Detection system for bearing of conveyor and method for detecting bearing

Abstract

A detection system for bearings of a transfer apparatus comprising bearings mounted on a roller, an angle marker disposed on an inner race of each bearing and / or on an axial side end of the roller, an identity marker disposed on the transfer apparatus adjacent to each bearing, the detection system comprising: a photographing and identification subsystem comprising a first device and a second device, the first device captures a first image of the marker at a first position and recognizes a first angle and identity information from the first image, and the second device captures a second image of the marker at a second position and recognizes a second angle and identity information from the second image, the offset distance of the second position from the first position corresponds to the distance required by the bearing inner ring to rotate by a first preset angle; and a controller that calculates whether a difference between the first angle and the second angle of the bearing having the same identity information is equal to a first predetermined angle based on receiving the first angle and the identity information from the first device and receiving the second angle and the identity information from the second device.

Description

Technical Field

[0001] The present disclosure relates to a detection system for a bearing of a conveying device and a method for detecting a bearing of the conveying device. Background Art

[0002] Conveying equipment is currently widely used in the field of manufacturing. For example, in the field of automobile assembly, after the whole vehicle is assembled, the assembled vehicle is usually placed on a conveying device (such as a chain plate conveying device) for transportation. During the transportation process, the operator adds auxiliary media such as antifreeze required for the finished vehicle or performs various necessary tests on the vehicle before it goes offline.

[0003] Depending on the length of the production line, the conveying equipment may usually use up to several thousand bearings to carry the conveying rollers of the conveying equipment. During the use of the conveying equipment, it is inevitable that there will be bearings that fail due to accidents such as collisions or aging of parts in such a large number of bearings. The most common failure is the jamming or jamming of the bearings. Jammed or jammed bearings will reduce the efficiency of the conveying equipment or produce unexpected noise. In conventional production lines, operators usually regularly inspect all bearings to determine the status of each bearing and replace the failed bearings. However, due to the large number of bearings and the inspection process requires operators to manually turn each bearing and observe whether the bearing is jammed or jammed, the traditional inspection process requires a lot of time and manpower. For example, for conveying equipment using thousands of bearings, it is often necessary for operators to spend about two weeks or even longer to inspect all bearings. In addition, since the inspection process is very time-consuming, in actual production, only an inspection frequency of, for example, once a year or once every six months can be arranged, which makes it impossible to grasp the status of the bearings in the conveying equipment in real time, and thus the bearing may fail during the interval between two inspections and affect production. Summary of the invention

[0004] The present disclosure aims to provide a detection system and method for bearings, which allow efficient and automatic detection of each bearing in a conveying device during the production process without the aid of manpower, and enable the status of each bearing to be grasped in real time, so as to allow the corresponding bearing to be replaced in time when the bearing becomes stuck or jammed.

[0005] According to a first aspect of the present disclosure, there is provided a bearing detection system for a conveying device, the conveying device comprising at least one bearing mounted on a roller and moving along a conveying direction, an angle marker being arranged on the inner ring of each of the at least one bearing and / or on the axial side end of the roller on which the bearing is mounted, and an identity marker being arranged on the conveying device adjacent to each of the at least one bearing, characterized in that the detection system comprises: a photographic and recognition subsystem, the photographic and recognition subsystem comprising: a first photographic and recognition device and a second photographic and recognition device, the first photographic and recognition device being configured to be triggered when the bearing moves to the first position along the conveying direction and to capture a first image of the angle marker and the identity marker in the first position, and to recognize a first position of the bearing from the first image. Angle and identity information, the second camera and identification device is configured to be triggered when the bearing moves to the second position along the conveying direction and capture a second image of the angle marker and the identity marker at the second position, and identify the second angle and identity information of the bearing from the second image, wherein the second position is arranged downstream of the first position along the conveying direction, and the distance by which the second position is offset from the first position corresponds to the distance required for the inner ring of the bearing to rotate a first predetermined angle; and a controller, the controller calculates whether the difference between the first angle and the second angle of the bearing having the same identity information is equal to a first predetermined angle based on receiving the first angle and identity information from the first camera and identification device and receiving the second angle and identity information from the second camera and identification device.

[0006] In one embodiment, the photographic and identification subsystem also includes a third photographic and identification device arranged in a third detection area along the conveying direction, the third photographic and identification device captures a third image of the angle marker and the identity marker in a third position and identifies a third angle of the bearing from the third image, wherein the distance at which the third position is offset downstream from the second position along the conveying direction corresponds to the distance required for the bearing to rotate by a second predetermined angle, wherein the controller receives the third angle from the third photographic and identification device and calculates the difference between the first angle and the third angle.

[0007] In one embodiment, the detection system also includes a trigger subsystem, which is arranged adjacent to the photographing and identification subsystem and includes: a first trigger device, which triggers and causes the first photographing and identification device to capture the first image when the bearing moves to the first position along the conveying direction, and a second trigger device, which triggers and causes the second photographing and identification device to capture the second image when the bearing moves to the second position along the conveying direction.

[0008] In one embodiment, when the bearing moves to the second position along the conveying direction, the second trigger device triggers and causes the third photographing and identifying device to capture the third image after a period of time, wherein the period of time corresponds to the time required for the bearing to rotate the second predetermined angle.

