Detection device for industrial endoscope

Abstract

The invention relates to a detection device for an industrial endoscope, which comprises a block body with a plane surface, and a plurality of blind holes with different apertures, a plurality of threaded holes with different apertures, a plurality of bulges with different regular geometrical shapes and a plurality of through holes with different apertures are formed in the plane surface of the block body at intervals; a plurality of protrusions are arranged for each geometrical shape, and the protrusions of the same geometrical shape have different dimensions correspondingly. According to the invention, various mechanisms are integrated, the specification performance of finished industrial endoscopes on a production line can be rapidly and conveniently detected through different mechanisms, and the working efficiency is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of industrial endoscope, in particular to a detection device for industrial endoscope. BACKGROUND

[0002] Industrial endoscope is a commonly used device for nondestructive testing, each component part of which is detected before production to determine whether it meets the requirements, and is detected again after the completion of the production line to determine whether it is a qualified product or not. However, in the prior art, when the finished product is detected again on the production line, different devices are still used to detect different items. For example, whether the pipe diameter of the insertion tube meets the requirements is measured by using a caliper, the imaging resolution is tested by using a resolution test board, and the depth of field needs a special depth of field test device, so different people and different devices are needed to operate, which is complicated and not conducive to the rapid and convenient qualitative detection of the finished product on the production line, and the work efficiency is not high. SUMMARY

[0003] In view of the above problems, the present application provides a detection device for industrial endoscope.

[0004] The technical scheme adopted by the present application to solve the technical problem is: a detection device for industrial endoscope, comprising a block-shaped body with a planar surface, a plurality of blind holes with different hole diameters, a plurality of threaded holes with different hole diameters, a plurality of protrusions with different regular geometric shapes and a plurality of through holes with different hole diameters are arranged on the planar surface of the block-shaped body; the protrusions are provided with a plurality of protrusions for each geometric shape, and the plurality of protrusions of the same geometric shape correspondingly have different size specifications.

[0005] Preferably, the pitch of the threaded hole is 0.1-1.0mm.

[0006] Preferably, the threaded hole is a variable pitch threaded hole, and the pitch gradually decreases from the opening end to the bottom end of the threaded hole.

[0007] Preferably, the protrusions include cube-shaped protrusions, cylindrical protrusions and right triangular prism-shaped protrusions.

[0008] Preferably, the protrusions include a plurality of groups of protrusions arranged in parallel at different intervals, each group of protrusions including a plurality of cuboid-shaped protrusions with the same length and width, and the height of the cuboid-shaped protrusions in different groups of protrusions is different.

[0009] Preferably, the block is a square block, the blind hole is disposed on the front side of the square block, the protrusion is disposed on the front side of the square block, the through hole includes a top through hole disposed on the top surface of the square block and a side through hole disposed on the side surface of the square block, and the diameter of the side through hole is different from the diameter of the top through hole; the threaded hole includes a front threaded hole disposed on the front surface of the square block and a side threaded hole disposed on the side surface of the square block, and the diameter of the front threaded hole is different from the diameter of the side threaded hole.

[0010] Preferably, the blind holes, protrusions, and front threaded holes are arranged at row intervals, and the side through holes and side threaded holes on the side of the square block are arranged at column intervals.

[0011] Preferably, the depth of the blind hole or threaded hole is 10-50 mm.

[0012] Preferably, the bottom of the blind hole is provided with a focus mark.

[0013] Preferably, the block has an extended wall extending above the protrusion at the edge of the surface where the protrusion is provided.

