Video generation device, video generation method, and program

Abstract

To improve convenience in observing a behavior and a state of a component of a roller bearing.SOLUTION: There is provided a moving image generation device, which has: extracting means for extracting a plurality of frames from moving image data generated by photographing a roller bearing; specifying means for specifying the center of rotation of the roller bearing included in a plurality of frames respectively; deriving means for deriving an angle of revolution on the center of rotation of a rolling body constituting the roller bearing in each of the plurality of frames; rotating means for rotating each of the plurality of frames by the angle of revolution reversely of the rotating direction that the angle of revolution derived by the deriving means indicates; and generating means for using the plurality of frames having been rotated by the rotating means to generate moving image data.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a moving image generating device, a moving image generating method, and a program. [Background technology]

[0002] Conventionally, when observing the behavior of each component part of a rolling bearing while it is in operation, a video taken by a camera is used. For example, Patent Document 1 discloses that a ball bearing illuminated with light from a ring light is photographed multiple times, and the slippage of the ball is calculated based on the orbital speed of the components of the ball bearing obtained from the images. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2013-140018 A Summary of the Invention [Problem to be solved by the invention]

[0004] There is a demand from the industry to observe the behavior of the cage of a rotating bearing in order to estimate the force generated in the cage. If the behavior of the cage can be observed, not only can the phenomenon be understood but also an appropriate model can be constructed, which can be used for simulations, etc. However, it is not easy to observe the behavior of something that is rotating, and various ideas have been devised so far. In the above-mentioned Patent Document 1, it is possible to observe the behavior of the rolling elements, but it is not possible to observe the behavior of the cage.

[0005] In view of the above problems, an object of the present invention is to improve the convenience of observing the behavior of components of a rolling bearing. [Means for solving the problem]

[0006] In order to solve the above problems, the present invention has the following configuration. That is, a moving image generating device, An extraction means for extracting a plurality of frames from video data of a rolling bearing; an identification means for identifying a rotation center of the rolling bearing included in each of the plurality of frames; a deriving means for deriving an angle of revolution about the rotation center of a rolling element constituting the rolling bearing in each of the plurality of frames; a rotation means for rotating each of the plurality of frames by the revolution angle in a direction opposite to a rotation direction indicated by the revolution angle derived by the derivation means; a generating means for generating video data using the plurality of frames rotated by the rotating means; has.

[0007] Another aspect of the present invention has the following configuration. That is, a moving image generating method, An extraction step of extracting a plurality of frames from video data of a rolling bearing; an identifying step of identifying a rotation center of the rolling bearing included in each of the plurality of frames; a deriving step of deriving an orbital angle around the rotation center of a rolling element constituting the rolling bearing in each of the plurality of frames; a rotating step of rotating each of the plurality of frames by an orbital angle in a direction opposite to a rotation direction indicated by the orbital angle derived in the derivation step; a generating step of generating video data using the plurality of frames rotated in the rotating step; has.

[0008] Another aspect of the present invention has the following configuration: On the computer, An extraction step of extracting a plurality of frames from video data of a rolling bearing; an identifying step of identifying a rotation center of the rolling bearing included in each of the plurality of frames; a deriving step of deriving an orbital angle around the rotation center of a rolling element constituting the rolling bearing in each of the plurality of frames; a rotating step of rotating each of the plurality of frames by an orbital angle in a direction opposite to a rotation direction indicated by the orbital angle derived in the derivation step; a generating step of generating video data using the plurality of frames rotated in the rotating step; Execute the command. Effect of the Invention

[0009] The present invention makes it possible to improve the convenience when observing the behavior of components of a rolling bearing. [Brief description of the drawings]

