Brick surface quality detection machine

Abstract

A brick surface quality detection machine comprises a conveying belt, a detection mechanism, a lifting mechanism, a height measurement mechanism and a control system, and the conveying belt conveys a to-be-detected brick; the detection mechanism comprises a linear light source and a visual camera, the linear light source obliquely irradiates on the conveying belt, and the visual camera is arranged above the linear light source to shoot and scan bricks irradiated by the visual camera; the lifting mechanism drives the detection mechanism to move up and down to keep the intersection point of the visual camera and the linear light source always located on the brick; the height measuring mechanism is located at the upper end of the conveying direction, height detection is conducted on bricks conveyed from the position above the conveying direction of the conveying belt through the height measuring mechanism, a signal is fed back to the control system, and the control system controls the lifting mechanism to drive the detection mechanism to ascend and descend. The linear light source always irradiates the surface of the brick, and the visual camera focuses on the surface of the brick, so that the device can adapt to detection of different types of bricks, the adaptability of the device is improved, frequent equipment debugging is not needed, the working efficiency is improved, and the practicability is very high.

Description

Technical Field

[0001] The utility model belongs to brick quality detection equipment, in particular to a brick surface quality detection machine. Background Art

[0002] Bricks are a kind of acid- and alkali-resistant porcelain or stone building or decorative material formed by grinding, mixing, pressing, glazing, and sintering refractory metal oxides and semi-metal oxides. The brick production process is relatively complicated, involving grinding, mixing, pressing, glazing, sintering and other links. Among them, bricks used for exterior decoration have good smoothness and flatness, and should not have cracks or defects visible to the naked eye. Under sufficient natural light or fluorescent light, the bricks are placed 1 meter away and observed vertically, and no obvious surface defects should be seen. The pattern of patterned bricks should be delicate and realistic, without obvious defects such as color loss, broken lines, and dislocation. The shading and trademarks on the back of high-quality decorative brick products are clear and complete, with few glaze marks or defects, so it is necessary to test the surface quality of bricks after production to avoid inferior bricks from entering the market. At present, the detection of brick surface defects is mainly done manually. Manual inspection is easily affected by light brightness, brick surface color, and personal mental state, and there are problems of missed detection and false detection, and the detection efficiency is low. Therefore, studying a brick surface defect detection device to realize the detection of surface defects in the brick production process is of great significance to improving enterprise production efficiency and reducing enterprise labor costs.

[0003] With the development of machine vision, machine vision has begun to be used in many fields to participate in product quality inspection. However, due to the limitation that when producing different types of bricks, the light source and the visual camera need to adjust the height position according to the thickness of the bricks. Every time the type of brick to be inspected is changed, the equipment needs to be debugged, which is extremely inconvenient and needs to be improved. Utility Model Content

[0004] The utility model aims to overcome the shortcomings of the prior art and provide a brick surface quality detection machine.

[0005] The utility model adopts the following technical solutions:

[0006] A brick surface quality inspection machine comprises a conveyor belt, a bracket, a detection mechanism, a lifting mechanism, a height measurement mechanism and a control system. The conveyor belt is connected to the brick machine for conveying bricks; the bracket is erected above the conveyor belt;

[0007] The detection mechanism is arranged on a bracket, and includes a linear light source and a visual camera. The linear light source is obliquely irradiated on the conveyor belt, and the visual camera is arranged above the linear light source to shoot and scan the bricks irradiated by the linear light source.

[0008] The lifting mechanism is arranged between the bracket and the detection mechanism, and drives the detection mechanism to move back and forth in the vertical direction on the bracket to keep the intersection point of the visual camera and the linear light source always located on the brick;

[0009] A height measuring mechanism is arranged on the bracket to detect the height of bricks on the conveyor belt, the height measuring mechanism is located at the upper end of the conveyor belt in the conveying direction, and the detection mechanism is located at the lower end of the conveyor belt in the conveying direction;

[0010] The control system is connected with the detection mechanism, the lifting mechanism and the height measuring mechanism respectively, and controls the lifting mechanism to drive the detection mechanism to rise and fall according to the signal fed back by the height measuring mechanism to adapt to the height of the bricks.