[0014] The beneficial effects of this invention are as follows: This invention integrates multiple mechanisms into one, enabling rapid and convenient qualitative testing of the specifications and performance of finished industrial endoscopes on the production line through different mechanisms. It uses through holes of different diameters to test whether the diameter of the endoscope insertion tube is qualified, uses threaded holes and blind holes to test whether the endoscope imaging effect is qualified, and uses protrusions to test whether the three-dimensional dimensions of the objects in the image detected by the endoscope are accurate. Qualitative testing of multiple specifications and performances is achieved through a single testing device, making the testing convenient and fast and improving work efficiency. Attached Figure Description

[0015] Figure 1 These are schematic diagrams of the front and side views of an embodiment of the present invention; Figure 2 These are structural block diagrams of the back and side sides of an embodiment of the present invention; The component names and serial numbers in the figure are as follows: 1-block body, 10-extension wall, 2-blind hole, 20-focusing mark, 3-threaded hole, 30-front threaded hole, 31-side threaded hole, 4-through hole, 40-top through hole, 41-side through hole, 5-protrusion, 50-cubic protrusion, 51-cylindrical protrusion, 52-regular triangular prism protrusion, 53-protrusion group. Detailed Implementation

[0016] To more clearly illustrate the objectives, technical solutions, and advantages of the embodiments of the present invention, the present invention will be further described below in conjunction with the accompanying drawings and embodiments. It is clear and complete that the described embodiments are only some, not all, of the embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the protection scope of the present invention.

