1. A method for detecting misregistration of an image forming apparatus having a plurality of cartridges, the method comprising the steps of:
forming a first pattern using one of the plurality of cartridges, the first pattern comprising a plurality of lines that are arranged substantially parallel to one another and incline in one direction by a predetermined angle;
forming a second pattern using another cartridge, the second pattern comprising a plurality of lines that are arranged at the same intervals as those of the first pattern;
forming critical points on the end most line of at least one of the first and the second patterns, the critical points being located in opposite directions away from a center of the end most line by a predetermined distance; and
overlapping the first and the second patterns and estimating a degree of misregistration between the first and the second patterns.
2. The method as claimed in claim 1, wherein
a space between two adjacent lines of the first pattern becomes gradually larger towards one direction.
3. The method as claimed in claim 1, wherein
a space between two adjacent lines of the second pattern becomes gradually larger towards one direction.
4. The method as claimed in claim 3, wherein
a reference line is formed on at least one of the first and the second patterns, the reference line forming a predetermined angle with respect to a line perpendicular to the lines of the first and the second patterns.
5. The method as claimed in claim 4, wherein
the critical points are located in opposite directions away from the reference line by a predetermined distance.
6. The method as claimed in claim 5, wherein
the first pattern is a top pattern to detect vertical misregistration, the top pattern comprising a plurality of horizontal lines inclining towards one direction by a predetermined angle, a space between two adjacent horizontal lines becoming gradually larger when moving from the top of the pattern to the bottom of the pattern.
7. The method as claimed in claim 6, wherein
the second pattern is a bottom pattern to detect vertical misregistration, the bottom pattern comprising a plurality of horizontal lines that are arranged in a vertical direction and are inclined at a symmetrical angle to the angle of the first pattern.
8. The method as claimed in claim 7, wherein
the reference line is formed on the second pattern in a horizontal direction.
9. The method as claimed in claim 8, wherein the critical points comprise
a left critical point and a right critical point that are formed on the uppermost line of the second pattern in opposite directions away from the reference line by a predetermined distance.
10. The method as claimed in claim 5, wherein
the first pattern is a top pattern to detect horizontal misregistration, the top pattern comprising a plurality of vertical lines that are arranged in a horizontal direction, a space between two adjacent vertical lines becoming gradually larger when moving from the left to the right side of the pattern.
11. The method as claimed in claim 10, wherein
the second pattern is a bottom pattern to detect horizontal misregistration, the bottom pattern comprising a plurality of vertical lines that are arranged in a horizontal direction.
12. The method as claimed in claim 11, wherein
the reference line is formed on the second pattern in a horizontal direction.
13. The method as claimed in claim 12, wherein
the critical points are an upper critical point and a lower critical point that are formed on the left most line of the second pattern in opposite directions away from the reference line by a predetermined distance.
14. The method as claimed in claim 1, further comprising the steps of:
printing the top pattern and the bottom pattern to overlap the top pattern and the bottom pattern;
photographing an image of the top pattern and the bottom pattern after they are printed;
measuring a distance between an intersection point of the top pattern and the bottom pattern and the critical point in the photographed image;
calculating a degree of misregistration between the top pattern and the bottom pattern based on the measured distance as a numerical value.
15. The method as claimed in claim 14, wherein,
if the top pattern and the bottom pattern are to detect vertical misregistration, the intersection point of the top pattern and the bottom pattern is formed at the uppermost lines, and the degree of vertical misregistration between the top pattern and the bottom pattern is calculated based on a difference between the intersection point and a right or a left critical point.
16. The method as claimed in claim 14, wherein,
if the top pattern and the bottom pattern are to detect horizontal misregistration, the intersection point of the top pattern and the bottom pattern is formed at the left most line, and the degree of horizontal misregistration between the top pattern and the bottom pattern is calculated based on a difference the intersection point and an upper or a lower critical point.
The claims below are in addition to those above.
All refrences to claim(s) which appear below refer to the numbering after this setence.
1. An apparatus for presenting task procedures of industrial plant assets to a field operator, the apparatus comprising:
an editing module accessed through a computer terminal, the editing module configured to allow a specialist to create at least one task procedure of at least one plant asset;
an integration module configured to retrieve plant information provided by at least one other plant system;
a server configured to store the at least one task procedure and the plant information;
a presentation module configured to present the at least one task procedure and the plant information; and
a mobile device configured to be operatively connectable to the server and to display to the field operator the at least one task procedure and the plant information presented by the presentation module.
2. The apparatus of claim 1, wherein the integration module is further configured to provide plant information for presentation by the presentation module where the at least one task procedure contains a link to the plant information.
3. The apparatus of claim 1, further comprising a dynamic assembling module configured to automatically modify the at least one task procedure in response to the plant information retrieved by the integration module.
4. The apparatus of claim 1, wherein the at least one task procedure comprises instructions created for presentation by the presentation module in at least one format selected from the group consisting of plain text, rich text, tables, images, document files, audio recordings, video recordings, intranet links, internet links, and executable links to views of the plant information.
5. The apparatus of claim 1, wherein the editing module is further configured to import instructions from an external document.
6. The apparatus of claim 1, wherein the editing module is further configured to export created instructions.
7. The apparatus of claim 1, wherein the at least one other plant system is selected from the group consisting of: an asset management system, a distributed control system, a diagnostics system, and a plant operating system.
8. The apparatus of claim 1, wherein the presentation module is further configured to allow navigation between presentations of different task procedures and plant information.
9. The apparatus of claim 1, wherein the presentation module is further configured to allow navigation within a presentation of the at least one task procedure.
10. The apparatus of claim 1, wherein the presentation module is further configured to provide a search function configured to search within the at least one task procedure.
11. The apparatus of claim 1, wherein the editing module is further configured to establish relationships within and between task procedures.