Self-adjusting audio detection of medium jam
AssigneeKodak Alaris Inc.
InventorsBruce A. Link, Anthony A. Syracuse, James E. Adams, JR.
Life of this patent
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Abstract
A method of indicating a medium misfeed along a medium transport path comprising one or more rollers for conveying the medium along the medium transport path; a microphone for detecting the sound of the conveyed medium and producing a signal representing the sound; a processor for producing sound values from the signal; providing a sensitivity setting responsive to the sound values; and indicating the medium misfeed responsive to the sound values and the sensitivity setting.
Claims11
A method of indicating a medium misfeed along a medium transport path comprising:
- (a) one or more rollers for conveying the medium along the medium transport path;
- (b) a microphone for detecting the sound of the conveyed medium and producing a signal representing the sound;
- (c) a processor for producing sound values from the signal;
- (d) providing a sensitivity setting responsive to the sound values;
- and
- (e) indicating the medium misfeed responsive to the sound values and the sensitivity setting.
A method of indicating a medium misfeed along a medium transport path comprising:
- (a) one or more rollers for conveying the medium along the medium transport path;
- (b) a microphone for detecting the sound of the conveyed medium and producing a signal representing the sound;
- (c) a processor for producing sound values from the signal;
- and
- (i) providing a sensitivity setting responsive to the sound values;
- (ii) computing a moving window sum responsive to the sound values;
- (iii) computing a high amplitude count responsive to the sound values;
- (iv) computing a pre roller sum responsive to the sound values;
- (v) computing a post roller sum responsive to the sound values;
- and
- (d) indicating the medium jam responsive to the sensitivity setting, moving window sum, high amplitude count, pre roller sum, or post roller sum.
A method of indicating a medium misfeed along a medium transport path comprising:
- (a) one or more rollers for conveying the medium along the medium transport path;
- (b) a microphone for detecting the sound of the conveyed medium and producing a signal representing the sound;
- (c) a processor for producing sound values from the signal;
- and
- (i) providing a sensitivity setting responsive to the sound values;
- (ii) providing frequency values from the sound values;
- (iii) computing a frequency extent responsive to the frequency values;
- and
- (iv) computing a frame energy responsive to the frequency values;
- (d) indicating the medium jam responsive to the sensitivity setting, frequency extent, or frame extent.
Dependencies are inferred from the claim text.