[0017] Examples of embodiments of the present invention Figures 1 to 2As shown, an inspection device for industrial endoscopes includes a block 1 with a planar surface, meaning that at least one side of the block 1 is a planar structure. Preferably, the block is a cube or cuboid square block, which allows for the installation of different mechanisms on each surface of the block 1, making full use of each surface and miniaturizing the inspection device. The block 1 has multiple blind holes 2 of different diameters, multiple threaded holes 3 of different diameters, multiple protrusions 5 with different regular geometric shapes, and multiple through holes 4 of different diameters spaced apart on its planar surface. The blind holes 2 are used to inspect the direct viewing optical effect of the endoscope, the threaded holes 3 are used to inspect the lateral viewing effect of the endoscope, and the through holes 4 are used to inspect whether the insertion tube of the endoscope is compliant. At this point, the diameters of blind hole 2, threaded hole 3, and through hole 4 are set according to the diameter of the insertion tube of different industrial endoscopes. For example, setting their diameters to 1-20mm can meet the inspection requirements of conventional endoscopes. The diameters of commonly used industrial endoscope insertion tubes are 1.2mm, 1.8mm, 2.4mm, 2.8mm, 4mm, 6mm, and 8mm. For through hole 4, during production line inspection, it is only necessary to insert the endoscope insertion tube into through hole 4 to determine whether it is qualified or unqualified. The diameter of through hole 4 is set according to the diameter of the insertion tube and its allowable tolerance. For insertion tubes of the same diameter, two through holes 4 are set. The diameters of the two through holes 4 correspond to the diameter of the insertion tube plus the positive tolerance and the diameter of the insertion tube minus the negative tolerance. For example, if the diameter of the insertion tube is specified as 6±0.1mm, then two through holes 4 with corresponding diameters of 6.1mm and 5.9mm are set. When the insertion tube is inserted into the 6.1mm diameter through-hole 4, it indicates that the insertion tube is too thick and is deemed unqualified. When the insertion tube can be inserted into the 5.9mm diameter through-hole 4, it indicates that the insertion tube is too thin and is also deemed unqualified. This allows for convenient and rapid qualitative testing of the insertion tube specifications on the production line without the need for caliper measurement, greatly improving testing efficiency. As for the blind hole 2, it provides a stable and clean axial testing environment. It guides the line of sight to the bottom of the hole directly in front, and the hole wall effectively isolates stray light from the environment, maintaining stable illumination conditions provided by the endoscope's own light source. At the same time, by using the depth of the blind hole 2 and moving the lens back and forth, the range in which the lens maintains clear focus in the axial direction can be measured. This allows for testing the endoscope's frontal resolution, distortion, color reproduction, and other performance characteristics when the lens is viewed directly in an interference-free environment. The hole wall of the blind hole 2 can also produce light reflection, which helps to detect problems such as glare or ghosting in the optical system under direct viewing conditions.Furthermore, the bottom of the blind hole 2 is equipped with a focus mark 20, such as a crosshair. First, insert a standard, qualified endoscope into the blind hole 2 until the lens is close to the bottom of the hole and focuses on the focus mark 20 until it is sharpest. Simultaneously, pinch the insertion tube at the level of the opening of the blind hole 2 with your fingers. Then, gradually move the endoscope from the fully focused position towards the opening of the blind hole 2, stopping when the image begins to blur. The distance between the previously pinched position and the current position where the insertion tube is level with the opening of the blind hole 2 is called the standard movement distance. Then, measure the actual movement distance of the endoscope to be tested using the aforementioned method. Finally, compare the actual movement distance with the standard movement distance. By comparing distances, if the actual moving distance is less than the standard moving distance, it means that the depth of field of the endoscope does not meet the requirements, thus judging the endoscope's depth of field as unqualified; otherwise, it is qualified. In the test using blind hole 2, it is only necessary for the endoscope's insertion tube to be inserted into blind hole 2. Therefore, the diameter of blind hole 2 is set to the diameter of the insertion tube plus a positive tolerance. This ensures that the endoscope's insertion tube can be inserted and also indirectly tests the diameter of the insertion tube. For threaded hole 3, the threads on the inner wall of threaded hole 3 form a test target, which can be used to evaluate the overall imaging performance of the lens under complex textures and shadows. When the endoscope lens is tilted... When aligned with threaded hole 3, the lens is not parallel to the axis of threaded hole 3. The originally regular thread will exhibit a visual effect of near-large and far-small. The thread closer to the lens will appear sparse and coarse, while the thread farther from the lens will appear dense and fine. The entire thread will present a smooth, continuous, and regular gradient effect from coarse to fine, producing perspective distortion. Observing whether the thread lines bend at this time can test the lens's anti-distortion ability. If irregular distortion occurs, it is judged as unqualified. At the same time, since the thread advances in a spiral, they are at different depths under the tilted view, which can statically and intuitively show the depth range of clear imaging. At this time, it can be specified according to requirements. To determine if a product is qualified, the minimum number of thread turns near and far from the lens must be clearly visible. This can be achieved by observing how many thread turns are clearly visible; those that meet the requirements are qualified, while those that do not are unqualified. Similarly, the diameter of threaded hole 3 should be set to the diameter of the insertion tube plus a positive tolerance to ensure that the endoscope's insertion tube can be inserted. The depth of blind hole 2 and threaded hole 3 is 10-50mm, set according to the endoscope's depth of field requirements. When setting them, their depth should be greater than the endoscope's depth of field requirements. For example, for ordinary industrial endoscopes with medium to short depth of field, their depth can be selected as 20-30mm.For protrusion 5, it has a standard regular geometric shape. By analyzing the monocular visual cues provided by these objects in the image, the endoscopic representation of the object's three-dimensional shape is inferred. Protrusion 5 includes cube-shaped protrusion 50, cylindrical protrusion 51, and regular triangular prism-shaped protrusion 52. That is, the regular geometric shape of protrusion 5 is selected as cube, cylinder, and regular triangular prism. A cylinder in the endoscopic image will present a smooth, continuous highlight band and a region that smoothly transitions to shadow from both sides. If the image looks like a flat rectangle or circle, has an irregular or asymmetrical outline, shows discontinuous highlight breaks, strange patches, or jagged light-dark boundaries, it indicates that the product is unqualified. The parallel lines of a cube are like pens. A straight line, whose eight vertices are all intersections of three edges, appears clear and sharp in the image, presenting it as a three-dimensional entity with defined length, width, and height. If the line is curved, the vertices are blurred, have trailing or abnormal colors, or the image appears flat or lacks a sense of depth, the product is considered unqualified. The edges of a regular triangular prism are used to check edge clarity and edge color difference. Its unique structure, consisting of three rectangular faces and two triangular faces, provides a different line intersection pattern than a cube, used to test the endoscope's handling of different angular relationships. In the image, its edges are clearly distinct, without any color abnormalities, and different faces can be clearly distinguished. If its edges are blurred or adjacent faces are difficult to distinguish, it is considered unqualified. During testing, taking a cube-shaped protrusion 50 as an example, observe the cube-shaped protrusion 50 from different angles and distances. In the image, all edges of the cube-shaped protrusion 50 should be straight lines, with eight clear and sharp vertices, without color fringing or ghosting. This indicates a qualified product. If any of the following issues are present in the image: visible bending of the edges, blurring or diverging of the vertices, purple or green fringing, distortion, obvious shadows at the four corners of the image, or irregular bright or dark spots on the surface, then the product is considered unqualified. Multiple protrusions 5 are provided for each geometric shape, and multiple protrusions 5 of the same geometric shape correspond to different size specifications. That is, the same protrusion 5 has the same shape but different side lengths and heights. This can be used to test whether the endoscope can maintain image consistency at different scales.

