JP2007213287A - Air space analysis device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an air space analysis device, for analyzing occurrence of air space and detecting the highest position of a part having the air space of a work to be coated. <P>SOLUTION: The air space analysis device comprises an input means for inputting shape data corresponding to a work to be coated to be dipped to liquid coating material; and an arithmetic means for assigning, after element division for dividing image data of the work to be coated into a plurality of elements, attribute information of liquid or gas to each divided, detecting an air space and a boundary between the air space and the liquid coating material, correcting the boundary so as to be close to the horizontal line by comparing heights of elements with attribute information of liquid or gas assigned thereto which are in contact with the boundary, and detecting, for an air space with the boundary corrected so as to be close to the horizontal line, the highest position of the air space by comparing heights of an element with attribute information changed to gas-liquid and an element adjacent thereto with attribute information of gas. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to an air pool analysis device, and more particularly to an air pool analysis device capable of detecting the highest part of a detected air pool.

  Electrodeposition coating performed by immersing the body of an automobile in an electrodeposition bath filled with an electrodeposition solution can form a coating film substantially uniformly, and also coats the welded portion of the electrodeposited object There are advantages such as being able to. On the other hand, there is a drawback that air pockets called air pockets are formed on the convex portions such as the hood inner surface, roof inner surface and floor lower surface of the vehicle body, and a coating film cannot be formed on the portion where the air pockets are generated.

  In view of this, there has been proposed a method for determining whether or not an air pocket is generated when an object to be coated (work to be coated) is immersed in an electrodeposition tank (see, for example, Patent Document 1).

  In this method, first, each surface of the workpiece to be painted is divided into an arbitrary number of triangular polygons (triangular elements) based on the vertex coordinate data, and the workpiece to be painted is input to each triangular polygon (triangular element). It is determined whether or not the surface portion can become an air pool when simulated immersion is performed in the immersion tank in the tank angle posture.

Here, as one of the measures to prevent the occurrence of air pockets, a hole is provided in the part where the air pool of the work to be painted occurs, and the liquid paint is allowed to flow from the hole to the part where the air pool will occur, There is a means to prevent the occurrence of air pockets. That is, in order to prevent the occurrence of air accumulation, a hole may be provided at the highest position of the part where the air accumulation has occurred in the workpiece.
JP 2000-51750 A

  However, even though it is possible to detect air puddles depending on the conventional method, a means for providing a hole in the workpiece to be coated, which is one of the measures for preventing the occurrence of air puddles to prevent the occurrence of air puddles. The position where the hole is provided cannot be detected.

  SUMMARY OF THE INVENTION An object of the present invention is to provide an air reservoir analyzing apparatus that can analyze the presence or absence of the occurrence of air pockets and can detect the highest position among the portions of the workpiece to be air trapped.

  In order to solve the above-described problem, an air pool analyzing apparatus according to claim 1 is provided with an input unit for inputting shape data corresponding to a workpiece to be coated by immersion coating with a liquid paint, and an image of the workpiece to be coated. After dividing the data into a plurality of elements, liquid or gas attribute information is given to each of the divided elements, and air pools are detected using these elements, and the detected air pools and liquids are detected. The boundary line of the paint is detected, and the boundary line is corrected so as to approach the horizontal line by comparing the height of the element to which the attribute information of the liquid or gas in contact with the boundary line is given, For an air pocket that has been modified to bring the boundary line closer to a horizontal line, the attribute information of the element whose attribute information touches the boundary line is changed to gas-liquid, and the attribute information is changed to gas-liquid. And the attribute information adjacent to this is compared with the height of the element which is gas, and the attribute information of the element where the attribute information is gas is used as gas liquid to detect the highest part of the air reservoir And means.

  According to a second aspect of the present invention, in the air pocket analyzing apparatus according to the first aspect, the calculation means determines the attribute information of an element adjacent to the free edge of the workpiece to be coated as liquid, and other than that The attribute information of the element is set as gas, the attribute information adjacent to the element whose attribute information is determined as liquid is compared with the height in the direction opposite to the gravity direction of the element set as gas, and the adjacent attribute If the height of the element whose information is set to gas is higher than the height of the element whose attribute information is determined to be liquid, the attribute information of the adjacent element is determined to be gas, and the element whose attribute information is determined to be liquid If the attribute information is lower or the same, the attribute information of the adjacent element is determined as liquid, and the attribute information is liquid until all the attribute information of the elements adjacent to the element determined to be liquid is determined. And decided Element and the attribute information, characterized in that the detection of air entrapment by comparing the height of the elements was determined with the gas.

  According to a third aspect of the present invention, in the air pool analyzing apparatus according to the first or second aspect, the calculation means detects a boundary line between the detected air pool and the liquid paint, and is in contact with the boundary line. The element located at the highest position among the elements whose attribute information is liquid and the element located at the lowest position among the elements whose attribute information in contact with the boundary line is gas are detected, and the detected attribute information is the liquid The element having the determined attribute information is compared with the height of the element whose detected attribute information is gas, and the element whose detected attribute information is determined to be gas from the height of the element whose detected attribute information is determined to be liquid If the detected attribute information is low or the same, the attribute information of the element whose detected attribute information is determined to be gas is changed to liquid, and the attribute information in contact with the detected boundary line is the lowest among the elements whose elements are gas. When the height of the element whose detected attribute information is determined to be gas is higher than the height of the element whose detected attribute information is determined to be liquid, the detection of the element located at the position is repeated. The correction is performed such that the line is fixed and the detected boundary is brought close to a horizontal line.

  According to a fourth aspect of the present invention, in the air pool analyzing device according to any one of the first to third aspects, the calculation means includes a boundary line between the plurality of air pools and the liquid paint from the workpiece. When one of the boundary lines is corrected, the other boundary line is corrected and then the detected air reservoir and the boundary line of the liquid paint are corrected so as to be close to the horizontal line. It is characterized by.

  According to a fifth aspect of the present invention, in the air pocket analyzing apparatus according to the fourth aspect, the computing means includes the element located at the highest position among the elements whose attribute information in contact with the boundary line is liquid and the boundary. The element located at the lowest position among the elements whose attribute information in contact with the line is gas is detected, and the boundary between the air reservoir and the liquid paint is detected each time the height is compared once. The correction is performed such that the boundary line between the detected air reservoir and the liquid paint approaches a horizontal line.

  According to a sixth aspect of the present invention, in the air pool analysis device according to any one of the first to fifth aspects, the calculation means is an air pool that has been corrected so that the boundary line approaches a horizontal line. And whether all the elements whose attribute information is determined to be gas are adjacent to the boundary of the liquid paint detected as air reservoirs, and all the elements whose attribute information is determined to be gas are said air If it is determined that the boundary between the reservoir and the liquid paint is adjacent, the position of the highest part of the air reservoir is specified, and all the elements whose attribute information is determined to be gas are the boundary between the air reservoir and the liquid paint. If it is determined that the element is not adjacent to the line, the attribute information of the element located on the boundary line between the detected air reservoir and the liquid paint is changed to gas-liquid, and the attribute information is changed to gas-liquid. Comparison of If it is determined that the height of the element whose attribute information is gas-liquid is lower than the height of the element whose attribute information is determined to be gas, the attribute information of the element whose attribute information is determined to be gas-liquid After the change to the element, the attribute information which is in contact with the boundary between the air reservoir and the liquid paint and has not been compared yet is determined to be gas-liquid, and the attribute information adjacent to the element is set to gas Is extracted, and it is determined that the attribute information is lower than the element in which the attribute information is gas, by repeatedly determining whether the height of the element in which the attribute information is gas is lower than the element in which the attribute information is gas-liquid When it is determined that there is no longer an element whose attribute information is determined to be gas-liquid, the position of the highest part of the air reservoir is specified.

  According to a seventh aspect of the present invention, in the air pocket analyzing apparatus according to the sixth aspect, the computing means compares the height of an element whose attribute information is gas-liquid and an element whose attribute information is gas. If the attribute information of an element whose attribute information is changed to gas after the change is changed to gas-liquid, detection of the boundary line between the element whose attribute information is changed to gas-liquid and the element whose attribute information is changed to gas is detected again. It is characterized by performing.

