Detection cabinet based on machine vision

Abstract

The utility model discloses a detection cabinet based on machine vision, which relates to the technical field of visual inspection and comprises a detection cabinet body, a detection platform is fixedly connected to the middle of an inner cavity of the detection cabinet body, a pneumatic supporting telescopic rod is embedded in the center of the detection platform, and an inner rod of the pneumatic supporting telescopic rod is upwards and fixedly connected with a lower supporting negative pressure suction cup. A to-be-detected mobile phone shell is adsorbed and fixed to the lower supporting negative pressure suction cup, and the two sides of the top of the inner wall of the detection cabinet body are fixedly connected with a linear scanning camera and an LED stripe pattern light source correspondingly. When the surface of the mobile phone shell to be detected is scratched, sunken and subtle flaws and defects, light emission is deformed and lacked, the linear scanning camera can more visually distinguish the defects on the surface of the mobile phone shell to be detected through the collected reflected light image, the distinguishing accuracy is higher, a large number of cameras do not need to be used, and the detection efficiency is improved. And the detection cost is lower.

Description

Technical Field

[0001] The utility model relates to the technical field of visual detection, in particular to a detection cabinet based on machine vision. Background Art

[0002] With the popularization of the Internet, smartphones have an increasingly larger share in the market. At the same time, mobile phone manufacturers have also put forward strict requirements for the quality inspection of mobile phone parts. Taking the detection of mobile phone shell defects as an example, current parts manufacturers mostly rely on manual visual inspection to detect defects in mobile phone shells. Using visual inspection methods is prone to false detection and missed detection. Therefore, there is an urgent need for equipment that can realize automatic detection of surface defects of mobile phone shells.

[0003] There are currently devices that use machine vision for inspection, but machine vision is affected by the acquisition angle and light, and its efficiency in detecting small defects on the surface of the mobile phone casing is low, and it is easy to miss detections. To this end, we propose a machine vision-based inspection cabinet. Utility Model Content

[0004] The present utility model aims to address the increasing market share of smartphones with the widespread adoption of the internet. At the same time, mobile phone manufacturers have imposed strict quality control requirements on mobile phone parts and components. For example, in the case of mobile phone casing defect detection, current parts manufacturers often rely on manual visual inspection. This visual inspection method is prone to false detections and missed detections. The present utility model provides an inspection cabinet based on machine vision.

[0005] In order to achieve the above-mentioned purpose, the present invention specifically adopts the following technical solutions:

[0006] A machine vision-based inspection cabinet comprises an inspection cabinet body, an inspection platform fixedly connected to the middle of an inner cavity of the inspection cabinet body, and a pneumatic support telescopic rod buried in the center of the inspection platform, an inner rod of the pneumatic support telescopic rod fixedly connected upward with a lower supporting negative pressure suction cup, and a mobile phone housing to be inspected is adsorbed and fixed on the lower supporting negative pressure suction cup, and a linear scanning camera and an LED stripe pattern light source are fixedly connected to both sides of the top of the inner wall of the inspection cabinet body, respectively, and the linear scanning camera and the LED stripe pattern light source are both arranged facing the mobile phone housing to be inspected.

[0007] Furthermore, another pair of linear scanning cameras and LED stripe pattern light sources are fixedly connected to both sides of the upper end of the detection platform, and a face-changing pneumatic telescopic rod is fixedly connected to the center of the top of the inner wall of the detection cabinet, and the inner rod of the face-changing pneumatic telescopic rod is fixedly connected downward with an upper lifting negative pressure suction cup.

[0008] Furthermore, an air source is placed at the bottom of the inner cavity of the detection cabinet, and the output end of the air source is connected to the pneumatic support telescopic rod, the lower support negative pressure suction cup, the surface changing pneumatic telescopic rod and the upper lifting negative pressure suction cup air connection end through an air path distribution valve and a hose.

[0009] Furthermore, a data transfer computer is fixedly connected to the bottom of the detection platform corresponding to the inner cavity of the detection cabinet, and the signal receiving end and power supply terminal of the data transfer computer are respectively connected to the linear scanning camera and the LED stripe pattern light source through cables.

[0010] Furthermore, a square through hole is provided on the front side of the detection cabinet corresponding to the upper end of the detection platform, and a cabinet door is fixedly connected to the side of the upper side of the detection cabinet corresponding to the square through hole through a hinge, and an operating handle is fixedly connected to the outer end of the cabinet door away from the hinge.

