JP5826367B1 - Process monitoring device - Google Patents

Abstract

The present invention provides a process monitoring apparatus capable of taking measures against a choke stop occurring in a production line with a simple configuration. A process monitoring device (1) includes a photographing means (11) for photographing an operation state of a process, a memory (107) for storing photographed video data, and a detection device installed in a production line. And an external input means (103) for inputting a signal as a trigger signal. Further, the process monitoring device (1), when a trigger signal is input, out of the video data recorded in the memory (107), the video data that goes back in the past for a set time from the time when the trigger signal is input. And a storage processing means (104) for storing video data that cannot be overwritten. [Selection] Figure 4

Description

  The present invention relates to a process monitoring apparatus for monitoring a process in a production line of a factory.

  The “choco stop” that occurs in the factory production line is accompanied by a decrease in the operating rate, so it is desirable to investigate the cause and remove it. “Choco stop” means that facilities and work are stopped due to a temporary trouble. Usually, in order to take measures against this “chocolate stop”, the operation state of the process is photographed using a general video camera.

  On the other hand, a process monitoring system specialized for production lines has been proposed. For example, in Japanese Patent Laid-Open No. 2000-127000 (Patent Document 1), the system includes a plurality of cameras for process monitoring and a management computer connected to the plurality of cameras. It is disclosed that display means for displaying an image of a photographed process is provided.

  Japanese Patent Laid-Open No. 2002-132324 (Patent Document 2) discloses that when an abnormal state of a production facility is detected by a camera control unit connected to a video camera, the lighting state changes according to the operating state of the production facility. It is disclosed that shooting of a signal tower is started.

JP 2000-127000 A JP 2002-132324 A

  In the case of continuously recording a video of the operation state of a process using a general video camera, it is difficult to find a video when an abnormal state such as a choke stop occurs from the recorded video. Moreover, the systems as disclosed in Patent Documents 1 and 2 are not only large-scale but also cannot identify the cause of the chocolate stop from the recorded video.

  The present invention has been made to solve the above-described problems, and an object of the present invention is to provide a process monitoring apparatus capable of taking measures against a choke stop occurring in a production line with a simple configuration.

  A process monitoring apparatus according to an aspect of the present invention is a process monitoring apparatus for monitoring a process in a production line of a factory, and includes a photographing unit, a memory, an external input unit, and a storage processing unit. The photographing means photographs the operation state of the process. The memory stores video data photographed by the photographing means. The external input means inputs a signal from a detection device installed in the production line as a trigger signal. When the trigger signal is input, the save processing means saves the video data recorded in the memory that has been traced back more than the set time from the time when the trigger signal was input as video data that cannot be overwritten. To do.

  Preferably, the process monitoring device further includes a time setting unit for changing the set time.

  Preferably, the process monitoring apparatus further includes a casing provided with the photographing unit and the memory, and a display unit provided in the casing and displaying an image photographed by the photographing unit.

  In addition, the process monitoring device, when a reproduction instruction is input from the user, reads out the video data stored in the memory and displays it on the display unit, and the video displayed by the display unit cannot be overwritten. It is desirable to further include notifying means for notifying whether or not the video has been played.

  The process monitoring device may further include a recording processing unit that records a moving image file in a set time unit in a memory based on video data captured by the imaging unit. In this case, it is preferable that the storage processing unit sets the moving image file being recorded in the memory and at least the immediately preceding moving image file to be overwritable when a trigger signal is input.

  Preferably, the process monitoring apparatus further includes an operation signal input unit for inputting an operation signal of the process. In this case, it is desirable that the recording processing unit starts the recording process in response to the operation signal being input by the operation signal input unit.

  Moreover, it is desirable that the process monitoring apparatus further includes an operation unit that receives an input of an instruction from the user. In this case, the operation means may include an operation button for inputting a trigger signal.

  The process monitoring device may further include a connector connected to a factory DC power source.

