Unformatted text preview: evices take up too much room. Another application, where the use of fibre-optic
cable adaptors is of advantage, is in areas with explosion hazard. With the use of
fibre-optic cables the position of small objects can be detected with high accuracy. Fig. 6.5.1: Through-beam sensor with fibre-optic cables (principle) By using two separate fibre-optic cables it is possible to construct a through-beam
sensor. Because of their handling flexibility, these can be used universally. Fig. 6.5.2: Diffuse sensor with fibre-optic cables (principle) Emitter and receiver fibre-optic cables are incorporated in sensor head. 92 © Festo Didactic GmbH & Co. KG • FP 1110 6. Optical proximity sensors 6.5.2 Technical characteristics 2 1 4 3 Emitter (1) Reception range (3) Receiver (2) 5 Emission range (5) Response range (4) Fig. 6.5.3: Response range of through-beam sensors with fibre-optic cables The response range is accurately determined by the aperture of the fibre-optic cable
ends. This makes possible an accurate lateral approach, even with small objec...
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- Spring '12
- pH, proximity sensors, Festo Didactic GmbH, Festo Didactic GmbH & Co