Optical proximity sensors too may fail in this

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Unformatted text preview: © Festo Didactic GmbH & Co. KG • FP 1110 67 Monitoring the winding of electrical wires and cables Capacitive proximity sensors react to copper containing electrical wires or cables of relatively small diameter, whereas inductive proximity sensors react at a smaller switching distance or not at all. Optical proximity sensors too may fail in this instance. Fig. 5.4.4: Monitoring for cable breakage by means of a capacitive proximity sensor Checking the presence of bulbs inside assembled cardboard boxes A capacitive proximity sensor checks whether each box travelling past contains a light bulb. Fig. 5.4.5: Checking the presence of bulbs inside cardboard boxes (Source: Turck) 68 © Festo Didactic GmbH & Co. KG • FP 1110 5. Capacitive proximity sensors 5.5 Exercises Exercise 5.1 Measuring the filling level in a grain silo You intend to use a capacitive proximity sensor to detect the filling level in a grain silo. What do you have to remember? Exercise 5.2 Environmental effects on capacitive proximity senso...
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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.

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