[0011] Preferably, the detection mechanism also includes a mounting plate, which is arranged on the lifting mechanism and driven to rise and fall by the lifting mechanism, and the linear light source is arranged on the mounting plate, and its light irradiation direction is opposite to the conveying direction of the conveyor belt and inclined downward; the visual camera is arranged on the mounting plate and is located above the linear light source and its focus intersects with the light emitted by the linear light source.

[0012] Preferably, a probe is provided on the mounting plate, and two proximity switches are provided on the bracket. The proximity switches are respectively located on the upper and lower sides of the probe. The probe contacts the proximity switches on the upper and lower sides respectively as the mounting plate moves. The proximity switch is connected to the control system, and the movement of the mounting plate is controlled according to the signal fed back by the proximity switch to limit the moving range.

[0013] Preferably, the linear light source has an inclination angle of 45°.

[0014] Preferably, the lifting mechanism includes an electric slide and a servo motor. The electric slide is arranged on the bracket in a vertical direction, and the mounting plate is arranged on the electric slide to move back and forth. The servo motor is arranged on the bracket and connected to the electric slide to drive the electric slide to drive the mounting plate to move up and down.

[0015] Preferably, the height measuring mechanism includes an extension rod and a 3D camera, one end of the extension rod is fixed on the bracket, and the other end extends vertically outward along the conveying direction of the conveyor belt to the upper end of the conveying direction of the conveyor belt; the 3D camera is connected to the control system, and is arranged at the other end of the extension rod opposite to the conveyor belt below, and measures the height of the bricks passing by and feeds back the signal to the control system.

[0016] Preferably, the bracket includes a base straddling above the conveyor belt and a mounting seat arranged on the base and extending in a vertical direction, the detection mechanism, lifting mechanism and height measuring mechanism are arranged on the mounting seat, and the control system is arranged in the mounting seat and connected to each component.

[0017] It can be seen from the above description of the utility model that, compared with the prior art, the utility model has the following beneficial effects: the height of the bricks transported from above the conveying direction of the conveyor belt is detected by the height measuring mechanism, and the signal is fed back to the control system, and the control system controls the lifting mechanism to drive the detection mechanism to lift, so that the linear light source is always irradiated on the surface of the brick and the visual camera is focused on the surface of the brick, which can adapt to the detection of different types of bricks, improve the adaptability of the device, do not need to frequently debug the equipment, improve work efficiency, and have high practicality;

[0018] The focus of the visual camera intersects with the light emitted by the linear light source, and the lifting mechanism can drive both to rise and fall in unison, quickly raising and lowering the intersection point to the brick surface without the need to adjust the visual camera or the linear light source separately, further improving work efficiency.

[0019] Probes and proximity switches limit the movement of the mounting plate to prevent damage to the device due to excessive movement. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0021] Figure 2 It is the front view of the utility model;

[0022] Figure 3 This is a schematic diagram of the structure of the first embodiment of the utility model;

[0023] Figure 4 for Figure 3 A partial enlarged view of the middle A;

[0024] Figure 5 This is a schematic diagram of the structure of the second embodiment of the present utility model;

[0025] In the figure: 1- conveyor belt, 2- bracket, 21- base, 22- mounting seat, 3- detection mechanism, 31- mounting plate, 32- linear light source, 33- visual camera, 34- probe, 35- proximity switch, 4- lifting mechanism, 41- electric slide, 42- servo motor, 5- height measurement mechanism, 51- extension rod, 52- 3D camera. DETAILED DESCRIPTION

[0026] The present invention is further described below through specific implementation methods.

[0027] Embodiment 1:

[0028] Reference Figures 1 to 4 As shown, a brick surface quality detection machine includes a conveyor belt 1, a bracket 2, a detection mechanism 3, a lifting mechanism 4, a height measuring mechanism 5, and a control system.

[0029] The conveyor belt 1 is connected to the end of the brick production line and is used to convey the bricks to be tested after sintering.

[0030] The support 2 is erected above the conveyor belt 1 , and the support 2 includes a base 21 straddling above the conveyor belt 1 and a mounting base 22 arranged on the base 21 and extending in a vertical direction.