  A process monitoring apparatus according to another aspect of the present invention is a process monitoring apparatus for monitoring a process in a production line of a factory, and includes a photographing unit, a memory, an external input unit, a determination unit, and a storage processing unit. Is provided. The photographing means photographs the operation state of the process. The memory stores video data photographed by the photographing means. The external input means inputs a sensor signal from a sensor installed in the production line. The determining means determines the presence or absence of an abnormal state based on the sensor signal input to the external input means. The storage processing means cannot overwrite video data recorded in the memory that goes back more than the set time from the time when the occurrence of the abnormal condition is detected, when the judging means determines that the abnormal condition has occurred. Save as video data.

  According to the present invention, it is possible to take measures against a chocolate stop occurring in a production line with a simple configuration.

It is a figure which shows notionally the example of installation of the process monitoring apparatus which concerns on embodiment of this invention. It is a perspective view which shows the external appearance of the process monitoring apparatus which concerns on embodiment of this invention. It is a block diagram which shows the hardware constitutions of the process monitoring apparatus which concerns on embodiment of this invention. It is a block diagram which shows the function structure of the process monitoring apparatus which concerns on embodiment of this invention. In embodiment of this invention, it is a figure which shows notionally the process which a preservation | save process part performs. It is a figure which shows the example of a data structure of the management data of each moving image file in embodiment of this invention. It is a flowchart which shows the process monitoring process in embodiment of this invention. In an embodiment of the invention, it is a figure showing an example of a screen displayed on a display part during recording. In an embodiment of the invention, it is a figure showing an example of a screen displayed on a display part during recording. In embodiment of this invention, it is a figure which shows an example of the menu screen displayed on a display part. In an embodiment of the invention, it is a figure showing an example of a screen where a thumbnail image was displayed on a display part.

  Embodiments of the present invention will be described in detail with reference to the drawings. In the drawings, the same or corresponding parts are denoted by the same reference numerals and description thereof will not be repeated.

  The process monitoring apparatus according to the present embodiment is provided in a factory and monitors an arbitrary process in the production line. First, an installation example of the process monitoring apparatus according to the present embodiment will be described.

  Referring to FIG. 1, the process monitoring apparatus 1 monitors, for example, a process 92 in which equipment (a transfer robot) on a production line moves a workpiece W on a transfer path in a previous process 91 onto a transfer path in a next process 93. To do. That is, the process monitoring apparatus 1 captures the operating state of the process 92.

  A detection device 4 electrically connected to the process monitoring device 1 is installed in the production line. The detection device 4 includes, for example, a sensor 5 that detects the state of the workpiece W (interval between workpieces W, inclination of the workpiece W, etc.) flowing on the conveyance path in the next step 93 and a PLC (Programmable) that is a computer connected to the sensor 5. Logic Controller) 6. The process monitoring device 1 and the PLC 6 are electrically connected via a cable 32. The PLC 6 may monitor all processes in the production line.

  The PLC 6 receives the sensor signal from the sensor 5 and determines the presence or absence of an abnormal state based on the sensor signal. Further, the PLC 6 outputs a signal to the process monitoring device 1 when an abnormal state is detected. For example, if it is determined that the interval between the workpieces W flowing on the conveyance path in step 93 is abnormal (not the correct interval) based on the sensor signal, a signal is output from the PLC 6 to the process monitoring device 1 via the cable 32. The This signal functions as a trigger signal described later.

  Below, the structure and operation | movement of the process monitoring apparatus 1 are demonstrated in detail.

(About configuration)
The hardware configuration of the process monitoring apparatus 1 will be described with reference to FIGS.

  As shown in FIG. 2, the process monitoring device 1 has a substantially rectangular parallelepiped casing 7. In the present embodiment, a camera (imaging means) 11 is provided on the front surface 71 of the housing 7, and the operation unit 12 and the display unit 13 are provided on the back surface 72 of the housing 7. The camera 11 is a night vision type camera having a wide-angle lens. The operation unit 12 receives an instruction input from the user. The operation unit 12 has a plurality of operation buttons 121 to 126. For example, the operation button 121 is a power button, and the operation button 122 is a menu button. The large operation button 126 on the display unit 13 is a trigger button. The display unit 13 is configured by a liquid crystal display, for example.

