Systems and methods for assuring and improving process quality

Patent metadata

Field	Value
Publication number	US-10372117-B2
Application number	US-201314905105-A
Country	US
Kind code	B2
Filing date	Jul 18, 2013
Priority date	Jul 18, 2013
Publication date	Aug 6, 2019
Grant date	Aug 6, 2019

Abstract

A system for evaluating at least one state of a process is provided the system having means for segmenting the process into a plurality of process segments, one or more sensors configured to capture information related to each process segment of the plurality of process segments generated by the segmenting means, the information comprising a plurality of samples, and processing means configured to process the plurality of samples related to each process segment of the plurality of segments, and, based on the processing, provide an indication associated with the at least one state of the process.

First claim

The invention claimed is:

1. A method for evaluating at least one state of an assembly process of a work piece, comprising:
segmenting the assembly process on a spatial basis into a plurality of process segments;
capturing information related to each process segment of the plurality of process segments, the information comprising a plurality of samples captured during the assembly process at a predetermined temporal frequency;
processing the plurality of samples related to each segment of the plurality of process segments such that numerical data associated with each sample is generated;
performing a statistical analysis on the numerical data to generate a plurality of process values wherein each process value is associated with one of the samples;
determining whether the process values exceed a threshold value;
determining one or more physical defects in the work piece as a result of the assembly process when one or more process values exceeds a threshold value; and
in response to a determination that one or more of the plurality of process values exceeds the threshold, labelling the work piece for disposal as having failed the assembly process, based on the one or more physical defects determined.

2. The method according to claim 1 , further comprising sub-segmenting each of the plurality of process segments into a plurality of sub-segments.

3. The method according to claim 1 , further comprising, specifying a set of parameters defining at least one of the plurality of segments, the samples, and the process.

4. The method according to claim 1 , wherein the processing comprises applying one or more algorithms to the plurality of samples to result in data points.

5. The method according to claim 4 , wherein the one or more algorithms are selected from at least one of a maximum determining algorithm, a minimum determining algorithm, an average determining algorithm, a slope determining algorithm, an integral algorithm, a summing algorithm, logic actions, masking functions, local thresholding, global thresholding, adaptive thresholding, inversing the image, filling parts of the image, opening parts of the image, and noise spot removal.

6. The method according to claim 1 , wherein a number of segments comprising the plurality of segments is configured based on the process being analyzed.

7. The method according to claim 1 , further comprising a user configuration step, wherein a user may configure at least one of the number of segments and a statistical state associated with a physical defect.

8. The method according to claim 1 , wherein the process includes at least one of assembly process, a composite curing process, a composite consolidating process, a powder cladding process, a powder spray process, a spray process, a brazing process, a composite tape laying process, a composite comingled fibre placement process, a heating and drying process.

9. The method according to claim 1 , wherein the process is a welding process.

10. A system for evaluating at least one state of an assembly process of a work piece, the system comprising:
a processor configured to segment the assembly process on a spatial basis into a plurality of process segments;
one or more sensors configured to capture information related to each process segment of the plurality of process segments generated by the processor, the information comprising a plurality of samples captured during the assembly process at a predetermined temporal frequency;
wherein the processor is further configured to:
process the plurality of samples related to each process segment of the plurality of segments such that numerical data associated with each sample is generated,
perform a statistical analysis on the numerical data to generate a plurality of process values wherein each process value is associated with one of the samples,
determine whether the process values exceed a threshold value;
determining one or more physical defects in the work piece as a result of the assembly process when one or more process values exceeds a threshold value; and
in response to a determination that one or more of the plurality of process values exceeds the threshold, label the work piece for disposal as having failed the assembly process, based on the one or more physical defects determined.

11. The system according claim 10 , wherein output associated with the processing of each sample of the plurality of samples comprises a single numeric value.

12. The system according to claim 11 , wherein an output associated with the processing of each segment of the plurality of process segments is a function of the single numeric value.

13. The system according to claim 10 , further comprising a database comprising anomaly data associated with one or more predetermined anomalies.

14. The system according to claim 10 , wherein the one or more sensors comprises a camera and/or a microphone configured to capture radiation data.

15. The system according to claim 10 , wherein the plurality of samples comprise at least one of an image and a sound.

16. The system according to claim 10 , further comprising a band pass filter configured to selectively transmit radiation data within a predetermined wavelength or group of wavelengths and to prevent transmission of radiation data outside of the predetermined wavelength.

17. The system according to claim 10 , further comprising a user interface, the user interface being configured to enable customization of a set of parameters defining at least one of the plurality of segments, the samples, and the process.

18. The system according to claim 10 , wherein the one or more sensors is configured to capture images in three-dimensions.

19. The system according to claim 13 , wherein the database further comprises comparative data related to the plurality of samples based on one or more algorithms.

20. The system according to claim 10 , further comprising a storage device configured to store one or more of the plurality of samples captured during the process, and for outputting one or more of the plurality of samples in a format visible and/or audible to a human user.

21. A system for evaluating at least one state of an assembly process of a work piece, the system comprising:
a processor configured to segment the assembly process on a spatial basis into a plurality of process segments;
one or more sensors configured to capture information related to each process segment of the plurality of process segments generated by the processor, the information comprising a plurality of samples captured during the assembly process at a predetermined temporal frequency, wherein a trigger between process start/stop and data capture start/stop initiates and synchronizes a position of the work piece and said process segments;
wherein the processor is further configured to:
process the plurality of samples related to each process segment of the plurality of segments such that numerical data associated with each sample is generated,
perform a statistical analysis on the numerical data to generate a plurality of process values wherein each process value is associated with one of the samples,
determine whether the process values exceed a threshold value;
determining one or more physical defects in the work piece as a result of the assembly process when one or more process values exceeds a threshold value; and
in response to a determination that one or more of the plurality of process values exceeds the threshold, label the work piece for disposal as ha

Assignees

• Toyota Motor Europe Nv/Sa
• Toyota Motor Co Ltd

Inventors

• Willett Andrew
• Okazaki Tomoya
• Iwatani Shingo

Classifications

• G05B19/41875 Primary

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• G05B2219/32179

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• G06T7/0004

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