HELICOPTER AIR SIGNAL SYSTEM Russian patent published in 2014 - IPC G01P5/00 

FIELD: radio engineering, communication.

SUBSTANCE: invention relates to devices for measuring air signals of a helicopter. The helicopter air signal system comprises a multichannel aerodynamic receiver having 2n pilot tubes and 2n static pressure intake openings; outputs of the 2n pilot tubes are linked by pneumatic ducts to inputs of pneumatic-electric converters with electrical measuring circuits which are connected to a multiplexer, the output of which is connected through series-connected analogue-to-digital converter and microprocessor to an information display system, the output of which is the output of the system for altitude-velocity parameters. The helicopter air signal system further includes a unit for pneumatic switching of pilot pressure channels, which is linked at the inputs by pneumatic ducts to the total pilot tubes, and a unit for generating primary information signals on altitude-velocity parameters and an auto-correction periodicity control signal, linked at the pneumatic input by a pneumatic duct to the 2n static pressure intake openings, the first and second outputs of which are connected to the multiplexer, the third output is connected the input of the information display system and the fourth output is connected to the electrical input of the unit for pneumatic switching of pilot pressure channels.

EFFECT: considerable reduction of measurement error of altitude-velocity parameters of the helicopter, which is critical at low flight velocities.

6 cl, 3 dwg