[0010] [Figure 1] FIG. 1 is a schematic diagram showing an example of an apparatus configuration according to an embodiment of the present invention. [Diagram 2] FIG. 2 is a diagram for explaining the arrangement of a rolling bearing according to an embodiment of the present invention at the time of photographing. [Diagram 3] 10A and 10B are diagrams for explaining different positions at the time of photographing the rolling bearing according to the embodiment of the present invention. [Figure 4] 1A and 1B are diagrams illustrating rotation of a rolling bearing according to an embodiment of the present invention. [Diagram 5] 3A and 3B are diagrams for explaining translational movement of a rolling bearing according to an embodiment of the present invention. [Figure 6] 4 is a flowchart of a moving image generating process according to an embodiment of the present invention. [Figure 7] FIG. 11 is a diagram showing a display example after mask processing according to an embodiment of the present invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0011] Hereinafter, the embodiment for carrying out the present invention will be described with reference to the drawings. Note that the embodiment described below is one embodiment for explaining the present invention, and is not intended to be interpreted as limiting the present invention, and all configurations described in each embodiment are not necessarily essential configurations for solving the problems of the present invention. In addition, in each drawing, the same components are given the same reference numbers to indicate their correspondence.

[0012] <First embodiment> A first embodiment of the present invention will be described below.

[0013] [Device configuration] FIG. 1 is a schematic diagram showing an example of the overall configuration of the system according to the present embodiment. FIG. 1 shows a rolling bearing 101 to be observed, a photographing device 106, a lighting device 107, and a video generating device 200. In this embodiment, a ball bearing is taken as an example of the rolling bearing 101 to be observed, but the present invention is not limited to this. As long as the component to be observed appears in the image when photographed by the photographing device 106, rolling bearings of other configurations such as a self-aligning roller bearing, a tapered roller bearing, and a cylindrical roller bearing may be observed. In FIG. 1, one rolling bearing 101 is taken as the observation target for the sake of simplicity, but photographing may be performed so that multiple rolling bearings 101 are included in the photographing range (angle of view) of the photographing device 106.

[0014] The rolling bearing 101 includes an inner ring 104, which is a rotating ring fitted on the outside of a rotating shaft, an outer ring 102, which is a fixed ring fitted inside a housing, a plurality of balls (rollers) which are a plurality of rolling elements 103 arranged between the inner ring 104 and the outer ring 102, and a retainer 105 which holds the rolling elements 103 so that they can roll. Here, a configuration in which the outer ring 102 is fixed in the rolling bearing 101 will be described as an example, but a configuration in which the inner ring 104 is fixed may also be used. In addition, the guide type of the retainer 105 is not particularly limited, and may be any of an outer ring guide, an inner ring guide, and a rolling element guide. In addition, in the rolling bearing 101, friction between the inner ring 104 and the rolling elements 103 and between the outer ring 102 and the rolling elements 103 is reduced by a predetermined lubrication method. The lubrication method is not particularly limited, but for example, grease lubrication or oil lubrication may be used, and the type of lubricant is not particularly limited.

[0015] The imaging device 106 includes a camera for imaging the rolling bearing 101. The imaging device 106 is capable of capturing high-speed video corresponding to the rotational movement of the rolling bearing 101. The lighting device 107 irradiates light onto the rolling bearing 101 when the imaging device 106 images the rolling bearing 101. Here, a ring light will be used as an example of the lighting device 107.

[0016] The video generating device 200 may be realized by an information processing device including a control device, a storage device, and an output device, all of which are not shown. The control device may be composed of a central processing unit (CPU), a micro processing unit (MPU), a digital single processor (DSP), or a dedicated circuit. The storage device is composed of volatile and non-volatile storage media such as a hard disk drive (HDD), a read only memory (ROM), or a random access memory (RAM), and is capable of inputting and outputting various information in response to an instruction from the control device. The output device is composed of a speaker, a light, or a display device such as a liquid crystal display, and performs output to a user in response to an instruction from the control device. Although the output method by the output device is not particularly limited, in this embodiment, the generated video data is reproduced. The output device may be a network interface equipped with a communication function, and may perform an output operation by transmitting data to an external device (not shown) via a network (not shown).

[0017] The video generating device 200 includes a shooting control unit 201, a lighting control unit 202, an image processing unit 203, a video generating unit 204, an information storage unit 205, and an output processing unit 206. Each part may be realized by the above-mentioned control device reading out a corresponding program from a storage device and executing it. Furthermore, various output operations may be performed by the control device controlling an output device.