  The air pool analyzing apparatus according to claim 8 includes an input means for inputting shape data corresponding to a workpiece to be coated by immersion coating with a liquid paint, and a plurality of nodes on the surface of the image data of the workpiece to be coated. And assigning liquid or gas attribute information to each of the nodes, detecting an air pocket using these nodes, detecting a boundary line between the detected air pool and the liquid paint, and determining the boundary line. A correction was made to bring the boundary line closer to a horizontal line by comparing the heights of nodes to which attribute information of liquid or gas in contact with the boundary line was given, and a correction was made to bring the boundary line closer to a horizontal line For the air reservoir, the attribute information of the node whose attribute information in contact with the boundary line is gas changed to gas-liquid, and the node whose attribute information was changed to gas-liquid and the attribute information adjacent thereto were gas Knot Characterized in that it comprises a calculating means for detecting the highest part of the air reservoir by comparing of.

  According to a ninth aspect of the present invention, in the air pocket analyzing apparatus according to the eighth aspect, the calculating means determines the attribute information of the node adjacent to the free edge of the workpiece to be coated as liquid, and other than that The attribute information of the node is set as gas, the attribute information adjacent to the node determined as the liquid is compared with the height in the direction opposite to the gravity direction of the node set as gas, and the adjacent attribute is compared. When the height of a node set with information as gas is higher than the height of a node determined as attribute information with liquid, the attribute information of the adjacent node is determined as gas, and the node with attribute information determined as liquid If the attribute information is lower or the same, the attribute information of the adjacent node is determined to be liquid, and the attribute information is liquid until all the attribute information of the nodes adjacent to the node determined to be liquid is determined. And decided Nodal and the attribute information, characterized in that the detection of air entrapment by comparing the height of the nodes determined to gas.

  According to a tenth aspect of the present invention, in the air pool analyzing device according to the eighth or ninth aspect, the calculation means detects a boundary line between the detected air pool and the liquid paint and is in contact with the boundary line. The node located at the highest position among the nodes whose attribute information is liquid and the node located at the lowest position among the nodes whose attribute information touching the boundary line is gas are detected. The determined node and the detected attribute information are compared to the height of the node whose gas is gas, and the detected attribute information is determined to be the node from which the detected attribute information is determined as gas from the height of the node determined as liquid In the case where the detected attribute information is low or the same, the attribute information of the node whose detected attribute information is determined to be gas is changed to liquid, and the attribute information in contact with the detected boundary line is the lowest among the nodes having gas Repeatedly detecting a node located at a position, and if the detected attribute information is higher than the node height determined to be liquid, the detected attribute information is higher than the node height determined to be liquid The boundary line is fixed and correction is performed so that the detected boundary line approaches a horizontal line.

  According to an eleventh aspect of the present invention, in the air pool analysis device according to the tenth aspect, when the calculation means detects a plurality of air pool and boundary lines of liquid paint from the workpiece, one boundary line is detected. After the correction is performed once, the other boundary line is corrected so that the detected air reservoir and the boundary line of the liquid paint are brought close to a horizontal line.

  According to a twelfth aspect of the present invention, in the air pool analyzing device according to any one of the eighth to eleventh aspects, the computing means is the most of the nodes whose attribute information in contact with the boundary line is liquid. Each time the node located at the highest position and the node located at the lowest position among the nodes whose attribute information in contact with the boundary line is gas are detected and the heights are compared once, the air reservoir and the liquid By detecting the boundary line of the paint, a correction is made to bring the detected air reservoir and the boundary line of the liquid paint closer to a horizontal line.

  According to a thirteenth aspect of the present invention, in the air pool analysis device according to any one of the eighth to twelfth aspects, the calculation means is an air pool that has been corrected so as to bring the boundary line closer to a horizontal line. Is determined whether all nodes whose attribute information is determined to be gas are adjacent to the boundary of the liquid paint detected as air reservoirs, and all nodes whose attribute information is determined to be gas are said air If it is determined that the boundary between the reservoir and the liquid paint is adjacent, the position of the highest part of the air reservoir is specified, and all the nodes whose attribute information is determined to be gas are all boundaries between the air reservoir and the liquid paint. If it is determined that it is not adjacent to the line, change the attribute information of the node located on the boundary between the air reservoir and the liquid paint to gas-liquid, and compare the height of the node where the attribute information is gas-liquid and the height Do the above If it is determined that the height of the node for which the sex information is gas-liquid is lower or the same as the height of the node for which the attribute information is determined to be gas, the attribute information of the node for which the attribute information is determined to be gas is After changing to liquid, the attribute information that is in contact with the boundary between the air reservoir and the liquid paint and has not yet been compared is determined to be gas-liquid, and the attribute information adjacent to the node is set to gas The node is extracted, and it is repeatedly determined whether the height of the node whose attribute information is gas is lower than the node whose attribute information is gas-liquid, and the attribute information is lower than or equal to the node whose gas is gas When it is determined that there is no node determined to be gas-liquid as the determined attribute information, the position of the highest part of the air reservoir is specified.

  According to a fourteenth aspect of the present invention, in the air pocket analyzing apparatus according to the thirteenth aspect, the computing means compares the height of an element whose attribute information is gas-liquid and an element whose attribute information is gas. If the attribute information of an element whose attribute information is gas after being changed to gas-liquid after detection, the boundary line between the element whose attribute information is gas-liquid and the element whose attribute information is gas is detected again. It is characterized by performing.

  In order to solve the above-described problems, according to the invention described in claim 1 or claim 8, the occurrence of air puddles can be analyzed, and the highest position among the portions where the air puddles of the work to be coated has occurred. Can be detected. Then, by providing a hole at that position, the liquid paint can be caused to flow into a position where the air pool of the work to be coated is generated, and the portion where the air pool is generated can be filled with the liquid paint to prevent the occurrence of the air pool. .

  According to the invention described in claim 2 or claim 9, the attribute of the element adjacent to the free edge is determined as liquid, the attribute of the other element is set as gas, the attribute is set as liquid, and the attribute is determined as liquid. By comparing the heights of elements whose attributes are set as gas, it is possible to easily determine the presence or absence of air pockets.

  According to the third aspect of the present invention, even if the boundary between the detected air reservoir and the liquid paint is inclined to a considerable extent with respect to the horizontal line, the attribute at the highest position in contact with the boundary is defined as liquid. Compare the height of the element that is determined to be gas and the attribute that touches the boundary of the determined element and its boundary, and change the attribute of the element that is determined to be the lowest position to gas Thus, the boundary between the detected air reservoir and the liquid paint can be derived as an approximation of a horizontal line.

  According to the invention described in claim 3, the boundary between the air reservoir and the liquid paint is approximated to a horizontal line regardless of the feature point of the element used when comparing the height of the element. Can be corrected.

  According to the invention described in claim 4 or claim 11, when a plurality of air reservoirs and liquid paint boundary lines are detected, each of the boundary lines is changed each time correction is performed. By performing the correction, each boundary line can be corrected efficiently.

  According to the invention described in claim 5 or claim 12, by detecting the boundary line and correcting the boundary line every time one boundary line is corrected, the first detected line Even if the boundary line of this is divided by the convex part formed in the work to be coated while repeating the analysis, the occurrence of air puddle can be detected even in the part where the air puddle will naturally occur The boundary between the air pocket and the liquid paint can also be derived as an approximation of the horizontal line.

  According to the sixth aspect of the present invention, it is determined whether all elements whose attribute information is determined to be in contact with the boundary between the detected air reservoir and the liquid paint are in contact with each other, and the attribute information is determined to be gas. When it is determined that all the elements are in contact with each other, the highest part of the air pocket can be detected immediately.

  According to the invention described in claim 6, when it is determined that not all elements whose attribute information is determined to be gas are in contact with the boundary line, the attribute information in contact with the boundary line is gas-liquid. By comparing the height of an element whose attribute information is determined to be gas, the highest part of the air reservoir can be detected.

  According to invention of Claim 7 or Claim 14, even if it is a case where a some recessed part exists in the detected air pocket, detection of the highest site | part can be performed about all those recessed parts.

  According to the tenth aspect of the present invention, even if the detected air reservoir and the boundary line of the liquid paint are inclined to a considerable extent with respect to the horizontal line, the attribute at the highest position adjacent to the boundary line is set. Compares the height of the node determined to be gas and the node that is determined to be liquid and the attribute of the node determined to be liquid to change the attribute of the node determined to be gas to the liquid. Thus, the detected boundary between the air pocket and the liquid paint can be derived as an approximation of a horizontal line.

  According to the invention of claim 13, it is determined whether or not all nodes whose attribute information is determined to be in contact with the boundary between the detected air reservoir and the liquid paint are in contact with each other, and the attribute information is determined to be gas. When it is determined that all the nodes are in contact with each other, the highest part of the air pocket can be detected immediately.

