Automatic measuring device and measuring method for capsule size

Abstract

The present invention discloses an automatic measuring device and a measuring method for the size of a bladder skin, which relates to the field of measuring length, thickness or similar linear dimensions. The automatic measuring device mainly includes a turntable, a jig, a thickness measuring mechanism, a height measuring mechanism and a diameter measuring mechanism. The jig is used to open the bladder skin into a regular truncated cone shape, and the upper and lower ends of the bladder skin are exposed, so that each measuring mechanism can measure the upper and lower ends of the bladder skin at the same time, which is efficient and can avoid measurement errors caused by loading and unloading the bladder skin back and forth. In addition, the two cameras of the thickness measuring mechanism are rotatably arranged at the upper and lower parts of the jig through an electric rotating table, and the upper and lower ends of the bladder skin are photographed at multiple points through the rotation of the two cameras, and multiple thickness values ​​of the upper and lower ends of the bladder skin are calculated, which has the advantages of high automation, accurate measurement, and complete size measurement functions.

Description

Technical Field

[0001] The invention relates to the field of measuring length, thickness or similar linear dimensions, and in particular to an automatic measuring device and a measuring method for the size of a capsule. Background Art

[0002] Air suspension is a technology used in automobile suspension systems. It uses air springs as elastic elements and compressed air to adjust the height and hardness of the vehicle, thereby improving ride comfort and vehicle handling. The air suspension system includes air springs, shock absorbers, guide mechanisms, and a vehicle height control system. The bladder (i.e., airbag) is the core part of the air spring. It is a rubber airbag filled with compressed air. The height of the vehicle body and the stiffness of the suspension system are adjusted by controlling the amount of inflation. Detecting whether the thickness, height and other dimensions of the bladder and the deviation of the dimensions meet the production requirements is one of the important issues to ensure the quality of the bladder. At present, there is no device that can fully automatically measure the bladder size. Therefore, there is an urgent need for an automated device that can quickly and accurately measure the main dimensions of the bladder. Summary of the invention

[0003] The purpose of the present invention is to provide an automatic measuring device and a measuring method for the size of a capsule skin, and the purpose is to overcome the above-mentioned problems existing in the prior art.

[0004] To achieve the above object, the present invention provides the following technical solutions:

[0005] An automatic measuring device for the size of a bladder skin, comprising a frame, the frame being rotatably provided with a turntable, the turntable being provided with a plurality of jigs for fixing and placing the bladder skin in a circular arrangement, the frame being provided with a loading station, at least one size measuring station and a discharging station in a circular arrangement around the turntable;

[0006] The fixture comprises an upper plate, a connecting rod, a lower plate and a light-transmitting plate; the turntable is provided with a hollow portion, the light-transmitting plate is fixedly covered on the hollow portion, the lower plate is fixedly arranged on the light-transmitting plate, and the upper plate is fixedly arranged above the lower plate through the connecting rod; the lower end of the capsule skin is nested in the lower plate and abuts against the light-transmitting plate, and the upper end of the capsule skin is nested in the upper plate;

[0007] One of the above-mentioned dimension measurement stations is equipped with a thickness measuring mechanism, which includes a first electric rotating table, a first camera, a second electric rotating table and a second camera. The above-mentioned frame is rotatably provided with the above-mentioned first camera around the upper disk body above the upper disk body through the first electric rotating table, and the above-mentioned frame is rotatably provided with the above-mentioned second camera around the lower disk body below the light-transmitting plate through the second electric rotating table.

[0008] Furthermore, one of the above-mentioned dimension measurement stations is equipped with a height measuring mechanism, which includes a three-dimensional line scan camera and a first electric slide module. The above-mentioned turntable is movably provided with the above-mentioned three-dimensional line scan camera above the fixture through the first electric slide module.

[0009] Furthermore, one of the above-mentioned dimension measurement stations is equipped with a diameter measuring mechanism, and the above-mentioned diameter measuring mechanism includes a third camera and a fourth camera. The above-mentioned frame is provided with a third camera above the upper disk body, and a fourth camera is provided below the light-transmitting plate.

[0010] Furthermore, the unloading station is equipped with a multi-axis manipulator and a cleaning nozzle. The multi-axis manipulator is used to remove the capsule skin from the fixture of the unloading station, and the cleaning nozzle is directed toward the fixture of the unloading station.

[0011] Furthermore, the above-mentioned turntable is provided with a positioning groove, the above-mentioned hollow portion is opened in the middle of the bottom of the positioning groove, and the above-mentioned light-transmitting plate is fixedly embedded in the positioning groove; the above-mentioned fixture also includes a light-shielding ring, which is fixedly connected to the turntable and covers the edge of the light-transmitting plate, and the light-transmitting plate exposed between the light-shielding ring and the lower disk body forms a light-transmitting area for photographing the capsule skin from bottom to top.