[0018] The photographing control unit 201 controls the photographing device 106 to photograph a moving image of the rolling bearing 101. The photographing control unit 201 may be configured to set various parameters for photographing based on a user's instruction or automatically. The photographing control unit 201 also acquires the moving image photographed by the photographing device 106. The lighting control unit 202 controls the lighting operation by the lighting device 107 when photographing by the photographing device 106. The image processing unit 203 performs image processing on the moving image photographed by the photographing device 106. The moving image generating unit 204 generates a moving image using the image processed by the image processing unit 203. The information storage unit 205 stores various information such as the moving image photographed by the photographing device 106 and the moving image generated by the moving image generating unit 204. The output processing unit 206 performs output processing of the moving image.

[0019] 1, the video generating device 200 is connected to the photographing device 106 and the lighting device 107, but the present invention is not limited to this. For example, the video generating device 200 may acquire a video of the rolling bearing 101 photographed by the photographing device 106 at any timing via a network (not shown) or the like. In this case, the photographing control unit 201 and the lighting control unit 202 may be omitted, but the video generating device 200 also acquires information at the time of photographing.

[0020] [photograph] FIG. 2 is a diagram for explaining an example of the arrangement when the rolling bearing 101 is photographed by the imaging device 106 according to the present embodiment. Here, an example is shown in which the optical axis OA of the imaging device 106 coincides with the rotation axis RA of the rolling bearing 101. The direction parallel to the rotation axis RA is the Z-axis direction. In addition, in a three-dimensional space, the X-axis, the Y-axis, and the Z-axis are mutually perpendicular. The center of the illumination device 107, which is a ring illumination, is located on the optical axis OA and is not included in the angle of view A of the imaging device 106. The ring illumination can be arranged so as not to be included in the angle of view A of the imaging device 106, and has the advantage that light can be irradiated so that the entire rolling bearing 101 has a uniform illuminance. At least the inner diameter portion 102a of the outer ring 102 is entirely included in the angle of view A of the imaging device 106. It is more preferable that the outer diameter portion 102b of the outer ring 102 is entirely included in the angle of view A.

[0021] FIG. 3 is a diagram for explaining another example of the arrangement when the rolling bearing 101 is photographed by the imaging device 106 according to this embodiment. FIG. 3 shows an example in which a spot light from a single light source is used as the illumination device 107 instead of the ring light. Here, in order to make the amount of light (brightness) irradiated to the observation surface of the rolling bearing 101 approximately constant, the axis passing through the center of the illumination device 107 and the rotation axis RA of the rolling bearing 101 are parallel (coincident). FIG. 3(a) shows an example in which the rotation axis RA and the optical axis OA are not parallel. Even in this case, at least the inner diameter portion 102a of the outer ring 102 is entirely included in the angle of view A of the imaging device 106. It is more preferable that the outer diameter portion 102b of the outer ring 102 is entirely included in the angle of view A. FIG. 3(b) shows an example in which the rotation axis RA and the optical axis OA are parallel but not coincident. Even in this case, at least the entire inner diameter portion 102a of the outer ring 102 is included in the angle of view A of the imaging device 106. It is more preferable that the entire outer diameter portion 102b of the outer ring 102 is included in the angle of view A.

[0022] [rotate] FIG. 4 is a diagram for explaining the rotational operation of the rolling bearing 101 according to this embodiment. FIG. 4 shows an example of an image of the rolling bearing 101 shown in each of two frames among a plurality of frames (still images) extracted from a video captured by the imaging device 106. The axial direction shown in FIG. 4 corresponds to FIG. 3. In FIG. 4, the center of rotation RC of the rolling bearing 101 corresponds to the center of the outer ring 102, which is the fixed side. Here, for ease of explanation, one of the plurality of rolling elements 103 is shown as a reference rolling element 103r. At this time, when the state of FIG. 4(a) is transitioned to the state of FIG. 4(b), the rotation angle of the rolling bearing 101, i.e., the revolution angle of the rolling element 103, becomes β.

[0023] The calculation of the revolution angle β of the rolling element 103 in this embodiment will be described. First, in this embodiment, it is preferable that the shooting speed (fps: frames per second) of a plurality of frames (still images) constituting a video captured by the imaging device 106 and the rotation speed of the rolling bearing 101 to be observed satisfy the following relationship. PS≧n … (1) PS: Shooting speed [fps] n: Rotation speed [min -1 ] The relationship shown in the above formula (1) is just one example, and for example, a formula showing a different relationship may be used depending on the object to be observed in the rolling bearing 101 (for example, a rolling element or a lubricant).

