Automated system for production facility

• US 5,896,292 A
• Filed: 05/31/1996
• Issued: 04/20/1999
• Est. Priority Date: 06/05/1995
• Status: Expired due to Fees

• Current Assignee: Canon Kabushiki Kaisha (Canon Inc.)
• Original Assignee: Canon Kabushiki Kaisha (Canon Inc.)
• Inventors: Ohtsuka, Hiroyuki, Yoshida, Nobuyuki, Matsuhisa, Masaru, Hosaka, Kotaro
• Primary Examiner(s): Cosimano, Edward R.
• Application Number:
  US08/660,051
• Time in Patent Office: 1,054 Days
• Field of Search: 340/825.06, 340/825.15, 340/870.01, 364/131, 364/132, 364/133, 364/134, 364/191, 364/192, 364/468.15, 364/468.16, 364/468.17, 364/550, 395/200.42, 395/200.43, 395/200.46, 395/309, 702/182, 702/188
• US Class Current: 700/108
• CPC Class Codes: G05B 19/4184 characterised by fault tolerance, reliability of production system
• CPC Class Codes: G05B 2219/31316 Output test result report after testing, inspection
• CPC Class Codes: G05B 2219/31467 Display of operating conditions of machines, workcells, selected programs
• CPC Class Codes: G05B 2219/32196 Store audit, history of inspection, control and workpiece data into database
• CPC Class Codes: G05B 2219/32407 Real time processing of data
• CPC Class Codes: G05B 2219/33156 Communication between two processors over shared, dualport ram
• CPC Class Codes: G05B 2219/36395 Load local computer program from host, data transfer ram to rom, BTR
• CPC Class Codes: G05B 2219/45188 Laserjet printer
• CPC Class Codes: Y02P 90/02 Total factory control, e.g. smart factories, flexible manufacturing systems [FMS] or integrated manufacturing systems [IMS]

Abstract

An automated system has a monitor computer, which is for remote monitoring and/or analysis of control information of an input/output control device connected to a production facility, a control computer for controlling the processes of operation of the production facility via the input/output control device, and a dual-port memory as an information transmission unit capable of transmitting the control information between the monitor computer and the control computer at a timing that is independent of control of the processes of operation, which is capable of real-time reading/writing to/from all or a part of a memory of the control computer and is written, workpiece-related data, such as status of operation, results of measurement and flags representing the sequence flow information on a per-workpiece basis or per-process basis.

Claims

1. An automated system having a monitor computer, which is for remote monitoring and/or analysis of control information from an input/output control device connected to a production facility which performs at least adjustment of a workpiece, and a control computer for controlling the processes of operation of the production facility via the input/out control device, said system comprising information transmission means capable of transmitting the control information between the monitor computer and the control computer at a timing that is independent of control of the processes of operation,

wherein said workpiece is an image forming apparatus which forms an image by exposing a photoreceptor material to a pulse-width modulated light beam, wherein the production facility has adjusting means which includes an optical system, for adjusting a reflective mirror to adjust scanning position when the light beam of said image forming apparatus scans the photoreceptor material.

2. The system according to claim 1, wherein said information transmission means is a cycle stealing system for accessing a memory, with which said control computer or said monitor computer is provided, in accordance with a CPU clock of said control computer or said monitor computer.

3. The system according to claim 1, wherein said adjusting means for adjusting said reflective mirror includes:

moving means for moving the optical system, which is interior to or exterior to said production facility, within a predetermined range; and

photometric means for measuring quantity of light obtained by moving said optical system;

wherein said optical system is moved to the position at which the quantity of light is maximized.

4. The system according to claim 1, wherein said adjusting means includes:

varying means for varying a reflecting angle of said reflective mirror of said production facility;

timekeeping means for measuring time required for the pulse-width modulated light beam to scan the predetermined range owing to rotation of a scan mirror provided in the image forming apparatus;

comparison means for comparing the time required with the predetermined value; and

calculating means which, if the time required is outside a predetermined range, calculates amount of varying of the reflecting angle of the reflective mirror from the difference between the time required and the predetermined value;

wherein the reflecting angle of said reflective mirror is varied in dependence upon the amount of varying of the reflecting angle calculated.

5. The system according to claim 1, wherein said information transmission means has a dual-port memory capable of real-time reading/writing to/from all or part of a memory provided within said control computer or said monitor computer.

6. The system according to claim 5, wherein all or part of the software in said control computer is described by a combination of a group of instructions prepared in advance exclusively for control of automated systems.

7. The system according to claim 6, wherein in execution of control of said control computer, the portion of the program described by the combination of the group of instructions prepared in advance exclusively for control of automated systems is run by said control computer while it is being translated to an executable format.

8. The system according to claim 7, wherein said dual-port memory is comprised in said control computer.

9. The system according to claim 8, wherein said automated system is a system for adjusting/measuring a laser-beam printer, which is said image forming apparatus, wherein a value relating to production performance of said laser-beam printer is analyzed based upon data relating to said laser-beam printer stored in said memory.

10. The system according to claim 5, characterized by non-resident software of said monitor computer for displaying all or part of the processes of operation of said control computer by said monitor computer.

