Shichao Yue
Dina Katabi
Abstract
Surface tension is an important property of liquids. It has diverse uses such as testing water contamination, measuring alcohol concentration in drinks, and identifying the presence of protein in urine to detect the onset of kidney failure. Today, measurements of surface tension are done in a lab environment using costly instruments, making it hard to leverage this property in ubiquitous applications. In contrast, we show how to measure surface tension using only a smartphone. We introduce a new algorithm that uses the small waves on the liquid surface as a series of lenses that focus light and generate a characteristic pattern. We then use the phone camera to capture this pattern and measure the surface tension. Our approach is simple, accurate, and available to anyone with a smartphone. Empirical evaluations show that our mobile app can detect water contamination and measure alcohol concentration. Furthermore, it can track protein concentration in the urine, providing an initial at-home test for proteinuria, a dangerous complication that can lead to kidney failure.
- Behroozi, F., Perkins, A. Direct measurement of the dispersion relation of capillary waves by laser interferometry. Am. J. Phys. 74, 11 (2006), 957--961.Google Scholar
Cross Ref
- Blandford, R.D., Thorne, K.S. Applications of Classical Physics. California Institute of Technology, California, USA, 2008.Google Scholar
- Bormashenko, E., Musin, A. Revealing of water surface pollution with liquid marbles. Appl. Surf. Sci. 255, 12 (2009), 6429--6431.Google ScholarCross Ref
- Chen, H., Muros-Cobos, J.L., Amirfazli, A. Contact angle measurement with a smartphone. Rev. Sci. Instrum. 89, 3 (2018), 035117.Google ScholarCross Ref
- Chen, H., Muros-Cobos, J.L., Holgado-Terriza, J.A., Amirfazli, A. Surface tension measurement with a smartphone using a pendant drop. Colloids Surf. A Physicochem. Eng. Asp. 533, (2017), 213--217.Google ScholarCross Ref
- Cicconet, M., Birodkar, V., Lund, M., Werman, M., Geiger, D. A convolutional approach to reflection symmetry. Pattern Recognit. Lett. 95, (2017), 44--50.Google ScholarCross Ref
- Dhekne, A., Gowda, M., Zhao, Y., Hassanieh, H., Choudhury, R.R. Liquid: A wireless liquid identifier. In Proceedings of the 16th Annual International Conference on Mobile Systems, Applications, and Services (2018), ACM, Munich, Germany, 442--454.Google ScholarDigital Library
- Diskin, C.J., Stokes, T.J., Dansby, L.M., Carter, T.B., Radcliff, L. Surface tension, proteinuria, and the urine bubbles of hippocrates. Lancet 355, 9207 (2000), 901--902.Google ScholarCross Ref
- FDS. Digital tensiometer -- dcat11, 2018. http://www.fdsc.com/wpdev15/?portfolio=dca11.Google Scholar
- A. Government. Microalbumin level; 2018. https://meteor.aihw.gov.au/content/index.phtml/itemId/270339/.Google Scholar
- Goy, N.A., Denis, Z., Lavaud, M., Grolleau, A., Dufour, N., Deblais, A., Delabre, U. Surface tension measurements with a smartphone. Phys. Teach. 55, 8 (2017), 498--499.Google ScholarCross Ref
- Ha, U., Ma, Y., Zhong, Z., Hsu, T.M., Adib, F. Learning food quality and safety from wireless stickers. In Proceedings of the 17th ACM Workshop on Hot Topics in Networks (2018), ACM, Redmond, Washington, USA, 106--112.Google ScholarDigital Library
- Kruss. Force tensiometer -- k6, 2018. https://www.kruss-scientific.com/products/tensiometers/force-tensiometer-k6/.Google Scholar
- Liang, C.K., Chang, L.W., Chen, H.H. Analysis and compensation of rolling shutter effect. IEEE Transactions on Image Processing, 2008.Google Scholar
- Mogensen, C. Microalbuminuria predicts clinical proteinuria and early mortality in maturity-onset diabetes. N. Engl. J. Med. 310, 6 (1984), 356--360.Google ScholarCross Ref
- Pye, V.I., Patrick, R. Ground water contamination in the united states. Science 221, 4612 (1983), 713--718.Google ScholarCross Ref
- Rahman, T., Adams, A.T., Schein, P., Jain, A., Erickson, D., Choudhury, T. Nutrilyzer: A mobile system for characterizing liquid food with photoacoustic effect. In SenSys. ACM, Stanford, CA, 2016.Google Scholar
- Speight, J.G., et al. Lange's handbook of chemistry, Volume 1. McGraw-Hill, New York, 2005.Google Scholar
- Sridhar, M., Reddy, C.R. Surface tension of polluted waters and treated wastewater. Environ. Pollut. B. Chem. Phys. 7, 1 (1984), 49--69.Google ScholarCross Ref
- Vazquez, G., Alvarez, E., Navaza, J.M. Surface tension of alcohol + water from 20 to 50°c. J. Chem. Eng. Data 40, 3 (1995), 611--614.Google ScholarCross Ref
- Wang, J., Xiong, J., Chen, X., Jiang, H., Balan, R.K., Fang, D. Tagscan: Simultaneous target imaging and material identification with commodity rfid devices. In Proceedings of the 23rd Annual International Conference on Mobile Computing and Networking. ACM, Salt Lake City, Utah, USA, 2017.Google ScholarDigital Library
- Wei, M., Huang, S., Wang, J., Li, H., Yang, H., Wang, S.. The study of liquid surface waves with a smartphone camera and an image recognition algorithm. Eur. J. Phys. 36, 6 (2015), 065026.Google ScholarCross Ref
- Yeo, H.S., Flamich, G., Schrempf, P., Harris-Birtill, D., Quigley, A. Radarcat: Radar categorization for input & interaction. In Proceedings of the 29th Annual Symposium on User Interface Software and Technology. ACM, Tokyo, Japan, 2016.Google ScholarDigital Library
- Zhu, F., Miao, R., Xu, C., Cao, Z. Measurement of the dispersion relation of capillary waves by laser diffraction. Am. J. Phys. 75, 10 (2007), 896--898.Google ScholarCross Ref
Index Terms
- Liquid testing with your smartphone
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