[0024] Then, the revolution angle β can be calculated from a predetermined formula based on the rotation speed of the cage 105, which is a component of the rolling bearing 101, and shooting information of the video.

[0025] Alternatively, instead of a method of deriving the revolution angle β from a predetermined calculation formula, a revolution angle that is the difference between a frame of interest and a frame immediately before the frame may be derived. Specifically, the image is captured at a frame rate that is greater than the value obtained by multiplying the number of rotations per second of the inner ring 104, which is a rotating ring, by the total number of the rolling bodies 103. Then, the position where the reference rolling body 103r existed in the immediately previous frame (for example, the frame shown in FIG. 4(a)) is used as a reference, and the nearest rolling body 103 in the rotation direction (counterclockwise in the example of FIG. 4) in the next frame (for example, the frame shown in FIG. 4(b)) is specified as the reference rolling body 103r. This allows the movement of the reference rolling body 103r between frames to be specified, and the revolution angle β with respect to the center of rotation to be derived.

[0026] Transform FIG. 5 is a diagram for explaining the translation of the rolling bearing 101 according to this embodiment. In a certain frame extracted from a video captured by the imaging device 106, an image of the rolling bearing 101 is included at a center position P. The center of the display screen 501 is set as a center position DC. In order to facilitate observation of the rolling bearing 101, the center position P, which is the center of rotation of the rolling bearing 101 included in the frame, is moved to the center position DC of the display screen 501. In the example of FIG. 5, when the lower left is the origin, the upward direction of the X axis is set as the + direction, and the rightward direction of the Y axis is set as the + direction, the rolling bearing 101 is moved +Dx in the X axis direction and +Dy in the Y axis direction. In this example, the destination of the center position P of the rolling bearing 101 is set as the center position DC of the display screen 501, but this is not limited to this. For example, a configuration may be used in which the user can set any position (coordinates) as the destination. Furthermore, in the case where a plurality of rolling bearings 101 are included in the frame, the configuration may be such that the destination of each of the rotation centers RC can be set.

[0027] [Processing flow] Fig. 6 is a flowchart of the moving image generating process according to this embodiment. This process is executed by the moving image generating device 200, and is realized, for example, by a control device (not shown) included in the moving image generating device 200 reading from a storage device and executing a program for implementing each part shown in Fig. 1. Here, to simplify the explanation, the processing subject will be collectively described as the moving image generating device 200.

[0028] In S601, the moving image generating device 200 acquires moving image data of the rolling bearing 101 to be observed from the photographing device 106. At this time, the moving image generating device 200 also acquires the specifications of the rolling bearing 101, the operating conditions at the time of photographing, the photographing settings, and the like. Note that the configuration may be such that the specification information of the rolling bearing 101, and the like, is input by the user via a setting screen (not shown) or the like.

[0029] In S602, the moving image generating device 200 sets a frame rate for extracting frames (still images) from the moving image data acquired in S601. The frame rate for extracting frames may be set to an arbitrary value by the user, or may be set automatically by the moving image generating device 200. At this time, the shooting speed at which the moving image data acquired in S601 was shot is set as the upper limit.

[0030] In S603, the moving image production device 200 extracts a plurality of frames (still images) from the moving image data acquired in S601, based on the frame rate set in S602.

[0031] In S604, the moving image generating device 200 sets the center position of the moving image to be generated. Specifically, the center position here corresponds to the center position DC shown in Fig. 5, and may be a coordinate on the display screen.

[0032] In S605, the moving image production device 200 focuses on the first frame from among the multiple frames extracted in S603. At this time, the time when this frame was shot is also obtained and set as the reference time.