  According to the invention described in claim 13, when it is determined that not all nodes whose attribute information is determined to be gas are in contact with the boundary line, the attribute information in contact with the boundary line is gas-liquid. By comparing the height of a node whose attribute information is determined to be gas, the highest part of the air pocket can be detected.

  Hereinafter, the present embodiment will be described with reference to the drawings. The invention according to the present embodiment is not limited to the illustrated example. FIG. 1 is a block diagram showing an embodiment of an air pool analysis device 1 for performing immersion coating analysis on the workpiece.

  As shown in FIG. 1, an air pocket analyzing apparatus 1 according to the present embodiment includes a CPU 2, a control unit 5 as a calculation means including a ROM 3 and a RAM 4 as storage areas, a keyboard 6, and a keyboard controller 9 that controls the keyboard 6. A display 10 as a display unit, a display controller 11 for controlling the display 10, a hard disk drive (HDD) 12, a flexible disk drive (FDD) 13, a disk controller 14 for controlling the HDD 12 and the FDD 13, and a network 15 And a network interface controller 16 for connection to each other via a system bus 19 so as to be communicable with each other.

  The CPU 2 comprehensively controls each component connected to the system bus 19 by executing software stored in the ROM 3 or the hard disk drive 12 or software supplied from the flexible disk drive 13. That is, the CPU 2 reads out the processing program from the ROM 3, the hard disk drive 12, or the flexible disk drive 13 according to a predetermined processing sequence and executes it, thereby performing the operation of the method for predicting the occurrence of air stagnation in the object to be coated according to this embodiment. Control to achieve it.

  The control unit 5 analyzes the occurrence of air pockets according to the input signal from the keyboard 6.

  The control unit 5 reads out data of a workpiece to be analyzed from the hard disk drive 12 and divides the workpiece into a plurality of elements to construct a numerical calculation model for numerical calculation. That is, the control unit 5 sets an analysis target region set in accordance with an instruction signal from the keyboard 6, and divides the workpiece α to be coated into a plurality of elements, for example. In addition, as long as the shape of the element is three or more, any shape such as a triangular shape or a quadrangular shape may be used.

  The RAM 4 functions as a main memory or work area for the CPU 2. The keyboard controller 9 controls an instruction input from the keyboard 6 or a pointing device (not shown). The display controller 11 controls display on the display 10. The disk controller 14 controls access to the hard disk drive 12 and the flexible disk drive 13 that store a boot program, various applications, editing files, user files, a network management program, a predetermined processing program in the present embodiment, and the like. The network interface controller 16 transmits and receives data to and from a device or system on the network 15 in both directions.

  The control unit 5 analyzes the occurrence of air pockets according to the input signal from the keyboard 6.

  When analyzing the occurrence of air accumulation, the control unit 5 reads out data of a work to be painted, which is an analysis target, from the hard disk drive 12, and divides the work to be painted into a plurality of elements for numerical calculation. It is designed to build a calculation model. That is, the control unit 5 sets an analysis target region set in accordance with an instruction signal from the keyboard 6, and for example, divides the workpiece α into a plurality of elements as shown in FIG. .

  Further, when analyzing the workpiece, the control unit 5 sets the workpiece as an analysis target range.

  Next, an analysis is made as to whether or not an air pool occurs in the workpiece α to be coated.

  Specifically, first, an element adjacent to the free edge of the workpiece α to be coated divided into numerical calculation models is set as an initial boundary element.

The free edge means an edge portion of the workpiece α, that is, an end portion of the workpiece α and an edge portion of a hole formed in the workpiece α. The initial boundary element is an element adjacent to the free edge of the work α to be coated, and an element whose attribute information is determined to be liquid (paint). In addition, the fact that elements are adjacent means sharing a node. An element adjacent to a free edge means that a side constituting the element is in contact with the free edge.
In addition, as an element that initially determines the attribute as liquid (paint), it can be an element that can be recognized when the workpiece α to be coated is viewed from above and in the vertical direction with respect to the liquid surface. In the following embodiment, the case where the attribute of the element adjacent to the free edge is used as the initial boundary element has been described, but the processing after the determination of the initial boundary element is the same in the above case.

  Next, attribute information of elements other than those determined to be liquid is set to gas (air).

  Then, the attribute information adjacent to the initial boundary element is compared with the height of the element set as gas. If the height of the element set as attribute information is higher than the height of the element whose attribute information is determined as liquid, the attribute information of the element set as gas is determined as gas. On the other hand, if the height of the element whose attribute information is set to gas is lower than or the same as the height of the element whose attribute information is determined to be liquid, the attribute information of the adjacent element is determined to be liquid.

  Next, when there is a gas element whose attribute information is adjacent to an element whose attribute information has been changed from gas to liquid, the height of the element whose attribute information is determined to be liquid and whose attribute information is set to gas If the height of the element whose attribute information is set to gas is higher than the height of the element whose attribute information is determined to be liquid, the attribute information of the element whose attribute information is set to gas is determined to be gas. .

  On the other hand, if the height of the element whose attribute information is set to gas is lower than or the same as the height of the element whose attribute information is determined to be liquid, the attribute information of the adjacent element is determined to be liquid. The determination is made because the specific gravity of the liquid is larger than the specific gravity of the gas.

  In comparing the heights of the elements in the Z direction, the heights of the feature points of the elements are compared. The feature points of the elements used here are not particularly limited, and for example, any of the center of gravity point, the highest vertex among the vertices of each element, the inner center point, the outer center point, or the perpendicular point may be used.

  Here, a method for comparing the initial boundary element and the element whose attribute information is not determined will be specifically described. When the element C shown in FIGS. 3A and 3B is the initial boundary element and the element A sharing the node α is an element whose attribute information has not been determined, the height of the centroid of the initial boundary element C in the Z direction The height in the Z direction of the center of gravity of element A for which attribute information has not been determined is compared, and the height of the center of gravity of element A for which attribute information has not been determined is lower than the height of the center of gravity of initial boundary element C In this case, the attribute information of the element A whose attribute information has not been determined is determined as liquid.

  On the other hand, when the height of the center of gravity of the element A for which attribute information is not determined is the same as or higher than the height of the center of gravity of the initial boundary element C, the attribute information of the element A is gas Is determined.

  In addition, when there are a plurality of nodes whose attribute information is adjacent to the node set as the attribute information and are determined as liquid, the node is compared with all the nodes. If there is a node whose attribute information is determined to be higher than or equal to the node whose attribute information is gas among those nodes, the attribute information is gas The node attribute information is changed to liquid, and the attribute information is determined to be liquid.

  Then, until the attribute information of all elements adjacent to the element whose attribute information is determined to be liquid is determined, the control unit 5 sets the attribute information determined to be liquid and the attribute information adjacent thereto as gas. Compare the height of the set element. Then, when it is determined that the attribute information of all elements adjacent to the element whose attribute information is determined to be liquid has been determined, the control unit 5 ends the analysis of the presence or absence of the occurrence of air pockets.

  FIG. 4A shows the result of analysis by comparing the height of the center of gravity of the element. FIG. 4B shows the result of analysis by comparing the height of the highest vertex among the vertices of each element. FIG. 4C shows the result of analysis by comparing the heights of the inner center points of the elements. FIG. 4D shows the result of analysis performed by comparing the heights of the outer center points of the elements. FIG. 4E shows the result of analysis by comparing the heights of the centroids of the elements. FIG. 4 (f) shows the result of analysis performed by comparing the heights of the nodes of the element, and connects the intermediate points of the nodes whose attribute information is gas and whose attribute information is liquid. This is the boundary between the air reservoir and the liquid paint. 4A to 4F, a non-shaded area indicates a liquid paint, and a shaded area indicates an air reservoir. The same applies to FIGS. 5 and 6.

When the kaiseki is performed using the center of gravity, the highest node among the nodes of each element, the inner center point, the outer center point, or the node, FIG. 4 (a) to FIG. 4 (d) and FIG. 4 (f). As shown, right-down boundary lines L _{a to} L _d and L _f are derived from the element N in a straight line. Also, if analyzed using orthocenter point elements, as shown in FIG. 4 (e), the boundary line L _e downward-sloping in which a plurality of stepped portions is formed is derived.

  The control unit 5 corrects the boundary between the air pocket and the liquid paint derived by the above-described method. There is no particular limitation on the method of correcting the boundary line.