[0012] Furthermore, a concave portion and a positioning hole are provided at the lower end of the lower plate; the fixture further comprises an upper connecting seat and a lower connecting seat, a latch is fixedly provided at the upper end of the upper connecting seat, and a positioning boss is provided at the lower end; the upper connecting seat is fixedly connected to the lower connecting seat, and the positioning boss is embedded in the light-transmitting plate, so that the light-transmitting plate is fixedly clamped between the upper connecting seat and the lower connecting seat;

[0013] The lower plate body is nested in the upper connecting seat, and the positioning hole is nested in the latch pin.

[0014] Furthermore, the above-mentioned connecting rod includes an upper section rod and a lower section rod, and the above-mentioned upper disk body is fixedly arranged at the upper end of the upper section rod; the lower end of the upper section rod can be telescopically inserted into the upper end of the lower section rod, and is equipped with a first fastener; a connecting disk is provided in the middle part of the lower section rod, and the connecting disk is fixedly connected to the lower disk body; the lower end of the lower section rod is passed through the upper connecting seat and the lower connecting seat, and is locked to the lower connecting seat by the second fastener.

[0015] Furthermore, the thickness measuring mechanism also includes a third electric slide module and a fourth electric slide module. The first camera can be horizontally movably arranged on the rotating table of the first electric rotating table through the third electric slide module; the second camera can be horizontally movably arranged on the rotating table of the second electric rotating table through the fourth electric slide module.

[0016] A method for measuring the size of a capsule skin, using an automatic measuring device as described above to implement the measuring method, comprising the following steps:

[0017] Loading: Turn the turntable to move the jig without the capsule skin to the loading station; fix the capsule skin on the jig at the loading station, so that the lower end of the capsule skin is nested in the lower plate and abuts against the light-transmitting plate, and the upper end of the capsule skin is nested in the upper plate;

[0018] Measuring thickness: Turn the turntable to move the jig carrying the capsule skin to the dimension measuring station equipped with a thickness measuring mechanism;

[0019] Rotate the first electric rotating table to move the first camera to the top of one of the upper end measurement points, and obtain the upper end partial image of the capsule skin at the upper end measurement point and its periphery; perform image processing on the upper end partial image to calculate the upper end thickness value of the capsule skin at the upper end measurement point; rotate the first electric rotating table to move the first camera to the top of another upper end measurement point, and obtain another upper end partial image to calculate the upper end thickness value of the capsule skin at another upper end measurement point; repeat this process multiple times to calculate the upper end thickness values ​​of the capsule skin at multiple upper end measurement points;

[0020] Rotate the second electric rotating table to move the second camera to the bottom of one of the lower end measurement points, and obtain a lower end partial image of the capsule skin at the lower end measurement point and its surroundings; perform image processing on the lower end partial image to calculate the lower end thickness value of the capsule skin at the lower end measurement point; rotate the second electric rotating table to move the second camera to the bottom of another lower end measurement point, and obtain another lower end partial image to calculate the lower end thickness value of the capsule skin at another lower end measurement point; repeat this process multiple times to calculate the lower end thickness values ​​of the capsule skin at multiple lower end measurement points;

[0021] Unloading: Turn the turntable to move the jig carrying the capsule skin to the unloading station; remove the capsule skin from the jig.

[0022] Further, before unloading, the following steps are also included:

[0023] Measuring height: rotating the turntable to move the jig carrying the capsule skin to the dimension measurement station equipped with a height measurement mechanism; moving the 3D line scan camera through the first electric slide module, and performing a 3D scan of the capsule skin by the 3D line scan camera; calculating the height value of the capsule skin based on the 3D scanning information;

[0024] Measuring the diameter: rotating the turntable to move the jig carrying the capsule skin to the dimension measuring station equipped with a diameter measuring mechanism; the third camera captures and obtains a complete image of the upper end of the capsule skin; the upper end complete image is processed to calculate the upper end outer diameter value of the capsule skin; the fourth camera captures and obtains a complete image of the lower end of the capsule skin; the lower end complete image is processed to calculate the lower end outer diameter value of the capsule skin.

[0025] Compared with the prior art, the present invention has the following beneficial effects:

[0026] First, the automatic metering device disclosed in the present invention is used for measuring the size of the bladder skin, and mainly includes a turntable, a fixture and a thickness measuring mechanism. The bladder skin is stretched into a regular truncated cone shape by the fixture, and the upper and lower ends of the bladder skin are exposed, which is convenient for the size measurement station to measure the upper and lower ends of the bladder skin at the same time, which is efficient and can avoid measurement errors caused by loading and unloading the bladder skin. In addition, the two cameras of the thickness measuring mechanism are rotatably arranged at the upper and lower sides of the fixture through an electric rotating table. The upper and lower ends of the bladder skin are photographed at multiple points through the rotation of the two cameras, and multiple thickness values ​​of the upper and lower ends of the bladder skin are calculated, which has the advantages of high automation, multiple measurement points, and accurate measurement.