11. The system according to claim 10, characterized by non-resident software of said monitor computer for executing, temporarily stopping and re-starting the entirety of operation of said control computer, or of a designated part thereof, from said monitor computer.

12. The system according to claim 11, wherein said dual-port memory is comprised in said control computer.

13. The system according to claim 12, wherein said automated system is a system for adjusting/measuring a laser-beam printer, which is said image forming apparatus, wherein a value relating to production performance of said laser-beam printer is analyzed based upon data relating to said laser-beam printer stored in said memory.

14. An automated system having a monitor computer, which is for remote monitoring and/or analysis of control information from an input/output control device connected to a production facility which performs at least adjustment of a workpiece, and a control computer for controlling the processes of operation of the production facility via the input/output control device, said system comprising:

data communication means for communicating data relating to said workpiece, which data have been acquired by said control computer via the input/output control device, to said monitor computer; and

storage means for storing the data relating to said workpiece, which data have been acquired by said data communication means, at said monitor computer,

wherein said workpiece is an image forming apparatus which forms an image by exposing a photoreceptor material to a pulse-width modulated light beam, wherein the production facility has adjusting means, which includes an optical system, for adjusting a reflective mirror to adjust scanning position when the light beam of said image forming apparatus scans the photoreceptor material.

15. The system according to claim 14, wherein said information transmission means has a dual-port memory capable of real-time reading/writing to/from all or part of a memory provided within said control computer or said monitor computer.

16. The system according to claim 14, wherein said adjusting means for adjusting said reflective mirror includes:

moving means for moving the optical system, which is interior to or exterior to said production facility, within a predetermined range; and

photometric means for measuring quantity of light obtained by moving said optical system;

wherein said optical system is moved to the position at which the quantity of light is maximized.

17. The system according to claim 14, wherein said adjusting means includes:

varying means for varying a reflecting angle of said reflective mirror of said production facility;

timekeeping means for measuring time required for the pulse-width modulated light beam to scan the predetermined range owing to rotation of a scan mirror provided in the image forming apparatus;

comparison means for comparing the time required with a predetermined value; and

calculating means which, if the time required is outside the predetermined range, calculates amount of varying of the reflecting angle of the reflective mirror from the difference between the time required and the predetermined value;

wherein the reflecting angle of said reflective mirror is varied in dependence upon the amount of varying of the reflecting angle calculated.

18. The system according to claim 14, wherein said data communication means performs communication at a timing that is independent of the monitoring/analysis operation of said monitor computer or of the control operation of said control computer.

19. The system according to claim 18, wherein said data communication means transmits the data related to said image forming apparatus to said monitor computer, on a per-image forming apparatus basis, when one process in the operation of the production facility ends.

20. The system according to claim 18, wherein said data communication means transmits the data related to said image forming apparatus to said monitor computer, on a per-image forming apparatus basis, when all processes in the operation of the production facility are completed.

21. The system according to claim 18, wherein said automated system is a system for adjusting/measuring a laser-beam printer, which is said image forming apparatus, wherein a value relating to production performance of said laser-beam printer is analyzed based upon data relating to the laser-beam printer stored in said memory means.

22. An automated system having a monitor computer, which is for remote monitoring and/or analysis of control information from an input/output control device connected to a production facility which performs at least adjustment of workpieces, and a control computer for controlling the processes of operation of the production facility via the input/output control device, said system comprising memory means which, when each process in the production facility ends, stores data representing the process ended in said control computer per each workpiece of said workpieces,

wherein said workpiece is an image forming apparatus which forms an image by exposing a photoreceptor material to a pulse-width modulated light beam, wherein the production facility has adjusting means, which includes an optical system, for adjusting a reflective mirror to adjust scanning position when the light beam of said image forming apparatus scans the photoreceptor material.

23. The system according to claim 22, wherein said adjusting means for adjusting said reflective mirror includes:

moving means for moving the optical system, which is interior to or exterior to said production facility, within a predetermined range; and

photometric means for measuring quantity of light obtained by moving said optical system;

wherein said optical system is moved to the position at which the quantity of light is maximized.

24. The system according to claim 22, wherein said adjusting means includes:

varying means for varying a reflecting angle of said reflective mirror of said production facility;

timekeeping means for measuring time required for the pulse-width modulated light beam to scan the predetermined range owing to rotation of a scan mirror provided in the image forming apparatus;

comparison means for comparing the time required with the predetermined value; and

calculating means which, if the time required is outside a predetermined range, calculates amount of varying of the reflecting angle of the reflective mirror from the difference between the time required and the predetermined value;

wherein the reflecting angle of said reflective mirror is varied in dependence upon the amount of varying of the reflecting angle calculated.

25. The system according to claim 22, further comprising communication means for communicating the data representing the process ended to said monitor computer;

wherein the data acquired by said communication means is displayed on said monitor computer.

26. The system according to claim 25, wherein said communication means performs communication at a timing that is independent of the monitoring/analysis operation of said monitor computer or of the control operation of said control computer.

