| 摘要 |
PCT No. PCT/EP96/02975 Sec. 371 Date Apr. 13, 1998 Sec. 102(e) Date Apr. 13, 1998 PCT Filed Jul. 5, 1996 PCT Pub. No. WO97/03012 PCT Pub. Date Jan. 30, 1997An optoelectronic sensor device (S) for detecting a yarn passing through a scanning zone (3) comprises at least one light source (L, L'), at least one photoelectric receiver (R1, R2) which is responsive to light variations and which is connected to an evaluation circuit (C), and a slit aperture (A1, A1) arranged between the yarn and the receiver. In a weft-yarn measuring and storing device (F), the sensor device (S) forms a withdrawal sensor for the yarn which is withdrawn overhead from the storage body (B). According to the invention at least two receivers that are closely adjacent to each other are oriented towards the scanning zone, with the receiving surfaces (4, 5) of the receivers being each covered by an upstream slit aperture (A1, A2), except for a limited area. The slit apertures (A1, A2) are arranged relative to one another at an acute angle of not more than 90 DEG .
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