[0027] Secondly, the automatic metering device disclosed in the present invention also includes a height measuring mechanism and a diameter measuring mechanism, which can measure the size of the capsule skin from multiple dimensions and has the advantages of full functions and a high degree of automation.

[0028] Thirdly, in the present invention, the fixture includes an upper plate body, an upper section rod, a lower section rod, a lower plate body, an upper connecting seat, a light-transmitting plate, a lower connecting seat and a light-shielding plate, etc., which can be used to measure bladder skins of different sizes, and the coordination and installation of the various accessories are reliable and easy to replace.

[0029] Fourthly, the present invention also includes a method for measuring the size of the capsule skin based on the above-mentioned automatic measuring device. With the help of a jig and various measuring mechanisms, the measurement of various capsule skin sizes can be completed automatically, efficiently and accurately, which greatly facilitates the quality inspection of the capsule skin by manufacturers. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a schematic diagram of the structure of the automatic measuring device for the capsule skin size in the present invention.

[0031] Figure 2 It is a partial structural schematic diagram of the automatic measuring device for the capsule skin size in the present invention.

[0032] Figure 3 It is a schematic diagram of the structure of the capsule skin, the fixture and the turntable in the present invention.

[0033] Figure 4 This is an exploded view of the fixture and the turntable in the present invention.

[0034] Figure 5 This is a partial structural schematic diagram of the automatic measuring device for the size of the capsule skin in the present invention, wherein the mechanical structure located above the rotating disk is not shown.

[0035] Figure 6 for Figure 5 A partial enlarged schematic diagram of part A.

[0036] Figure 7 for Figure 5A schematic diagram of a partial enlargement of part A from another viewing angle. DETAILED DESCRIPTION

[0037] The specific implementation of the present invention is described below with reference to the accompanying drawings. In order to fully understand the present invention, many details are described below, but for those skilled in the art, the present invention can be implemented without these details.

[0038] like Figure 1 , Figure 2 , Figure 5 and Figure 6 As shown, an automatic measuring device for capsule skin size comprises a frame 6, on which a turntable 7 is horizontally rotatably provided, and a servo motor 70 is provided for indirectly rotating the turntable 7.

[0039] like Figure 1 and Figure 2 As shown, the turntable 7 is provided with five fixtures 8 for fixing the capsule skin a in a circular distribution, and the frame 6 is provided with a loading station 1, three size measuring stations and a unloading station 5 in a circular distribution around the turntable 7.

[0040] Among them, the three dimension measurement stations include but are not limited to being equipped with a height measuring mechanism 2, a thickness measuring mechanism 3 and a diameter measuring mechanism 4. Preferably, the height measuring mechanism 2, the thickness measuring mechanism 3 and the diameter measuring mechanism 4 are arranged in a circular distribution in sequence, and the arrangement order can also be changed as needed. Of course, the number of dimension measurement stations is not limited to three, and can be increased or decreased according to the measurement content, such as one, two, four, or even more. Correspondingly, the number of jigs 8 will also increase or decrease with the increase or decrease in the number of dimension measurement stations, and is not limited to five.

[0041] like Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, the fixture 8 includes an upper plate 80, a connecting rod, a lower plate 85 and a light-transmitting plate 88. The turntable 7 is provided with a hollow portion 72, the light-transmitting plate 88 is fixedly covered on the hollow portion 72, the lower plate 85 is fixedly arranged on the light-transmitting plate 88, and the upper plate 80 is fixedly arranged above the lower plate 85 through the connecting rod. When in use, the lower end of the capsule skin a is nested in the lower plate 85 and abuts against the light-transmitting plate 88, and the upper end of the capsule skin a is nested in the upper plate 80, so that the capsule skin a is expanded into a regular truncated cone shape, which is convenient for measuring its size.

[0042] Preferably, the upper plate body 80 is provided with a clearance groove 801, which is convenient for pinching the upper end of the capsule skin a and removing the capsule skin a from the fixture 8 to complete unloading.

[0043] like Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, specifically, the fixture 8 also includes a light shielding ring 83. The turntable 7 is provided with a positioning groove 71, and a hollow portion 72 is provided in the middle of the bottom of the positioning groove 71. During assembly, the light-transmitting plate 88 is fixedly embedded in the positioning groove 71 in an interference fit manner, and the light shielding ring 83 is fixedly connected to the turntable 7 and covers the edge of the light-transmitting plate 88, so that the light-transmitting plate 88 is fixedly installed on the turntable 7. The light-transmitting plate 88 exposed between the light shielding ring 83 and the lower plate body 85 forms a light-transmitting area for photographing the capsule skin a from bottom to top.