[0009] In one embodiment, the trigger subsystem further comprises a third trigger device, which triggers the third camera and recognition device to capture the third image when the bearing moves to the third position along the conveying direction.

[0010] In one embodiment, it is characterized in that each trigger device, when triggered, directly sends a signal to the corresponding camera and recognition device to instruct taking a picture.

[0011] In one embodiment, it is characterized in that the controller also communicates with the trigger subsystem, and each trigger device sends a signal to the controller when triggered, and the controller sends another signal to the corresponding camera and recognition device to instruct shooting.

[0012] In one embodiment, the controller binds the identity information, the calculation result between the first angle and the second angle to the bearing and stores it to an external device.

[0013] In one embodiment, the controller binds the identity information, the calculation result between the first angle and the second angle, and the calculation result between the first angle and the third angle to the bearing and stores them in an external device.

[0014] In one embodiment, the first predetermined angle is 180 degrees.

[0015] In one embodiment, the second predetermined angle is 180 degrees.

[0016] According to a second aspect of the present disclosure, a method for detecting bearings of a conveying device is also provided, wherein the conveying device includes at least one bearing mounted on a roller and moving along a conveying direction, an angle marker is arranged on the inner ring of each of the at least one bearing and / or the axial side end of the roller on which the bearing is mounted, and an identity marker is arranged on the conveying device adjacent to each of the at least one bearing, and the method is characterized in that the method includes the following steps: a first photographing and identifying device is triggered when the bearing reaches a first position along the conveying direction; the first photographing and identifying device captures a first image of the angle marker and the identity marker at the first position; the first photographing and identifying device identifies a first angle and identity information of the bearing from the first image, and sends the first angle and identity information to a controller; when the bearing moves along the conveying direction, the first photographing and identifying device captures a first image of the angle marker and the identity marker at the first position; the first photographing and identifying device identifies a first angle and identity information of the bearing from the first image, and sends the first angle and identity information to a controller; When the conveying direction reaches a second position, the second photographic and recognition device is triggered, wherein the second position is arranged downstream of the first position along the conveying direction, and the distance by which the second position is offset from the first position corresponds to the distance required for the inner ring of the bearing to rotate a first predetermined angle; the second photographic and recognition device captures a second image of the angle marker and the identity marker at the second position; the second photographic and recognition device recognizes the second angle and identity information of the bearing from the second image, and sends the second angle and identity information to the controller; the controller calculates the difference between the first angle and the second angle after confirming that the identity information recognized from the first image and the second image is the same, and if the difference is equal to the first predetermined angle, the bearing is determined to be qualified; if the difference is less than the first predetermined angle, the bearing is determined to be unqualified.

[0017] In one embodiment, the method further comprises the step of: a first trigger device is triggered when the bearing reaches a first position along the conveying direction and a first camera and recognition device is triggered by the first trigger device.

[0018] In one embodiment, the first predetermined angle is 180 degrees.

[0019] According to a third aspect of the present disclosure, there is also provided a method for detecting bearings of a conveying device, wherein the conveying device comprises at least one bearing mounted on a roller and moving along a conveying direction, an angle marker being arranged on the inner ring of each of the at least one bearing and / or the axial side end of the roller on which the bearing is mounted, and an identity marker being arranged on the conveying device adjacent to each of the at least one bearing, characterized in that the method comprises the following steps: triggering a first photographing and identifying device when the bearing reaches a first position along the conveying direction; the first photographing and identifying device photographing a first image of the angle marker and the identity marker at the first position; the first photographing and identifying device identifying a first angle and identity information of the bearing from the first image, and sending the first angle and identity information to a controller; a second photographing and identifying device and a third photographing and identifying device being triggered when the bearing reaches a second position along the conveying direction, wherein the second position is arranged downstream of the first position along the conveying direction, and the distance by which the second position is offset from the first position corresponds to the distance required for the inner ring of the bearing to rotate by a first predetermined angle; the second photographing and identifying device photographing a second image of the angle marker and the identity marker at the second position, and the third photographing and identifying device photographing a second image of the angle marker and the identity marker at the second position after a period of time; a third image of the angle marker and the identity marker at three positions, wherein the third position is arranged downstream of the second position along the conveying direction, and the distance by which the third position is offset from the second position corresponds to the distance required for the inner ring of the bearing to rotate by a second predetermined angle, wherein the time period corresponds to the time required for the bearing to rotate by the second predetermined angle; a second photographing and identifying device identifies the second angle and identity information of the bearing from the second image, and sends the second angle and identity information to a controller; a third photographing and identifying device identifies the third angle and identity information of the bearing from the third image, and sends the third angle and identity information to the controller; the controller calculates a first difference between the first angle and the second angle after confirming that the identity information identified from the first image and the second image is the same, and if the first difference is less than the first predetermined angle, the bearing is determined to be unqualified; if the first difference is equal to the first predetermined angle, the following steps are performed: the controller calculates a second difference between the first angle and the third angle after confirming that the identity information identified from the first image and the third image is the same, and if the second difference is equal to the sum of the first predetermined angle and the second predetermined angle, the bearing is determined to be qualified; if the second difference is less than the sum of the first predetermined angle and the second predetermined angle, the bearing is determined to need further inspection.

