Free zone the area surrounding the proximity sensor

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Unformatted text preview: oximity sensors 13.1 General terms Active surface The surface which emits the electrical field and on which a contactless proximity sensor reacts to an approaching object. Constant light operation The light beam is not modulated and is evaluated only in respect of the intensity of constant light. Diffuse sensor An optical proximity sensor whose light is scattered by the surface of an object (diffusion). Diffusion Diffuse reflection of light from the surface of an object. Directed reflection Directed reflection of light emission by means of reflecting surfaces. Fibre-optic cables Material, through which light can be conducted other than in a straight line and with minimum losses. Flush fitting proximity sensors The proximity sensor can be surrounded by metal or other materials up to the point of its active surface, without the characteristic values of the sensor being affected. Free zone The area surrounding the proximity sensor, which must be kept free of materials affecting the characteristic values of the proximity sensor. Inductive proximity sensors A device which creates a high frequency electro-magnetic field by means of an LC resonant circuit and emits a signal at the output in the event of certain attenuating conditions being fulfilled. IR-Light Infrared light is an invisible light form which has a greater wavelength than visible...
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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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