KR101099667B1 - Character marking method - Google Patents

Abstract

A character marking method is disclosed. In the character marking method according to the present invention, when the ink head is moved once in one direction, setting a markable area as a block, setting a block overlapping area where two neighboring blocks overlap each other, Determining whether the character string to be marked is marked beyond one block to the neighboring block, and marking the character on the object according to the determined result. Can be improved.

Steel plate, character, marking, block, block nesting area

Description

Method for marking character}

The present invention relates to a method for marking characters on a steel sheet or the like, and more particularly, to a character marking method capable of improving marking quality when marking characters on a steel sheet using a mobile automatic marking apparatus.

A large amount of steel plate is required to manufacture one vessel. The steel sheet can be efficiently managed by marking a letter containing information on the steel sheet.

In particular, the automatic marking device has recently been mainly used for marking characters on steel sheets because the marking speed can be increased and the number of work can be reduced if the texts containing information on the steel sheets can be automatically marked. do.

Automatic marking devices are largely classified into fixed automatic marking devices and mobile automatic marking devices.

First, the fixed automatic marking apparatus will be described. The fixed automatic marking apparatus will mark characters while the ink head is fixed.

In order to mark the characters with the ink head fixed as described above, the fixed type automatic marking device includes a conveyor roller for moving the steel sheet processed by the pretreatment unit to the ink head side, and a steel material for detecting the type of steel sheet conveyed by the conveyor roller. It includes a sensor and an ink head for printing the marking on the steel plate.

The ink head is fixed to the frame, and the controller controls the on / off of the ink nozzle corresponding to the position of the character to be marked among the ink nozzles provided in the ink head to simultaneously spray ink onto the steel sheet.

However, the stationary automatic marking device uses a costly ink head installed in the entire width direction region of the steel sheet, and therefore, requires a high cost.

In addition, since the ink head is provided with a large number of ink nozzles, the ink nozzles are frequently clogged.

In order to compensate for such drawbacks, a mobile automatic marking device has appeared.

The movable automatic marking device moves the ink head having a width smaller than the width of the steel sheet in the left and right directions to mark characters.

The mobile automatic marking apparatus may have an ink head having a small area, thereby reducing the apparatus cost, and having a small number of ink nozzles may solve the problem of frequently clogging the ink nozzles.

However, the mobile automatic marking apparatus marks characters by moving the ink head in a direction perpendicular to the direction in which the steel sheet moves. When the ink head cannot move and mark a character string indicating the information of the steel sheet, the character string is divided. Should be printed.

When the ink head prints the character string representing the information of the steel sheet in this manner, conventionally, as shown in FIG. 1, a step occurs in the character string, so that the user does not grasp the character string or takes a long time to grasp the character string. There was an issue that took this.

The present invention provides a character marking method capable of improving the marking quality of a character string representing information of a steel sheet.

In the character marking method according to the present invention, in the character marking method of marking a character on an object by moving an ink head, setting a markable area as a block when the ink head is moved in one direction and neighboring each other; Setting a block overlap region in which two blocks overlap each other; determining whether a string to be marked on the object is marked beyond one block to a neighboring block; and according to the determined result Marking the character.

In this case, in the marking of the character according to the determined result, when it is determined that the character string to be marked on the object is marked only in one block, all of the character strings may be marked on a preset coordinate.

Meanwhile, in the step of marking a character according to the determined result, when it is determined that the character string to be marked on the object is marked beyond one block to the neighboring block, a part of the character string is marked in one block and the rest is marked. Some can be split and marked in neighboring blocks.

In this case, the method may further include calculating coordinates of the first marked character among the divided strings that are divided in the string and marked in the neighboring block.

The strings may be classified into groups based on the arrangement and direction of the strings marked on the object before determining whether the string to be marked on the object is marked beyond one block to the neighboring block.

The method may further include determining whether the block to be marked is the first block when classifying the strings into groups.

On the other hand, the block overlap region is preferably determined in consideration of the maximum character size to be marked, the character string angle, the tilt deformation of the moving steel sheet.

According to the character marking method according to the present invention, it is possible to solve the problem that a step occurs in some characters of the character string representing the information of the steel sheet.

Hereinafter, a description will be given of a text marking method according to an embodiment of the present invention, after referring to the accompanying drawings for a mobile automatic marking apparatus for executing the text marking method according to an embodiment of the present invention.

Figure 2 is a schematic diagram showing the overall configuration of a mobile automatic marking device.