  As a technique for correcting the boundary line, for example, first, the boundary between the analyzed air pool and liquid paint generated in the work α to be coated, that is, the element whose attribute information is determined to be liquid and the attribute information is determined to be gas. The boundary line of the specified element is detected.

  Next, after extracting the element having the highest height in the Z direction from the elements determined to be liquid as the attribute information in contact with the detected boundary to be corrected, the attribute information in contact with the boundary is determined to be gas. Among the elements, the element having the lowest height in the Z direction is extracted. Then, the height in the Z direction of the element whose attribute information is determined to be liquid is compared with the height in the Z direction of the element whose attribute information is determined to be gas.

  As a result of comparison, if it is determined that the height of the element whose attribute information is determined to be liquid is higher than the height of the element whose attribute information is set to gas, the attribute information that was the comparison target is determined to be gas. The element attribute information is changed to liquid. And every time it corrects once, the operation | work which detects a boundary line is performed.

  This correction is repeatedly performed on the detected boundary line until the attribute information in which the attribute information whose height in the Z direction in contact with the boundary line is the highest is lower than that of the liquid element does not have the gas element. When the control unit 5 determines that there are no more elements to be corrected for elements that are in contact with one boundary line, that is, when it is determined that there is no ZAmax higher than ZLmax, the determination is made for the one boundary line. To do. The determined boundary line is not subject to correction thereafter.

  Next, when a plurality of boundary lines are detected, for example, each boundary line is corrected once. In this method, when a plurality of boundary lines are detected, first, the order of correcting each detected boundary line is determined. As a method for determining the order of correction, for example, correction is performed in order of increasing boundary length.

  Next, for the boundary line to be corrected first, as in the case where only one boundary line is detected, the attribute information in contact with the correction target boundary line is the height of the Z direction among the elements determined to be liquid. After extracting the highest element, the element having the lowest height in the Z direction is extracted from elements determined to be gas as attribute information in contact with the boundary line. Then, the height in the Z direction of the element whose attribute information is determined to be liquid is compared with the height in the Z direction of the element whose attribute information is determined to be gas.

  As a result of the comparison, when it is determined that the height of the element whose attribute information is determined to be liquid is higher than or the same as the height of the element whose attribute information is set to gas, the attribute information which is the comparison target is determined to be gas. The attribute information of the determined element is changed to liquid.

  Then, when the element in contact with one boundary line is corrected once, the element in contact with another boundary line is corrected. Then, after correcting once for all the elements that touch the boundary line, detect the boundary line again, and correct the elements that touch the boundary line detected by the same method as the previous one. I do.

  Then, when it is determined that there is no element to be corrected that is in contact with one boundary line, that is, when it is determined that there is no ZAmax higher than ZLmax, the determination process is performed for the one boundary line. ing. Even if the boundary line that has been confirmed is detected thereafter, it is not subject to correction. The process is repeated until all the detected boundary lines have been finalized.

  When the boundary line is corrected by such a method, the boundary line derived when the previous air pocket is detected is corrected so as to extend in the horizontal direction. For example, the boundary line La is as shown in FIG. 5A, the boundary line Lb is as shown in FIG. 5B, the boundary line Lc is as shown in FIG. 5C, and the boundary line Ld is as shown in FIG. As shown in FIG. 5D, the boundary line Le is corrected so as to extend in the horizontal direction, as shown in FIG. 5E, and the boundary line Lf is corrected as shown in FIG.

  Further, the control unit 5 detects the boundary line again after correcting once for all the detected boundary lines. For this reason, for example, as shown in FIG. 6 (a), an air pocket and a liquid paint that will actually occur even in a workpiece β in which a recess X and a recess Y lower than the recess X are continuously formed are formed. A boundary line approximated to the boundary line can be derived.

That is, when the workpiece β is divided into a plurality of elements by the above-described method and the heights of the elements are compared to analyze the presence or absence of an air pocket, as shown in FIG. edge of the boundary line L _V is derived. Then, when performing correct this boundary L _V each performing one correction process without task of detecting the boundary line continuously, it compares the elements in the vicinity of the recess Y subject always elements X ₁ It is. As a result, as shown in FIG. 6C, the boundary line L _V1 is generated in the vicinity of the convex portion X, but an analysis result is obtained that no air pocket is generated in the vicinity of the concave portion Y.

However, the boundary lines of the actual results at will if the air reservoir and the liquid coating material to be coated workpiece β is L _X and L _Y shown in FIG. 6 (d).

Therefore, if the boundary line is detected every time the comparison correction process is performed once, separate boundary lines appear below the concave portion X and below the concave portion Y. Then, the attribute information contact boundary occurs under the concave portion Y is high element placed most Z direction component of the liquid becomes Y _1. As a result, as shown in FIG. 6E, boundary lines L _X1 and L _X2 approximate to the boundary lines L _X and L _Y that would actually occur are derived below the recess X and the recess Y.

  Moreover, the control part 5 detects the highest site | part which is the highest position of the height of the Z direction in the site | part in which the air pocket was formed in the workpiece. Here, the highest part of the air pool is the highest in the Z direction of the element having the attribute information in contact with the boundary between the air pool and the liquid paint in the range where the air pool is generated. Position at the highest position in the Z direction of the element located at the highest position in the Z direction among the elements that are the gas and liquid attribute information to be described later that touches the boundary between the air reservoir and the liquid paint Or a range surrounded by a boundary line of an element whose attribute information is determined to be gas liquid and an attribute information whose attribute information is determined to be gas.

  As a technique for detecting the highest part, for example, first, detection of an air reservoir and detection of a boundary line between the air reservoir and the liquid paint that have been corrected earlier are performed. Then, it is determined whether all the elements whose attribute information is determined to be gas are adjacent to the boundary line of the liquid paint that is detected as an air reservoir. If it is determined that all elements whose attribute information is determined to be gas are adjacent to the boundary between the air reservoir and the liquid paint, the highest portion of the air reservoir has already been detected. After the position is specified, the analysis of the air pocket is finished.

  If it is determined that all elements whose attribute information is determined to be gas are not adjacent to the boundary between the air reservoir and the liquid paint, the attribute information of the element located on the boundary between the air reservoir and the liquid paint is changed to gas-liquid. To do.

  And if the attribute information is compared with the height of the element that has been gas-liquid, and the height of the element whose attribute information has been determined to be gas-liquid is determined to be lower than the height of the element whose attribute information has been determined to be gas Changes the attribute information of the element determined to be gas to gas-liquid.

  Further, the element that is in contact with the detected air reservoir and the boundary line of the liquid paint and has not been compared yet is determined to be gas-liquid, and the attribute information adjacent to that element is set to gas. A determination is made as to whether the height of the element whose attribute information is extracted as gas-liquid is lower than the element whose attribute information is determined as gas.

  This process is repeated until there is no element whose attribute information is determined to be lower than the element whose attribute information is gas. And when the control part 5 judges that the attribute information judged that attribute information is lower than the element made into gas is no longer the element determined to be gas-liquid, the position of the highest part of the air pocket which is an analysis object After the identification is completed, the analysis is terminated.

  The apex located at the highest position in the Z direction of the element that has been determined that the attribute information that is in contact with the air reservoir is the gas, or the attribute information that will be described later that is in contact with the air reservoir is the gas liquid. Among the elements, when the vertex is located at the highest position in the Z direction of the element located at the highest position in the Z direction, the highest part of the air pocket is determined by the X coordinate, Y coordinate, and Z coordinate of those vertices. Identify the location.

  Further, when the highest part of the air pool is in a range surrounded by the boundary line between the element whose attribute information is determined to be gas-liquid and the element whose attribute information is determined to be gas, it is in contact with the boundary line, for example. The highest part of the air pocket is specified using the X coordinate, Y coordinate, and Z coordinate of the node included in the element.

  In addition, the control unit 5 compares the height of the element whose attribute information is gas and liquid and the height of the element whose attribute information is gas, and as a result, the attribute information of the element whose attribute information is gas is the gas liquid. In the case of changing to, the boundary line between the element whose attribute information is gas-liquid and the element whose attribute information is gas is detected again. This is because it is possible to detect all the highest parts even in a workpiece to be coated in which there may be a plurality of sites that are judged to be the highest site, such as the workpiece α to be coated as shown in FIG. is there.

  As shown in FIG. 7, there are portions where a plurality of air pools such as the recesses X, the recesses Y, and the recesses Z are generated in the range A determined as the air pool shown by being shaded of the work α to be coated. Even if it is included, the highest site can be detected at each site.

