Ring hole measuring device based on image recognition

Abstract

The utility model relates to the technical field of measuring tools, and provides a ring hole measuring device based on image recognition, which comprises a central control holder and a mechanical control mechanism, the mechanical control mechanism comprises a workpiece storage table, arc-shaped support plates are arranged on two sides of the workpiece storage table, toothed rails are arranged on the arc-shaped support plates, sliding cavities are sleeved on the two arc-shaped support plates, and the toothed rails are arranged on the sliding cavities. A driving gear meshed with the toothed rail is arranged in the sliding cavity; a guide rod and a screw rod are connected between the two sliding cavities; the guide rod and the lead screw penetrate through the image collector and are connected with the image collector in a matched mode. The processing terminal comprises an image processing unit and a feature processing unit, the signal input side of the image processing unit is in communication connection with the signal output side of the camera recognition device, and the data output end of the feature processing unit is in communication connection with the data input end of the image processing unit. The device can be conveniently adjusted to a proper position for acquisition according to a to-be-detected ring hole of a workpiece, so that the verticality of the camera and the to-be-detected circular hole is ensured, and the precision of measured data is higher.

Description

Technical Field

[0001] The utility model relates to the technical field of measuring tools, in particular to a ring hole measuring device based on image recognition. Background Art

[0002] Industrial dimension measurement methods can choose different tools and methods according to specific needs and occasions. For example, calipers, micrometers, microscopes, optical comparators and other tools can be used for measurement.

[0003] During the manufacturing process, it is necessary to measure the annular rings in various parts or components, such as the cylinder bores of automobile engines, bearing holes in mechanical equipment, threaded holes in pipe connectors, etc. The annular ring measurement algorithm can be used to detect indicators such as hole size and roundness in real time to ensure product quality and performance.

[0004] The prior art uses a camera to identify and detect the diameter of a circular hole in a workpiece, but there are the following problems: there are multiple hole positions on the workpiece whose diameters need to be measured, and the circular holes are distributed unevenly and irregularly on the workpiece. The multiple circular holes to be measured are not on the same plane, which makes it difficult to keep the camera and the plane where the circular holes are located perpendicular, the image acquisition may be distorted, and there are errors in the hole shape acquisition, resulting in inaccurate measurement results. Summary of the invention

[0005] The utility model aims to provide a ring hole measuring device based on image recognition, which can conveniently and automatically adjust the position of the ring hole collected by the camera, ensure the high verticality of the plane where the camera and the circular hole are located, and improve the accuracy of the measurement result.

[0006] The embodiment of the utility model is realized by the following technical scheme: a ring hole measuring device based on image recognition, comprising a central control pan-tilt platform and a mechanical control mechanism, the mechanical control mechanism comprising a workpiece storage table, arc-shaped support plates are arranged on both sides of the workpiece storage table, the inner ring side of the arc-shaped support plate is provided with a rack, the two arc-shaped support plates are sleeved with a sliding cavity, and a driving gear meshing with the rack is arranged in the sliding cavity; a guide rod and a screw rod are connected between the two sliding cavities; an image collector, the guide rod and the screw rod pass through the tail of the image collector and are connected thereto, and the image collector moves laterally along the guide rod; a processing terminal, comprising an image processing unit and a feature processing unit, wherein the signal input side of the image processing unit is communicatively connected to the signal output side of the camera identifier, and the data output end of the feature processing unit is communicatively connected to the data input end of the image processing unit.

[0007] Optionally, a guide groove is provided on the outer ring side of the arc-shaped bracket plate, and a roller is rotatably connected in the sliding cavity, and the roller is stuck in the guide groove.

[0008] Optionally, a turntable is provided in the middle of the workpiece storage table, a driving motor is provided at the lower end of the turntable to drive it, and the turntable is arranged between the two arc-shaped bracket plates.

[0009] Optionally, a searchlight for adjusting brightness is installed next to the image collector.

[0010] Optionally, the camera on the image collector is connected using a ball joint.

[0011] Optionally, the arc-shaped support plate adopts a semicircular ring structure.

[0012] Optionally, the arc angle range of the arc-shaped support plate is 150°-180°.

[0013] The technical solution of the embodiment of the utility model has at least the following advantages and beneficial effects: Compared with the prior art, the utility model places the workpiece whose aperture needs to be detected on the workpiece storage table, and installs the image collector on the transverse movement mechanism composed of the lead screw and the guide rod, and cooperates with the arc-shaped bracket plate. The image collector forms a similar covering collection cover, and the image collector can always find a suitable vertical collection point according to the different hole positions on the workpiece, thereby ensuring the correct collection of the image and the accuracy of the aperture size measurement. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the utility model and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying creative work.

