Influence of the setback of backgrounds behind semi-transparent synthetic targets on the accuracy of reflectorless distance measurements

Lenda, Grzegorz; Buczek, Michał

doi:10.1080/00396265.2019.1637095

Cited by 1 publication

(3 citation statements)

References 21 publications

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“…Usually, articles provide information only about sample thickness, not density. However, absolute RL EDMs errors, on various distances, were mostly of positive value [ 13 , 19 , 23 ]. Results similar to ours were obtained by Lenda and Marmol [ 22 ]: the value of absolute error on the distance of 5 m was 12.4 mm and 11.1 mm on 15 m. Lambrou and Pantazis, [ 20 ] in their research showed that in the distance of 50 m, the absolute error were of negative value.…”

Section: Resultsmentioning

confidence: 99%

“…Using the prism ensures the highest accuracy of the measurements, while the results of reflectorless (RL) EDMs exhibit higher variability [ 9 , 10 , 11 ]. The accuracy of RL EDM can change depending on the target’s parameters, such as material, density, chemical composition, thickness, surface roughness, colour, transparency, temperature and angle, which can contribute to scattering, refraction and reflection of the laser beam [ 12 , 13 ].…”

Section: Introductionmentioning

confidence: 99%

“…Partially transparent materials are known to reflect only part of the incident beam, and in extreme cases (high transparency) the beam is reflected by the background, thus, falsifying the measurement [ 13 ].…”

Section: Introductionmentioning

confidence: 99%

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The Influence of Target Properties on the Accuracy of Reflectorless Distance Measurements

Gmitrowicz‐Iwan

Myszura

Olenderek

et al. 2021

Sensors

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Recent years have brought dynamic developments in surveying equipment and techniques. These include reflectorless electromagnetic distance measurement (RL EDM), which is used in a range of devices, especially total stations. Studies concerning the influence of the reflecting surface on the accuracy of RL EDM tend to focus on the colour of the measurement surface, while the influence of the density and thickness of materials is usually neglected. Therefore, this study undertook to examine 53 samples representing various materials of dissimilar features: colour, type of surface and density. The results show that dark and mat surfaces cause higher RL EDM errors than bright, gloss materials. Nonetheless, 76% of the results were in compliance with equipment specifications. Moreover, it was found that the density of the samples had significant impact on the overall accuracy. RL EDM to EPS (expanded polystyrene sheets, low-density material, commonly called Styrofoam) involved a significantly higher error rate. It demonstrates that total station measurements and laser scanning should be performed cautiously, especially with regard to materials of low density (e.g., EPS) and on short distances, where the value of relative error is high.

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