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Unformatted text preview: nks manufacturer would like to use a proximity sensor to detect automatically
which empty bottles returns are fitted with light metal screw caps. The bottles are to
pass below a proximity sensor on a conveyor belt (see illustration). Because of the
variation in bottle height and the different screw caps fitted a maximum tolerance in
height H of 8 mm should be calculated.
1. Which solution of optical proximity sensors is to be recommended?
2. Is it also possible to use inductive proximity sensors (e.g. proximity sensors with
a nominal switching distance of 8 mm)? Fig. 6.6.5: Separating bottles with or without sealing caps 106 © Festo Didactic GmbH & Co. KG • FP 1110 7. Ultrasonic proximity sensors 7.1
Function description The operational principle of an ultrasonic proximity sensor is based on the emission
and reflection of acoustic waves between an object and a receiver. Normally, the
carrier of these sound waves is air. The travelling time of the sound is measured and
evaluated. 6 Osc...
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This note was uploaded on 11/01/2012 for the course CHEMICAL 102 taught by Professor Jamesrodriguez during the Spring '12 term at Universidad Politécnica de Cartagena.
- Spring '12