Foreign body light inspection mechanism and light inspection method based on combined light source

Abstract

The present invention discloses a foreign body light inspection mechanism and light inspection method based on a combined light source, which belongs to the technical field of medicine bottle detection equipment, and includes a bottle body between a light source system and an image acquisition component, wherein the light source system includes an upper light source and a backlight source; the upper light source is located above the backlight source and the bottle body; the light-emitting surface of the upper light source faces downward; the light-emitting surface of the backlight source faces the bottle body; the image acquisition component includes a camera aimed at the bottle body; and a light-absorbing plate is arranged in front of the backlight source. While ensuring the detection of foreign bodies such as cilia and white spots, the present invention can effectively eliminate the interference caused by the liquid surface to the detection, and can improve the detection rate of foreign bodies inside large-volume solutions. The method achieves full coverage of different types of defect detection on a single station, and can improve the detection rate of foreign bodies inside the solvent.

Description

Technical Field

[0001] The present invention belongs to the technical field of medicine bottle detection equipment, and specifically relates to a foreign body light detection mechanism and a light detection method based on a combined light source. Background Art

[0002] Light inspection machines are used to detect visible foreign matter inside solvents produced by pharmaceutical factories. To ensure the detection effect of solvents, a light inspection machine is usually equipped with multiple inspection stations, each of which detects defects or foreign matter in different locations or categories. In practical applications, backlighting is more effective in detecting colored foreign matter, while strip light is more effective in detecting white or translucent foreign matter.

[0003] To ensure the inspection effect, the general method is to set up multiple different inspection stations, each station using different lighting methods. If each station can be equipped with multiple sets of light source systems and collect solvent images under multiple sets of different light sources, the inspection effect of the light inspection machine will be greatly improved. Summary of the invention

[0004] In view of the above problems, the present invention provides a foreign matter light inspection mechanism and a light inspection method based on a combined light source. The method achieves full coverage of different types of defect detection at a single station and can improve the detection rate of foreign matter inside the solvent.

[0005] To achieve the above object, the technical solution adopted by the present invention is:

[0006] A foreign body light inspection mechanism based on a combined light source comprises a bottle body between a light source system and an image acquisition component, wherein the light source system comprises an upper light source and a backlight source; the upper light source is located above the backlight source and the bottle body; the light emitting surface of the upper light source faces downward; the light emitting surface of the backlight source faces the bottle body; the image acquisition component comprises a camera aimed at the bottle body; and a light absorbing plate is arranged in front of the backlight source.

[0007] As a further improvement of the above technical solution:

[0008] The light emitting surface height of the upper light source is lower than the liquid level height of the bottle body; or a light shielding plate is arranged between the upper light source and the bottle body, and the lower end of the light shielding plate is lower than the liquid level height of the bottle body.

[0009] The upper light source is a bar-shaped or arc-shaped light source.

[0010] The light absorbing plate is dark in color.

[0011] The light absorbing plate is a semi-transparent plate.

[0012] The method for performing light inspection using the foreign body light inspection mechanism based on the combined light source comprises the following steps:

[0013] Adjust the height of the upper light source so that the light-emitting surface of the upper light source is lower than the liquid level of the solution; or add a shading plate and adjust the height of the shading plate so that no light is irradiated to the liquid level of the solution, while ensuring that there is no obstruction between the detection area of ​​the bottle and the shading plate;

[0014] When detecting white or translucent foreign objects, turn on the upper light source and turn off the backlight source, so that the scattered light of the upper light source is absorbed by the light-absorbing plate, forming a black background in the bottle body, highlighting the white and translucent foreign objects, and the camera collects images;

[0015] When detecting colored foreign matter, turn off the upper light source and turn on the backlight source, so that the light emitted by the backlight source penetrates the light absorbing plate and irradiates the bottle body, forming a backlight effect inside the bottle body, highlighting the colored foreign matter, and the camera collects the image;

[0016] The upper light source and the backlight source are controlled to light up alternately. The camera collects the image when the upper light source is on in the previous frame, and collects the image when the backlight source is on in the next frame, and the collection is completed in an alternating cycle.

[0017] The beneficial effects of the present invention are:

[0018] 1. The lower backlight source and upper light source of a single station are imaged and detected once respectively, achieving full coverage of detection of different types of foreign objects;

[0019] 2. The single-station integrated upper light source and backlight detection can reduce the number of detection stations while ensuring the detection effect, simplify the mechanical structure and reduce costs;

[0020] 3. The backlight source and upper light source at a single workstation are imaged and detected once respectively. Under limited workstations, the number of detections can be increased, which can improve the detection rate of foreign matter. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 is a schematic diagram of the present invention;

[0022] Figure 2 To realize the imaging of a 10ml oral liquid bottle under backlight by using the present invention;

[0023] Figure 3 The present invention is used to realize the light source imaging on a 10ml oral liquid bottle.

