A detection method, a detection controller and a detection device for a multi-wire cutting grooved pulley

Abstract

The present invention relates to the technical field of grooved wheel detection methods, and particularly to a detection method, a detection controller and a detection device for a multi-wire cutting grooved wheel. Among them, the method includes: moving the grooved wheel to a preset shooting area according to a first preset trajectory; acquiring a real-time image of the grooved wheel in the shooting area; selecting a target measurement area on the real-time image; moving the grooved wheel according to a second preset trajectory so that the target measurement area is at the shooting point; acquiring displacement data when the grooved wheel moves; associating the size information of the measurement area according to the displacement data; performing mapping analysis on the image of the measurement area according to the size information to detect the size of the measurement area. The present invention precisely detects the size of the grooved wheel through a camera measurement method, can discover possible size anomalies in the manufacturing process, and reduce the impact of poor grooving size on product processing scrap.

Description

Technical Field

[0001] The present invention relates to the technical field of grooved pulley detection methods, and in particular to a detection method, a detection controller and a detection device for a multi-wire cutting grooved pulley. Background Art

[0002] Currently, the main chip substrate materials are sapphire and silicon carbide substrate wafers. Because the hardness of the substrate wafer material is extremely high, the multi-wire cutting method using diamond wires is generally adopted in the industry for cutting.

[0003] Specifically, the steps of the multi-wire cutting method are as follows: Diamond powder of a certain particle size is evenly electroplated on the surface of the bare wire to enable the steel wire to form sufficient cutting force. On the circumferential surfaces of two grooved pulleys (the material can be selected as polyurethane material), equally spaced grooves are turned out using a numerical control lathe. The diamond wires are distributed and wound in the grooves. The two grooved pulleys are driven to rotate by a high-speed servo motor. The cutting steel wire is guided by a wire guide pulley to form a cutting diamond wire mesh with a certain tension on the grooved pulleys. The crystal bar to be processed is bonded to the material plate according to the requirements of the crystal angle direction. The material plate is clamped on the workbench of the wire cutting machine, and then the feeding of the crystal bar is realized through the up-and-down movement of the workbench. A sawing-type cutting force is formed through the high-speed pulling of the cutting steel wire, so that the cutting diamond powder abrasive attached to the cutting steel wire acts on the surface of the crystal bar with a continuous and stable cutting force field. The crystal bar moves from top to bottom at a certain speed to generate a continuous pressure on the cutting steel wire. Under the action of the pressure, cutting abrasives such as diamond are pressed into the surface of the crystal bar, and the crystal bar is cut into substrate wafers with uniform thickness.

[0004] Actually, during the grooving process of the grooved pulley, there are situations such as the inconsistency between the positioning reference for clamping before turning and the design reference of the grooved pulley, the inconsistent wear conditions of the turning tool, and human operation errors, resulting in the grooved pulley after grooving not meeting the usage requirements, the thickness of the cut substrate wafer being uneven, the total thickness variation (TTV) being large, and the warp and bow being abnormal. The traditional inspection method is visual inspection using a microscope, etc. None of the existing detection schemes can quickly and accurately measure the dimensional information of the grooved pulley. Due to the lack of an effective detection method, after the grooved pulley is grooved, the dimensions such as the angle and depth of the groove and the groove pitch cannot be accurately detected, resulting in the situation that the cut substrate wafer does not meet the product specification requirements and is scrapped. Summary of the Invention

[0005] Embodiments of the present invention provide a detection method, a detection controller and a detection device for a multi-wire cutting grooved pulley to solve the technical problem that the relevant dimensions of the grooves obtained after grooving the grooved pulley in the prior art cannot be accurately detected.

[0006] To solve the above technical problem, on the one hand, embodiments of the present invention provide a detection method for a multi-wire cutting grooved pulley, and the method includes:

[0007] Move the Geneva wheel to a preset shooting area according to a first preset trajectory;

[0008] Obtain a real-time image of the Geneva wheel within the shooting area;

[0009] Select a target measurement area on the real-time image;

[0010] Move the Geneva wheel according to a second preset trajectory so that the target measurement area is at the shooting point;

[0011] Obtain displacement data when the Geneva wheel moves;

[0012] Associate the dimension information of the measurement area according to the displacement data;

[0013] Perform mapping analysis on the image of the measurement area according to the dimension information to detect the size of the measurement area.

[0014] Optionally, in the step of performing mapping analysis on the image of the measurement area according to the dimension information, it includes:

[0015] Select several marker points in the image of the measurement area;

[0016] Generate a straight line through several marker points, select two intersecting straight lines to obtain the intersection points, and calculate the distance between the two intersection points after obtaining the two intersection points; and / or, select two straight lines to calculate the included angle between the two straight lines;

[0017] Or, generate a circle through several marker points, select the circle to calculate its radius value and generate the center of the circle, and calculate the distance between two adjacent centers of the circle.

