JP2985998B2 - Computer-aided work analysis device using video - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to work analysis and object movement analysis used in the field of IE (production engineering) and the like.
The present invention relates to a computer-aided work analysis device using video.

[0002]

2. Description of the Related Art In the field of conventional production engineering, it is common to record time using a stopwatch as shown in FIG. 11 in order to analyze a process or an operation state. In FIG. 11, a worker 103 is standing and working in front of a processing machine 101. While performing the processing work, the analyst 105 measures the time of each process or each work with the stopwatch 107 while watching the work state of the worker 103, and records the time on the recording paper 109. In the case of work analysis over a long period of time, an analysis target (the processing machine 101 and the worker 10 in FIG.
Observe 3), record the work contents, and perform statistical processing later.

[0003] Disadvantages of this method include (1) that the facts that the analyst misses are not permanently converted into data, (2) that events that can occur only once cannot be analyzed for multiple purposes,
(3) It is difficult for anyone other than those who have met the measurement to participate in the analysis. (4) The recorded data needs to be statistically processed by converting it again to a computer input format.
And the like.

[0004] FIG. 12 shows an example using video for the purpose of compensating for the drawback in FIG. 11, which is conventionally used. In FIG. 12, an operator 103 is standing and working in front of a processing machine 101. While performing the processing work, the processing work is photographed with the video camera 111,
The analyst 105 has a videotape 113 of the object to be analyzed.
To the video playback device 115, operate the stopwatch 107 while watching the video display 117, measure the time of each process or each operation, and record the time on the recording paper 1.
09.

[0005]

Among the above-mentioned prior arts, the method shown in FIG. 12 can improve the disadvantage of the method shown in FIG. 11, but (1) the stopwatch is operated while operating the video reproducing apparatus. Require the operation of
(2) It is necessary to convert the recorded data into a computer input format again. Such disadvantages have not been solved yet.

An object of the present invention is to solve the above-mentioned problems by storing a processing operation photographed by a video camera on a video tape as a recording medium, directly importing the processing operation to a computer using the video tape, and connecting the computer to the computer. To provide a computer-aided work analysis device using video that can perform work analysis, process analysis, work sampling, etc. with only the button operation of the input device that has been set, and can store the analysis data in a database in the computer. is there.

[0007]

SUMMARY OF THE INVENTION In view of the above-mentioned conventional problems, the present invention provides a recording medium that records a work state photographed by a camera and a time corresponding to the work state.
A reproducing device for reproducing the content recorded on the recording medium;
A menu area for displaying a plurality of operation buttons for operating the playback device and various analysis work classification buttons, an item button area for displaying a plurality of item buttons in the work selected by the analysis work classification button, and the above items Button to display the details of the item selected with the button
A display device in which a screen is divided into an area and a one-step forward / return button for analysis work and an image display area for displaying an image recorded on the recording medium, and a button for operating various buttons on the screen of the display device A mouse, an analysis work category selected from the menu area on the screen, and an analysis item and a detailed button selected from the item button area;
A computer main body including a storage device for storing the work item selected from the area and the time required for the work, and the time at which the current item in the item button area is selected and the next item are selected. And a work time calculation unit for calculating the time required for the work of the current item based on the time at the moment.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the embodiments shown in the drawings. FIG. 1 is an explanatory view showing an embodiment of the present invention, in which an operator 3 is standing and working in front of a processing machine 1. During the work, the work state is photographed by a video camera 5 capable of recording the time at the time of photographing, and recorded on a video tape 7 as a recording medium. The time or time code recorded on the video tape 7 is read by the video reproducing device 9. This video playback device 9 is connected to a computer main body 13 via an interface 11.

A display device 15, a keyboard 17 and a mouse 19 are connected to the computer body 13. The interface 11 and the video playback device 9 are connected by a control cable 21 for transmitting control signals, and the video playback device 9 and the computer main body 13 are connected by a video cable 23. The video image signal is sent to the main body 13.

FIG. 2 shows a magnetic medium 2 in a video tape 7.
It is a conceptual diagram of the recording area of No. 5. The recording area of the magnetic medium 25 includes a video signal recording area 27, an RC time code or a data code area 29 for recording date and time,
Index signal area 31, PCM audio recording area 3
3.

