TWI628412B - Bearing inspecting apparatus - Google Patents

Abstract

A bearing inspection device includes a platform, a lighting device, an image capturing device and an image processing device. The platform is used to horizontally place a bearing to be inspected and in a ring shape. The illumination device is disposed in the center of the platform and provides a horizontal radial light source to illuminate the inner ring surface of the bearing. The image capturing device is configured to capture an image of the bearing through the bearing directly above the bearing. The image processing device obtains characteristic values of a plurality of objects on the surface of the inner ring of the bearing from the image, and determines whether the number of parts on the surface of the inner ring of the bearing is correct according to the characteristic value of the objects.

Description

Bearing inspection device

The present invention relates to an inspection apparatus, and more particularly to a bearing inspection apparatus for inspecting whether a part in a bearing is missing.

As far as the prior art is concerned, in order to check whether a part such as a shaft pin in a bearing (for example, a bearing for a vehicle) is assembled on the bracket body of the bearing without any leakage, the general manufacturer is manually inspected by the operator to eliminate or Recycling defective bearings that are not completely assembled.

However, the above-mentioned manual inspection method is liable to cause an inaccurate inspection due to human factors such as vertigo. At the same time, the manual inspection method is also inefficient.

Therefore, it is necessary to provide a bearing inspection device to solve the problems of the conventional technology.

SUMMARY OF THE INVENTION A primary object of the present invention is to provide a bearing inspection device that automatically recognizes whether the number of components assembled in the bearing is correct, thereby avoiding various conventional manual inspection methods.

In order to achieve the above object, the present invention provides a bearing inspection device comprising: a platform for horizontally placing a bearing to be inspected and in a ring shape; The device is disposed at the center of the platform, and the bearing surrounds the illuminating device when the bearing is placed on the platform; the illuminating device provides a horizontal radial light source to illuminate the inner ring surface of the bearing; and an image capturing device is located above the platform An image for illuminating the bearing from directly above the bearing; and an image processing device for connecting the image capturing device, the image processing device obtaining a plurality of surfaces on the inner ring of the bearing from the image The characteristic value of the object, and then according to the characteristic value of the object, whether the number of parts on the inner ring surface of the bearing is correct.

In an embodiment of the invention, the feature value of the object is an area value of each object; the image processing device calculates the number of parts of the bearing according to an area standard value of each object in the image conforming to a preset standard range.

In an embodiment of the invention, the image processing device performs binarization processing on the image.

In an embodiment of the present invention, the image processing device performs noise filtering processing on the image, wherein the noise filtering process scans the image to find a circle and an inner circle of a bearing contour, and then The area other than the outer circle and the area inside the inner circle are excluded or blackened in the image.

In one embodiment of the invention, the image capture device has a lens that is centered on the bearing.

In an embodiment of the invention, the illuminating device has a casing and a tungsten lamp, and the tungsten lamp is disposed inside the casing, and a top surface of the casing is provided with a visor having a larger area than the top surface.

In an embodiment of the invention, the housing has a light transmissive upper half And a non-transmissive lower half; the light transmissive upper half is between the top surface and the non-transmissive lower half.

In an embodiment of the present invention, the bearing inspection device further includes a hood body covering the platform such that the illumination device, the image capturing device and the image processing device are located inside the hood body .

In an embodiment of the invention, the platform is provided with a plurality of positioning seats arranged at intervals around the lighting device to jointly support the bearing to be inspected.

It can be seen from the above that the bearing inspection device provided by the present invention obtains a structural image of the surface of the bearing inner ring by using an illumination device capable of providing a horizontal radial light source, and an image capturing device above the platform, and is based on the bearing through the image processing device. The characteristic values of the plurality of objects on the surface of the ring determine whether the number of parts on the inner ring surface of the bearing is correct. This method can replace the traditional manual inspection method, greatly improve the inspection accuracy, and also improve the inspection efficiency.

10‧‧‧ platform

100‧‧‧ Positioning Block

11‧‧‧Lighting device

110‧‧‧shell

111‧‧‧Lighting

110a‧‧‧The upper half of the light

110b‧‧‧The lower half of the light transmission

112‧‧ ‧ visor

12‧‧‧Image capture device

13‧‧‧Image processing device

14‧‧‧ bearing

140‧‧‧ objects

A‧‧‧ Missing object location

BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 is a perspective view of a bearing inspection device in accordance with a preferred embodiment of the present invention.

Figure 2 is a perspective view of a bearing inspection device and a bearing to be inspected in accordance with a preferred embodiment of the present invention.

Figure 3 is a perspective view of a lighting device of a bearing inspection device in accordance with a preferred embodiment of the present invention.

4 is a side view of a lighting device of a bearing inspection device according to a preferred embodiment of the present invention. view.

Fig. 5 is an image of a bearing to be inspected obtained by a bearing inspection device according to a preferred embodiment of the present invention.

Figure 6 is an image of a bearing to be inspected with a product package obtained by a bearing inspection device according to another preferred embodiment of the present invention.

