Further, instead of the above-mentioned first satellite upper interval dref, the driving voltage of the oscillation element 3 can be controlled by using the liquid column constricted width w.
进一步,可利用液柱收缩宽度w而不是上述第一卫星上间隔dref控制振荡单元3的驱动电压。
Similar to the above-mentioned first satellite upper interval dref, the liquid column constricted width w sensitively changes with respect to the change in fluid droplet shape of the fluid stream S.
与上述第一卫星上间隔dref相似,液柱收缩宽度w会灵敏地随着液流S的液滴形状变化而变化。
In cases where the liquid column constricted width w is narrow, such a state represents that the liquid column is about to be cut off.
在液柱收缩宽度w较窄时,这种状态表示液柱将要中断。
Based on the value of the first satellite upper interval d or the value of the liquid column constricted width w, a fluid droplet shape of the fluid stream S can be stabilized by controlling the driving voltage of the oscillation element 3.
In cases where a value of the liquid column constricted width w becomes smaller, or zero, the liquid column is completely cut off and a new fluid droplet D is formed.
在液柱收缩宽度w的值变小或变为零时,液柱完全中断,形成一个新的液滴D。
Note that, for example, in cases where a plurality of the narrowest parts (positions where the liquid column constricted width w becomes minimum) exists in the constricted region of the fluid right before being converted into fluid droplets, an arbitrary point, for example, a central point of the constricted region or a point closest to the break-off point BP may be regarded as the narrowest part.
As shown in Fig. 6, a distance m (final fluid droplet length in the liquid column) from a position where the liquid column constricted width w becomes minimum (narrowest part of the constricted region), to the break-off point has a close relation with the liquid column length L (the position of the break-off point BP).
The first satellite upper interval d, the liquid column constricted width w, and a liquid column length L (the position of the break-off point BP) have a mutually close relation.
第一卫星上间隔d、液柱收缩宽度w和液柱长度L(断裂点BP的位置)的相互关系紧密。
The liquid column length L, the first satellite upper interval d, and the liquid column constricted width w are indexes which directly show stability of the break-off point BP.
液柱长度L、第一卫星上间隔d和液柱收缩宽度w为直接显示断裂点BP的稳定性的指标。
The reference image and the image during sorting can be compared, for example, based on a distance d from the break-off point BP to the first satellite SD1 (first satellite upper interval d), and based on a width w of the constricted region (liquid column constricted width) of the fluid right before being converted into fluid droplets.
Therefore, the fluid stream S can be maintained in a stable state, and also the position of the break-off point BP can be stabilized by keeping adjusting the liquid column constricted width w so as to match with the liquid column constricted width wref of the reference image 71.
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