Calibration plate for calibrating crack width

Abstract

The utility model relates to the field of image auxiliary measuring tools, and discloses a calibration plate for calibrating crack width, which comprises a plate body, an anti-reflection coating and a fixing part, the plate body comprises an upper surface and a lower surface, and the upper surface and the lower surface are both smooth planes; the anti-reflection coating is arranged on the upper surface; the fixing part is arranged on the lower surface and is used for being fixed in a crack area; wherein a plurality of notch grooves are formed in the upper surface at intervals, and the widths of the notch grooves are different from one another. According to the utility model, the appropriate notch groove is selected to be aligned with the crack, the imaging equipment is used to shoot the image containing the plate body and the crack, the reflection error of the imaging picture is avoided through the anti-reflection layer, and finally the real physical width is converted through calculation, so that the measurement accuracy of the crack width is improved, and the crack width can be conveniently calibrated by the device.

Description

Technical Field

[0001] This utility model relates to the field of image-assisted measurement tools, and in particular to a calibration plate for calibrating crack width. Background Technology

[0002] Image-based measurement methods are commonly used in crack width detection. However, existing image-based measurement methods often suffer from significant errors in crack width determination due to the lack of a reference scale. Furthermore, due to factors such as ambient lighting and shooting angle, the images of the crack area often exhibit distortion or lack scale calibration information, making it impossible to accurately measure crack width and difficult to conveniently calibrate it.

[0003] Therefore, existing technologies still need to be improved and developed. Utility Model Content

[0004] The technical problem to be solved by this utility model is to provide a calibration plate for calibrating crack width, which addresses the above-mentioned defects of the prior art. The aim is to solve the problem that the existing technology of measuring crack width by direct photography is easily affected by ambient light and shooting angle, making it difficult to conveniently calibrate crack width.

[0005] The technical solution adopted by this utility model to solve the technical problem is as follows:

[0006] A calibration plate for calibrating crack width, comprising:

[0007] The plate includes an upper surface and a lower surface, both of which are smooth planes;

[0008] An anti-reflective coating is applied to the upper surface;

[0009] A fixing part is provided on the lower surface for fixing in the crack area;

[0010] The upper surface is provided with a number of grooves at intervals, and the width of each groove is different.

[0011] The calibration plate used to calibrate the crack width, wherein the width of all the grooves includes any combination of 1mm, 3mm, 5mm, 10mm, 20mm, 30mm and 50mm.

[0012] The calibration plate used to calibrate the crack width, wherein the cross-sectional shape of the groove is square.

[0013] The calibration plate used to calibrate the crack width, wherein the number of grooves is set to six.

[0014] The calibration plate used to calibrate the crack width includes an anti-reflective coating comprising any one of magnesium oxide anti-reflective coating, titanium oxide anti-reflective coating, silicon oxide anti-reflective coating, aluminum oxide anti-reflective coating, organic polymer anti-reflective coating, and silicon dioxide nanoparticle anti-reflective coating.

[0015] The calibration plate used to calibrate the crack width, wherein the fixing part is an adhesive or a magnetic attachment.

[0016] The calibration plate for calibrating crack width, wherein the fixing part is configured as a magnetic suction element, and the side of the magnetic suction element away from the plate body is a plane, an arc-shaped surface or an inclined surface.

[0017] The calibration plate used to calibrate the crack width, wherein the plate body is an aluminum alloy plate body or a composite plate body.

[0018] The calibration plate used to calibrate the crack width has a length of 50-100mm, a width of 150-200mm, and a height of 5-20mm.

[0019] Beneficial effects:

[0020] This invention provides a calibration plate for calibrating crack width. When measuring crack width, a suitable groove is selected and aligned with the crack to ensure that the groove area is parallel to the crack. The calibration plate is then fixed to the crack area to be measured using a fixing part. An imaging device (camera or drone) is then used to capture an image containing the plate and the crack. Due to the anti-reflective layer, the image will not have reflection errors. Finally, the relationship between the groove of the calibration plate and the corresponding pixel width is calibrated and converted into the true physical width through calculation, thereby improving the accuracy of crack width measurement. This device can conveniently calibrate crack width. Attached Figure Description

[0021] Figure 1 This is a structural diagram of the calibration plate of this utility model;

[0022] Figure 2 This is a structural diagram of the first embodiment of the calibration plate of this utility model;

[0023] Figure 3 This is a structural diagram of the second embodiment of the calibration plate of this utility model;

[0024] Figure 4 This is a structural diagram of the third embodiment of the calibration plate of this utility model.

