Light inspection mechanism and light inspection method for detecting foreign matter in large-capacity solution bottles

Abstract

The present invention discloses a light inspection mechanism and a light inspection method for detecting foreign matter in a large-capacity solution bottle, 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 a light source component and a background plate; the light source component is located above the background plate and the bottle body; the light-emitting surface of the light source component faces downward; the front of the background plate faces the bottle body; the image acquisition component includes a camera aimed at the bottle body; the light source component includes at least two light sources, namely a first light source and a second light source; the first light source is located on a side close to the background plate; the second light source is located on a side close to the bottle body; the intensity of the second light source is lower than that of the first light source. While ensuring the detection of foreign matter such as cilia and white spots, this method can effectively eliminate the interference caused by the liquid surface to the detection, and can improve the detection rate of foreign matter inside a large-capacity solution.

Description

Technical Field

[0001] The invention belongs to the technical field of medicine bottle detection equipment, and specifically relates to a light detection mechanism and a light detection method for detecting foreign matter in a large-capacity solution bottle. Background Art

[0002] The detection of foreign matter such as cilia and white spots inside large-volume solutions is a difficult problem for light inspection machines. The reason is that for this type of defect, the light inspection machines currently on the market all use an optical detection solution based on a bottom light source. Under this solution, due to the mirror effect of the liquid surface, the light source will be focused on the liquid surface, and the liquid surface itself is equivalent to a small light source; during the inspection process, due to the large diameter of the bottle, the liquid surface will inevitably shake, which will cause the liquid surface light source to reflect light to any area of ​​the entire bottle body, showing obvious random light interference in the image. When light interference and foreign matter are mixed together, it is difficult to distinguish, which can easily lead to false detection or missed detection. Summary of the invention

[0003] In view of the above problems, the present invention provides a light inspection mechanism and a light inspection method for detecting foreign matter in a large-capacity solution bottle. While ensuring the detection of foreign matter such as cilia and white spots, the present invention can effectively eliminate the interference of the liquid surface on the detection, thereby improving the detection rate of foreign matter inside the large-capacity solution.

[0004] To achieve the above object, the technical solution adopted by the present invention is:

[0005] A light inspection mechanism for detecting foreign matter in a large-capacity solution bottle comprises a bottle body between a light source system and an image acquisition component, wherein the light source system comprises a light source component and a background plate; the light source component is located above the background plate and the bottle body; the light emitting surface of the light source component faces downward; the front of the background plate faces the bottle body; the image acquisition component comprises a camera aimed at the bottle body; the light source component comprises at least two light sources, namely a first light source and a second light source; the first light source is located on a side close to the background plate; the second light source is located on a side close to the bottle body; the intensity of the second light source is lower than that of the first light source.

[0006] Further improvements based on the above technical solutions:

[0007] A light shielding plate is arranged between the second light source and the bottle body.

[0008] The lower end of the shading plate is lower than the liquid level in the bottle.

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

[0010] The front side of the background plate is provided with light absorbing material.

[0011] The camera is a high-speed camera.

[0012] The method for performing light inspection using the light inspection mechanism for detecting foreign matter in a large-capacity solution bottle comprises the following steps:

[0013] Adjust the height of the first light source and the second light source so that the light-emitting surface height of the first light source and the second 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 body and the shading plate;

[0014] Adjust the brightness of the second light source to be lower than that of the first light source; or adjust the height of the second light source to be higher than that of the first light source;

[0015] The first light source and the second light source are controlled to light up alternately. The camera collects images when the second light source is on in the previous frame, and collects images when the first light source is on in the next frame, and the collection is completed in an alternating cycle.

[0016] The beneficial effects of the present invention are:

[0017] 1. The light-emitting surface of the strip light source is lower than the liquid surface and irradiates downward, which can avoid light interference caused by the liquid surface to the detection;

[0018] 2. The design of multi-layer light source + bright and dark imaging ensures that there is no blind spot in solution detection;

[0019] 3. The shading plate in front of the light source is designed so that when the light source is above the liquid level, there is no shielding area between the main detection area and the shading plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 is a schematic diagram of the present invention;

[0021] Figure 2 The first light source imaging diagram of a 250ml large infusion bottle is realized by using the present invention;

[0022] Figure 3 The second light source imaging diagram of a 250ml large infusion bottle is realized by using the present invention.

[0023] In the figure: 1, first light source; 2, background plate; 3, bottle; 4, camera; 5, sunshade; 6, second light source; 7, foreign matter; DETAILED DESCRIPTION

[0024] 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.