Figure 7 is an image of a bearing to be inspected which is missing from the bearing inspection device of a preferred embodiment of the present invention.

Fig. 8 is a graph showing the relationship between the object and the angular position obtained by analyzing the captured image of the bearing to be inspected which is missing from the part shown in Fig. 7.

The above and other objects, features and advantages of the present invention will become more <RTIgt; Furthermore, the directional terms mentioned in the present invention, such as upper, lower, top, bottom, front, rear, left, right, inner, outer, side, surrounding, central, horizontal, horizontal, vertical, longitudinal, axial, Radial, uppermost or lowermost, etc., only refer to the direction of the additional schema. Therefore, the directional terminology used is for the purpose of illustration and understanding of the invention.

Please refer to FIG. 1 , which is a perspective view of a bearing inspection device according to a preferred embodiment of the present invention. The bearing inspection device of the present invention mainly comprises a platform 10, a lighting device 11, an image capturing device 12 and an image processing device 13.

Referring further to Figure 2, the platform 10 is used for horizontal placement. Check and ring the bearing 14. The bearing 14 can be an automotive bearing that includes components such as a shaft pin, a stop, and a bracket member.

As shown in FIG. 2, the illuminating device 11 is disposed at the center of the platform 10, and surrounds the illuminating device 11 when the bearing 14 is placed on the platform 10. In other words, the illuminating device 11 corresponds to the ring of the bearing 14. The center point of the contour; wherein the illumination device 11 provides a horizontal radial light source to illuminate the inner ring surface of the bearing 14. In this embodiment, the platform 10 is further provided with a plurality of positioning seats 100, which are arranged at intervals around the lighting device 11 to jointly support the bearing 14 to be inspected.

Please refer to FIG. 3 and FIG. 4 , which are a perspective view and a side view of a lighting device according to a preferred embodiment of the present invention. The lighting device 11 has a housing 110 and a light fixture 111. Inside the housing 110, a top surface of the housing 110 is provided with a visor 112 having a larger area than the top surface. The visor 112 may be in the shape of a disk and may have a black appearance, the outer edge of which extends radially beyond the The top surface of the housing 110. The housing 110 has a light transmissive upper half 110a and a non-transmissive lower half 110b; the light transmissive upper half 110a is interposed between the top surface and the non-transmissive lower half 110b. In this way, when the illuminator 111 emits light, the non-transmissive lower half 110b and the visor 112 can block the light that is not close to the horizontal emission, so as to avoid the light that is not close to the horizontal emission from being non-bearing components (such as a platform). The locator 100 of 10) reflects and increases the noise of subsequent image capture. In an embodiment, the luminaire 111 is a tungsten filament lamp, but is no longer limited thereto.

As shown in FIG. 2, in the embodiment, the image capturing device 12 can be positioned above the platform 10 by a cantilever arrangement for directly from the bearing 14. The image of the bearing 14 passing through the illumination device 11 is taken. In the embodiment, the image capturing device 12 has a lens facing the center of the bearing 14, and the lens can be a wide-angle lens, so that the image capturing device 12 can capture enough when shooting from above. A structural image of the inner ring surface of the bearing 14.

As shown in FIG. 2, in the embodiment, the image processing device 13 is connected to the image capturing device 12, which may be a computer device. Please refer to FIG. 5 for an image of the bearing to be inspected obtained by the bearing inspection device according to a preferred embodiment of the present invention. The image processing device 13 obtains characteristic values of a plurality of objects 140 (for example, components such as a pin, a stopper, and a bracket member) on the inner ring surface of the bearing 14 from the image, and determines the bearing based on the feature values of the objects. The number of parts installed on the inner ring surface of 14 is correct.

As shown in FIG. 5, in a preferred embodiment, the feature value of the object 140 is an area value of each object; and the image processing device 13 conforms to a preset standard range according to the area value of each object 140 in the image. The number of parts is calculated, that is, if the area value of an object 140 conforms to the preset standard range, it is judged that the object belongs to the part of the bearing. The preset standard range can be determined by: taking the image with the unchecked bearing as a standard component in advance; then obtaining the area value of each object in the image; and then according to the minimum value of the area value of each object The maximum range and the maximum value range are covered by the maximum value, wherein the two end values of the standard range are respectively close to the minimum value and the maximum value.

In a preferred embodiment, the image processing device 13 can perform binarization on the image to convert the image into a black and white image, which helps simplify and clarify The outline area of each object in the image. In a preferred embodiment, for example, as shown in FIG. 6, an image of a bearing to be inspected with a product package obtained by a bearing inspection device according to another preferred embodiment of the present invention, from which the bearing can be seen The relationship itself is covered by transparent wrappers, adding more reflected light noise interference. In order to avoid interference of external light or noise such as product packaging, the image processing device 13 can also perform noise filtering processing on the image, wherein the noise filtering process specifically scans the image to find an annular bearing profile. The outer circle (outer ring or outer edge) and the inner circle (inner ring or inner edge), in which the area outside the outer circle and the area inside the inner circle are excluded or blackened in the image, leaving only the bearing profile range The image area inside is used to identify each object.

