WO2022239123A1 - 生産ライン監視装置、生産ライン監視システムおよび生産ライン監視方法 - Google Patents
生産ライン監視装置、生産ライン監視システムおよび生産ライン監視方法 Download PDFInfo
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- WO2022239123A1 WO2022239123A1 PCT/JP2021/017921 JP2021017921W WO2022239123A1 WO 2022239123 A1 WO2022239123 A1 WO 2022239123A1 JP 2021017921 W JP2021017921 W JP 2021017921W WO 2022239123 A1 WO2022239123 A1 WO 2022239123A1
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- production line
- abnormal state
- line monitoring
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- monitoring device
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- 238000004519 manufacturing process Methods 0.000 title claims abstract description 374
- 238000000034 method Methods 0.000 title claims abstract description 102
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B19/00—Programme-control systems
- G05B19/02—Programme-control systems electric
- G05B19/418—Total factory control, i.e. centrally controlling a plurality of machines, e.g. direct or distributed numerical control [DNC], flexible manufacturing systems [FMS], integrated manufacturing systems [IMS] or computer integrated manufacturing [CIM]
- G05B19/4184—Total factory control, i.e. centrally controlling a plurality of machines, e.g. direct or distributed numerical control [DNC], flexible manufacturing systems [FMS], integrated manufacturing systems [IMS] or computer integrated manufacturing [CIM] characterised by fault tolerance, reliability of production system
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B19/00—Programme-control systems
- G05B19/02—Programme-control systems electric
- G05B19/418—Total factory control, i.e. centrally controlling a plurality of machines, e.g. direct or distributed numerical control [DNC], flexible manufacturing systems [FMS], integrated manufacturing systems [IMS] or computer integrated manufacturing [CIM]
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B2219/00—Program-control systems
- G05B2219/30—Nc systems
- G05B2219/32—Operator till task planning
- G05B2219/32181—Monitor production, assembly apparatus with multiple sensors
Definitions
- the present disclosure relates to a production line monitoring device, a production line monitoring system, and a production line monitoring method for monitoring processes in a factory production line.
- Patent Document 1 discloses a process monitoring apparatus including a camera for detecting an abnormal state, a memory for storing photographed image data, and a display device for displaying the image of the image data recorded in the memory. disclosed. The user identifies the cause of the abnormal state of the process by displaying the image of the image data recorded in the memory.
- the present disclosure has been made in view of the above, and an object thereof is to obtain a production line monitoring device capable of promptly identifying the cause of an abnormal state without being limited to the individual imaging range of the imaging device. .
- FIG. 4 is a diagram showing an example of a display screen on the display unit of the production line monitoring device according to the first embodiment;
- FIG. 4 shows an FA system using the production line monitoring system according to the second embodiment;
- FIG. 11 is a block diagram showing the functional configuration of the sensor of the production line monitoring system according to the second embodiment;
- FIG. 2 is a block diagram showing the functional configuration of a production line monitoring device according to a second embodiment;
- FIG. 10 is a flow chart showing an example of a processing procedure when the production line monitoring system according to the second embodiment monitors the production line;
- FIG. 3 is a diagram showing a hardware configuration when the functions of the production line monitoring device according to the first embodiment and the production line monitoring device according to the second embodiment are realized by a computer system;
- FIG. 1 is a diagram showing an FA system 200 using a production line monitoring system 1 according to the first embodiment.
- the FA system 200 according to the first embodiment includes the production line monitoring system 1, a drive device 202 that is a control target device that is controlled to produce products on the production line, and a control device that controls the drive device 202.
- a control system comprising an FA controller 201 .
- An alarm is a signal indicating that a specific state, which is an expected event, has occurred in the production line, and is generated in the production line monitoring system 1 when an abnormal state occurs in the production line.
- Alarm information is alarm information that can identify the content of an alarm that has occurred on a production line, and is information that includes an alarm management number linked to the content of the alarm and the time at which the alarm occurred.
- the driving device 202 drives the belt conveyor 203 as shown in FIG.
- the belt conveyor 203 is composed of an endless conveyor belt 204, rollers 206 having roller shafts 205, and a motor which is a driving device 202. By rotating the roller shafts 205 using the motor, the conveyor belt 204 is rotated by the rollers 206. to convey the product 207 on the conveyor belt 204 .
- the axis mentioned above is the roller axis 205 .
- the production line monitoring system 1 is a system for monitoring processes in a factory production line, and includes a production line monitoring device 10 and a photographing device 11 .
- the production line monitoring system 1 photographs the operating state of the production process using the photographing device 11, and detects an abnormal state of the production process based on the photographed operating state of the production process.
- the photographing device 11 is a photographing unit that photographs the process state of the production line. That is, the photographing device 11 can be said to be a state detection unit that detects the state of the process of the production line.
- a plurality of cameras 111 that acquire overwritable video are used as the imaging device 11 .
- a plurality of cameras 111 are arranged at predetermined photographing positions different from each other around a belt conveyor 203 driven by a motor that is a driving device 202 in the FA system 200 so that the product 207 can be photographed.
- a sufficient number of cameras 111 are arranged to monitor any process desired to be monitored in a plurality of processes in the production line.
- a sufficient number of cameras 111 are arranged to monitor all the processes in the production line when it is desired to monitor all the processes.
- FIG. 3 is a schematic diagram showing an example of the cameras 111 arranged around the belt conveyor 203 in the first embodiment.
- the cameras 111 are arranged on opposite sides of the belt conveyor 203, which is the production line.
- Camera 111 - 1 , camera 111 - 3 and camera 111 - 5 are arranged on one side with respect to belt conveyor 203 .
- Camera 111 - 2 and camera 111 - 4 are arranged on the other side with respect to belt conveyor 203 . That is, even-numbered cameras 111-2 and 111-4 are opposite to odd-numbered cameras 111, cameras 111-1, 111-3 and 111-5 across the production line.
- the product 207 is photographed from the side.
- Each camera 111 is arranged at a position where the imaging range of each camera 111 does not overlap.
- FIG. 4 is a block diagram showing the functional configuration of the camera 111 of the production line monitoring system 1 according to the first embodiment.