As shown in FIG. 2, the mobile automatic marking apparatus in which the character marking method according to an exemplary embodiment of the present invention is executed includes a conveyor roller 1 for automatically transferring a steel plate and a steel plate transferred by the conveyor roller 1. The steel sensor 2 which detects the carrying-in state and the form of this, and the marking apparatus part 3 which mark the character string which shows the information of a steel plate on the moving steel plate are provided.

In addition, the mobile automatic marking device includes a control unit 4 which collects various control devices in one place, an operation unit 5 which receives contents to be marked on a steel sheet and generates output data to be transmitted to the control unit 4, and a pretreatment process. It is provided with the process control part 6 which determines the kind of steel plate injected.

3 shows a detailed configuration of the marking device unit 3 for implementing a character marking method according to an embodiment of the present invention among the components of the portable automatic marking device. Hereinafter, the marking device will be described with reference to FIG. 3. The wealth will be described in detail.

At this time, in the following description, in order to make the description clear, the width direction of the marking device unit 3 in the X-axis direction, the longitudinal direction of the marking device unit 3 in the Y-axis direction, the marking device unit 3 Define the height direction of Z in the Z-axis direction.

Referring to FIG. 3, the marking device 3 includes a guide shaft 10 which is formed to move in the Y-axis direction on the base 8 through which the steel sheet to be marked passes, and on the guide shaft 10. The carriage 11 provided to be movable, the X-axis motor 12 provided on one side of the carriage 11 to move the carriage 11 to the left and right, and dual to one side of the carriage 11 A movable ink head 13 mounted in a manner, a Z-axis motor 14 for moving the movable ink head 13 up and down, and a Y-axis motor 15 for moving the guide shaft 10 in the Y-axis direction. Include.

Accordingly, the movable ink head 13 of the marking device unit 3 can move in any of the X, Y, and Z axes by driving the X, Y, and Z axis motors 12, 14, and 15. .

On the other hand, the control unit 4 for controlling the marking device unit 3 is a marking information conversion program for converting text information into graphic information, a graphics control system according to the change in the marking position, and controlling the marking device unit 3 It comprises a marking apparatus part control program, various sensor control programs, etc. which control various sensors. In addition, the controller 4 controls the operation of the movable ink head 13 by controlling the respective shaft motors 12, 14, and 15 based on the information of the marking information conversion program and the marking device unit control program.

Referring to the operation of the mobile automatic marking device according to the configuration as described above are as follows.

First, the content to be marked on the steel sheet is input to the operating unit (5). The process control unit 6 then feeds the steel sheet to be marked onto the conveyor roller 1.

The injected steel sheet is moved by the conveyor roller 1, and the information of the steel sheet being moved is input to the steel sensor 2. At this time, the steel sensor (2) sends the information of the recognized steel sheet to the operating unit 5, the operating unit 5 generates the output data corrected the output content by the input information to the control unit (4) Send to.

Then, the control unit 4 controls the marking device unit 3 to mark the movable steel head 13 on the steel plate being moved by the conveyor roller 1.

In particular, the operation unit 5 receives the information measured in real time through the various sensors and CCTV to the state of the steel plate moving on the conveyor roller 1 by adjusting the position and angle of the content to be marked by the controller ( 4) to send.

Hereinafter, a flow chart shown in FIG. 4 and an example of each step shown in FIGS. 5 to 8 will be described with respect to a method of marking characters by controlling the ink head 13 of the marking device unit 3 by the controller 4. It demonstrates in detail with reference.

Referring to FIG. 4, the controller 4 sets a markable area as a 'block' when the ink head 13 of the marking device unit 3 moves once in one of the left and right directions with respect to the Y axis. (S10). In the following description, the lower end of each block is defined as the 'front' of the block, and the upper end of each block is defined as the 'back'.

For example, referring to FIG. 5, if the length of the ink head 13 in the Y-axis direction is 987 mm, the length in the Y-axis direction of one block is also 987 mm.

Next, when the character string to be marked on the steel sheet exists over two or more blocks over one block, the control error that occurs when the controller 4 controls the ink head 13 and the moving steel sheet are left and right directions. As shown in FIG. 4, a block overlap region is set to prevent the identification of characters marked at the boundary between blocks from deteriorating due to an error occurring due to movement.

Here, the "block overlap area" refers to an area where two neighboring blocks overlap so that the ink head 13 can overlap and print characters.

At this time, if the range of the block overlap region is set too wide, the number of times that the ink head 13 needs to reciprocate left and right in order to mark a character string on one steel sheet increases, and if the overlap region is set too narrow The size of the characters that make up the string to be marked on the steel sheet should be small.

Therefore, in setting the block overlap region, the range of the block overlap region should be set in consideration of the maximum character size to be marked, the character string angle, and the tilt deformation amount of the moving steel sheet.