[0033] In S606, the video generating device 200 identifies the area of ​​the rolling bearing included in the frame focused on in S605 (hereinafter referred to as the frame of interest), and identifies its center position (center of rotation). The method of identification here is not particularly limited, but for example, the center position may be identified by pattern matching between the shape of the rolling bearing 101 defined based on the specifications of the rolling bearing 101 acquired in S601 and the shape in the image. Alternatively, the center of a rotating shaft (not shown) supported by the inner ring 104 may be identified, and the center position of the rolling bearing 101 may be identified based on the center position. Also, as shown in FIG. 3, if correction (keystone correction, etc.) of the shape of the rolling bearing 101 included in the frame of interest is required depending on the positional relationship between the position of the rolling bearing 101 at the time of shooting and the position of the shooting device 106, the center position may be identified after the correction process. The center position here may be the center of the fixed side or the center of the rotating side, but the center of the fixed side is more preferable. In this embodiment, as described above, the outer ring 102 is fixed, and the center of the outer ring 102 is used as the central position.

[0034] In S607, the moving image generating device 200 moves the center of rotation identified in S606 to the center position set in S604. Specifically, the center of rotation is moved as shown in FIG.

[0035] In S608, the video generating device 200 performs a mask process on the frame of interest. The type of mask process here is not particularly limited, and may be, for example, a process of painting areas other than the area of ​​the rolling bearing 101 with a different color. Specifically, a configuration may be used in which any image processing is performed on the background area other than the area of ​​the rolling bearing 101. Alternatively, a process may be performed in which the areas of the parts that make up the rolling bearing 101 (for example, the rolling elements, the cage, the outer ring, etc.) are identified, and areas other than the part of interest are painted in. The part of interest here may be determined based on an instruction from the user.

[0036] 7 shows an example of a display screen 501 that is displayed when video data is played back as a result of the masking process. Here, a state is shown in which everything other than the rolling elements 103 and the cage 105 has been masked. Note that the display here is just one example, and other screen configurations and display methods may be used.

[0037] In S609, the moving image production device 200 stores the frame of interest in the information storage unit 205.

[0038] In S610, the next unprocessed frame is selected from among the multiple frames extracted in S603, and the time when this frame was captured is also obtained.

[0039] In S611, the video production device 200 identifies the area of ​​the rolling bearing 101 included in the frame focused on in S610, and identifies its center position (center of rotation). The method of identification here is the same as in the process of S606. Furthermore, if a correction process was performed in S606, the same correction process is performed.

[0040] In S612, the moving image generating device 200 moves the center of rotation identified in S611 to the center position set in S604. Specifically, the center of rotation is moved as shown in FIG.

[0041] In S613, the moving image generating device 200 calculates the revolution angle β of the rolling body 103. In this embodiment, the revolution angle β is calculated based on a calculation formula defined in advance on the basis of the number of rotations and shooting information (frame rate) of the moving image as described above.

[0042] In S614, the moving image production device 200 rotates the frame of interest about the center position by an amount opposite to the rotation direction of the revolution angle β calculated in S613 (ie, −β).

[0043] In S615, the moving image production device 200 performs mask processing on the frame of interest. The type of mask processing here is the same as that performed in S608.

[0044] In S616, the moving image production device 200 stores the frame of interest in the information storage unit 205.

[0045] In S617, moving image creation device 200 determines whether or not there are any unprocessed frames among the multiple frames extracted in S603. If there are any unprocessed frames (YES in S617), the process returns to S610, and moving image creation device 200 repeats the process. On the other hand, if the process has been completed for all frames (NO in S617), the process of moving image creation device 200 proceeds to S618.

[0046] In S618, the moving image production device 200 generates moving image data using the multiple frames stored in the information storage unit 205. That is, moving image data is generated at the frame rate set in S602. Then, this processing flow ends.

[0047] The video data generated by the above process is a video in which the rolling elements 103 are in a substantially constant position. In other words, a video is played in which the rolling elements and the cage appear to be substantially stationary. By playing back and observing this video data, the user can easily grasp the behavior and state of each part of the rolling bearing 101 being observed. In this case, the user can easily observe not only the rolling elements, but also the behavior and state of each component of the rolling bearing 101, such as the cage 105, thereby improving the convenience of observing the behavior of the components.

[0048] <Second embodiment> A second embodiment of the present invention will be described below. Note that a description of configurations that overlap with the first embodiment will be omitted, and the description will focus on the differences.