- the camera 111 includes a camera imaging section 111a, a camera communication section 111b, and a camera control section 111c.
- the camera photographing unit 111a is a photographing function unit that performs photographing under the control of the camera control unit 111c.
- the camera imaging unit 111a can be said to be a state information acquisition unit that acquires the state of the process of the production line.
- the camera communication unit 111b performs two-way wireless communication with the production line monitoring device 10.
- the camera control unit 111c controls the entire camera 111 including the camera imaging unit 111a and the camera communication unit 111b.
- the camera control unit 111c controls the shutter speed and shutter timing of the camera 111 based on the scanning frequency stored in advance or the scanning frequency transmitted from the scanning frequency control unit 101a.
- FIG. 5 is a block diagram showing the functional configuration of the production line monitoring device 10 according to the first embodiment.
- the production line monitoring device 10 is a monitoring device for monitoring processes in a factory production line.
- the production line monitoring device 10 detects an abnormal state of the production process based on the operating state of the production process photographed using the photographing device 11 .
- the production line monitoring device 10 includes a monitoring control section 101 , a storage section 102 , a display section 103 , a monitoring communication section 104 and an input section 105 .
- the components of the production line monitoring device 10 can exchange video data and information with each other.
- the monitoring control unit 101 controls the production line monitoring device 10 as a whole.
- the monitoring control unit 101 also includes a scanning frequency control unit 101a, an abnormality detection processing unit 101b, an abnormality tracking processing unit 101c, a recording processing unit 101d, and a display instruction unit 101e.
- the components of the monitor control unit 101 can exchange video data and information with each other.
- the scanning frequency control unit 101a calculates an appropriate scanning frequency for collectively controlling the shutter speeds of the multiple cameras 111 and collectively controls the imaging timings of the multiple cameras 111 .
- the scanning frequency control unit 101 a receives, via the monitoring communication unit 104 , video data, which is video information of the production line process transmitted from the camera 111 .
- the scanning frequency control unit 101a uses image data transmitted from the camera 111 to calculate the moving speed of the production line by image processing, and calculates the scanning frequency from the calculated moving speed.
- the scanning frequency control unit 101 a transmits the calculated scanning frequencies to the cameras 111 to control the shutter speeds and shutter timings of the cameras 111 .
- the moving speed of the production line can be considered as the moving speed of the conveyor belt 204 or the rotational speed of the motor that is the driving device 202 .
- the scanning frequency control unit 101a stores information about the camera 111 selected in advance as one camera 111 to be subjected to calibration processing from among the plurality of cameras 111 .
- the scanning frequency control unit 101a obtains information necessary for calculating the scanning frequency, represented by the moving speed of the production line, from the video data transmitted from the camera 111 to be calibrated, and calculates the scanning frequency.
- the calibration process and the calculation of the scanning frequency will be described later.
- the scanning frequency is control information used by the camera 111 to control shutter speed and shutter timing.
- the scanning frequency control unit 101a transmits and feeds back the calculated scanning frequency to all the cameras 111, and updates the shutter speeds and shutter timings of all the cameras 111.
- the error in the time information of corresponding frames between the cameras 111 can be minimized. That is, all the cameras 111 update the shutter speed and shutter timing using the calculated scanning frequency, so that all the cameras 111 can shoot one frame at the same time. The same number of frames can be shot within a frame.
- the frame time information is information on the time when the frame was shot and is associated with the frame.
- the abnormality detection processing unit 101b compares information obtained by image-processing images captured by a plurality of cameras 111 with pre-stored information representing the normal state of the production line to determine whether the production line Detect abnormal conditions that occur.
- the information representing the normal state of the production line is video data of the process video of the production line when the production line is in the normal state.
- Abnormal states occurring on the production line include the state in which there is an abnormal state of parts on the production line that differs from the normal state by a predetermined threshold or more, and It includes the state of contamination with foreign matter that does not
- the abnormality detection processing unit 101b compares the images of the image data acquired from each camera 111 with the images of the image data representing the normal state of the production line stored in advance by machine learning or the like for all the cameras 111 . That is, the abnormality detection processing unit 101b compares the images captured by the cameras 111 with the images representing the normal state of the production line. If the image acquired from each camera 111 shows the product 207 or the situation of the production line that is determined to have a difference equal to or greater than a predetermined threshold as a result of the comparison, the abnormality detection processing unit 101b detects an abnormality that occurs in the production line. It is determined that an abnormal state has been detected, and an alarm is output. The abnormality detection processing unit 101 b transmits alarm information to the FA controller 201 via the monitoring communication unit 104 .
- the abnormality detection processing unit 101b sets the image transmitted from the camera 111 that captured the image in which the abnormal state of the production line was detected to prohibit overwriting of the image.
- the overwrite prohibition information is instructed to be stored in the storage unit 102 as a video that cannot be overwritten in a predetermined set period and as a video that cannot be overwritten without receiving an instruction from the user. It is information to do.
- the abnormality detection processing unit 101b performs image processing on the video in which the abnormal state of the production line is detected.
- the anomaly detection processing unit 101b transmits the image data of the image subjected to the image processing to the anomaly tracking processing unit 101c.
- the image processing performed on the video data of the video in which the abnormal state of the production line is detected is the addition of various information related to the abnormal state.
- Various types of information include a frame surrounding an abnormal portion in an abnormal state detected in the video.
- Various types of information include labeling information.
- the labeling information is information labeled with respect to each of a plurality of causes of abnormal conditions stored in advance in the abnormality detection processing unit 101b as candidates for causes of abnormal conditions.
- the various types of information include positional coordinate information in a frame in the video of the product 207 or the status of the production line, which is the cause of the determination of the abnormal state.
- the various types of information include positional coordinate information within the video frame of the portion that differs from the normal state.
- the abnormality tracking processing unit 101c detects the abnormal state using information on the detected abnormal state and images of the plurality of cameras 111. Perform image processing for tracking. Note that the video captured by the camera 111 may simply be called the video of the camera 111 .
