Abstract

A new coding and decoding method for digital levels is proposed. It is based on an area-array CCD sensor and adopts mixed coding technology. By taking advantage of redundant information in a digital image signal, the contradiction that the field of view and image resolution restrict each other in a digital level measurement is overcome, and the geodetic leveling becomes easier. The experimental results demonstrate that the uncertainty of measurement is 1mm when the measuring range is between 2m and 100m, which can meet practical needs.

© 2011 Optical Society of America

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References

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  1. X. Zhang, Z. X. Wang, and X. Y. Li, “Positioning algorithm of a new periodic bar code ruler,” Meas. Sci. Technol. 17, 876–880(2006).
    [CrossRef]
  2. V. Giniotis, D. Rekus, and C. Aksamitauskas, “Calibration of coded levelling staffs,” in The 7th International Conference on Environmental Engineering, pp. 1310–1313 (Vilnius Gediminas Technical University, 2008).
  3. H. Ingensand, “The evolution of digital levelling techniques—Limitations and new solutions,” in Geodesy Surveying in the Future on The Importance of Heights (Gavle, 1999), pp. 59–68.
  4. D. Rekus, V. C. Aksamitauskas, and V. Giniotis, “Application of digital automatic levels and impact of their accuracy on construction measurements,” in The 25th International Symposium on Automation and Robotics in Construction (Institute of Intelligent Technologies, 2008), pp. 625–631.
  5. L. F. Tu and S. D. Zhong, “New coding and decoding method for digital level meter,” J. Appl. Opt. 31, 459–462 (2010) (in Chinese).
  6. H. T. Wang, P. A. He, and J. Z. Yang, “A new decoding method for digital level,” Opt. Technol. 25, 35–38 (2005) (in Chinese).
  7. J. Z. Yang and Z. Q. Liu, The Principle and Calibration for Digital Level (Academic, 2005).
  8. H. Woschitz and F. K. Brunner, “Development of a vertical comparator for system calibration of digital levels,” Österreichische Zeitschrift für Vermessung und Geoinformation 91, 68–76 (2003).

2010

L. F. Tu and S. D. Zhong, “New coding and decoding method for digital level meter,” J. Appl. Opt. 31, 459–462 (2010) (in Chinese).

2006

X. Zhang, Z. X. Wang, and X. Y. Li, “Positioning algorithm of a new periodic bar code ruler,” Meas. Sci. Technol. 17, 876–880(2006).
[CrossRef]

2005

H. T. Wang, P. A. He, and J. Z. Yang, “A new decoding method for digital level,” Opt. Technol. 25, 35–38 (2005) (in Chinese).

2003

H. Woschitz and F. K. Brunner, “Development of a vertical comparator for system calibration of digital levels,” Österreichische Zeitschrift für Vermessung und Geoinformation 91, 68–76 (2003).

Aksamitauskas, C.

V. Giniotis, D. Rekus, and C. Aksamitauskas, “Calibration of coded levelling staffs,” in The 7th International Conference on Environmental Engineering, pp. 1310–1313 (Vilnius Gediminas Technical University, 2008).

Aksamitauskas, V. C.

D. Rekus, V. C. Aksamitauskas, and V. Giniotis, “Application of digital automatic levels and impact of their accuracy on construction measurements,” in The 25th International Symposium on Automation and Robotics in Construction (Institute of Intelligent Technologies, 2008), pp. 625–631.

Brunner, F. K.

H. Woschitz and F. K. Brunner, “Development of a vertical comparator for system calibration of digital levels,” Österreichische Zeitschrift für Vermessung und Geoinformation 91, 68–76 (2003).

Giniotis, V.

D. Rekus, V. C. Aksamitauskas, and V. Giniotis, “Application of digital automatic levels and impact of their accuracy on construction measurements,” in The 25th International Symposium on Automation and Robotics in Construction (Institute of Intelligent Technologies, 2008), pp. 625–631.

V. Giniotis, D. Rekus, and C. Aksamitauskas, “Calibration of coded levelling staffs,” in The 7th International Conference on Environmental Engineering, pp. 1310–1313 (Vilnius Gediminas Technical University, 2008).

He, P. A.

H. T. Wang, P. A. He, and J. Z. Yang, “A new decoding method for digital level,” Opt. Technol. 25, 35–38 (2005) (in Chinese).

Ingensand, H.

H. Ingensand, “The evolution of digital levelling techniques—Limitations and new solutions,” in Geodesy Surveying in the Future on The Importance of Heights (Gavle, 1999), pp. 59–68.

Li, X. Y.

X. Zhang, Z. X. Wang, and X. Y. Li, “Positioning algorithm of a new periodic bar code ruler,” Meas. Sci. Technol. 17, 876–880(2006).
[CrossRef]

Liu, Z. Q.

