JP3698328B2 - How to protect data entry - Google Patents

Description

[0001]
[Industrial application fields]
The present invention relates to a data input protection method when data is input to a central control apparatus from a plurality of terminal devices in an assembly and inspection line of a production factory.
[0002]
[Prior art]
For example, when an operator of each assembly line can smoothly carry out the work when the vehicle is completed and during assembly, quality control of the vehicle quality information is performed from a number of terminal devices installed beside the line. It is important to be able to file in the system, and various quality information network management methods have been proposed.
[0003]
FIG. 3 is a diagram for explaining an example of a conventional method in which an operator files quality information at any time for quality control . FIG. 3A schematically shows a flow of the procedure, and FIG. FIG. 3 (c) schematically shows a general apparatus using this conventional method, and FIG. 3 (d) shows the format of information to be input.
[0004]
In this method, first, an operator activates a display device CRT that displays quality information and an input terminal device PC that controls the display device CRT, and these devices CRT are sent to the server SV via a local area network LAN. , Stage 101 of preparation for connecting the PC, and then, starting up the quality control system SYS formed on the local area network LAN from these devices CRT and PC, and displaying the initial screen on the display device CRT. Stage 1 of setting 1.
Next, the quality information described in the inspection result table is input to the quality management system SYS by the input terminal device PC, the stage 103 of entry 1, and the production management system for managing the production plan and production process in the factory, And Report 1 stage 104 for transporting this input quality information by a portable storage medium.
[0005]
In step 103 of entry 1, an operation to be processed is selected from the menu screen on the display device CRT and given to each vehicle, and an identification number indicating the vehicle body number of each vehicle is obtained from the inspection result table by the barcode reader BR. Each of the assembled vehicles is read while setting the header ID and referring to the identification number input process to be displayed in the identification number area B in the display device CRT and the message area M prompting key input. The quality information code QC is sequentially keyed from the input device DS for each element from the inspection result table for each vehicle, and the quality information character string QCH is displayed in the entry area E each time. First of all.
[0006]
Subsequently, these input codes QC are collected for each vehicle-specific information unit IU, and the information unit IU is filed in the input file of the server SV, and the character string QCH is input to the input area IW in the display device CRT. And an arrangement process for arranging and displaying the quality information input by key, and a correction process for individually correcting the input file as necessary.
[0007]
The stage 104 of the report 1 includes an accumulation process for storing an arbitrary amount of information unit IU on a magnetic disk (not shown) on the server SV, and adds an additional measure necessary for the inspection result of the assembled vehicle. Stored on this magnetic disk and brought into the production management system installed at a different location in the factory as needed by the operator, aggregates all input files, classifies them, and creates a statistical table of the inspection results for the day It is supposed to be.
In FIG. 3 , C is a coupling device for connecting the input terminal device PC to the LAN, and is connected to the server SV via the LAN together with the other input terminal device PC and a transfer device (not shown). A SYS is formed.
[0008]
[Problems to be solved by the invention]
By the way, when data is input using the above-described conventional method and apparatus for managing quality information, there are the following problems.
In the LAN server, as shown in FIG. 4 , data written from a terminal device on the network is temporarily written in a cache buffer of the server. The cache buffer is written to the server's hard disk when the cache buffer is full or when the file being written is closed.
In order to shorten the processing time, the quality input terminal of the quality information system does not close the file until the input processing ends when the file is opened at the time of starting the system. Further, since the amount of data to be written is several tens of bytes, all data in the cache buffer is lost when the server goes down.
[0009]
SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a data input protection method which is configured so that even if a server goes down, all data in the cache buffer is not lost, thereby solving the above-described problems. Is.
[0010]
[Means for Solving the Problems]
The present invention has been made in view of the above circumstances, and a plurality of terminal devices for inputting / outputting data in an assembly and inspection line of a production factory, and a centralized control device connected to the plurality of terminal devices In a quality management system that stores a file in the storage means when the file in the temporary storage means is closed, the storage means stores data input / output by the plurality of terminal devices in the temporary storage means Data input protection method to be stored in
Apart from the operation by the terminal device in a state where any one of the files remains open in the temporary storage unit, the central control unit deletes the file in the temporary storage unit at regular intervals. To read the data of the predetermined byte of the file, write the read data to the predetermined byte of the file again, and close the file so that the file in the temporary storage means is read at regular intervals. Data is written in the storage means.
[0011]
[Action]
Based on the above configuration, according to the present invention, the centralized control device opens the file in the temporary storage unit at regular intervals, reads the predetermined byte of the file, and reads the read data again to the predetermined byte of the file. writes to the eye, by closing the file, written into the storage means the data of the files in the temporary storage means at predetermined time intervals.
[0012]
【Example】
An embodiment according to the present invention will be described below with reference to the drawings.
FIG. 1 is a diagram for explaining an embodiment according to the present invention, in which the same parts as in the conventional example are omitted.
FIG. 1A shows an operation flow in the input terminal device, and FIG. 1B schematically shows a memory configuration in the input terminal device and the server.
[0013]
In FIG. 1A, the main part of this embodiment is a setting 2 stage 102a for setting the operation mode of the input terminal device based on the state of the quality control system SYS described above, and a predetermined value for each vehicle. An entry 2 stage 103a for receiving quality information, creating an input file, and updating the history of the input file is provided in this order.
[0014]
Subsequently, the report 104 stage 104a is also provided to combine the input files into a comprehensive file . Each of the setting 1, entry 1 and report 1 in the conventional example shown in FIG. Steps 102, 103, and 104 are replaced with respective steps 102a, 103a, and 104a of setting 2, entry 2, and report 2, respectively.
