Magnetic flux sensor quality indicator apparatus and method

Patent metadata

Field	Value
Publication number	US-10168300-B2
Application number	US-201415324917-A
Country	US
Kind code	B2
Filing date	Aug 28, 2014
Priority date	Aug 28, 2014
Publication date	Jan 1, 2019
Grant date	Jan 1, 2019

Abstract

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

First claim

What is claimed is:

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 the sensor inspection device having a sensor array having a plurality of sensors spaced from one another along a path, wherein the sensor inspection device having a curved sensor inspection surface that engages the FQI during data collection, wherein the sensors of the sensor array are located between the permanent magnet and the sensor inspection surface;
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 the 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 along a curvilinear path past the sensors of the sensor array one after another 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 the inspection surface that is an outermost surface of the body and the sensors selected from the group consisting of one or more Hall Effect sensors, temperature sensors, optical sensors and combinations 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.

8. 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 along a curvilinear path past the sensors of the sensor array one after another until the at least one index is disposed between an opposite end of the sensor array and an opposite magnetic pole of the magnet.

9. The method of claim 8 , further comprising providing the sensor inspection device with a body having the inspection surface that is an outermost surface of the body and the sensors selected from the group consisting of one or more Hall Effect sensors, temperature sensors, optical sensors and combinations thereof.

10. The method of claim 9 , 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.

11. The method of claim 10 , 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.

12. The method of claim 11 , 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.

13. The method of claim 12 , 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 the array of flux sensors of the sensor inspection device, neither opposed end of the FQI leaves a magnetic pole of the sensor inspection device.

14. The method of claim 13 , 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.

15. The method of claim 8 , 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 co

Assignees

• Michelin & Cie
• Michelin Rech Tech
• Judd David
• Gramling Frank E
• Schober Bradley D
• Petrovich Michael D

Inventors

• Judd David
• Gramling Frank E
• Schober Bradley D
• Petrovich Michael D

Classifications

• G01N27/82 Primary

  for investigating the presence of flaws · CPC title

• G01N27/83 Primary

  by investigating stray magnetic fields · CPC title

• B29D2030/546

  Measuring, detecting, monitoring, inspecting, controlling · CPC title

• G01M17/02

  Tyres · CPC title

• B29D30/54

  Retreading · CPC title