AIRCRAFT CRASH POINT DETECTION SYSTEM Russian patent published in 2013 - IPC B64D1/00 

FIELD: transport.

SUBSTANCE: invention relates to aircraft engineering. Proposed system comprises "black box" with signaling and search device arranged aboard the helicopter. Proposed black box is para dropped in the case of aircraft accident to emit electromagnetic waves and sound signals. In parachute opening, valve is opened to allow compressed air into rubber chamber to be inflated to make damping pad. Said electromagnetic waves and sound signals are also emitted from bottom in getting into water. Locating receiver arranged aboard the helicopter comprises measurement channel and four locating channels. Measurement channel comprises receiving antenna, HF amplifier, local oscillator, mixer, IF amplifier, demodulator of FM-signals, multipliers, narrowband filter, low-frequency filter and recording unit. Locating channels comprises receiving antenna, HF amplifiers, multipliers, narrowband filters, delay lines, phase detectors and master oscillator.

EFFECT: fast and accurate detection of "black box".

8 dwg