A kind of inspection tool and silver-copper composite strip silver bar precision detection device

Abstract

The utility model provides a checking fixture and a device for detecting the accuracy of silver bars in a silver-copper composite belt, wherein the checking fixture is used for detecting the accuracy of silver bars in a silver-copper composite belt, and comprises: a checking fixture body, a composite belt through groove for passing the silver-copper composite belt is formed on the front and rear sides of the checking fixture body, and a plurality of silver bar holes for displaying the position and size of the silver bars in the silver-copper composite belt are formed on the checking fixture body; the width of the silver bar holes is consistent with the standard width of the silver bars in the silver-copper composite belt; the interval between two silver bar holes is consistent with the standard interval between two silver bars in the silver-copper composite belt. The device for detecting the accuracy of silver bars in a silver-copper composite belt comprises: a checking fixture; an image acquisition device for acquiring images of the checking fixture; a detection light source for supplementary lighting; and a PC computer for detecting using an image algorithm to obtain detection results. The utility model can overcome the problems of low efficiency and inability to guarantee detection accuracy caused by manual observation.

Description

Technical Field

[0001] The utility model relates to the technical field of fuses, in particular to a checking fixture and a silver-copper composite strip silver bar precision detection device. Background Art

[0002] Silver-copper composite strip is a molten material, which is composed of silver strips and copper strips of equal thickness distributed alternately along the width of the strip. It is mainly used in fuses for new energy vehicles, high-speed railway locomotives and other equipment. The structure of silver-copper composite strip 2 is as follows Figure 1 As shown. When in use, it is necessary to punch holes arranged at equal distances on the silver bar 2-1, and the holes are connected by narrow diameters. If the circuit is short-circuited or fails during use, the excessive current density will melt the narrow diameter to achieve the purpose of protecting the circuit. Compared with pure silver melt materials, the silver-copper composite belt melt material has a cost reduction of about 50%, and has a strong market competitive advantage. When the silver-copper composite belt 2 is in use, it is necessary to punch holes arranged at equal distances on the silver bar 2-1. The size or position deviation of the silver bar 2-1 will cause the holes to deviate from the silver bar 2-1, resulting in fuse failure. Therefore, the accuracy of the silver bar is an important technical indicator of the silver-copper composite belt. The silver-copper composite belt 2 is made of a blank after the silver bar 2-1 and the copper bar 2-2 are alternately compounded and rolled through multiple passes. During the manufacturing process, the position or size of the silver bar 2-1 may change. Therefore, when testing the finished product of the silver-copper composite belt 2, it is necessary to test whether the accuracy of the silver bar 2-1 meets the requirements.

[0003] Among the existing devices for detecting the accuracy of silver bars, such as the Chinese utility model patent with the publication number and name CN216925432U-Composite strip detection device, a gauge for judging whether the straightness of a silver bar meets the requirements is disclosed. First, the silver-copper strip is clamped in the clamping groove, and then the gauge body is turned over, and the clamping groove together with the silver-copper strip is placed downward. By observing whether the side line of the silver bar and the side line of the narrow diameter mouth are misaligned or deviated, it is judged whether the straightness of the silver bar meets the requirements. This gauge solves the problem of effectively detecting the straightness of the silver bar to a certain extent. However, when the gauge detects the straightness of the silver bar, manual observation is still required to judge whether the silver bar has deviations. The degree of automation is low, and the detection accuracy cannot be guaranteed. Utility Model Content

[0004] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0005] The utility model provides a first aspect of a gauge for silver bar precision detection of a silver-copper composite strip, comprising: a gauge body, a composite strip through slot for passing the silver-copper composite strip is formed on the front and rear sides of the gauge body, and a plurality of silver bar holes for displaying the position and size of the silver bar in the silver-copper composite strip is formed on the gauge body;

[0006] The width of the silver bar hole is consistent with the standard width of the silver bar in the silver-copper composite belt; the interval between two silver bar holes is consistent with the standard interval between two silver bars in the silver-copper composite belt.

[0007] Based on the above, positioning components for fixing the gauge at a target position are provided at the left and right ends of the gauge body.

[0008] Based on the above, the positioning member is a bolt, a pin or a positioning through hole.

[0009] Based on the above, the width of the composite belt through groove is equal to the width of the silver-copper composite belt.