[0015] Figure 1 A schematic diagram of the side structure of a ring hole measurement device based on image recognition provided by an embodiment of the utility model;

[0016] Figure 2 It is a front structural schematic diagram of the ring hole measurement device based on image recognition in the utility model;

[0017] Figure 3 for Figure 2 A local enlarged view of point A in FIG.

[0018] Figure 4 It is a top view of the annular hole measuring device based on image recognition in the utility model;

[0019] Figure 5 This is a schematic diagram of the operating principle of the ring hole measurement device based on image recognition.

[0020] Icons: 1-mechanical control mechanism, 11-workpiece placement table, 12-arc bracket plate, 121-guide groove, 13-rack rail, 14-turntable, 15-guide rod, 16-screw rod, 17-drive motor, 2-slide cavity, 3-image collector, 31-searchlight, 4-roller, 5-drive gear. Implementation

[0021] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Generally, the components of the embodiments of the utility model described and shown in the drawings here can be arranged and designed in various different configurations.

[0022] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the present invention to be protected, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0023] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings. Example

[0024] The following is further described in conjunction with specific embodiments. Figure 1-Figure 3As shown, this embodiment is a ring hole measuring device based on image recognition, including a central control pan-tilt and a mechanical control mechanism 1, the mechanical control mechanism 1 includes a workpiece storage table 11, arc-shaped bracket plates 12 are arranged on both sides of the workpiece storage table 11, and a gear rail 13 is arranged on the inner ring side of the arc-shaped bracket plate 12, and the two arc-shaped bracket plates 12 are sleeved with a sliding cavity 2, and a driving gear 5 meshing with the gear rail 13 is arranged in the sliding cavity 2; a guide rod 15 and a screw rod 16 are connected between the two sliding cavities 2; an image collector 3, the guide rod 15 and the screw rod 16 pass through the tail of the image collector 3 and are connected thereto, and the image collector 3 moves laterally along the guide rod 15; a processing terminal includes an image processing unit and a feature processing unit, wherein the signal input side of the image processing unit is connected to the camera The signal output side of the image identifier is communicated with, and the data output end of the feature processing unit is communicated with the data input end of the image processing unit; more specifically, by placing the workpiece to be inspected on the workpiece storage table 11, there may be multiple inspection holes on the workpiece. Therefore, in order to better adjust to the correct hole acquisition position, the image collector 3 is installed on the screw rod 16 and the guide rod 15 to achieve horizontal transverse movement, and the sliding cavity 2 can be guided and moved along the arc-shaped bracket plate 12, so that the movable points of the image collector 3 form a semi-covering cover-shaped structure located above the workpiece. The image collector 3 is adjusted to a suitable position according to the circular hole to be inspected, so that the camera is kept vertical to the circular hole, the data is collected accurately, and the measurement result accuracy is correspondingly higher.

[0025] In addition, it should be noted that the measurement device can also be used in the aerospace field and electronic manufacturing, and is essential for the manufacture of key components such as turbine blades and combustion chamber nozzles of aircraft engines. The ring hole measurement algorithm can be applied to detect parameters such as aperture, wall thickness, shape, etc. in these components to ensure that they meet design requirements and meet high-precision engineering standards. In the manufacture of electronic components, the ring hole measurement algorithm can be used to detect solder holes, socket holes, connector holes, etc. on circuit boards. By accurately measuring the size and position of these holes, the normal function and reliability of electronic equipment can be ensured.

[0026] Refer to 2 and Figure 4 As shown, in order to improve the smooth movement of the image collector 3 driven by the sliding cavity 2 along the arc-shaped bracket plate 12, while also ensuring that the driving gear 5 is tightly pressed against the rack 13, a guide groove 121 is provided on the outer ring side of the smooth arc-shaped bracket plate 12, and a roller 4 is rotatably connected in the sliding cavity 2, and the roller 4 is stuck in the guide groove 121.

[0027] In order to further improve the collection flexibility, a turntable 14 is provided in the middle of the workpiece placement table 11, and a driving motor 17 is provided at the lower end of the turntable 14 for driving. The turntable 14 is arranged between the two arc-shaped support plates 12. The turntable 14 can drive the workpiece to rotate a certain angle for position adjustment, and further cooperate with the image collector 3.

[0028] Reference Figure 2 As shown, a searchlight 31 for adjusting brightness is installed next to the image collector 3 in this embodiment; specifically, changes in lighting conditions may affect the quality of the image and the hole ring detection, and strong lighting or shadows may cause the hole ring part of the image to be lost or deformed, thereby affecting the accuracy of the detection. The searchlight 31 can adjust the brightness of the searchlight 31 according to the brightness of the light at the collection hole, which is helpful for image collection.