- the anomaly tracking processing unit 101c compares images acquired from different cameras 111 and subjected to image processing by the anomaly detection processing unit 101b. Even if the abnormal state is reflected in the image, it is determined to be the same abnormal state. Then, the abnormality tracking processing unit 101c performs tracking processing of abnormal states occurring in the production line, and stores the processing results.
- the tracking processing of the abnormal state occurring in the production line is performed by analyzing the position information of the camera 111 that captured the image showing the abnormal state together with the time information of the frame of the image, thereby detecting the abnormal state occurring in the production line.
- This is a process of acquiring information on the trajectory of movement in time series, tracking the trajectory of movement of an abnormal state occurring in the production line, and connecting images.
- the positional information of the camera 111 is positional information unique to each camera 111 that can identify the position where each camera 111 is arranged.
- the tracking process can be rephrased as a process of tracking the temporal continuous movement of the state of the product or production line that caused the abnormal state in the images of the plurality of cameras 111 in which the abnormal state was detected.
- the predetermined condition is that, in the information added to the video data by the abnormality detection processing unit 101b, the positional coordinate information and labeling information within the frame of the image of the product or the state on the production line detected as being in an abnormal state are the same. and that the positions of the cameras 111 in which the abnormal state is detected in the captured video are adjacent in the movement direction of the production line, and the times at which the abnormal state is detected have continuity.
- the predetermined conditions are predetermined and stored in the abnormality tracking processing unit 101c.
- the abnormality tracking processing unit 101c uses the time information of the frame of the image of one camera 111 as a reference to continue the frames of the image of another camera 111 that is temporally closest to the same abnormal state.
- the anomaly tracking processing unit 101c similarly performs a process of comparing images of the plurality of cameras 111 from when an anomalous state is detected until the production line is stopped. Then, when it is determined that the abnormal states reflected in the images of the plurality of cameras 111 are the same abnormal state, the abnormality tracking processing unit 101c detects the abnormal state reflected in the images of the plurality of cameras 111 as described above. Tracking processing is performed to trace the trajectory of the movement of the abnormal state as the same abnormal state and connect the images to create recorded image data.
- the recording processing unit 101d associates information associated with the detected abnormal state with the video that has been tracked and linked by the abnormality tracking processing unit 101c, and creates a record that has been tracked and linked.
- a process of storing the image and the information associated with the abnormal state in the storage unit 102 is performed.
- the video data of the recorded video that has been subjected to tracking processing and concatenated is video data that cannot be overwritten because the video data to which overwrite prohibition information has been added is concatenated.
- the information associated with the abnormal state is information regarding the abnormal state.
- the recording processing unit 101d performs recording processing for recording information associated with an abnormal state, which is various types of information related to the same abnormal state, in association with the video data of the recorded video that cannot be overwritten and linked by the abnormality tracking processing unit 101c. apply. Specifically, the recording processing unit 101d creates a data table in the storage unit 102 for the video data of the recording video that cannot be overwritten and that is linked by the abnormality tracking processing unit 101c. A data table is created separately for each abnormal condition detected.
- the display instruction unit 101e is a user interface unit that causes the display unit 103 to display recorded information stored in the storage unit 102 according to instructions from the user.
- the display instruction unit 101e causes the display unit 103 to display a screen for searching or specifying information that the user wants to display on the display unit 103, and prompts the user to input necessary information through the input unit 105.
- FIG. Using the input unit 105, the user selects various images or information to be displayed on the display unit 103, such as real-time images in which an abnormal state has not been detected, images of past abnormal states recorded in the storage unit 102, and the like. , can be directed.
- the display instruction unit 101e searches for information specified by the user and displays the search result on the display unit 103, or displays the information specified by the user on the display unit. 103 is displayed.
- the storage unit 102 stores and stores the video data linked by the recording processing unit 101d and the information associated with the abnormal state.
- the storage unit 102 has two different independent storage areas, a first storage area 102a and a second storage area 102b.
- the storage unit 102 stores, in the first storage area 102a, overwritable video delivered from each camera 111 when no abnormal state is detected.
- the storage unit 102 stores the video data of the non-overwritable video processed by the anomaly detection processing unit 101b, the anomaly tracking processing unit 101c, and the recording processing unit 101d after an abnormal state is detected, and information related to the non-overwritable video, Store in the second storage area 102b.
- the information related to the video that cannot be overwritten is the information that accompanies the detected abnormal condition. That is, the storage unit 102 stores video data of overwritable video, video data of non-overwritable video, and information related to the non-overwritable video in different storage areas.
- the data table described above is created in the second storage area 102b by the recording processing unit 101d.
- the display unit 103 displays various information instructed by the display instruction unit 101e.
- the display unit 103 displays an image or information instructed by the display instructing unit 101e.
- the display unit 103 preferentially displays the image and information obtained by tracking the abnormal state.
- the display unit 103 is exemplified by a display device such as a liquid crystal monitor.
- the monitoring communication unit 104 performs wireless communication with the camera 111 to transmit and receive video data or information. Also, the monitoring communication unit 104 performs wireless communication with the FA controller 201 to transmit and receive information. Note that the communication method of the monitoring communication unit 104 is not limited to wireless communication, and may be wired communication.
- the input unit 105 is configured with an input device, receives instruction information from the user, and transmits the received instruction information to the display instruction unit 101e.
- input devices include devices such as keyboards and touch panels.
- FIG. 6 is a flowchart showing an example of a processing procedure when the production line monitoring system 1 according to the first embodiment monitors the production line.
- the camera 111 which is a monitoring image of the production line to be monitored in the production line monitoring system 1, captures a camera image of the production line.
- a camera image acquisition step to acquire is performed.
- a plurality of cameras 111 arranged around the production line to be monitored in the production line monitoring system 1 acquires image data of the production line by photographing the production line.
- the video data here is video data that can be overwritten.
- the plurality of cameras 111 deliver overwritable video data to the scanning frequency control unit 101a and the abnormality detection processing unit 101b.
- the scanning frequency control unit 101a and the abnormality detection processing unit 101b receive image data from the plurality of cameras 111, thereby obtaining image data of the production line.