[0018] Optionally, there are two measurement areas, and the two measurement areas are the two end parts on the side of the Geneva wheel. In the step of performing mapping analysis on the image of the measurement area according to the dimension information, it includes:

[0019] Select at least two first marker points on the side edge of the Geneva wheel and generate a first straight line through the at least two first marker points;

[0020] Select at least two second marker points on the end face of the Geneva wheel and generate a second straight line through the at least two second marker points;

[0021] Select the first straight line and the second straight line to obtain a first intersection point;

[0022] Select at least two third marking points on the side of the groove on the sprocket wheel. For the groove, select the first one close to the end face of the sprocket wheel. For the side, select the side of the groove closest to the end face of the sprocket wheel. Generate a third straight line through at least two of the third marking points;

[0023] Select the first straight line and the third straight line to obtain a second intersection point;

[0024] After selecting the first intersection point and the second intersection point, measure the distance between the first intersection point and the second intersection point to obtain a first spacing;

[0025] Compare the first spacings measured in the two measurement regions.

[0026] Optionally, the measurement region is the groove on the sprocket wheel. In the step of performing mapping analysis on the image of the measurement region according to the dimension information, it includes:

[0027] Select at least two fourth marking points on one side of the groove. Generate a fourth straight line through at least two of the fourth marking points;

[0028] Select at least two fifth marking points on the other side of the groove. Generate a fifth straight line through at least two of the fifth marking points;

[0029] Select the fourth straight line and the fifth straight line and calculate the included angle between the fourth straight line and the fifth straight line.

[0030] Optionally, the measurement region is the groove on the sprocket wheel. In the step of performing mapping analysis on the image of the measurement region according to the dimension information, it includes:

[0031] Select several sixth marking points at the bottom arc position of the groove. Generate a first circle through several of the sixth marking points. Select the first circle, calculate its radius value and generate a first center;

[0032] Select several seventh marking points at the bottom arc of another adjacent groove. Generate a second circle through several of the seventh marking points. Select the second circle, calculate its radius value and generate a second center;

[0033] Calculate the distance between the first center and the second center to obtain a second spacing.

[0034] Optionally, the measurement region is the groove on the sprocket wheel. In the step of performing mapping analysis on the image of the measurement region according to the dimension information, it includes:

[0035] Select a number of eighth marking points at the bottom arc position of the groove, generate a third circle through the number of eighth marking points, and select the quadrant points at the bottom end of the third circle;

[0036] Select at least two ninth marking points on the side edge of the sheave, and generate a sixth straight line through the at least two ninth marking points;

[0037] Calculate the distance between the quadrant points and the sixth straight line to obtain a third spacing.

[0038] On the other hand, an embodiment of the present invention further provides a detection controller for a multi-wire cutting sheave, including:

[0039] A first moving module for moving the sheave to a preset shooting area according to a first preset trajectory;

[0040] A shooting module for acquiring a real-time image of the sheave in the shooting area;

[0041] A selection module for selecting a target measurement area on the real-time image;

[0042] A second moving module for moving the sheave according to a second preset trajectory so that the target measurement area is at the shooting point;

[0043] A displacement data module for acquiring displacement data when the sheave moves;

[0044] An association module for associating the dimension information of the measurement area according to the displacement data; and

[0045] A mapping module for performing mapping analysis in the image of the measurement area according to the dimension information.

[0046] Optionally, the mapping module includes:

[0047] A marking point unit for selecting a number of marking points in the image of the measurement area;

[0048] A first calculation unit for generating a straight line through a number of marking points, selecting two intersecting straight lines to obtain the intersection points, and calculating the distance between the two intersection points after obtaining the two intersection points; and / or, selecting two of the straight lines to calculate the included angle between the two straight lines;

[0049] A second calculation unit for generating a circle through a number of marking points, selecting the circle to calculate its radius value and generate the center of the circle, and calculating the distance between two adjacent centers of the circle.

[0050] On yet another aspect, an embodiment of the present invention further provides a detection device for a multi-wire cutting sheave, including:

[0051] A base;

[0052] A displacement mechanism, which is arranged on the base;

[0053] A displacement detection mechanism, which is arranged on the displacement mechanism to obtain displacement data of the displacement mechanism;

[0054] Two bearing blocks, which are slidably arranged on the displacement mechanism, and two ends of the grooved pulley are respectively positioned on the two bearing blocks;

[0055] A camera mechanism, which is arranged above the displacement mechanism;

[0056] An operation host, which has a display screen; and

[0057] The controller, the display screen, the camera mechanism, the displacement mechanism and the displacement detection mechanism are all connected to the controller.

