Speed measurement of ink droplet by using edge detection techniques

Kwon, Kye‐Si

doi:10.1016/j.measurement.2008.03.016

Cited by 42 publications

(36 citation statements)

References 4 publications

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For further researching on electrostatic droplet speed camera [5][6][7]. For further researching on the electrostatic ejection, much detection methods have been studied.

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confidence: 99%

“…2, the capillary-type needle high frequency jetting, uniformity of droplet size, on-demand apparatus and detection device were constructed to observe and drawing, low energy cost and reduced resource dissipation, are analyze weak signals of ejecting. capable to meet the requirements of various complex To eject fine droplet, a stainless-steel capillary-type needle applications [1][2][3][4][5][6].with an inner diameter of 60 µm was used. The needle was fed However, the mechanism of liquid ejection in electrostatic driving is not fully understood.…”

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confidence: 99%

“…The needle was fed However, the mechanism of liquid ejection in electrostatic driving is not fully understood. The droplet ejection process is affected by a wide range of parameters, but it is too difficult to insure which one controls the properties of the droplets [1][2][3][4][5].To increase the efficiency in electrostatic droplet ejection processes, the time that spent on parameter adjustment for generating well calibrated and consistent performance droplets must be reduced [5]. These are the major hurdles in the development of practical applications for intelligent ejection system.…”

mentioning

confidence: 99%

mentioning

confidence: 99%

“…To increase the efficiency in electrostatic droplet ejection processes, the time that spent on parameter adjustment for generating well calibrated and consistent performance droplets must be reduced [5]. These are the major hurdles in the development of practical applications for intelligent ejection system.…”

mentioning

confidence: 99%

See 4 more Smart Citations

Weak Current Detection Technique for Electrostatic Droplet Ejection

Huang

Wang

Dai

et al. 2009

2009 International Workshop on Intelligent Systems and Applications

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For further researching on electrostatic droplet speed camera [5][6][7]. For further researching on the electrostatic ejection, much detection methods have been studied. As the most droplet ejection and knowing more about the influence of direct and efficient approach, detection technique for weak parameters, observation and analysis of the electric signals in current (level of nA) of the jetting is present in this paper. To the ejection process are needed. As the most direct and efficient observe and analyze the signals of electric current, detection approach, detection for the weak current signals of the ejection system has been constructed. The parameters such as ejection is carried out [7]. The technique for measuring weak signals frequency, ejection consistency can be investigated. By measuring has been applied, data acquisition system was constructed to the signal waveform, we can obtain that the appearance of a peak obtain and analyze the processed current signals [8,9]. The pulse indicates a droplet ejected to the counter electrode, and in results indicate the feasibility of the detection technique. the experimental condition of this work the asymmetric frequency of jetting ranged from few tens to around one thousand hertz. According to the results, this detection technique II. PROCESS OF ELECTROSTATIC DROPLET EJECTION have proved to be feasible and valid for further researching on In this work, electrostatic droplet ejection was performed in the electrostatic droplet ejection event and knowing more about the cone-jet mode by applying a constant flow rate at constant the influence of various experimental parameters. Meanwhile, voltage [1]. That is, in the electric field caused by the voltage, this detection method has a great potential as a technical electric charge is induced on the surface of the liquid meniscus condition of intelligent control of electrostatic droplet ejection. and an electric stress stretches the meniscus in the direction of Keywords-detection technique; electrostatic droplet ejection; the field [1]. Then the electrostatic field draws the meniscus of weak current the liquid into a sharp cone called Taylor Cone [2]. When the electrostatic forces exceed the surface tension, charged liquid droplets ejected from the peak of the cone [3]. Fig. 1 shows a I.INTRODUCTION schematic representation of electrostatic droplet ejection Over the past decades, there has been much research on issuing from the stainless-steel capillary-type needle tip. electrostatic droplet ejection. The electrostatic droplet ejection technique has expected to be applied in various scopes, such as III. EXPERIMENTAL APPARATUS AND DETECTION DEVICE electronics devices, total analysis systems, combinatorial chemistry assays and bio-system devices [1][2][3][4]. ElectrostaticAs the most direct approach, detection technique for weak droplet ejection has great advantages in ejecting smaller and current of the electrostatic droplet ejection is present in this better droplets. Except that, its performance factors such as research...

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“…

For further researching on electrostatic droplet speed camera [5][6][7]. For further researching on the electrostatic ejection, much detection methods have been studied.

…”

mentioning

confidence: 99%

mentioning

confidence: 99%