In this embodiment, the Y-axis length of one block is defined as 987 mm, and the block overlap region at this time is set to approximately 37 mm.

According to this embodiment, in the first block in which the ink head 13 moves for the first time, the block overlap region exists only at the front end, but in the second and subsequent blocks, the block overlap region exists at the front and rear ends.

Therefore, as shown in FIG. 5, when the Y coordinate of the front end of the first block is set to 0, the Y coordinate of the rear end of the first block becomes 987 which is the length of the ink head 13. The Y coordinate of the front end of the second block is 950 minus 37, the length of the block overlapping area, from 987 which is the Y coordinate of the rear end of the first block.

The Y coordinate at the end of the second block is 1937 by adding 987, the length of one block, from 950, the coordinate at the front of the second block.

In this way, the Y coordinates of the front and rear ends of the block can be calculated in the Nth block. In addition, the Y coordinate of the front end of the block inherent region of the Nth block and the rear end of the block inherent region of the Nth block can be calculated.

In FIG. 5, the N-th block is described as an example, where ① is the Y-coordinate at the front of the N-th block, ② is the Y-coordinate at the rear of the N-th block, and ③ is the Y-coordinate at the front of the block-specific region of the N-th block. ④ is the Y coordinate at the end of the block-specific area of the Nth block.

After setting the block overlap area as described above, the controller 4 determines whether the character string to be marked on the steel sheet is marked beyond one block to the neighboring block (S30).

At this time, the marking device part control program allows the controller 4 to determine whether the character string marked on the steel sheet is marked beyond the one block to the neighboring block. It is preset to be classified by this group.

More specifically, referring to FIG. 6, the A group is classified into the F group according to the arrangement and the direction of the character string that may exist from the first block to the Nth block. In FIG. 6, the length of the arrow indicates the length of the character string, and the direction of the arrow indicates the direction in which the human character reads the character string.

In this case, a specific criterion for classifying the character string into groups may be, for example, how many blocks are to be marked with the character string, whether the character strings belong to the block overlapping region, or whether the character string is moved to another block. Can be.

Next, a method of classifying the character string illustrated in FIG. 6 by group will be described with reference to FIG. 7.

First, the ink head 13 determines whether a block (hereinafter, referred to as a work block) to which a character string is to be marked is the first block. (S100)

If the work block is the first block, it is determined whether the strings are all in the first block. (S110)

In this case, if all the strings are present in the first block, they are classified into group A. If all of the strings are not present in the first block, they are classified into group B.

If the work block is not the first block, it is determined whether all strings exist in a block overlap region with the previous block. (S120)

In this case, if all the strings exist in the block overlap region with the previous block, the C group is classified. If all the strings do not exist in the block overlap region with the previous block, it is again determined whether all the strings exist in the N-th block. (S130)

If all strings exist in Nth block, they are classified into D group.

If all strings are not present in the Nth block, it is determined whether the string is passed from the Nth block to the previous or next block. (S140)

At this time, if the string goes from the Nth block to the next block, it is classified into E group, and if it is moved to the previous block, it is classified into F group.

In this way, the coordinates of the character string are rearranged according to the character string classification criteria classified into groups A to F.

Hereinafter, a method of rearranging a string for each classified group (A-F group) will be described.

1) Group A: Place the character string at the preset coordinates of the first block.

2) Group B: Relocate the string coordinates in the following order.

-Search for the first character in the string beyond the end of the first block (hereinafter referred to as the 'S' character).

-From the first character of the string to the character immediately before the Sth character (S-1th character), it is placed in the preset coordinates in the first block.

-From the first letter (S) beyond the end of the first block to the end of the string, the coordinates marking the letter S are recalculated and placed in the second block.

3) Group C: place the character string at the preset coordinates of the N-1th block.

4) Group D: Place the character string at the preset coordinates of the Nth block.

5) Group E: Relocate the string coordinates in the following order.

-Search for the first character in the string beyond the end of the Nth block (hereinafter referred to as the 'S' character).

-From the first character of the string to the character immediately before the Sth character (S-1th character), the Nth block is placed in the preset coordinates.

-From the first letter (S) beyond the end of the Nth block to the end of the string, the coordinates marking the S letter are recalculated and placed in the next block (N + 1st block).

6) Group F: Relocate the coordinates of the string in the following order.

Search for the first character in the string beyond the front of the Nth block (hereinafter referred to as the 'S' character).

-From the first character of the string to the character immediately before the Sth character (S-1th character), the Nth block is placed in the preset coordinates.

-From the first letter (S) beyond the front end of the Nth block to the end of the string, the coordinates marking the S letter are recalculated and placed in the N-1th block.