  The upper surface 73, the lower surface 74, and the right side surface 75 of the housing 7 are provided with recesses 22 for attaching the leg portions 23 that function as tripods. The leg portion 23 has an insertion portion to be inserted into the concave portion 22 and an attachment portion provided with a hole 23a through which a screw or the like is inserted, and is attached to an on-site facility or the like.

  A connector (socket) 21 that detachably receives a plug 31 connected to the PLC 6 (detection device 4) is provided on the left side surface 76 of the housing 7. In the present embodiment, the plug 31 is also connected to a cable 33 extending from the DC power source 24, and power is supplied from the DC power source 24 when the plug 31 is connected to the connector 21.

  As shown in FIG. 3, in addition to the camera 11, the operation unit 12, and the display unit 13, the process monitoring apparatus 1 includes a CPU 10 that performs various arithmetic processes, an internal memory 14 that stores various data and programs, A drive device 15 that reads and records data from the detachable recording medium 16, a time measuring unit 17 that performs a time measuring operation, an I / F (interface) 18 that inputs a signal from the detection device 4, and a DC power source 24 It further includes a power input unit 19 for inputting power from and an LED (Light Emitting Diode) 20. All of these are integrally provided in the housing 7.

  The built-in memory 14 is realized by, for example, a nonvolatile memory. The timer unit 17 measures the current date and time. The I / F 18 functions as an external input unit that inputs a signal from the detection device 4 (PLC 6) as a trigger signal. Input of signals to the I / F 18 is realized by contact input (short circuit).

  Next, the functional configuration of the process monitoring apparatus 1 will be described with reference to FIG. The process monitoring apparatus 1 includes, as its functional configuration, the camera 11 and the display unit 13, the operation signal input unit 101, the recording processing unit 102, the trigger signal input unit 103, the storage processing unit 104, and the reproduction instruction input unit. 105, a reproduction processing unit 106, and a memory 107. The memory 107 is realized by, for example, the removable recording medium 16.

  The operation signal input unit 101 inputs a signal indicating that the process 92 to be monitored on the production line has been operated, that is, an operation signal. The operation signal input unit 101 is realized by, for example, a power button 121 included in the operation unit 12. That is, in this embodiment, an operation signal is input in response to a power-on instruction from the user.

  The recording processing unit 102 performs processing for recording (recording) video data captured by the camera 11 in the memory 107 in response to the operation signal input by the operation signal input unit 101. Specifically, the recording processing unit 102 creates a moving image file, for example, in units of one minute based on the captured video data, and sequentially records the created moving image file in the memory 107. According to the storage capacity of the memory 107, the recording processing unit 102 erases the old moving image file in order and overwrites and records the new moving image file.

  The trigger signal input unit 103 inputs a trigger signal. The trigger signal input unit 103 includes an I / F 18 and a trigger button 126 included in the operation unit 12. That is, the trigger signal input unit 103 inputs both the trigger signal output from the detection device 4 and the trigger signal generated when the operation button 126 is pressed by the user.

  When a trigger signal is input to the trigger signal input unit 103, the storage processing unit 104 stores video data that has been traced back in the past for a set time from the time when the trigger signal is input, out of the video data recorded in the memory 107. Save as video data that cannot be overwritten. Specifically, as shown in FIG. 5, when a trigger signal is input, the moving image file (n) being recorded in the memory 107, the immediately preceding moving image file (n-1), and one of them. The subsequent moving image file (n + 1) is set so as not to be overwritten. In the present embodiment, in addition to the moving image file (n) being recorded, both the preceding and subsequent moving image files (n−1, n + 1) are set to be non-overwritable, but at least the previous moving image file (n−) is set. It is sufficient that 1) is not overwritten. In this embodiment, since the time length of the moving image of each file is 1 minute, the moving image file (n) at the time of the trigger signal input and the immediately preceding moving image file (n−1) cannot be overwritten. Video data traced back in the past for 1 minute (set time) or more can be saved.