[0024] In the figure: 1. Upper light source; 2. Backlight source; 3. Bottle body; 4. Camera; 5. Sunshade; 6. Light absorbing plate; 7. Foreign matter. DETAILED DESCRIPTION

[0025] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention is described in detail below in conjunction with the accompanying drawings. The description in this part is only exemplary and explanatory and should not have any limiting effect on the protection scope of the present invention.

[0026] See also Figure 1 As shown, in a specific embodiment, a foreign body light inspection mechanism based on a combined light source includes a bottle body 3 located between a light source system and an image acquisition component, wherein the light source system includes an upper light source 1 and a backlight source 2; the upper light source 1 is located above the backlight source 2 and the bottle body 3; the light-emitting surface of the upper light source 1 faces downward; the light-emitting surface of the backlight source 2 faces the bottle body 3; the image acquisition component includes a camera 4 aimed at the bottle body 3; and a light-absorbing plate 6 is arranged in front of the backlight source 2.

[0027] In this embodiment, a foreign body light inspection mechanism based on a combined light source includes a bottle body 3 located between a light source system and an image acquisition component, wherein the light source system includes an upper light source 1 and a backlight source 2; the upper light source 1 is located above the backlight source 2 and the bottle body 3; the light-emitting surface of the upper light source 1 faces downward; the light-emitting surface of the backlight source 2 faces the bottle body 3; the image acquisition component includes a camera 4 aimed at the bottle body 3; a light-absorbing plate 6 is provided in front of the backlight source 2; the light-emitting surface height of the upper light source 1 is lower than the liquid level height of the bottle body 3.

[0028] In the present embodiment, a foreign body light inspection mechanism based on a combined light source includes a bottle body 3 located between a light source system and an image acquisition component, wherein the light source system includes an upper light source 1 and a backlight source 2; the upper light source 1 is located above the backlight source 2 and the bottle body 3; the light-emitting surface of the upper light source 1 faces downward; the light-emitting surface of the backlight source 2 faces the bottle body 3; the image acquisition component includes a camera 4 aimed at the bottle body 3; a light-absorbing plate 6 is arranged in front of the backlight source 2; a light-shielding plate 5 is arranged between the upper light source 1 and the bottle body 3, and the lower end of the light-shielding plate 5 is lower than the liquid level in the bottle body 3.

[0029] The above embodiment is further optimized as follows:

[0030] The upper light source 1 is a bar-shaped or arc-shaped light source.

[0031] The light absorbing plate 6 is dark in color.

[0032] The light absorbing plate 6 is a semi-transparent plate.

[0033] The method for performing light inspection using the foreign body light inspection mechanism based on the combined light source comprises the following steps:

[0034] Adjust the height of the upper light source 1 so that the light-emitting surface of the upper light source 1 is lower than the liquid level of the solution; or add a shading plate 5 and adjust the height of the shading plate 5 so that no light is irradiated to the liquid level of the solution, while ensuring that there is no obstruction between the detection area of ​​the bottle body and the shading plate;

[0035] When detecting white or translucent foreign matter, the upper light source 1 is turned on and the backlight source 2 is turned off, so that the scattered light of the upper light source 1 is absorbed by the light absorbing plate 6, forming a black background in the bottle body 3, highlighting the white and translucent foreign matter, and the camera 4 collects the image;

[0036] When detecting colored foreign matter, the upper light source 1 is turned off and the backlight source 2 is turned on, so that the light emitted by the backlight source 2 penetrates the light absorbing plate 6 and irradiates the bottle body 3, forming a backlight effect inside the bottle body 3, highlighting the colored foreign matter, and the camera 4 collects images;

[0037] The upper light source 1 and the backlight source 2 are controlled to light up alternately, the camera 4 collects the image when the upper light source 1 is on in the previous frame, and collects the image when the backlight source 2 is on in the next frame, and the collection is completed in an alternating cycle.

[0038] The specific working principle of the present invention is:

[0039] A combined foreign body detection method based on a strip light source and a backlight source at a single station; when the strip light source, i.e., an upper light source 1, is on, white or translucent foreign bodies are detected; when the backlight source 2 is on, colored foreign bodies are detected.

[0040] This method achieves full coverage of different types of defect detection at a single station, which can improve the detection rate of foreign matter inside the solvent.

[0041] The optical system of the present invention is composed of Figure 1 As shown, the system consists of a camera 4, a bottle body 3, and a light source system. The light source system includes an upper light source 1, a backlight source 2, a light shielding plate 5, and a light absorbing plate 6; the light emitted by the light source system is irradiated onto the bottle body; the camera receives the solvent image at the back of the bottle body; the area inside the solvent containing foreign matter will have image brightness changes.

[0042] The core of the present invention is the light source system, which is composed of a backlight source 2, an upper light source 1, a light shielding plate 5, and 6 light absorbing plates.

[0043] The light-emitting surface of the upper light source 1 is downward, and the area above the light-emitting surface is not directly illuminated by light, and the image is darker than other areas; the light-emitting surface height of the upper light source 1 needs to be lower than the liquid level of the solvent bottle. The backlight source 2 penetrates through the solvent bottle, and the colored foreign matter inside the solvent bottle will block part of the light source, and the camera image will be darker than other areas.