- step S20 calibration processing is performed.
- the calibration process if the moving speed of the production line is unknown, the production line is marked with an easy-to-recognize mark. Then, the scanning frequency control unit 101a adjusts the ratio between the actual physical length unit and the pixel length unit in the image based on the image captured by one camera 111 representative of the plurality of cameras 111. Calibration processing is performed by calculating. Also, based on the image captured by the camera 111, the passing speed of the mark is calculated by image processing.
- FIG. 7 is a diagram for explaining an example of a method of calculating the moving speed of the production line from the image acquired from the camera 111 in the first embodiment.
- FIG. 8 is a diagram for explaining movement of the mark 130 appearing in the image acquired from the camera 111 in the first embodiment.
- a mark 130 such as a tape having a known width and length is attached in advance to the production line. That is, the mark 130 is affixed to the conveyor belt 204 in advance. The mark 130 is then photographed by the camera 111 . Next, the scanning frequency control unit 101a uses the image data of the image captured by the camera 111 to set the width and length of the mark 130 using the numerical values of the known actual length of the mark 130 as input values. The ratio between the numerical value of the actual length and the numerical value of the pixel length of the mark 130 appearing in the image is calculated by image processing.
- the scanning frequency control unit 101a performs lens distortion correction that corrects the influence of lens distortion, and calculates a constant ratio that matches the image shown in the video.
- this processing is defined as calibration processing.
- the mark 130L on the left side indicates the mark 130 in one frame in the captured video.
- the mark 130R on the right side indicates the mark 130 in the next frame in the captured image. That is, the mark 130 moves from the position of the mark 130L on the left to the position of the mark 130R on the right between two consecutive frames of the captured image.
- the distance that the mark 130 moves in the image from the position of the mark 130L on the left side to the position of the mark 130R on the right side is the moving distance of the mark 130 in the image in pixel length.
- step S30 If it is determined that it is necessary to acquire the scanning frequency, the answer in step S30 is Yes, and the process proceeds to step S40. If it is determined that there is no need to acquire the scanning frequency, the determination in step S30 is No, and the process proceeds to step S50.
- step S40 the scanning frequency is calculated.
- the scanning frequency control unit 101a uses the average value of the moving speed of the production line obtained by calibration processing from one camera 111 serving as a representative of the plurality of cameras 111 to 111 performs a process of calculating an appropriate scanning frequency.
- the calculated scanning frequency is stored and held in the scanning frequency control unit 101a.
- step S50 synchronization processing of the multiple cameras 111 is performed. Specifically, in the synchronization processing of the plurality of cameras 111, the scanning frequency control unit 101a transmits the calculated scanning frequency to all the cameras 111 and feeds it back. All cameras 111 receive the scanning frequency transmitted from the scanning frequency control unit 101a. The shutter speed of each camera 111 is obtained from the value of the scanning frequency transmitted from the scanning frequency control unit 101a, and has the same value.
- Each camera 111 changes the shutter speed based on the received scanning frequency according to the most recent time information received from the scanning frequency control unit 101a, and distributes images to the scanning frequency control unit 101a and the abnormality detection processing unit 101b. Start. All the cameras 111 perform the above processing and are synchronized, so that errors in each frame time information of the video shot by each camera 111 can be reduced as much as possible. Between each camera 111, by minimizing the error of the frame time information between the frames in the images shot by the cameras 111, the frames of the images shot by the different cameras 111 can be temporally cross-referenced. becomes.
- an abnormality detection step is performed to detect an abnormal state, and it is determined whether or not an abnormal state has been detected in the production line.
- the abnormality detection processing unit 101b compares the video data acquired from the plurality of cameras 111 with the pre-stored video data representing the normal state of the production line. Detect abnormal conditions. In other words, the abnormality detection processing unit 101b compares the image of the current production line acquired from the plurality of cameras 111 with the image representing the production line in a normal state, which is stored in advance. Detect abnormal conditions
- step S80 a tracking process step for tracking an abnormal state is performed.
- the anomaly tracking processing unit 101c compares the information about the anomalous state added to the images acquired from the plurality of cameras 111 in step S70, so that the abnormal state detected between the plurality of cameras 111 It is determined whether the abnormal states are the same.
- the abnormality tracking processing unit 101c detects the abnormal state among the images of the plurality of cameras 111 in which the abnormal state is detected.
- a process is performed to track the continuous movement in time of the product 207 or production line situation that caused the .
- the abnormality detection processing unit 101b selects an abnormality cause presumed to correspond to the detected abnormal state among the labeling information of the plurality of abnormality causes stored in advance in the abnormality detection processing unit 101b as candidates for the cause of the abnormal state.
- the labeling information and the positional coordinate information of the abnormal frame in the frame are added to each video data frame.
- the abnormality detection processing unit 101b stores and holds the labeling information and the position coordinate information as the information of the camera 111-1.
- Information about the camera 111-1 is information about the camera 111.
- the abnormality detection processing unit 101b detects the image captured by the camera 111 when the condition of the product 207 or the production line that caused the abnormal state moves out of the imaging range of the camera 111-1 and enters the imaging range of another camera 111.
- the frame, labeling information, and abnormal state frame is added to the captured image, and stored as information of the camera 111 and retained.
- the anomaly detection processing unit 101b transmits video data of images captured by the cameras 111 and information of each camera 111 to the anomaly tracking processing unit 101c.
- the anomaly tracking processing unit 101c receives video data of images captured by each camera 111 and information of each camera 111 from the anomaly detection processing unit 101b.
- the abnormality tracking processing unit 101c compares the information of each camera 111 from when the abnormal state is first detected until the abnormal state is resolved and the operation of the production line is restarted.
- the abnormality tracking processing unit 101c determines whether the labeling information in the camera 111 information for the plurality of cameras 111 matches, or the position coordinate information in the abnormal state frame in the camera 111 information for the plurality of cameras 111 is a close value. and whether the photographing time information attached to the imaged frames is close to each other.
- the imaging time information added to the imaging frame is information on the time when the imaging frame was shot.