27. The system according to claim 26, wherein said automated system is a system for adjusting/measuring a laser-beam printer, which is said image forming apparatus, wherein a value relating to production performance of said laser-beam printer is analyzed based upon data relating to said laser-beam printer stored in said memory means.

28. An automated system having a monitor computer, which is for remote monitoring and/or analysis of control information from an input/output control device connected to a production facility which performs at least adjustment of workpieces, and a control computer for controlling the processes of operation of the production facility via the input/output control device, said system comprising memory means which, when sequence processing in said control computer ends, stores data representing the sequence process ended in said control computer per each workpiece of said workpieces,

wherein said workpiece is an image forming apparatus which forms an image by exposing a photoreceptor material to a pulse-width modulated light beam, wherein the production facility has adjusting means, which includes an optical system, for adjusting a reflective mirror to adjust scanning position when the light beam of said image forming apparatus scans the photoreceptor material.

29. The system according to claim 28, wherein said adjusting means for adjusting said reflective mirror includes:

moving means for moving the optical system, which is interior to or exterior to said production facility, within a predetermined range; and

photometric means for measuring quantity of light obtained by moving said optical system;

wherein said optical system is moved to the position at which the quantity of light is maximized.

30. The system according to claim 28, wherein said adjusting means includes:

varying means for varying a reflecting angle of said reflective mirror of said production facility;

timekeeping means for measuring time required for the pulse-width modulated light beam to scan the predetermined range owing to rotation of a scan mirror provided in the image forming apparatus;

comparison means for comparing the time required with the predetermined value; and

calculating means which, if the time required is outside a predetermined range, calculates amount of varying of the reflecting angle of the reflective mirror from the difference between the time required and the predetermined value;

wherein the reflecting angle of said reflective mirror is varied in dependence upon the amount of varying of the reflecting angle calculated.

31. The system according to claim 28, further comprising communication means for communicating the data representing the sequence processing ended to said monitor computer;

wherein the data acquired by said communication means is displayed on said monitor computer.

32. The system according to claim 31, wherein said communication means performs communication at a timing that is independent of the monitoring/analysis operation of said monitor computer or of the control operation of said control computer.

33. The system according to claim 32, wherein said automated system is a system for adjusting/measuring a laser-beam printer, which is said image forming apparatus, wherein a value relating to production performance of said laser-beam printer is analyzed based upon data relating to said laser-beam printer stored in said memory means.

34. An automated system having a monitor computer, which is for remote monitoring and/or analysis of control information from an input/output control device connected to a production facility which performs at least adjustment of a workpiece, and a control computer for controlling the processes of operation of the production facility via the input/output control device, said system comprising:

information transmission means capable of transmitting the control information between the monitor computer and the control computer at a timing that is independent of control of the processes of operation,

wherein said monitor computer has an editor program for creating the software of said monitor computer and/or said control computer, a compiler program for compiling the software of said monitor computer and/or said control computer, a debugger program for debugging the software of said monitor computer and/or said control computer, a data analyzing program for analyzing the data of the input/output control device, and a menu program for managing start-up/shut-down of a monitoring program which monitors operation of said control computer, and

said workpiece is an image forming apparatus which forms an image by exposing a photoreceptor material to a pulse-width modulated light beam, wherein the production facility has adjusting means, which includes an optical system, for adjusting a reflective mirror to adjust scanning position when the light beam of said image forming apparatus scans the photoreceptor material.

35. The system according to claim 34, wherein said information transmission means performs communication at a timing that is independent of the monitoring/analysis operation of said monitor computer or of the control operation of said control computer.

36. The system according to claim 34, wherein said adjusting means for adjusting said reflective mirror includes:

moving means for moving the optical system, which is interior to or exterior to said production facility, within a predetermined range; and

photometric means for measuring quantity of light obtained by moving said optical system;

wherein said optical system is moved to the position at which the quantity of light is maximized.

37. The system according to claim 34, wherein said adjusting means includes:

varying means for varying a reflecting angle of said reflective mirror of said production facility;

timekeeping means for measuring time required for the pulse-width modulated light beam to scan the predetermined range owing to rotation of a scan mirror provided in the image forming apparatus;

comparison means for comparing the time required with a predetermined value; and

calculating means which, if the time required is outside the predetermined range, calculates amount of varying of the reflecting angle of the reflective mirror from the difference between the time required and the predetermined value;

wherein the reflecting angle of said reflective mirror is varied in dependence upon the amount of varying of the reflecting angle calculated.

38. The system according to claim 34, wherein said information transmission means is a dual-port memory capable of real-time reading/writing to/from all or part of a memory provided within said control computer or said monitor computer.

39. The system according to claim 38, wherein all or part of the program managed in said menu program is a program described by a combination of a group of instructions prepared in advance exclusively for control of automated systems.

40. The system according to claim 39, wherein functions possessed by the program managed in said menu program are assigned in advance to a plurality of keys provided on data input means possessed by said monitor computer.

41. The system according to claim 40, wherein said automated system is a system for adjusting/measuring a laser-beam printer, which is image forming apparatus, wherein a value relating to production performance of said laser-beam printer is analyzed based upon data relating to said laser-beam printer, said data has been acquired by said information transmission means.