Image forming apparatus provided with self-diagnosis system

Details Image forming apparatus provided with self-diagnosis system Image forming apparatus provided with self-diagnosis system

1994-09-01

1995-11-14

Beausoliel, Jr., Robert W.

Boots, shoes, and leggings

395 50, 395 54, 395911, 3642763, 3642689, 3642819, 3642212, 364285, 3642664, 364265, 364525, G06F 1100

Patent

active

054673550

ABSTRACT:
In an image forming machine, an objective model storage device stores parameter data that represent elements of the machine and relationships among such parameters, and parameter membership functions, and fault diagnosis knowledge. A degradation storage device stores a fuzzy qualitative value for a parameter changed by degradation of an element of the machine. Preferably, degradation indicative data are converted into fuzzy qualitative values, and the value of the parameter changed by degradation is represented by a fuzzy qualitative value. The machine includes sensors for sensing functional states thereof, and providing state data representative of such states. The state data sensed by the sensors are converted into fuzzy qualitative values. Then, a fault judgement device determines whether or not a fault exists by comparing the obtained fuzzy qualitative values with the parameter data stored in the objective model storage device. If the fault judgement device determines that a fault exists, a fault diagnosis device performs fault diagnosis by utilizing, as an initial value, the value of the parameter changed by degradation. A specification device specifies fault causes by comparing the result of the diagnosis with the state data which was converted into the fuzzy qualitative values. Then, a repair device operates actuators of the machine to overcome the specified fault.

REFERENCES:
patent: 4878072 (1989-10-01), Reinten
patent: 4879577 (1989-11-01), Mabrouk et al.
patent: 5127005 (1992-06-01), Oda et al.
patent: 5138618 (1992-08-01), Honda et al.
patent: 5166934 (1992-11-01), Tomiyama et al.
patent: 5177621 (1993-01-01), Ohtaki et al.
patent: 5239547 (1993-08-01), Tomiyama et al.
Translated Abstract for Laid-Open Patent No. 63-240601.
Translated Abstract for Laid-Open Patent No. 63-255701.
Umeda et al, "Model Based Diagnosis Using Qualitative Reasoning", as reprinted in Kimura and Rotstades, editors, Computer Applications in Production and Engineering, Cape 1989, Tokyo, Japan, pp. 443-450 (2-5 Oct. 1989).
Benjamin Kuipers, "Qualitative Simulation", Artificial Intelligence, 29, pp. 289-338 (1986).
Jeff Shrager, et al, "Issues in the Pragmatics of Qualitative Modeling: Lessons Learned from a Xerographics Project", Communications of the ACM, vol. 30, No. 12, pp. 1036-1047 (Dec. 1987).
Nishida, an article made available to the public on Jul. 23, 1990 at a meeting of the Artificial Intelligence Society in Japn; and an English translation of sections 10.2 and 10.3 of the Nishida article.

Affiliated with

Also associated with

Rating

Image forming apparatus provided with self-diagnosis system does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Image forming apparatus provided with self-diagnosis system, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Image forming apparatus provided with self-diagnosis system will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1226330