- the abnormality tracking processing unit 101c determines that the abnormal states captured in the images of the different cameras 111 are the same abnormal state. Then, the abnormality tracking processing unit 101c tracks the trajectory of movement of the abnormal states detected by the plurality of cameras 111 .
- the product 207 is determined to be in an abnormal state different from the normal state in the image captured by the camera 111-1 in the abnormality detection processing unit 101b. Further, in the images captured by the cameras 111-2, 111-3, and 111-4, the product 207 is determined to be in an abnormal state different from the normal state.
- the abnormality detection processing unit 101b for the abnormal state detected in the video captured by each camera 111, as described above, the frame, the labeling information, and the position coordinate information in the frame of the abnormal state within the frame, It is added to the photographed image and stored as information of the camera 111 and retained.
- the even-numbered cameras 111 are arranged on the opposite side of the odd-numbered cameras 111 across the belt conveyor 203, which is the production line. That is, the even-numbered cameras 111 photograph the production line from the opposite side of the odd-numbered cameras 111 across the belt conveyor 203, which is the production line.
- the abnormality tracking processing unit 101c unifies the position coordinates of the images captured by the even-numbered cameras 111 and the images captured by the odd-numbered cameras 111, and compares the coordinate position information. That is, the anomaly tracking processing unit 101c compares the coordinate position information by inverting the position coordinates in the detected and frame-added frame in the vertical direction.
- the information of these cameras 111, the position information of the adjacent camera 111, the photographing time information of the end of the frame of the image showing the abnormal state detected in the image of a certain camera 111, and the moving direction of the production line. is transmitted from the abnormality detection processing unit 101b to the abnormality tracking processing unit 101c.
- the anomaly tracking processing unit 101c compares these pieces of information for the multiple cameras 111.
- FIG. The abnormality tracking processing unit 101c determines whether or not the abnormal states captured by the multiple cameras 111 are the same abnormal state based on the comparison result.
- the abnormality tracking processing unit 101c detects the end frame of the images of the cameras 111 in which the abnormal state is captured, The start frame of the image of the adjacent next camera that shows the abnormal state is connected.
- the abnormal state similarly detected in the images taken by each camera 111 other than the camera 111-1 is detected in the image of the camera 111-1, which is the cause of the alarm when the production line stops as described above.
- the abnormal state is compared with the abnormal state in the abnormality tracking processing unit 101c to determine identity.
- the currently occurring abnormal state is first detected in the image captured by the camera 111-1, passes in front of the cameras 111-2 and 111-3, and passes in front of the camera 111-4. It can be seen that the camera 111-4 continues to be in the position of the camera 111-4.
- the abnormality tracking processing unit 101c determines that the abnormal state first detected in the image of the camera 111-1 is currently stopped in front of the camera 111-4.
- the display instruction unit 101e displays the information on the situation in which an abnormal state was detected by the camera 111-1 and the alarm was generated, and the current abnormal state in front of the camera 111-4.
- the user is notified by displaying on the display unit 103 the information on the situation in which the cause of the failure is stopped. That is, the anomaly tracking processing unit 101c transmits to the display instruction unit 101e the image when an abnormal state is first detected in the image of the camera 111-1 and the real-time image of the camera 111-4.
- the display instruction unit 101e causes the display unit 103 to display the image. As a result, the user can be urged to quickly eliminate the abnormal state.
- FIG. 10 shows information of a situation in which an abnormal state is detected by camera 111-1 and an alarm is generated, and a situation in which the cause of the abnormal state is currently stopped in front of camera 111-4 in the first embodiment.
- 3 is a diagram showing a state in which information is displayed on a display unit 103.
- FIG. 10 As shown in FIG. 10, in the display unit 103, an image of the camera 111-1 in which an alarm is generated by detecting an abnormal state first in the camera 111-1 is displayed in the left area.
- the image of the camera 111-4 in which the object causing the abnormal state is stopped in front of is displayed in the right area.
- step S90 the abnormality tracking processing unit 101c determines whether or not the production line has stopped.
- the FA controller 201 transmits stop information indicating that the driving device 202 has stopped to the production line monitoring device 10 .
- the abnormality tracking processing unit 101c determines that the production line has stopped when stop information is received via the monitoring communication unit 104.
- FIG. The abnormality tracking processing unit 101c determines that the production line is not stopped when the stop information is not received.
- the storage unit 102 is provided with position information of a plurality of cameras 111, and when an abnormal state is detected by the abnormality detection processing unit 01b, the information of the camera 111 that captured the image in which the abnormal state was detected and the information of the abnormal state The location information of the camera 111 that captured the video in which the is detected and the thumbnail image that is the captured image of the detected abnormal state are recorded in association with the video showing the abnormal state.
- step S130 processing related to display of images or information stored in the storage unit 102 is performed.
- step S130 it is determined whether or not a reproduction instruction has been received. Specifically, the display instruction unit 101e determines whether or not an instruction to reproduce video or information stored in the storage unit 102 has been received from the input unit 105 .
- the user searches for a desired recorded video from the displayed condition search screen based on conditions such as the time when the abnormal state occurred or the position information of the camera 111 and thumbnail images, and instructs the display unit 103 to display the recorded video. can do.
- the input unit 105 transmits the reproduction instruction to the display instruction unit 101e. After that, the process proceeds to step S150.
- step S150 if it is determined in step S130 that a reproduction instruction has been received and the process proceeds from step S140 to step S150, in step S70, abnormality information, which is information regarding an abnormal state, is added.
- the recorded video resulting from the state tracking process is combined with the video when the abnormal state was detected and the current positional information of the abnormal state when the production line was stopped and the second recording process was performed in step S110. is displayed along with the judgment result.
- the thumbnail images 132 displayed according to the data of the thumbnail images 132 stored in the data table of the storage unit 102 corresponding to the search result by the keyword input by the user are displayed as search target candidates for the user. are displayed side by side as Since the thumbnail images 132 that are candidates for the user's search target are displayed in the thumbnail display area 1032, the user who gives the reproduction instruction can select the thumbnail images 132 that are candidates for the user's search target by inputting a small number of search conditions. can see
- the user can view the recorded video corresponding to the selected thumbnail image 132 stored in the storage unit 102 in the video display area 1032 . can be displayed.