[0044] Preferably, the light-transmitting plate 88 includes but is not limited to tempered glass products, and the light-shielding ring 83 includes but is not limited to steel alloy products. The light-shielding ring 83 is detachably fixed to the turntable 7 by means of screws, etc., so as to facilitate the replacement of the light-transmitting plate 88.

[0045] The light shielding ring 83 is used for fixing and installing the light-transmitting plate 88 and for shading. Specifically, it can prevent light leakage from the edge of the light-transmitting plate 88. At the same time, the light-transmitting plate 88 can cooperate with the lower plate 85 to well set the size of the light-transmitting area (the inner diameter of the light-transmitting area is the outer diameter of the lower plate 85, and the inner diameter of the light-transmitting area is the inner diameter of the light shielding ring 83.). If the inner diameter of the light shielding ring 83 is too small, it is easy to block the capsule skin a, so that the lower end of the capsule skin a cannot be nested in the lower plate 85 and abuts against the light-transmitting plate 88; if the inner diameter of the light shielding ring 83 is too large, it is easy for external light to pass through the light-transmitting plate 88 to form backlight, affecting the image shooting quality of the size measurement station, and then affecting the size measurement. At present, the thickness of the capsule skin is generally 4.3mm-4.5mm. As a preference, the width of the light-transmitting area (i.e., the difference between its inner and outer diameters) ranges from 8.6mm to 45mm.

[0046] like Figure 1 , Figure 2 , Figure 5 and Figure 6 As shown, in order to facilitate the adaptation of the capsule skin a of different heights, the connecting rod should have a telescopic adjustment function. Specifically, the connecting rod includes an upper section rod 81, a lower section rod 84 and a first fastener 82. The upper plate body 80 is fixed to the upper end of the upper section rod 81, the lower plate body 85 is fixed to the lower end of the lower section rod 84, the lower end of the upper section rod 81 can be telescopically plugged into the upper end of the lower section rod 84, and is equipped with a first fastener 82 for locking the two.

[0047] like Figure 1 , Figure 2 , Figure 5 and Figure 6 As shown, in order to facilitate the adaptation of the capsule skin a with different upper and lower end diameters, the upper end of the upper section rod 81 is inserted into the lower end of the upper plate body 80, and the two are detachably fixedly connected together by screws. A connecting plate 841 is provided in the middle of the lower section rod 84, and the lower plate body 85 is detachably fixedly connected to the connecting plate 841 by screws.

[0048] like Figure 1 , Figure 2 , Figure 5 and Figure 6 As shown, in order to facilitate the loading and unloading of the lower section rod 84 and the replacement of the lower plate 85, the lower section rod 84 is detachably fixedly connected to the light-transmitting plate 88. Specifically, the fixture 8 also includes an upper connecting seat 86 and a lower connecting seat 89. A positioning boss 862 is provided at the lower end of the upper connecting seat 86, and the upper connecting seat 86 is fixedly connected to the lower connecting seat 89, and the positioning boss 862 is embedded in the light-transmitting plate 88, so that the light-transmitting plate 88 is fixedly clamped between the upper connecting seat 86 and the lower connecting seat 89. In other words, the upper connecting seat 86 and the lower connecting seat 89 are detachably fixedly arranged on the upper and lower end surfaces of the light-transmitting plate 88.

[0049] Preferably, the upper connecting seat 86 and the lower connecting seat 89 are detachably fixed together by screws. Elastic washers 87 are provided between the light-transmitting plate 88 and the upper connecting seat 86 and the lower connecting seat 89 to prevent the light-transmitting plate 88 from being crushed when the screws are tightened on the upper connecting seat 86 and the lower connecting seat 89.

[0050] like Figure 1 , Figure 2 , Figure 5 and Figure 6 As shown, the lower end of the lower plate 85 is provided with a recess 852 and a positioning hole 851; the upper end of the upper connecting seat 86 is fixedly provided with a latch 861; and the lower connecting seat 89 is equipped with a second fastener 891. After the lower plate 85 is fixedly connected to the connecting plate 841, the lower end of the lower section rod 84 is passed through the upper connecting seat 86 and the lower connecting seat 89, so that the lower plate 85 is nested in the upper connecting seat 86, and the positioning hole 851 is nested in the latch 861, and then the lower end of the lower section rod 84 is locked to the lower connecting seat 89 by the second fastener 891. At this point, the lower plate 85 and the lower section rod 84 are detachably fixedly connected to the upper connecting seat 86 and the lower connecting seat 89.

[0051] Preferably, the lower end side wall of the lower section rod 84 is provided with a limiting groove 842 that cooperates with the second fastener 891, and the free end of the second fastener 891 is clamped in the limiting groove 842, thereby locking the lower end of the lower section rod 84 to the lower connecting seat 89.