[0049] In the first embodiment, the revolution angle β of the rolling element 103 is calculated using a calculation formula defined in advance based on the rotation speed and video shooting information (frame rate). However, the revolution angle may be configured to be derived from information included in the image. In this embodiment, the revolution angle of the rolling element 103 is derived based on the rotation of the cage 105 around the inner ring 104. In other words, since the rotation of the cage 105 around the inner ring 104 and the revolution of the rolling element 103 around the inner ring are linked, the revolution angle is derived based on this.

[0050] The cage 105 according to this embodiment has a portion that serves as an encoder (not shown) that can be observed when a video is taken. As the rolling bearing 101 rotates, the cage 105 rotates clockwise or counterclockwise. As the cage 105 rotates, the position of the encoder also changes, making it possible to identify the rotation state. In this embodiment, the position of the encoder is identified from the frame to derive the rotation angle of the cage 105, that is, the revolution angle of the rolling body 103. The configuration and shape of the encoder are not particularly limited, but for example, a reflective mark may be provided on the cage 105, making it possible to make the encoder observable.

[0051] As in the first embodiment, the rotation speed of the rolling bearing 101 and the shooting speed of the video data can be identified, and these are used to derive the rotation state of the cage 105. For example, the start point of measurement using the video and the start point of rotation of the rolling bearing 101 may be synchronized, and the frame rate may be set so that multiple frames can be extracted at intervals until the cage 105 makes one rotation, thereby identifying the rotation state of the cage 105.

[0052] Then, a video is generated in the same manner as in the first embodiment, using the revolution angle of the rolling elements 103 derived based on the identified rotation angle of the cage 105. This makes it possible to easily grasp the state of each portion of the rolling bearing 101 that is the observation target, in the same manner as in the first embodiment.

[0053] <Third embodiment> A third embodiment of the present invention will be described below. Note that a description of configurations that overlap with the first embodiment will be omitted, and the description will focus on the differences.

[0054] In the first embodiment, the revolution angle β of the rolling element 103 is calculated using a calculation formula defined in advance based on the number of rotations and video shooting information (frame rate). In this case, the actual rotation state does not necessarily match the revolution angle β obtained from the calculation formula. Therefore, in this embodiment, adjustment of the revolution angle β will be described.

[0055] In the first embodiment, the revolution angle β was derived for each frame based on the first frame. In this embodiment, the revolution angle β corresponding to each frame can be adjusted. The output processing unit 206 plays the generated video data based on a user instruction. Furthermore, the output processing unit 206 displays each frame (still image) and the corresponding revolution angle β on a UI (User Interface) screen. This UI screen is configured to allow the user to issue a correction instruction for the revolution angle β for each frame.

[0056] For example, the adjustment value for the revolution angle β may be adjustable within the range of 0≦β≦360. For example, if the rolling body 103 is visually recognized as not moving (revolving) on ​​the generated video data, the revolution angle β has been calculated appropriately. On the other hand, if the rolling body 103 is visually recognized as moving (revolving) clockwise or counterclockwise on the generated video data, a difference has occurred between the calculated revolution angle β and the actual rotation state. Therefore, the value of the revolution angle β is adjusted so that the rolling body 103 appears stationary.

[0057] As described above, in addition to the effects of the first embodiment, this embodiment makes it possible to adjust the video data to be more convenient even when there is a discrepancy between the actual rotation state and the calculated revolution angle β.

[0058] <Other embodiments> In addition, the present invention can also be realized by supplying a program or application for realizing the functions of one or more of the above-mentioned embodiments to a system or device via a network or a storage medium, etc., and having one or more processors in a computer of the system or device read and execute the program.

[0059] Moreover, it may be realized by a circuit that realizes one or more functions (for example, an application specific integrated circuit (ASIC) or a field programmable gate array (FPGA)).

[0060] As such, the present invention is not limited to the above-described embodiments, and the present invention also contemplates the mutual combination of the various components of the embodiments, as well as modifications and applications by those skilled in the art based on the description in the specification and well-known techniques, and these are included in the scope of protection sought.