- the user's load when searching for a desired recorded video and displaying it in the video display area 1031 can be reduced, and the searchability of the recorded video can be improved.
- the production line monitoring device 10 performs the calibration process so that the shutters of the cameras 111 are detected.
- the scan frequency can be calculated such that the timing is optimized. Further, since the scanning frequency shared by all the cameras 111 in the production line monitoring system 1 can be calculated by the scanning frequency control unit 101a, it is possible to introduce a plurality of cameras 111 compared to a monitoring system in which a plurality of single cameras are introduced. and easy to control synchronization.
- the shutter timing of the camera 111 is optimized by the scanning frequency control unit 101a. can be photographed to monitor objects and production lines. As a result, the production line monitoring system 1 can increase the detection rate of an abnormal state by image processing.
- the abnormality detection processing unit 101b detects an abnormal state in real time by image processing, and adds various information related to the abnormal state such as a frame 131 to the image in which the abnormal state is detected. As a result, in the production line monitoring system 1, it is possible to confirm the abnormal state that has occurred more quickly and more specifically when confirming the video.
- the same detected abnormal state is tracked by the abnormality tracking processing unit 101c until the production line is stopped.
- the position of the camera 111 capturing the abnormal state is presented to the user as the current position of the stopped abnormal state in the production line. be able to.
- the current position of the abnormal state estimated from the position of the camera 111 that captured the last abnormal state is displayed to the user as the current position of the abnormal state. can be presented.
- the user can quickly grasp the current location of the cause of the abnormal state, quickly eliminate the cause of the abnormal state from the production line, and quickly restart the production line.
- the recording processing unit 101d causes the storage unit 102 to store the image of the camera 111 as an overwritable recorded image when no abnormal state is detected. Further, when an abnormal state is detected, the recording processing unit 101d adds overwrite prohibition information to the video data showing the abnormal state so that overwriting and deletion cannot be performed for a certain period of time without a user instruction. do. Thereby, in the production line monitoring system 1, the capacity of the storage unit 102 can be used efficiently.
- the display unit 103 can display various information linked to the recorded video by the recording processing unit 101d in an easy-to-understand manner. Further, when an alarm is generated due to the detection of an abnormal state, a thumbnail image 132 obtained by selecting a recorded image with the highest image quality from recorded images showing an object that causes the abnormal state and converting it into a thumbnail can be displayed on the display unit 103. . As a result, in the production line monitoring system 1, it is possible to improve the visibility of the abnormal state on the instruction screen when instructing to reproduce the video showing the abnormal state that has occurred.
- the production line monitoring system 1 causes all the cameras 111 to shoot based on the same scanning frequency, and controls the shooting timing of the plurality of cameras 111, thereby detecting the cause of the abnormal state detected in the shot video. is tracked, and when the production line stops when an abnormal state is detected, the location of the abnormal state can be quickly identified, and the cause of the abnormal state can be easily eliminated.
- the detection device 22 is a state detection unit that detects the state of the process of the production line.
- the detection device 22 includes multiple cameras 111 and multiple sensors 121 .
- the sensor 121 is a sensor that detects information on the state of the production line process that cannot be obtained from the video captured by the camera 111 .
- the process state of the production line that cannot be obtained from the video is exemplified by the product 207 or the temperature of the production line.
- a plurality of sensors 121 are arranged at different predetermined positions around the belt conveyor 203 driven by the motor, which is the driving device 202, in the FA system 230, where the product 207 or the state of the production line can be acquired.
- there is A sufficient number of sensors 121 are arranged to monitor any process desired to be monitored in a plurality of processes in the production line.
- a sufficient number of sensors 121 are arranged to monitor all the processes in the production line when it is desired to monitor all the processes.
- the sensor 121 includes a sensor detection section 121a, a sensor communication section 121b, and a sensor control section 121c.
- the monitoring control unit 211 controls the production line monitoring device 21 as a whole.
- the monitoring control unit 211 also includes a scanning frequency control unit 211a, an abnormality detection processing unit 211b, an abnormality tracking processing unit 211c, a recording processing unit 211d, and a display instruction unit 211e.
- the components of the monitor control unit 211 can exchange video data and information with each other.
- the scanning frequency control unit 211a receives information about the known movement speed of the production line, calculates an appropriate scanning frequency for collectively controlling the shutter speeds of the multiple cameras 111, and controls the multiple cameras 111. collectively control the shooting timing of
- Each camera 111 changes the shutter speed based on the received scanning frequency according to the most recent time information received from the scanning frequency control unit 211a, and starts distributing the video. All the cameras 111 perform the above processing and are synchronized, so that errors in each frame time information of the video shot by each camera 111 can be reduced as much as possible. Between each camera 111, by minimizing the error of the frame time information between the frames in the images shot by the cameras 111, the frames of the images shot by the different cameras 111 can be temporally cross-referenced. becomes.
- the abnormality detection processing unit 211b compares video data transmitted from the plurality of cameras 111 and sensor detection information transmitted from the plurality of sensors 121 with pre-stored information representing a normal state to detect an abnormality occurring in the production line. Detect abnormal conditions As a result of the comparison, the abnormality detection processing unit 211b determines that there is a difference equal to or greater than a predetermined threshold value, and if the image acquired from each camera 111 shows the state of the product 207 or the production line, an abnormality occurs in the production line. It is determined that an abnormal state has been detected, and an alarm is output.
- the abnormality detection processing unit 211b determines that an abnormal state has been detected and outputs an alarm.
- the abnormality detection processing unit 211 b transmits alarm information to the FA controller 201 via the monitoring communication unit 104 .
- the abnormality detection processing unit 211b performs the same processing as the abnormality detection processing unit 101b in the first embodiment.
- the anomaly tracking processing unit 211c performs the same processing as the anomaly tracking processing unit 101c in the first embodiment.
- the recording processing unit 211d performs the same processing as the recording processing unit 101d in the first embodiment.