Through the bearing inspection device described above, the user only needs to place the bearing on the platform 10, turn on the illumination device 11 and drive the image capture device 12 to perform image capture, and the image processing device 13 can be directly and quickly determined. The number of parts on the inner ring surface of the bearing. If the number of parts does not meet the expected number of parts, it means that the bearing parts are installed or not, and the bearing can be eliminated or recycled.

In addition to determining whether the number of parts of the bearing is missing, the bearing inspection device of the present invention can first position the angular orientation of a plurality of fixed objects according to the characteristic value, and then determine the number of the fixed objects according to the angular orientation of the fixed objects. The preset orientation of the non-fixed object, and finally whether the corresponding non-fixed object exists in the preset orientation of the non-fixed object, to know the position of the missing part on the bearing. As shown in Figures 7 and 8, since some of the parts on the bearing are fixed, for example, the block with a larger area is integrally formed with the body of the bearing and is fixed. After obtaining the image of the bearing, the image processing device 13 can first find the angular orientation of the larger-sized stopper, and then determine the preset orientation of other parts (such as the shaft pin) between the stoppers according to the position of the stopper; As shown in FIG. 8, after analyzing the captured image of the bearing to be inspected for the missing part shown in FIG. 7, the image processing device 13 can provide a graph of the relationship between the object and the angular orientation of the bearing, and the relationship chart can be clearly List the angular orientation of each object. If it is found that there is no corresponding object in a certain angular orientation (such as the missing object position A in Figure 7), you can mark it with a bold color as shown in Figure 8. The user can not only know whether the bearing is missing or not, but also know the bearing position of the bearing.

In another embodiment, the bearing inspection device may further include a hood body (not shown), the hood system entirely covering the platform 10, such that the illumination device 11, the image capturing device 12 and the image The processing device 13 is located inside the hood body to provide a darkroom environment with almost no external light noise. In a preferred embodiment, the hood body may be assembled from a frame and a plurality of visors, but not limited thereto.

In summary, compared with the conventional manual inspection mode, the bearing inspection device provided by the present invention obtains a structural image of the inner surface of the bearing by using an illumination device capable of providing a horizontal radial light source and an image capturing device above the platform. The image processing device determines whether the number of parts on the inner surface of the bearing is correct according to the characteristic values of the plurality of objects on the surface of the inner ring of the bearing. Therefore, the invention can greatly improve inspection accuracy and inspection efficiency.

Although the invention has been disclosed in the preferred embodiments, it is not intended to be limiting In the present invention, those skilled in the art can make various changes and modifications without departing from the spirit and scope of the invention, and the scope of the present invention is defined by the scope of the appended claims. .

Claims (9)

A bearing inspection device comprising: a platform for horizontally placing a bearing to be inspected and in a ring shape; a lighting device disposed at a center of the platform, the bearing surrounding the platform is mounted on the platform; The illumination device provides a horizontal radial light source to illuminate the inner ring surface of the bearing; an image capture device is located above the platform for capturing the illuminated image of the bearing from directly above the bearing; and an image processing device Connecting the image capturing device, the image processing device obtains characteristic values of the plurality of objects on the surface of the inner ring of the bearing from the image, and determines whether the number of parts of the bearing is correct according to the characteristic value of the objects, wherein The feature value of the object is the area value of each object; the image processing device calculates the number of parts according to the area value of each object in the image conforming to a preset standard range. The bearing inspection device according to claim 1, wherein the image processing device performs binarization processing on the image. The bearing inspection device of claim 1, wherein the image processing device performs a noise filtering process on the image, wherein the noise filtering process scans the image to find a bearing contour. And the inner circle, and in the image, the area other than the outer circle and the area inside the inner circle are excluded or blackened. The bearing inspection device of claim 1, wherein the image processing device first positions the angular orientations of the plurality of fixed objects according to the characteristic values in the image, and then determines the fixing according to the angular orientation of the fixed objects. Several non-solid objects The preset orientation of the object is finally determined according to whether there is a corresponding non-fixed object in the preset orientation of the non-fixed object, and the missing position of the part on the bearing is known. The bearing inspection device of claim 1, wherein the image capturing device has a lens facing the center of the bearing. The bearing inspection device of claim 5, wherein the illumination device has a casing and a lamp, the lamp is disposed inside the casing, and a top surface of the casing is provided with an area larger than the top surface. Sun visor. The bearing inspection device of claim 6, wherein the housing has a light transmitting upper half and a non-transmissive lower half; the light transmitting upper half is between the top surface and the non-light transmitting Between the lower half; the luminaire is a tungsten lamp. The bearing inspection device of claim 1, further comprising a hood body covering the platform, wherein the illuminating device, the image capturing device and the image processing device are located in the opaque Inside the cover. The bearing inspection device of claim 1, wherein the platform is provided with a plurality of positioning seats arranged at intervals around the lighting device to jointly support the bearing to be inspected.