自动粘度计测量时间原理-液体液面光电传感

Optoelectronic sensing of the liquid meniscus液体液面光电传感

The near-infraredlight which is generated in LEDs locatedin the upper section of the measurement stａnd is conductedthrough a glass-fibre light-conductor cableonto the measurement planes. Thelight shines through theviscometer before it arrives at another light-conductor cable locatedon the opposite side; insidethis second cable,the light is conductedto a receiver inthe uppersection of the measurement stand.

While the liquid meniscus passes through the measurement planes, the lens -likeeffect of the meniscuscauses a short-term darkening of the light beam, followed by amagnification. Thisprocess generates a measurement signal which can be evaluatedaccurately.

自动粘度计测量时间原理-液体液面光电传感

测量位的上部的LED所产生的近红外光通过玻璃纤维光导电缆进行到测量平面。通过粘度计的光线照射之前它到达位于相反侧的另一轻型芯电缆;此**电缆内时，光被在测量台的上面部分传导到一个接收器。

而液体弯月面通过测量平面中，透镜式的弯月面的作用下会导致光束瞬时变暗，接着就变大。这个过程产生能够**地进行评估的测量信号。