DEVICE TO PREVENT HELICOPTER COLLISION WITH HF OVERHEAD POWER LINES Russian patent published in 2010 - IPC G01S13/93 

FIELD: radiolocation.

SUBSTANCE: invention relates to radiolocation and can be used to prevent helicopter collision with HF overhead power lines (OPL). Proposed device comprise omnidirectional aerial, receiver, four keys, two threshold units, three triggers, tunable filter, n-digit shift register, k/n detector, two AND circuits, bright indicator, two OR circuits, sound indicator, synch pulse generator, frequency divider, single-digit counter, logical unit, two delay units, spot aerial, data processing unit, OPL angular position indicator, "turn-away" command indicators, all aforesaid components being interconnected in a certain way. Proposed device incorporates also radio beams and logic unit installed on OPL towers.

EFFECT: ruling out collision of helicopter with OPL.

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