[0025] See also Figure 1-3 As shown, in a specific embodiment,

[0026] A light inspection mechanism for detecting foreign matter in a large-capacity solution bottle comprises a bottle body 3 between a light source system and an image acquisition component, wherein the light source system comprises a light source component and a background plate 2; the light source component is located above the background plate 2 and the bottle body 3; the light emitting surface of the light source component faces downward; the front of the background plate 2 faces the bottle body 3; the image acquisition component comprises a camera 4 aimed at the bottle body 3; the light source component comprises at least two light sources, namely a first light source 1 and a second light source 6; the first light source 1 is located on a side close to the background plate 2; the second light source 6 is located on a side close to the bottle body 3; the intensity of the second light source 6 is lower than that of the first light source 1.

[0027] In this embodiment, a bottle body 3 is included between a light source system and an image acquisition component, wherein the light source system includes a light source component and a background plate 2; the light source component is located above the background plate 2 and the bottle body 3; the light emitting surface of the light source component faces downward; the front of the background plate 2 faces the bottle body 3; the image acquisition component includes a camera 4 aimed at the bottle body 3; the light source component includes at least two light sources, namely a first light source 1 and a second light source 6; the first light source 1 is located on a side close to the background plate 2; the second light source 6 is located on a side close to the bottle body 3; the intensity of the second light source 6 is lower than that of the first light source 1; and a light shielding plate 5 is provided between the second light source 6 and the bottle body 3.

[0028] In this embodiment, a bottle body 3 is included between a light source system and an image acquisition component, and the light source system includes a light source component and a background plate 2; the light source component is located above the background plate 2 and the bottle body 3; the light emitting surface of the light source component faces downward; the front of the background plate 2 faces the bottle body 3; the image acquisition component includes a camera 4 aimed at the bottle body 3; the light source component includes at least two light sources, namely a first light source 1 and a second light source 6; the first light source 1 is located on a side close to the background plate 2; the second light source 6 is located on a side close to the bottle body 3; the intensity of the second light source 6 is lower than that of the first light source 1. A light shielding plate 5 is provided between the second light source 6 and the bottle body 3; the lower end of the light shielding plate 5 is lower than the liquid level in the bottle body 3.

[0029] In the present embodiment, a light inspection mechanism for detecting foreign matter in a large-capacity solution bottle includes a bottle body 3 between a light source system and an image acquisition component, wherein the light source system includes a light source component and a background plate 2; the light source component is located above the background plate 2 and the bottle body 3; the light-emitting surface of the light source component faces downward; the front of the background plate 2 faces the bottle body 3; the image acquisition component includes a camera 4 aimed at the bottle body 3; the light source component includes at least two light sources, namely a first light source 1 and a second light source 6; the first light source 1 is located on a side close to the background plate 2; the second light source 6 is located on a side close to the bottle body 3; the intensity of the second light source 6 is lower than that of the first light source 1; the light source component is a bar or arc light source.

[0030] Based on the above embodiment, further optimization is performed as follows:

[0031] The front side of the background plate 2 is provided with light absorbing material.

[0032] The camera 4 is a high-speed camera.

[0033] The method for performing light inspection using the light inspection mechanism for detecting foreign matter in a large-capacity solution bottle as described above comprises the following steps:

[0034] Adjust the height of the first light source 1 and the second light source 6 so that the light-emitting surface height of the first light source 1 and the second light source 6 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] Adjust the brightness of the second light source 6 to be lower than that of the first light source 1; or adjust the height of the second light source 6 to be higher than that of the first light source 1;

[0036] The first light source 1 and the second light source 6 are controlled to light up alternately. The camera collects an image when the second light source 6 is on in the previous frame, and collects an image when the first light source 1 is on in the next frame, and the collection is completed in an alternating cycle.

[0037] The specific working principle of the present invention is:

[0038] This patent invents an optical detection method based on a strip light source. This method can effectively eliminate the interference caused by the liquid surface to the detection while ensuring the detection of foreign matter such as cilia and white spots, and can improve the detection rate of foreign matter inside large-volume solutions.

[0039] The composition of the patented optical system is shown in the figure below. The system consists of a camera, an object to be inspected, and a light source system. The light emitted by the light source system is irradiated onto the object to be inspected; the camera receives the solution image on the back of the object to be inspected; the area inside the solution that contains foreign matter will have image brightness changes.

[0040] The core of this patent is the light source system, which consists of a second light source, a first light source, a shading plate, and a background plate.

[0041] The light-emitting surfaces of the second light source and the first light source face downward, and areas above the light-emitting surfaces are not directly irradiated with light, and the images are darker than other areas; the heights of the light-emitting surfaces of the second light source and the first light source need to be lower than the liquid level of the solution; when the actual layout height of the light source is higher than the liquid level, a sunshade needs to be set in front of the light source to ensure that no light reaches the liquid surface.

