewing angles.

[0083] In the prior art, manual measurement of d EF And estimate d C , and then calculate d EF and d C Average value L1 ; Manual measurement AD And estimate d C , and then calculate d AD and d C Average value L2, calculate d L1 and d L2 The average value of represents the degree of wear of the wear end surface. EF Less than d A , so that d L1 and d L2 The average value is less than d A and d C The average value, d L1 and d L2 The average value cannot accurately reflect the degree of wear.

[0084] Since the wear end surface is produced by the relative movement of the rock sample and the test needle along the first preset direction, the wear end surface is usually elliptical. Figure 8 In the front view image shown, d EF Less than d A and d C The difference from the front view image is that Fig. 9 In the side view image shown, point A and point C are easily distinguished from the background image, making point A and point C easy to identify. The line connecting point A and point C is d AC Greater than d A and d C In this application, the front view image is used, and d EF Less than d A and d C The average value of the side view image is d AC Greater than d A and d C In this embodiment, d is directly measured for the front view image and the back view image. EF , directly measure d for the side view image AC , and calculate d EF and d AC The average value is used as the size parameter of the wear end surface, compared with the d calculated in the prior art. L1 and d L2 The average value of the circular diameter calculated by this application more truly reflects the wear degree of the wear end face. And compared with the estimated d C , directly measured d EF and d AC Higher accuracy.

[0085] In Example 1 and Example 2, the rock abrasiveness test method provided in the present application is used to measure the front view image, the back view image and the two side view images. In Comparative Example 1 and Comparative Example 2, the ISRM reading method in the prior art is used for measurement. Please refer to Table 1, d Ais 0.5 mm, the angle between the straight line AC and the straight line AD is α, d L2 is d A +d C The average value of 1 / 2d C is r1,1 / 2d A When r2 is the measured values ​​of Example 1 and Comparative Example 1, the mean is the average of the measured values ​​of the front view image, the back view image and the two side view images, the error is the absolute value of the difference between the mean and the true value, and the true value is the average of the circular surface diameters corresponding to the highest point and the lowest point. Some values ​​can be calculated by the following formula:

[0086]

[0087] d GH =2r2(1-tanα)

[0088]

[0089]

[0090] Table 1 Comparison of measured values ​​of Example 1 and Comparative Example 1 of the present application

[0091]

[0092]

[0093] It can be seen from Table 1 that as the inclination angle α gradually increases, the error values ​​of the two reading methods increase. The error value of the rock abrasiveness test method provided in the present application is significantly smaller than the error value of the ISRM reading method, which proves that the size parameters obtained by the rock abrasiveness test method provided in the present application are closer to the true value.

[0094] See Table 2, d L2 is d A +d C The average value, d L2 is 0.5 mm, the angle between the straight line AC and the straight line AD is α, 1 / 2d C is r1,1 / 2d A When r2 is the measured values ​​of Example 2 and Comparative Example 2, the mean is the average of the measured values ​​of the front view image, the back view image and the two side view images, the error is the absolute value of the difference between the mean and the true value, the true value is the average value of the diameter of the circular surface corresponding to the highest point and the lowest point, and the score value can be calculated by the following formula:

[0095]

[0096] d GH =0.5(1+tanα)(1-tanα)

[0097]

[0098]

[0099] Table 2 Comparison of measured values ​​of Example 2 and Comparative Example 2 of the present application

[0100]

[0101]

[0102] It can be seen from Table 2 that as the inclination angle gradually increases, the error values ​​of the two reading methods increase. The error value of the rock abrasiveness test method provided in the present application is significantly smaller than the error value of the ISRM reading method, which proves that the size parameters obtained by the rock abrasiveness test method provided in the present application are closer to the true value.

[0103] As an optional embodiment, the above-mentioned S100 includes:

[0104] Controlling the rock sample to be tested and the test needle to move relative to each other along a first preset direction, so that the tip of the test needle forms a wear end surface extending along the first direction, the first direction intersects with the first preset direction, and the first preset direction is consistent with the indication direction displayed by the identification mark on the test needle;

[0105] S110 includes:

[0106] Take a front view image and / or a back view image of the worn end surface in a direction perpendicular to the axis of the test needle and parallel to the indication direction of the identification mark;

[0107] The test needle is controlled to rotate to a preset angle and a side view image of the worn end surface is obtained.

