Online performance monitoring and fault diagnosis technique for direct current motors as used in printer mechanisms
First Claim
1. In a control system for controlling mechanical equipment having, in combination, at least one direct current electrical motor and at least one operating component connected for functional operation thereby, said control system having a routine for monitoring in real time preselected conditions in said equipment, a method of performing real time diagnosis of a fault condition comprising the steps of:
- selecting conditions of operation corresponding to acceptable equipment functions;
monitoring said conditions during the operation of said equipment;
initiating a fault diagnosis subroutine in real time, while said equipment operation is continuing, when a monitored condition deviates from a condition selected as being acceptable;
identifying which of said selected conditions from which said monitored condition deviates; and
establishing an error message to indicate the identified condition while said equipment is operating.
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Accused Products
Abstract
A technique that performs both real time and online monitoring and fault diagnosis during the operation of mechanical equipment with at least one direct current motor. The method described includes the steps of selecting conditions of operation that correspond to acceptable equipment functioning, and monitoring these conditions continuously during the operation of the equipment. When a fault develops, the monitoring routine initiates a diagnosis subroutine which identifies the component causing the fault and establishes an error message to indicate the faulty component, prior to the initiation of equipment shutdown procedures.
53 Citations
15 Claims
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1. In a control system for controlling mechanical equipment having, in combination, at least one direct current electrical motor and at least one operating component connected for functional operation thereby, said control system having a routine for monitoring in real time preselected conditions in said equipment, a method of performing real time diagnosis of a fault condition comprising the steps of:
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selecting conditions of operation corresponding to acceptable equipment functions; monitoring said conditions during the operation of said equipment; initiating a fault diagnosis subroutine in real time, while said equipment operation is continuing, when a monitored condition deviates from a condition selected as being acceptable; identifying which of said selected conditions from which said monitored condition deviates; and establishing an error message to indicate the identified condition while said equipment is operating. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A method of performing real time diagnosis of a fault condition in a system having a routine for monitoring preselected conditions in real time for controlling mechanical equipment with electrical motor means for operating predetermined functions, said method comprising:
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selecting conditions of operation that corresponds to acceptable equipment functions; monitoring said conditions during the operation of said equipment; initiating a fault diagnosis subroutine in real time, while said equipment operation is continuing, only when an unacceptable condition is detected by said monitoring of said conditions; and identifying said unacceptable condition detected by said monitoring, including identifying a component causing said unacceptable condition, during continuing operation of said equipment. - View Dependent Claims (12, 13, 14, 15)
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Specification