METHOD OF PREVENTING COLLISION OF HELICOPTERS WITH HIGH-VOLTAGE POWER LINES Russian patent published in 2011 - IPC G01S13/93 

FIELD: physics, radio.

SUBSTANCE: invention relates to radar engineering and can be used to prevent collision of helicopters with high-voltage power lines. The method involves receiving electromagnetic oscillations reflected from a power transmission line pole in the radio wave range using a direction finder mounted on a helicopter, where the centre of the scanning area coincides with the axis of the helicopter. The direction finder is used to scan space in the direction of flight of the helicopter. Locating angles α₁₁, α₂₁ of each of two power transmission line poles laying at a given distance from each other relative the axis of the helicopter are determined. Given distance is flown through without changing the course. Locating angles α₁₂, α₂₂ of each of two power transmission line poles are determined using the direction finder relative the axis of the helicopter. The distance to the wires of the power transmission lines in the direction of the axis of the helicopter is determined using the expression: where L_H is the given distance, µ is the angle between the power transmission line and the axis of the helicopter. The decision to correct the direction of flight of the helicopter is made based on the range value.

EFFECT: high reliability of preventing collision of a helicopter with a high-voltage power transmission line.

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