  That is, when the boundary line between the range A in which it is determined that air accumulation has occurred and the range B in which it has been determined that the liquid paint has been applied is derived, the recess X, the recess Y, and the recess Z are included in the range A. It is not recognized that it is included.

  In the process of comparing the element whose attribute information is gas-liquid and the element whose attribute information is gas, when the process of detecting the boundary line is not performed every time correction is performed, the range A Only one of the highest portions of the concave portion X, the concave portion Y and the concave portion Z can be detected.

  This is because, if the comparison of the element whose attribute information is gas-liquid and the element whose attribute information is gas is continuously performed, the recess X, for the same reason as the case where the boundary line is corrected first, This is because only one of the concave portion Y and the concave portion Z results in detecting only the highest portion.

  In contrast, the height of the element whose attribute information is gas and liquid is compared with the height of the element whose attribute information is gas, and as a result, the attribute information of the element whose attribute information is gas is changed to gas-liquid. After that, if the boundary line between the element whose attribute information is gas-liquid and the element whose attribute information is gas is to be detected, it was originally only one boundary line of the range A and the range B However, even below the concave portion X, the concave portion Y, and the concave portion Z, the boundary line between the element whose attribute information is gas liquid and the element whose attribute information is gas is formed separately. Therefore, as shown in FIG. 8, in each of the recess X, the recess Y, and the recess Z, it is possible to detect the highest sites x1, y1, and z1.

  Further, when detecting the highest part of the air reservoir, the control unit 5 determines the order of detecting the highest part of the air reservoir when a plurality of boundary lines between the air reservoirs and the liquid paint are detected. ing. There is no restriction on the method of determining the order, but for example, the highest part is detected in order of the air reservoir that forms the boundary between the long air reservoir and the liquid paint, or the boundary between the short air reservoir and the liquid paint is formed. The highest part of the air reservoir is detected in the order of the air reservoir.

  Data used in the present embodiment is input from the keyboard 6. As the workpiece α to be coated, for example, in a vehicle such as an automobile, there are various parts of a vehicle body that requires electrodeposition coating, such as a door panel, an engine hood panel, and a white body. The shape data of these workpieces α to be coated is created directly by the designer himself or automatically based on CAD data, STL (Stereo Lithography) data, etc. created in advance. A mouse or a scanner may be used for inputting necessary data. Further, necessary data may be read from a storage device (not shown) provided in another computer connected to the external connection terminal via a communication means such as a LAN (not shown).

  The display 10 displays an analysis process for the workpiece α to be coated.

  The hard disk drive 12 stores data of a workpiece to be analyzed.

The hard disk drive 12 is not limited to the one stored in the DOM, and a writable nonvolatile recording medium such as a hard disk device, a magneto-optical disk device, or a flash memory provided outside the air reservoir analysis device 1 is used as the hard disk drive. 12 may be used.
(When analysis is performed using nodes)

  Further, the analysis of whether or not air accumulation occurs in the workpiece may be performed by comparing the heights of a plurality of nodes arranged on the surface of the workpiece. In this case, the control unit 5 first arranges a plurality of nodes on the surface of the workpiece to be coated, and analyzes the occurrence of air pockets using these nodes.

  There is no particular limitation on the method of arranging the nodes on the surface of the workpiece to be coated, and the nodes can be arranged by any method. As a method for arranging the nodes on the surface of the workpiece to be coated, for example, there is a method of dividing the surface of the workpiece to be coated into elements and then using the vertices of the elements formed on the surface of the workpiece to be coated as nodes. Here, the shape of the element to be divided is not particularly limited, and may be a triangle or a quadrangle.

  In analyzing the occurrence of air accumulation using the nodes, the control unit 5 uses the nodes determined as liquid (paint) as the attribute information adjacent to the free edge of the work to be coated as the initial boundary nodes, and other nodes. The attribute information is set to gas.

  Moreover, the control part 5 performs the connection of the nodes arrange | positioned on the surface of a to-be-coated work, ie, the setting of the adjacent relationship of nodes. The adjacency relationship refers to a relationship that is to be compared in determining node attribute information, and does not compare nodes that are not adjacent. There is no particular limitation on which nodes are adjacent to each other. As a method of setting the adjacency relationship, for example, the nodes are arranged by using the method of dividing the surface of the workpiece to be painted into elements as described above and using the vertexes of the elements formed on the surface of the workpiece to be painted as nodes. In this case, among the arranged nodes, the nodes connected by the sides constituting the element are set as adjacent to each other.

  Then, the height of the set node is compared with the attribute information adjacent to the initial boundary node. If the height of the node set as attribute information is higher than the height of the node determined as attribute liquid, the attribute information of the node set as gas is determined as gas. On the other hand, when the height of the node whose attribute information is set to gas is lower than the height of the node whose attribute information is determined to be liquid, the attribute information of the adjacent node is determined to be liquid. Note that when comparing the heights of nodes in the Z direction, Z coordinate values of the Z coordinates of the nodes are used.

  Next, if the attribute information adjacent to the node whose attribute information has been changed from gas to liquid is a gas node, the attribute information is determined to be liquid and the attribute information is set to gas. When comparison is made and the height of the node set as attribute information is higher than the height of the node set as attribute information liquid, the attribute information of the node set as gas attribute information is determined as gas .

  On the other hand, when the height of the node whose attribute information is set to gas is lower than the height of the node whose attribute information is determined to be liquid, or the same, the attribute information of adjacent nodes is determined to be liquid. The determination is made because the specific gravity of the liquid is larger than the specific gravity of the gas.

  On the other hand, if the height of a node whose attribute information is set to gas is higher than the height of a node whose attribute information is determined to be liquid, the node whose attribute information is set to gas determines that attribute information is gas. . The determination is made because the specific gravity of the liquid is larger than the specific gravity of air.

  In addition, the control unit 5 compares the nodes whose attribute information is determined to be liquid and the nodes whose attribute information is set to gas, and compares the attributes of all the nodes adjacent to the nodes whose attribute information is determined to be liquid. It is repeated until the information is determined.

  When it is determined that all the attribute information of the nodes adjacent to the node whose attribute information is determined to be liquid is determined, the control unit 5 has an attribute that is adjacent to the node whose attribute information is determined to be gas. Among the nodes determined to be liquid, the adjacent elements are connected to each other, and the range surrounded by the connection is recognized as the range where the air pocket has occurred.

  The boundary between the air reservoir and the liquid paint is determined by connecting the intermediate points provided between the nodes whose attribute information is determined to be liquid and whose attribute information is adjacent to the node whose attribute information is determined to be gas.

Specifically, as shown in FIG. 4F, there is a boundary between a node a indicated by a white circle whose attribute information is determined as gas and a node b indicated by a black circle whose attribute information is adjacent to the liquid as attribute information. A point J is provided and connected, and a line represented by a bold line is recognized as a boundary line L _f between the air reservoir and the liquid paint. Note that the shaded area in FIG. 4 is an area that is determined to be an air reservoir.

  The position where the boundary point J is arranged is not particularly limited. For example, the distance from the node b where the attribute information is determined to be liquid to the boundary point J and the node a where the attribute information is determined as gas from the boundary point J The boundary point J is arranged so that the ratio of the distance to the distance is 5: 5 or 6: 4.

  The control unit 5 corrects the boundary between the air reservoir and the liquid paint derived by comparing the heights of the nodes. There is no particular limitation on the method of correcting the boundary line. As a technique for correcting the boundary line, for example, first, the boundary line between the analyzed air reservoir and the liquid paint generated in the workpiece α to be coated is detected.

  Next, after extracting the node having the highest height in the Z direction from the nodes determined to be liquid as the attribute information adjacent to the detected boundary line to be corrected, the attribute information in contact with the boundary line is determined to be gas. Among the nodes, the node having the lowest height in the Z direction is extracted. Then, the height in the Z direction of the node determined as the attribute information is compared with the height in the Z direction of the node determined as the gas in the attribute information.

  As a result of the comparison, when it is determined that the height of the node whose attribute information is determined to be liquid is higher than or the same as the height of the node whose attribute information is set to gas, the attribute information which is the comparison target is determined to be gas. The attribute information of the determined node is changed to liquid. And every time it corrects once, the operation | work which detects a boundary line is performed.

