Fixed differential pressure type attack angle sensor and using method

Abstract

The invention belongs to an airborne atmospheric data detection technology, and particularly relates to a fixed differential pressure type attack angle sensor and a using method. The device is in a straight rod shape; a proper sensing molded surface, a total pressure hole and an attack angle pressure hole are designed at the head of the fixed differential pressure type attack angle sensor; a mathematical model is established for attack angle calculation according to the sensed pressure difference between the total pressure and the attack angle pressure, the sensor can perform total pressure and static pressure sensing while measuring the attack angle, calculation of height and speed related parameters is achieved, and the functions of ice prevention, deicing, dust prevention and water prevention are achieved. The sensor has the advantages of high integration degree, high measurement precision, miniaturization, simple manufacturing process, good aerodynamic consistency, high percent ofpass and short manufacturing period, and is more suitable for integration, intelligence and low-cost use requirements of airplanes.

Description

technical field [0001] The invention belongs to airborne atmospheric data detection technology, and in particular relates to a fixed pressure difference type attack angle sensor and a use method. Background technique [0002] At present, the airborne angle-of-attack measurement equipment is a rotating vane-type angle-of-attack sensor and an L-shaped differential pressure angle-of-attack sensor that establishes a mathematical model to measure the angle of attack through the pressure difference and total pressure of the upper and lower angle-of-attack pressure holes. The windvane angle-of-attack sensor measures the angle of attack by using the clamping effect of the high-speed airflow on the windvane so that it is always aligned with the direction of the airflow. Due to the existence of the rotating mechanism, the reliability of the angle-of-attack sensor is low; the L-shaped differential pressure angle-of-attack sensor has many gas channels and high manufacturing costs, which...

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