Abnormality detection method and apparatus
AssigneeEht International Inc.
InventorsPatrick Lalonge, Philip Neron
Life of this patent
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Abstract
There is provided a system and method for detecting an abnormal operation of a motor controlling an operating parameter of a machine. Both a torque of the motor and the operating parameter are monitored. A memory stores a plurality of predetermined torque values indicative of a normal operation of the motor. A plurality of operating parameter values are also stored in the memory with each operating parameter value having a corresponding predetermined torque value associated therewith. The predetermined torque value corresponding to the monitored operating parameter is retrieved from the memory and compared to the monitored torque value to detect an abnormal operation of the motor.
Claims20
A system for detecting an abnormal operation of a motor repeatedly executing a task for controlling at least one machine parameter of a machine, the system comprising:
- a memory having stored therein a plurality of associated values of a machine parameter and a motor parameter, the associated values of the machine parameter and the motor parameter obtained upon past execution of the task by the motor and indicative of a normal operation of the motor;
- a processor;
- and
- at least one application stored in the memory and executable by the processor for:
- receiving, upon the motor currently executing the task, a measurement of a motor operating parameter and a measurement of a machine operating parameter,
- identifying in the memory at least one machine parameter value corresponding to the received measurement of the machine operating parameter,
- retrieving from the memory a motor parameter value associated with the at least one machine parameter value, and
- comparing the retrieved motor parameter value to the received measurement of the motor operating parameter to detect the abnormal operation of the motor.
A computer-implemented method for detecting an abnormal operation of a motor repeatedly executing a task for controlling at least one machine parameter of a machine, the method comprising:
- upon the motor currently executing the task, receiving a measurement of a motor operating parameter and receiving a measurement of a machine operating parameter;
- identifying, in a memory having stored therein a plurality of associated values of a machine parameter and a motor parameter obtained upon past execution of the task by the motor and indicative of a normal operation of the motor, at least one machine parameter value corresponding to the received measurement of the machine operating parameter;
- retrieving from the memory a motor parameter value associated with the at least one machine parameter value, and
- comparing the retrieved motor parameter value to the received measurement of the motor operating parameter to detect the abnormal operation of the motor.
A computer readable medium having stored thereon program code executable by a processor for detecting an abnormal operation of a motor repeatedly executing a task for controlling at least one machine parameter of a machine, the program code executable for:
- upon the motor currently executing the task, receiving a measurement of a motor operating parameter and receiving a measurement of a machine operating parameter;
- identifying in a memory having stored therein a plurality of associated values of a machine parameter and a motor parameter obtained upon past execution of the task by the motor and indicative of a normal operation of the motor, at least one machine parameter value corresponding to the received measurement of the machine operating parameter;
- retrieving from the memory a motor parameter value associated with the at least one machine parameter value, and
- comparing the retrieved motor parameter value to the received measurement of the motor operating parameter to detect the abnormal operation of the motor.
Dependencies are inferred from the claim text.