- the display instruction unit 211e performs the same processing as the display instruction unit 101e in the first embodiment.
- FIG. 15 is a flowchart showing an example of a processing procedure when the production line monitoring system 2 according to the second embodiment monitors the production line.
- step S210 the camera 111 captures a camera image of the production line, which is a monitoring image of the production line to be monitored by the production line monitoring system 2.
- a camera image acquisition step to acquire is performed.
- a plurality of cameras 111 arranged around the production line to be monitored in the production line monitoring system 1 acquires image data of the production line by photographing the production line.
- the video data here is video data that can be overwritten.
- a sensor detection process is performed in which a plurality of sensors 121 detects information about the state of the process of the production line to be monitored by the production line monitoring system 2 .
- a plurality of sensors 121 arranged around the production line to be monitored in the production line monitoring system 2 detects information on the process state of the production line and acquires sensor detection information.
- step S220 calibration processing is performed in step S220.
- the scanning frequency control unit 211a receives the known moving speed of the production line as an input and saves it as a history.
- the scanning frequency control unit 211 a performs processing for determining whether it is necessary to calculate the scanning frequency for controlling the shutter speed of the camera 111 .
- the scanning frequency control unit 211a determines that it is necessary to calculate the scanning frequency.
- the scanning frequency control unit 211a determines that there is no need to calculate the scanning frequency when the input movement speed of the production line is a value that has already been input, and when the input value is sufficiently low. do.
- step S230 If it is determined that it is necessary to calculate the scanning frequency, the answer in step S230 is Yes, and the process proceeds to step S240. If it is determined that there is no need to calculate the scanning frequency, the determination in step S230 is No, and the process proceeds to step S250.
- step S240 the scanning frequency is calculated.
- the scanning frequency control unit 211a performs processing for calculating appropriate scanning frequencies for all the cameras 111 based on the input value of the moving speed of the production line, as in the case of the first embodiment. .
- the calculated scanning frequency is stored and held in the scanning frequency control unit 211a.
- step S250 synchronization processing of the plurality of cameras 111 is performed in the same manner as in the first embodiment. Specifically, in the synchronization processing of the plurality of cameras 111, the scanning frequency control unit 211a transmits the calculated scanning frequency to all the cameras 111 and feeds it back. All cameras 111 receive the scanning frequency transmitted from the scanning frequency control unit 211a. The shutter speed of each camera 111 is obtained from the value of the scanning frequency transmitted from the scanning frequency control unit 211a, and has the same value.
- an abnormality detection step is performed to detect an abnormal state, and it is determined whether or not an abnormal state has been detected in the production line.
- the abnormality detection processing unit 211b compares the image data acquired from the plurality of cameras 111 with the pre-stored image data representing the normal state of the production line. Detect abnormal conditions. That is, the abnormality detection processing unit 211b compares the image of the current production line acquired from the plurality of cameras 111 with the image representing the production line in a normal state stored in advance, thereby detecting an abnormality occurring on the production line. Detect abnormal conditions
- the abnormality detection processing unit 211b compares sensor detection information acquired from the plurality of sensors 121 and information representing a normal state stored in advance to detect an abnormal state occurring in the production line.
- step S280 to step S350 is the same as the processing from step S80 to step S150 in FIG. 6, so the description is omitted.
- FIG. 16 is a diagram showing an example of scanning frequency calculation in the second embodiment.
- the user inputs the moving speed of the production line to the production line monitoring device 21 after calculating the ratio between the actual length unit and the pixel length unit in the calibration process.
- the scanning frequency is calculated based on the input numerical value of the moving speed of the production line.
- the input of the movement speed of the production line is Ms: rotation speed [rpm].
- the calculation result is 1/ ⁇ : scanning frequency [Hz].
- the production line monitoring system 2 according to the second embodiment described above has the same effects as the production line monitoring system 1 according to the first embodiment.
- the minimum shutter speed described in the equation (1) of the first embodiment can be calculated.
- a scanning frequency can also be calculated.
- the production line monitoring system 2 introduces a plurality of cameras 111 compared to a monitoring system that introduces a plurality of single cameras for monitoring the process of a production line with a known moving speed of the production line. and easy to control synchronization.
- the initial value of the shutter speed of the camera 111 may be set. If the moving speed of the production line is sufficiently slow and it is clear that the right-hand side of equation (1) is a sufficiently large value compared to the initial value of the shutter speed, which is the left-hand side, then the appropriate scanning frequency is the initial value of the shutter speed. It is calculated as the reciprocal of the value and does not require any other numerical input. For this reason, the production line monitoring system 2 can be easily introduced to monitor processes in which the movement speed of the production line is sufficiently low.
- a configuration in which a plurality of detection devices each having one camera 111, one sensor 121, and one abnormality detection processing unit 211b is provided may be employed.
- the multiple detection devices 22 are independent of each other.
- the camera 111 and the sensor 121 are each connected to the abnormality detection processing section 211b.
- the camera 111 distributes overwritable video image data to the abnormality detection processing unit 211 b and the production line monitoring device 21 .
- the sensor 121 detects the product 207 flowing through the process of the production line or the status of the production line, and transmits the obtained sensor detection information to the abnormality detection processing section 211b.
- FIG. 17 is a diagram showing a hardware configuration when the functions of the production line monitoring device 10 according to the first embodiment and the production line monitoring device 21 according to the second embodiment are realized by a computer system.
- the respective functions of the production line monitoring device 10 and the production line monitoring device 21 are realized by a computer system, the respective functions of the production line monitoring device 10 and the production line monitoring device 21 are implemented by arithmetic processing as shown in FIG.
- the memory 302 is a non-volatile or volatile semiconductor such as RAM (Random Access Memory), ROM (Read Only Memory), flash memory, EPROM (Erasable Programmable ROM), or EEPROM (Electrically EPROM).
- RAM Random Access Memory
- ROM Read Only Memory
- flash memory EPROM (Erasable Programmable ROM), or EEPROM (Electrically EPROM).
- a memory a magnetic disk, a flexible disk, an optical disk, a compact disk, a mini disk, a DVD (Digital Versatile Disc), or the like.
