Apparatus in a spinning room preparation, ginning or the like installation for detection of foreign matter in fibre material

Abstract

Apparatus in a spinning room preparation, ginning or the like installation for detection of foreign matter in fibre material, especially cotton, comprises a presentation channel 16 through which fibre material is pneumatically conveyed. Associated with the channel is a detector 711for foreign matter, preferably comprising a camera 9, which receives reflected ultraviolet light originating from source 12 and polarised light that has been transmitted through the channel from source 11. Neither the UV nor polarised light normally registers with camera 9. When the ultraviolet light contacts certain contaminants (e.g. dense plastics packaging straps) in the channel it may be converted by fluorescence into light visible to the camera 9. Also when the polarised light is passed through certain contaminants (e.g. polypropylene or polyethylene) its polarisation may be changed such that it becomes visible to the camera 9. Both types of light are preferably simultaneously registered by the camera. Contaminants having a similar colour to the bulk fibre may thus be detected. A further colour sensitive camera set-up 71may also be provided to detect contamnants having a colour different to that of the bulk fibre. The camera systems may be used to trigger a device to eject detected contaminants.

Description

technical field [0001] The invention relates to a device for detecting foreign objects in or between fiber materials, in particular cotton, in installations for spinning room preparation, ginning, etc., said device having a revealing channel, at least two detectors arranged in succession A device (sensor arrangement) is arranged to be applied to said revelation channel for detecting foreign bodies, and the apparatus has pneumatic conveying means for passing the fibrous material through the revelation channel, wherein the first detector device (sensor arrangement) comprises at least An electronic camera with a color sensor system, but also with a further detector arrangement (sensor arrangement) operating in the ultraviolet range. Background technique [0002] In spinning room preparation systems and ginning devices it is important to remove foreign fibers or other foreign bodies from the cotton, especially when they have another color than the cotton. A further problem affe...

AI Technical Summary

Problems solved by technology

A further problem affecting the operation of optically functional foreign fiber and foreign matter separators in spinning room preparation machines and gins for cotton or synthetic fibers is that due to the acrylic wrapping film or wrapping fiber), their low optical contrast cannot be detected sufficiently or not at all

Basic components such as cameras, examination chambers, evaluation components etc. are required in each case for each intermediate module, which takes up additional installation space and entails very high additional costs for the equipment

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