[0061] As described above, the present specification discloses the following: (1) An extraction means (e.g., 203) for extracting a plurality of frames from video data of a rolling bearing (e.g., 101); Identification means (e.g., 203) for identifying the rotation center of the rolling bearing included in each of the plurality of frames; In each of the plurality of frames, a deriving means (e.g., 203) for deriving an angle of revolution about the rotation center of a rolling element (e.g., 103) constituting the rolling bearing; A rotation means (e.g., 203) that rotates each of the plurality of frames by the revolution angle in a direction opposite to a rotation direction indicated by the revolution angle derived by the derivation means; A generating means (e.g., 204) for generating video data using the plurality of frames rotated by the rotating means; A moving image generating device (e.g., 200) comprising: This configuration improves the convenience of observing the behavior of components of the rolling bearing, for example, the behavior of the cage, which is a component of the rolling bearing, and the state of the lubricating oil located around the cage.

[0062] (2) a setting means (e.g., 203) for setting a center position of the moving image data generated by the generating means; a moving means (e.g., 203) for translating the rotation center identified by the identifying means to the center position set by the setting means in each of the plurality of frames; The moving image generating device according to (1), further comprising: With this configuration, regardless of the center position of the rolling bearing in the captured video data, video data can be generated in which the rolling bearing has been moved to a position that makes observation easier, thereby improving convenience when observing the behavior of the rolling bearing.

[0063] (3) The moving image generating device according to (1) or (2), wherein the extraction means sets a frame rate of the frames to be extracted based on the shooting speed of the moving image data and the rotation speed of the rolling bearing. According to this configuration, it is possible to extract frames at an appropriate frame rate according to the shooting speed of the captured video data and the rotation speed of the rolling bearing.

[0064] (4) The video generation device according to any one of (1) to (3), wherein the derivation means derives the revolution angle based on specifications of the rolling bearing, operating conditions, and shooting conditions of the video data. According to this configuration, the theoretical value of the revolution angle can be derived from the specifications of the rolling bearing, the operating conditions, and the shooting conditions of the video data. Therefore, the revolution angle can be derived with reduced processing load.

[0065] (5) The moving image generating device according to (4), further comprising a display means for displaying the revolution angle derived by the derivation means in an adjustable manner for each of the plurality of frames. According to this configuration, it becomes easy to adjust the derived revolution angle to the theoretical value, and convenience during observation is improved.

[0066] (6) The video generation device according to any one of (1) to (3), wherein the derivation means derives the revolution angle based on a rotation about a center of rotation of a cage constituting the rolling bearing, the rotation being determined by an encoder provided in the rolling bearing. According to this configuration, the revolution angle can be derived according to the position of the cage identified from the frame (still image).

[0067] (7) The video generation device according to any one of (1) to (6), wherein the identifying means identifies the center of rotation based on the position of a fixed side of an outer ring and an inner ring that constitute the rolling bearing. According to this configuration, since the center of rotation is identified based on the position of the fixed side, it is possible to stably identify the center of rotation.

[0068] (8) an instruction means (e.g., 203) for receiving an instruction for a portion to which a mask process is to be applied among the portions constituting the rolling bearing; A processing means (e.g., 203) for performing a masking process on the region of the part designated by the designation means for each of the plurality of frames; The moving image generating device according to any one of (1) to (7), further comprising: According to this configuration, it is possible to easily observe only any position on the rolling bearing, thereby improving convenience during observation.

[0069] (9) An extraction step (e.g., S603) of extracting a plurality of frames from video data of a rolling bearing (e.g., 101); A step (e.g., S607) of identifying a rotation center of the rolling bearing included in each of the plurality of frames; A deriving step (e.g., S613) of deriving an orbital angle of a rolling element (e.g., 103) constituting the rolling bearing about the rotation center in each of the plurality of frames; A rotation step (e.g., S614) of rotating each of the plurality of frames by the revolution angle in a direction opposite to a rotation direction indicated by the revolution angle derived in the derivation step; A generating step (e.g., S618) of generating video data using the plurality of frames rotated in the rotating step; A moving image generating method comprising the steps of: This configuration improves the convenience of observing the behavior of components of the rolling bearing, for example, the behavior of the cage, which is a component of the rolling bearing, and the state of the lubricating oil located around the cage.

