Off-line product inspection machine

Abstract

The utility model discloses an offline product inspection machine, aims at solving the technical problem of the insufficient stability of the existing offline product inspection machine, large space occupation and hidden danger of safety. The utility model discloses a stage, scanning mechanism, display mechanism, scanning mechanism and display mechanism set up on the stage, and display mechanism sets up at one side of scanning mechanism. The scanning mechanism includes the shroud and the light source, first reflector, second reflector, camera in the shroud, and the camera is horizontally or obliquely downward setting, and the light source is located above the stage, and the camera is located above the one side of light source, and the first reflector is located at the light source one side, and the second reflector is located at the camera one side. The width of the shroud is adapted to the stage, and the height of the shroud is limited to not interfere with the display mechanism. The utility model has the advantages of good stability, space saving and high safety.

Description

Technical Field

[0001] This utility model relates to the field of printed matter inspection technology, specifically to an offline inspection machine. Background Technology

[0002] With the development of visual inspection technology, offline inspection machines, used for first-piece proofing and product sampling, are becoming increasingly common in the printing industry. Currently, offline inspection machines generally employ two operating modes: one involves moving the camera and light source to acquire images, as used in patent CN114173018B; the other involves fixing the camera and light source while the product moves to acquire images, as used in patent CN216635885U. The camera-and-light-source moving mode is compact and occupies little space, but the camera's optical path is vertically designed, and the scanning mechanism has a narrow and tall structure, resulting in poor structural stability for the camera and light source. Furthermore, the moving camera and light source occupy the upper part of the machine, forcing the monitor to be suspended beside it, increasing the machine's space requirement and limiting the use of small monitors. This makes viewing larger images inconvenient, and the camera and light source's housing can easily touch the operator's head during movement, posing a safety hazard. The product-moving mode, on the other hand, requires a suction worktable more than twice the size of the product placement platform, resulting in an excessively long machine, which is unfriendly to printing companies with limited space. Utility Model Content

[0003] This utility model provides an offline inspection machine to solve the technical problems of existing offline inspection machines being unstable, occupying a large space, and posing safety hazards.

[0004] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: Design an offline inspection machine, including a stage, a scanning mechanism, and a display mechanism. The scanning mechanism and the display mechanism are mounted on the stage, and the display mechanism is mounted on one side of the scanning mechanism. The scanning mechanism includes a protective cover and a light source, a first reflector, a second reflector, and a camera located inside the protective cover. The camera is positioned horizontally or obliquely downwards. The light source is located above the stage, and the camera is located above one side of the light source. The first reflector is located on one side of the light source, and the second reflector is located on one side of the camera. The light emitted by the light source illuminates the object to be measured on the stage. The object to be measured reflects the light, and the reflected light passes through the first reflector and the second reflector in sequence before being captured by the camera to obtain a detection image. The width of the protective cover is adapted to the stage, and the height of the protective cover is limited to not interfering with the display mechanism.

[0005] Furthermore, the angle between the incident light path of the camera and the horizontal line is 0-40°. The distance between the object to be measured and the first reflecting mirror is less than or equal to 300mm. The height of the protective cover is less than or equal to 350mm, and the width is 550~750mm.

[0006] Furthermore, the light source is a dome light source or a strip light source, wherein the top of the dome light source has a light channel corresponding to the first reflecting mirror, and the strip light source is obliquely aligned with the object to be measured.

[0007] Furthermore, the light source and camera are translatably positioned above the stage along the width of the stage.

[0008] Compared with the prior art, the beneficial technical effects of this utility model are as follows: This invention utilizes two sets of reflectors to design the optical path system as a flat, wide structure with a smaller height and a larger width. The offline inspection machine employs a moving light source and camera, and the flat, wide structure provides greater stability. Furthermore, its smaller height means it occupies only a small space during lateral movement, allowing for a larger display to be mounted on top, eliminating the need for an externally suspended display and facilitating observation of test results. The movement of the light source and camera does not obstruct the operator's headspace, thus avoiding safety hazards. Attached Figure Description

[0009] Figure 1 This is a schematic diagram of the offline inspection machine of this utility model.

[0010] Figure 2 This is a schematic diagram of the detection optical path in Embodiment 1 of this utility model.

[0011] Figure 3 This is a schematic diagram of the detection optical path in Embodiment 2 of this utility model.

[0012] In the figure, 1 is the stage, 2 is the scanning mechanism, 3 is the display mechanism, 100 is the dome light source, 100' is the strip light source, 201 is the first reflector, 202 is the second reflector, 300 is the camera, 400 is the protective cover, a is the distance from the detection surface to the first reflector in the detection light path, angle P is the angle between the incident light path of the camera and the horizontal line, b is the height dimension of the protective cover, and c is the width dimension of the protective cover. Detailed Implementation

[0013] The specific embodiments of this utility model will be described below with reference to the accompanying drawings and examples. However, the following examples are only used to illustrate this utility model in detail and do not limit the scope of this utility model in any way.

