Figure 3 | Scientific Reports

Figure 3

From: Image-based closed-loop feedback for highly mono-dispersed microdroplet production

Figure 3

(a) Normalised droplet volumes over a 50 minute timescale created using constant flow rate, stepper motor driven syringe pumps (dark red), pulseless syringe pumps (light red), constant pressure pumps (dark green) and image-based feedback driving a pressure pump, producing droplets at 50 Hz (light green). The improvement in monodispersity of the pressure based systems and the drift cancelling effect of the feedback can be clearly seen. (b) Detailed view of the changes at short timescales, showing the oscillations due to the syringe pump and drift due to the constant pressure pump. c) Normalised histograms of the normalised droplet volume for each of the methods shown.

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