[0025] In the picture:

[0026] 1. Plate body; 1-1. Groove; 2. Anti-reflective coating; 3. Fixing part. Detailed Implementation

[0027] The embodiments of this application are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this application, and should not be construed as limiting this application.

[0028] In the description of this application, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are used only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on this application. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, unless otherwise stated, "a plurality of" means two or more.

[0029] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0030] See Figures 1 to 2 As shown, this application provides a calibration plate for calibrating crack width, including a plate body 1, an anti-reflective coating 2, and a fixing part 3. The plate body 1 includes an upper surface and a lower surface, both of which are smooth planes. The anti-reflective coating 2 is disposed on the upper surface. The fixing part 3 is disposed on the lower surface for fixing to the crack area. A plurality of grooves 1-1 are provided at intervals on the upper surface, and the width of each groove 1-1 is different.

[0031] Specifically, the upper and lower surfaces of the plate 1 are both smooth planes. The upper surface is used to set the anti-reflective coating 2. The anti-reflective coating 2 refers to the upper surface that has undergone special processing to reduce the light reflectivity of the surface. When the camera on the drone captures an image of the upper surface of the plate 1 containing the corresponding groove 1-1 and crack width, it reduces the reflection error generated when the imaging device (drone camera) captures the upper surface of the plate 1, thereby improving the measurement accuracy. The anti-reflective coating 2 can be processed onto the upper surface of the plate 1 through processes such as chemical etching, spraying, and dip coating.

[0032] This embodiment discloses that the upper surface of the plate 1 is provided with a plurality of grooves 1-1. The number of grooves 1-1 can be designed by the user according to common crack widths, such as 2, 3, 4, 5 and 6, etc. The width of each groove 1-1 is different so that the plate 1 can measure the width of various types of cracks. The depth of the grooves 1-1 can be designed according to the height of the plate 1. It is worth noting that the depth of the grooves 1-1 cannot penetrate the plate 1 to avoid affecting the stability of the plate 1. The lower surface of the plate 1 is provided with a fixing part 3, which is used to fix the plate 1 in the crack area. The fixing part 3 can be configured with a corresponding structure and shape according to actual needs.

[0033] It should be noted that the side of plate 1 can be set as a vertical plane, making plate 1 a cuboid shape, or it can be set as other shapes, such as a triangular cross-section, as shown below. Figure 1 As shown, the cross-sectional shape of the side of the plate 1 is a convex triangle, and the hypotenuse of the triangle fits into the side wall and forms a symmetrical arrangement, making the plate 1 more aesthetically pleasing.

[0034] When measuring crack width, plate 1 is placed at the lower end of the crack area to be measured. A suitable groove 1-1 is selected and aligned with the crack, ensuring that the groove 1-1 area is parallel or nearly parallel to the crack. An imaging device (such as a camera or drone) is used to capture an image containing the calibration plate and the crack. Then, by measuring the crack width and calculating the relationship between the known width of the groove 1-1 on the calibration plate and its corresponding pixel width in the image, a scaling factor of pixel unit length to actual physical width is calculated. Subsequently, the pixel width of the crack is measured in the same image, and this scaling factor is used to convert it to the true physical width. The specific formula is as follows:

[0035]

[0036] Breal: The actual physical width (in millimeters) of the known groove 1-1 on the calibration plate;

[0037] Bpiexl: The pixel width (in pixels) of the known groove 1-1 on the calibration plate in the image;

[0038] Rcal: A scaling factor between pixel width and actual width (unit: mm / pixel);

[0039] Cpixel: The pixel width of the crack in the image (unit: pixels);

[0040] Creal: The actual physical width of the crack (unit: millimeters).