[0052] like Figure 1 , Figure 2 , Figure 5 and Figure 6 As shown, when in use, the turntable 7 is driven by the servo motor 70 to rotate indirectly, so that the fixture 8 circulates between the various workstations to achieve the connection between the various processes. The specific structure of each workstation is described in detail below according to the connection order of the process.

[0053] like Figure 1 and Figure 2As shown, in order to improve safety, the loading station 1 is equipped with a grating sensor module 11. If the grating sensor module 11 is triggered due to shielding, the automatic metering device automatically pauses to prevent staff from being injured.

[0054] like Figure 1 , Figure 2 and Figure 3 As shown, one of the dimension measurement stations is equipped with a height measuring mechanism 2 for measuring the height of the capsule skin a. Specifically, the height measuring mechanism 2 includes a three-dimensional line scanning camera 22 and a first electric slide module 21, and the three-dimensional line scanning camera 22 is movably arranged on the turntable 7 above the fixture 8 through the first electric slide module 21. Preferably, the first electric slide module 21 is a two-dimensional electric slide module, so that the three-dimensional line scanning camera 22 can be moved left and right and can be moved up and down on the turntable 7.

[0055] like Figure 1 , Figure 2 , Figure 3 , Figure 5 , Figure 6 and Figure 7 As shown, one of the dimension measurement stations is equipped with a thickness measuring mechanism 3 for measuring the thickness of the upper and lower ends of the capsule skin a. Specifically, the thickness measuring mechanism 3 includes a first electric rotating table 32, a first camera 34, a second electric rotating table 36 and a second camera 38. Among them, the frame 6 is rotatably provided with the first camera 34 above the upper disk 80 and around the upper disk 80 through the first electric rotating table 32. The frame 6 is rotatably provided with the second camera 38 around the lower disk 85 below the light-transmitting plate 88 through the second electric rotating table 36.

[0056] In order to allow the first camera 34 to always capture the upper end of the capsule skin a during the rotation process, the rotation axis of the first electric rotating platform 32 should be made to coincide with the axis of the upper plate 80 as much as possible. Similarly, the rotation axis of the second electric rotating platform 36 should be made to coincide with the axis of the lower plate 85 as much as possible. In addition, in this embodiment, the axis of the upper plate 80 and the axis of the lower plate 85 should coincide with each other as much as possible.

[0057] Preferably, the first camera 34 is horizontally movably arranged on the rotating table of the first electric rotating table 32 through the third electric sliding table module 33. Specifically, the frame 6 is vertically extended with a fifth electric sliding table module 31, the sliding table of the fifth electric sliding table module 31 is fixedly installed with a first mounting seat 311, and the first electric rotating table 32 is fixedly installed on the first mounting seat 311. The rotating table of the first electric rotating table 32 is fixedly installed with a second mounting seat 321, and the second mounting seat 321 is horizontally extended with a third electric sliding table module 33, and the sliding table of the third electric sliding table module 33 is fixedly installed with a third mounting seat 331, and the third mounting seat 331 is fixedly installed with the first camera 34, and the first fill light 35 is fixedly installed.

[0058] Preferably, the second camera 38 is horizontally movably arranged on the rotating table of the second electric rotating table 36 through the fourth electric slide module 37, so as to adjust the distance from the second camera 38 to the rotation axis centerline of the first electric rotating table 32, that is, adjust the radius of the rotation trajectory of the second camera 38, and try to make the vertical projection of the rotation trajectory of the second camera 38 located within the upper end contour of the capsule skin a. Specifically, the frame 6 is fixedly installed with the second electric rotating table 36 below the light-transmitting plate 88, the rotating table of the second electric rotating table 36 is fixedly installed with a fourth mounting seat 361, the fourth mounting seat 361 is horizontally extended with a fourth electric slide module 37, the slide of the fourth electric slide module 37 is fixedly installed with a fifth mounting seat 371, the fifth mounting seat 371 is fixedly installed with the second camera 38, and the second camera 38 is fixedly installed with a second fill light 39.

[0059] like Figure 1 , Figure 2 , Figure 3 , Figure 5 , Figure 6 and Figure 7 As shown, one of the dimension measuring stations is equipped with a diameter measuring mechanism 4 for measuring the outer diameters of the upper and lower ends of the capsule skin a. Specifically, the diameter measuring mechanism 4 includes a third camera 42 and a fourth camera 46. The frame 6 is provided with the third camera 42 above the upper plate 80, and the fourth camera 46 below the light-transmitting plate 88.

[0060] Preferably, the third camera 42 is movably arranged on the frame 6 through the sixth electric slide module 41. Specifically, the frame 6 is vertically extended with the sixth electric slide module 41, the slide of the sixth electric slide module 41 is fixedly installed with a sixth mounting seat 411, the sixth mounting seat 411 is fixedly installed with the third camera 42, and the third fill light 43 is fixedly installed for the third camera 42.

