Defect detection device

Abstract

The present invention discloses a defect detection device, comprising: a fixing plate, a frame, a first camera and a strip light source, wherein the fixing plate is mounted on one side of the frame, a plurality of strip light sources are provided, the strip light sources are mounted on the other side of the frame, and the first camera is mounted on one side of the fixing plate close to the frame. The present invention has a simple structure, is easy to operate, and greatly improves the detection efficiency of the surface of household appliances.

Description

Technical Field

[0001] The present invention belongs to the technical field of detection tools, and more specifically relates to a defect detection device. Background Art

[0002] With the improvement of people's living standards, refrigerators, washing machines and other household appliances have become more popular in people's lives, and the production of refrigerators, washing machines and other household appliances has also developed rapidly. In the production process, it is inevitable that there will be some scratches, pits and other defects on the outer surface of refrigerators, washing machines and other household appliances. The existing testing equipment is not only complex in structure, but also cumbersome in testing methods and low in testing efficiency, which directly affects the production efficiency of household appliances.

[0003] Therefore, how to provide a defect detection device with high detection efficiency is a problem that technical personnel in this field need to solve urgently. Summary of the invention

[0004] In view of this, the present invention provides a defect detection device with simple structure and convenient operation, which greatly improves the detection efficiency of the surface of household appliances.

[0005] In order to achieve the above object, the present invention adopts the following technical solution:

[0006] A defect detection device comprises: a fixing plate, a frame, a first camera and a strip light source, wherein the fixing plate is mounted on one side of the frame, a plurality of strip light sources are provided and the strip light sources are mounted on the other side of the frame, and the first camera is mounted on a side of the fixing plate close to the frame.

[0007] Preferably, a light source fixing bar is installed at the top and bottom ends of the frame on a side away from the fixing plate, and a plurality of the strip-shaped light sources are installed in parallel between the light source fixing bars at the top and bottom ends.

[0008] Preferably, there are twelve strip-shaped light sources, which are divided into three groups and are lit up in sequence to complete the defect detection of surface protrusions or pits. The first group includes the first, fourth, seventh and tenth strips; the second group includes the second, fifth, eighth and eleventh strips; and the third group includes the third, sixth, ninth and twelfth strips.

[0009] Preferably, four first cameras are provided, which are arranged at the four corners of the fixing plate and in a rectangular arrangement; a circular hole is provided in the center of the fixing plate, and a second camera is installed at the circular hole.

[0010] Preferably, four frames of the fixing plate are all connected with fixing flanges, and the fixing flanges are connected to the frame via support rods.

[0011] Preferably, the support rod includes a strip plate, a first connecting plate and a second connecting plate, and the strip plate is provided with a plurality of holes; the first connecting plate and the second connecting plate are respectively connected to the two ends of the strip plate, the first connecting plate is connected to the fixing flange by bolts, and the second connecting plate is connected to the frame by bolts.

[0012] Preferably, a flange fixing piece is installed on a side of the fixing plate away from the frame.

[0013] Preferably, a plurality of apertures 2 are provided on the fixing plate.

[0014] Preferably, the defect detection device is installed on one side of the gantry, the inspected object is located on the side of the gantry away from the defect detection device, the gantry is installed with an external light source, and the irradiation light of the external light source is parallel to the surface of the inspected object.

[0015] Preferably, a wired laser is installed on the top of the gantry.

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

[0017] The present invention has a simple structure. Under the illumination of multiple strip light sources, the defects of protrusions or pits on the surface of household appliances will form independent bright spots, and the first camera is used to photograph the details of the defects such as protrusions and pits on the surface to be inspected. The operation is convenient and the detection efficiency is high, which is beneficial to improving the production efficiency of household appliances. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0019] Figure 1 The accompanying drawing is a schematic structural diagram of the present invention.

[0020] Figure 2 The attached picture is Figure 1 main view.

[0021] Figure 3 The attached picture is Figure 1 Rear view of.

[0022] Figure 4 The attached picture is Figure 1 Side view of.

[0023] Figure 5 The accompanying drawing is a schematic structural diagram of a fixing plate of the present invention.

[0024] Figure 6 The accompanying drawing is a schematic structural diagram of the support rod of the present invention.

[0025] Figure 7 The accompanying drawing is a schematic structural diagram of the flange fixing member of the present invention.

[0026] Figure 8 The accompanying drawing is a schematic structural diagram of the light source fixing strip of the present invention.

[0027] Fig. 9 The accompanying drawing is an application structure diagram of the defect detection device of the present invention.

[0028] FIG. 10 is a diagram showing the effect of protrusions and pits on the surface of the inspected object according to the present invention.