[0108] After the front view image of the worn end surface is obtained, the test needle rotates 90°, and the side view image of the worn end surface can be obtained through the visual acquisition unit; after the test needle rotates 90° again, the visual acquisition unit can acquire the back view image of the worn end surface, and so on. By setting the identification mark, and referring to the indication direction displayed by the identification mark to wear the test needle and shoot the needle tip, the consistency of the measurement process for different test needles is guaranteed.

[0109] Those skilled in the art can understand that the visual acquisition unit in the present application can not only acquire the wear condition image of the worn test needle, but also acquire the tip cone angle image of the unworn test needle, so as to judge whether the test needle that has not been worn by the rock sample meets the preset test conditions, so as to determine whether the test needle can undergo subsequent wear operations.

[0110] As an optional embodiment, before the step of controlling the rock sample to be tested and the test needle to move relative to each other along a first preset direction so that the tip of the test needle forms a wear end surface extending along the first direction, the method includes:

[0111] An image of the needle tip of the test needle is acquired, and image contour fitting is performed on the needle tip in the image to obtain the needle tip contour;

[0112] Determine whether the needle tip taper angle and initial wear amount meet preset conditions according to the needle tip profile;

[0113] If yes, the following steps are performed: controlling the rock sample to be tested and the test needle to move relative to each other along a first preset direction so that the tip of the test needle forms a wear end surface extending along the first direction;

[0114] If not, a prompt message is generated.

[0115] When the cone angle is greater than 90°, a lot of wear debris will accumulate at the tip of the worn test needle, which is not conducive to subsequent measurements; when the cone angle is less than 90°, the material available for wear at the tip of the needle will be reduced, which is also not conducive to subsequent measurements. Combined with the processing technology of existing test needles, the angle deviation can be ≤0.5°. Optionally, when the needle tip cone angle is within a preset range, it is determined that the needle tip cone angle meets the preset conditions. The preset range is 89.5° to 90.5°.

[0116] According to the International Society of Rock Mechanics (ISRM) classification standard, the CAI value of 5.0 corresponding to extremely high abrasiveness is used as a reference. At this time, the circular diameter corresponding to the wear surface is 0.5mm, which can characterize the wear amount of the needle tip. When the needle tip cone angle is within the preset range, the theoretical change of the wear amount of the needle tip is ≤0.005mm, which has little effect on the CAI classification. Therefore, when the initial wear amount of the test needle is ≤0.01mm, it is determined that the initial wear amount meets the preset conditions.

[0117] Please refer to Fig.10 , Fig.11 and Fig.12. The rock abrasiveness testing method provided in the present application can be applied to a rock abrasiveness index testing system, which includes a test needle wear measuring device 10 and a rock friction testing device 30, wherein the rock friction testing device 30 includes a first clamping unit 301 and a first driving unit 302, wherein the first clamping unit 301 is used to clamp the test needle; the first driving unit 302 is used to drive the rock sample to be tested and the test needle clamped by the first clamping unit 301 to move relative to each other along a first preset direction, so that the test needle produces a worn end surface extending along the first direction; the test needle wear measuring device 10 includes a second clamping unit 1, a visual acquisition unit 2 and a second driving unit 3, wherein the second clamping unit 1 is used to clamp the test needle; the second driving unit 3 is used to drive the second clamping unit 1 to rotate, so that the second clamping unit 1 drives the test needle to rotate; the visual acquisition unit 2 is arranged opposite to the second clamping unit 1 in a second reverse direction, and the visual acquisition unit 2 and the second clamping unit 1 photograph the worn end surface of the test needle exposed to the second clamping unit 1 in a direction perpendicular to the axis of the test needle and parallel to the indication direction displayed by the identification mark.