[0018] Further improvements include setting the pitch of threaded hole 3 to 0.1-1.0 mm. This allows the pitch to be adjusted based on the minimum resolution required by the endoscope. For example, if the endoscope requires 5 line pairs per millimeter at the center of the lens, the pitch of threaded hole 3 would be 0.2 mm or less. This line pair includes the visible line at the top of the thread and the dark line at the root of the thread. To test the endoscope's performance at different pitches, threaded hole 3 is configured as a variable pitch threaded hole, with the pitch gradually decreasing from the opening to the bottom. This allows for the detection of geometric distortion and contrast in the endoscope image in the coarse pitch region, and the detection of the endoscope's limiting resolution in the fine pitch region. The variable pitch threaded hole can be set in a stepped or continuous gradient manner. For a stepped gradient, the threaded hole 3 is divided into several segments with different pitches from the opening end to the bottom end. The pitch of each segment is the same, and the pitch of the segments from the opening end to the bottom end decreases sequentially. For a continuous gradient, the pitch of the thread continuously decreases from the opening end to the bottom end of the threaded hole 3. In this way, at any working distance and focusing state, a pitch point that is exactly at the lens resolution limit can always be found.

[0019] Further improvements, such as Figure 2 As shown, the protrusion 5 also includes multiple groups of protrusions 53, which are composed of multiple cuboid protrusions of the same length and width arranged at equal intervals. The height of the cuboid protrusions in the different protrusion groups 53 is different. That is, in the multiple protrusion groups 53, the multiple cuboid protrusions in the first protrusion group are arranged at equal intervals with a first type of spacing, the multiple cuboid protrusions in the second protrusion group are arranged at equal intervals with a second type of spacing, and the other protrusion groups are arranged in the same way. At the same time, the length and width of the cuboid protrusions in the multiple protrusion groups 53 are the same, but the height of the cuboid protrusions in the different protrusion groups 53 is different. In this way, it is possible to detect whether the spacing detected by the endoscope in the equally spaced items is accurate.

[0020] Further improvements, such as Figure 1 and Figure 2As shown, block 1 is a square block, such as a cube-shaped square block. Blind hole 2 is located on the front of the square block, protrusion 5 is located on the front of the square block, and through hole 4 includes a top through hole 40 located on the top surface of the square block and a side through hole 41 located on the side surface of the square block, with the diameter of the side through hole 41 being different from that of the top through hole 40; threaded hole 3 includes a front threaded hole 30 located on the front surface of the square block and a side threaded hole 31 located on the side surface of the square block, with the diameter of the front threaded hole 30 being different from that of the side threaded hole 31, facilitating endoscope inspection. At this time, blind hole 2, threaded hole 3, protrusion 5, and through hole 4 are arranged at intervals according to their categories on the surface of block 1. Blind hole 2, protrusion 5, and front threaded hole 30 are arranged at row intervals, and side through hole 41 and side threaded hole 31 on the side surface of the square block are arranged at column intervals, such as... Figure 1 As shown, on the upper front surface of the block 1, multiple blind holes 2 are arranged from left to right according to their aperture size to form the first row structure. Below the first row structure, multiple cube-shaped protrusions 50 are arranged from left to right according to different side lengths to form the second row structure. Below the second row structure, multiple cylindrical protrusions 51 are arranged from left to right according to different diameters to form the third row structure. Below the third row structure, multiple blind holes 2 are arranged from left to right according to their aperture size to form the fourth row structure. The aperture of the blind holes 2 in this row is different from that in the first row structure. Below the fourth row structure, multiple regular triangular prism-shaped protrusions 52 are arranged from left to right according to their side length to form the fifth row structure. Below the fifth row structure, multiple threaded holes 3 are arranged from left to right according to their aperture size to form the fifth row structure. In the structure formed by each protrusion 5, the height of the protrusion 5 increases with the increase of the side length or diameter. Figure 1 and Figure 2 As shown, on the side of the square block away from the front, multiple side through holes 41 are arranged from top to bottom according to their diameter to form the first column structure. On the middle of the side of the square block, multiple side threaded holes 31 are arranged from top to bottom according to their diameter to form the second column structure. The diameter of the side threaded holes 31 is different from that of the front threaded holes 30. On the side of the square block adjacent to the front, multiple side through holes 41 are arranged from top to bottom according to their diameter to form the third column structure. At the same time, the position of the side through holes 41 or side threaded holes 31 on the side of the square block corresponds to the interval between two adjacent rows on the front of the square block, which avoids mutual interference. The top through hole 40 is set in the middle of the top surface of the square block along the direction from the front to the back, which facilitates the setting of blind holes 2 and front threaded holes 30 and avoids the influence of the top through hole 40 on them.

