Kamerastativer til bruk i et deployerbart perimeterovervåkingssystem

Abstract

The security of troops participating in international operations are utmost important. A well performing perimeter sur-veillance of the camps is hence required. Cameras will likely be a part of such systems either as a surveillance sensor or for verification purposes. In both these contexts robust camera stands are needed for generating stable images. Also in international operations, the transport distances are likely to be large. Thus, weight and volume have to be kept to a mi-nimum. We have designed and tested three different camera stand concepts. One is based on a trussed pole, either being identi-cal to the aluminium stands the road authorities are using, or being made of steel, one is simply an aluminium pole (tu-be) fastened to the ground with guy ropes, and one based on a tripod. All stands but the trussed pole are tested at Bodø Airport, which is known to be a very windy location. (A trussed pole of steel has already been tested with good results at a camp in Kosovo, and this pole has similar performance as a trussed pole of aluminium). Image sequences are recor-ded daily for each stand. For each sequence, image displacement and image rotation are estimated and recorded. The results show that the aluminium pole has virtually no displacements or rotations when the wind speed is less than 25-30 m/s. The tripod shows a similar performance for as low wind speeds as 5-10 m/s. Furthermore, the trussed pole used in Kosovo, has demonstrated a good performance during the last year. Thus, we recommend use of either the trus-sed poles or the aluminium pole. The tripod has to be developed further if it is to be used.