[0011] Furthermore, a magnetic adhesive strip is fixedly connected to the contact position between the front of the detection cabinet and the back of the cabinet door, and the magnetic properties of the magnetic adhesive strips on the detection cabinet and the cabinet door are opposite to each other.

[0012] Furthermore, an observation window is provided at the center of the cabinet door, and an observation glass is fixedly connected to the observation window.

[0013] The beneficial effects of the utility model are as follows:

[0014] 1. The utility model is provided with a pneumatic support telescopic rod and a lower supporting negative pressure suction cup. The lower supporting negative pressure suction cup can adsorb and fix the mobile phone casing to be inspected. Through the provided line scanning camera and LED stripe pattern light source, the LED stripe pattern light source projects high-speed stripe light toward the surface of the mobile phone casing to be inspected. The line scanning camera is used to collect the reflection of the stripe light on the surface of the mobile phone casing to be inspected. Based on the visual system of the Keyence XGX+Lumi Trax mirror reflection mode, the light emission will be distorted and missing at small scratches, dents and subtle defects on the surface of the mobile phone casing to be inspected. The line scanning camera can more intuitively identify the defects on the surface of the mobile phone casing to be inspected through the collected reflected light image, with higher resolution accuracy, without the need to use a large number of cameras, and lower detection costs.

[0015] 2. The utility model provides a face-changing pneumatic telescopic rod and an upper-lifting negative-pressure suction cup. The face-changing pneumatic telescopic rod can drive the upper-lifting negative-pressure suction cup to descend and contact and adsorb the upper end of the mobile phone shell to be inspected, and then lift the negative-pressure suction cup down to release the mobile phone shell to be inspected. The face-changing pneumatic telescopic rod drives the mobile phone shell to be inspected to rise, so that the bottom surface of the mobile phone shell to be inspected is exposed to the field of view of the linear scanning camera fixed on the inspection platform, and the LED stripe pattern light source on the inspection platform projects stripe light to inspect the bottom surface defects of the mobile phone shell to be inspected, which improves the comprehensiveness of the inspection of the mobile phone shell to be inspected, realizes automatic face changing, is simple to operate, and has higher inspection efficiency.

[0016] 3. The utility model provides square through-holes to facilitate the placement and removal of the mobile phone casing to be tested. The cabinet door can be opened and closed to facilitate the placement and removal of the mobile phone casing to be tested. At the same time, the square through-holes on the front side of the detection cabinet are blocked when the mobile phone casing to be tested is being tested, thereby reducing the interference of external light sources on the detection. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a three-dimensional diagram of the utility model;

[0018] Figure 2 It is a front sectional view of the utility model;

[0019] Figure 3 It is a top sectional view of the utility model;

[0020] Figure 4 It is a front view of the cabinet door of the utility model after being opened.

[0021] Figure numerals: 1. Inspection cabinet; 2. Inspection platform; 3. Pneumatic support telescopic rod; 4. Lower support negative pressure suction cup; 5. Mobile phone casing to be inspected; 6. Linear scanning camera; 7. LED stripe pattern light source; 8. Surface-changing pneumatic telescopic rod; 9. Upper lifting negative pressure suction cup; 10. Cabinet door; 11. Observation glass; 12. Operating handle; 13. Air source; 14. Data transfer computer. DETAILED DESCRIPTION

[0022] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention.

[0023] See also Figure 1 - Figure 4The utility model provides a detection cabinet based on machine vision, including a detection cabinet body 1, a detection platform 2 is fixedly connected to the middle of the inner cavity of the detection cabinet body 1, and a pneumatic support telescopic rod 3 is buried in the center of the detection platform 2, the inner rod of the pneumatic support telescopic rod 3 is fixedly connected upward with a lower supporting negative pressure suction cup 4, and the lower supporting negative pressure suction cup 4 is adsorbed and fixed with a mobile phone shell 5 to be detected, and a linear scanning camera 6 and an LED stripe pattern light source 7 are fixedly connected on both sides of the top of the inner wall of the detection cabinet body 1, and the linear scanning camera 6 and the LED stripe pattern light source 7 are both set facing the mobile phone shell 5 to be detected.

