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Unformatted text preview: rrier sensors
The components to be detected have a width of 90 mm. From the characteristic
curve of a Festo through-beam sensor SFL-100 can be seen that a signal pressure of
0.7 mbar is reached by applying a sender pressure of 20 kPa (0.2 bar) at a distance
of 100 mm and 5 mm either side of the object). If the supply pressure is increased to
50 kPa (0.5 bar), a signal pressure of nearly 0.3 kPa (3 mbar) is attained under
otherwise identical conditions. This output signal can be amplified with the help of
suitable pressure amplifiers. An air barrier is suitable for detection of the parts. © Festo Didactic GmbH & Co. KG • FP 1110 267 16. Solutions 1.0 pE1 pE3 pE2 kPa
0.5 Signal pressure x 0.1 0.05 Receiver Emitter 2 pE
1 1 s x
0 20 40 60 80 100 120 mm 160 Distance s
pR = 10 kPa = const. pE1 = 10 kPa pE2 = 20 kPa pE3 = 50 kPa Fig. 16.7.1: Characteristic curves of the Festo SFL-100 air barrier 268 © Festo Didactic GmbH & Co. KG • FP 1110 16. Solutions Checking lids by means of a reflex sensor
The characteristic curve of a reflex sensor specifies values which...
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- Spring '12