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Software Analysis of Warning Sense Data from Marginal Operating Devices

IP.com Disclosure Number: IPCOM000075076D
Original Publication Date: 1971-Jul-01
Included in the Prior Art Database: 2005-Feb-24
Document File: 4 page(s) / 79K

Publishing Venue

IBM

Related People

Cummings, JC: AUTHOR

Abstract

Automatic deferred maintenance, logging, and analysis of device 10 operation is provided by a plurality of threshold detection sensors 11 activating logic circuitry 12 to generate a sense byte indicating marginal or other operating conditions. A program represented by the flowchart analyzes the sense bytes to automatically determine the level of maintenance required, whether or not additional sensing should be implemented, the problem of continuing operation of device 10 in a normal manner, or causing device 10 to be operated on a reduced load factor until a selected marginal condition has been removed. A "first occurrence" or "first" flag signal is generated by circuitry 12. The program is responsive to the flag to indicate a new marginal condition.

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Software Analysis of Warning Sense Data from Marginal Operating Devices

Automatic deferred maintenance, logging, and analysis of device 10 operation is provided by a plurality of threshold detection sensors 11 activating logic circuitry 12 to generate a sense byte indicating marginal or other operating conditions. A program represented by the flowchart analyzes the sense bytes to automatically determine the level of maintenance required, whether or not additional sensing should be implemented, the problem of continuing operation of device 10 in a normal manner, or causing device 10 to be operated on a reduced load factor until a selected marginal condition has been removed. A "first occurrence" or "first" flag signal is generated by circuitry 12. The program is responsive to the flag to indicate a new marginal condition. Sensors 11 may be adjusted to detect and indicate various levels of marginal operation.

The program may include error recovery procedures (EPP) which automatically disconnect device 10, reorient a total system configuration to operate device 10 on a reduced schedule, or completely deactivate device 10.

Sensors 11 may include temperature sensing, velocity sensing, pressure sensing, or any other form of physical condition or operation sensing. The thresholds can be varied in accordance with a desired maintenance philosophy. A set of binary triggers 13 are responsive to output signals of sensors 11 first exceeding a certain threshold, to be set to an active condition. When set, triggers 13 indicate that selected conditions detected by a corresponding sensor 11 is a first occurrence. All triggers 13 being reset indicate that all selected conditions had previously been sensed as first exceeding the sensor 11 threshold. Triggers 13, reset under program control, are not again set by a continuation of the selected condition exceeding a threshold. If the condition recedes and reappears, the associated trigger is then set. The output signals of triggers 13 are supplied through OR circuit 14 for indicating when a selected condition in device 10 has not previously been detected (i.e., is a "first"). This first signal may be used to interrupt an associated data processor with which device 10 is connected. Inverter 15 indicates to AND circuits 16 that none of the triggers 13 have been set, i.e., all selected conditions that are presently exceeding their thresholds were previously sensed in that state and the conditions have continued without interruption. The output signals of sensors 11 are directly supplied to AND circuits 16 and, when the threshold of the respective sensors is exceeding the designed threshold, AND circuits 16 are enabled to pass inverter 15 supplied signal. The output signals of AND circuits 16 are, respectively, supplied through OR circuits 17 to generate a bit in a sense byte associated with device 10. Bits A, B, or C of the sense byte, when set to an active condition, respectively indicate the selected co...