As described above, when it is determined that the string is marked only in one block, such as A, C, and D groups, the controller 4 marks all the strings at preset coordinates (S40).

In the case where it is determined that the character string is marked from the Nth block to the next block (N + 1st block) or the previous block (N-1st block) like the B, E, and F groups in the above, the control unit 4 is N. The character passed in the first block is divided into the character string marked in the Nth block and marked in the next block (N + 1st block) or the previous block (N-1th block) (S50).

As described above, when it is necessary to divide and mark a part of the string in the N-th block, the coordinates of the first marked character among the divided strings marked in the neighboring block by dividing in the string are calculated (S60).

On the other hand, the method of obtaining the start coordinates of the character string to be divided and marked in the N-th block uses the size of the characters constituting the character string, the distance between the centers of the characters, and the angle of the character with the X axis or the Y axis.

More specifically, as shown in FIG. 8, when the starting coordinates at which the character string is to be marked are (Xo, Yo), D among the letters constituting the character string is a block overlapping area of the Nth block and a block of the N + 1st block. It is located at the boundary of the unique area.

Therefore, EFG, which is the letter D and the letter after D, is divided and marked in the N + 1th block.

At this time, when dividing and marking the string DEFG, the formula for obtaining the coordinate of D, the first character of the dividing and marking string, is as follows.

X = Xo + Cosθ, character size, number of characters

Y = Yo + Sinθ, character size, number of characters

Where (X, Y): start coordinates of the divided string, (Xo, Yo): start coordinates of the string,

θ: the angle formed between the X axis and the axis formed by the character string,

Character size: the distance between the center of one character and neighboring characters,

Number of characters: indicates the number of characters from the first character of the string to the previous character of the character that advances to the next block.

In the above equation, the value multiplied by the number of characters becomes the distance L between the center of the first letter A of the character string and the center of the first letter D to be divided and marked.

The value obtained by multiplying this distance L by Cosθ becomes X1 which is an increment of the X axis coordinates, and the value multiplied by Sinθ by this distance becomes Y1 which is an increment of the Y axis coordinates.

Therefore, by adding such increments (X1, Y1) from the starting coordinates (Xo, Yo) of the string, the starting coordinates (X, Y) of the divided string can be obtained, and the starting coordinates (X, Y) of the divided string By delimiting the character string divided by), it is possible to prevent the print quality of the characters marked at the boundary between the block overlap region of the Nth block and the block unique region of the N + 1th block from being deteriorated. Therefore, it is possible to solve the problem that the user does not identify the string marked on the steel sheet.

In the above description of the character marking method according to an embodiment of the present invention, the spirit of the present invention is not limited to the embodiments presented herein, those skilled in the art to understand the spirit of the present invention within the scope of the same idea Other embodiments may be easily proposed by adding, changing, deleting, or adding components, but this will also fall within the spirit of the present invention.

1 illustrates an example in which a part of characters constituting a character string is degraded when using a mobile automatic marking device.

2 is a system configuration diagram of a mobile automatic marking apparatus for executing the character marking method according to an embodiment of the present invention.

3 is a detailed view of an ink head used in the mobile automatic marking system shown in FIG.

4 is a flowchart illustrating a character marking method according to an embodiment of the present invention.

5 is a conceptual diagram illustrating the concept of a block and a block overlap area;

FIG. 6 is a diagram of classifying character strings into groups based on the arrangement and direction of the character strings marked inside the block; FIG.

7 is a flowchart illustrating a sequence of classifying a character string into groups.

8 is a conceptual diagram illustrating a method of obtaining coordinates in which the first character of a string to be divided is marked.

Claims (6)

In the character marking method of moving the ink head to mark characters on an object, Setting a markable area as one block when the ink head is moved once in one direction; When the ink head continuously marks two neighboring blocks with each other, setting a block overlap region in which the two blocks overlap on a movement path of the ink head; Determining whether the string to be marked on the object is marked beyond one block to a block adjacent thereto; and Character marking method comprising the step of marking a character on the object according to the determined result. delete The method of claim 1, In the step of marking a character on the object, if it is determined that the string to be marked on the object is marked beyond one block to a block adjacent thereto, a part of the string is marked on one block and the other part is divided. Character marking method for marking a neighboring block. The method of claim 3, And calculating the coordinates of the first marked character among the divided strings that are divided in the string and marked in the neighboring block. The method of claim 1, And classifying the character strings into groups based on the arrangement and direction of the character strings marked on the object before determining whether the character strings to be marked on the object are marked beyond one block to the neighboring block. How to mark a character. The method of claim 5, The classifying the character string into groups may further include determining whether the block to be marked is the first block.

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