[0044] like Figure 3 As shown, a translucent dark light-absorbing plate is arranged in front of the backlight source 2. When the upper light source is bright, the residual light shines on the light-absorbing plate. The light source intensity is weak, and most of it will be absorbed by the light-absorbing plate under the black background; at the same time, the irradiation direction of the light is downward, and after the residual light is reflected again by the light-absorbing plate, the light irradiated on the bottle body can be ignored. At this time, white or translucent foreign objects can be detected.

[0045] like Figure 2As shown, when the backlight is on, since the backlight uses a high-brightness light source, the backlight has spare power after penetrating the light-absorbing plate and can continue to penetrate the bottle body. At this time, colored foreign matter can be detected.

[0046] The camera uses a high-speed camera. After switching the light source channel, the previous frame collects the image when the bar light is on, and the next frame collects the image when the backlight is on, and they cycle alternately in sequence.

[0047] The protection points of the present invention are:

[0048] The present invention is not limited to liquid medicines, and the types and industries of the detection targets are not restricted. Typical products such as ampoule water injections, oral liquids, glass large infusions, plastic bottle large infusions, soft bag large infusions, row medicines, various water beverages, alcoholic beverages, health drinks, etc. are all protected by the present invention.

[0049] The light absorbing plate of the present invention is not limited by materials or categories, and any translucent colored material is protected by the present invention;

[0050] The light source of the present invention has the best effect of irradiating downwards. Any light source with an effective luminous surface below the liquid surface and irradiating downwards to avoid the interference of the liquid surface is protected by the present invention.

[0051] Any combination of backlight and strip light, and the solution of achieving a white background for the image under backlight and a black background for the image under strip light by using a colored light-absorbing plate, are all protected by the present invention.

[0052] The backlight and strip light of the present invention are not limited by material, shape, power, wavelength, shielding, etc.

[0053] It should be noted that, in this article, the terms "comprises", "includes" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or apparatus that includes a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or apparatus.

[0054] This article uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only used to help understand the method and core ideas of the present invention. The above is only a preferred implementation of the present invention. It should be pointed out that due to the limitations of textual expression and the objective existence of infinite specific structures, ordinary technicians in this technical field can make several improvements, modifications or changes without departing from the principles of the present invention, and can also combine the above technical features in an appropriate manner; these improvements, modifications, changes or combinations, or the direct application of the inventive concept and technical solution to other occasions without improvement, should be regarded as the protection scope of the present invention.

Claims

1. A foreign body light inspection mechanism based on a combined light source, comprising a bottle body (3) between a light source system and an image acquisition component, characterized in that: The light source system comprises an upper light source (1) and a backlight source (2); the upper light source (1) is located above the backlight source (2) and the bottle body (3); the light-emitting surface of the upper light source (1) faces downward; the light-emitting surface of the backlight source (2) faces the bottle body (3); the image acquisition component comprises a camera (4) aimed at the bottle body (3); a translucent dark light-absorbing plate (6) is arranged in front of the backlight source (2); The light-emitting surface height of the upper light source (1) is lower than the liquid level height of the bottle body (3); or a light shielding plate (5) is provided between the upper light source (1) and the bottle body (3), and the lower end of the light shielding plate (5) is lower than the liquid level height in the bottle body (3).

2. The foreign body light inspection mechanism based on the combined light source according to claim 1 is characterized in that: The upper light source (1) is a strip-shaped or arc-shaped light source.

3. A method for performing light inspection using the foreign body light inspection mechanism based on a combined light source as described in any one of claims 1 to 2, characterized in that: The steps include: The height position of the upper light source (1) is adjusted so that the light emitting surface of the upper light source (1) is lower than the liquid level of the solution; or a light shielding plate (5) is added and the height position of the light shielding plate (5) is adjusted so that no light is irradiated to the liquid level of the solution, while ensuring that there is no obstruction between the detection area of ​​the bottle body and the light shielding plate; When detecting white or translucent foreign matter, the upper light source (1) is turned on and the backlight source (2) is turned off, so that the scattered light of the upper light source (1) is absorbed by the light absorbing plate (6), forming a black background in the bottle body (3), highlighting the white and translucent foreign matter, and the camera (4) collects images; When detecting colored foreign matter, the upper light source (1) is turned off and the backlight source (2) is turned on, so that the light emitted by the backlight source (2) penetrates the light absorbing plate (6) and then irradiates the bottle body (3), thereby forming a backlight effect inside the bottle body (3) and highlighting the colored foreign matter, and the camera (4) collects an image; The upper light source (1) and the backlight source (2) are controlled to light up alternately, and the camera (4) collects an image when the upper light source (1) is on in the previous frame, and collects an image when the backlight source (2) is on in the next frame, and the collection is completed in an alternating cycle.

Images