[0010] Based on the above, the width of the composite belt slot is greater than the width of the silver-copper composite belt, and the inspection fixture also includes a limiting component for adjusting the width of the composite belt slot, and the limiting component is a limiting block, a limiting baffle or a limiting through hole.

[0011] Based on the above, the silver bar hole is an opening formed on the upper side of the gauge body, or a through hole formed on the upper and lower sides of the gauge body.

[0012] The second aspect of the utility model is a silver-copper composite strip silver bar precision detection device, comprising:

[0013] A testing fixture, wherein the testing fixture is used to pass through the silver-copper composite belt to be tested;

[0014] An image acquisition device, arranged above the inspection tool, for acquiring an image at the position of the silver bar hole of the inspection tool;

[0015] A detection light source is arranged above the inspection fixture and is used to provide fill light when the image acquisition device acquires an image of the inspection fixture;

[0016] The PC is connected to the image acquisition device for receiving the image acquired by the image acquisition device and using an image algorithm to detect whether the exposed portion of the silver bar hole in the received image contains copper to obtain a detection result.

[0017] Based on the above, the detection light source is a white scattered light source.

[0018] Based on the above, the silver-copper composite strip silver bar accuracy detection device also includes a silver-copper composite strip conveying device for conveying the silver-copper composite strip to be detected to the inspection fixture and recovering the silver-copper composite strip passing through the inspection fixture.

[0019] Based on the above, the silver-copper composite belt conveying device is provided with a tensioning device for tensioning the silver-copper composite belt to be tested that passes through the inspection fixture.

[0020] The utility model has substantial features and progress compared with the prior art, specifically:

[0021] In order to overcome the problems of low efficiency and unguaranteed detection accuracy caused by manual observation, the silver-copper composite strip silver bar accuracy detection device provided in this embodiment collects the image of the inspection fixture through an image acquisition device, and then uses a PC computer to perform an automated image algorithm to detect whether the exposed part of the silver bar hole contains copper, so as to obtain the detection result quickly and accurately. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the structure of the silver-copper composite belt.

[0023] Figure 2 It is a structural schematic diagram of the utility model inspection tool.

[0024] Figure 3 The utility model is a structural schematic diagram of a silver bar precision detection device for a silver-copper composite belt.

[0025] Figure 4 The utility model is a flow chart of the HSV threshold comparison method based on visual color recognition adopted by the PC computer.

[0026] Figure 5 The utility model is a schematic structural diagram of a silver-copper composite belt conveying device. DETAILED DESCRIPTION

[0027] In order to more clearly understand the above-mentioned purpose, features and advantages of the utility model, the utility model is further described in detail below in conjunction with the accompanying drawings and specific implementation methods. It should be noted that the embodiments of the present application and the features in the embodiments can be combined with each other without conflict.

[0028] like Figure 2 As shown, this embodiment provides a gauge 1 for detecting the accuracy of silver bars of a silver-copper composite strip 2, comprising: a gauge body, a composite strip through groove 1-1 for passing the silver-copper composite strip is formed on the front and rear sides of the gauge body, and a plurality of silver bar holes 1-2 for displaying the position and size of the silver bar 2-1 in the silver-copper composite strip 2 are formed on the gauge body; the width of the silver bar hole 1-2 is consistent with the standard width of the silver bar 2-1 in the silver-copper composite strip 3; the interval between the two silver bar holes 1-2 is consistent with the standard interval between the two silver bars 2-1 in the silver-copper composite strip 2.

[0029] Further, preferably, the silver bar hole 1-2 is an opening formed on the upper side of the gauge body, or a through hole formed on the upper and lower sides of the gauge body. The silver bar hole can be a rectangular hole, or a rectangular hole with semicircular ends.

[0030] The working principle of this gauge is as follows:

[0031] First, the silver-copper composite belt is passed through the composite belt slot, and the exposed part of the silver bar hole is observed to see whether it contains copper, that is, whether it is all silver bar, so as to judge whether the position and size of the silver bar are qualified.

[0032] It can be seen that the above method is simple, convenient and easy to implement.

[0033] In one embodiment of the present application, positioning components for installing and fixing the gauge 1 are provided at the left and right ends of the gauge body;

[0034] In this embodiment, the positioning member is used to fix the gauge 1 at a target position, such as a work platform, so that the gauge 1 can be limited in position to ensure the stability of the gauge 1 and that the position does not deviate.

