A Liquid Level Measuring Device for a Tank Based on Image Senor

Abstract:

A non-contact liquid level measuring system is designed based on image processing technology, and it consists of three parts: a COMS camera, a laser source, and a PC. The work principle of the device is: the laser beam from the laser source is irradiated to the liquid at a certain angle, and the image of the tank’s interior is picked up by the CMOS camera; then the light spot on the liquid surface is extracted by the technology of image processing; Through the center of the light spot, the information about liquid-level can be obtained. The model of the measurement system is proposed in the paper, and the method of the calibration is given by using the least square algorithm. Experiments tests that the liquid level measuring device can be used in strict and adverse environment.

• Periodical: Advanced Materials Research (Volumes 443-444)
• Pages: 418-423
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.443-444.418
• Online since: January 2012
• Authors: Chun He Yu, Chao Zhang, Ying Bai, Chuan Huang
• Keywords: Image Processing, Liquid Level Measurement, Non-Contact Measurement

References

[1] S. Chakravarthy, R. Sharma, and R. Kasturi, Noncontact Level Sensing Technique Using Computer Vision, IEEE transactions on instrumentation and measurement, vol. 51, No. 2, april, 2002 pp.353-361.

DOI: 10.1109/19.997837

[2] S. A. Reza and N. A. Riza, Agile lensing-based non-contact liquid level optical sensor for extreme environments, Optics Communications-15007, 2010. pp.1-7.

DOI: 10.1016/j.optcom.2010.03.043

[3] S. A. Reza and N. A. Riza, Agile lensing-based non-contact liquid level optical sensor for extreme environments, Optics Communications-15007, 2010. pp.1-7.

DOI: 10.1016/j.optcom.2010.03.043

[4] B. J. Li, S. Yang, G. M. Fu, and F. D. Mei, Research on safety monitoring technology of oil tank area,　Industrial Safety and Environmental Protection, 2008 (34)10, pp.34-36.

[5] A. Saran , D. C. Abeysinghe , J. T. Boyd, Microelectromechanical system pressure sensor integrated onto optical fiber by anodic bonding, Applied Optics , 2006 , 45 ( 8) , pp.1737-1742.

DOI: 10.1364/ao.45.001737

[6] O. F. Perez , A. Rubino , J. M. Abril , etc, Fiber-optic liquid level continuous gauge, Sensors And Actuators A Physical , 2006 , 125 (2) : 124-132.

DOI: 10.1016/j.sna.2005.07.019

[7] Z. H. Zhao, Y. J. Gao, and Y. F. Luo, etc, An Optical Fiber Fabry-Perot Cavity Liquid Level Sensor Using Interference Fringe Counting Technique, Acta Photonica Sinica, 2008 37(7), pp.1369-1372.

[8] S.M. Chandani, and N.A.F. Jaeger, Optical . ber-based liquid level sensor, Opt. Eng., 2007, 46 (11), p.114–401.

[9] S.A. Reza, and N.A. Riza, A liquid lens-based broadband variable fiber optical attenuator, Opt. Commun. 2009, 282 (7) , p.1298.

DOI: 10.1016/j.optcom.2008.12.029