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Abstract
Description
図1は、実施の形態1にかかる生産ライン監視システム1が使用されるFAシステム200を示す図である。本実施の形態1にかかるFAシステム200は、生産ライン監視システム1と、生産ラインにおいて製品を生産するために制御される制御対象機器である駆動装置202と、駆動装置202を制御する制御装置であるFAコントローラ201と、を備える制御システムである。
図12は、実施の形態2にかかる生産ライン監視システム2が使用されるFAシステム230を示す図である。本実施の形態2にかかるFAシステム230は、生産ライン監視システム2と、駆動装置202と、FAコントローラ201と、を備える制御システムである。なお、実施の形態2では、実施の形態1と同様の構成については、同じ符号を付して詳細な説明は省略する。
Claims (13)
- 工場の生産ラインにおける工程を監視するための生産ライン監視装置であって、
前記生産ライン監視装置の外部における互いに異なる位置に配置されて前記生産ラインの状態を撮影する複数の撮影部で取得された映像に基づいて、前記生産ラインの異常状態を検出する異常検出処理部と、
前記異常検出処理部において異常状態が検出された場合に、複数の前記撮影部で撮影された映像のうち前記異常状態と同一の異常状態が撮影されている映像を時系列に沿って連結した記録映像を作成する異常追跡処理部と、
前記記録映像と、検出された前記異常状態に付随する情報とを紐づけて記憶する記憶部と、
を備えることを特徴とする生産ライン監視装置。 - 複数の前記撮影部において撮影タイミングを決定するために用いられる、複数の前記撮影部における撮影タイミングを同期させるための走査周波数を算出する走査周波数制御部と、
を有することを特徴とする請求項1に記載の生産ライン監視装置。 - 前記異常検出処理部は、前記生産ライン監視装置の外部における互いに異なる位置に配置された複数のセンサで取得され、前記撮影部で取得された映像から取得できない前記生産ラインの状態の情報、または複数の前記撮影部で取得された映像に基づいて、前記生産ラインの異常状態を検出すること、
を特徴とする請求項1または2に記載の生産ライン監視装置。 - 前記異常検出処理部は、前記異常状態が検出された前記映像に対して、上書きを禁止する旨の上書き不可情報を付与すること、
を特徴とする請求項1から3のいずれか1つに記載の生産ライン監視装置。 - 前記記憶部は、複数の前記撮影部の位置情報を備え、前記異常検出処理部により異常状態が検出された場合、前記異常状態が検出された映像を撮影した前記撮影部の情報と、前記異常状態が検出された映像を撮影した前記撮影部の位置情報と、検出された前記異常状態の撮影画像と、を前記撮影された映像に紐づけて記録すること、
を特徴とする請求項1から4のいずれか1つに記載の生産ライン監視装置。 - 前記記録映像と、検出された前記異常状態に付随する情報とを紐づけて前記記憶部に記憶させる記録処理部を備えること、
を特徴とする請求項1から5のいずれか1つに記載の生産ライン監視装置。 - 前記記憶部に記憶された情報を表示する表示部を備えること、
を特徴とする請求項1から6のいずれか1つに記載の生産ライン監視装置。 - 前記表示部は、前記撮影部において撮影されたリアルタイム映像を表示し、または前記記憶部に記憶された前記記録映像を前記異常状態に付随する情報とともに表示すること、
を特徴とする請求項7に記載の生産ライン監視装置。 - 工場の生産ラインにおける工程を監視するための生産ライン監視システムであって、
請求項1から8のいずれか1つに記載の生産ライン監視装置と、
前記生産ライン監視装置の外部における互いに異なる位置に配置されて前記生産ラインの状態を撮影する複数の撮影部と、
を備えることを特徴とする生産ライン監視システム。 - 生産ライン監視装置において工場の生産ラインにおける工程を監視するための生産ライン監視方法であって、
前記生産ライン監視装置が、前記生産ライン監視装置の外部における互いに異なる位置に配置されて前記生産ラインの状態を撮影する複数の撮影部で取得された映像に基づいて、前記生産ラインの異常状態を検出するステップと、
前記生産ライン監視装置が、前記異常状態を検出するステップにおいて異常状態が検出された場合に、複数の前記撮影部で撮影された映像のうち前記異常状態と同一の異常状態が撮影されている映像を時系列に沿って連結した記録映像を作成するステップと、
前記生産ライン監視装置が、前記記録映像と、検出された前記異常状態に付随する情報とを紐づけて記憶部に記録するステップと、
を含むことを特徴とする生産ライン監視方法。 - 前記生産ライン監視装置が、複数の前記撮影部において撮影タイミングを決定するために用いられる、複数の前記撮影部における撮影タイミングを同期させるための走査周波数を、前記生産ラインの移動速度に基づいて算出するステップを含むこと、
を特徴とする請求項10に記載の生産ライン監視方法。 - 前記生産ライン監視装置が、前記走査周波数を撮影範囲が重複していない複数の前記撮影部に送信して、複数の前記撮影部における撮影タイミングを同期させることで、複数の前記撮影部で撮影された映像のフレームの時間情報を同期させること、
を特徴とする請求項11に記載の生産ライン監視方法。 - 前記生産ライン監視装置が、前記撮影部において撮影されたリアルタイム映像を表示部に表示し、または前記記憶部に記憶された前記記録映像を前記異常状態に付随する情報とともに表示部に表示するステップを含むこと、
を特徴とする請求項10から12のいずれか1つに記載の生産ライン監視方法。
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JP2018128729A (ja) * | 2017-02-06 | 2018-08-16 | コニカミノルタ株式会社 | 工程監視装置、工程監視装置の制御方法およびプログラム |
JP2020071568A (ja) * | 2018-10-30 | 2020-05-07 | キヤノンマーケティングジャパン株式会社 | 情報処理システム、情報処理方法、及びプログラム。 |
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WO2025109937A1 (ja) * | 2023-11-21 | 2025-05-30 | パナソニックIpマネジメント株式会社 | 監視システム及び監視方法 |
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CN117461004A (zh) | 2024-01-26 |
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