[0020] In one embodiment, the method further includes the following steps: a first trigger device is triggered when the bearing reaches a first position along the conveying direction, and a first photographic and identification device is triggered by the first trigger device; and a second trigger device is triggered when the bearing reaches a second position along the conveying direction, and a second photographic and identification device and a third photographic and identification device are triggered by the second trigger device (22).

[0021] In one embodiment, the first predetermined angle is 180 degrees and the second predetermined angle is 180 degrees. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The present disclosure will be more easily understood by the following detailed description in conjunction with the accompanying drawings, in which the same reference numerals represent the same elements. The accompanying drawings are schematic and non-restrictive. The elements in the accompanying drawings are not necessarily represented to scale, for example, the elements may be enlarged for the purpose of illustration, or may be reduced in proportion to keep the drawings clear and easy to understand.

[0023] In the attached picture:

[0024] Figure 1 A schematic diagram showing a first embodiment of a detection system for a bearing according to the present disclosure is shown;

[0025] Figure 2 A schematic diagram of a second embodiment of a detection system for a bearing according to the present disclosure is shown. DETAILED DESCRIPTION

[0026] The present disclosure will be described below with reference to the accompanying drawings, wherein the accompanying drawings illustrate several embodiments of the present disclosure. However, it should be understood that the present disclosure can be presented in a variety of different ways and is not limited to the embodiments described below; in fact, the embodiments described below are intended to make the disclosure of the present disclosure more complete and fully illustrate the scope of protection of the present disclosure to those skilled in the art. It should also be understood that the embodiments disclosed herein can be combined in various ways to provide more additional embodiments.

[0027] It should be understood that the same reference numerals represent the same elements throughout the drawings. In the drawings, the dimensions of certain features may be distorted for clarity.

[0028] It should be understood that the terms used in the specification are only used to describe specific embodiments and are not intended to limit the present disclosure. All terms (including technical terms and scientific terms) used in the specification have the meanings commonly understood by those skilled in the art unless otherwise defined. For the sake of simplicity and / or clarity, well-known functions or structures may not be described in detail.

[0029] The singular forms "a", "the" and "the" used in the specification include the plural forms unless clearly indicated. The terms "include", "comprise" and "contain" used in the specification indicate the presence of the claimed features, but do not exclude the presence of one or more other features. The term "and / or" used in the specification includes any and all combinations of one or more of the relevant listed items. The terms "between X and Y" and "between approximately X and Y" used in the specification should be interpreted as including X and Y. The term "between approximately X and Y" used in this specification means "between approximately X and approximately Y", and the term "from approximately X to Y" used in this specification means "from approximately X to approximately Y".

[0030] In the specification, when an element is said to be "on", "attached", "connected", "coupled", or "contacting" another element, the element may be directly on, attached, connected, coupled, or contacting another element, or there may be an intermediate element. In contrast, when an element is said to be "directly" "on", "directly attached", "directly connected", "directly coupled", or "directly contacting" another element, there will be no intermediate element. In the specification, a feature is arranged "adjacent" to another feature, which may refer to a feature having a portion that overlaps with an adjacent feature or a portion that is located above or below an adjacent feature.

[0031] In the specification, spatial relational terms such as "upper", "lower", "left", "right", "front", "back", "higher", "lower", etc. may describe the relationship of one feature to another feature in the drawings. It should be understood that the spatial relational terms include different orientations of the device in use or operation in addition to the orientation shown in the drawings. For example, when the device in the drawings is turned over, features previously described as being "below" other features may now be described as being "above" the other features. The device may also be oriented in other ways (rotated 90 degrees or in other orientations), and the relative spatial relationships will be interpreted accordingly.

[0032] refer to Figure 1 , which shows a schematic diagram of a first embodiment of a detection system 100 for a bearing according to the present disclosure. First, observe Figure 1 2, which shows a portion of a side plate 200 of a conveying device and one of the bearings 1, viewed from the side. The inner ring of the bearing 1 is mounted to one of the rollers 2 of the conveying device, whereby the bearing 1 supports the conveying device, for example Figure 1Schematically shown is a portion of the upper chain plate 300 of the conveying device. During the operation of the conveying device, the inner ring of the bearing 1 rotates together with the roller 2, and there is no relative rotation between the inner ring of the bearing 1 and the roller 2.

[0033] An angle marker 3 can be provided on the roller 2 of the conveyor. The angle marker 3 also rotates with the roller 2 and thus also with the inner ring of the bearing 1. The angle marker 3 serves to indicate the angle of rotation of the bearing 1. Figure 1 In the embodiment of the invention, the angle marker 3 is in the form of a clamping piece clamped to the end of the roller, the clamping piece having a protrusion extending in the radial direction of the bearing. It will be understood by those skilled in the art that the angle marker 3 may be any device or apparatus that can indicate the angle of rotation of the bearing 1, and the device or apparatus may also be mounted to the bearing alternatively.

[0034] The identification marker 4 is disposed on the portion of the chain plate 300 of the conveying device and is adjacent to the bearing 1. The identification marker 4 is used to record and represent the identification information of the bearing 1, such as the identification number of the bearing 1. The identification marker 4 can be a barcode, a QR code, or other mark that can be recognized by an image.

