G presses automatic metal cutting and shaping tools

Info iconThis preview shows page 1. Sign up to view the full content.

View Full Document Right Arrow Icon
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: ith reflecting surfaces. Devices with sensing ranges of up to 500 mm are available. Luminescent sensors can also be used in conjunction with fibre optic cables. 246 © Festo Didactic GmbH & Co. KG • FP 1110 15. Special designs and variants of proximity sensors 15.2.7 Angled light barrier sensors An angled light barrier sensor is a through-beam sensor with an angled light emission. The optical emitter and receiver are focussed on a common point. If an object appears at this focal point, the receiver detects the light reflected by the object and generates a switching signal. Angled light barrier sensors are used for the accurate detection of objects at smaller distances whereby in contrast to retro-reflective sensors the switching distance is independent of the degree of reflection. 2 3 1 Emitter (1) Receiver (2) Object (3) Fig. 15.2.5: Angled light barrier sensor © Festo Didactic GmbH & Co. KG • FP 1110 247 15. Special designs and variants of proximity sensors 15.2.8 Sensors for accident preve...
View Full Document

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.

Ask a homework question - tutors are online