  FIG. 6 is a diagram illustrating a data structure example of management data of each moving image file. Each management data includes, for example, an ID (identification information) for identifying a moving image file, a recording date and time, an address of the moving image file, and a storage flag indicating whether or not overwriting is possible. The storage flag stores, for example, “0” when overwriting is possible and “1” when overwriting is not possible. The storage processing unit 104 changes the value of the storage flag.

  The reproduction instruction input unit 105 receives a reproduction instruction from the user. The reproduction instruction input unit 105 is realized, for example, when the user operates one or a plurality of operation buttons included in the operation unit 12.

  When the reproduction instruction is input from the reproduction instruction input unit 105, the reproduction processing unit 106 performs processing (reproduction processing) of reading the video data stored in the memory 107 and displaying it on the display unit 13. Specifically, the moving image file selected by the user is read and reproduced. When one moving image file is selected, not only the image of the selected moving image file but also the subsequent images may be continuously displayed.

  The functions of the recording processing unit 102, the storage processing unit 104, and the reproduction processing unit 106 illustrated in FIG. 4 are realized by the CPU 10 executing software and exchanging signals and data with the drive device 15, respectively. Is done. Note that at least one function of the processing units 102, 104, and 106 may be realized by hardware.

(About operation)
Next, the operation of the process monitoring apparatus 1 will be described. FIG. 7 is a flowchart showing the process monitoring process in the present embodiment. The process monitoring process is realized by the CPU 10 of the process monitoring apparatus 1 reading and executing a program recorded in advance in the built-in memory 14.

  Referring to FIG. 7, when power supply to process monitoring device 1 is started or when the power is turned on by the user, it is detected that process 92 of the production line has been operated, and the operation state of process 92 Is started (step S2). Specifically, the recording processing unit 102 creates a one-minute video file from the video taken by the camera 11 and writes it in the memory 107 (that is, the recording medium 16) (step S4). The moving image file may also include audio data input to an audio input unit (not shown).

  The recording processing unit 102 sequentially writes moving image files in an open area of the video recording area of the memory 107. At this time, the recording processing unit 102 generates management data for each moving image file and records it in the data area of the memory 107. Until the trigger signal is input (NO in step S6), the storage flag of each management data indicates “0” (overwriting is possible). When the capacity of the memory 107 (capacity of the video recording area) is insufficient, the recording processing unit 102 releases the storage area of the old video file among the video files that can be overwritten, and writes a new video file in that area.

  During recording, the display unit 13 displays the video imaged by the camera 11. At this time, as shown in FIG. 8, the file number 81 of the moving image being recorded and the elapsed time 82 since the recording started may be displayed in a predetermined area of the display unit 13.

  When an abnormal state that causes a choke stop occurs after recording is started, a trigger signal is input to the trigger signal input unit 103 (YES in step S6). Then, the storage processing unit 104 sets the video file being recorded when the trigger signal is input, the previous video file, and the next video file to be overwritable (step S8). . Specifically, the save flag of the management data of the moving image file being recorded and the preceding and subsequent moving image files is rewritten to “1” (not overwritten).

  When a trigger signal is input during recording, information indicating that the moving image file is locked, for example, a key mark 83 is displayed in a predetermined area of the display unit 13 as shown in FIG. By displaying the key mark 83, it is possible to grasp that an abnormality has occurred in the process 92 or the next process 93 to be monitored in addition to the fact that the moving image file being recorded is locked. In addition to or instead of displaying the key mark 83, the abnormal state of the process may be notified by turning on the LED 20.