[0058] Optionally, bearing grooves are arranged on the two bearing blocks, a central shaft is penetrated through a central hole of the grooved pulley, and two ends of the central shaft are respectively borne in the two bearing grooves;

[0059] And / or, the camera mechanism includes a continuously variable zoom objective lens and a CCD color camera lens built in the continuously variable zoom objective lens;

[0060] And / or, the displacement mechanism includes an X-axis displacement module, a moving workbench and a Y-axis displacement module, the X-axis displacement module is arranged on the base; the moving workbench is slidably arranged on the base, and the X-axis displacement module drives the moving workbench to slide along the X-axis; the Y-axis displacement module is arranged on the moving workbench, and the two bearing blocks are slidably arranged on the moving workbench, and the Y-axis displacement module drives the two bearing blocks to slide along the Y-axis;

[0061] And / or, the displacement detection mechanism includes an X-axis grating scale and a Y-axis grating scale, and the X-axis grating scale and the Y-axis grating scale respectively obtain X-axis displacement data and Y-axis displacement data of the displacement mechanism.

[0062] Implementing the embodiments of the present invention has the following beneficial effects: The present invention precisely detects the size of the grooved pulley through a camera measurement method, can find possible size abnormalities in the manufacturing process, reduce the impact of poor grooving size on product processing scrap, and at the same time can also be used to judge the main reasons for the abnormal grooving of the grooved pulley for investigation and correction; the present invention can complete the detection work with high efficiency, save the operation time of the detection personnel, and improve the work efficiency. Description of the Drawings

[0063] Figure 1It is a flowchart of a detection method for a multi-wire cutting sheave of the present invention;

[0064] Figure 2 It is a schematic structural diagram of a detection controller for a multi-wire cutting sheave of the present invention;

[0065] Figure 3 It is a schematic structural diagram of a detection device for a multi-wire cutting sheave of the present invention;

[0066] Figure 4 It is a schematic structural diagram of the sheave in a detection method for a multi-wire cutting sheave of the present invention;

[0067] Figure 5 It is a schematic diagram of a detection method for a multi-wire cutting sheave of the present invention;

[0068] Figure 6 is Figure 5 a partial enlarged view of the L area shown in Detailed implementation manners

[0069] To make the objectives, technical solutions and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings. It is hereby declared that the orientation terms such as up, down, left, right, front, back, inside, outside, etc. that appear or will appear in the text of the present invention are only based on the accompanying drawings of the present invention, and they do not specifically limit the present invention.

[0070] In the present invention, unless otherwise clearly defined and limited, terms such as "connection" and "fixation" shall be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements or the interaction relationship between two elements, unless otherwise clearly limited. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0071] In the present invention, descriptions such as "first" and "second" are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In addition, the technical solutions between various embodiments can be combined with each other, but it must be based on the fact that those of ordinary skill in the art can implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the protection scope required by the present invention.

[0072] An embodiment of the present invention, referring to Figure 1 , provides a detection method for a multi-wire cutting sheave, including:

[0073] S101, Move the grooved pulley to a preset shooting area according to a first preset trajectory;

[0074] S102, Obtain a real-time image of the grooved pulley within the shooting area;

[0075] S103, Select a target measurement area on the real-time image;

[0076] S104, Move the grooved pulley according to a second preset trajectory so that the target measurement area is at the shooting point;

[0077] S105, Obtain displacement data when the grooved pulley moves;

[0078] S106, Correlate the size information of the measurement area according to the displacement data;

[0079] S107, Perform mapping analysis on the image of the measurement area according to the size information to detect the size of the measurement area.

[0080] The technical solution of the present invention precisely detects the size of the grooved pulley through a camera measurement method, can detect possible size abnormalities during the manufacturing process, reduce the impact of defective grooving sizes on product processing scrap, and at the same time is also used to determine the main reasons for abnormal grooving of the grooved pulley for troubleshooting and correction; the present invention can complete the detection work with high efficiency, save the working time of inspection personnel, and improve work efficiency.

[0081] The above-mentioned correlating the size information of the measurement area according to the displacement data is specifically as follows: First, select a feature point. When moving the grooved pulley according to the preset trajectory, measure the displacement size, including X-axis displacement data and Y-axis displacement data, and then calculate the moving distance of the feature point in the measurement image. For example, it moves a certain number of pixel points on the X-axis and a certain number of pixel points on the Y-axis, and through correlation, the actual size information is associated with the image information.

[0082] In another embodiment of the present invention, the step of performing mapping analysis on the image of the measurement area according to the size information in the detection method includes:

[0083] Select a number of marked points in the image of the measurement area;

[0084] Generate a straight line through a number of marked points, select two intersecting straight lines to obtain the intersection point, calculate the distance between the two intersection points after obtaining the two intersection points; and / or, select two straight lines to calculate the included angle between the two straight lines;

[0085] Or, generate a circle through a number of marked points, select the circle to calculate its radius value and generate the center of the circle, and calculate the distance between two adjacent centers of the circle.

