Kinematic sensor for aerodynamic angle and true airspeed

摘要

The utility model relates to the field of instrumentation, in particular to devices for measuring the magnitude (module) and direction angle (aerodynamic angle) of the true airspeed vector of an aircraft, in particular an airplane. The kinematic sensor of the aerodynamic angle and true airspeed contains a board with receivers of parameters of the incident air flow. Two combined pairs of piezoelectric emitters-receivers of ultrasonic vibrations mounted orthogonally to each other at an angle Θ = 45 ° to the axis of the board, relative to which the value of the aerodynamic angle is measured, are installed on the outer surface of the circuit board, streamlined by the incoming air stream. Emitters emit ultrasonic vibrations in the direction of the incoming air flow and against the direction of the incoming flow. The receivers of ultrasonic vibrations through the elements of the measuring circuit are connected to the inputs of the frequency subtraction circuits, the outputs of which are connected to the input of the calculator, the output of which is the digital outputs by the aerodynamic angle α and the true air speed V, determined in accordance with the algorithm M де L is the distance between the piezoelectric emitters and ultrasonic receivers fluctuations; Δƒ = ƒ-ƒ 'and Δƒ = ƒ-ƒ'; ƒƒ 'and ƒ, ƒ' are the frequencies of ultrasonic vibrations perceived by the pairs of receivers in opposite directions. The technical result in the implementation of the claimed solution is to simplify the design and increase the accuracy of the measurement by reducing the number of receivers for recording the parameters of the incoming air flow, reducing the number of measuring channels and simplifying a measuring circuit and a device for processing information and generating output signals and, as a result, ensuring competitiveness of application on le atelnyh devices, including aircraft of various classes and purposes, the kinematic sensor aerodynamic angle and true airspeed implementing kinematic measuring method. 6 ill.