MAGNETIC FLUX SENSOR QUALITY INDICATOR APPARATUS AND METHOD

• US 20170227496A1
• Filed: 08/28/2014
• Published: 08/10/2017
• Est. Priority Date: 08/28/2014
• Status: Active Grant

• Current Assignee: Compagnie générale des établissements Michelin
• Original Assignee: Bradley D. Schober, Compagnie générale des établissements Michelin, Michelin Recherche et Technique SA (Compagnie Generale DES Etablissements Michelin SCA), David Judd, Frank E. Gramling, Michael D. Petrovich
• Inventors: JUDD, David A., GRAMLING, Frank E., SCHOBER, Bradley D, PETROVICH, Michael D
• Granted Patent: US 10,168,300 B2
• Time in Patent Office: Days
• CPC Class Codes: B29D 2030/546 Measuring, detecting, monitoring, inspecting, controlling
• CPC Class Codes: B29D 30/54 Retreading
• CPC Class Codes: G01M 17/02 Tyres
• CPC Class Codes: G01N 27/82 for investigating the presence of flaws
• CPC Class Codes: G01N 27/83 by investigating stray magnetic fields

Abstract

A flux leakage detection system and a method for providing a quality indicator for a flux leakage detection system are provided.

Claims

1. A flux leakage detection system, comprising:

a ferrous metal flux quality indicator (FQI) having at least one index incorporated between two opposed extents thereof that approximates an anomaly in metallic tissue with the at least one index having a cumulative cross-sectional area to facilitate flux leakage from ferrous metal;

a sensor inspection device for detecting breaks in ferrous reinforcement elements during a tire inspection process, with the sensor inspection device having a permanent magnet to create fields of magnetic flux used in detecting breaks in ferrous reinforcements during the tire inspection process;

wherein movement of the FQI is effected such that, at the start of a test, the at least one index is disposed between one magnetic pole of the magnet and one end of a sensor array of the sensor inspection device; and

once data collection has started, movement of the FQI is effected such that the at least one index is moved relative to the sensor array at a constant speed until the index is disposed between an opposite end of the sensor array and an opposite magnetic pole of the magnet.

2. The flux leakage detection system of claim 1, wherein the sensor inspection device includes a body having an outermost inspection surface and one or more sensors selected from one or more of Hall Effect sensors, temperature sensors, optical sensors and any equivalent and complementary sensor thereof and any combination thereof.

3. The flux leakage detection system of claim 2, wherein the outermost inspection surface exhibits a profile of an arc of a circle having a predefined radius of curvature and movement of the index is effected curvilinearly relative to the sensor array during data collection.

4. The flux leakage detection system of claim 3, wherein the at least one index includes at least one of one or more notches, grooves, apertures and slots integral with a surface of the FQI proximate the sensor inspection device during data collection and the at least one index is optionally coextensive with the opposed sides of the bar and approximately equidistant between the opposed extents of the bar.

5. The flux leakage detection system of claim 4, wherein the FQI is fabricated as one of:

an essentially flat metal bar that conforms to the outermost inspection surface and has a predetermined width, a predetermined thickness and a pair of opposed sides of predetermined length coextensive with a pair of opposed extents and delineating the predetermined width; and

a single strand cable that conforms to the outermost inspection surface, the cable having a pair of opposed extents and a predetermined length along which the at least one index is disposed, wherein a holder is selectively provided that ensures repeatable parallel movement of the cable along a length of the sensor array.

6. The flux leakage detection system of claim 5, wherein the predetermined length of the bar is selected from:

a length equal to or less than a curvilinear distance between the two magnetic poles of the sensor inspection device; and

a length sufficient such that, when at least a portion of the FQI is moved between opposed ends of an array of flux sensors of the sensor inspection device, neither opposed end of the FQI leaves a magnetic pole of the sensor inspection device.

7. The flux leakage detection system of claim 6, wherein the at least one index comprises at least one of:

at least one notch of predetermined depth relative to the predetermined width and the predetermined length of the bar, and the predetermined depth is deep enough to provide a recognizable flux leakage wavelet; and

an aperture extending through the predetermined thickness of the bar and optionally equidistant from the opposed sides.

10. A method for providing a quality indicator for a flux leakage detection system, comprising:

providing a flux leakage detection system according to claim 1;

moving the FQI such that, at the start of a test, the at least one index is disposed between one magnetic pole of the magnet and one end of a sensor array of the sensor inspection device; and

once data collection has started, moving the index relative to the sensor array at a constant speed until the at least one index is disposed between an opposite end of the sensor array and an opposite magnetic pole of the magnet.