J. Z. Yang and Z. Q. Liu, The Principle and Calibration for Digital Level (Academic, 2005).

Rekus, D.

D. Rekus, V. C. Aksamitauskas, and V. Giniotis, “Application of digital automatic levels and impact of their accuracy on construction measurements,” in The 25th International Symposium on Automation and Robotics in Construction (Institute of Intelligent Technologies, 2008), pp. 625–631.

V. Giniotis, D. Rekus, and C. Aksamitauskas, “Calibration of coded levelling staffs,” in The 7th International Conference on Environmental Engineering, pp. 1310–1313 (Vilnius Gediminas Technical University, 2008).

Tu, L. F.

L. F. Tu and S. D. Zhong, “New coding and decoding method for digital level meter,” J. Appl. Opt. 31, 459–462 (2010) (in Chinese).

Wang, H. T.

H. T. Wang, P. A. He, and J. Z. Yang, “A new decoding method for digital level,” Opt. Technol. 25, 35–38 (2005) (in Chinese).

Wang, Z. X.

X. Zhang, Z. X. Wang, and X. Y. Li, “Positioning algorithm of a new periodic bar code ruler,” Meas. Sci. Technol. 17, 876–880(2006).
[CrossRef]

Woschitz, H.

H. Woschitz and F. K. Brunner, “Development of a vertical comparator for system calibration of digital levels,” Österreichische Zeitschrift für Vermessung und Geoinformation 91, 68–76 (2003).

Yang, J. Z.

H. T. Wang, P. A. He, and J. Z. Yang, “A new decoding method for digital level,” Opt. Technol. 25, 35–38 (2005) (in Chinese).

J. Z. Yang and Z. Q. Liu, The Principle and Calibration for Digital Level (Academic, 2005).

Zhang, X.

X. Zhang, Z. X. Wang, and X. Y. Li, “Positioning algorithm of a new periodic bar code ruler,” Meas. Sci. Technol. 17, 876–880(2006).
[CrossRef]

Zhong, S. D.

L. F. Tu and S. D. Zhong, “New coding and decoding method for digital level meter,” J. Appl. Opt. 31, 459–462 (2010) (in Chinese).

J. Appl. Opt.

L. F. Tu and S. D. Zhong, “New coding and decoding method for digital level meter,” J. Appl. Opt. 31, 459–462 (2010) (in Chinese).

Meas. Sci. Technol.

X. Zhang, Z. X. Wang, and X. Y. Li, “Positioning algorithm of a new periodic bar code ruler,” Meas. Sci. Technol. 17, 876–880(2006).
[CrossRef]

Opt. Technol.

H. T. Wang, P. A. He, and J. Z. Yang, “A new decoding method for digital level,” Opt. Technol. 25, 35–38 (2005) (in Chinese).

Österreichische Zeitschrift für Vermessung und Geoinformation

H. Woschitz and F. K. Brunner, “Development of a vertical comparator for system calibration of digital levels,” Österreichische Zeitschrift für Vermessung und Geoinformation 91, 68–76 (2003).

Other

J. Z. Yang and Z. Q. Liu, The Principle and Calibration for Digital Level (Academic, 2005).

V. Giniotis, D. Rekus, and C. Aksamitauskas, “Calibration of coded levelling staffs,” in The 7th International Conference on Environmental Engineering, pp. 1310–1313 (Vilnius Gediminas Technical University, 2008).

H. Ingensand, “The evolution of digital levelling techniques—Limitations and new solutions,” in Geodesy Surveying in the Future on The Importance of Heights (Gavle, 1999), pp. 59–68.

D. Rekus, V. C. Aksamitauskas, and V. Giniotis, “Application of digital automatic levels and impact of their accuracy on construction measurements,” in The 25th International Symposium on Automation and Robotics in Construction (Institute of Intelligent Technologies, 2008), pp. 625–631.

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Figures (4)

Fig. 1
Fig. 1

Quaternary pseudorandom code.

Fig. 2
Fig. 2

Mixed bar code.

Fig. 3
Fig. 3

Diagram of accurate height measurement.

Fig. 4
Fig. 4

Overview of detecting system: raster ruler, mixed coding staff and the digital level.

Tables (2)

Tables Icon

Table 1 Height Measurement Results at Sight Stadium 13.12 m

Tables Icon

Table 2 Height Measurement Results at Sight Stadium 95 m

Equations (7)

Equations on this page are rendered with MathJax. Learn more.

( n m + m 2 ) × Δ h L .
h 1 = n × Δ h .
H = h 1 + h 2 .
w = 1 n i = 1 n w i .
h j = N j ( n j ) × Δ h ,
h j = N j + + ( n j ) × Δ h .
h 2 = 1 m j = 1 m h j .

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