[0035] The bearing 1, the roller 2, the angle marker 3 and the identity marker 4 are Figure 1 The left half of FIG. 5 is shown in a first position 51 along the conveying direction of the conveying device. Figure 1 As shown in FIG. 1 , during the operation of the conveying device, the bearing 1, the roller 2, the angle marker 3 and the identity marker 4 together with the portion of the side plate 200 of the conveying device and the portion of the chain plate 300 move downstream along the conveying direction indicated by the arrow 30 and reach the Figure 1 The second position 52 is shown in the middle right half.

[0036] The first position 51 and the second position 52 are configured such that the distance between the first position 51 and the second position 52 along the conveying direction is equal to the distance of half a revolution of the bearing 1. In other words, the distance between the first position 51 and the second position 52 along the conveying direction is equal to half the distance of a full revolution (360 degrees) of the bearing 1.

[0037] Although only one of the bearings 1 used in the conveying device is shown in the drawings, it is understood by those skilled in the art that the conveying device also has a plurality of other bearings and corresponding rollers, angle markers and identity markers along the conveying direction. The description of the bearing 1, roller 2, angle marker 3 and identity marker 4 herein is also applicable to the other bearings and corresponding rollers, angle markers and identity markers.

[0038] The detection system 100 for a bearing according to the present disclosure includes a photographing and identifying subsystem, a trigger subsystem, and a controller (not shown).

[0039] The camera and identification subsystem is arranged beside the conveying device. The camera and identification subsystem is used to take images of the angle marker 3 and the identity marker 4 and identify the angle and identity information of the bearing 1 from the images. The camera and identification subsystem includes a first camera and identification device 11 and a second camera and identification device 12.

[0040] The first camera and recognition device 11 is arranged in the first detection area 31 along the conveying direction. The first camera and recognition device 11 points to the first position 51 and can capture a first image of the bearing 1, the roller 2, the angle marker 3 and the identity marker 4 in the first position 51. The first camera and recognition device 11 can recognize the first angle of the bearing 1 at the first position 51 from the state of the angle marker 3 in the first image. The first camera and recognition device 11 can also recognize the identity information representing the bearing 1 from the identity marker 4 in the first image. The first camera and recognition device 11 sends the recognized first angle and identity information of the bearing 1 to the controller of the detection system 100.

[0041] The second camera and recognition device 12 is arranged in the second inspection area 32 located downstream along the conveying direction. The second camera and recognition device 12 points to the second position 52 and can capture a second image of the bearing 1, the roller 2, the angle marker 3 and the identity marker 4 in the second position 52. The second camera and recognition device 12 can recognize the second angle of the bearing 1 at the second position 52 from the state of the angle marker 3 in the second image. The second camera and recognition device 12 can also recognize the identity information representing the bearing 1 from the identity marker 4 in the second image. The second camera and recognition device 12 sends the recognized second angle and identity information of the bearing 1 to the controller of the inspection system 100.

[0042] The trigger subsystem is arranged in the same area adjacent to the photography and identification subsystems. The trigger subsystem is used to trigger and send a signal when the bearing 1 reaches a specified position to indicate that the bearing is in place. The trigger device includes a first trigger device 21 and a second trigger device 22. In the embodiment, the trigger subsystem is in the form of a trigger sensor, but it can be understood that the trigger device can also be any other device that can trigger and send a signal.

[0043] The first trigger device 21 is arranged in the first detection area 31 adjacent to the first camera and recognition device 11. When the bearing 1 moves to the first position 51 along the conveying direction, the first trigger device 21 is triggered and sends a signal to instruct the first camera and recognition device 11 to capture the first image.

[0044] The second trigger device 22 is arranged in the second detection area 33 adjacent to the second camera and recognition device 12. When the bearing 1 moves to the second position 52 along the conveying direction indicated by the arrow 30, the second trigger device 22 is triggered and sends a signal to instruct the second camera and recognition device 12 to capture the second image.

[0045] The controller of the detection system 100 communicates with the camera and recognition subsystem and the trigger subsystem to receive and transmit control signals and information.

[0046] The controller receives the identity information and the first angle of the bearing 1 from the first camera and recognition device 11, and receives the identity information and the second angle of the bearing 1 from the second camera and recognition device 12. After the controller confirms that the identity information received twice is the same, the controller calculates the difference between the first angle and the second angle.

[0047] Because the first position 51 and the second position 52 are configured such that the distance by which the first position 51 and the second position 52 are offset in the conveying direction is equal to the distance of half a rotation of the bearing 1, the bearing 1 should rotate about 180 degrees when the bearing 1 moves from the first position 51 to the second position 52 in the conveying direction. Since the angle marker 3 rotates together with the bearing 1, the difference between the first angle identified from the angle marker 3 in the first position 51 in the first image and the second angle identified from the angle marker 3 in the second position 52 in the second image should also be about 180 degrees. In consideration of the allowable sliding movement of the bearing and the manufacturing tolerance, for a qualified bearing, the difference between the first angle and the second angle should also be at least 180±5 degrees.

[0048] When the controller calculates that the difference between the first angle and the second angle is equal to 180±5 degrees, it can be considered that the bearing 1 does not have a serious sticking problem, and the controller determines that the state of the bearing 1 is qualified; when the controller calculates that the difference between the first angle and the second angle is less than the lower limit of 180±5 degrees (i.e. 175 degrees), it can be considered that the bearing 1 has a serious sticking problem, and the controller determines that the state of the bearing 1 is unqualified.