[0061] Preferably, the frame 6 is fixedly provided with a mounting frame 45 below the jig 8, and the middle part of the mounting frame 45 has a hollow area 451, so that the fourth camera 46 can shoot the jig 8 and the bag skin a from bottom to top; the fourth camera 46 is fixedly installed below the mounting frame 45, and the upper end surface of the mounting frame 45 is a fourth camera 46 equipped with a fourth fill light 44, and the fourth fill light 44 is a long strip-shaped lamp.

[0062] like Figure 1 , Figure 2 and Figure 3 As shown, the unloading station 5 is equipped with a multi-axis manipulator 51 and a cleaning nozzle 52. The multi-axis manipulator 51 is used to remove the capsule skin a from the fixture 8. The multi-axis manipulator 51 grabs the capsule skin a at the clearance groove 801 of the upper plate body 80 to achieve automatic unloading. The cleaning nozzle 52 is fixedly installed on the machine base 6, and the cleaning nozzle 52 faces the fixture 8 of the unloading station 5, and is used to remove debris that may exist on the fixture 8.

[0063] It should be noted that each electric rotating table, each electric sliding table module, the multi-axis manipulator 51 and the cleaning nozzle 52 all belong to the prior art, and their specific structures are not described in detail here.

[0064] like Figures 1 to 7 As shown, a method for measuring the size of a capsule skin is implemented using the above-mentioned automatic measuring device. The method comprises the following steps:

[0065] Loading: rotate the turntable 7 to move the jig 8 without the capsule skin a to the loading station; including but not limited to manually fixing the capsule skin a on the jig 8 at the loading station 1, so that the lower end of the capsule skin a is nested in the lower disk body 85 and abuts against the light-transmitting plate 88, and the upper end of the capsule skin a is nested in the upper disk body 80.

[0066] Measuring height: rotating the turntable 7, moving the jig 8 carrying the capsule skin a to the dimension measurement station equipped with the height measurement mechanism 2; moving the three-dimensional line scan camera 22 left and right through the first electric slide module 21, and performing a three-dimensional scan of the capsule skin a by the three-dimensional line scan camera 22; calculating the height value of the capsule skin a according to the three-dimensional scanning information;

[0067] Measuring thickness: rotating the turntable 7, moving the jig 8 carrying the capsule skin a to the dimension measuring station equipped with the thickness measuring mechanism 3;

[0068] Rotate the first electric rotating table 32, move the first camera 34 to above one of the upper end measurement points, and obtain an upper end partial image of the capsule a at the upper end measurement point and its periphery; perform image processing on the upper end partial image, and calculate the upper end thickness value of the capsule a at the upper end measurement point; rotate the first electric rotating table 32, move the first camera 34 to above another upper end measurement point, and obtain another upper end partial image, and calculate the upper end thickness value of the capsule a at another upper end measurement point; repeat this process multiple times to calculate the upper end thickness values ​​of the capsule a at multiple upper end measurement points; preferably, the angle of each rotation of the first electric rotating table 32 is greater than the field of view angle of the first camera 34, so that there is no overlapping area between two adjacent upper end partial images.

[0069] Rotate the second electric rotating table 36, move the second camera 38 to the bottom of one of the lower end measurement points, and obtain a lower end local image of the capsule skin a at the lower end measurement point and its surroundings; perform image processing on the lower end local image, and calculate the lower end thickness value of the capsule skin a at the lower end measurement point; rotate the second electric rotating table 36, move the second camera 38 to the bottom of another lower end measurement point, and obtain another lower end local image, and calculate the lower end thickness value of the capsule skin a at another lower end measurement point; repeat this multiple times to calculate the lower end thickness values ​​of the capsule skin a at multiple lower end measurement points.

[0070] Measuring the diameter: rotating the turntable 7, moving the jig 8 carrying the capsule a to the dimension measuring station equipped with the diameter measuring mechanism 4; the third camera 42 captures and obtains the complete image of the upper end of the capsule a; the upper end complete image is processed to calculate the upper end outer diameter value of the capsule a; the fourth camera 46 captures and obtains the lower end complete image of the capsule a; the lower end complete image is processed to calculate the lower end outer diameter value of the capsule a.

[0071] Unloading: Turn the turntable 7 to move the jig 8 carrying the capsule skin a to the unloading station; remove the capsule skin a from the jig 8.

[0072] In a specific embodiment, during the thickness measurement process, the upper end local image is processed to calculate the upper end thickness value of the capsule skin a at the upper end measurement point, specifically: using edge detection-based or contour detection-based image processing technology, the upper end local outer contour and the upper end local inner contour of the capsule skin a are identified and located from the upper end local image, and the outer radius of the upper end local outer contour and the inner radius of the upper end local inner contour are calculated, and the difference between the outer radius and the inner radius is calculated, that is, the upper end thickness value of the capsule skin a at the upper end measurement point is obtained. The specific calculation method of the lower end thickness value is the same as that of the lower end thickness value, which will not be repeated here.

