Image-based height measuring systems for liquid or particles in tanks

Ming Chih Lu, Wei Yen Wang, Hung Hsun Lan

Research output: Chapter in Book/Report/Conference proceedingConference contribution

26 Citations (Scopus)

Abstract

In this paper, an image-based height measuring system for liquid or particulate material, which does not use pixels to measure distance, is proposed to measure the material height inside of a storage tank. Two laser projectors, fixed on a base, define a vertical plane to produce two projected bright spots on the surface of the material in the tank. A timer, instead of pixel counter, for measuring distance and a circuit for counting the number of clock pulses between the two bright spots are employed to calculate the distance between the two projected bright spots in the video images. Since the two laser projectors form an isosceles triangle, there is a simple relationship between the actual measured height and the distance of the two bright spots. The actual height of liquid in the tank can be calculated from a simple formula. One does not have to use a expensive high speed DSP microprocessor to identify the bright spots, but just use a simple voltage comparator to identify them. Experimental results have demonstrated the effectiveness of the proposed system.

Original languageEnglish
Title of host publicationConference Proceedings - 2004 IEEE International Conference on Networking, Sensing and Control
Pages24-29
Number of pages6
Volume1
Publication statusPublished - 2004
Externally publishedYes
EventConference Proceeding - 2004 IEEE International Conference on Networking, Sensing and Control - Taipei, Taiwan
Duration: 2004 Mar 212004 Mar 23

Other

OtherConference Proceeding - 2004 IEEE International Conference on Networking, Sensing and Control
CountryTaiwan
CityTaipei
Period04/3/2104/3/23

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Keywords

  • Image-based height measuring systems
  • Laser projectors
  • Voltage comparator

ASJC Scopus subject areas

  • Engineering(all)

Cite this

Lu, M. C., Wang, W. Y., & Lan, H. H. (2004). Image-based height measuring systems for liquid or particles in tanks. In Conference Proceedings - 2004 IEEE International Conference on Networking, Sensing and Control (Vol. 1, pp. 24-29)