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Processing method and circuit of aero-engine pressure sensor signal

A pressure sensor and aero-engine technology, applied in instruments, time registers, registering/indicating the operation of vehicles, etc., to achieve the effects of strong practicability, good stability and strong output signals

Inactive Publication Date: 2019-09-24
XIAN AVIATION COMPUTING TECH RES INST OF AVIATION IND CORP OF CHINA
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AI Technical Summary

Problems solved by technology

[0004] Since the existing signal acquisition technology rarely accurately collects the pressure sensor signal of the system, the design of the weak signal acquisition method for the pressure sensor of the aero-engine auxiliary power system is very critical.

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  • Processing method and circuit of aero-engine pressure sensor signal
  • Processing method and circuit of aero-engine pressure sensor signal
  • Processing method and circuit of aero-engine pressure sensor signal

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Embodiment Construction

[0025] The purpose of the present invention is to solve the problem that the complex weak differential signal output by the pressure sensor of a certain type of aero-engine auxiliary power system is difficult to collect, and to invent a weak signal acquisition method to realize the accurate acquisition of the pressure sensor signal of the aero-engine auxiliary power system.

[0026] In order to achieve the above object, the technical solution of the present invention is as follows: a signal acquisition method of an aeroengine auxiliary power system pressure sensor, said solution comprising an EMI protection unit, a passive low-pass filter unit, a differential amplification unit, an active second-order low-pass filtering unit.

[0027] The pressure signal output by the auxiliary power system pressure sensor first passes through the EMI protection unit for EMI protection, then passes through the passive low-pass filter unit to attenuate the noise outside the frequency range, and ...

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Abstract

In order to solve a problem of difficult collection of a complex weak differential signal outputted by an auxiliary power system pressure sensor of a certain type of aero-engine, the invention provides a method for collecting a signal from an auxiliary power system pressure sensor of an aero-engine, thereby realizing accurate acquisition of the auxiliary power system pressure sensor signal of the aeroengine. According to the method, an EMI protection unit, a passive low pass filtering unit, a differential amplifying unit, and an active second-order low-pass filtering unit are arranged. The method is designed simply; the anti-interference ability is strong; and the output signal has high intensity. Compared with the traditional signal acquisition system, the signal acquisition method having high universality can be applied to the aeroengine sensor conditioning circuit.

Description

technical field [0001] The technical field of the invention belongs to the technical field of signal acquisition of an aero-engine auxiliary power system. Background technique [0002] In the second power field, the auxiliary power system (APS) is a system independent of the aircraft engine, which can provide the aircraft with functions such as rapid engine start, air emergency support, cockpit bleed air, and power supply. [0003] Nowadays, in each unit of the auxiliary power system, more and more electrical sensors are used, which have gradually replaced traditional mechanical sensing devices. Many of these sensors are mainly used in harsh environments with high temperature and high vibration, and their output signals are very complex, often at the millivolt level, with strong noise interference and poor linearity. Therefore, the acquisition of pressure sensor signals such as the compressor inlet pressure signal of the auxiliary power unit (APU), the fuel pressure signal ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G07C5/08
CPCG07C5/0841
Inventor 冯浩赵振宇赵建平周骁王伟吕伟
Owner XIAN AVIATION COMPUTING TECH RES INST OF AVIATION IND CORP OF CHINA
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