[0024] In this embodiment, preferably, another pair of linear scanning cameras 6 and LED stripe pattern light sources 7 are fixedly connected on both sides of the upper end of the detection platform 2, and a face-changing pneumatic telescopic rod 8 is fixedly connected to the center of the top of the inner wall of the detection cabinet 1, and the inner rod of the face-changing pneumatic telescopic rod 8 is fixedly connected to an upper lifting negative pressure suction cup 9 downwardly; through the provided face-changing pneumatic telescopic rod 8 and the upper lifting negative pressure suction cup 9, the face-changing pneumatic telescopic rod 8 can drive the upper lifting negative pressure suction cup 9 to descend and contact and adsorb with the upper end of the mobile phone shell 5 to be detected, and then the negative pressure suction cup 4 is lifted down to release the mobile phone shell 5 to be detected, and the face-changing pneumatic telescopic rod 8 drives the mobile phone shell 5 to be detected to rise, so that the bottom surface of the mobile phone shell 5 to be detected is exposed to the field of view of the linear scanning camera 6 fixed on the detection platform 2, and the LED stripe pattern light source 7 on the detection platform 2 is used to project stripe light to inspect the bottom surface defects of the mobile phone shell 5 to be detected, thereby improving the comprehensiveness of the inspection of the mobile phone shell 5 to be detected, realizing automatic face changing, simple operation and higher detection efficiency.

[0025] In this embodiment, preferably, an air source 13 is placed at the bottom of the inner cavity of the detection cabinet 1, and the output end of the air source 13 is connected to the air connection ends of the pneumatic support telescopic rod 3, the lower support negative pressure suction cup 4, the surface changing pneumatic telescopic rod 8 and the upper lifting negative pressure suction cup 9 through an air path distribution valve and a hose; through the set air source 13, the air source 13 can drive the pneumatic support telescopic rod 3 and the surface changing pneumatic telescopic rod 8 to extend and retract, and provide negative pressure for the adsorption of the lower support negative pressure suction cup 4 and the upper lifting negative pressure suction cup 9.

[0026] In this embodiment, preferably, the inner cavity of the detection cabinet 1 corresponds to the bottom of the detection platform 2 and is fixedly connected to a data transfer computer 14, and the signal receiving end and power supply terminal of the data transfer computer 14 are respectively connected to the linear scanning camera 6 and the LED stripe pattern light source 7 through cables; through the set data transfer computer 14, the data transfer computer 14 can supply power to the linear scanning camera 6 and the LED stripe pattern light source 7, receive image data collected by the linear scanning camera 6, and connect to the big data image processing server through the communication network to provide data transfer for image processing.

[0027] In this embodiment, preferably, a square through hole is opened on the front side of the detection cabinet 1 corresponding to the upper end of the detection platform 2, and a cabinet door 10 is fixedly connected to the side of the upper side of the detection cabinet 1 corresponding to the side with the square through hole through a hinge, and an operating handle 12 is fixedly connected to the outer side of the cabinet door 10 away from the hinge end; the square through hole is provided to facilitate the placement and removal of the mobile phone casing 5 to be tested, and the cabinet door 10 is provided to facilitate the opening and closing of the cabinet door 10 to facilitate the placement and removal of the mobile phone casing 5 to be tested, while blocking the front square through hole of the detection cabinet 1 when the mobile phone casing 5 to be tested is being tested, thereby reducing the interference of external light sources on the detection.

[0028] In this embodiment, preferably, a magnetic adhesive strip is fixedly connected to the contact position between the front of the detection cabinet 1 and the back of the cabinet door 10, and the magnetic properties of the magnetic adhesive strips on the opposite sides of the detection cabinet 1 and the cabinet door 10 are opposite; through the set magnetic adhesive strip, the sealing of the release position of the detection cabinet 1 and the cabinet door 10 is ensured, external light is prevented from entering to interfere with the detection, and an adsorption and fixing effect can be provided after the cabinet door 10 is closed.

[0029] In this embodiment, preferably, an observation window is opened in the center of the cabinet door 10, and an observation glass 11 is fixedly connected to the observation window; through the observation glass 11, which is supported by one-way light-transmitting glass, it is possible to observe whether the light inside the detection cabinet 1 is on, thereby ensuring the normal progress of the detection, and preventing external light from passing through to affect the detection.

