SENSOR SYSTEM FOR A CONVEYOR BELT

• US 20100025198A1
• Filed: 08/04/2008
• Published: 02/04/2010
• Est. Priority Date: 08/04/2008
• Status: Active Grant

• Current Assignee: ContiTech USA, Inc. (Continental AG)
• Original Assignee: Advanced Imaging Technologies (Pty) Ltd. (Continental AG)
• Inventors: Wallace, Jack Bruce, Alport, Michael John, Basson, Jacques Frederick
• Granted Patent: US 7,810,634 B2
• Time in Patent Office: Days
• US Class Current: 198/810.20
• CPC Class Codes: B65G 15/36 the layers incorporating ropes, chains, or rolled steel sections
• CPC Class Codes: B65G 43/02 detecting dangerous physical condition of load carriers, e.g. for interrupting the drive in the event of overheating

Abstract

A monitoring system is provided for a moving conveyor belt having a plurality of embedded reinforcing cords and identification tags. A tag reader detects and identifies the identification tags passing by the tag reader while a belt monitor scans the cords to detect a plurality of magnetic reference points and a damage event of at least one cord. A control unit in communication with the belt monitor and the tag reader analyzes the belt monitor to identify the plurality of magnetic reference points and the damage event. The control unit also acquires a belt location on the moving conveyor belt from a belt map based on the detected and identified identification tag and a magnetic reference point from the plurality of magnetic reference points. When a damage event is identified, a location of the damage event is determined by the control unit based on the acquired belt location.

Claims

1. A monitoring system for a moving conveyor belt having a plurality of embedded reinforcing cords and a plurality of identification tags spaced along a length of the conveyor belt, the system comprising:

a tag reader for detecting and identifying the presence of an identification tag from among the plurality of identification tags passing by the tag reader;

a belt monitor configured to detect a plurality of magnetic reference points and a damage event in the conveyor belt; and

a control unit in communication with the belt monitor and the tag reader, the control unit operable to assess the damage event as well as detect a location of the damage event relative to a magnetic reference point from among the plurality of magnetic reference points and based on the detected and identified identification tag.

2. The monitoring system of claim 1, wherein the conveyor belt includes a pulley layer, a carcass layer, and a carry layer, the plurality of cords are disposed within the carcass layer, and the plurality of identification tags are embedded within the conveyor belt.

3. The monitoring system of claim 1, wherein the magnetic reference point from among the plurality of magnetic reference points is a splice from among a plurality of splices.

4. The monitoring system of claim 1, wherein the control unit is further operable to determine a severity of the damage event.

5. The monitoring system of claim 4, wherein the control unit is further operable to determine that the damage event is not a critical damage event, and the system further comprises:

an alarm provided in response to identifying the damage event; and

an display to notify an operator of the monitoring system of recommended actions and the location of the damage event.

6. The monitoring system of claim 4, wherein the control unit is further operable to identify that the damage event is a critical damage event and, in response, immobilize the movement of the conveyor belt, and the system further comprises:

an alarm provided in response to identifying that the damage event is a critical damage event; and

an display to notify an operator of the system of the location of the damage event.

7. The monitoring system of claim 1, wherein the belt monitor includes a magnet to magnetize the at least one cord of the conveyor belt as the conveyor belt moves and a sensor array longitudinally spaced from the magnet and configured to measure a magnetic field of the at least one cord, and wherein the control unit is further operable to identify the damage event based on the measured magnetic field of the at least one cord.

8. The monitoring system of claim 1, wherein the damage event is a break in the at least one cord.

9. The monitoring system of claim 1, wherein the damage event is a partial damage of the at least one cord.

10. A method of monitoring a moving conveyor belt in a conveyor belt system, the conveyor belt having a plurality of embedded reinforcing cords and a plurality of identification tags, the conveyor belt system having a tag reader for detecting and identifying the presence of an identification tag from among the plurality of identification tags passing by the tag reader and a belt monitoring system to detect a plurality of magnetic reference points, the method comprising:

acquiring a belt location on the moving conveyor belt from a belt map based on a magnetic reference point from among the plurality of magnetic reference points as well as a detected and identified identification tag;

scanning the cords of the conveyor belt using the belt monitoring system;

analyzing data from the scanned cords to identify a damage event of at least one cord from among the plurality of cords in the conveyor belt; and

in response to identifying the damage event, determining a location of the damage event based on the acquired belt location.