[0073] In a specific embodiment, during the diameter measurement process, the third camera 42 captures and obtains a complete image of the upper end of the capsule skin a; the complete image of the upper end is processed to calculate the value of the upper end outer diameter of the capsule skin a, specifically: using an image processing technology based on edge detection or contour detection, the upper end outer contour of the capsule skin a is identified and located from the upper end complete image, and the average diameter of the upper end outer contour is calculated, that is, the value of the upper end outer diameter of the capsule skin a is obtained. The specific calculation method of the lower end outer diameter value is the same as that of the lower end outer diameter value, which will not be repeated here.

[0074] In a specific embodiment, when unloading, the size of the capsule skin a is determined to be qualified according to each measurement value, and the unloaded capsule skin a is sorted. Specifically, before unloading, each measurement value is compared with a preset standard value (usually a value interval). If each measurement value meets the standard value, the size of the capsule skin a is determined to be qualified, and it is removed from the fixture 8 of the unloading station 5 and placed in the qualified area. If a certain measurement value does not meet the standard value, the size of the capsule skin a is determined to be unqualified, and it is removed from the fixture 8 of the unloading station 5 and placed in the unqualified area.

[0075] The above is only a specific implementation of the present invention, but the design concept of the present invention is not limited thereto. Any non-substantial changes to the present invention using this concept shall be deemed as an infringement of the protection scope of the present invention.

Claims

1. An automatic measuring device for the size of a capsule skin, comprising a frame (6), wherein the frame (6) is provided with a turntable (7) which can be rotated horizontally, and wherein: The turntable (7) is provided with a plurality of jigs (8) for fixing and placing the capsule skin (a) in a circular arrangement, and the frame (6) is provided with a loading station (1), at least one size measuring station and a discharging station (5) in a circular arrangement around the turntable (7); The fixture (8) comprises an upper disk body (80), a connecting rod, a lower disk body (85) and a light-transmitting plate (88); the turntable (7) is provided with a hollow portion (72), the light-transmitting plate (88) is fixedly covered on the hollow portion (72), the lower disk body (85) is fixedly arranged on the light-transmitting plate (88), and the upper disk body (80) is fixedly arranged above the lower disk body (85) via the connecting rod; the lower end of the capsule skin (a) is nested in the lower disk body (85) and abuts against the light-transmitting plate (88), and the upper end of the capsule skin (a) is nested in the upper disk body (80); One of the dimension measurement stations is equipped with a thickness measurement mechanism (3), the thickness measurement mechanism (3) comprising a first electric rotating table (32), a first camera (34), a second electric rotating table (36) and a second camera (38), the frame (6) being rotatably provided with the first camera (34) above the upper disk (80) and around the upper disk (80) via the first electric rotating table (32), and the frame (6) being rotatably provided with the second camera (38) below the light-transmitting plate (88) and around the lower disk (85) via the second electric rotating table (36); One of the dimension measurement stations is equipped with a height measurement mechanism (2), the height measurement mechanism (2) comprising a three-dimensional line scan camera (22) and a first electric slide module (21), and the turntable (7) is movably provided with the three-dimensional line scan camera (22) above the fixture (8) via the first electric slide module (21).

2. The automatic measuring device for the size of a capsule as claimed in claim 1, characterized in that: One of the dimension measurement stations is equipped with a diameter measurement mechanism (4), the diameter measurement mechanism (4) comprising a third camera (42) and a fourth camera (46), the frame (6) being provided with the third camera (42) above the upper disk (80) and the fourth camera (46) below the light-transmitting plate (88).

3. The automatic measuring device for the size of a capsule as claimed in claim 1, characterized in that: The unloading station (5) is equipped with a multi-axis manipulator (51) and a cleaning nozzle (52). The multi-axis manipulator (51) is used to remove the capsule skin (a) from the fixture (8) of the unloading station (5). The cleaning nozzle (52) is directed toward the fixture (8) of the unloading station (5).

4. The automatic measuring device for the size of a capsule as claimed in claim 1, characterized in that: The rotating disk (7) is provided with a positioning groove (71), the hollow portion (72) is provided in the middle of the bottom of the positioning groove (71), and the light-transmitting plate (88) is fixedly embedded in the positioning groove (71); the fixture (8) also includes a light-shielding ring (83), the light-shielding ring (83) is fixedly connected to the rotating disk (7) and covers the edge of the light-transmitting plate (88), and the light-transmitting plate (88) exposed between the light-shielding ring (83) and the lower disk body (85) forms a light-transmitting area for photographing the capsule skin (a) from bottom to top.