[0086] The present invention selects marked points for aiming, constructs a straight line or a circle, and then obtains dimensional information such as straight-line distance, included angle, and circular distance by using the straight line or the circle. The present invention obtains dimensional information by means of geometric drawing on an image, and has the advantages of high accuracy and precise measurement, avoiding the disadvantages of easy measurement errors in automatic calculation and automatic recognition by software.

[0087] In another embodiment of the present invention, the measurement area of the detection method is two, and the two measurement areas are the two end portions of the side surface of the grooved pulley. The steps of mapping and analyzing in the image of the measurement area according to the dimensional information include:

[0088] Select at least two first marked points on the side edge of the grooved pulley, and generate a first straight line through the at least two first marked points;

[0089] Select at least two second marked points on the end face of the grooved pulley, and generate a second straight line through the at least two second marked points;

[0090] Select the first straight line and the second straight line to obtain a first intersection point;

[0091] Select at least two third marked points on the side of the groove on the grooved pulley. For the groove, select the first one close to the end face of the grooved pulley, and for the side, select the side of the groove closest to the end face of the grooved pulley. Generate a third straight line through the at least two third marked points;

[0092] Select the first straight line and the third straight line to obtain a second intersection point;

[0093] After selecting the first intersection point and the second intersection point, measure the distance between the first intersection point and the second intersection point to obtain a first spacing;

[0094] Compare the first spacings measured in the two measurement areas.

[0095] In this embodiment, the two measurement areas respectively correspond to the starting and ending positions of the grooving of the grooved pulley, that is, the first groove and the starting end face of the grooved pulley, and the last groove and the end face of the grooved pulley.

[0096] The first spacings measured in the two measurement areas should be consistent (the error is within 0.20 mm) to ensure that the crystal orientation angle does not shift after the substrate wafer is cut; if the tolerance is exceeded, it indicates that the positioning during the grooving of the grooved pulley is inaccurate and needs to be corrected and adjusted.

[0097] In another embodiment of the present invention, the measurement area of the detection method is the groove on the grooved pulley. The steps of mapping and analyzing in the image of the measurement area according to the dimensional information include:

[0098] Select at least two fourth marked points on one side of the groove, and generate a fourth straight line through the at least two fourth marked points;

[0099] Select at least two fifth marked points on the other side edge of the groove, and generate a fifth straight line through the at least two fifth marked points;

[0100] Select the fourth straight line and the fifth straight line, and calculate the included angle between the fourth straight line and the fifth straight line. Preferably, check 2 - 5 positions where the grooved pulley rotates at different circumferential parts to confirm whether the grooving size of the entire grooved pulley meets the requirements, with a general error within 0.05°; the main reasons for the angle deviation are the wear of the grooving turning tool or the incorrect selection of the turning tool angle.

[0101] In another embodiment of the present invention, the measurement area of the detection method is the groove on the grooved pulley. The mapping analysis steps in the image of the measurement area according to the dimension information include:

[0102] Select a number of sixth marked points at the bottom arc position of the groove, generate a first circle through the number of sixth marked points, select the first circle, calculate its radius value and generate a first center;

[0103] Select a number of seventh marked points at the bottom arc of an adjacent groove, generate a second circle through the number of seventh marked points, select the second circle, calculate its radius value and generate a second center;

[0104] Calculate the distance between the first center and the second center to obtain a second distance, that is, the groove pitch. The main reason for the groove pitch error is the incorrect program selection or setting. The specific error requirements can be set according to the actual process requirements.

[0105] In another embodiment of the present invention, the measurement area of the detection method is the groove on the grooved pulley. The mapping analysis steps in the image of the measurement area according to the dimension information include:

[0106] Select a number of eighth marked points at the bottom arc position of the groove, generate a third circle through the number of eighth marked points, and select the quadrant points at the bottom end of the third circle;

[0107] Select at least two ninth marked points on the side edge of the grooved pulley, and generate a sixth straight line through the at least two ninth marked points;

[0108] Calculate the distance between the quadrant point and the sixth straight line to obtain a third distance. The third distance is the groove depth. The main reason for the error is the incorrect program selection or setting. The specific error requirements can be set according to the actual process requirements.

[0109] Refer to Figure 2, An embodiment of the present invention further provides a detection controller 19 for a multi-wire cutting sheave, including a first moving module 191, a photographing module 192, a selection module 193, a second moving module 194, a displacement data module 195, a correlation module 196, and a surveying and mapping module 197. The first moving module 191 is configured to move the sheave to a preset photographing area according to a first preset trajectory. The photographing module 192 is configured to obtain a real-time image of the sheave in the photographing area. The selection module 193 is configured to select a target measurement area on the real-time image. The second moving module 194 moves the sheave according to a second preset trajectory so that the target measurement area is at the photographing point. The displacement data module 195 is configured to obtain displacement data when the sheave moves. The correlation module 196 correlates the dimension information of the measurement area according to the displacement data. The surveying and mapping module 197 performs surveying and mapping analysis on the image of the measurement area according to the dimension information.