[0049] The controller can then bind the determined state information of bearing 1 with the identity information of bearing 1 and send and store it to an external computing device or storage device. The external computing device or storage device can record and summarize the information of all bearings received, so that the operator can query or collect statistics on the state of all bearings of the transmission device.

[0050] In an embodiment, the detection system 100 may be configured to send a signal to the controller when the corresponding trigger device is triggered. The controller that receives the signal then sends another signal to the corresponding camera and recognition device to instruct the corresponding camera and recognition device to take a picture. However, it can be understood by those skilled in the art that the detection system 100 may also be configured to directly send a signal to the corresponding camera and recognition device to instruct the camera and recognition device to take a picture when the corresponding trigger device is triggered.

[0051] refer to Figure 2 , which shows a second embodiment of a detection system 100 for a bearing according to the present disclosure. In the second embodiment, the same arrangements and components as those of the first embodiment are shown with the same reference numerals and are not described in detail again.

[0052] exist Figure 2 In the embodiment, the bearing 1, the roller 2, the angle marker 3 and the identity marker 4 are connected to the part of the side plate 200 of the conveying device and the part of the chain plate 300. Figure 2 The first position 51 shown in the leftmost part of the figure starts to move downstream along the conveying direction shown by the arrow 30 and reaches Figure 2 The second position 52 shown in the middle part, and then continues to move further downstream in the conveying direction and reaches Figure 2 The third position 53 is shown in the rightmost part.

[0053] The first position 51 and the second position 52 are configured such that the distance that the first position 51 is offset from the second position 52 along the conveying direction is equal to the distance that the bearing 1 rotates half a circle, and the third position 53 and the second position 52 are also configured such that the distance that the third position 53 is offset from the second position 52 along the conveying direction is equal to the distance that the bearing 1 rotates half a circle. In other words, the distance between the first position 51 and the third position 53 along the conveying direction is equal to the distance that the bearing 1 rotates one full circle (360 degrees).

[0054] In the second embodiment, the photographing and identifying subsystem further includes a third photographing and identifying device 13 .

[0055] The third camera and recognition device 13 is arranged in the third detection area 33 further downstream along the conveying direction. The third camera and recognition device 13 points to the third position 53 and can take a third image of the bearing 1, the roller 2, the angle marker 3 and the identity marker 4 in the third position 53. The third camera and recognition device 12 can recognize the third angle of the bearing 1 when it is in the third position 53 from the state of the angle marker 3 in the third image. The third camera and recognition device 13 can also recognize the identity information representing the bearing 1 from the identity marker 4 in the third image. The third camera and recognition device 13 sends the recognized third angle and identity information of the bearing 1 to the controller of the detection system 100.

[0056] In the second embodiment, when the bearing 1 moves to the second position 52, the second trigger device 22 is triggered and sends out a first signal and a second signal. The first signal is used to instruct the second camera and recognition device 12 to capture the second image. The second signal is used to instruct the third camera and recognition device 13 to capture the third image after a period of time. The period of time corresponds to the time required for the bearing 1 to rotate half a circle. Since the third position 53 and the second position 52 are configured so that the distance between the third position 53 and the second position 52 along the conveying direction is equal to the distance of the bearing 1 rotating half a circle, the second signal can instruct the third camera and recognition device 13 to start capturing the third image when the bearing 1 just moves to the third position 53.

[0057] As in the first embodiment, the controller receives the identity information and the first angle of the bearing 1 from the first camera and recognition device 11, and receives the identity information and the second angle of the bearing 1 from the second camera and recognition device 12. In the second embodiment, the controller also receives the identity information and the third angle of the bearing 1 from the third camera and recognition device 13 in addition.

[0058] Similar to the first embodiment, after the difference between the first angle and the second angle calculated by the controller is less than 175 degrees, it can be considered that the bearing 1 has a serious seizure problem, and the controller determines that the state of the bearing 1 is unqualified. However, the difference between the second embodiment and the first embodiment is that after the difference between the first angle and the second angle calculated by the controller is equal to 180±5 degrees, the controller will further calculate the difference between the first angle and the third angle.

[0059] Because the distance between the first position 51 and the third position 53 along the conveying direction is equal to the distance of a full rotation (360 degrees) of the bearing 1, the bearing 1 should rotate about 360 degrees when it moves from the first position 51 to the third position 53 along the conveying direction. Since the angle marker 3 rotates with the bearing 1, the difference between the first angle identified from the angle marker 3 at the first position 51 in the first image and the third angle identified from the angle marker 3 at the third position 53 in the third image should also be about 360 degrees. In consideration of the allowable sliding movement of the bearing and the manufacturing tolerance, for a qualified bearing, the difference between the first angle and the third angle should also be at least 360±10 degrees.

[0060] In actual production, the bearing may only have a minor sticking problem due to slight wear of the ball or the entry of fine impurities. In this case, the bearing may be within the qualified range of 180±5 degrees after half a turn, but may be less than the lower limit of 360±10 degrees (i.e. 350 degrees) after another half turn. In this case, it is impossible to directly judge that the bearing is unqualified, and the operator needs to manually test the bearing to determine whether the bearing needs to be replaced.