[0070] (10) a computer (e.g., 200), An extraction step (e.g., S603) of extracting a plurality of frames from video data of a rolling bearing (e.g., 101); A step (e.g., S603) of identifying a rotation center of the rolling bearing included in each of the plurality of frames; A deriving step (e.g., S613) of deriving an orbital angle of a rolling element (e.g., 103) constituting the rolling bearing about the rotation center in each of the plurality of frames; A rotation step (e.g., S614) of rotating each of the plurality of frames by the revolution angle in a direction opposite to a rotation direction indicated by the revolution angle derived in the derivation step; A generating step (e.g., S618) of generating video data using the plurality of frames rotated in the rotating step; A program for executing the above. This configuration improves the convenience of observing the behavior of components of the rolling bearing, for example, the behavior of the cage, which is a component of the rolling bearing, and the state of the lubricating oil located around the cage. [Explanation of symbols]

[0071] 101...Roller bearing 102…Outer ring 103...Rolling element 104…Inner circle 105...Cage 200...Video generation device 201...imaging control unit 202...Lighting control unit 203...Image processing unit 204...Video generation section 205...Information storage section 206...Output processing unit

Claims

1. an extraction means for extracting a plurality of frames from video data obtained by photographing a rolling bearing from one side of a rotation shaft of the rolling bearing; an identification means for identifying a rotation center of the rolling bearing included in each of the plurality of frames; a deriving means for deriving an angle of revolution about the rotation center of a rolling element constituting the rolling bearing in each of the plurality of frames; a rotation means for rotating each of the plurality of frames by the revolution angle in a direction opposite to a rotation direction indicated by the revolution angle derived by the derivation means; a generating means for generating moving image data using the plurality of frames rotated by the rotating means.

2. a setting means for setting a center position of the moving image data generated by the generating means; a moving means for translating the rotation center identified by the identifying means to the center position set by the setting means in each of the plurality of frames; The moving image generating device according to claim 1 , further comprising:

3. 3. The moving image generating device according to claim 1, wherein the extraction means sets a frame rate of the frames to be extracted based on a shooting speed of the moving image data and a rotation speed of the rolling bearing.

4. 4. The video generating device according to claim 1, wherein the deriving means derives the revolution angle based on specifications of the rolling bearing, operating conditions, and shooting conditions of the video data.

5. 5. The video generating device according to claim 4, further comprising a display means for displaying the revolution angle derived by the derivation means so as to be adjustable for each of the plurality of frames.

6. The video generation device according to any one of claims 1 to 3, characterized in that the derivation means derives the revolution angle based on a rotation about the rotation center of a cage constituting the rolling bearing, which is identified by an encoder provided in the rolling bearing.

7. The video generation device according to any one of claims 1 to 6, characterized in that the identification means identifies the center of rotation based on the position of a fixed side of an outer ring and an inner ring that constitute the rolling bearing.

8. An instruction means for receiving an instruction for a portion to which a mask process is to be applied among portions constituting the rolling bearing; a processing means for performing a masking process on the region of the part designated by the designation means for each of the plurality of frames; The moving image generating device according to any one of claims 1 to 7, further comprising:

9. an extraction step of extracting a plurality of frames from video data obtained by photographing a rolling bearing from one side of a rotation axis of the rolling bearing; an identifying step of identifying a rotation center of the rolling bearing included in each of the plurality of frames; a deriving step of deriving an orbital angle around the rotation center of a rolling element constituting the rolling bearing in each of the plurality of frames; a rotating step of rotating each of the plurality of frames by an orbital angle in a direction opposite to a rotation direction indicated by the orbital angle derived in the derivation step; and generating video data using the plurality of frames rotated in the rotating step.

10. On the computer, an extraction step of extracting a plurality of frames from video data obtained by photographing a rolling bearing from one side of a rotation axis of the rolling bearing; an identifying step of identifying a rotation center of the rolling bearing included in each of the plurality of frames; a deriving step of deriving an orbital angle around the rotation center of a rolling element constituting the rolling bearing in each of the plurality of frames; a rotating step of rotating each of the plurality of frames by an orbital angle in a direction opposite to a rotation direction indicated by the orbital angle derived in the derivation step; and generating video data using the plurality of frames rotated in the rotating step.

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