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Unformatted text preview: nd response travel of various cylinders (example) © Festo Didactic GmbH & Co. KG • FP 1110 47 3. Magnetic proximity sensors Permanent magnet (1) Sensor off (4) Hysteresis (H) Cylinder barrel (2) Centre of sensor (5) Response range (S) Sensor on (3) Fig. 3.4.1: Schematic representation of hysteresis and response travel of a magnetic proximity sensors Exercise 3.2 Electrical connection of a reed proximity sensor
Describe the behaviour of a reed sensor as shown in Fig. 3.1.2, with the supply
voltage being reversed, i.e. polarity reversal of the proximity sensor.
Can this damage the reed sensor? Exercise 3.3 Resolution of a reed proximity sensor
What is the smallest possible cylinder stroke that can be detected by two reed
Use the technical data in table 3.2.1 and 3.4.1 for your answer. 48 © Festo Didactic GmbH & Co. KG • FP 1110 4. Inductive proximity sensors 4.1
Function description The most important components of an inductive proximity sensor are an oscillator
(LC resonant circuit), a demodulator rectifier, a bistable amplifier...
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- Spring '12