[0061] In the second embodiment, when the controller calculates that the difference between the first angle and the third angle is equal to 360±10 degrees, it can be considered that the bearing 1 does not have any sticking problem, and the controller determines that the state of the bearing 1 is qualified; and when the controller calculates that the difference between the first angle and the third angle is less than 350 degrees, it can be considered that the bearing 1 has a slight sticking problem, and the controller determines that the state of the bearing 1 requires further inspection.

[0062] Although in the second embodiment, the second trigger device 22 sends a signal to instruct the third camera and recognition device 13 to capture the third image after a period of time, it is understood by those skilled in the art that the trigger subsystem may alternatively include a third trigger device, wherein the third trigger device is arranged in the third detection area 33 adjacent to the third camera and recognition device 13. When the bearing 1 moves to the first position 53 along the conveying direction, the third trigger device is triggered and sends a signal to instruct the third camera and recognition device 13 to capture the third image.

[0063] In addition, alternatively, the trigger subsystem may also only include the first trigger device 21. In this case, the first trigger device 21 is triggered and sends out a first signal, a second signal and a third signal. The first signal is used to instruct the first camera and recognition device 11 to capture the first image; the second signal is used to instruct the second camera and recognition device 12 to capture the second image after a time period corresponding to the time required for the bearing 1 to rotate half a circle; and the third signal is used to instruct the third camera and recognition device 13 to capture the third image after another time period corresponding to the time required for the bearing 1 to rotate another half a circle.

[0064] In addition, it can be understood by those skilled in the art that the detection of the bearing rotating 180° and 360° and the offset distance between the third position, the second position and the first position in the first embodiment and the second embodiment are only exemplary. According to actual needs, it can be detected whether the bearing rotates to other specific angles, and the offset distance can be set to the distance required for the corresponding bearing to rotate to other specific angles. For example, the first position 51, the second position 52, and the third position 53 can be configured so that the distance offset between the third position 53 and the second position 52 and the second position 52 and the first position 51 along the transmission direction are equal to the distance of the bearing 1 rotating one-third of a circle (i.e., the bearing rotates 120°), the time period of the second signal emitted by the second trigger device corresponds to the time required for the bearing to rotate one-third of a circle, and the controller is used to calculate whether the difference between the first angle and the second angle is equal to 120 degrees, and calculate whether the difference between the first angle and the third angle is equal to 240 degrees.

[0065] A first method for detecting a bearing according to the present disclosure comprises the following steps:

[0066] The first trigger device 21 is triggered when the bearing 1 reaches the first position 51 along the conveying direction of the conveying device;

[0067] The first trigger device 21 causes the first camera and recognition device 11 to capture a first image of the angle marker 3 and the identity marker 4 in the first position 51;

[0068] The first photographing and identifying device 11 identifies the first angle and identity information of the bearing 1 from the first image, and sends the first angle and identity information to the controller;

[0069] triggering the second trigger device 22 when the bearing 1 reaches the second position 52 along the conveying direction, wherein the second position 52 is offset downstream from the first position 51 along the conveying direction by a distance corresponding to the distance required for the bearing 1 to rotate by the first predetermined angle;

[0070] The second trigger device 22 causes the second camera and recognition device 12 to capture a second image of the angle marker 3 and the identity marker 4 in the second position 52;

[0071] The second camera and recognition device 12 recognizes the second angle and identity information of the bearing 1 from the second image, and sends the second angle and identity information to the controller;

[0072] After confirming that the identity information recognized from the first image and the second image is the same, the controller calculates the difference between the first angle and the second angle. If the difference is equal to the first predetermined angle, the bearing is determined to be qualified; if the difference is less than the first predetermined angle, the bearing is determined to be unqualified.

[0073] A second method for detecting a bearing according to the present disclosure comprises the following steps:

[0074] The first trigger device 21 is triggered when the bearing 1 reaches the first position 51 along the conveying direction;

[0075] The first trigger device 21 causes the first camera and recognition device 11 to capture a first image of the angle marker 3 and the identity marker 4 in the first position 51;

[0076] The first photographing and identifying device 11 identifies the first angle and identity information of the bearing 1 from the first image, and sends the first angle and identity information to the controller;

[0077] The second trigger device 22 is triggered when the bearing 1 reaches the second position 52 along the conveying direction, wherein the distance of the second position 52 offset downstream from the first position 51 along the conveying direction corresponds to the distance required for the bearing 1 to rotate the first predetermined angle;

[0078] The second trigger device 22 causes the second camera and recognition device 12 to capture a second image of the angle marker 3 and the identity marker 4 at the second position 52, and causes the third camera and recognition device 13 to capture a third image of the angle marker 3 and the identity marker 4 at the third position 53 after a period of time, wherein the distance of the third position 53 offset downstream from the second position 52 along the conveying direction corresponds to the distance required for the bearing 1 to rotate by the second predetermined angle, wherein the period of time corresponds to the time required for the bearing 1 to rotate by the second predetermined angle;

[0079] The second camera and recognition device 12 recognizes the second angle and identity information of the bearing 1 from the second image, and sends the second angle and identity information to the controller;

[0080] The third camera and recognition device 13 recognizes the third angle and identity information of the bearing 1 from the third image, and sends the third angle and identity information to the controller

[0081] After confirming that the identity information recognized from the first image and the second image are the same, the controller calculates the difference between the first angle and the second angle. If the difference is less than the first predetermined angle, the bearing is determined to be unqualified; if the difference is equal to the first predetermined angle, the following steps are further performed: After confirming that the identity information recognized from the first image and the third image are the same, the controller calculates the difference between the first angle and the third angle. If the difference between the first angle and the third angle is equal to the sum of the first predetermined angle and the second predetermined angle, the bearing is determined to be qualified; if the difference between the first angle and the third angle is less than the sum of the first predetermined angle and the second predetermined angle, it is determined that the bearing needs further inspection.

