摘要:
A field unit for warning of a danger of collision between an aircraft and an obstacle, in particular a topographical ground obstacle or an obstacle formed by a mast, building or aerial cable structure, comprises a multi-part tubular mast having devices for fixing a solar panel and a radar antenna; an elongate radar antenna in an environment-protective casing, which, with an electronics unit, forms a radar system for synthesized radar detection of an aircraft in a radar coverage area; a central processing unit for identifying on the basis of information from the radar system an aircraft which is in a zone of the radar coverage area and which on the basis of radar information such as direction, distance and/or speed computes a collision danger area; and a high-intensity light system and radio transmitter system that can be activated by the central processing unit upon detection of an aircraft in a collision danger area. The radio transmitter system may be a VHF or UHF radio transmitter system for providing a radio signal modulated by an audible warning signal, preferably a voice warning signal, whilst the light system preferably comprises a stroboscope light system. The field unit is arranged for communication with other similar field units for remote activation of light or audio warnings in a neighbouring field unit.
摘要:
A concealed antenna node (300) for mounting on a street pole comprises an antenna (700) with an associated radio module (702) which are pre-wired together and housed within a radome (304) of the concealed antenna node (300). The antenna (700) comprises a plurality of antenna columns (700A-700D) arranged about a central section (701) within which the radio module (702) is located. The antenna columns (700A-700D) are arranged in a spaced-apart formation such that a gap (703) is realised between adjacent antenna columns (700A-700D).
摘要:
The present invention relates to a method for the assembly of frustoconical concrete towers comprising a step of placing and positioning of at least one subset (4, 14) of a tower section formed by at least two segments (1, 11) in an area close to the base of the tower, a step of assembling the subset (4, 14) of the tower section by attaching at least two segments (1, 11), so that the assembled subset (4,14) is freestanding and a step of stacking the assembled subset (4, 14) onto an immediately lower tower section.
摘要:
The invention relates to a carrier system with electrical and electronic elements and connections for urban use, consisting of a base unit (1) which contains a built-in electrical plate (4) and a CPU unit (5), connected to an electric power supply, for the connection of service function means (7) located in external couplings (8), said base unit (1) also including a coupling (9) for optionally mounting a post (10) which, in turn, carries service functions.
摘要:
Structures with interlocking components include a plurality of interlocking structure sections, each of the interlocking structure sections including at least one tensioning component and a plurality of compression components carried by the at least one tensioning component. The at least one tensioning component secures alternating ones of the plurality of compression components in adjacent ones of the plurality of interlocking structure sections in end-to-end, interlocking compression with each other.