[0041] See Figures 1 to 2 As shown, in another embodiment of this application, the width of all the grooves 1-1 includes any combination of 1mm, 3mm, 5mm, 10mm, 20mm, 30mm and 50mm.

[0042] Specifically, there are several grooves 1-1. The width of the grooves 1-1 can be designed according to the conventional crack width. The width of each groove 1-1 is different. The width can be selected as any combination of 1mm, 3mm, 5mm, 10mm, 20mm, 30mm and 50mm. For example, 1mm and 3mm can be used to match two different crack widths, 1mm, 3mm and 5mm can be used to match three different crack widths, and 1mm, 3mm, 5mm and 10mm can be used to match four different crack widths, etc. When the number of grooves is set is different, the number of crack widths that can be matched is also different, so that the grooves 1-1 can match multiple crack widths.

[0043] See Figures 1 to 2 As shown, in another embodiment of this application, the number of grooves 1-1 is six.

[0044] Specifically, this application preferably uses six grooves 1-1 to match six different crack width regions. The widths of the grooves 1-1 are set to 1mm, 3mm, 5mm, 10mm, 20mm, and 30mm, each representing a common crack width, thus improving the applicability of the calibration plate. In some embodiments, the surface position of each groove 1-1 can also be marked with a corresponding scale, allowing users to directly view the width of the groove 1-1, improving convenience.

[0045] See Figure 2 As shown, in another embodiment of this application, the cross-sectional shape of the groove 1-1 is square.

[0046] Specifically, the cross-sectional shape of the groove 1-1 is square, that is, both side walls of the groove 1-1 are vertical planes, and the top and bottom walls are horizontal planes. Furthermore, the bottom wall of the groove 1-1 is arranged parallel to the bottom wall of the plate 1. When the plate 1 is placed directly on the crack, it can be directly viewed by the user, and the measurement is less prone to errors.

[0047] In another embodiment of this application, the anti-reflective coating 2 includes any one of magnesium oxide anti-reflective coating, titanium oxide anti-reflective coating, silicon oxide anti-reflective coating, aluminum oxide anti-reflective coating, organic polymer anti-reflective coating, and silicon dioxide nanoparticle anti-reflective coating.

[0048] Specifically, the anti-reflective coating 2 includes any one of magnesium oxide anti-reflective coating, titanium oxide anti-reflective coating, silicon oxide anti-reflective coating, aluminum oxide anti-reflective coating, organic polymer anti-reflective coating, and silicon dioxide nanoparticle anti-reflective coating. In this embodiment, the anti-reflective coating 2 is preferably magnesium oxide anti-reflective coating 2. Magnesium oxide anti-reflective coating is a common inorganic compound that is prepared by physical vapor deposition (PVD) technology. It has the advantages of low manufacturing cost and easy processing, which further reduces the cost of this device.

[0049] See Figures 1 to 2 As shown, in another embodiment of this application, the fixing part 3 is an adhesive or a magnetic component.

[0050] Specifically, the fixing part 3 is an adhesive tape, which is placed on the lower surface of the plate 1 and used to stick to the crack area. The adhesive tape uses "removable adhesive" and "low-tack adhesive", such as double-sided tape. One side is stuck to the lower surface of the plate 1 and the other side is used to stick to the crack area. When the adhesive tape is not sticky enough, the double-sided tape can be reused to stick it to the lower surface of the plate 1, which facilitates the reuse of the device.

[0051] In another embodiment, the fixing part 3 can also be a magnetic attractor, which refers to a magnet. The shape of the magnet can be set according to actual needs, such as a cuboid or a cylinder, and is suitable for magnetic crack areas. Whether it is a cuboid or a cylinder, the bottom wall of the magnet can fit into the flat crack area, so that the plate 1 can be stably fixed in the crack area, reducing calibration errors. In this solution, by setting the fixing part 3 as an adhesive or magnetic attractor, the crack area applicable to the fixing part 3 is expanded.

[0052] See Figures 2 to 4 As shown, in another embodiment of this application, the fixing part 3 is configured as a magnetic suction member, and the side of the magnetic suction member away from the plate 1 is a plane, an arc-shaped surface or an inclined surface.