[0118] The visual acquisition unit 2 is arranged opposite to the needle tip along the Y-axis, and the second clamping unit clamps the test needle along the X-axis, the X-axis is the horizontal direction, the Y-axis is the vertical direction, and the X-axis and the Y-axis are arranged vertically. The visual acquisition unit 2 includes a light source 21 and an optical module 22, and the light source 21 and the optical module 22 are arranged on opposite sides of the needle tip along the Y-axis. The light source 21 provides light to illuminate the needle tip exposed by the second clamping unit 1, so as to facilitate the optical module 22 to shoot the needle tip. The light source 21 can be a parallel light source, and the optical module 22 can be a camera with a telecentric lens, so that the obtained image has high accuracy.

[0119] After the needle tip is worn, the worn end surface may present various irregular shapes, making it difficult to measure the worn end surface. The second clamping unit 1 can be driven to rotate by the second driving unit 3 so that the test needle can rotate along the X-axis, thereby photographing the needle tip with the worn end surface from multiple angles. In one embodiment, four shooting angles are set, and two of them are set correspondingly, one is for viewing the worn end surface from the front, one is for viewing the back of the worn end surface, and two are for viewing the worn end surface from the side.

[0120] Please refer to Fig.13 and Fig.14 The test needle wear measuring device 10 also includes a shell 4 and a positioning mark 5 arranged on the shell 4. The second clamping unit 1 and the second driving unit 3 are accommodated in the shell 4. The shell 4 has a first socket 41 corresponding to the second clamping unit 1. The positioning mark 5 is arranged around the first socket 41. The positioning mark 5 is used to correspond to the identification mark 203 on the main body of the test needle.

[0121] When the test needle is used to test the rock abrasiveness, it is necessary to move the test needle in a certain direction on the rock sample, so that the worn end surface on the test needle has a certain tilt direction. In order to ensure that the angle of the test needle inserted into the housing 4 is constant each time, the worn end surface faces a fixed direction. An identification mark 203 can be set on the end surface of the main body away from the needle tip. When the identification mark 203 corresponds to the positioning mark 5, it means that the angle of the test needle inserted into the receiving cavity 121 is correct. Fig.14 In the illustrated embodiment, the identification mark 203 is a vertical line, and the positioning mark 5 is a plurality of vertical lines extending along the diameter direction of the first plug hole 41. The identification mark 203 and the positioning mark 5 are on the same straight line, which indicates that the worn end surface of the test needle faces the visual acquisition unit 2. Of course, the identification mark 203 and the positioning mark 5 can also be in other forms.

[0122] Fig.15 A schematic diagram of the hardware structure of a rock abrasiveness index test system provided in an embodiment of the present application is shown.

[0123] The rock abrasiveness index test system may include a processor 1001 and a memory 1002 storing computer program instructions. The processor 1001 is communicatively connected with the rock friction test device 30 and the test needle wear measurement device 10 respectively.

[0124] Specifically, the processor 1001 may include a central processing unit (CPU), or an application specific integrated circuit (ASIC), or may be configured to implement one or more integrated circuits of the embodiments of the present application.

[0125] The memory 1002 may include a large capacity memory for data or instructions. By way of example and not limitation, the memory 1002 may include a hard disk drive (HDD), a floppy disk drive, a flash memory, an optical disk, a magneto-optical disk, a magnetic tape, or a universal serial bus (USB) drive or a combination of two or more of these. In appropriate cases, the memory 1002 may include a removable or non-removable (or fixed) medium. In appropriate cases, the memory 1002 may be inside or outside the integrated gateway disaster recovery device. In a specific embodiment, the memory 1002 is a non-volatile solid-state memory.

[0126] The memory may include read-only memory (ROM), random access memory (RAM), magnetic disk storage media devices, optical storage media devices, flash memory devices, electrical, optical or other physical / tangible memory storage devices. Thus, typically, the memory includes one or more tangible (non-transitory) computer-readable storage media (e.g., memory devices) encoded with software including computer-executable instructions, and when the software is executed (e.g., by one or more processors), it is operable to perform the operations described with reference to the method according to an aspect of the present disclosure.

[0127] The processor 1001 implements any one of the rock abrasiveness testing methods in the above embodiments by reading and executing computer program instructions stored in the memory 1002 .

[0128] In one example, the rock abrasiveness index test system may further include a communication interface 1003 and a bus 1010. The processor 1001, the memory 1002, and the communication interface 1003 are connected via the bus 1010 and communicate with each other.