[0042] like Figure 2-3As shown, when detecting white or transparent foreign objects, the background plate in the light source system is made of light-absorbing material, and the strip light will be absorbed when it is irradiated on the background plate; there must be no obstruction between the main detection area of ​​the bottle body and the shading plate, otherwise the background will not be completely black, causing interference.

[0043] The volume of a large-capacity solution bottle is large, and it is difficult for the light source system to be universal. This patent sets a second light source and a first light source. The second light source has a weaker light intensity, and mainly detects the area at the bottom of the bottle that is easy to focus light to avoid overexposure; the first light source has a stronger light intensity, and the bottom of the bottle will be overexposed, and mainly detects the bottle body area to avoid insufficient brightness, resulting in unclear contrast of foreign objects such as cilia.

[0044] The camera uses a high-speed camera. After switching the light source channel, the previous frame collects the image when the second light source is on, and the next frame collects the image when the first light source is on. The cycles are alternating in sequence to ensure that there are no blind spots in the detection of the solution bottle to be tested.

[0045] Protection points of this patent:

[0046] 1) This patent is not limited to the detection of foreign matter in large-volume solution bottles. The detection of foreign matter in transparent or translucent solvent bottles of any size, capacity, specification, and shape is also protected by this patent.

[0047] 2) The patent is used for foreign body detection in liquid solutions. The types and industries of detection targets are not restricted. Typical products such as ampoule water injections, oral liquids, glass bottle infusions, plastic bottle infusions, soft bag infusions, plastic row medicines, various water beverages, alcoholic beverages, health drinks, etc. are all protected by this patent.

[0048] 3) The light source of this patent is not limited, and light sources of any shape, wavelength, power, and layout are protected by this patent;

[0049] 4) The light emitting surface of the light source of this patent is not restricted, and the method of partially shielding the light emitting surface to reduce the light intensity in a specific area is protected by this patent;

[0050] 5) The patented light source has the best effect when irradiating downwards. Any light source with an effective luminous surface below the liquid surface and irradiating downwards to avoid interference from the liquid surface is protected by this patent;

[0051] 6) The light source is not limited to a double-layer structure. Any single-layer or multi-layer light source layout, and any layout with the light-emitting surface below the liquid surface are reserved by this patent;

[0052] 7) The material of the background plate is not limited, and any material with light-absorbing properties is protected by this patent;

[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 methods 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 light inspection mechanism for detecting foreign matter in a large-capacity solution bottle, comprising a bottle body (3) between a light source system and an image acquisition component, characterized in that: The light source system comprises a light source assembly and a background plate (2); the light source assembly is located above the background plate (2) and the bottle body (3); the light emitting surface of the light source assembly faces downward; the front surface of the background plate (2) faces the bottle body (3); the image acquisition assembly comprises a camera (4) aimed at the bottle body (3); the light source assembly comprises at least two light sources, namely a first light source (1) and a second light source (6); the first light source (1) is located on a side close to the background plate (2); the second light source (6) is located on a side close to the bottle body (3); the intensity of the second light source (6) is lower than that of the first light source (1); a light shielding plate (5) is provided between the second light source (6) and the bottle body (3); the lower end of the light shielding plate (5) is lower than the liquid level in the bottle body (3).

2. The light inspection mechanism and light inspection method for detecting foreign matter in a large-capacity solution bottle according to claim 1, characterized in that: The light source assembly is a bar-shaped or arc-shaped light source.

3. The light inspection mechanism and light inspection method for detecting foreign matter in a large-capacity solution bottle according to claim 1, characterized in that: The front side of the background plate (2) is provided with a light absorbing material.

4. The light inspection mechanism and light inspection method for detecting foreign matter in a large-capacity solution bottle according to claim 1, characterized in that: The camera (4) is a high-speed camera.

5. A method for performing light inspection using the light inspection mechanism for detecting foreign matter in a large-capacity solution bottle according to any one of claims 1 to 4, characterized in that: The steps include: The height positions of the first light source (1) and the second light source (6) are adjusted so that the light emitting surfaces of the first light source (1) and the second light source (6) are 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; adjusting the brightness of the second light source (6) to be lower than that of the first light source (1); or adjusting the height of the second light source (6) to be higher than that of the first light source (1); The first light source (1) and the second light source (6) are controlled to light up alternately, the camera collects an image when the second light source (6) is on in the previous frame, and collects an image when the first light source (1) is on in the next frame, and the collection is completed in an alternating cycle.

Images