[0110] In another embodiment of the present invention, the surveying and mapping module 197 in the detection controller includes a marking point unit, a first calculation unit, and a second calculation unit.

[0111] The marking point unit is configured to select a plurality of marking points in the image of the measurement area.

[0112] The first calculation unit is configured to generate a straight line through a plurality of marking points, select two intersecting straight lines to obtain an intersection point, calculate the distance between the two intersection points after obtaining the two intersection points; and / or select two straight lines to calculate the included angle between the two straight lines.

[0113] The second calculation unit is configured to generate a circle through a plurality of marking points, select the circle to calculate its radius value and generate a center of the circle, and calculate the distance between two adjacent centers of the circle.

[0114] Refer to Figure 3 , An embodiment of the present invention further provides a detection device 1 for a multi-wire cutting sheave, including a base 18, a displacement mechanism 12, a displacement detection mechanism, two bearing blocks 111, a photographing mechanism 13, an operation host 15, and a controller 19. The displacement mechanism 12 is arranged on the base 1. The displacement detection mechanism is arranged on the displacement mechanism 12 to obtain displacement data of the displacement mechanism 12. The two bearing blocks 111 are slidably arranged on the displacement mechanism 12, and both ends of the sheave 2 are respectively positioned on the two bearing blocks 111. The photographing mechanism 13 is arranged above the displacement mechanism 12. The operation host 15 has a display screen 14. The display screen 14, the photographing mechanism 13, the displacement mechanism 12, and the displacement detection mechanism are all connected to the controller 19.

[0115] In another embodiment of the present invention, bearing grooves 112 are provided on the two bearing blocks 111 of the detection device. A central shaft 21 passes through the central hole of the sheave 2, and both ends of the central shaft 21 are respectively carried in the two bearing grooves 111.

[0116] In another embodiment of the present invention, the imaging mechanism 13 of the detection device includes a continuously variable zoom objective lens 131 and a CCD color imaging lens built in the continuously variable zoom objective lens. Preferably, the magnification range of the continuously variable zoom objective lens 131 is 0.5X - 10X, and the magnification range of the CCD color imaging lens is 20X - 150X. It should be noted that the imaging module 13 is driven to zoom by the Z-axis motor 132.

[0117] In another embodiment of the present invention, the displacement mechanism 12 of the detection device includes an X-axis displacement module, a moving workbench 122 and a Y-axis displacement module. The X-axis displacement module is arranged on the base 18. The moving workbench 122 is slidably arranged on the base 18, and the X-axis displacement module drives the moving workbench 122 to slide along the X-axis. The Y-axis displacement module is arranged on the moving workbench 122, and two bearing blocks 111 are slidably arranged on the moving workbench 122. The Y-axis displacement module drives the two bearing blocks 111 to slide along the Y-axis.

[0118] The Y-axis displacement module includes a Y-axis motor 121, a Y-axis lead screw nut and a Y-axis slider guide. The Y-axis motor 121 is drivingly connected to the Y-axis lead screw nut, the Y-axis lead screw nut is connected to the moving workbench 122, and the moving workbench 122 is slidably connected to the Y-axis slider guide. The X-axis displacement module includes an X-axis motor 123, an X-axis lead screw nut, an X-axis slider guide and left and right sliding plates. The left and right sliding plates are arranged on the moving workbench 122. The X-axis lead screw nut is drivingly connected to the left and right sliding plates. The X-axis motor 123 is connected to the X-axis lead screw nut. The left and right sliding plates are also slidably connected to the X-axis slider guide. The two bearing blocks 111 are respectively fixed on the left and right sliding plates.

[0119] In another embodiment of the present invention, the displacement detection mechanism of the detection device includes an X-axis grating scale and a Y-axis grating scale. The X-axis grating scale and the Y-axis grating scale respectively acquire the X-axis displacement data and the Y-axis displacement data of the displacement mechanism.

[0120] Preferably, horizontal adjustment screws are respectively installed at the four feet under the base 18 to ensure the horizontal accuracy and stability of the detection device 1. There is a marble platform on the top surface of the base 18, which serves as the base for carrying the entire detection device 1 to ensure that the mechanism will not deform and the middle of the base will not sag. The base 16 of the detection device 1 is placed at the middle position of the front, back, left and right on the marble platform.

[0121] The high-precision moving worktable 122 is above the base 16 of the detection device 1. It moves back and forth by means of a Y-axis slider guide rail arranged on each of the left and right sides inside the base 16 of the detection device 1. By driving the Y-axis motor 121 through the control switch, the moving worktable 122 can move back and forth (in the Y-axis direction). An Y-axis grating scale is installed in the front-back direction. Above the base 16, a dust-proof telescopic baffle is installed to prevent dust and sundries from falling into the slider guide rail. The backward (towards the operator) moving stroke of the moving worktable 122 makes the entire worktable surface outside the detection head, facilitating the placement of the hoisting sheave 2 onto the bearing block 111 during detection. The position below the moving worktable 122 is a glass plate, and an LED contour light cold light source is arranged below it, whose brightness can be adjusted.

