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The impact of the colour of the surface on the results of measurements taken with the use of a triangular laser head

Zbrowski A.

Przegląd Elektrotechniczny

2013

R. 89, nr 11

93-97

The article presents the results of tests investigating the influence of the colour of the surface on the outcomes of measurements taken with the use of a triangular laser head. The differentiation of colours of the test samples was executed by the deposition of a protective-decorative layer in the PVD process. The application of the following layers: Al0,7Cr0,15Ti0,15N, CrN, TiN, a-C:H:N, and Al resulted in the procurement of a palette of five colours for 10 samples, in which each colour was deposited onto two surfaces with different roughness value (0.32 μm and 0.63 μm).

W artykule zaprezentowano rezultaty badań dokumentujące wpływ koloru powierzchni odniesienia na wyniki pomiarów realizowanych z zastosowaniem laserowej głowicy triangulacyjnej. Różne kolory próbek zostały uzyskane poprzez naniesienie warstw ochronnych lub dekoracyjnych za pomocą metod PVD. Zastosowanie warstw Al0,7Cr0,15Ti0,15N, CrN, TiN, a-C:H:N, oraz Al umożliwiło uzyskanie pięciokolorowej palety 10 próbek, w której każdy kolor jest nałożony na dwie powierzchnie o rożnych wartościach chropowatości (0.32 μm oraz 0.63 μm).

Influence the structure of the road surface on the measurement of distance and speed using optical head

Taubert S., Wierzejski A.

Journal of KONES

2013

Vol. 20, No. 4

465--469

The optical head is a linear vehicle speed sensor. Its action is based on image analysis of the moving road surface. A special algorithm converts it on the speed signal. Because the image of a road is analyzed, therefore the change in structure of the road surface causes change of the signal from the optical head. Therefore, for each type of surface, it is necessary to calibrate the optical head. Calibration consists of measuring, using an optical head, the length of the measurement distance, which was previously precisely measured with another reference device. Based on these two values the calibration factor is calculated, and entered afterwards in the optical head control software. This optical head is used in several the road tests, and its speed measurement function is used in the measurement of vehicle acceleration, braking distance, the total vehicle road load. This device, connected to the recorder, is also used in research on motion parameters of vehicle under real driving conditions. During these tests may occur the change of the road surface, therefore it is particularly important to know the influence of road surface structure on the signal from the optical head. This paper presents the results of optical head tests on the road with different structure and surface quality.