[0030] The working principle and usage process of the present invention are as follows: when the device is used, the pneumatic support telescopic rod 3 and the lower support negative pressure suction cup 4 are provided, and the lower support negative pressure suction cup 4 can adsorb and fix the mobile phone casing 5 to be inspected. The line scan camera 6 and the LED stripe pattern light source 7 are provided. The line scan camera 6 uses a line scan camera launched by Keyence with a shooting speed of 142,800 lines per second, and the LED stripe pattern light source 7 uses a high-speed stripe pattern emitting LED light source to generate multiple images suitable for different purposes in one shot. The LED stripe pattern light source 7 projects high-speed stripe light toward the surface of the mobile phone casing 5 to be inspected, and the line scan camera 6 is used to collect the reflection of the stripe light on the surface of the mobile phone casing 5 to be inspected. Based on the visual system of the Keyence XGX+Lumi Trax mirror reflection mode, the light emission will be distorted and missing at small scratches, dents and subtle defects on the surface of the mobile phone casing 5 to be inspected. The line scan camera 6 can more intuitively distinguish the defects on the surface of the mobile phone casing 5 to be inspected through the collected reflected light image, with higher resolution accuracy, and without the need to use a large number of cameras, and lower detection costs.

[0031] The above description of the disclosed embodiments will enable one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be readily apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not limited to the embodiments shown herein but is intended to conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A machine vision-based inspection cabinet, characterized by: The invention comprises a detection cabinet (1), wherein a detection platform (2) is fixedly connected to the middle of the inner cavity of the detection cabinet (1), and a pneumatic support telescopic rod (3) is buried in the center of the detection platform (2), the inner rod of the pneumatic support telescopic rod (3) is fixedly connected upward with a lower supporting negative pressure suction cup (4), and a mobile phone housing (5) to be detected is adsorbed and fixed on the lower supporting negative pressure suction cup (4), and a linear scanning camera (6) and an LED stripe pattern light source (7) are fixedly connected to the top of the inner wall of the detection cabinet (1), respectively, and the linear scanning camera (6) and the LED stripe pattern light source (7) are both arranged toward the mobile phone housing (5) to be detected.

2. The machine vision-based detection cabinet according to claim 1, characterized in that: Another pair of linear scanning cameras (6) and LED stripe pattern light sources (7) are fixedly connected to both sides of the upper end of the detection platform (2), and a surface-changing pneumatic telescopic rod (8) is fixedly connected to the center of the top of the inner wall of the detection cabinet (1), and the inner rod of the surface-changing pneumatic telescopic rod (8) is fixedly connected downward to an upper lifting negative pressure suction cup (9).

3. The machine vision-based detection cabinet according to claim 2, characterized in that: An air source (13) is placed at the bottom of the inner cavity of the detection cabinet (1), and the output end of the air source (13) is connected to the air connection ends of the pneumatic support telescopic rod (3), the lower support negative pressure suction cup (4), the surface-changing pneumatic telescopic rod (8) and the upper lifting negative pressure suction cup (9) respectively through an air path distribution valve and a hose.

4. The machine vision-based detection cabinet according to claim 2, characterized in that: The inner cavity of the detection cabinet (1) corresponds to the bottom of the detection platform (2) and is fixedly connected to a data transfer computer (14), and the signal receiving end and power supply terminal of the data transfer computer (14) are respectively connected to the linear scanning camera (6) and the LED stripe pattern light source (7) through cables.

5. The machine vision-based detection cabinet according to claim 1, characterized in that: A square through hole is provided on the front of the detection cabinet (1) corresponding to the upper end of the detection platform (2), and a cabinet door (10) is fixedly connected to the upper side of the detection cabinet (1) corresponding to the side with the square through hole via a hinge, and an operating handle (12) is fixedly connected to the outer end of the cabinet door (10) away from the hinge.

6. The machine vision-based detection cabinet according to claim 5, characterized in that: A magnetic adhesive strip is fixedly connected to the contact position between the front of the detection cabinet (1) and the back of the cabinet door (10), and the magnetic properties of the magnetic adhesive strips on the detection cabinet (1) and the cabinet door (10) are opposite to each other.

7. The machine vision-based detection cabinet according to claim 5, characterized in that: An observation window is provided at the center of the cabinet door (10), and an observation glass (11) is fixedly connected to the observation window.

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