1. A method for positioning a magnetic-recording head, said method comprising:
correcting amplitude of each burst signal of a plurality of burst signals read out with said magnetic-recording head from each respective burst pattern of a plurality of burst patterns;
computing a deviation of said magnetic-recording head from a track based on corrected amplitudes of said plurality of burst signals; and
positioning said magnetic-recording head on said track based on said deviation of said magnetic-recording head, wherein said amplitude of each burst signal of said plurality of burst signals is corrected based on misalignment information that is obtained before said deviation of said magnetic-recording head is computed and related to said misalignment of each of said burst patterns perpendicular to said scanning direction and wherein said amplitude of each of said burst signals is corrected based on amplitude-characteristic information related to said relationship between a position in said burst patterns and said amplitudes of said burst signals and wherein said amplitude-characteristic information comprises said amplitude gradients of said burst signals read out from at least two positions interposing said position where said burst signals are read out with said magnetic-recording head in said burst patterns.
2. The method of claim 1, wherein said misalignment information comprises said deviation of said magnetic-recording head that has occurred when said burst patterns were formed.
3. The method of claim 1, wherein new burst patterns are formed with said magnetic-recording head positioned on said track based on computing said deviation of said magnetic-recording head.
4. The method of claim 3, wherein said deviation of said magnetic-recording head that has occurred when said new burst patterns were formed is stored in a memory as said misalignment information.
5. The method of claim 1, wherein the amplitude-characteristic information comprises said amplitude gradients of said burst signals at said position where said burst signals are read out with said magnetic-recording head in said burst patterns.
6. The method of claim 1, wherein said amplitude-characteristic information of each of said burst patterns is obtained from tracks such that each of said tracks is chosen at intervals of a prescribed number of tracks.
7. The method of claim 1, wherein a correction quantity of said amplitude of each of said burst signals is obtained before each of said burst signals is read out with said magnetic-recording head.
8. A method for positioning a magnetic-recording head, said method comprising:
correcting amplitude of each burst signal of a plurality of burst signals read out with said magnetic-recording head from each respective burst pattern of a plurality of burst patterns;
computing a deviation of said magnetic-recording head from a track based on corrected amplitudes of said plurality of burst signals; and
positioning said magnetic-recording head on said track based on said deviation of said magnetic-recording head, wherein a correction quantity of said amplitude of each of said burst signals is obtained before each of said burst signals is read out with said magnetic-recording head.
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. A closed loop location detection system for use in monitoring simultaneously the presence or absence of objects in at least two locations in a manufacturing process, comprising at least one detectable element per location and adapted to be associated with a respective object to be monitored, and at least one detecting device adapted to detect the detectable elements of the objects and so determine whether objects are present in, or absent from, all of the locations being monitored wherein said closed loon location detection system uses RFID technology, said detection device comprising at least one antenna and said detectable element comprising at least one RF tag, and wherein said antenna is adapted to monitor more than one location, a position tag being associated with each location and means to deactivate said position tag being provided on each object, whereby when the object is fed to a given location, said means to deactivate, provided on said given object, cause said position tag associated with said given location to stop being detected by said antenna thereby determining that a specific object has been fed to a specific location.
2. A closed loop location detection system as defined in claim 1, wherein means are provided for causing an object to be fed to a location determined to be devoid of objects by said detecting device.
3. A closed loop location detection system as defined in claim 1, wherein there is provided one said antenna for each location to be monitored, whereby for a given location, a respective antenna detects the presence or absence of a respective tag thereby determining whether an object is present in said given location.
4. A closed loop location detection system as defined in claim 1, wherein validation means are provided to ensure that only an intended object is fed to a given location.
5. A closed loop location detection system as defined in claim 1, wherein validation means are provided to determine if an improper object has been fed to a location.
6. A closed loop location detection system as defined in claim 1, wherein validation means are provided for at least one of determining if an improper object has been fed to a location and of ensuring that the object in a location is as intended.
7. A closed loop location detection system as defined in claim 6, wherein said RF tag includes information about the object associated therewith, said validation means being adapted to read said information so as to identify locations having improper objects.
8. A method in a closed loop for monitoring simultaneously the presence or absence of objects in at least two locations in a manufacturing process, comprising the steps of:
(a) providing at least one detectable element per location, said detectable element being associated with a respective object to be monitored;
(b) providing at least one detecting device adapted to detect the detectable elements of the objects; and
(c) determining via information gathered by said detecting device whether objects are present in, or absent from, each of the locations being monitored; wherein said detection device comprises at least one antenna and said detectable element comprises at least one RF tag, and wherein said antenna is adapted to monitor more than one location, a position tag being associated with each location and means to deactivate said position tag being associated with each object, whereby when the object is fed to a given location, said means to deactivate, associated with said given object, cause said position tag associated with said given location to stop being detected by said antenna thereby determining that a specific object has been fed to a specific location.
9. A closed loop method as defined in claim 8, wherein after step (c) at least one object is fed to each location determined to be devoid of objects in step (c).
10. A closed loop method as defined in claim 8, wherein there is provided one said antenna for each location to be monitored, whereby for a given location, a respective antenna detects the presence or absence of a respective tag thereby determining whether an object is present in said given location.
11. A closed loop method as defined in claim 8, wherein validation means are provided to ensure that only an intended object is fed to a given location.
12. A closed loop method as defined in claim 8, wherein validation means are provided to determine in step (c) if an improper object has been fed to a location.
