Method and device for measuring rotating speed of aero-engine

Abstract

The invention discloses a method for measuring the rotating speed of an aero-engine. According to the method, a magnetic component is disposed on a rotating shaft of an aero-engine, and is used for generating a magnetic field with the magnetic field direction perpendicular to the axial direction of the rotating shaft of the aero-engine and the magnetic field distribution periodically changing with the rotation of the rotating shaft of the aero-engine, at least one pair of Hall sensors are arranged on the peripheral side of the aero-engine, the measuring planes of the Hall sensors are perpendicular to the magnetic field direction, the Hall sensors are oppositely and symmetrically arranged, a pair of differential rotating speed signals with the same amplitude and opposite phases are collected through the Hall sensors, and the rotating speed of the aero-engine is obtained by processing the differential rotating speed signals. The invention further discloses a device for measuring the rotating speed of an aero-engine. Compared with the prior art, various signal interference problems can be avoided to the greatest extent, and the self-diagnosis function of the rotating speed sensor is easy to realize.

Description

technical field [0001] The invention relates to a method for measuring the rotational speed of an aeroengine. Background technique [0002] In the control of aeroengines, the engine speed is a very important controlled quantity. The control of the engine state is reflected in the control of the speed, and the speed is also an important parameter to evaluate the performance of the engine. Therefore, the accuracy and stability of rotational speed measurement directly affect the control state of the engine. [0003] The speed sensors generally used in aero-engines include Hall sensors, magnetoelectric speed sensors, photoelectric speed sensors and speed measuring motor sensors. At present, most aeroengines use Hall sensors for speed measurement, but because the speed signals generated will be interfered by external noise, differential Hall sensors are often used. The existing differential Hall sensor still uses a single-channel Hall sensor to collect the magnetic field signal...

AI Technical Summary

Problems solved by technology

At present, most aero-engines use Hall sensors for speed measurement, but because the speed signals generated will be interfered by external noise, differential Hall sensors are often used

The existing differential Hall sensor still uses a single-channel Hall sensor to collect the magnetic field signal. The differential signal is output after the difference of the collected single-channel speed signal by the internal differential output module. The traditional differential Hall sensors can avoid signal interference in signal transmission to a certain extent, but still do not solve the problem of noise interference in complex environments from the perspective of signal sources; in addition, traditional differential Hall sensors are limited by their signal generation methods. Difficult to achieve in terms of sensor self-diagnosis

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