When the object to be analyzed is photographed by the video camera 5, the video is recorded on the magnetic medium 25 in the video tape 7 in the video signal recording area 27, and the sound is recorded in the PCM sound recording area 3.
3 and the time at that time is the data code area 2
9 recorded. This recording method itself is a known fact. This video tape 7 is loaded into a video playback device 9,
Under the control of software incorporated in the computer main body 13, a video signal is captured via the video cable 23 via the interface 11, and a data code is captured into the computer 13 via the control cable 21 via the interface 11.

FIG. 3 shows an embodiment of the display contents displayed on the display device 15. On the screen of the display device 15 in FIG. 3, a video image display area 35, operation buttons 37 of the video playback device 9, and a menu area 39 for selecting a classification of analysis work (for example, work analysis) (that is, various analysis work classifications). Button), an item button area 41 for the work selected by the analysis work classification button 39a, a detailed button area 43 for the item selected by the item button 41a, and a one-step forward / return button 45 for the analysis work. Is displayed.

For example, a case will be described in which a process analysis is performed in machining using a certain machine. When the photographed video tape 7 is loaded into the video playback device 9 and the computer body 13 is started, the display device 15
The display as shown in FIG. 4 is made.

Then, the analysis work classification area 39 on the screen
The process analysis button is designated by the mouse 19 from among
When the button of the mouse 19 is clicked, the video reproducing device 9 starts, and the reproduced video image is displayed in the video image area 35. At the same time, analysis items corresponding to the process analysis are displayed in the item button area 41.

The analyst looks at the video image, selects a work item name to be implemented from the item button area 41, and clicks with the mouse 19. The item name is a type of operation such as punching and bending. Next, the analyst looks at the image shown in the video image area 35, selects a corresponding work detail name (for example, work transport, bending work, etc.) from the detail button area 43 at a change in work, and clicks with the mouse 10. .

Then, the time recorded in the data code area 29 of the magnetic medium 25 is stored in the interface 11.
And the item name and the detailed button selected in the item button area 41.
The information is recorded in a storage device in the computer main body 13 together with the item name selected in the area 43.

In FIG. 4, a number setting button 47 for setting the number of workers for the item selected in the item button area 43 is displayed at the lower right of the screen. FIG. 5 shows the structure of the data recorded in the storage device as a result of the process analysis work, and FIG. 6 shows the analysis work performed by selecting the category of workflow in the analysis work classification area 39. As a result, a description of the structure of data recorded in the storage device is shown. FIG. 7 shows a description of the structure of data recorded in the storage device as a result of performing an analysis operation by selecting the category of human flow, and FIG. 8 also shows a category of environmental data. , The description of the structure of the data recorded in the storage device as a result of performing the analysis work.

Taking the process analysis as an example, the corresponding work name is clicked with the mouse 19 from the detailed button area 43, and
When the number of workers at that time is set by the number-of-workers setting button 47, the process analysis record area in the storage device stores data as shown in FIG. 5, namely, the work details and the time required for the work. The number of workers who have performed the work is recorded. The time T required for the work is calculated by the work time calculator provided in the computer body 13 as follows.

T = T2−T1 T2: Time at the moment when the next item is selected T1: Time at the moment when the current item is selected By simply doing so, a series of process analysis data as shown in FIG. 5 is recorded. If the user wants to perform operations such as stop, start, rewind, and fast-forward the video in the middle of the operation, he or she can click the video operation button 37 with the mouse 19. Unlike the normal video operation, in the present apparatus, the button 45 can be used to return the analysis work by one step and to move forward by one step.

Here, if there is an operation error during the analysis work, one-step operation of this analysis work will
The video tape 7 and the record pointer of the data recorded in the storage device can be synchronously returned to the location where the error occurred, so that the correction work can be easily performed without breaking the time series of the analysis work. I have.

When another category is selected in the analysis work classification area 39, the workflow data and the human flow data as shown in FIGS.
Data and environmental data can be recorded in a storage device in the computer main body 13.

