Fig. 1. Schematic diagram of experiment system

Fig. 2. Schematic diagram of cell detection device. (a) Binarized fluorescence signal; (b) fluorescence signal of algal cell;(c) detection process of algal cell fluorescence

Fig. 3. Schematic diagram of Injection segment control

Fig. 4. Fluorescence signal of single cell

Fig. 5. Probability distribution of particle velocity passing through a section in unit time

Fig. 6. Velocity distribution of algae cells under different volumetric flow rates and fitted curve.(a) 10 μL/min; (b) 20 μL/min; (c) 30 μL/min; (d) 40 μL/min

Fig. 7. Automatic acquisition of algae cell images at different flow rates and microscopy results. (a) 0.24 μL/min;(b) 1.50 μL/min; (c) 6.00 μL/min; (d) images obtained through microscope