A liquid droplet size detection device based on electric field deflection
A size detection and electric field deflection technology, which is applied in the direction of electromagnetic measuring devices, measuring devices, and electric devices, can solve the problems of inaccurate liquid droplet size detection devices and high magnification microscopes, and achieve easy operation, adjustment of process parameters, Effect of process parameters in time
Active Publication Date: 2022-08-09
SHANGHAI UNIV
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[0006] In order to solve the problem that the existing liquid droplet size detection device is inaccurate or needs a microscope with high magnification, the present invention proposes a liquid droplet size detection device based on electric field deflection
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[0024] The present invention will be further described below according to the accompanying drawings:
[0025] refer to figure 1 , the device includes laser source A 1, high-voltage plate 2, laser source B 3, substrate 4, ground plate 6, receiver A7, computer 8, receiver B9, galvanometer 10, camera 11; high-voltage plate 2 and The grounding plates 6 are all conductive, and a certain voltage is applied to the high-voltage plate 2, while the grounding plate 6 is grounded; the substrate 4 can be conductive and grounded, and a current meter 10 is connected in series on the grounding wire; the receiver A7, the receiver B9 , the galvanometer 10 and the camera 11 are monitored by the computer 8 .
[0026] Meanwhile, in this device, the laser light emitted by the laser source A1 is received by the receiver A7, and the laser light emitted by the laser source B3 is received by the receiver B9. When the droplet enters between the high voltage electrode plate 2 and the ground electrode p...
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The invention discloses a liquid droplet size detection device based on electric field deflection, which is used to solve the problems that the existing charged droplet size detection method requires a microscope with high magnification. The device establishes a uniform electric field through two parallel electrode plates, so that the charged droplets are deflected in the electric field. At the same time, a galvanometer is connected to the substrate. When the droplets are deposited on the substrate, an instantaneous current flows through the The electric current can indirectly obtain the charge of the droplet. The direction of the electric field is the horizontal direction, and only the movement state of the droplet in the horizontal direction is changed. After kinematic analysis, the distance between the moving distance of the droplet in the horizontal direction and the charge and mass can be obtained. , and calculate the size of the droplet with the help of this relation. The present invention can monitor the size of droplets in real time in the process of electric field spraying or electric field on-demand spraying, etc., which is beneficial to the timely adjustment of process parameters, and has simple structure and convenient operation.
Description
technical field [0001] The invention relates to a liquid droplet size detection device based on electric field deflection, belonging to the field of droplet shape detection. Background technique [0002] In techniques such as electric field spraying, charged droplets on the micron to nanometer scale are produced. By detecting the size of the droplets, the process parameters can be optimized in a targeted manner. The most common way to detect droplet size is to observe the deposited droplets through a microscope, or to measure them with image processing after taking pictures with a camera. Such methods are widely used, and related documents such as CN104089857B. This method has high precision and wide application range, and can be used regardless of whether the droplet is charged or not, but requires a high-magnification microscope or a high-speed camera. For some droplets of nanometer size, scanning electron microscopy may be required, which places high demands on detecti...
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IPC IPC(8): G01N15/02G01B7/12
CPCG01N15/02G01B7/125
Inventor 钟宋义鲁耀辉蒲华燕孙钰杨扬辛立明段超群刘富樯刘志杰孟献兵
Owner SHANGHAI UNIV