naslovnica

IF JCR (2020): 0.551
IF SNIP (2020): 0.417
ISSN: 0351-0271
e-ISSN: 1581-1328
COBISS.SI ID: 5091842
UDK: 528=863
Zveza geodetov Slovenije
Publisher:
Association of Surveyors of Slovenia
Zemljemerska ulica 12, SI-1000 Ljubljana
E-mail: info@geodetski-vestnik.com
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Vpliv umetne osvetlitve invarskih nivelmanskih lat na izmero z digitalnimi nivelirji

The influence of artificial illumination of invar levelling rods on the measurements with digital levels

Author(s):

Štefan Rákay, Slavomír Labant, Karol Bartoš, Katarína Pukanská

Abstract:

Since the digital levels operate on the principle of image processing of the bar code of levelling rod, recorded by a CCD sensor, the proper lighting (i.e. illumination of the bar code) is important to achieve accurate results. The prevention of inappropriate lighting conditions is important for the correct recording of the image of bar code section. This paper examines the systematic error as a function of the angle of incidence at which an bar code is illuminated by artificial lighting in low light conditions. Further, the procedure of measurements and the analysis of results for the identification of such errors is proposed. The results of experimental measurements highlight the inappropriateness of bar code illumination at an angle of incidence of more than about 45 °. From the practical measurements, it was found that the angle of incidence 55 ° corresponds to an error of about 0.02 mm, which is twice as much as the resolution of the height measurement determined by the manufacturer.

Keywords:

precise levelling, digital level, bar code rod, precise levelling rods, systematic errors in levelling

DOI: 10.15292/geodetski-vestnik.2018.04.619-629

Citation:

Štefan Rákay, Slavomír Labant, Karol Bartoš, Katarína Pukanská (2018). Vpliv umetne osvetlitve invarskih nivelmanskih lat na izmero z digitalnimi nivelirji. | The influence of artificial illumination of invar levelling rods on the measurements with digital levels. Geodetski vestnik, 62 (4), 619-629. DOI: 10.15292/geodetski-vestnik.2018.04.619-629

ISSN: 0352-3551
EISSN: 1581-0267
COBISS: 3664386
UDK: (05) 532;556;626/628.6
Zveza geodetov Slovenije
Publisher:
Association of Surveyors of Slovenia
Zemljemerska ulica 12, SI-1000 Ljubljana
E-mail: info@geodetski-vestnik.com
CC