13. A closed loop method as defined in claim 8, wherein validation means are provided for, in step (c), at least one of determining if an improper object has been fed to a location and of ensuring that the object in a location is as intended.
14. A closed loop method as defined in claim 13, wherein said RF tag includes information about the object associated therewith, said validation means being adapted to read said information so as to identify in step (c) locations having improper objects.
15. A method in a closed loop for monitoring simultaneously the presence or absence of objects in at least two locations in a manufacturing process, comprising the steps of:
(a) providing a RF tag for each object to be monitored;
(b) determining the presence or absence of a tag at each location; and
(c) feeding at least one object to each location where no tag was detected in step (b) and where a substitute object is desired; wherein the objects are feeders, each feeder containing components, each component having been associated with its respective feeder, means being provided to generate a signal when a component is removed from its feeder thereby allowing to associate a new component positioned in the feeder with this feeder.
16. A closed loop method as defined in claim 15, wherein the tags in step (a) are attached to the objects.
17. A closed loop method as defined in claim 15, wherein the objects include feeders.
18. A closed loop method as defined in claim 17, wherein the feeders contain at least one of: (1) tape and reel; (2) trays; and (3) tubes.
19. A computer readable medium adapted to store computer readable instructions thereon, the computer readable instructions comprising the method of claim 8.
20. A closed loop location detection system for use in monitoring simultaneously the presence or absence of feeders in at least two locations in a manufacturing process, comprising at least one detectable element per location and adapted to be associated with a respective feeder to be monitored, at least one detecting device adapted to detect the detectable elements of the feeders and so determine whether feeders are present in, or absent from, all of the locations being monitored, each feeder containing components, each component having been associated with its respective feeder, means to generate a signal when a component is removed from its feeder thereby allowing to associate a new component positioned in the feeder with this feeder.
21. A closed loop location detection system as defined in claim 20, wherein means are provided for causing a feeder to be fed to a location determined to be devoid of feeders by said detecting device.
22. A closed loop location detection system as defined in claim 20, wherein said closed loop location detection system uses RFID technology, said detection device comprising at least one antenna and said detectable element comprising at least one RF tag.
23. A closed loop location detection system as defined in claim 22, wherein there is provided one said antenna for each location to be monitored, whereby for a given location, a respective antenna detects the presence or absence of a respective tag thereby determining whether a feeder is present in said given location.
24. A closed loop location detection system as defined in claim 22, wherein said antenna is adapted to monitor more than one location, a position tag being associated with each location and means to deactivate said position tag being provided on each feeder, whereby when the feeder is fed to a given location, said means to deactivate, provided on said given feeder, cause said position tag associated with said given location to stop being detected by said antenna thereby determining that a specific feeder has been fed to a specific location.
25. A closed loop location detection system as defined in claim 20, wherein validation means are provided to ensure that only an intended feeder is fed to a given location.
26. A closed loop location detection system as defined in claim 20, wherein validation means are provided to determine if an improper feeder has been fed to a location.
27. A closed loop location detection system as defined in claim 22, wherein validation means are provided for at least one of determining if an improper feeder has been fed to a location and of ensuring that the feeder in a location is as intended.
28. A closed loop location detection system as defined in claim 27, wherein said RF tag includes information about the feeder associated therewith, said validation means being adapted to read said information so as to identify locations having improper feeders.
29. A closed loop location detection system as defined in claim 20, wherein said means to generate a signal comprise a switching device adapted to be triggered when a component is removed from the feeder.
30. A closed loop location detection system as defined in claim 29, wherein said switching device, when triggered, is adapted to indicate the absence of a feeder.
31. A closed loop location detection system as defined in claim 29, wherein said switching device, when triggered, is independent from the detecting device.
32. A method in a closed loon for monitoring simultaneously the presence or absence of objects in at least two locations in a manufacturing process, comprising the steps of:
(a) providing at least one detectable element per location, said detectable element being associated with a respective object to be monitored;
(b) providing at least one detecting device adapted to detect the detectable elements of the objects; and
(c) determining via information gathered by said detecting device whether objects are present in, or absent from, each of the locations being monitored; wherein the objects are feeders, each feeder containing components, each component having been associated with its respective feeder, means being provided to generate a signal when a component is removed from its feeder thereby allowing to associate a new component positioned in the feeder with this feeder.
33. A closed loop method as defined in claim 32, wherein said means to generate a signal comprise a switching device adapted to be triggered when a component is removed from the feeder.
34. A closed loop method as defined in claim 33, wherein said switching device, when triggered, is adapted to indicate the absence of a feeder.
35. A closed loop method as defined in claim 33, wherein said switching device, when triggered, is independent from the detecting device.
36. A closed loop method as defined in claim 15, wherein said means to generate a signal comprise a switching device adapted to be triggered when a component is removed from the feeder.
37. A closed loop method as defined in claim 36, wherein said switching device, when triggered, is adapted to indicate the absence of a feeder.
38. A closed loop method as defined in claim 36, wherein said switching device, when triggered, is independent from the detecting device.
39. A closed loop method as defined in claim 15, wherein the feeders contain at least one of: (1) tape and reel; (2) trays; and (3) tubes.
40. A computer readable medium adapted to store computer readable instructions thereon, the computer readable instructions comprising the method of claim 32.
41. A computer readable medium adapted to store computer readable instructions thereon, the computer readable instructions comprising the method of claim 15.