[0053] Specifically, the fixing part 3 is a magnetic element, i.e., a magnet. The magnet can adhere to the magnetic crack area, making it easy to fix the device within the crack area. The magnet is rectangular in shape, suitable for flat crack surfaces. Of course, the magnet can also be made in various shapes, as long as the bottom wall of the magnet is flat. In addition, since the surface of the crack area may be curved, flat, or inclined, the bottom wall shape of the magnet can be set to three styles—curved, flat, or inclined—to adapt to different types of crack areas and improve its applicability.

[0054] In another embodiment of this application, the plate 1 is an aluminum alloy plate.

[0055] Specifically, the aluminum alloy plate 1 refers to a plate made of aluminum alloy, which has the advantages of high strength, corrosion resistance, lightweight, and easy processing. Using an aluminum alloy plate 1 can also effectively reduce equipment costs and extend the service life of the equipment. The composite plate refers to a plate 1 made of composite materials, such as carbon fiber reinforced plastic, which has excellent mechanical properties and chemical stability, is lightweight, and corrosion resistant. In this embodiment, the plate 1 is preferably an aluminum alloy plate, which makes the plate 1 have a longer service life, is easy to process, and has low cost.

[0056] In another embodiment of this application, the length of the plate 1 is 50-100mm, the width is 150-200mm, and the height is 5-20mm.

[0057] Specifically, the length of the plate 1 is 50-100mm, the width is 150-200mm, and the height is 5-20mm. The preferred length of the plate 1 is 50mm, the width is 159mm, and the height is 10mm. The corresponding groove 1-1 has a depth of 5mm. By limiting the size of the plate 1, the device is made small and easy to carry and use.

[0058] In summary, this utility model provides a calibration plate for calibrating crack width. When measuring crack width, a suitable groove is selected and aligned with the crack to ensure that the groove area is parallel to the crack. The calibration plate is then fixed to the crack area to be measured using a fixing part. An imaging device (camera or drone) is then used to capture an image containing the plate and the crack. Due to the anti-reflective layer, the image will not have reflection errors. Finally, the relationship between the groove of the calibration plate and the corresponding pixel width is calibrated and converted into the true physical width through calculation, thereby improving the accuracy of crack width measurement. This device can conveniently calibrate crack width.

[0059] It should be understood that the application of this utility model is not limited to the examples above. Those skilled in the art can make improvements or modifications based on the above description, and all such improvements and modifications should fall within the protection scope of the appended claims.

Claims

1. A calibration plate for calibrating crack width, characterized in that, include: The plate includes an upper surface and a lower surface, both of which are smooth planes; An anti-reflective coating is applied to the upper surface; A fixing part is provided on the lower surface for fixing in the crack area; The upper surface is provided with a number of grooves at intervals, and the width of each groove is different.

2. A calibration plate for calibrating crack width according to claim 1, characterized in that, The width of all the grooves includes any combination of 1mm, 3mm, 5mm, 10mm, 20mm, 30mm and 50mm.

3. A calibration plate for calibrating crack width according to claim 1, characterized in that, The groove has a square cross-sectional shape.

4. A calibration plate for calibrating crack width according to claim 1, characterized in that, The number of grooves is set to six.

5. A calibration plate for calibrating crack width according to claim 1, characterized in that, The anti-reflective coating includes any one of the following: magnesium oxide anti-reflective coating, titanium oxide anti-reflective coating, silicon oxide anti-reflective coating, aluminum oxide anti-reflective coating, organic polymer anti-reflective coating, and silicon dioxide nanoparticle anti-reflective coating.

6. A calibration plate for calibrating crack width according to claim 1, characterized in that, The fixing part is an adhesive or a magnetic component.

7. A calibration plate for calibrating crack width according to claim 6, characterized in that, The fixing part is configured as a magnetic suction component, and the side of the magnetic suction component facing away from the plate is a plane, an arc surface or an inclined surface.

8. A calibration plate for calibrating crack width according to claim 1, characterized in that, The plate is an aluminum alloy plate or a composite plate.

9. A calibration plate for calibrating crack width according to claim 1, characterized in that, The plate has a length of 50-100mm, a width of 150-200mm, and a height of 5-20mm.

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