[0129] The communication interface 1003 is mainly used to implement communication between various modules, devices, units and / or equipment in the embodiments of the present application.

[0130] Bus 1010 includes hardware, software or both, and the parts of rock abrasiveness index test system are coupled to each other. For example, but not limitation, bus may include accelerated graphics port (AGP) or other graphics bus, enhanced industrial standard architecture (EISA) bus, front side bus (FSB), hypertransport (HT) interconnection, industrial standard architecture (ISA) bus, infinite bandwidth interconnection, low pin count (LPC) bus, memory bus, micro channel architecture (MCA) bus, peripheral component interconnection (PCI) bus, PCI-Express (PCI-X) bus, serial advanced technology attachment (SATA) bus, video electronics standard association local (VLB) bus or other suitable bus or two or more of these combinations. In suitable cases, bus 1010 may include one or more buses. Although the present application embodiment describes and shows a specific bus, the present application considers any suitable bus or interconnection.

[0131] The rock abrasiveness index test system can be based on the above embodiment, thereby realizing the above rock abrasiveness test method and device.

[0132] In addition, in combination with the rock abrasiveness testing method in the above-mentioned embodiment, the embodiment of the present application may provide a computer storage medium for implementation. The computer storage medium stores computer program instructions; when the computer program instructions are executed by the processor, any one of the rock abrasiveness testing methods in the above-mentioned embodiment is implemented, and the same technical effect can be achieved. To avoid repetition, it will not be repeated here. Among them, the above-mentioned computer-readable storage medium may include a non-transitory computer-readable storage medium, such as a read-only memory (Read-Only Memory, referred to as ROM), a random access memory (Random Access Memory, referred to as RAM), a disk or an optical disk, etc., which are not limited here.

[0133] Based on the rock abrasiveness testing method provided in the above embodiment, the present application also provides a specific implementation of a rock abrasiveness testing device. Please refer to the following embodiment.

[0134] See first Fig.16 The rock abrasiveness testing device 900 provided in the embodiment of the present application includes:

[0135] The recognition module 901 is used to obtain a plurality of images of the needle tip of the test needle taken from different viewing angles, and perform image contour fitting on the needle tip in each image to obtain a wear contour, where the wear contour is the outer contour of the needle tip of the test needle;

[0136] A measurement module 902 is used to determine the turning points of the lines in the wear profile and measure the interval distance between the turning points of the lines;

[0137] Calculation module 903, used to generate rock abrasiveness parameters according to the spacing distance

[0138] As an implementation of the present application, the measurement module 902 includes:

[0139] A connection unit, used for setting the connection points of the curve and the straight line in the wear profile and the bending points of the broken line as line turning points;

[0140] The measurement unit used to measure the distance between the turning points of a line.

[0141] As an implementation of the present application, the identification module 901 includes:

[0142] An acquisition unit, used to acquire at least one of a front view image and a back view image of the worn end surface of the needle tip, and at least one of side view images on two opposite sides of the worn end surface of the needle tip;

[0143] The fitting unit is used to perform image contour fitting on the needle tip in the image to obtain the wear contour.

[0144] As an implementation of the present application, the calculation module 903 includes:

[0145] The average diameter of the circular surface is calculated according to at least one corresponding interval distance in the front view image and the back view image, and at least one corresponding interval distance in the two side view images, and the rock abrasiveness parameter is generated according to the average diameter of the circular surface.

[0146] As an implementation of the present application, the rock abrasiveness testing device 900 further includes:

[0147] A wear module, used for controlling the relative movement of the rock sample to be tested and the test needle along a first preset direction, so that the tip of the test needle forms a wear end surface extending along the first direction, the first direction is arranged to intersect with the first preset direction, and the first preset direction is consistent with the indication direction displayed by the identification mark on the test needle;

[0148] The acquisition unit is also used to capture a front view image and / or a back view image of the worn end surface along a direction perpendicular to the axis of the test needle and parallel to the indication direction displayed by the identification mark;

[0149] The test needle is controlled to rotate to a preset angle and a side view image of the worn end surface is obtained.

