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1. WO2019106509 - PROCÉDÉS ET SYSTÈMES D'INSPECTION DÉCLENCHÉE DE TISSU SUR MÉTIER

Note: Texte fondé sur des processus automatiques de reconnaissance optique de caractères. Seule la version PDF a une valeur juridique

[ EN ]

CLAIMS

1. An on-loom fabric inspection system (500) comprising:

at least one imaging device (522) configured to collect images of at least one section of a weaving area (518) of a loom (502);

at least one image-capture trigger-mechanism (529) operable to trigger said imaging device

(522) to capture an image at a required instant during the weaving cycle; and

at least one image processor (524) configured and operable to receive data from said imaging device (522) and further to detect irregularities in said data.

2. The on-loom fabric inspection system of claim 1 wherein said image-capture trigger- mechanism (529) comprises at least one heald-detector (528) configured and operable to detect relative positions of at least two heald frames (508A, 508B) of said loom (502).

3. The on-loom fabric inspection system of claim 2 wherein said heald-detector (528) comprises at least one sensor selected from the group consisting of: mechanical sensors, electrical sensors, optical sensors and combinations thereof.

4. The on-loom fabric inspection system of claim 1 wherein said image-capture trigger- mechanism (529) comprises at least one timer (527) operable to synchronize image capture with said weaving cycle.

5. The on-loom fabric inspection system of claim 4 wherein said timer (527) comprises a

stroboscope timed to expose the weaving area at the required instant in the weaving cycle. 6. The on-loom fabric inspection system of claim 1 wherein said image-capture trigger- mechanism (529) comprises at least one receiver (523) operable to receive output signals from the loom (502).

7. The on-loom fabric inspection system of claim 1 wherein said required instant coincides with the moment that at least two heald frames (508A, 508B) are aligned.

8. The on-loom fabric inspection system of claim 1 wherein said required instant coincides with the moment that the shed (112) is open.

9. The on-loom fabric inspection system of claim 1 wherein said imaging device (522)

comprises a camera having an object distance equal to the optical distance from said camera to a plane of a fell region (514) of said weaving area (518).

10. The on-loom fabric inspection system of claim 1 wherein said imaging device (612) comprises a camera having an object distance equal to the optical distance from said camera to an upper warp yarn (602A) plane of a shed region (604) of said weaving area (614).

11. The on-loom fabric inspection system of claim 1 wherein said section of the weaving area (518) comprises all of a shed region (512), a woven fabric region (516) and a fell region (514).

12. The on-loom fabric inspection system of claim 1 further comprising an output mechanism (526) operable to provide information to a user regarding functioning of the loom (502).

13. The on-loom fabric inspection system of claim 1 further comprising an output mechanism (526) operable to provide information selected from a group consisting of images, graphical representations, numbers or text pertaining to functioning of the loom (502).

14. A method for inspecting woven fabric comprising:

providing at least an on-loom fabric inspection system (500) including:

at least one imaging device (522) configured to collect images of at least one section of a weaving area (518) of a loom;

at least one image-capture trigger-mechanism (529); and

at least one image processor (524);

selecting a required instant during the weaving cycle;

said at least one image-capture trigger-mechanism (529) triggering said imaging device (522) at said required instant during the weaving cycle;

said at least one imaging device (522) capturing an image of at least one section of a weaving area (518) at said required instant;

transferring image data to said at least one image processor (524); and

said at least one image processor (524) analyzing said image data for irregularities indicative of weaving faults.

15. The method of claim 14 further providing a quality index for a batch of woven fabric (520).

16. The method of claim 14 further comprising adjusting said loom (502) to correct said weaving faults.

17. The method of claim 14 further comparing deviation of weft-spacing in the fell region (514) from a desired weft-spacing function.

18. The method of claim 14 wherein said image-capture trigger-mechanism (529) comprises at least one heald-detector (528) and the method further comprises said heald-detector (528) detecting that at least two heald frames (508A, 508B) are aligned.

19. The method of claim 14 wherein said image-capture trigger-mechanism (529) comprises at least one heald-detector (528) and the method further comprises said heald-detector (528) detecting that at least two heald frames (508A, 508B) are separate indicating that the shed region (512) is open.

20. The method of claim 14 wherein said required instant coincides with the moment that at least two heald frames (508A, 508B) are aligned.

21. The method of claim 14 wherein said required instant coincides with the moment that the shed region (512) is open.