[0122] Two bearing blocks 111 are installed on the left and right sliding plates of the moving worktable 122. They move left and right by means of a precision slider guide rail arranged on each of the front and back sides inside the moving support platform. By driving the X-axis motor 123 through the control switch, the left and right sliding plates can move left and right. The X-axis linear guide rail adopts an upper-mounted design, which conforms to the best stress principle of the guide rail slider, featuring high precision and stable operation. An X-axis grating scale is installed in the left-right direction. Above the moving worktable 122, a dust-proof telescopic baffle is installed to prevent dust and sundries from falling into the slider guide rail. The left-right moving stroke of the moving worktable 122 is greater than the actual detection length of the sheave 2. When detecting the sheave 2, the central shaft 21 is inserted, and both sides are placed on the two bearing blocks 111, keeping the measuring surface of the sheave 2 horizontal with the worktable surface, and the sheave 2 can be rotated to achieve multi-position circumferential detection.

[0123] In the direction perpendicular to the rear of the base 16 of the detection device 1, a column 17 integrally formed with the base 16 is designed. Above the worktable vertically, a continuously variable zoom objective lens 131 for downward detection is installed, with a magnification range of 0.5X - 10X. Inside, a high-resolution CCD color camera lens is also set, with a magnification of 20X - 150X. There is a three-ring LED cold light source inside the continuously variable zoom objective lens 131, and the detection accuracy is 0.1um. The detection accuracy of the entire detection mechanism is ≤0.5um / 300mm (L). By pressing the control switch button, the continuously variable zoom objective lens 131 can be driven to move up and down to complete detection focusing.

[0124] On the right side of the detection device 1 are the computer mainframe 15 and the color display screen. After being illuminated by the contour light generated below the moving worktable 122, the image is captured through the zoom objective lens and the camera lens, and then transmitted to the display screen through the terminal. Then, with the crosshair generator, aiming and measurement of the object to be measured are carried out based on the video crosshair generated on the display screen. The moving worktable 122 drives the grating scale to move in the X and Y axis directions, and the data is processed by the multi-functional data processor and measured and analyzed by the 2D measurement and analysis software installed in the computer mainframe 15.

[0125] This detection device is used for the image measurement of the Geneva wheel 2, which can complete the detection work efficiently, save the operation time of the detection personnel, and improve the work efficiency. For the specific implementation or usage method of this detection device, reference can be made to the above detection method, which will not be elaborated here one by one.

[0126] To further understand the present invention, the preferred embodiments of the present invention will be described below in conjunction with embodiments. However, it should be understood that these descriptions are only for further explaining the features and advantages of the present invention, rather than limiting the claims of the present invention.

[0127] Embodiment 1

[0128] With reference to Figures 3 to 6 , a detection method for a multi-wire cutting Geneva wheel in this embodiment is as follows:

[0129] Step 1. Hoist the Geneva wheel 2:

[0130] (1) Insert a standard central shaft 21 into the central hole of the grooved Geneva wheel 2 that has been grooved, hoist the Geneva wheel 2, drive the Y-axis motor 121 through the control switch, move the moving workbench 122 towards the operator's direction to avoid the imaging module 13, and then place the hoisted Geneva wheel 2 on the moving workbench 122. Both ends of the central shaft 21 are respectively placed on the left and right bearing blocks 111.

[0131] (2) Drive the Y-axis motor 121 through the control switch to move the moving workbench 122 backward, and adjust it back and forth so that the middle position of the Geneva wheel 2 is exactly vertically below the continuously variable zoom objective lens 131.

[0132] Step 2. Determine the detection area:

[0133] (1) Measurement of the start and end position dimensions: For the first groove on the Geneva wheel 2 and the end face adjacent to the first groove, as well as the last groove on the Geneva wheel 2 and the end face adjacent to the last groove, the actual detection requirement is that the start and end positions of the grooving of the Geneva wheel should be exactly the same relative to the two end faces of the Geneva wheel to ensure that the crystal orientation angle after the cutting of the substrate film will not shift; if it is out of tolerance, it means that the positioning during the grooving of the Geneva wheel is inaccurate and needs to be corrected and adjusted.

[0134] (2) Measurement of the groove 22 dimensions. Generally, 2 - 5 positions will be checked. Rotate the Geneva wheel 2 at different circumferential parts to confirm whether the grooving dimensions of the entire Geneva wheel 2 meet the requirements.

