| CPC G01V 8/12 (2013.01) [E03C 1/057 (2013.01); G05B 19/4155 (2013.01); G05B 2219/37371 (2013.01)] | 19 Claims |

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1. A control system comprising:
an emitter configured to emit a series of pulses of electromagnetic radiation;
a detector configured to detect, as a series of detection events, electromagnetic radiation pulses reflected by an object on which the emitted pulses of electromagnetic radiation are incident; and
a microprocessor configured to:
receive signals corresponding to each detection event from the detector,
analyse a series of samples of the signals received from the detector, each sample corresponding to a plurality of successive detection events, and
subsequently to generate one or more signals to control operation of a
fluid delivery device based on the results of the analysis,
wherein the microprocessor is configured to generate a signal to initiate operation of the fluid delivery device when the analysis of a first sample matches a pre-determined pattern or any one of a plurality of pre-determined patterns and the analysis of a second sample matches a pre-determined pattern or any one of a plurality of pre-determined patterns.
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