Hardware Reference
In-Depth Information
a
Position 2
x
1
3
Position 1
Camera
2
4
y
b
Camera
x
Initial position of droplet 1
Initial position of droplet 3
1
3
2
4
y
Initial position of droplet 2
Initial position of droplet 4
c
Position at x-axis
Droplet 1
4
Droplet 2
3
2
1
Time
(s)
123456789 0 1 2 3 4
15
Fig. 5.11
(
a
) Droplets 1 and 2 are invisible from side view if the camera is fixed at Position 1.
Droplets 2 and 3 are invisible from side view if the camera is fixed at Position 2; (
b
) set different
initial positions for droplets 3 and 4; (
c
) the movements of droplets 1 and 2 in the x direction
To solve this problem, we can set different initial positions for droplets 1 and
2, as shown in Fig.
5.11
b. When projecting the movements of droplets 1 and 2 on
the x-axis, the relationship between time and the positions of these two droplets is
showninFig.
5.11
c. At each time moment, the positions of droplets 1 and 2 do not
overlap each other, so both of these droplets can be photographed by the camera.
By projecting the movements of droplets onto the x or y axis, the maximum
number of droplets that can be observed from the side view can be further calculated.