[0031] The detection mechanism 3 is arranged on the mounting seat 22, and includes a mounting plate 31, a linear light source 32 and a visual camera 33. The mounting plate 31 can be raised and lowered on the mounting seat 22; the linear light source 32 is arranged on the mounting plate 31 and obliquely illuminates the conveyor belt 1, and its light irradiation direction is opposite to the conveying direction of the conveyor belt 1 and is inclined downward by 45°; the visual camera 33 is provided with one, which is arranged at the center of the mounting plate 31 and above the linear light source 32 to shoot and scan the bricks illuminated by it, and the focus of the visual camera 33 intersects with the light emitted by the linear light source 32, so that the intersection point can be raised and lowered to the surface of the brick by lifting the mounting plate 31, and there is no need to adjust the visual camera 33 or the linear light source 32 separately, thereby further improving work efficiency. Specifically, a probe 34 is arranged on the mounting plate 31, and two proximity switches 35 are arranged on the bracket 2. The proximity switches 35 are respectively located on the upper and lower sides of the probe 34, and the probe 34 contacts the proximity switches 35 on the upper and lower sides respectively as the mounting plate 31 moves.

[0032] The lifting mechanism 4 is arranged on the mounting seat 22 and connected to the mounting plate 31, driving the mounting plate 31 to move back and forth along the vertical direction on the mounting seat 22 to keep the intersection of the visual camera 33 and the linear light source 32 always located on the brick. The lifting mechanism 4 includes an electric slide 41 and a servo motor 42. The electric slide 41 is arranged on the bracket 2 along the vertical direction, and the mounting plate 31 is arranged on the electric slide 41 to move back and forth; the servo motor 42 is arranged on the bracket 2 and connected to the electric slide 41 to drive the electric slide 41 to drive the mounting plate 31 to move up and down.

[0033] The height measuring mechanism 5 is arranged on the bracket 2 to detect the height of the bricks on the conveyor belt 1. The height measuring mechanism 5 is located at the upper end of the conveying direction of the conveyor belt 1, and the detection mechanism 3 is located at the lower end of the conveying direction of the conveyor belt 1. The height measuring mechanism 5 includes an extension rod 51 and a 3D camera 52. One end of the extension rod 51 is fixed on the bracket 2, and the other end extends vertically outward along the conveying direction of the conveyor belt 1 to the upper end of the conveying direction of the conveyor belt 1; the 3D camera 52 is arranged at the other end of the extension rod 51, opposite to the conveyor belt 1 below, and measures the height of the bricks passing by. Specifically, the 3D camera 52 is a binocular stereo vision camera commonly used in the prior art, which can be used to detect the height of an object. It is not the focus of this application, and its structure and selection are not further described here.

[0034] The control system is arranged in the mounting seat 22 and is respectively connected to the visual camera 33, the proximity switch 35, the servo motor 42, and the 3D camera 52, including a visual controller and a PLC controller. The visual controller can judge the brick height according to the feedback image of the 3D camera 52, and feed back the signal to the PLC controller. The PLC controller controls the servo motor 42 to drive the detection mechanism 3 to rise and fall so that it adapts to the required height of the brick to be detected. The position of the probe 34 can also be detected according to the proximity switch 35 to determine the range of movement of the mounting plate 31, so as to avoid damage caused by excessive movement of the mounting plate 31. Specifically, the control system is a PLC control system.

[0035] Embodiment 2:

[0036] like Figure 5 As shown, the difference between this embodiment and the first embodiment is that two visual cameras 33 are provided, which are symmetrically arranged on both sides of the mounting plate 31 and above the linear light source 32, and their focal points intersect with the light emitted by the linear light source 32.

[0037] When the device is working, when the brick to be inspected is transported to the bottom of the 3D camera 52 via the conveyor belt 1, the 3D camera 52 detects the height of the brick and feeds back the signal to the control system. The control system controls the servo motor 42 to drive the mounting plate 31 to move so that the visual camera 33 and the linear light source 32 are lifted and lowered to a position suitable for the height of the brick to be inspected (i.e., the intersection of the light irradiated by the linear light source 32 on the surface of the brick coincides with the intersection of the visual camera 33). When the brick passes under the visual camera 33, the visual camera 33 collects the image and feeds back the image to the control system. The control system distinguishes the bricks with defects on the surface and marks them. The height measuring mechanism 5 detects the height of the bricks transported from the conveying direction of the conveyor belt 1, and feeds back the signal to the control system. The control system controls the lifting mechanism 4 to drive the detection mechanism 3 to lift and lower, so that the linear light source 32 always irradiates the surface of the brick and the visual camera 33 focuses on the surface of the brick. It can adapt to the detection of different types of bricks, improve the adaptability of the device, do not need to frequently debug the equipment, improve work efficiency, and has high practicality.

