Self-adjusting audio detection of medium jam

Patent metadata

Field	Value
Publication number	US-9395277-B2
Application number	US-201414263171-A
Country	US
Kind code	B2
Filing date	Apr 28, 2014
Priority date	Dec 6, 2011
Publication date	Jul 19, 2016
Grant date	Jul 19, 2016

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.

First claim

The invention claimed is:

1. 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;
(e) computing at least one of a moving window sum responsive to the sound values, a high amplitude count responsive to the sound values, a pre roller sum responsive to the sound values, or a post roller sum responsive to the sound values; and
(f) indicating the medium misfeed responsive to the sensitivity setting, moving window sum, high amplitude count, pre roller sum, or post roller sum.

2. 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.

3. The method of claim 2 wherein (c) (ii) includes computing the sum of sound values using a given window width.

4. The method of claim 2 wherein (c) (iii) includes computing the sum of sound values that are greater than a high amplitude sound threshold value.

5. The method of claim 2 wherein (c) (iv) includes computing a sum of sound values from a region of the medium transport path before one of the rollers.

6. The method of claim 2 wherein (c) (v) includes computing a sum of sound values from a region of the medium transport path after one of the rollers.

7. The method of claim 2 wherein (d) includes indicating a medium jam responsive to a moving window sum threshold value, a high amplitude count threshold value, a pre roller sum threshold value, or a post roller sum threshold value.

8. 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.

9. The method of claim 8 wherein (c) (iii) includes computing a frequency above a frequency extent threshold value.

10. The method of claim 8 wherein (c) (iv) includes computing the sum of frequency values using a given frame width.

11. The method of claim 8 wherein (d) includes indicating a medium jam responsive to a frequency extent threshold value, or a frame energy threshold value.

Assignees

• Kodak Alaris Inc

Inventors

• Link Bruce A
• Syracuse Anthony A
• Adams Jr James E

Classifications

• B65H5/06 Primary

  by rollers {or balls, e.g. between rollers (transport by suction rollers B65H5/226)} · CPC title

• B65H2220/03

  indicating an entity which is measured, estimated, evaluated, calculated or determined but which does not constitute an entity which is adjusted or changed by the control process per se · CPC title

• B65H2511/528

  Jam · CPC title

• B65H2557/63

  Optimisation, self-adjustment, self-learning processes or procedures, e.g. during start-up · CPC title

• G03G15/70

  Detecting malfunctions relating to paper handling, e.g. jams · CPC title