11. The method of claim 10, further comprising providing the sensor inspection device with a body having an outermost inspection surface and one or more sensors selected from one or more of Hall Effect sensors, temperature sensors, optical sensors and any equivalent and complementary sensor thereof and any combination thereof.

12. The method of claim 11, wherein the outermost inspection surface exhibits a profile of an arc of a circle having a predefined radius of curvature such that movement of the at least one index is effected curvilinearly relative to the sensor array during data collection.

13. The method of claim 12, wherein the at least one index includes at least one of one or more notches, grooves, apertures and slots integral with a surface of the FQI proximate the sensor inspection device during data collection, and the at least one index is optionally coextensive with the opposed sides of the bar and approximately equidistant between the opposed extents of the bar.

14. The method of claim 13, further comprising fabricating FQI as one of:

an essentially flat metal bar that conforms to the outermost inspection surface and has a predetermined width, a predetermined thickness and a pair of opposed sides of predetermined length coextensive with a pair of opposed extents and delineating the predetermined width; and

a single strand cable that conforms to the outermost inspection surface, the cable having a pair of opposed extents and a predetermined length along which the at least one index is disposed, wherein a holder is selectively provided that ensures repeatable parallel movement of the cable along a length of the sensor array.

15. The method of claim 14, wherein the predetermined length of the bar is selected from:

a length equal to or less than a curvilinear distance between the two magnetic poles of the sensor inspection device; and

a length sufficient such that, when at least a portion of the FQI is moved between opposed ends of an array of flux sensors of the sensor inspection device, neither opposed end of the FQI leaves a magnetic pole of the sensor inspection device.

16. The method of claim 15, wherein the at least one index comprises at least one of:

at least one notch of predetermined depth relative to the predetermined width and the predetermined length of the bar, and the predetermined depth is deep enough to provide a recognizable flux leakage wavelet; and

an aperture or slot extending through the predetermined thickness of the bar and optionally equidistant from the opposed sides.

17. The method of claim 10, further comprising providing one or more network-connected computing devices in communication with at least one of the FQI and the sensor inspection device, wherein the one or more network-connected computing devices include instructions for performing at least one of transferring data from at least one of the FQI and the sensor inspection device and controlling one or both of the FQI and the sensor inspection device either directly or indirectly.

18. The method of claim 17, further comprising providing a platform including at least one of:

a server in communication with at least one network-connected device with the server configured to perform actions comprising at least one of;

communicating over a network;

facilitating communication between the at least one network-connected device and the one or more computing devices;

building and accessing a database of stored peak-to-peak response values that can be generated for intended flux leakage integrity, wherein the stored peak-to-peak response values are representative of flux leakage integrity of previously tested sensors;

uploading test data for storage on the database; and

generating one or more representations of one or more of the peak-to-peak response values; and

an engine configured to perform at least one of;

recording test data as each sensor inspection device is tested;

recording high peaks and low peaks of each sensor as the at least one index is moved thereover;

computing peak-to-peak response values as the at least one index passes over each sensor;

comparing a peak-to-peak response value of at least one sensor with at least one other peak-to-peak response value; and

based upon the comparing, determining flux leakage integrity.

19. The flux leakage detection system of claim 1, further comprising one or more network-connected computing devices in communication with at least one of the FQI and the sensor inspection device, wherein the one or more network-connected computing devices include instructions for performing at least one of transferring data from at least one of the FQI and the sensor inspection device and controlling one or both of the FQI and the sensor inspection device either directly or indirectly.

20. The flux leakage detection system of claim 19, further comprising a platform including at least one of:

a server in communication with at least one network-connected device with the server configured to perform actions comprising at least one of;

communicating over a network;

facilitating communication between the at least one network-connected device and the one or more computing devices;

building and accessing a database of stored peak-to-peak response values that can be generated for intended flux leakage integrity, wherein the stored peak-to-peak response values are representative of flux leakage integrity of previously tested sensors;

uploading test data for storage on the database; and

generating one or more representations of one or more of the peak-to-peak response values; and

an engine configured to perform at least one of;

recording test data as each sensor inspection device is tested;

recording high peaks and low peaks of each sensor as the at least one index is moved thereover;

computing peak-to-peak response values as the at least one index passes over each sensor;

comparing a peak-to-peak response value of at least one sensor with at least one other peak-to-peak response value; and

based upon the comparing, determining flux leakage integrity.

8. (canceled)

9. (canceled)