[0038] The above description is only a preferred embodiment of the present utility model, and therefore cannot be used to limit the scope of implementation of the present utility model. That is, equivalent changes and modifications made according to the scope of the patent application of the present utility model and the contents of the specification should still fall within the scope covered by the patent of the present utility model.

Claims

1. A brick surface quality inspection machine, characterized by: It includes a conveyor belt, a bracket, a detection mechanism, a lifting mechanism, a height measuring mechanism and a control system. The conveyor belt is connected to the brick machine for conveying bricks; the bracket is erected above the conveyor belt; The detection mechanism is arranged on a bracket, and includes a linear light source and a visual camera. The linear light source is obliquely irradiated on the conveyor belt, and the visual camera is arranged above the linear light source to shoot and scan the bricks irradiated by the linear light source. The lifting mechanism is arranged between the bracket and the detection mechanism, and drives the detection mechanism to move back and forth in the vertical direction on the bracket to keep the intersection point of the visual camera and the linear light source always located on the brick; A height measuring mechanism is arranged on the bracket to detect the height of bricks on the conveyor belt, the height measuring mechanism is located at the upper end of the conveyor belt in the conveying direction, and the detection mechanism is located at the lower end of the conveyor belt in the conveying direction; The control system is connected with the detection mechanism, the lifting mechanism and the height measuring mechanism respectively, and controls the lifting mechanism to drive the detection mechanism to rise and fall according to the signal fed back by the height measuring mechanism to adapt to the height of the bricks.

2. A brick surface quality inspection machine according to claim 1, characterized in that: The detection mechanism also includes a mounting plate, which is arranged on the lifting mechanism and driven to rise and fall by the lifting mechanism. The linear light source is arranged on the mounting plate, and its light irradiation direction is opposite to the conveying direction of the conveyor belt and inclined downward; the visual camera is arranged on the mounting plate and is located above the linear light source and its focus intersects with the light emitted by the linear light source.

3. A brick surface quality inspection machine according to claim 2, characterized in that: A probe is provided on the mounting plate, and two proximity switches are provided on the bracket. The proximity switches are respectively located on the upper and lower sides of the probe. The probe contacts the proximity switches on the upper and lower sides respectively as the mounting plate moves. The proximity switches are connected to the control system, and the movement of the mounting plate is controlled according to the signal fed back by the proximity switches to limit the movement range.

4. A brick surface quality inspection machine according to claim 2, characterized in that: The linear light source has an inclination angle of 45°.

5. The brick surface quality inspection machine according to claim 2, characterized in that: The lifting mechanism includes an electric slide and a servo motor. The electric slide is arranged on the bracket in a vertical direction, and the mounting plate is arranged on the electric slide to move back and forth. The servo motor is arranged on the bracket and connected to the electric slide to drive the electric slide to drive the mounting plate to move up and down.

6. The brick surface quality inspection machine according to claim 1, characterized in that: The height measuring mechanism includes an extension rod and a 3D camera, one end of the extension rod is fixed on the bracket, and the other end extends vertically outward along the conveying direction of the conveyor belt to the upper end of the conveying direction of the conveyor belt; the 3D camera is connected to the control system, and is arranged at the other end of the extension rod opposite to the conveyor belt below to measure the height of the bricks passing by and feed back the signal to the control system.

7. The brick surface quality inspection machine according to claim 1, characterized in that: The support comprises a base straddling above the conveyor belt and a mounting seat arranged on the base and extending in a vertical direction. The detection mechanism, lifting mechanism and height measuring mechanism are arranged on the mounting seat. The control system is arranged in the mounting seat and connected with various components.

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