[0035] Further, preferably, the positioning member is a bolt or a pin, and accordingly, the target position, such as a working platform, is provided with a threaded hole matched with the bolt, or a pin hole matched with the pin.

[0036] Further, preferably, in order to ensure the accuracy of positioning, positioning holes 1-3 may be provided on the inspection fixture 1, and correspondingly, the target position, such as the working platform, needs to be provided with positioning pins that match the positioning holes 1-3.

[0037] According to the structure described above, positioning structures are provided at both ends of the gauge 1, so that the gauge 1 is firmly positioned at a target position such as a work platform, so that the orientation of the gauge 1 itself will not deviate, which helps to improve the detection accuracy.

[0038] In one embodiment of the present application, the width of the composite belt slot is greater than or equal to the width of the silver-copper composite belt. When the width of the composite belt slot is greater than the width of the silver-copper composite belt, the inspection tool further includes a limiting member for adjusting the width of the composite belt slot.

[0039] Since silver-copper composite strips have different specifications ( Figure 2 The figure shows 2 silver bars, and some have 3, 4, 5 or even more silver bars). Different inspection tools can be prepared for silver-copper composite belts of different specifications. By making the width of the composite belt slot equal to the width of the silver-copper composite belt, inspection tools of different specifications can be selected for inspection of silver-copper composite belts of different specifications. A inspection tool with a wider composite belt slot can also be prepared. When a narrower composite belt needs to be inspected, the width of the composite belt slot can be adjusted to match the width of the silver-copper composite belt by using a limiting component. In this way, one inspection tool can be used to inspect silver-copper composite belts of different specifications.

[0040] In this embodiment, the limiting component can be a limiting block, a limiting baffle or a limiting through hole, wherein the limiting block can be detachably fixed at the composite belt slot, the limiting baffle can be detachably inserted into the composite belt slot, and the limiting through hole can be inserted into a limiting pin.

[0041] like Figure 3 As shown, this embodiment also provides a silver-copper composite strip silver bar accuracy detection device, comprising:

[0042] A test fixture 1 is used to pass the silver-copper composite strip 2 to be tested;

[0043] An image acquisition device 3, arranged above the inspection tool 1, for acquiring an image of the inspection tool 1;

[0044] A detection light source 4, arranged above the inspection fixture 1, for providing fill light when the image acquisition device acquires an image of the inspection fixture 1;

[0045] The PC computer 5 is connected to the image acquisition device 3 for communication, and is used for receiving the image acquired by the image acquisition device 3, and using an image algorithm to detect whether the exposed portion of the silver bar hole 1-2 in the received image contains copper, to obtain a detection result; if it contains copper, the detection result is unqualified, otherwise the detection result is qualified.

[0046] It should be noted that: an image algorithm is used to detect whether the exposed part of the silver bar hole in the received image contains copper color to obtain the detection result. When implementing it, a variety of image algorithms can be used, such as the HSV threshold comparison method based on visual color recognition, the opencv color recognition method, etc.

[0047] The HSV threshold comparison method based on visual color recognition adopted in this embodiment is as follows: Figure 4 As shown:

[0048] After reading the image, filter and denoise processing is performed;

[0049] The image is segmented to extract the area containing only the silver bar hole position, and the rest is set as the background;

[0050] Convert the image to HSV format;

[0051] Select a suitable threshold range; the threshold range for copper is: H<80, S>20, V<80;

[0052] Compare the HSV value of each pixel of the image with the threshold, and mark it as 1 if it is within the threshold range;

[0053] According to the accuracy requirements, the minimum number of consecutive pixels N that is considered unqualified is determined;

[0054] If the number of continuous copper pixels is ≥ N, the detection result is unqualified and can be marked.

[0055] The silver bar precision detection device of the silver-copper composite strip provided in this embodiment collects the image of the inspection fixture through the image acquisition device 3, and then the PC computer 4 performs an automated image algorithm to detect whether the exposed part of the silver bar hole 1-2 contains copper, so as to obtain the detection result quickly and accurately.

[0056] Preferably, in order to avoid color interference caused by light on the collected image and because metal has severe reflection, the detection light source 4 adopts a white scattered light source.