[0029] Fig.11 The accompanying drawing is a rendering of the scratch defect on the surface of the detected object according to the present invention.

[0030] Figure 12(a) , 12(b) , Figure 12(c) is a diagram showing the detection effect of the flatness of the door body of the present invention.

[0031] Among them, in the figure,

[0032] 1-fixed plate; 2-frame; 3-first camera; 4-strip light source; 5-light source fixing strip; 6-round hole; 7-second camera; 8-fixed flange; 9-support rod; 91-strip plate; 92-first connecting plate; 93-second connecting plate; 94-gap one; 10-flange fixing piece; 11-gap two; 12-object to be inspected; 13-gantry; 14-conveyor line; 15-manipulator; 16-computer cabinet; 17-distribution cabinet; 18-line laser. DETAILED DESCRIPTION

[0033] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0034] Please see attached Figure 1-4 The present invention provides a defect detection device, including: a fixed plate 1, a frame 2, a first camera 3 and a strip light source 4, the fixed plate 1 is installed on one side of the frame 2, the strip light source 4 is provided with multiple strips, the strip light source 4 is installed on the other side of the frame 2, and the first camera 3 is installed on the side of the fixed plate 1 close to the frame 2.

[0035] Reference Figure 1 and attached Figure 8A light source fixing bar 5 is installed at the top and bottom ends of the frame 2 away from the fixing plate 1, and multiple strip light sources 4 are installed in parallel between the light source fixing bars 5 at the top and bottom ends, so as to facilitate the installation and disassembly of the strip light sources 4, and the strip light sources 4 are not affected.

[0036] The strip light source 4 is provided with twelve strips, which are divided into three groups and lighted up in sequence, so as to complete the defect detection of all protrusions or pits on the surface. The first group includes the first, fourth, seventh and tenth strips; the second group includes the second, fifth, eighth and eleventh strips; the third group includes the third, sixth, ninth and twelfth strips. Each group is lit up in sequence, and the first camera 3 takes a total of three photos to complete the defect detection of protrusions or pits on a surface. The detection effect diagram is shown in the attached figure. Figure 10(a) , 10(b) .

[0037] Reference Fig. 9 , one end of the defect detection device is mounted on the manipulator through a flange fixing 10, and the other end is mounted on one side of the gantry 13. The inspected object 12 is located on the side of the gantry 13 away from the defect detection device, and the inspected object 12 is placed on the conveyor line 14. The gantry 13 is equipped with an external light source, and the irradiation light of the external light source is parallel to the surface of the inspected object. The external light source includes external light source 1, external light source 2, external light source 3 and external light source 4. The gantry 13 is equipped with external light source 1 at the top, external light source 2 at the bottom, external light source 3 on the left, and external light source 4 on the right. External light source 1 and external light source 2 form a group, and external light source 3 and external light source 4 form a group. The irradiation light of the two groups of external light sources is perpendicular to each other. Since scratch defects have obvious lighting effects for light sources with higher parallelism, but not obvious lighting effects in directions nearly perpendicular to them, the present invention is provided with four external light sources, which are divided into two groups. The irradiation light rays are perpendicular to each other and are divided into two groups to illuminate inwards in a perpendicular manner. This lighting method can highlight scratches at various angles. The first camera collects relevant images, and the machine vision detection technology is used to extract defects, thereby completing the scratch detection on the surface of the inspected object. The detection effect diagram is shown in the attached figure. Fig.11 The present invention controls the operation of the defect detection device and the manipulator 15 through the computer cabinet 16, and the power distribution cabinet 17 provides the required electric energy for the computer cabinet, the defect detection device, the manipulator and the external light source.

[0038] A line laser 18 is installed on the top of the gantry 13. The present invention uses a line laser to assist in shooting flatness. It is mainly used for flatness detection of two doors of household appliances (such as refrigerators). The line laser uses a line laser to illuminate the two doors in a manner of obliquely hitting the detected object. If the two doors are uneven, the bright spots of the line laser hitting the two doors will not be straight, aligned, angled or offset, thereby completing the detection of the flatness of the two doors. See the attached detection effect diagram. Figure 12(a) , 12(b) 、12(c).

[0039] Four first cameras 3 are provided, which are arranged at the four corners of the fixed plate 1 in a rectangular arrangement. Therefore, the present invention adopts four first cameras 3 arranged in a rectangular shape, and cooperates with the strip light source 4 and the external light source installed on the gantry to shoot the details of the defects such as protrusions, pits, scratches, and paint peeling on the surface to be inspected. A circular hole 6 is provided in the center of the fixed plate 1, and a second camera 7 is installed at the circular hole 6 for shooting the entire object to be inspected.