FIG. 9 is an explanatory diagram of another embodiment of the present invention, in which the absolute time (hour,
The embodiment in which the function of recording minutes (minutes, seconds) is not provided is described. In FIG. 9, the same components as those in FIG. 1 are denoted by the same reference numerals, description thereof will be omitted, and different points will be described.

The video tape 7 photographed by the video camera 5 having no absolute time recording function is reproduced by a general video reproducing device 49 having no time reproducing function. The video playback device 9 and the video playback device 49 are connected to the connection cable 5
1 for dubbing. Shooting an object to be analyzed with the video camera 5 is the same as in FIG. 1, but the video tape 7 after shooting is loaded into the video playback device 49 and dubbed with the video playback device 9 capable of recording time. Video tape 53 recording the RC time code or time together with the image
Create once.

However, in this case, the time does not mean the absolute time at the time of shooting, but merely indicates the time since the video reproducing apparatus 9 started dubbing to the video tape 53. The recorded state of the magnetic medium 25 on the video tape 53 after dubbing is exactly the same as that shown in FIG.
By rewinding 3 and connecting and starting the video playback device 9 to the computer main body 13, the analysis work can be performed in exactly the same manner as described with reference to FIGS.

FIG. 10 is an explanatory view of another embodiment of the present invention.
The case of the C time code is described.

In FIG. 10, parts that are the same as the parts shown in FIG. 9 are given the same reference numerals, and descriptions thereof will be omitted. That is,
In FIG. 10, a reversible counter 55 is provided in the computer main body 13. The reversible counter 55 includes time counters 57A and 57 for each process.
B, 57C are connected. An RC time code 59 is recorded on the magnetic medium 25.

The interface 11 reads the RC time code 59 recorded on the magnetic medium 25, and passes the RC time code 59 to the reversible counter 55 in the computer main body 13 by a pulse 61. It is assumed that the RC time code 59 is recorded in the data code area 29 of the magnetic medium 25 instead of the absolute time. The video tape 53 is loaded into the video playback device 9 and the system is started.

The display contents of the video image display area 35 of the display device 15 are exactly the same as the contents described in FIG. 4, but in the case of the embodiment shown in FIG. It is transmitted to the reversible counter 55. Start signal START when the video operation start button 37 is pressed
Hits the interface 11 and the video tape 53
Starts to read the RC time code 59 on the magnetic medium 25, converts it into a pulse 61 and sends it to the reversible counter 55. In the reversible counter 55, S
The pulse 61 after the input of the TART signal is counted.

On the other hand, in the process detail button area 57, the process A
When the button is pressed, the signal STARTa strikes the process A counter 57A, and the integrated value at that moment is read from the reversible counter 55. The integrated value at the time of STARTa is set to t1. When the stop button 37B of the video operation button 37 is pressed, a stop signal STOP is sent to the interface 11, and the running of the video tape 53 is stopped, and the reading of the RC time code 59 on the magnetic medium 25 is also stopped. The pulse count of the reversible counter 55 also stops, and the start signal STA
This means that the time since RT was entered is held.

Similarly, the stop signal STOPa strikes the step A counter 57A, and the value of the reversible counter 55 at that moment is read. The integrated value at the time of this STOPa is defined as t2. In the process A counter 57A, the integrated value t2
Take the difference, it calculates the _A T ₁ = t2-t1. The _A T ₁ refers to the work time required for the step A.

When the video tape 53 is continuously running and another process button (for example, process B) is selected in the process detail button area 57, the signal is START.
The signal b serves as a start signal for the step B counter 57B and also operates as a stop signal for other step counters. That is, the STOPa signal is input to the process A counter. That is, STOPa = STOP. OR. STARTb. OR. STARTc. OR. ……. OR. STARTn.

[0032] Thus, the content of step A counter 57A will become possible to calculate the time _A T ₁ during which the step A is selected, another step counter is the same.

As described above, a series of process analysis data similar to that shown in FIG. 5 is recorded. Therefore, work analysis, process analysis,
Work sampling can be performed. Analysis work can be performed on only one screen. Even an event that can occur only once can be used as an analysis target many times. The analysis result is stored in a data bank in the computer main body 13. Furthermore, the analysis results can be automatically statistically analyzed and represented in a chart.