5. The automatic measuring device for the size of a capsule as claimed in claim 1, characterized in that: The lower end of the lower disk body (85) is provided with a recess (852) and a positioning hole (851); the fixture (8) further comprises an upper connecting seat (86) and a lower connecting seat (89); the upper end of the upper connecting seat (86) is fixedly provided with a latch (861), and the lower end is provided with a positioning boss (862); the upper connecting seat (86) is fixedly connected to the lower connecting seat (89), and the positioning boss (862) is embedded in the light-transmitting plate (88), so that the light-transmitting plate (88) is fixedly clamped between the upper connecting seat (86) and the lower connecting seat (89); the lower disk body (85) is nested in the upper connecting seat (86), and the positioning hole (851) is nested in the latch (861).

6. The automatic measuring device for the size of the capsule as claimed in claim 5, characterized in that: The connecting rod comprises an upper rod section (81) and a lower rod section (84); the upper disk body (80) is fixedly arranged at the upper end of the upper rod section (81); the lower end of the upper rod section (81) is telescopically plugged into the upper end of the lower rod section (84) and is provided with a first fastener (82); a connecting disk (841) is provided at the middle of the lower rod section (84), and the connecting disk (841) is fixedly connected to the lower disk body (85); the lower end of the lower rod section (84) is passed through an upper connecting seat (86) and a lower connecting seat (89), and is locked to the lower connecting seat (89) by a second fastener (891).

7. The automatic measuring device for the size of a capsule as claimed in claim 1, characterized in that: The thickness measuring mechanism (3) further comprises a third electric slide module (33), and the first camera (34) is horizontally movably arranged on the rotating platform of the first electric rotating platform (32) via the third electric slide module (33).

8. A method for measuring the size of a capsule, characterized in that: The method of measuring is implemented by using the automatic measuring device as described in any one of claims 1 to 7, comprising the following steps: Loading: rotating the turntable (7) to move the jig (8) without the capsule skin (a) to the loading station; fixing the capsule skin (a) on the jig (8) at the loading station (1), so that the lower end of the capsule skin (a) is nested in the lower plate body (85) and abuts against the light-transmitting plate (88), and the upper end of the capsule skin (a) is nested in the upper plate body (80); Measuring thickness: rotating the turntable (7) to move the jig (8) carrying the capsule skin (a) to a dimension measuring station equipped with a thickness measuring mechanism (3); Rotating the first electric rotating table (32) to move the first camera (34) above one of the upper end measurement points, and obtaining an upper end partial image of the capsule skin (a) at the upper end measurement point and its periphery; performing image processing on the upper end partial image to calculate the upper end thickness value of the capsule skin (a) at the upper end measurement point; rotating the first electric rotating table (32) to move the first camera (34) above another upper end measurement point, and obtaining another upper end partial image to calculate the upper end thickness value of the capsule skin (a) at another upper end measurement point; repeating this process multiple times to calculate the upper end thickness values ​​of the capsule skin (a) at multiple upper end measurement points; Rotate the second electric rotating table (36) to move the second camera (38) below one of the lower end measurement points, and obtain a lower end partial image of the capsule skin (a) at the lower end measurement point and its surroundings; perform image processing on the lower end partial image to calculate the lower end thickness value of the capsule skin (a) at the lower end measurement point; rotate the second electric rotating table (36) to move the second camera (38) below another lower end measurement point, and obtain another lower end partial image to calculate the lower end thickness value of the capsule skin (a) at another lower end measurement point; repeat this process multiple times to calculate the lower end thickness values ​​of the capsule skin (a) at multiple lower end measurement points; Measuring the height: rotating the turntable (7) to move the jig (8) carrying the capsule skin (a) to a dimension measurement station equipped with a height measurement mechanism (2); moving the three-dimensional line scan camera (22) by means of the first electric slide module (21), so that the three-dimensional line scan camera (22) performs a three-dimensional scan on the capsule skin (a); and calculating the height value of the capsule skin (a) based on the three-dimensional scanning information; Unloading: Turn the turntable (7) to move the jig (8) carrying the bladder skin (a) to the unloading station; remove the bladder skin (a) from the jig (8).

9. A method for measuring the size of a capsule skin as claimed in claim 8, characterized in that: The metering method is implemented using the automatic metering device as described in claim 3, and the following steps are also included before unloading: Measuring the diameter: rotating the turntable (7) to move the jig (8) carrying the capsule skin (a) to a dimension measuring station equipped with a diameter measuring mechanism (4); using a third camera (42) to capture and obtain a complete image of the upper end of the capsule skin (a); performing image processing on the complete image of the upper end to calculate the value of the outer diameter of the upper end of the capsule skin (a); using a fourth camera (46) to capture and obtain a complete image of the lower end of the capsule skin (a); performing image processing on the complete image of the lower end to calculate the value of the outer diameter of the lower end of the capsule skin (a).

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