Skip to main content
SpringerLink
Log in

Droplet Image Feedback Control System in Evaporation Experiment

  • Original Article
  • Published:
Microgravity Science and Technology Aims and scope Submit manuscript

Abstract

In order to realize the steady-state droplet evaporation, image feedback control system is designed based on DSP. The system has three main functions: to capture and store droplet images during the experiment; to calculate droplet geometrical and physical parameters such as volume, surface area, surface tension and evaporation velocity at a high-precision level; to keep the droplet volume constant. The DSP can drive an injection controller with the PID control to inject liquid so as to keep the droplet volume constant. The evaporation velocity of droplet can be calculated by measuring the injected volume during the evaporation. The structure of hardware and software of the control system, key processing methods such as contour fitting and experimental results are described.

This is a preview of subscription content, log in via an institution to check access.

Access this article

Log in via an institution

Price excludes VAT (USA)
Tax calculation will be finalised during checkout.

Instant access to the full article PDF.

Institutional subscriptions

Similar content being viewed by others

References

  • Atae-Allah, C., Cabrerizo-vilchez, M., Gomez-Lopera, J.F., et al.: Measurement of surface tension and contact angle using entropic edge detection. Meas. Sci. Technol. 12, 288–298 (2001)

    Article  Google Scholar 

  • Badam, V.K., Kumar, V., Durst, F., Danov, K.: Experimental and theoretical investigations on interfacial temperature jumps dring evaporation. Exp. Therm. Fluid Sci. 32(1), 276–292 (2007)

    Article  Google Scholar 

  • Bechstedt, F.: Principles of Surface Physics. Springer, Berlin (2003)

    Google Scholar 

  • Cai, S.J., Yu, Q.: Optimization and application of connected component labeling algorithm based on run-length encoding. J. Comput. Appl. 28(12), 3150–3153 (2008)

    MATH  MathSciNet  Google Scholar 

  • Duan, F., Badam, V.K., Durst, F., Ward, C.A.: Thermocapillary transport of energy during water evaporation. Phys. Rev. E 72(5), 056303(1–11) (2005)

    Google Scholar 

  • Erbil, H.Y.: Surface Chemistry of Solid and Liquid Interfaces. Blackwell, Oxford (2006)

    Google Scholar 

  • Gonzalez, R.C., Woods, R.E., Eddins, S.L.: Digital Image Processing Using MATLAB. Prentice-Hall, Upper Saddle River (2003)

    Google Scholar 

  • Hartland, S.: Surface and Interfacial Tension: Measurement, Theory, and Applications. CRC, Boca Raton (2004)

    Google Scholar 

  • Hoorfar, M., Neumann, A.W.: Axisymmetric drop shape analysis (adsa) for the determination of surface tension and contact angle. J. Adhesion 80, 727–743 (2004)

    Article  Google Scholar 

  • Ning, Q., Zhu, Z.Q.: Determine the surface tension and contact angle of drop by image processing method. Chinese J. Space Sci. 28(1) (2008)

  • Popov, S., Melling, A., Durst, F., Ward, C.A.: Apparatus for investigation of evaporation at free liquid-vapour interfaces. Int. J. Heat Mass Transfer 48, 2299–2309 (2005)

    Article  Google Scholar 

  • Rotenberg, Y., Boruvka, L.: Determination of surface tension and contact angle from the shapes of axisymmetric fluid interface. J. Colloid Interface Sci. 93(1), 169–182 (1983)

    Article  Google Scholar 

  • Suzuki, K., Horiba, I., Sugie, N.: Linear-time connected-component labeling based on sequential local operations. Comput. Vis. Image Underst. 89(1), 1–23 (2003)

    Article  MATH  Google Scholar 

  • Weinberger, M.J., Seroussi, G., Sapiro, G.: The LOCO-I Lossless image compression algorithm: principles andstandardization into JPEG-LS. IEEE Trans. Image Proc. 9(8), 1309–1324 (2000)

    Article  Google Scholar 

  • Weszka, J.S.: A survey of threshold selection techniques. Comput. Graphics Image Proc. 7, 259–265 (1978)

    Article  Google Scholar 

  • Yu, Q., Ning, Q.: Image feedback control system in the space drop evaporation experiment. Chinese J. Space Sci. 28(1) (2008)

  • Yuan, Z.F., Mukai, K., Takagi, K., Ohtakam, M., Huang, W.L., Liu, Q.S.: Surface tension and its temperature coefficient of molten tin determined with the sessile drop mETHOD at different oxygen partial pressures. J. Colloid Interface Sci. 254(2), 338–345 (2002)

    Article  Google Scholar 

  • Zhu, Z.Q.: Experimental investigation on the coupling mechanism of thermocapillary convection and evaportaion ffect. Ph. D. thesis, Institute of Mechanics, Graduate School of Chinese Academy of Sciences (2009)

Download references

Author information

Authors and Affiliations

  1. Center for Space Science and Applied Research, Chinese Academy of Sciences, Beijing, 100190, China

    Qiang Yu, Shijie Cai & Binghong Zhou

  2. National Microgravity Laboratory, Institute of Mechanics, Chinese Academy of Sciences, Beijing, 100190, China

    Zhiqiang Zhu & Qiusheng Liu

Authors
  1. Qiang Yu
    View author publications

    You can also search for this author in PubMed Google Scholar

  2. Shijie Cai
    View author publications

    You can also search for this author in PubMed Google Scholar

  3. Zhiqiang Zhu
    View author publications

    You can also search for this author in PubMed Google Scholar

  4. Qiusheng Liu
    View author publications

    You can also search for this author in PubMed Google Scholar

  5. Binghong Zhou
    View author publications

    You can also search for this author in PubMed Google Scholar

Corresponding author

Correspondence to Qiang Yu.

Rights and permissions

Reprints and permissions

About this article

Cite this article

Yu, Q., Cai, S., Zhu, Z. et al. Droplet Image Feedback Control System in Evaporation Experiment. Microgravity Sci. Technol. 22, 139–144 (2010). https://doi.org/10.1007/s12217-009-9166-0

Download citation

  • Received:

  • Accepted:

  • Published:

  • Issue Date:

  • DOI: https://doi.org/10.1007/s12217-009-9166-0

Keywords

Search

Navigation