Detection device for measuring large outer diameter in small visual field

Abstract

The utility model discloses a detection device for measuring a large outer diameter in a small visual field, and relates to the technical field of visual detection devices. The device comprises a visual group, a loosening and clamping group and a to-be-detected object, the visual group comprises an industrial camera, a telecentric lens and a mounting seat, the industrial camera and the telecentric lens are limited on the mounting seat through a locking seat, the industrial camera and the telecentric lens are oppositely arranged, a gap between the industrial camera and the telecentric lens forms a detection port, and the to-be-detected object is located in the detection port. A to-be-detected object is locked and installed on the loose clamping set, and the side end of the to-be-detected object is not in contact with the detection opening. The device can be suitable for measuring various objects made of different materials and having different surface characteristics, such as metal, plastic and objects in various shapes, such as cylinders and ellipses; and meanwhile, the device is suitable for online detection on a production line, such as large pipelines and barrels. According to the device structure, a non-contact measurement mode is adopted, so that damage or pollution possibly caused by direct contact with a measured object is avoided, and the measurement safety and reliability are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of visual detection devices, in particular to a detection device for measuring large outer diameters with a small visual field. Background Art

[0002] At the heart of precision manufacturing, the grinding wheel, an indispensable grinding tool, precisely sculpts the product's geometric accuracy and surface quality with every interaction with the workpiece. Traditional outer diameter inspection methods typically use contact measurement, but this approach suffers from low efficiency and the risk of product damage. In recent years, with the development of non-contact visual inspection technology, visual inspection has increasingly replaced traditional contact inspection. However, when inspecting large-diameter objects, traditional visual inspection devices often struggle to meet high-precision requirements due to limited field of view. Utility Model Content

[0003] The utility model provides a detection device for measuring large outer diameters in a small visual field, which overcomes the shortcomings described in the background technology.

[0004] The technical solution adopted by the utility model to solve its technical problems is:

[0005] A detection device for measuring large outer diameters with a small field of view includes a vision group, a loose clamping group, and an object to be measured (grinding wheel). The vision group includes an industrial camera, a telecentric lens, and a mounting seat. The industrial camera and the telecentric lens are limited on the mounting seat by a locking seat. The industrial camera and the telecentric lens are arranged opposite to each other. The gap between the industrial camera and the telecentric lens forms a detection port. The object to be measured (grinding wheel) is locked and mounted on the loose clamping group, and the side end of the object to be measured (grinding wheel) does not contact the detection port.

[0006] The device can be used in industrial applications that require high-precision detection, such as large grinding wheels, large pipes, cylinders, etc.

[0007] A preferred technical solution: the clamping assembly includes a main shaft and a servo motor, and the output end of the servo motor is connected to the main shaft.

[0008] A preferred technical solution: it also includes a column, the visual group is installed on the column, an adjustment mechanism is set in the column, and the relative position of the visual group is adjusted by the adjustment mechanism.

[0009] A preferred technical solution: the visual group is displaced in the vertical direction through an adjustment mechanism.

[0010] A preferred technical solution: The adjustment mechanism is composed of a linear module and a drag chain. A sliding module is set on the linear module. One end of the drag chain is connected to the linear module, and the other end is connected to the side end of the module.

[0011] A preferred technical solution: The back of the mounting base is locked and mounted on the module.

[0012] A better technical solution: The linear module includes a linear guide, a ball screw, a support seat, a coupling, and a servo motor. The module moves along the linear guide. The module is threadedly connected to the ball screw. The ball screw is connected to the output end of the servo motor through a coupling. The servo motor is installed on the support seat.

[0013] A preferred technical solution: The lens of the industrial camera is a high-resolution lens.

[0014] A preferred technical solution: further comprising a control system, wherein the control system is electrically connected to each servo motor.

[0015] By adopting the above technical solution, the beneficial effects of the utility model are:

[0016] 1. This utility model is suitable for objects of various materials and surface characteristics, such as metal, plastic, etc., as well as objects of various shapes, such as cylindrical, elliptical, etc.; it is also suitable for online detection on production lines, such as large pipes, cylinders, etc.

[0017] 2. The device structure in the utility model adopts a non-contact measurement method to avoid damage or contamination that may be caused by direct contact with the object being measured, thereby improving the safety and reliability of the measurement.

[0018] 3. The utility model has a compact structure, is easy to install and maintain, and is convenient to integrate with existing production line equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0020] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0021] Figure 2 It is a structural diagram of the regulating mechanism;

[0022] Figure 3 This is a structural diagram of the linear module.

[0023] Description of main reference numerals:

[0024] 1. Vision group; 11. Industrial camera; 12. Telecentric lens; 13. Mounting seat; 14. Locking seat; 2. Clamp release group; 21. Spindle; 3. Grinding wheel; 4. Inspection port; 5. Column; 51. Adjustment mechanism; 511. Linear module; 5111. Linear guide; 5112. Ball screw; 5113. Support seat; 5114. Coupling; 5115. Servo motor; 512. Drag chain; 513. Module. DETAILED DESCRIPTION

[0025] like Figure 1-Figure 3 As shown, a detection device for measuring large outer diameter with a small field of view includes a vision group 1, a clamping group 2, and a grinding wheel 3. The vision group 1 includes an industrial camera 11, a telecentric lens 12, and a mounting seat 13. The industrial camera 11 and the telecentric lens 12 are limited on the mounting seat 13 by a locking seat 14. The industrial camera 11 and the telecentric lens 12 are arranged opposite to each other. The gap between the industrial camera 11 and the telecentric lens 12 forms a detection port 4. The grinding wheel 3 is locked and installed on the clamping group 2, and the side end of the grinding wheel 3 does not contact the detection port 4.