[0150] The rock abrasiveness testing device provided in the embodiment of the present invention can implement each step in the above method embodiment, and will not be described again here to avoid repetition.

[0151] In addition, an embodiment of the present application further provides a computer program product, including computer program instructions, which can implement the steps and corresponding contents of the aforementioned method embodiment when the computer program instructions are executed by a processor.

[0152] It should be clear that the present application is not limited to the specific configuration and processing described above and shown in the figures. For the sake of simplicity, a detailed description of the known method is omitted here. In the above embodiments, several specific steps are described and shown as examples. However, the method process of the present application is not limited to the specific steps described and shown, and those skilled in the art can make various changes, modifications and additions, or change the order between the steps after understanding the spirit of the present application.

[0153] The functional blocks shown in the above block diagram can be implemented as hardware, software, firmware or a combination thereof. When implemented in hardware, it can be, for example, an electronic circuit, an application specific integrated circuit (ASIC), appropriate firmware, a plug-in, a function card, etc. When implemented in software, the elements of the present application are programs or code segments that are used to perform the required tasks. The program or code segment can be stored in a machine-readable medium, or transmitted on a transmission medium or a communication link by a data signal carried in a carrier wave. "Machine-readable medium" can include any medium capable of storing or transmitting information. Examples of machine-readable media include electronic circuits, semiconductor memory devices, ROM, flash memory, erasable ROM (EROM), floppy disks, CD-ROMs, optical disks, hard disks, optical fiber media, radio frequency (RF) links, etc. The code segment can be downloaded via a computer network such as the Internet, an intranet, etc.

[0154] It should also be noted that the exemplary embodiments mentioned in this application describe some methods or systems based on a series of steps or devices. However, this application is not limited to the order of the above steps, that is, the steps can be performed in the order mentioned in the embodiment, or in a different order from the embodiment, or several steps can be performed simultaneously.

[0155] Aspects of the present disclosure are described above with reference to the flowchart and / or block diagram of the method, device and computer program product according to the embodiment of the present disclosure. It should be understood that each box in the flowchart and / or block diagram and the combination of each box in the flowchart and / or block diagram can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, or other programmable data processing device to produce a machine so that these instructions executed by the processor of the computer or other programmable data processing device enable the implementation of the function / action specified in one or more boxes of the flowchart and / or block diagram. Such a processor can be, but is not limited to, a general-purpose processor, a special-purpose processor, a special application processor, or a field programmable logic circuit. It can also be understood that each box in the block diagram and / or flowchart and the combination of boxes in the block diagram and / or flowchart can also be implemented by dedicated hardware that performs a specified function or action, or can be implemented by a combination of dedicated hardware and computer instructions.

[0156] The above are only specific implementation methods of the present application. Those skilled in the art can clearly understand that for the convenience and simplicity of description, the specific working processes of the systems, modules and units described above can refer to the corresponding processes in the aforementioned method embodiments, and will not be repeated here. It should be understood that the protection scope of the present application is not limited to this. Any technician familiar with the technical field can easily think of various equivalent modifications or replacements within the technical scope disclosed in this application, and these modifications or replacements should be included in the protection scope of this application.

Claims

1. A rock abrasiveness testing method, characterized in that the method include: Acquire multiple images of the needle tip of the test needle taken from different viewing angles, perform image contour fitting on the needle tip in the images respectively, and obtain a wear contour, wherein the wear contour is the outer contour of the needle tip of the test needle; Determine a line turning point in the wear profile, and measure a size parameter of the wear profile according to the line turning point; generating a rock abrasiveness parameter according to the size parameter; Wherein, the determining of the line turning point in the wear profile and measuring the size parameter of the wear profile according to the line turning point comprises: Setting the connection points of the curve and the straight line in the wear profile, and the bending points of the broken line as line turning points; Measuring the interval distance between the turning points of the line; The step of acquiring a plurality of images of the needle tip of the test needle taken from different viewing angles, and performing image contour fitting on the needle tip in the images to obtain the wear contour comprises: Acquire at least one of a front view image and a back view image of the worn end surface of the needle tip, and acquire at least one of side view images on opposite sides of the worn end surface of the needle tip; Performing image contour fitting on the needle tip parts in the image respectively to obtain a wear contour; The step of generating the rock abrasiveness parameter according to the size parameter comprises: The average circular surface diameter is calculated based on the spacing distance corresponding to at least one of the front view image and the back view image, and the spacing distance corresponding to at least one of the two side view images, and the rock abrasiveness parameter is generated based on the average circular surface diameter.