[0034]

As will be understood from the above description of the embodiment, in the present invention, the screen of the display device 15 is a recording medium in which the work state photographed by the camera and the time corresponding to the work state are recorded. Playback device 9 for playing back 25
A menu area 39 for displaying a plurality of operation buttons 37 for operating the user, various analysis work classification buttons 39a, an item button area 41 for displaying a plurality of item buttons 41a, and a fine button area 43 for displaying fine details. One step forward / return button 45 for analysis work and an image display area 35 for displaying an image recorded on the recording medium 25
When a desired analysis work classification in the menu area 39 on the screen, a desired analysis item in the item button area 41, and a desired work item in the detailed button area 43 are operated by the mouse 19, the fine button Based on the time at which the current item of the area 43 is selected and the time at which the next item is selected, the time required for the work of the current item selected in the work item is automatically set by the operation time calculation unit. The calculation is performed, and the desired analysis work classification, the desired analysis item, the desired work item, and the calculated time are associated with each other and stored in a storage device provided in the computer main body 13.

Therefore, according to the present invention, the time required for the work of the selected work item is automatically calculated by the work time calculation unit only by selecting the work item in the detailed button area 43 with the mouse 19. Therefore, there is no need to calculate the working time again, and efficient analysis can be performed.

Further, according to the present invention, necessary analysis such as work analysis and process analysis is automatically performed by operating necessary operation buttons displayed on the screen while watching the screen display of the display device 15. Is what you can do.

Further, in the present invention, one of the analysis operations is performed.
Since the step forward / return button 45 is displayed on the screen of the display device 15, if there is an operation error in the middle of the analysis operation, it can be returned to the place where the error occurred, and the correction operation can be easily performed. is there.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram showing an embodiment of the present invention.

FIG. 2 is a conceptual diagram of a video tape recording area in the embodiment of the present invention.

FIG. 3 is a diagram showing an example of display contents displayed on a display device.

FIG. 4 is a diagram showing a specific example of each area displayed on the display device.

FIG. 5 is a diagram showing an example of process analysis data which is one of analysis data stored in a computer.

FIG. 6 is a diagram showing an embodiment of workflow data which is one of analysis data stored in a computer.

FIG. 7 is a diagram showing an example of human flow data which is one of analysis data stored in a computer.

FIG. 8 is a diagram showing an embodiment of environment data which is one of analysis data stored in a computer.

FIG. 9 is an explanatory view showing another embodiment of the present invention.

FIG. 10 is an explanatory view showing another embodiment of the present invention.

FIG. 11 is an explanatory diagram illustrating a conventional work analysis.

FIG. 12 is an explanatory diagram illustrating a conventional work analysis using a video.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Processing machine 3 Worker 5 Video camera 7 Video tape 9 Video reproduction device 11 Interface 13 Computer main body 15 Display device 17 Keyboard 19 Mouse 25 Magnetic medium

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Claims (1)

(57) [Claims] 1. A recording medium recording a work state photographed by a camera and a time corresponding to the work state.
A playback device (9) for playing back the content recorded on the recording medium (25); a plurality of operation buttons (37) for operating the playback device (9); and various analysis work classification buttons (39a). ) And an item button for displaying a plurality of item buttons (41a) in the work selected by the analysis work classification button (39a).
An area (41) and a sub-button area (4) that displays sub-items in the item selected by the item button (41a)
3) and one-step forward / return button for analysis work (45)
A display device (15) whose screen is partitioned into an image display area (35) for displaying an image recorded on the recording medium (25), and various buttons on the screen of the display device (15) for operation. The mouse (19), the analysis work category selected from the menu area (39) on the screen, and the analysis item selected from the item button area (41) and the analysis item selected from the detailed button area (43) A computer main body (13) including a storage device for storing the work details and the time required for the work; and a time at which the current work in the fine button area (43) is selected and a next work are selected. A computer-aided work analyzing apparatus, comprising: a work time calculator for calculating a time required for the work of the current item on the basis of the time at the moment of the execution.