[0026] Furthermore, the clamping assembly 2 includes a main shaft 21 and a servo motor, and the output end of the servo motor is connected to the main shaft 21 .

[0027] Furthermore, it also includes a column 5, the visual group 1 is installed on the column 5, an adjustment mechanism 51 is set in the column 5, and the relative position of the visual group 1 is adjusted by the adjustment mechanism 51.

[0028] Furthermore, the visual group 1 is displaced in the vertical direction by the adjustment mechanism 51 .

[0029] Furthermore, the adjustment mechanism 51 is composed of a linear module 511 and a drag chain 512 . A sliding module 513 is provided on the linear module 511 . One end of the drag chain 512 is connected to the linear module 511 , and the other end is connected to the side end of the module 513 .

[0030] Furthermore, the back side of the mounting base 13 is locked and mounted on the module 513 .

[0031] Furthermore, the linear module 511 includes a linear guide 5111, a ball screw 5112, a support seat 5113, a coupling 5114, and a servo motor 5115. The module 513 moves along the linear guide 5111. The module 513 is threadedly connected to the ball screw 5112. The ball screw 5112 is connected to the output end of the servo motor 5115 through the coupling 5114. The servo motor 5115 is installed on the support seat 5113.

[0032] Furthermore, the lens of the industrial camera 11 is a high-resolution lens.

[0033] Furthermore, it also includes a control system, which is electrically connected to each servo motor.

[0034] When the detection device for measuring large outer diameter with small field of view in the present invention is used, taking the grinding wheel 3 as an example, the grinding wheel 3 is fixed to the loose clamping group 2, and the Z axis (i.e., vertical direction) loads the small field of view-visual group 1 downward for positioning movement, and the spindle 21 on the loose clamping group 2 rotates at a constant speed; the lens of the visual group 1 is matched with the rotation of the loose clamping group 2 to read the image in real time and measure it indirectly. Regarding the algorithm, the following algorithms and methods can be applied for coordination. The algorithm simulates an axial position through preliminary calibration and solidifies it in the image algorithm. The axial position is converted into large diameter data through indirect measurement and timely calling the current position of the grinding wheel 3; the key parameters such as the diameter and radial runout of the grinding wheel 3 are measured through the above detection principle.

[0035] The above description is merely a preferred embodiment of the present invention and therefore cannot be used to limit the scope of implementation of the present invention. In other words, equivalent changes and modifications made according to the patent scope of the present invention and the contents of the specification should still fall within the scope of the present invention.

Claims

1. A detection device for measuring large outer diameters in a small field of view, characterized in that: The invention comprises a vision group, a loose clamp group and an object to be measured. The vision group comprises an industrial camera, a telecentric lens and a mounting seat. The industrial camera and the telecentric lens are limited on the mounting seat by a locking seat. The industrial camera and the telecentric lens are arranged opposite to each other. The gap between the industrial camera and the telecentric lens forms a detection port. The object to be measured is locked and mounted on the loose clamp group, and the side end of the object to be measured does not contact the detection port.

2. The detection device for measuring large outer diameter with a small field of view according to claim 1, characterized in that: The clamping assembly includes a main shaft and a servo motor, and the output end of the servo motor is connected to the main shaft.

3. The detection device for measuring large outer diameter with a small field of view according to claim 1, characterized in that: It also includes a column, the visual group is installed on the column, an adjustment mechanism is set in the column, and the relative position of the visual group is adjusted by the adjustment mechanism.

4. The detection device for measuring large outer diameter with a small field of view according to claim 3, characterized in that: The visual group is displaced in the vertical direction by an adjusting mechanism.

5. The detection device for measuring large outer diameter with a small field of view according to claim 4, characterized in that: The adjustment mechanism is composed of a linear module and a drag chain. A sliding module is provided on the linear module. One end of the drag chain is connected to the linear module, and the other end is connected to the side end of the module.

6. The detection device for measuring large outer diameter with a small field of view according to claim 5, characterized in that: The back side of the mounting base is locked and mounted on the module.

7. The detection device for measuring large outer diameters with a small field of view according to claim 5, characterized in that: The linear module includes a linear guide rail, a ball screw, a support seat, a coupling, and a servo motor. The module moves along the linear guide rail. The module is threadedly connected to the ball screw. The ball screw is connected to the output end of the servo motor through a coupling. The servo motor is installed on the support seat.

8. The detection device for measuring large outer diameter with a small field of view according to claim 1, characterized in that: The lens of the industrial camera is a high-resolution lens.

9. The detection device for measuring large outer diameters with a small field of view according to claim 1, characterized in that: The system also includes a control system, which is electrically connected to each servo motor.

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