Optoelectric sensor and weft yarn measurement and feeding equipment

In a weft-yarn measuring and storing device comprising a generally cylindrical storage body having a weft yarn thereon, and an optoelectronic sensor device which is associated with said storage body as a withdrawal sensor for the weft yarn which said weft yarn is withdrawable in a revolving manner from said storage body, said sensor device comprising at least two optoelectronic receivers which are arranged one after the other in the axial direction of said storage body, at least one light source for illuminating a scanning zone proximate said storage body, and an electronic evaluation circuit for generating a signal on the basis of light variations occurring at said receivers during each passage of said weft yarn through said scanning zone with a movement essentially perpendicular to a longitudinal direction of said weft yarn, comprising the improvement wherein a slit aperture is provided in front of each of said receivers between said scanning zone and said receivers, said slit apertures being disposed essentially in a common plane and one of said slit apertures being arranged relative to the other of said slit apertures such that an angle of 90.degree. or less is formed between said slit apertures.

In a weft-yarn measuring and storing device comprising a storage body having a weft yarn thereon, and an optoelectronic sensor device for detecting movement of said weft yarn in a transverse direction that is oriented transverse to a longitudinal direction of said weft yarn, said optoelectronic sensor device comprising at least one light source which illuminates a scanning zone disposed proximate said storage body, at least two optoelectronics receivers which each include a receiving surface oriented towards said scanning zone, and an evaluation circuit connected to said receivers for detecting light variations occurring at said receivers during passage of said weft yarn through said scanning zone in said transverse direction, comprising the improvement wherein each of said receivers includes a slit aperture disposed between said receiver and said scanning zone such that said receivers detect light variations in said scanning zone through said slit apertures, each of said slit apertures being elongated to define a longitudinal axis, said slit apertures being oriented transverse relative to each other such that said longitudinal axes of said slit apertures define an angle of 90 degrees or less therebetween.