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Cerberus: a laser interlock system using Arcnet

Cerberus: a laser interlock system using Arcnet

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High-power laser installations require complex and flexible safety interlock systems, frequently having to work in an environment with high levels of EMI. Traditionally, relays and timers have been employed to provide the interlock logic but this puts restraints on the level of sophistication that can be reasonably achieved. It was decided, therefore, to base the system on distributed microprocessors controlled by a PC and linked by a local area network.

References

    1. 1)
      • Key, M.H.: `Lasers–from terawatts to femtoseconds', Report of the Science & Engineering Research Council, 1988–1989.
    2. 2)
      • : `Sprite interlock system specification', Sprite/I NT/SPEC/11/91, RAL Internal Report, .
    3. 3)
      • BS7192 was withdrawn on the 1st March 92 and replaced with BS EN60825. However, BS7192 remains applicable to laser products in use on that date for a further 5 years..
    4. 4)
      • D. Hughes . , Notes on protection against laser radiation in the laboratory.
    5. 5)
      • Arcnet is a trademark of the Datapoint Corporation..
    6. 6)
      • , Arcnet factory LAN primer.
    7. 7)
      • A.M. Murphy . Token-passing protocol boosts throughput in local networks. Electronics
    8. 8)
      • S. Austin , G.I. Parkin . (1993) , Formal methods: a survey.
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