[0040] Reference Figure 5-6 The four frames of the fixed plate 1 are connected with fixed flanges 8, and the fixed flanges 8 are connected to the frame 2 through the support rods 9. The support rods 9 include a strip plate 91, a first connecting plate 92, and a second connecting plate 93. The strip plate 91 is provided with a plurality of holes 94, and the holes 94 are triangular holes, which not only saves the use of raw materials, reduces the production cost, but also reduces the weight of the support rod 9; the first connecting plate 92 and the second connecting plate 93 are respectively connected to the two ends of the strip plate 91, the first connecting plate 92 is connected to the fixed flange 8 by bolts, and the second connecting plate 93 is connected to the frame 2 by bolts, so that the installation of the fixed plate 1 and the frame 2 is completed, and it is easy to disassemble.

[0041] Reference Figure 7 A flange fixing part 10 is installed on the side of the fixing plate 1 away from the frame 2. The defect detection device of the present invention can be connected to other equipment through the flange fixing part 10, thereby facilitating the control of the defect detection device.

[0042] In another embodiment, a plurality of pores 11 are provided on the fixing plate 1 , and the pores 11 are trapezoidal pores, which not only saves the use of raw materials and reduces the production cost, but also reduces the weight of the fixing plate 1 .

[0043] The present invention has a simple structure. By irradiating an external light source with mutually perpendicular light rays, and the light rays irradiated by the external light source are parallel to the surface of the inspected object, light approximately parallel to the surface of the household appliance can be emitted, thereby highlighting scratch defects. Under the irradiation of multiple strip light sources, protrusions or pits will form independent bright spots. The line laser can detect the uneven defects of the two doors of the household appliance, thereby completing multi-faceted detection of the surface of the household appliance. The operation is convenient and the detection efficiency is high, which is beneficial to improving the production efficiency of the household appliances.

[0044] The present invention can not only be applied to household appliances such as refrigerators, washing machines, air conditioners, dishwashers, etc., but also has a good detection effect on glass plates.

[0045] In this specification, each embodiment is described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the embodiments can be referred to each other. For the device disclosed in the embodiment, since it corresponds to the method disclosed in the embodiment, the description is relatively simple, and the relevant parts can be referred to the method part.

[0046] The above description of the disclosed embodiments enables one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A defect detection device, characterized in that: include: A fixing plate, a frame, a first camera and a strip light source, wherein the fixing plate is mounted on one side of the frame, a plurality of strip light sources are provided, the strip light sources are mounted on the other side of the frame, and the first camera is mounted on a side of the fixing plate close to the frame; A light source fixing strip is installed at the top and bottom of one side of the frame away from the fixing plate, and a plurality of bar-shaped light sources are installed in parallel between the light source fixing strips at the top and bottom ends; The strip light sources are provided with twelve strips, which are divided into three groups and lighted up in sequence to complete the defect detection of surface protrusions or pits. The first group includes the first, fourth, seventh and tenth strips; the second group includes the second, fifth, eighth and eleventh strips; the third group includes the third, sixth, ninth and twelfth strips; The defect detection device is installed on one side of the gantry, the object to be detected is located on a side of the gantry away from the defect detection device, the gantry is installed with an external light source, and the irradiation light of the external light source is parallel to the surface of the object to be detected; The external light sources include external light source one, external light source two, external light source three and external light source four. External light source one is installed on the top of the gantry, external light source two is installed on the bottom, external light source three is installed on the left side, and external light source four is installed on the right side. External light source one and external light source two are a group, and external light source three and external light source four are a group. The illumination light of the two groups of external light sources is perpendicular to each other.

2. A defect detection device according to claim 1, characterized in that: There are four first cameras, which are arranged at the four corners of the fixing plate in a rectangular arrangement; a circular hole is provided in the center of the fixing plate, and a second camera is installed at the circular hole.

3. A defect detection device according to claim 1, characterized in that: The four frames of the fixing plate are all connected with fixing flanges, and the fixing flanges are connected to the frame through supporting rods.

4. A defect detection device according to claim 3, characterized in that: The support rod includes a strip plate, a first connecting plate and a second connecting plate, and a plurality of holes are provided on the strip plate; the first connecting plate and the second connecting plate are respectively connected to the two ends of the strip plate, the first connecting plate is connected to the fixing flange by bolts, and the second connecting plate is connected to the frame by bolts.

5. A defect detection device according to claim 1, characterized in that: A flange fixing piece is installed on one side of the fixing plate away from the frame.

6. A defect detection device according to claim 1, characterized in that: The fixing plate is provided with a plurality of apertures 2.

7. A defect detection device according to claim 1, characterized in that: A wired laser is installed on the top of the gantry.

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