Sensing devices for color of medium-distant object on horizont immediate detection

A.Olejnik, M.Borecki, A.Rychlik, M.L. Korwin-Pawlowski, J.Szmidt;
Abstract
The common examinations of distant objects colors are realized with
digital post processing of picture. Therefore, results of examinations are
delayed. Thus, real-time measurements of medium distance objects colors
taking place on the skyline have been examined. The medium distant objects
that are under investigations are different type of skyscrapers positioned
at distant from 1 km to 3 km. Examinations were performed at the same time
with two type of color sensors. These sensors are TCS3200 and VEML4060,
they differ in dimensions, photonics characteristics and data transmission
type. Therefore for sensor examinations specialized mechanical adapters
has been prepared. Sensors calibration was performed with the laboratory
set-up consist of the specialized light sources, monochromator, fiber
optic light divider and optical power meter. During objects color
examinations sensors were connected with binoculars. Therefore, to carry
out the examinations, a standalone measurement system based on Nucleo64
board has been programmed. The data sampling ratio was 250/s. Obtained
results pointed that the use of an optoelectronic color sensor and a
commonly available optical system with a fixed focal lens enables
real-time measurements of objects’ colors located on the skyline. The
TCS3200 sensor show better agreement than VEML6040 with spectrometric
characteristics of distant objects.