[0082] The detection system for bearings and the method for detecting bearings according to the present disclosure allow for real-time and automatic detection and recording of the status of all bearings during the operation of the conveying equipment, and the operator can determine whether the bearings are stuck or jammed based on the detection records.

[0083] Although the exemplary embodiments of the present disclosure have been described, it should be understood by those skilled in the art that various changes and modifications can be made to the exemplary embodiments of the present disclosure without departing from the spirit and scope of the present disclosure in essence. Therefore, all changes and modifications are included in the scope of protection of the present disclosure as defined by the claims. The present disclosure is defined by the appended claims, and the equivalents of these claims are also included.

Claims

1. A bearing detection system (100) for a conveying device, the conveying device comprising at least one bearing (1) mounted on a roller (2) and moving in a conveying direction, an angle marker (3) being arranged on the inner ring of each of the at least one bearing (1) and / or on the axial side end of the roller on which the bearing is mounted, and an identity marker (4) being arranged adjacent to each of the at least one bearing (1) on the conveying device, characterized in that: The detection system (100) comprises: A camera and recognition subsystem, the camera and recognition subsystem comprising: A first photographing and identifying device (11), wherein the first photographing and identifying device (11) is configured such that when the bearing (1) moves to the first position (51) along the conveying direction The angle marker (3) is triggered and photographed when in the first position (51). and a first image of the identification marker (4), and identifying the bearing (1) from the first image The first angle and identity information, and a second photographing and identifying device (12), the second photographing and identifying device (12) being configured to be triggered when the bearing (1) moves to the second position (52) along the conveying direction and to capture a second image of the angle marker (3) and the identity marker (4) at the second position (52), and to identify a second angle and identity information of the bearing (1) from the second image, wherein the second position (52) is arranged downstream of the first position (51) along the conveying direction, and the distance by which the second position (52) is offset from the first position (51) corresponds to a distance required for the inner ring of the bearing (1) to rotate by a first predetermined angle; and A controller, which calculates whether the difference between the first angle and the second angle of the bearing having the same identity information is equal to a first predetermined angle based on receiving the first angle and identity information from the first camera and recognition device (11) and receiving the second angle and identity information from the second camera and recognition device (12).

2. The bearing detection system (100) for transmission equipment according to claim 1, characterized in that: The camera and identification subsystem also includes a third camera and identification device (13) arranged in a third detection area (33) along the conveying direction, the third camera and identification device (13) captures a third image of the angle marker (3) and the identity marker (4) in a third position (53) and identifies a third angle of the bearing (1) from the third image, wherein the distance by which the third position (53) is offset downstream from the second position (52) along the conveying direction corresponds to the distance required for the bearing (1) to rotate a second predetermined angle, wherein the controller receives the third angle from the third camera and identification device (11) and calculates the difference between the first angle and the third angle.

3. The bearing detection system (100) for transmission equipment according to claim 2, characterized in that: The detection system (100) further comprises a trigger subsystem, which is arranged adjacent to the photographing and identifying subsystem and comprises: a first trigger device (21) which triggers the first camera and recognition device (11) to capture the first image when the bearing (1) moves to the first position (51) along the conveying direction, and A second trigger device (22) is configured to trigger the second camera and recognition device (12) to capture the second image when the bearing (1) moves to the second position (52) along the conveying direction.

4. The bearing detection system (100) for transmission equipment according to claim 3, characterized in that: When the bearing (1) moves to the second position (52) along the conveying direction, the second trigger device (22) triggers and causes the third photographing and identifying device (12) to capture the third image after a period of time, wherein the period of time corresponds to the time required for the bearing (1) to rotate by the second predetermined angle; alternatively, the trigger subsystem further includes a third trigger device, which triggers and causes the third photographing and identifying device (13) to capture the third image when the bearing (1) moves to the third position (53) along the conveying direction.

5. The detection system (100) for bearings of transmission equipment according to any one of claims 1 to 4, characterized in that: When each trigger device is triggered, it directly sends a signal to the corresponding camera and recognition device to instruct it to take pictures; or, the controller also communicates with the trigger subsystem, and when each trigger device is triggered, it sends a signal to the controller, and the controller sends another signal to the corresponding camera and recognition device to instruct it to take pictures; or, the first predetermined angle is 180 degrees.

6. The detection system (100) for bearings of transmission equipment according to claim 1, characterized in that: The controller binds the identity information, the calculation result between the first angle and the second angle to the bearing (1) and stores it in an external device.