  This correction is repeatedly performed on the detected boundary line until the attribute information in which the attribute information whose height in the Z direction adjacent to the boundary line is the highest is lower than the node of the liquid has no gas node. When the control unit 5 determines that there is no node to be corrected with respect to the node that is in contact with one boundary line, the controller 5 determines the one boundary line. The determined boundary line is not subject to correction thereafter.

  Next, when a plurality of boundary lines are detected, for example, when a plurality of boundary lines are detected, each boundary line is corrected once. In this method, when a plurality of boundary lines are detected, first, the order of correcting each detected boundary line is determined. As a method for determining the order of correction, for example, correction is performed in order of increasing boundary length.

  Next, for the boundary line to be corrected first, as in the case where only one boundary line is detected, the attribute information in contact with the correction target boundary line is the height of the Z direction among the elements determined to be liquid. After extracting the highest element, the element having the lowest height in the Z direction is extracted from elements determined to be gas as attribute information in contact with the boundary line. Then, the height in the Z direction of the element whose attribute information is determined to be liquid is compared with the height in the Z direction of the element whose attribute information is determined to be gas.

  As a result of the comparison, when it is determined that the height of the node whose attribute information is determined to be liquid is higher than or the same as the height of the node whose attribute information is set to gas, the attribute information which is the comparison target is determined to be gas. The attribute information of the determined node is changed to liquid.

  When a node that is in contact with one boundary line is corrected once, a node that is in contact with another boundary line is corrected. Then, after correcting the nodes that touch all the boundary lines once, detect the boundary lines again, and correct the nodes that touch the boundary lines detected by the same method as before. I do.

  When it is determined that there is no node to be corrected that is in contact with one boundary line, that is, when it is determined that there is no ZAmax higher than ZLmax, a determination process is performed for the one boundary line. Yes. Even if the boundary line that has been confirmed is detected thereafter, it is not subject to correction. The process is repeated until all the detected boundary lines have been finalized.

  When the boundary line is corrected by such a method, the boundary line derived when the previous air pocket is detected is corrected so as to extend in the horizontal direction.

  In addition, the control unit 5 compares the heights of the elements and detects the boundary line, and then performs a single correction on all the boundary lines detected using the heights of the nodes. As described above, the boundary line is detected again.

  Moreover, the control part 5 detects the highest site | part which is the highest position of the height of the Z direction in the site | part in which the air pocket was formed in the workpiece. Here, the highest part of the air pool is the node located at the highest position among the nodes whose attribute information in contact with the air pool is determined to be gas in the range where the air pool is generated, and the air pool. Of the nodes whose gas-liquid attribute information described later is in contact with the gas, the node located at the highest position in the Z direction, or the node where the air reservoir and attribute information are determined as gas and the node whose attribute information is determined as liquid A range surrounded by a border.

  As a method for detecting the highest part, for example, the control unit 5 first detects the boundary between the air reservoir and the liquid paint. Then, it is determined whether all nodes whose attribute information is determined to be gas are adjacent to the boundary line of the liquid paint detected as an air reservoir. If it is determined that all nodes whose attribute information is determined to be gas are adjacent to the boundary between the air reservoir and the liquid paint, the highest location of the air reservoir has already been detected. After the position is specified, the analysis of the air pocket is finished.

  If it is determined that all nodes whose attribute information is determined to be gas are not adjacent to the boundary between the air reservoir and the liquid paint, the attribute information of the node located on the boundary between the air reservoir and the liquid paint is changed to gas-liquid. To do.

  Then, the height of the node whose attribute information is changed to gas-liquid and the node whose attribute information adjacent to the node whose attribute information is changed to gas-liquid are determined to be gas are compared. That is, it is determined whether the height of the node having the attribute information as gas-liquid is lower than the node having the attribute information determined as gas.

  If it is determined that the height of the node whose attribute information is gas-liquid is lower than the height of the node whose attribute information is determined to be gas, the attribute information of the node whose attribute information was compared is determined to be gas Change to gas-liquid.

  If it is determined that the height of the node whose attribute information is gas-liquid is not lower than the height of the node whose attribute information is determined to be gas, it is still in contact with the boundary between the detected air reservoir and the liquid paint. The node whose attribute information is not targeted is extracted as gas-liquid, and the attribute information adjacent to that node is extracted as gas, and the height of the node whose attribute information is gas-liquid is attribute information. Judge whether it is lower than the node determined to be gas.

  This process is repeated until there is no node whose attribute information is not lower than the node whose attribute information is the gas-liquid attribute information adjacent to the node whose attribute information is the gas-liquid. When the control unit 5 determines that there is no node whose attribute information is not lower than the node where the attribute information adjacent to the node whose attribute information is gas-liquid is lower than the node whose gas-liquid is set, the analysis target After the position of the highest part of the air reservoir is specified, the analysis is terminated.

  The apex located at the highest position in the Z direction of the element that has been determined that the attribute information that is in contact with the air reservoir is the gas, or the attribute information that will be described later that is in contact with the air reservoir is the gas liquid. Among the elements, when the vertex is located at the highest position in the Z direction of the element located at the highest position in the Z direction, the highest part of the air pocket is determined by the X coordinate, Y coordinate, and Z coordinate of those vertices. Identify the location.

  In addition, when the highest part of the air pool is a range surrounded by the boundary between the air reservoir and the liquid paint of the element whose attribute information is determined to be gas and the element whose attribute information is determined to be gas, for example, The highest part of the air reservoir is specified using the X coordinate, Y coordinate, and Z coordinate of the node included in the element in contact with the boundary between the air reservoir and the liquid paint.

  Further, the control unit 5 compares the height of the node whose attribute information is gas-liquid and the height of the node whose attribute information is gas. As a result, the attribute information of the node whose attribute information is gas- In this case, the boundary line between the node whose attribute information is gas-liquid and the node whose attribute information is gas is detected again.

  Below, with reference to the flowchart of FIGS. 9-12, the effect | action of the air pocket analysis apparatus 1 which concerns on this embodiment is explained in full detail. In the following, detection of air pockets, correction of the boundary line, and detection of the highest part of the air pool are performed by dividing the work to be painted into elements. Comparison is made based on the height of. Further, it is assumed that there are a plurality of air pools generated in the workpiece α to be coated.

  As shown in FIG. 9, first, the shape data of the work α to be painted, which is associated by the control unit 5, is input from the keyboard 6 (step S1). Next, the workpiece α is selected as an analysis region, divided into elements (step S2), and a gravity direction G is set (step S3).

  Next, an analysis is performed as to whether or not air accumulation occurs in the workpiece α to be coated (step S4). Specifically, as shown in the flowchart of FIG. 10, in step 2, an element adjacent to the free edge of the workpiece α that is divided into the numerical calculation model is set as an initial boundary element (step S41), and further, the initial boundary element The attribute information of other elements is set to gas (step S42).

  Next, the heights in the Z direction of the barycentric points of elements whose attribute information adjacent to the initial boundary element is set to gas, that is, elements whose attribute information is not determined, are compared (step S43).

  Then, when it is determined that the height of the element whose attribute information is set to gas is higher than the height of the initial boundary element, the attribute information of the element whose attribute information is set to gas is determined to be gas. On the other hand, if it is determined that the height of the element whose attribute information is set to gas is lower than or equal to the height of the initial boundary element, the attribute information of the element whose attribute information is set to gas is changed to liquid. Then, the attribute information is determined as liquid (step S44).

  Next, it is determined whether there is an element whose attribute information is set to gas adjacent to the element whose attribute information is determined to be liquid (step S45).

  If it is determined that there is an element whose attribute information is set to gas, the attribute information adjacent to the element determined to be liquid (YES), the attribute information adjacent to the element determined to be liquid is gas And the height of the center of gravity of each set element are compared (step S46).

  If the height of an element whose attribute information is set to gas is higher than or equal to the height of the element whose attribute information is determined to be liquid, the attribute information of the element whose attribute information is set to gas is gas. If the height of the element whose attribute information is set to gas is lower than the height of the element whose attribute information is determined to be liquid, the attribute information of the element whose attribute information is set to gas is determined to be liquid ( Step S47).

  Next, it is determined whether there is an element whose attribute information is set to gas adjacent to the element whose attribute information is determined to be liquid (step S45). If it is determined that there is no element in which the attribute information adjacent to the element whose attribute information is determined to be liquid is set to gas (NO), an analysis is performed as to whether or not air accumulation occurs in the workpiece α to be coated. finish.