[0135] Step 3. Detection of the Geneva wheel dimensions:

[0136] (1) Starting and ending position measurement: Drive the X-axis motor 123 and Y-axis motor 121 through the control switch to move the continuous zoom objective lens 131 above the position of the first measurement area H (measure separately on the left and right sides according to the following steps), and then drive the Z-axis motor 132 through the control switch to adjust the focal length so that the captured image can be transmitted most clearly on the computer screen;

[0137] ① Set the reference line: Move the mouse, take four first marking points 23a on the side edge of the sheave 2 in the image, generate a first straight line, and set it as the reference line (X-axis line) of the entire graph;

[0138] ② Take two second marking points 23b on the end face of the sheave 2 in the image and generate a second straight line;

[0139] ③ Straight line intersection point command, select the first straight line in step ① and the second straight line in step ② to automatically find the first intersection point 23c;

[0140] ④ On the left side edge of the first groove in the image, take two third marking points 23d and generate a third straight line;

[0141] ⑤ Straight line intersection point command, select the first straight line in step ① and the third straight line in step ④ to automatically find the second intersection point 23e;

[0142] ⑥ Point distance command, select the first intersection point 23c and the second intersection point 23e, and calculate the length between the two points, that is, the first spacing A;

[0143] (2) Groove size measurement: Drive the X-axis motor 123 and Y-axis motor 121 through the control switch to move the continuous zoom objective lens 131 above the positions of the second measurement areas I, J, K (measure separately at multiple positions according to the following steps), and then drive the Z-axis motor through the control switch to adjust the focal length so that the captured image can be transmitted most clearly on the computer screen;

[0144] ⑦ On the right side edge of the first groove 22 in the image, take two fifth marking points 23f and generate a fifth straight line;

[0145] ⑧ Two-line included angle calculation command, select the third straight line in step ④ and the fifth straight line in step ⑦ to calculate the included angle B, generally with an error within 0.05°; The main reason for the angle deviation is the wear of the grooving tool or the incorrect selection of the tool angle;

[0146] ⑨ Enlarge the image magnification, evenly select four sixth marking points 23g at the bottom R-type and the lower arc position of the groove in the image, calculate the R radius value E, the main reason for the deviation is the wear of the grooving tool, generally with an error within 0.05mm, automatically generate an analog circle 23h and generate the center 23i;

[0147] ⑩ Repeat step ⑨, measure the R-shaped arc at the bottom of the next groove, calculate the R radius value E, and generate the center of the circle;

[0148] For the center distance command, select the two circles in steps ⑨ and ⑩, and calculate the distance from the center of one circle to the center of the other circle, which is the groove pitch C; the main reason for the groove pitch error is mainly program selection or setting errors;

[0149] Select one of the circles in step ⑨ or ⑩, mark the quadrant point (the bottom of the arc at the bottom of the groove), select the straight line in step ①, and calculate the perpendicular distance from the quadrant point to the straight line, which is the groove depth D. The main reason for the error is mainly program selection or setting errors.

[0150] 4. Visual inspection: In addition to the above measured dimensions, visually judge according to the image. If the shapes of the left and right straight lines of the groove in the image are skewed or unbalanced, the main reasons are that the turning tool is worn or damaged, and the cutting edge is dull and needs to be sharpened.

[0151] The above is the preferred embodiment of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the principle of the present invention, several improvements and refinements can be made, and these improvements and refinements are also regarded as the protection scope of the present invention.

Claims

1. A detection method for a multi-wire cutting sheave, characterized in that, The method includes: Moving the Geneva wheel to a preset shooting area according to a first preset trajectory; Obtaining a real-time image of the Geneva wheel within the shooting area; Selecting a target measurement area on the real-time image; Moving the Geneva wheel according to a second preset trajectory so that the target measurement area is at the shooting point; Obtaining displacement data when the Geneva wheel moves; Associating the size information of the measurement area according to the displacement data; Performing mapping analysis on the image of the measurement area according to the size information to detect the size of the measurement area; The step of performing mapping analysis on the image of the measurement area according to the size information includes: selecting a plurality of marking points in the image of the measurement area; generating a straight line through the plurality of marking points, selecting two intersecting straight lines to obtain an intersection point, calculating the distance between the two intersection points after obtaining the two intersection points; and / or, selecting two straight lines to calculate the included angle between the two straight lines; or, generating a circle through a plurality of marking points, selecting the circle to calculate its radius value and generate a center of the circle, and calculating the distance between two adjacent centers of the circle.

2. The detection method for a multi-wire cutting sheave according to claim 1, characterized in that, There are two measurement areas, and the two measurement areas are the two end parts of the side surface of the Geneva wheel. The step of performing mapping analysis on the image of the measurement area according to the size information includes: Selecting at least two first marking points on the side edge of the Geneva wheel and generating a first straight line through the at least two first marking points; Selecting at least two second marking points on the end face of the Geneva wheel and generating a second straight line through the at least two second marking points; Selecting the first straight line and the second straight line to obtain a first intersection point; Selecting at least two third marking points on the side of the groove on the Geneva wheel, selecting the first groove close to the end face of the Geneva wheel, and selecting the side of the groove closest to the end face of the Geneva wheel, and generating a third straight line through the at least two third marking points; Selecting the first straight line and the third straight line to obtain a second intersection point; Measuring the distance between the first intersection point and the second intersection point after selecting the first intersection point and the second intersection point to obtain a first distance; Comparing the first distances measured in the two measurement areas.

