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Automatic Operator Notification of Sensor Performance Degradation

IP.com Disclosure Number: IPCOM000041926D
Original Publication Date: 1984-Mar-01
Included in the Prior Art Database: 2005-Feb-03
Document File: 2 page(s) / 32K

Publishing Venue

IBM

Related People

Gallman, TW: AUTHOR [+2]

Abstract

An electromechanical machine, such as a bank check reader/sorter, employs optical sensors to track the movement of unit records. The operating condition of the sensors is quantitatively measured with respect to pre-established limits. Measurements that fall outside the established limits cause a display to an operator indicating that corrective action is required. The measurements are recorded in a historical log to assist in problem diagnosis and trend analysis. Optical sensor 10 comprises a light-emitting diode (LED) 11 and photo-detector 12. The light given off by LED 11 is controlled by a digital-to-analog (D/A) circuit 13 which responds to counter circuit 14 to progressively increase the light emitted by diode 11.

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Automatic Operator Notification of Sensor Performance Degradation

An electromechanical machine, such as a bank check reader/sorter, employs optical sensors to track the movement of unit records. The operating condition of the sensors is quantitatively measured with respect to pre-established limits. Measurements that fall outside the established limits cause a display to an operator indicating that corrective action is required. The measurements are recorded in a historical log to assist in problem diagnosis and trend analysis. Optical sensor 10 comprises a light-emitting diode (LED) 11 and photo-detector
12. The light given off by LED 11 is controlled by a digital-to-analog (D/A) circuit 13 which responds to counter circuit 14 to progressively increase the light emitted by diode 11. Each test of the transducer 10 begins by reset of latch 15 which, through inverter 16, provides an enabling input to AND gate 17. The reset signal also resets counter 14 to 0. Pulses supplied on line 18 are gated by AND gate 17 to counter 14, and LED 11 progressively generates more light to detector
12. When detector 12 reaches the point that a signal is produced on its output line 19, latch 15 is set, thereby disabling AND gate 17. The contents of counter 14 thus are a measure of the performance of the transducer 10. This count can be compared to a pre-set threshold count to cause display of an error message, and can also be stored in a historical log with reference to the particula...