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The development of an interlock and control system for a clinical proton therapy system
Author(s)
Fulcher, T.J.
Date Issued
1995
Type
Thesis
Publisher
Cape Technikon
Abstract
The development of a 200 MeV clinical proton therapy facility at the
National Accelerator Centre required an interlock and control system to
supervise the delivery of radiation to a patient.
The interlock and control system is responsible for ensunng that nobody
enters the treatment vault during an irradiation, the extraction of the beamstop
devices 'from the beam-line to allow the irradiation of the patient and
the insertion of those beam-stop devices when an error condition is detected.
Because of its nature, the interlock and control system should be designed so
that in the event of an error condition being detected, it should fail to a safe
state. This is achieved by modelling the interlock and control system with
an appropriate modeling method.
This thesis describes a graphical modelling method called Petri-nets, which
was used to model the system, and the software developed from the model.
National Accelerator Centre required an interlock and control system to
supervise the delivery of radiation to a patient.
The interlock and control system is responsible for ensunng that nobody
enters the treatment vault during an irradiation, the extraction of the beamstop
devices 'from the beam-line to allow the irradiation of the patient and
the insertion of those beam-stop devices when an error condition is detected.
Because of its nature, the interlock and control system should be designed so
that in the event of an error condition being detected, it should fail to a safe
state. This is achieved by modelling the interlock and control system with
an appropriate modeling method.
This thesis describes a graphical modelling method called Petri-nets, which
was used to model the system, and the software developed from the model.
Additional information
Thesis (Masters Diploma (Technology))--Cape Technikon, Cape Town, 1995
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