[0015]
In FIG. 1B, the input terminal device PC has a status register SR having flags F1 and F2 for displaying status information in the main memory, and the server SV adds an attribute for classification by input terminal device. Using an external memory such as a hard disk device, an item file KF (not shown) that arranges the items described above, an input file IF that files quality information and transfers it to the production management system SYSA, and a history file RF that manages the history. Provided in the file memory.
[0016]
Therefore, the quality information is written in the input file IF and the status information for management is written in the history file RF through the cache buffer of the server SV that temporarily holds the data input from the input terminal device PC. It is like that.
[0017]
In FIG. 1C, the networks LAN1 and LAN2 that file the quality information of each assembly line in the quality management system SYS are connected to the entire production plan via relays RL1 and RL2 that transmit signals with matching transmission speeds. And is connected to a network NW of a production management system SYSA for notifying each production process in the factory of quality information on vehicle assembly, and exchanges various information with this production management system SYSA. Be able to.
[0018]
The network LAN1 of the quality management system SYS has the input terminal device PC1 installed in the final process of vehicle assembly and the input terminal device PC2 installed in the final process of final inspection, and further the quality information to the network NW of the production management system described above. A transfer terminal device TF for controlling the transfer of the information is provided, and the quality information input files stored in the server SV are collectively transferred to the production management system SYSA. Note that LAN1 and LAN2 have substantially the same configuration and operation.
[0019]
The network NW of the production management system installs the input terminal device PC3 in the painting process, for example, and installs the other input terminal devices PC4 and PC5 in other intermediate processes of vehicle assembly and connects to this network NW. The input terminal devices PC3, PC4, and PC5 are respectively keyed in the progress of the assembly work of the new vehicle and the repair work of the side-by-side vehicle that requires repair. It can be managed.
[0020]
The production management system SYSA holds the customer's required specifications indicating the configuration, form, exterior, etc. of the vehicle for each identification number described above, and creates a production plan at the factory according to the production request from the sales department. However, from assembly of parts to production and maintenance after shipment can be managed for each assembled vehicle.
[0023]
Next, the operation of the embodiment of the data input protection method according to the present invention will be described with reference to the flowchart of FIG . The situation in which this operation is performed is the same as the situation in the conventional case shown in FIG.
Since the server operating system is OS / 2, a plurality of programs can be operated simultaneously.
First, when the program is started (step 201), it is determined whether or not the ESC key is pressed (step 202). If the ESC key is not pressed (NO) , the quality data file is stored in the cache buffer. It is confirmed whether or not exists (step 203).
[0024]
If the quality data file exists in the cache buffer in step 203 (YES), the quality data file is opened (step 204), the first byte data of the quality data file is read (step 205), Whether the quality data file is stored in the hard disk of the server by writing the read data in the first byte of the quality data file (step 206) and closing the quality data file (step 207), and then the ESC key is pressed It is determined whether or not (step 208), and if the ESC key is pressed (YES), the program ends (step 209).
[0025]
If the ESC key is pressed in step 202 (YES), the program proceeds to step 209 and the program ends.
If the quality data file does not exist in the cache buffer in step 203 (NO), the determination is repeated until the quality data file exists in the cache buffer (YES).
On the other hand, if the ESC key is not pressed (NO) in step 208, a time of 1 minute (a fixed time) is waited (step 210), and the process proceeds to step 202 repeatedly until the ESC key is pressed.
[0026]
Therefore, it is possible for the input terminal to write the contents of the server's cache buffer to the hard disk at regular intervals while the quality data file remains open, and as a whole quality information system without reducing the performance at the input terminal. Even if the unexpected trouble that the server goes down occurs, it is possible to construct a system with little possibility of data loss.
[0027]
Incidentally, in the above embodiment to read the data of the first byte, it has to write, read data of a predetermined byte, writing in may also, as a matter of course.
Although in the above-described embodiment is intended to implement in a production plant of the vehicle manufacturing, etc. It may be one carried out in the general production plant other than a vehicle production, other, without departing from the gist of the present invention Of course, various changes can be made in the range.
[0028]
【The invention's effect】
As described above, according to the present invention, the terminal device can write the file data in the temporary storage means to the storage means at regular intervals while the file remains open. Even if the central control apparatus goes down without reducing the data, the possibility of data loss can be reduced and the data input can be protected.
[Brief description of the drawings]
FIG. 1 is an explanatory diagram for explaining an embodiment of a quality information system to which the present invention is applied.
FIG. 2 is a flowchart showing the operation of an embodiment of the data input protection method according to the present invention.
FIG. 3 is an explanatory diagram for explaining an example of a conventional method for managing quality information;
FIG. 4 is an explanatory diagram showing a conventional data input method.
[Explanation of symbols]
102a setting 2 stage 103a entry 2 stage 104a report 2 stage PC1, PC2,... Terminal device SV server SYS quality management system LAN1, LAN2 network

Claims (1)

A plurality of terminal devices for inputting / outputting data in an assembly and inspection line of a production factory, and a centralized control device connected to the plurality of terminal devices, and when a file in the temporary storage means is closed In the quality control system for storing the file in the storage means, a data input protection method for storing in the storage means data input / output in the plurality of terminal devices in the temporary storage means,
Apart from the operation by the terminal device in a state where any one of the files remains open in the temporary storage unit, the central control unit deletes the file in the temporary storage unit at regular intervals. To read the data of the predetermined byte of the file, write the read data to the predetermined byte of the file again, and close the file so that the file in the temporary storage means is read at regular intervals. A data input protection method comprising writing data into the storage means.

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