  Even after the trigger signal is input, the moving image file recording process is continued until the mode of the apparatus is changed to another mode such as a playback mode (NO in step S10).

  Thereafter, when reproduction instruction input unit 105 inputs a reproduction instruction from the user (YES in step S10), recording by recording processing unit 102 is stopped (step S12). The reproduction instruction is input, for example, by the following procedure. When the menu button 122 of the operation unit 12 is pressed, a menu screen as shown in FIG. 10 is displayed on the display unit 13. On the menu screen, for example, selection buttons 84 to 86 such as “video browsing”, “view photo”, and “return to recording” are displayed. Of these selection buttons, when the “video browsing” selection button 84 is instructed, the reproduction instruction input unit 105 inputs a reproduction instruction from the user. The language used for the menu screen or the like is not limited to Japanese, and may be compatible with foreign languages such as English and Chinese. That is, the language used may be set in advance.

  When the reproduction instruction is input, the reproduction processing unit 106 displays the thumbnail image of each moving image file recorded in the memory 107 on the display unit 13 (step S14). An example of the screen at that time is shown in FIG. Referring to FIG. 11, among the plurality of moving image files, a key mark 83 is displayed on the thumbnail image 87 of the moving image file when the trigger signal is input. As a result, the user is notified of which video file is the verification target video file. The key mark 83 may be displayed not only on the moving image file when the trigger signal is input but also on the thumbnail images of all moving image files that are prohibited from being overwritten. Further, only thumbnail images of moving image files that are prohibited from being overwritten may be displayed.

  When one thumbnail image is selected from the displayed thumbnail images, the reproduction processing unit 106 reproduces a moving image file corresponding to the selected thumbnail image (step S16). In moving image reproduction, fast forward and rewind can be performed by operating the buttons of the operation unit 12.

  Thereafter, when there is an instruction to resume recording (YES in step S18), that is, when the menu button 122 is pressed and the "return to recording" selection button 86 is instructed, the process returns to step S2 to resume recording. The subsequent processing is repeated. Note that the process monitoring apparatus 1 also has a function of taking a still image, and the taken photograph can be viewed when the selection button 85 on the menu screen is instructed.

  As described above, according to the process monitoring apparatus 1 of the present embodiment, when an abnormal state is detected by the sensor 5, video data is stored retroactively for one minute or more, so the cause of the abnormal state has occurred. Can be pursued.

  Further, in the production line, the cause of the abnormal state that can be detected by the sensor 5 is considered to be the equipment upstream of the sensor 5. In such a case, as shown in FIG. 1, the process monitoring device 1 is installed at a position upstream of the sensor 5, but since past video data is stored in the process monitoring device 1, an important video is displayed. You can avoid missing photos. Alternatively, the cause of the abnormal state that can be detected by the sensor 5 is not necessarily in the upstream position of the sensor 5, but in the present embodiment, the video data after the signal input is also stored, so various factors are investigated. can do.

  Further, the process monitoring apparatus 1 has an integrated structure including a camera 11, a display unit 13, and a memory 107 (for example, a recording medium 16). Therefore, it is possible to take measures against a chocolate stop occurring in the production line with a simple configuration without requiring a large-scale system. As a result, the process monitoring device 1 can be provided at a lower cost than a large-scale system. In addition, when an abnormal state occurs, a past video can be confirmed immediately on the spot. In addition, when installing the process monitoring apparatus 1 on the site, the worker can also position the camera 11 while confirming the captured image of the camera 11 on the display unit 13.

  In addition, since the camera 11 has a wide-angle lens, it can be focused in a wide range, so that installation is easy. In addition, since the camera 11 is compatible with night vision, it can be used for process monitoring even in a dark place.

  The environmental conditions under which the process monitoring apparatus 1 can operate are temperature: 0 ° C. to 50 ° C. and humidity: 30% to 80%. Therefore, the process monitoring apparatus 1 can be applied to various FA (Factory Automation) sites.