[0029] In addition, the camera on the image collector 3 in this embodiment is connected by a ball joint. The application is driven by a small motor and uses a high-precision industrial camera to drive the camera in a small range to adjust the collection angle.

[0030] like Figure 1 As shown, the arc-shaped support plate 12 adopts a semicircular ring structure, and the arc range of the arc-shaped support plate 12 is 150°-180°.

[0031] like Figure 5 As shown, the operation workflow of the whole device is: when the user needs to perform the task of hole ring detection, the central control gimbal can be turned on to remotely control the mechanical control mechanism 1 to control the image collector 3, and the image collector 3 will automatically transfer the data to the image processing unit. At the same time, the user can also input the measurement requirements from the central control gimbal and select the measurement template to be transferred to the image processing unit. The data after image processing will be transmitted to the hole ring feature calculation unit to obtain the final hole ring detection data and store it in the data storage unit, and finally return to the user display interface, and can be saved and changed by the central control gimbal.

[0032] User requirement input: The user inputs the task requirements of the hole ring detection through the central control gimbal interface, including the selection of measurement templates and other related parameters.

[0033] Mechanical control mechanism 1: The central control pan-tilt head remotely operates the mechanical control mechanism 1 to adjust and control the image collector 3 to ensure its proper position and angle to capture the workpiece image. In addition, the mechanical control mechanism 1 can also control the lighting of the workpiece placement table 11 and the angle of the camera to better capture images.

[0034] Data acquisition unit: The high-precision industrial camera automatically transmits the captured image data to the high-precision image processing unit.

[0035] Image processing unit: The high-precision image processing unit processes the received image data, including filtering, denoising and enhancement. At the same time, users can input measurement requirements from the central control gimbal and select measurement templates to be transmitted to the high-precision image processing unit.

[0036] Angle ring feature calculation unit: The data after image processing is transmitted to the hole ring feature calculation unit, which analyzes the hole ring features in the image and calculates the corresponding hole ring detection data.

[0037] Data storage unit: The annular ring detection data is stored in the data storage unit, which can be a local hard disk or a cloud storage device to ensure data preservation and backup.

[0038] Results display: The final annular ring test data is returned to the user interface through the central control gimbal for display, and the user can view the test results and save or modify them.

[0039] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A ring hole measurement device based on image recognition, characterized in that: The invention comprises a central control platform and a mechanical control mechanism (1), wherein the mechanical control mechanism (1) comprises a workpiece storage platform (11), arc-shaped support plates (12) are arranged on both sides of the workpiece storage platform (11), a gear rail (13) is arranged on the inner ring side of the arc-shaped support plate (12), and a sliding cavity (2) is sleeved on the two arc-shaped support plates (12), and a driving gear (5) meshing with the gear rail (13) is arranged in the sliding cavity (2); A guide rod (15) and a screw rod (16) are connected between the two sliding chambers (2); The image collector (3) has the guide rod (15) and the screw rod (16) passing through the rear portion of the image collector (3) and being connected thereto in a coordinated manner, and the image collector (3) moves laterally along the guide rod (15); The processing terminal includes an image processing unit and a feature processing unit, wherein the signal input side of the image processing unit is communicatively connected to the signal output side of the camera identifier, and the data output end of the feature processing unit is communicatively connected to the data input end of the image processing unit.

2. The annular ring measurement device based on image recognition according to claim 1, characterized in that: A guide groove (121) is provided on the outer ring side of the arc-shaped bracket plate (12), and a roller (4) is rotatably connected in the sliding cavity (2), and the roller (4) is inserted into the guide groove (121).

3. The annular ring measurement device based on image recognition according to claim 2, characterized in that: A turntable (14) is provided in the middle of the workpiece storage platform (11), a driving motor (17) is provided at the lower end of the turntable (14) for driving, and the turntable (14) is arranged between the two arc-shaped bracket plates (12).

4. The annular ring measuring device based on image recognition according to claim 3 is characterized in that: A searchlight (31) for adjusting brightness is installed beside the image collector (3).

5. The annular ring measurement device based on image recognition according to any one of claims 1 to 4, characterized in that: The camera on the image collector (3) is connected by a ball joint.

6. The annular ring measurement device based on image recognition according to claim 1, characterized in that: The arc-shaped support plate (12) adopts a semicircular ring structure.

7. The annular ring measurement device based on image recognition according to claim 6, characterized in that: The arc angle of the arc-shaped support plate (12) ranges from 150° to 180°.

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