7. The detection system (100) for bearings of transmission equipment according to any one of claims 2 to 4, characterized in that: The controller binds the identity information, the calculation result between the first angle and the second angle, and the calculation result between the first angle and the third angle to the bearing (1) and stores them in an external device; or, the second predetermined angle is 180 degrees.

8. A method for detecting bearings of a conveying device, the conveying device comprising at least one bearing (1) mounted on a roller (2) and moving in a conveying direction, an angle marker (3) being arranged on the inner ring of each of the at least one bearing and / or the axial side end of the roller on which the bearing is mounted, and an identity marker (4) being arranged on the conveying device adjacent to each of the at least one bearing (1), characterized in that: The method comprises the following steps: The first camera and recognition device (11) is triggered when the bearing (1) reaches a first position (51) along the conveying direction; A first photographing and identifying device (11) captures a first image of the angle marker (3) and the identity marker (4) at the first position (51); A first photographing and identifying device (11) identifies a first angle and identity information of the bearing (1) from the first image, and sends the first angle and identity information to a controller; The second camera and recognition device (12) is triggered when the bearing (1) reaches a second position (52) along the conveying direction, wherein the second position (52) is arranged downstream of the first position (51) along the conveying direction, and the distance by which the second position (52) is offset from the first position (51) corresponds to the distance required for the inner ring of the bearing (1) to rotate by a first predetermined angle; The second camera and identification device (12) captures a second image of the angle marker (3) and the identity marker (4) at the second position (52); A second photographing and identifying device (12) identifies a second angle and identity information of the bearing (1) from the second image, and sends the second angle and identity information to a controller; After confirming that the identity information recognized from the first image and the second image is the same, the controller calculates the difference between the first angle and the second angle. If the difference is equal to the first predetermined angle, the bearing is determined to be qualified; if the difference is less than the first predetermined angle, the bearing is determined to be unqualified.

9. The method for detecting bearings of a conveying device according to claim 8, characterized in that: The method further comprises the following steps: when the bearing (1) reaches a first position (51) along the conveying direction, a first trigger device (21) is triggered and a first photographic and identification device (11) is triggered by the first trigger device (21); and / or, the first predetermined angle is 180 degrees.

10. A method for detecting bearings of a conveying device, the conveying device comprising at least one bearing (1) mounted on a roller (2) and moving in a conveying direction, an angle marker (3) being arranged on the inner ring of each of the at least one bearing and / or the axial side end of the roller on which the bearing is mounted, and an identity marker (4) being arranged on the conveying device adjacent to each of the at least one bearing (1), characterized in that: The method comprises the following steps: triggering a first photographing and identifying device (11) when the bearing (1) reaches a first position (51) along the conveying direction; A first photographing and identifying device (11) captures a first image of the angle marker (3) and the identity marker (4) at the first position (51); A first photographing and identifying device (11) identifies a first angle and identity information of the bearing (1) from the first image, and sends the first angle and identity information to a controller; The second camera and recognition device (12) and the third camera and recognition device (13) are triggered when the bearing (1) reaches a second position (52) along the conveying direction, wherein the second position (52) is arranged downstream of the first position (51) along the conveying direction, and the second position (52) is offset from the first position (51) by a distance corresponding to the distance required for the inner ring of the bearing (1) to rotate by a first predetermined angle; The second camera and recognition device (12) captures a second image of the angle marker (3) and the identity marker (4) at the second position (52), and the third camera and recognition device (13) captures a third image of the angle marker (3) and the identity marker (4) at a third position (53) after a period of time, wherein the third position (53) is arranged downstream of the second position (52) along the conveying direction, and the distance by which the third position (53) is offset from the second position (52) corresponds to the distance required for the inner ring of the bearing (1) to rotate by a second predetermined angle, wherein the period of time corresponds to the time required for the bearing (1) to rotate by the second predetermined angle; A second photographing and identifying device (12) identifies a second angle and identity information of the bearing (1) from the second image, and sends the second angle and identity information to a controller; The third camera and identification device (13) identifies the third angle and identity information of the bearing (1) from the third image, and sends the third angle and identity information to the controller The controller calculates a first difference between the first angle and the second angle after confirming that the identity information recognized from the first image and the second image is the same, and if the first difference is less than the first predetermined angle, determines that the bearing is unqualified; if the first difference is equal to the first predetermined angle, performs the following steps: After confirming that the identity information recognized from the first image and the third image is the same, the controller calculates the second difference between the first angle and the third angle. If the second difference is equal to the sum of the first predetermined angle and the second predetermined angle, the bearing is determined to be qualified; if the second difference is less than the sum of the first predetermined angle and the second predetermined angle, it is determined that the bearing needs further inspection.

11. The method for detecting bearings of a conveying device according to claim 10, characterized in that: The method further comprises the following steps: When the bearing (1) reaches a first position (51) along the conveying direction, the first trigger device (21) is triggered, and the first camera and recognition device (11) is triggered by the first trigger device (21); and When the bearing (1) reaches the second position (52) along the conveying direction, the second trigger device (22) is triggered, and the second camera and identification device (12) and the third camera and identification device (13) are triggered by the second trigger device (22); And / or, in the method, the first predetermined angle is 180 degrees, and the second predetermined angle is 180 degrees.

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