  Next, boundary line correction processing is performed (step S5). Specifically, as shown in the flowchart of FIG. 11, first, the boundary between the air pocket and the liquid paint is detected (step S501), the order of the boundary to be corrected is determined (step S502), and then corrected. A boundary line is determined (step S503). Next, the element (ZLmax) at the highest position among the elements whose attribute information in contact with the boundary to be corrected is the liquid is detected (step S504), and the attribute in contact with the boundary line to be corrected thereafter. The element (ZAmax) at the lowest position among the elements whose information is gas is detected (step S505).

  Then, it is determined whether ZLmax is at a position higher than ZAmax (step S506). If it is determined that ZLmax is at a higher position (YES), after changing the attribute of the element whose attribute information that is the comparison target is gas to liquid, the attribute information is determined to be liquid (step S507). . On the other hand, if it is determined in step S506 that ZLmax is not higher than ZAmax, that is, if it is determined that the height of ZAmax is higher than or equal to the height of ZLmax (NO), the correction target The boundary line that has been determined is determined (step S508). The boundary line thus determined is not subject to correction thereafter.

  After the process is performed in step S507 or step S508, it is determined whether correction has been performed for all previously detected boundary lines (step S509). When it is determined that all the boundary lines have not been corrected (NO), the boundary line to be corrected next is selected in accordance with the correction order determined in S502 (step S510), and the boundary line to be corrected is specified. (Step S503).

  On the other hand, if it is determined in step S509 that all the boundary lines have been corrected (YES), it is determined whether all the boundary lines have been determined (step S511). If it is determined that all the boundary lines are not fixed (NO), all the boundary lines are detected (step S501). On the other hand, when it is determined that all the boundary lines are fixed (YES), the highest part of the air pocket is detected (step S6).

  Specifically, as shown in the flowchart of FIG. 12, all air pockets are detected (step S601), and the order in which the detected air pools are analyzed is determined (step S602). Then, an air reservoir to be analyzed is specified in accordance with the determined order (step S603), and in the specified air reservoir, all elements whose attribute information is determined to be gas are in contact with the boundary between the air reservoir and the liquid paint. It is determined whether or not (step S604).

  If it is determined that all of the elements whose attribute information is determined to be gas are not in contact with the boundary between the air reservoir and the liquid paint (NO), the attribute information in contact with the boundary between the air reservoir and the liquid paint is The attribute information of the element determined to be liquid is changed to gas-liquid (step S605). An arbitrary element is extracted from the elements whose attribute information is determined to be gas, and the height of the element whose attribute information is determined to be gas-liquid is compared with that element (step S606). .

  Then, it is determined whether the height of the element whose attribute information is determined to be gas-liquid is lower than the height of the element whose attribute information is determined to be gas (step S607). If it is determined that the height of the element whose attribute information is determined to be gas-liquid is lower (YES), the attribute information of the element whose attribute information is gas is changed to gas-liquid (step S608). Then, the boundary line between the elements whose attribute information is determined to be gas-liquid or liquid and the elements whose attribute information is determined to be gas is detected in the air pool to be analyzed (step S609).

  And after performing the process of step S609 and when it is judged that the height of the element whose attribute information is determined to be gas-liquid in step S607 is not lower, the attribute information in contact with the boundary line is determined to be gas. It is determined whether all of the elements that have been compared are attribute information that has been determined to be the gas-liquid attribute information (step S610).

  If all of the elements whose attribute information is in contact with the boundary line are determined to be gas, if it is determined that the attribute information is not compared with the elements determined to be gas-liquid (YES), the comparison is performed Any one of the elements whose attribute information is determined to be gas is extracted, and the height of the element whose attribute information adjacent to the element is determined to be gas-liquid is compared (step S606). ).

  On the other hand, if it is determined that all the elements whose attribute information in contact with the boundary line is determined to be gas have been compared with the elements whose attribute information is determined to be gas-liquid (YES), all It is determined whether the analysis of the air pool has been completed (step S611). If it is determined that the analysis of all the air reservoirs has not been completed (NO), an air reservoir that has not been analyzed is selected in accordance with the analysis order determined in step S602 (step S612), and the air reservoir to be analyzed is selected. Specify (step S603).

  On the other hand, if it is determined that the analysis of all the air pools has been completed (YES), the process of analyzing the air pool generated in the work to be coated is animated and displayed by post-processing (step S7). That is, on the screen of the display 10, the process until the highest part of the air pool as the analysis target is detected is repeatedly displayed, and the position information of the highest part of the air pool as the analysis target is displayed. (END).

As described above, according to the invention according to the present embodiment, it is possible to analyze the occurrence of air accumulation and to detect the highest position among the portions where the air accumulation of the workpiece α to be coated has occurred. it can. Then, by providing a hole at that position, the liquid paint is allowed to flow into the position where the air pool of the work α to be coated is generated, and the portion where the air pool is generated is filled with the liquid paint to prevent the occurrence of the air pool. it can.
The subject of the present invention is not limited to the air reservoir, and any gas having a specific gravity lower than that of the liquid in the tank can be applied.

It is a schematic block diagram of an air pool analyzer. It is a schematic diagram showing the state which divided | segmented the to-be-coated workpiece | work (alpha) into the element. (A) is the figure which extracted a part of element of member X, (b) is a top view of the element of (a). (A) represents the result of analysis by comparing the height of the center of gravity of the element, and (b) compares the height of the highest vertex among the vertices of each element. (C) shows the result of analysis by comparing the height of the inner center point of the element, and (d) shows the outer center point of the element. (E) shows the result of analyzing by comparing the height of the centroid of the element, (f) Shows the result of analysis by comparing the height of the node of the element, and the attribute information of the node whose attribute information is liquid is connected to the middle point of the node that is a gas. It is the figure made into the boundary line of liquid paint. (A) shows the result of correcting the boundary line derived by analysis using the center of gravity of the element, and (b) is derived by analysis using the highest vertex among the vertices of the element. (C) shows the result of correcting the boundary line derived by the analysis using the inner center point of the element, and (d) shows the result of correcting the boundary line. This shows the result of correcting the boundary line derived from the analysis using the center point, and (e) shows the result of correcting the boundary line derived from the analysis using the centroid of the element. (F) represents the result of correcting the boundary line derived by the analysis using. (A)-(e) is the figure explaining the case where the boundary line of the detected air pocket and liquid coating material is divided | segmented into two. It is the figure which detected the air pool about the to-be-painted workpiece | work (alpha). It is a perspective view which shows the state showing the highest site | part about to-be-coated workpiece | work (alpha). It is a flowchart of the analysis of the dip coating which concerns on this embodiment. It is a flowchart of the analysis of the dip coating which concerns on this embodiment. It is a flowchart of the analysis of the dip coating which concerns on this embodiment. It is a flowchart of the analysis of the dip coating which concerns on this embodiment. It is a top view which shows the state showing the highest site | part about the to-be-coated workpiece | work (alpha).

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Air reservoir analyzer 2 Step 5 Control part 6 Keyboard 9 Keyboard controller 10 Display 11 Display controller 12 Hard disk drive 13 Flexible disk drive 14 Disk controller 15 Network 16 Network interface controller 19 System bus

Claims (14)