  Moreover, the process monitoring apparatus 1 can respond to a DC power supply of 5V to 48V. Therefore, it can operate with various DC power sources existing at the production site. Note that the process monitoring apparatus 1 may be operable by supplying power from a USB (Universal Serial Bus) cable. In this case, a USB port (not shown) can also be used as a data communication port. Thereby, the process monitoring apparatus 1 can also be used as an external hard disk of an information processing apparatus such as a PC (Personal Computer).

  Moreover, since the process monitoring apparatus 1 has the detachable pin terminal connector 21 which can take in a signal from the outside, it is possible to use a pin terminal that matches the FA site. In addition, since the connector 31 of the detection device 4 can be easily attached and detached, the single process monitoring device 1 can be used for various processes.

  Moreover, since the recessed part 22 for the leg part 23 attachment is provided in the several surface (the upper surface 73, the lower surface 74, and the side surface 75) of the housing | casing 7, the optimal attachment method is selected according to an installation place. Can do.

  Further, since the moving image file is recorded on the removable recording medium 16, the data can be easily moved.

  In this embodiment, when the trigger signal is input, the storage processing unit 104 performs the overwrite prohibition process on the moving image file at the time of input and the moving image files before and after the input. It is not limited to such processing as long as it can be stored. For example, when the trigger signal is input, the storage processing unit 104 may copy the moving image file at the time of input and the preceding and subsequent moving image files into a folder created in another storage area in the memory 107. In this case, a folder may be created each time a trigger signal is input. By doing so, the subsequent video confirmation can be easily performed.

  Further, when a trigger signal is input, the storage processing unit 104 may write in the memory 107 viewer software of a moving image file that cannot be overwritten. In this way, when the recording medium 16 as the memory 107 is inserted into a PC (Personal Computer) for confirmation, only the moving image file to be verified can be easily browsed.

  In the present embodiment, the recording processing unit 102 creates a moving image file in units of one minute, but the user may be able to set the time length of the file. That is, the process monitoring apparatus 1 may further include a setting unit 108 (FIG. 4) for setting and changing the time length (set time) of the moving image file as its function.

  For example, the setting unit 108 displays a setting screen for setting the file time on the display unit 13 and sets the time length of the moving image file in accordance with the operation signal from the operation unit 12. Specifically, one may be selected from a plurality of set times (for example, 1 minute, 3 minutes, and 5 minutes). Thereby, since the set time can be selected according to the operation speed of the process 92 to be monitored and the distance between the process monitoring device 1 and the sensor 5, the cause of the chocolate stop can be easily found.

  Alternatively, the setting unit 108 may set the moving time of the workpiece W from the position of the process 92 monitored by the process monitoring apparatus 1 to the detection position of the sensor 5 as the time length of the file. Furthermore, according to the positional relationship between the process monitoring device 1 and the sensor 5 (distance, speed at which the workpiece reaches), it is possible to freely set the time that goes back from the trigger signal input time instead of the time length of the file. Also good. That is, video data (moving image file) that goes back a set time from the trigger signal input may be stored in the memory 107.

  Further, in the present embodiment, the detection device 4 includes the sensor 5 and the PLC 6, but the detection device 4 may be realized by only the sensor 5 without including the PLC 6. In this case, based on the sensor signal from the sensor 5, the CPU 10 of the process monitoring device 1 may determine whether there is an abnormal process state at the sensor position. That is, the function of the process monitoring device 1 may include a determination unit that determines whether there is an abnormal state.

  The process monitoring apparatus 1 described above may use a commercially available drive recorder. Thereby, manufacturing cost can be held down rather than making the process monitoring apparatus only for FA field from scratch. The drive recorder is a video recording device dedicated to an automobile having at least a camera and a memory for recording video, and a process of making a moving image file being recorded unwritable with the impact of the automobile detected by an acceleration sensor as a trigger. I do. This normal drive recorder may have the above functions.

