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 language | English |
|---|---|
| Title of host publication | Conference Proceedings - 2004 IEEE International Conference on Networking, Sensing and Control |
| Pages | 24-29 |
| Number of pages | 6 |
| Volume | 1 |
| Publication status | Published - 2004 |
| Externally published | Yes |
| Event | Conference Proceeding - 2004 IEEE International Conference on Networking, Sensing and Control - Taipei, Taiwan Duration: 2004 Mar 21 → 2004 Mar 23 |
Other
| Other | Conference Proceeding - 2004 IEEE International Conference on Networking, Sensing and Control |
|---|---|
| Country | Taiwan |
| City | Taipei |
| Period | 04/3/21 → 04/3/23 |
Fingerprint
Keywords
- Image-based height measuring systems
- Laser projectors
- Voltage comparator
ASJC Scopus subject areas
- Engineering(all)
Cite this
Image-based height measuring systems for liquid or particles in tanks. / Lu, Ming Chih; Wang, Wei Yen; Lan, Hung Hsun.
Conference Proceedings - 2004 IEEE International Conference on Networking, Sensing and Control. Vol. 1 2004. p. 24-29.Research output: Chapter in Book/Report/Conference proceeding › Conference contribution
}
TY - GEN
T1 - Image-based height measuring systems for liquid or particles in tanks
AU - Lu, Ming Chih
AU - Wang, Wei Yen
AU - Lan, Hung Hsun
PY - 2004
Y1 - 2004
N2 - 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.
AB - 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.
KW - Image-based height measuring systems
KW - Laser projectors
KW - Voltage comparator
UR - http://www.scopus.com/inward/record.url?scp=2942657204&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=2942657204&partnerID=8YFLogxK
M3 - Conference contribution
AN - SCOPUS:2942657204
SN - 0780381939
VL - 1
SP - 24
EP - 29
BT - Conference Proceedings - 2004 IEEE International Conference on Networking, Sensing and Control
ER -