2. The rock abrasiveness testing method according to claim 1, characterized in that: The method of acquiring a plurality of images of the needle tip of the test needle taken from different viewing angles and performing image contour fitting on the needle tip in the images respectively to obtain the wear contour comprises: Controlling the rock sample to be tested and the test needle to move relative to each other along a first preset direction, so that the tip of the test needle forms a wear end surface extending along the first direction, the first direction intersects with the first preset direction, and the first preset direction is consistent with the indication direction displayed by the identification mark on the test needle; The step of obtaining at least one of the front view image and the back view image of the worn end surface of the needle tip, and obtaining at least one of the side view images on opposite sides of the worn end surface of the needle tip comprises: Taking a front view image and / or a back view image of the worn end surface along a direction perpendicular to the axis of the test needle and parallel to the indication direction displayed by the identification mark; The test needle is controlled to rotate at a preset angle, and a side view image of the worn end surface is obtained.

3. A rock abrasiveness testing device, characterized in that: include: A recognition module, used to obtain a plurality of images of the needle tip of the test needle taken from different viewing angles, and perform image contour fitting on the needle tip in the images to obtain a wear contour, wherein the wear contour is the outer contour of the needle tip of the test needle; A measuring module, used to determine a line turning point in the wear profile, and measure a size parameter of the wear profile according to the line turning point; A calculation module, used for generating rock abrasiveness parameters according to the size parameters; Wherein, the measurement module comprises: A connection unit, used to set the connection points of the curve and the straight line in the wear profile, and the bending points of the broken line as line turning points; A measuring unit, used for measuring the interval distance between the turning points of the line; The identification module comprises: An acquisition unit, used to acquire at least one of a front view image and a back view image of the worn end surface of the needle tip, and at least one of side view images on two opposite sides of the worn end surface of the needle tip; A fitting unit, used for performing image contour fitting on the needle tip in the image to obtain a wear contour; The calculation module is also used to calculate the average circular surface diameter based on the spacing distance corresponding to at least one of the front view image and the back view image, and the spacing distance corresponding to at least one of the two side view images, and generate the rock abrasiveness parameter based on the average circular surface diameter.

4. A rock abrasiveness index test system, characterized in that: The rock abrasiveness index test system comprises: a rock friction test device, a test needle wear measuring device, a processor and a memory storing computer program instructions, wherein the processor is respectively connected to the rock friction test device and the test needle wear measuring device for communication; When the processor executes the computer program instructions, the rock abrasiveness testing method according to any one of claims 1 to 2 is implemented.

5. The rock abrasiveness index test system according to claim 4, characterized in that: The rock friction test device comprises: A first clamping unit, used for clamping the test needle; a first driving unit, used for driving the rock sample to be tested and the test needle clamped by the first clamping unit to move relative to each other along a first preset direction, so that the test needle generates a worn end surface extending along the first direction, the first direction intersects with the first preset direction, and the first preset direction is consistent with an indication direction displayed by an identification mark on the test needle; And the test needle wear measurement device includes: A second clamping unit, used for clamping the test needle; A second driving unit, used for driving the second clamping unit to rotate, so that the second clamping unit drives the test needle to rotate; The visual acquisition unit, together with the second clamping unit, photographs the worn end surface of the test needle exposed from the second clamping unit in a direction perpendicular to the axis of the test needle and parallel to the indication direction displayed by the identification mark.

6. A computer storage medium, characterized in that: The computer storage medium stores computer program instructions, which, when executed by a processor, implement the rock abrasiveness testing method according to any one of claims 1 to 2.

7. A computer program product, characterized in that The computer program product comprises computer program instructions, and when the computer program instructions are executed by a processor, the rock abrasiveness testing method according to any one of claims 1 to 2 is implemented.

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