Unformatted text preview: sharp knife.
• Cost saving. Advantages of glass
fibre-optic cables • Suitable for higher temperatures.
• Reduced optical attenuation with large distances as well as at close infrared
• Longer lasting. 94 © Festo Didactic GmbH & Co. KG • FP 1110 6. Optical proximity sensors If emitter/receiver units with separate housing (as with through-beam sensors) are
used, it should be noted that if several sensors are similarly orientated, mutual
interference can occur. E1 b) E2 R2 E1 a) R1 R1 R2 E2 a) Problem: Mutual interference of emitter and receiver
b) Solution: Alternate arrangement of emitter and receiver Fig. 6.5.6: Avoiding mutual interference © Festo Didactic GmbH & Co. KG • FP 1110 95 6. Optical proximity sensors Although optical proximity sensors are to a certain extent protected against external
light influences, excessive external light (e.g. filming lights, flash lights, strong
sunlight) can cause interference. Problem: Interference from extraneous ligh...
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- Spring '12
- pH, proximity sensors, Festo Didactic GmbH, Festo Didactic GmbH & Co