Abstract
A laboratory demonstration system has been made which enables a signal carried by an optical fibre to control the operation of either a pneumatic actuator or a fluidic flow control valve. Apart from the actuator, all functions are implemented by no-moving-part fluidic amplifiers. Notably this includes the direct fluidic detection of the signal which is done using a commercially available sub-unit originally developed in the USA for defence applications. The system demonstrates the integration of signal-fluidics and power fluidics and shows how remote control can be implemented without the use of electrical signalling or power at the site of the actuator. Signals are produced by a laser diode. Control functions are the operation of a standard 100 mm bore butterfly valve or the 4-to-1 modulation or diversion of airflow by a switched vortex valve.
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