[0021] Further improvements, such as Figure 1 and Figure 2As shown, the block 1 has an extension wall 10 extending above the protrusion 5 at the edge of the surface where the protrusion 5 is provided. This protects the protrusion 5 and prevents it from being touched when the surface where the protrusion 5 is located is placed on the table, thus avoiding dimensional deviations caused by wear and tear on the protrusion 5 during daily use.

[0022] Although the present invention has been described in detail above with general descriptions and specific embodiments, modifications or improvements can be made to it, which will be obvious to those skilled in the art. Therefore, all such modifications or improvements made without departing from the spirit of the present invention fall within the scope of protection claimed by the present invention.

Claims

1. A testing device for industrial endoscopes, characterized in that, The block includes a block having a planar surface, on which multiple blind holes of different diameters, multiple threaded holes of different diameters, multiple protrusions of different regular geometric shapes, and multiple through holes of different diameters are provided at intervals; multiple protrusions are provided for each geometric shape, and multiple protrusions of the same geometric shape correspond to different size specifications.

2. The inspection device for industrial endoscopes according to claim 1, characterized in that, The pitch of the threaded hole is 0.1-1.0 mm.

3. The inspection device for industrial endoscopes according to claim 1 or 2, characterized in that, The threaded hole is a variable pitch threaded hole, and its pitch gradually decreases from the opening end to the bottom end of the threaded hole.

4. The inspection device for industrial endoscopes according to claim 1, characterized in that, The protrusions include cube-shaped protrusions, cylindrical protrusions, and regular triangular prism-shaped protrusions.

5. The inspection device for industrial endoscopes according to claim 1, characterized in that, The protrusion includes multiple groups of protrusions, each consisting of a cuboid protrusion with the same length and width, arranged at equal intervals with different spacings. The heights of the cuboid protrusions in different groups of protrusions are different.

6. The inspection device for industrial endoscopes according to claim 1, characterized in that, The block is a square block. The blind hole is located on the front side of the square block. The protrusion is located on the front side of the square block. The through hole includes a top through hole located on the top surface of the square block and a side through hole located on the side surface of the square block. The diameter of the side through hole is different from that of the top through hole. The threaded hole includes a front threaded hole located on the front surface of the square block and a side threaded hole located on the side surface of the square block. The diameter of the front threaded hole is different from that of the side threaded hole.

7. The inspection device for industrial endoscopes according to claim 6, characterized in that, The blind holes, protrusions, and front threaded holes are arranged at row intervals, while the side through holes and side threaded holes on the side of the square block are arranged at column intervals.

8. The inspection device for industrial endoscopes according to claim 1, characterized in that, The depth of the blind hole and threaded hole is 10-50mm.

9. The inspection device for industrial endoscopes according to claim 1, characterized in that, The bottom of the blind hole is provided with a focus mark.

10. The inspection device for industrial endoscopes according to claim 1, characterized in that, The block has an extended wall extending above the protrusion at the edge of the surface where the protrusion is provided.

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