11. The method of claim 10, further comprising:

in response to identifying the damage event, determining a severity of the damage event.

12. The method of claim 11, wherein the damage event is not a critical damage event, and further comprising:

identifying whether the damage event has been previously detected; and

in response to identifying that the damage event has been previously detected, determining whether the severity of the damage event has increased.

13. The method of claim 12, further comprising:

in response to determining that the severity of the damage event has increased, storing a measure of an increase of the damage event.

14. The method of claim 12, further comprising:

in response to determining that the severity of the damage event has increased, determining whether the damage event increase has exceeded a threshold severity value for the damage event; and

in response to determining that the damage event increase exceeds the threshold;

providing an alarm;

notifying an operator of the system of recommended actions; and

notifying the operator of the location of the damage event.

15. The method of claim 14, wherein the recommended actions includes actions selected from the group consisting of inspecting the conveyor belt, performing a major repair on the conveyor belt, performing a minor repair on the conveyor belt, performing a splice on the conveyor belt, ignoring the damage event, and combinations thereof.

16. The method of claim 11, wherein the damage event is a critical damage event, the method further comprising:

providing an alarm;

stopping the conveyor belt; and

notifying an operator of system of the location of the critical damage event.

17. A method of monitoring a moving conveyor belt in a conveyor belt system, the conveyor belt having a plurality of embedded reinforcing cords and a plurality of identification tags, the conveyor belt system having a tag reader for detecting and identifying the presence of an identification tag from among the plurality of identification tags passing by the tag reader and a belt monitoring system to detect a plurality of magnetic reference points, the method comprising:

acquiring associated time and distance target values from a calibration table for a next identification tag based upon a magnetic reference point from among the plurality of magnetic reference points as well as a detected and identified identification tag;

initiating time and distance counters associated with the time and distance target values;

scanning the cords of the conveyor belt using the belt monitoring system;

analyzing data from the scanned cords to identify a damage event of at least one cord from among the plurality of cords in the conveyor belt; and

in response to identifying the damage event, determining a location of the damage event based on the time and distance target values of the magnetic reference point, the detected and identified identification tags, and the next identification tags.

18. The method of claim 17, further comprising:

in response to identifying the damage event, determining a severity of the damage event.

19. The method of claim 18, wherein the damage event is not a critical damage event, and further comprising:

identifying whether the damage event has been previously detected; and

in response to identifying that the damage event has been previously detected, determining whether the severity of the damage event has increased.

20. The method of claim 19, further comprising:

in response to determining that the severity of the damage event has increased, storing an indication of the increase of the damage event.

21. The method of claim 19, further comprising:

in response to identifying that the severity of the damage event has increased, determining whether the damage event increase has exceeded a threshold severity value for the damage event; and

in response to determining that the damage event increase exceeds the threshold;

providing an alarm;

notifying an operator of the system of recommended actions; and

notifying the operator of the location of the damage event.

22. The method of claim 21, wherein the recommended actions include actions selected from the group consisting of inspecting the conveyor belt, performing a major repair on the conveyor belt, performing a minor repair on the conveyor belt, performing a splice on the conveyor belt, ignoring the damage event, and combinations thereof.

23. The method of claim 18, wherein the damage event is a critical damage event, the method further comprising:

providing an alarm;

stopping the conveyor belt; and

notifying an operator of system of the location of the critical damage event.

24. The method of claim 17, further comprising:

generating a report providing information on the conveyor belt.

25. The method of claim 24, further comprising:

printing the report on a printer.