[0014] Example 1: An offline inspection machine, see Figure 1The system includes a stage 1, a scanning mechanism 2, and a display mechanism 3. The scanning mechanism 2 and the display mechanism 3 are disposed on the upper surface of the stage 1, with the display mechanism 3 located on one side of the scanning mechanism 2. The display mechanism 3 is a liquid crystal display screen connected above the stage 1. The stage 1 is used to hold the paper to be scanned.

[0015] See the structure of scanning mechanism 2. Figure 2 The system includes a protective cover 400 and a light source 100, a first reflector 201, a second reflector 202, and a camera 300 located inside the protective cover 400. The camera 300 is positioned diagonally downwards. The light source 100 is located above the stage 1, and the camera 300 is located above and to the left of the light source 100. The first reflector 201 is located above and to one side of the light source 100, and the second reflector 202 is located below and to one side of the camera. The light emitted by the light source 100 illuminates the paper to be tested on the stage 1. The paper to be tested reflects the light, and the reflected light passes through the first reflector 201 and the second reflector 202 in sequence before being captured by the camera 300 to obtain a detection image.

[0016] In this embodiment, the width of the protective cover 400 is adapted to the stage 1, and the height of the protective cover 400 is limited to not interfering with the display mechanism 3. Specifically, the angle P between the incident light path of the camera 300 and the horizontal line is 0-40°, the distance between the paper to be tested and the first reflecting mirror 201 is less than or equal to 300mm, the height a of the protective cover 400 is ≤350mm, and the width c is 550~750mm.

[0017] In this embodiment, the light source 100 is a dome light source. The top of the dome light source has a light channel corresponding to the first reflector 201. The light reflected by the paper to be tested is emitted from the light channel, and after passing through the first and second reflectors, it is captured by the camera 300 to generate a detection image.

[0018] This embodiment uses a moving light source and camera, which are positioned above the stage and can be moved horizontally from left to right along the length of the stage. This can be achieved using a motorized guide rail or similar means.

[0019] Example 2: The difference from Example 1 is that the light source 100' adopts a strip light source. The two symmetrical strip light sources on the left and right sides shine obliquely on the paper to be tested. The light reflected by the paper to be tested is captured by the camera 300 after passing through the first and second reflectors to generate a detection image.

[0020] The aforementioned offline inspection machine designs the optical path system as a flat and wide structure with a small height and a large width. The offline inspection machine uses a light source and camera movement method, and the flat and wide structure is more stable. The small height means that it occupies only a small space when moving laterally, and its stability is strong. A large display can still be set above the scanning mechanism 2 for easy observation of the inspection results.

[0021] The present invention has been described in detail above with reference to the accompanying drawings and embodiments. However, those skilled in the art will understand that, without departing from the spirit of the present invention, various specific parameters in the above embodiments can be changed to form multiple specific embodiments, all of which are common variations of the present invention, and will not be described in detail here.

Claims

1. An offline inspection machine, characterized in that: The system includes a stage, a scanning mechanism, and a display mechanism. The scanning mechanism and the display mechanism are mounted on the stage, with the display mechanism positioned to one side of the scanning mechanism. The scanning mechanism includes a protective cover and a light source, a first reflector, a second reflector, and a camera located inside the protective cover. The camera is positioned horizontally or obliquely downwards. The light source is located above the stage, and the camera is located above and to one side of the light source. The first reflector is located on the side of the light source, and the second reflector is located on the side of the camera. Light emitted from the light source illuminates the object to be measured on the stage. The object reflects the light, and the reflected light passes sequentially through the first reflector and the second reflector before being captured by the camera to obtain a detection image. The width of the protective cover is adapted to the stage, and the height of the protective cover is limited to avoid interfering with the display mechanism.

2. The offline inspection machine according to claim 1, characterized in that: The angle between the incident light path of the camera and the horizontal line is 0-40°.

3. The offline inspection machine according to claim 1, characterized in that: The distance between the object to be tested and the first reflecting mirror is less than or equal to 300 mm.

4. The offline inspection machine according to claim 1, characterized in that: The height of the protective cover is less than or equal to 350mm, and the width is 550~750mm.

5. The offline inspection machine according to claim 1, characterized in that: The light source is either a dome light source or a strip light source. The dome light source has a light channel at the top corresponding to the first reflecting mirror, while the strip light source is obliquely aligned with the object to be measured.

6. The offline inspection machine according to claim 1, characterized in that: The light source and camera are positioned above the stage and can be moved laterally along the length of the stage.

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