Device for detecting defects removed from fibrous material using optical inspection
AssigneeLe Centre De Cooperation Internationale En Recherche Agronomique Pour Le Developpement (CIRAD)
InventorGeorges Cornuejols
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Abstract
A device for detecting defects (2, 3) in fibrous materials (4, 22) includes members (16, 17) for squeezing the material against a film (1), a separating member (24) downstream of the squeezing members for separating the fibrous material from the film, and an opto-electronic sensor (6) downstream of the separating member for imaging the film and defects. An image processing assembly (26, 44) is electrically connected to the output of the imaging assembly for sensing and counting the marks left on the film by the defects. A member (25) is provided for moving the film relative to the opto-electronic sensor. Various optical systems, particularly polarizers (9, 10), may be incorporated into the device.
Claims10
Device for detecting defects from fibrous material comprising:
- a transfer film;
- means for pressing the fibrous material onto the transfer film and transferring defects onto the film;
- separating means for separating the fibrous material from the transfer film, the transfer film carrying the defects and fibers adhering to defects,
- an opto-electronic sensor producing a signal representative of defects on the transfer film in an optical field of the sensor,
- image processing means connected to the sensor for analyzing the signal issued by the sensor and for counting the defects which are represented by the signal issued by the sensor.
Device for detecting defects from fibrous material comprising:
- a transfer film;
- means for pressing the fibrous material onto the transfer film and transferring defects onto the film;
- separating means for separating the fibrous material from the transfer film, the transfer film carrying the defects and fibers adhering to defects,
- a light source fitted with a first polarizer to polarize a light emitted by the light source on the transfer film,
- an opto-electronic sensor producing a signal representative of defects on the transfer film in an optical field of the sensor,
- a second polarizer is disposed on the opto-electronic sensor and oriented to block said polarized light,
- image processing means connected to the sensor for analyzing the signal issued by the sensor and for counting the defects which are represented by the signal issued by the sensor.
Dependencies are inferred from the claim text.