KINEMATIC SENSOR OF AERODYNAMIC ANGLE AND TRUE AIR SPEED Russian patent published in 2020 - IPC G01P5/18 G01H11/08 

FIELD: measuring equipment.

SUBSTANCE: invention can be used for measurement of value (module) and angle of direction (aerodynamic angle) of aircraft true air velocity vector. Essence of the invention consists in that to the inertial sensor of aerodynamic angle and true air speed contains a board with receivers, recording parameters of the incoming air flow, measuring circuit, computing device for processing and generating output signals, wherein receivers are made in form of two superimposed pairs of piezoelectric emitters-receivers of ultrasonic oscillations in direction of incident airflow and against it, installed orthogonal to each other at an angle Θ₀=45° to axis of board, relative to which value of aerodynamic angle is counted, wherein inputs of piezoelectric emitters through elements of measurement circuit—modulators are connected to generator of sinusoidal oscillations of high frequency, and piezoelectric receivers through amplifiers and detectors of measurement circuit are connected to inputs of two frequency subtracting circuits, at the output of which there are formed frequency differences of pairs of receivers receiving ultrasonic oscillations in opposite directions, outputs of frequency subtracting circuits are connected to input of computing device for processing and generation of output signals, made in form of computer, which outputs are digital outputs on aerodynamic angle α and true air speed V_B determined in accordance with predetermined algorithms.

EFFECT: simplification of design, improvement of measurement accuracy, reduction of number of measuring channels and simplification of measuring circuit and device of information processing and generation of output signals.

1 cl, 6 dwg