A passive sensing device for a cloud on the skyline detection

摘要

There is a set of sensing devices for a cloud on sky detection. The common passive examinations of cloud presence arerealized with digital post processing of picture that was taken with fish eye lenses. Therefore, results of examinations aredelayed and information at skyline is degraded. The common examinations include also thermal image analysis or theactive laser distant sensors adaptations. The common feature of these sensors is the high cost of equipment. Thus,sensing device constructions for real-time measurements of clouds taking place on the skyline have been examined.Examinations were performed at the same time with two sensing devices that include two different optical channels. Thefirst sensing device, used as a laboratory reference, consists of two spectrometers Maya 2000 pro while mechanicmodule consists of a plate with large core optical fiber adapter and fiber optic collimator adapter. These adapters are usedto fix collimator and an optical fiber that is connected to a proper spectrometer. The examination results enable to pointrelation of variation of cloud cover factor as variation in semi-stable band 440 nm and variation in an unstable band thatextends to longer than 550 nm wavelengths. Therefore, the second device, aimed as a cost effective consist of twooptoelectronic sensors type BH1750 and OPT101 that are connected by a mechanical adapter that includes optical filtersto binoculars. These optical filters are 440 nm band pass and 550 nm long pass. The data obtained of examinations showthat the second construction may be a base for further development of data processing algorithms for passive sensingdevice for a cloud on the skyline detection.