An input means for inputting shape data corresponding to a workpiece to be coated by immersion coating with liquid paint;
After dividing the image data of the work to be painted into a plurality of elements, the liquid or gas attribute information is given to each of the divided elements, and air pockets are detected using these elements.
The boundary between the detected air reservoir and the liquid paint is detected, and the boundary is brought closer to a horizontal line by comparing the height of the element to which the attribute information of the liquid or gas in contact with the boundary is given. Such as
For the air reservoir that has been modified to bring the boundary line closer to a horizontal line, the attribute information of the element whose attribute information is in contact with the boundary line is changed to gas-liquid, and the attribute information is changed to gas-liquid Detecting the highest part of the air reservoir by comparing the height of an element whose attribute information is determined to be gas with the attribute information adjacent to the element and using the attribute information of the element whose attribute information is determined to be gas as gas-liquid Computing means for performing
An air reservoir analyzing apparatus comprising: The calculation means determines the attribute information of the element adjacent to the free edge of the workpiece to be liquid as liquid, sets the attribute information of other elements as gas, and sets the attribute information as the element determined to be liquid. Compare the height of the adjacent attribute information in the opposite direction of gravity between the gas and the set element,
If the height of the element set as the attribute information adjacent to the gas is higher than the height of the element determined as the attribute information liquid, the attribute information of the adjacent element is determined as gas,
If the attribute information is lower than or the same as the height of the element determined to be liquid, the attribute information of the adjacent element is determined to be liquid,
Comparing the height of the element determined to be liquid with the attribute information and the height of the element determined to be gas as the attribute information until all the attribute information of elements adjacent to the element determined to be liquid is determined as the attribute information The air pool analysis device according to claim 1, wherein the air pool is detected by using the air trap. The calculation means detects a boundary line between the detected air reservoir and the liquid paint, and an attribute information that touches the boundary line is an element that is positioned at a highest position among elements that are determined to be liquid and an attribute that touches the boundary line The element located in the lowest position among the elements whose information is determined to be gas is detected, and the element whose detected attribute information is determined to be liquid and the height of the element whose detected attribute information is determined to be gas are determined. Compare and
If the detected attribute information is lower than or equal to the height of the element determined to be gas than the height of the element determined to be liquid, the attribute information of the element determined to be the detected attribute information To detect the element located at the lowest position among the elements whose attribute information in contact with the detected boundary line is determined to be gas,
If the detected attribute information is higher than the element height determined to be gas, the detected attribute information is higher than the element height determined to be liquid, the detected boundary line is determined and the detected boundary line is The air pool analysis device according to claim 1, wherein correction is performed so as to approach a horizontal line. When the calculation means detects a plurality of air pools and a boundary line of liquid paint from the workpiece to be coated, the correction means corrects the other boundary line after correcting the boundary line once. The air reservoir analysis device according to any one of claims 1 to 3, wherein the correction is performed so that the boundary between the detected air reservoir and the liquid paint approaches a horizontal line. The computing means is located at the lowest position among the elements whose attribute information in contact with the boundary line is determined to be the highest among the elements determined to be liquid and the attribute information which is in contact with the boundary line as determined to be gas. The boundary between the air reservoir and the liquid paint is detected every time the heights of the elements are compared and the height of the liquid paint is compared, so that the boundary between the detected air reservoir and the liquid paint approaches the horizontal line. The air reservoir analyzing apparatus according to claim 4, wherein the correction is performed. For the air reservoir that has been modified to bring the boundary line closer to a horizontal line,
It is judged whether all the elements whose attribute information is determined to be gas are adjacent to the boundary between the air reservoir and the liquid paint, and all the elements whose attribute information is determined to be gas are the boundary between the air reservoir and the liquid paint. If it is determined that it is adjacent to the line, identify the position of the highest part of the air reservoir,
If it is determined that all elements for which the attribute information is determined to be gas are not adjacent to the boundary between the air reservoir and the liquid paint, the attribute information of the element adjacent to the detected boundary between the air reservoir and the liquid paint is determined. The element whose attribute information is changed to gas-liquid is compared with the element whose attribute information is determined to be gas, and the attribute information is the height of the element whose gas-liquid is determined. If the attribute information is determined to be lower than or equal to the height of the element determined to be gas, the attribute information of the element determined to be gas is changed to gas-liquid, and then the air pool and liquid The attribute information that is determined to be gas-liquid and the attribute information adjacent to the element that is not yet compared is in contact with the boundary line of the paint and the attribute information that is set to gas is extracted, and the attribute information is changed to gas. The height of the selected element is attribute information When it is determined that there is no element whose attribute information is determined to be lower than or equal to that of the element that has been determined to be gas liquid, The position of the highest part of a pool is specified. The air pool analyzer according to any one of claims 1 to 5 characterized by things. The computing means changes the attribute information of the element whose attribute information is determined to be gas to liquid after comparing the height of the element whose attribute information is determined to be gas and the element whose attribute information is determined to be gas In such a case, the boundary between the element whose attribute information is determined to be gas-liquid and the element whose attribute information is determined to be gas is detected again. An input means for inputting shape data corresponding to a workpiece to be coated by immersion coating with liquid paint;
A plurality of nodes are arranged on the surface of the image data of the workpiece to be coated, and attribute information of liquid or gas is given to each of the nodes, and air pockets are detected using these nodes.
The boundary line between the detected air reservoir and the liquid paint is detected, and the boundary line is brought close to a horizontal line by comparing the heights of nodes to which the attribute information of the liquid or gas in contact with the boundary line is given. Such as
For an air reservoir that has been modified to bring the boundary line closer to a horizontal line, the attribute information of the node determined to be gas is changed to gas-liquid, and the attribute information is changed to gas-liquid. And an arithmetic unit for detecting the highest part of the air reservoir by comparing the height of the node determined by comparing the height of the node and the attribute information determined to be gas. The calculation means determines the attribute information of a node adjacent to the free edge of the workpiece to be liquid as liquid, sets the attribute information of other nodes as gas, and sets the node whose attribute information is determined as liquid. Compare the height of the adjacent attribute information in the opposite direction of gravity between the gas and the set node,
If the height of the node set as the attribute information adjacent to the gas is higher than or equal to the height of the node determined as the attribute information liquid, determine the attribute information of the adjacent node as gas,
If the attribute information is lower than the height of the node determined to be liquid, the attribute information of the adjacent node is determined to be liquid,
Comparing the height of the node determined to be liquid with the attribute information and the height of the node determined to be gas and the attribute information until all the attribute information of the nodes adjacent to the node determined to be liquid is determined to be the attribute information 9. The air pool analysis device according to claim 8, wherein the air pool is detected by using the air pool. The calculation means detects a boundary line between the detected air reservoir and liquid paint, and the attribute information in contact with the boundary line is the node located at the highest position among the nodes determined to be liquid and the attribute in contact with the boundary line The node located at the lowest position among the nodes whose information is determined to be gas is detected,
Comparing the height of the node where the detected attribute information is determined to be liquid and the node where the detected attribute information is determined to be gas;
If the detected attribute information is lower than or equal to the height of the node where the detected attribute information is determined as liquid, the attribute information of the node where the detected attribute information is determined as gas Is further changed to liquid, and further, detecting the node located at the lowest position among the nodes whose attribute information in contact with the detected boundary line is a gas,
If the detected attribute information is higher than the height of the node determined to be gas, the detected attribute information is higher than the height of the node determined to be a liquid, the detected boundary line is determined and the detected boundary line is The air pool analysis device according to claim 8 or 9, wherein correction is performed so as to approach a horizontal line. When the calculation means detects a plurality of air pools and a boundary line of liquid paint from the workpiece to be coated, the correction means corrects the other boundary line after correcting the boundary line once. The air reservoir analysis device according to claim 10, wherein correction is performed so that the boundary between the detected air reservoir and the liquid paint approaches a horizontal line. The calculation means detects a node located at the highest position among nodes whose attribute information in contact with the boundary line is liquid and a node located at the lowest position among nodes whose attribute information touching the boundary line is gas. Then, every time the heights are compared, the boundary between the air reservoir and the liquid paint is detected so that the boundary between the detected air reservoir and the liquid paint is brought close to a horizontal line. The air pool analysis device according to any one of claims 8 to 11, wherein For the air reservoir that has been modified to bring the boundary line closer to a horizontal line,
It is judged whether all the nodes whose attribute information is determined to be gas are adjacent to the boundary between the detected air pool and liquid paint, and all the nodes whose attribute information is determined to be gas are said air pool and liquid paint. If it is determined that it is adjacent to the boundary line, the position of the highest part of the air reservoir is identified,
If it is determined that all the nodes whose attribute information is determined to be gas are not adjacent to the boundary between the air reservoir and the liquid paint, the attribute information of the nodes located on the boundary between the air reservoir and the liquid paint is And the height of the node where the attribute information is determined to be gas-liquid is lower than the height of the node where the attribute information is determined to be gas. Alternatively, if the attribute information is determined to be the same, the attribute information of the node determined to be gas is changed to gas-liquid, and the attribute that is in contact with the boundary between the air reservoir and the liquid paint is not yet compared. Nodes whose information is determined to be gas-liquid and nodes whose attribute information is adjacent to that node are extracted as gas, and the height of the node whose attribute information is determined as gas is higher than the node whose attribute information is gas-liquid Repeat the determination of low, attribute When it is determined that there is no node whose attribute information is determined to be lower than or equal to the gas node, the position of the highest part of the air reservoir is specified. The air pool analysis device according to any one of claims 8 to 12. When the calculation means changes the attribute information of the element whose attribute information is gas to gas-liquid after comparing the height of the element whose attribute information is gas-liquid and the element whose attribute information is gas The air pool analysis device according to claim 13, wherein the boundary line between the element whose attribute information is gas and liquid and the element whose attribute information is gas is detected again.

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