3. The detection method for a multi-wire cutting sheave according to claim 1, characterized in that, The measurement area is the groove on the Geneva wheel. The step of performing mapping analysis on the image of the measurement area according to the size information includes: Selecting at least two fourth marking points on one side of the groove and generating a fourth straight line through the at least two fourth marking points; Selecting at least two fifth marking points on the other side of the groove and generating a fifth straight line through the at least two fifth marking points; Selecting the fourth straight line and the fifth straight line to calculate the included angle between the fourth straight line and the fifth straight line.

4. The detection method for a multi-wire cutting sheave according to claim 1, characterized in that, The measurement area is the groove on the Geneva wheel. The step of performing mapping analysis on the image of the measurement area according to the size information includes: Selecting a plurality of sixth marking points at the bottom arc position of the groove, generating a first circle through the plurality of sixth marking points, selecting the first circle to calculate its radius value and generating a first center of the circle; Select a number of seventh marking points on the bottom arc of another adjacent groove, generate a second circle through the number of seventh marking points, select the second circle, calculate its radius value and generate a second center of the circle; Calculate the distance between the first center of the circle and the second center of the circle to obtain a second spacing.

5. The detection method for a multi-wire cutting sheave according to claim 1, characterized in that, The measurement area is the groove on the grooved pulley. The step of mapping and analyzing in the image of the measurement area according to the dimension information includes: Select a number of eighth marking points at the bottom arc position of the groove, generate a third circle through the number of eighth marking points, and select the quadrant points at the bottom end of the third circle; Select at least two ninth marking points on the side edge of the grooved pulley, and generate a sixth straight line through the at least two ninth marking points; Calculate the distance between the quadrant points and the sixth straight line to obtain a third spacing.

6. A detection controller for a multi-wire cutting sheave, characterized in that, Includes: A first moving module for moving the grooved pulley to a preset shooting area according to a first preset trajectory; A shooting module for acquiring a real-time image of the grooved pulley in the shooting area; A selection module for selecting a target measurement area on the real-time image; A second moving module for moving the grooved pulley according to a second preset trajectory so that the target measurement area is at the shooting point; A displacement data module for acquiring displacement data when the grooved pulley moves; An association module for associating the dimension information of the measurement area according to the displacement data; And A mapping module for performing mapping and analysis in the image of the measurement area according to the dimension information; The mapping module includes: a marking point unit for selecting a number of marking points in the image of the measurement area; A first calculation unit for generating a straight line through a number of marking points, selecting two intersecting straight lines to obtain an intersection point, calculating the distance between the two intersection points after obtaining the two intersection points; and / or, selecting two straight lines to calculate the included angle between the two straight lines; a second calculation unit for generating a circle through a number of marking points, selecting the circle to calculate its radius value and generate a center of the circle, and calculating the distance between two adjacent centers of the circle.

7. A detection device for a multi-wire cutting sheave, characterized in that, Includes: A base; A displacement mechanism provided on the base; A displacement detection mechanism provided on the displacement mechanism to acquire displacement data of the displacement mechanism; Two bearing blocks, the two bearing blocks are slidably arranged on the displacement mechanism, and both ends of the grooved pulley are positioned on the two bearing blocks respectively; An imaging mechanism provided above the displacement mechanism; An operation host having a display screen; and The controller according to claim 6, wherein the display screen, the imaging mechanism, the displacement mechanism and the displacement detection mechanism are all connected to the controller.

8. The detection device for a multi-wire cutting sheave according to claim 7, characterized in that, The two bearing blocks are provided with bearing grooves, a central shaft penetrates through the central hole of the grooved pulley, and both ends of the central shaft are respectively carried in the two bearing grooves; And / or, the imaging mechanism includes a continuously variable zoom objective lens and a CCD color imaging lens built in the continuously variable zoom objective lens; And / or, the displacement mechanism includes an X-axis displacement module, a moving workbench, and a Y-axis displacement module. The X-axis displacement module is arranged on the base; the moving workbench is slidably arranged on the base, and the X-axis displacement module drives the moving workbench to slide along the X-axis; the Y-axis displacement module is arranged on the moving workbench, and two of the bearing blocks are slidably arranged on the moving workbench, and the Y-axis displacement module drives the two bearing blocks to slide along the Y-axis; And / or, the displacement detection mechanism includes an X-axis grating scale and a Y-axis grating scale, and the X-axis grating scale and the Y-axis grating scale respectively obtain the X-axis displacement data and the Y-axis displacement data of the displacement mechanism.

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