[0057] In one embodiment of the present application, the silver-copper composite strip silver bar precision detection device also includes a silver-copper composite strip conveying device, which is used to convey the silver-copper composite strip 2 to be detected to the inspection fixture 1, and then recover the silver-copper composite strip that passes through the inspection fixture 1; preferably, the silver-copper composite strip conveying device is provided with a tensioning device for tensioning the silver-copper composite strip to be detected that passes through the inspection fixture.

[0058] In this embodiment, if Figure 5 As shown, the silver-copper composite belt conveying device includes a pay-off wheel 6-1, a take-up wheel 6-2, two steering wheels 6-3 and a tensioning wheel 6-4;

[0059] The unwinding wheel 6-1 and the taking-up wheel 6-2 are arranged on both sides of the composite tape slot 1-1 of the inspection fixture 1. The silver-copper composite tape 2 released by the unwinding wheel 6-1 passes through the composite tape slot of the inspection fixture 1 under the guidance of one of the steering wheels 6-3, and is then rolled up and recovered by the taking-up wheel 6-2 under the guidance of the other steering wheel 6-3; wherein the tensioning wheel 6-4 is arranged between the other steering wheel 6-3 and the taking-up wheel 6-2.

[0060] According to the structure of the silver-copper composite belt conveying device described above, it can be known that, driven by the silver-copper composite belt conveying device, after the silver-copper composite belt 2 to be inspected passes through the inspection fixture 1 and is inspected, it is rolled up and recovered, thereby realizing the automatic transmission of the silver-copper composite belt 2.

[0061] The above is only a specific implementation of the utility model, but the protection scope of the utility model is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed by the utility model, which should be included in the protection scope of the utility model. Therefore, the protection scope of the utility model should be based on the protection scope of the claims.

Claims

1. A test fixture for silver bar precision detection of silver-copper composite strips, characterized in that: include: A gauge body, wherein the front and rear sides of the gauge body are formed with composite belt through grooves for passing the silver-copper composite belt, and the gauge body is formed with a plurality of silver bar holes for displaying the position and size of the silver bars in the silver-copper composite belt; The width of the silver bar hole is consistent with the standard width of the silver bar in the silver-copper composite belt; the interval between two silver bar holes is consistent with the standard interval between two silver bars in the silver-copper composite belt.

2. The inspection tool according to claim 1, characterized in that: Positioning components for fixing the gauge at a target position are provided at the left and right ends of the gauge body.

3. The inspection tool according to claim 2, characterized in that: The positioning member is a bolt, a pin or a positioning through hole.

4. The gauge according to any one of claims 1 to 3, characterized in that: The width of the composite belt through groove is equal to the width of the silver-copper composite belt.

5. The gauge according to any one of claims 1 to 3, characterized in that: The width of the composite belt slot is greater than the width of the silver-copper composite belt. The inspection tool further includes a limiting component for adjusting the width of the composite belt slot. The limiting component is a limiting block, a limiting baffle or a limiting through hole.

6. The gauge according to any one of claims 1 to 3, characterized in that: The silver bar hole is an opening formed on the upper side of the gauge body, or a through hole formed on the upper and lower sides of the gauge body.

7. A silver-copper composite strip silver bar precision detection device, characterized in that: include: A test fixture, comprising the test fixture according to any one of claims 1 to 6, used for passing the silver-copper composite strip to be tested; An image acquisition device, arranged above the inspection tool, for acquiring an image at the position of the silver bar hole of the inspection tool; A detection light source is arranged above the inspection fixture and is used to provide fill light when the image acquisition device acquires an image of the inspection fixture; The PC is connected to the image acquisition device for receiving the image acquired by the image acquisition device and using an image algorithm to detect whether the exposed portion of the silver bar hole in the received image contains copper to obtain a detection result.

8. The silver bar precision detection device of the silver-copper composite strip according to claim 7 is characterized in that: The detection light source is a white scattered light source.

9. The silver bar precision detection device of the silver-copper composite strip according to any one of claims 7-8, characterized in that: The silver-copper composite strip silver bar precision detection device also includes a silver-copper composite strip conveying device for conveying the silver-copper composite strip to be detected to the inspection tool and recovering the silver-copper composite strip passing through the inspection tool.

10. The silver bar precision detection device of the silver-copper composite strip according to claim 9 is characterized in that: The silver-copper composite belt conveying device is provided with a tensioning device for tensioning the silver-copper composite belt to be tested that passes through the inspection fixture.

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