  The process monitoring method in the present embodiment may be provided as a program. Such a program can be provided by being recorded on the computer-readable non-transitory recording medium 16 as described above. A program can also be provided by downloading via a network.

  The embodiment disclosed this time should be considered as illustrative in all points and not restrictive. The scope of the present invention is defined by the terms of the claims, rather than the description above, and is intended to include any modifications within the scope and meaning equivalent to the terms of the claims.

  1 process monitoring device, 4 detection device, 5 sensor, 7 housing, 10 CPU, 11 camera, 12 operation unit, 13 display unit, 14 built-in memory, 15 drive device, 16 recording medium, 17 timing unit, 18 I / F , 19 Power input unit, 20 LED, 21, 31 connector, 22 recess, 23 leg, 24 power source, 32, 33 cable, 91-93 process, 101 operation signal input unit, 102 recording processing unit, 103 trigger signal input unit , 104 Storage processing unit, 105 Playback instruction input unit, 106 Playback processing unit, 107 Memory, 108 Setting unit, 121 to 126 Operation buttons, W work.

Claims (6)

A process monitoring device for monitoring a process in a production line of a factory,
Photographing means for photographing the operating state of the process;
Display means for displaying the video imaged by the imaging means;
A memory for storing the video imaged by the imaging means as a moving image file in a set time unit;
Based on the video data photographed by the photographing means, recording processing means for overwriting a new video file over the old video file and recording it in the memory;
From the detection device installed in the production line, external input means for inputting as a trigger signal a signal generated when an abnormal state of the production line is detected ;
When the trigger signal is input, among the video files recorded in the memory, the video file being recorded in the memory when the trigger signal is input, the previous video file, and A storage processing means for storing the next moving image file in the memory as a video that cannot be overwritten ;
A case in which the respective means are provided integrally and the memory is detachably provided ;
In accordance with the positional relationship between the process monitoring device and the detection position of the abnormal state, comprising a time setting means for changing the set time ,
A process monitoring apparatus in which viewer software for browsing only a video file that cannot be overwritten is written into the memory by the storage processing means . Reproduction processing means for reading video data stored in the memory and displaying it on the display means when a reproduction instruction is input from a user;
Further comprising an informing means for informing whether the video or not the image displayed is a rewriteable by the display unit, process monitoring device of claim 1. An operation signal input means for inputting an operation signal of the process;
The recording processing means, in response to the operation signal is input by the operation signal input means, starts the recording process, process monitoring apparatus according to claim 1 or 2. Provided with an operation means provided in the housing for receiving an instruction input from a user;
The operation means comprises an operation button for inputting the trigger signal, process monitoring device according to any one of claims 1-3. Wherein provided on the housing, further comprising a connector for receiving a plug connected to a DC power source of the plant detachably, process monitoring device according to any one of claims 1-4. A process monitoring device for monitoring a process in a production line of a factory,
Photographing means for photographing the operating state of the process;
Display means for displaying the video imaged by the imaging means;
A memory for storing the video imaged by the imaging means as a moving image file in a set time unit;
Based on the video data photographed by the photographing means, recording processing means for overwriting a new video file over the old video file and recording it in the memory;
An external input means for inputting a sensor signal from a sensor installed in the production line and detecting an abnormal state of the production line ;
Determination means for determining the presence or absence of an abnormal state of the production line based on the sensor signal input to the external input means;
Among the moving image files recorded in the memory when the determination unit determines that the abnormal state is detected, the moving image file being recorded in the memory when the occurrence of the abnormal state is detected, and the previous moving image A storage processing means for storing the file and the subsequent video file in the memory as a video that cannot be overwritten ;
A case in which the respective means are provided integrally and the memory is detachably provided ;
In accordance with the positional relationship between the process monitoring device and the detection position of the abnormal state, comprising a time setting means for changing the set time ,
A process monitoring apparatus in which viewer software for browsing only a video file that cannot be overwritten is written into the memory by the storage processing means .

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