Embedded health monitoring system for active and passive structure of aeroplane

Abstract

The invention discloses an embedded health monitoring system for an active and passive structure of an aeroplane, comprising a software module, a system power supply module, a controller module, a high-speed memory module, a sensor signal acquisition module, a signal magnifying module, an acoustic emission triggering module, a channel switching module, a digital management module, an excitation signal output module, a power magnifying module and a signal transfer module. The embedded health monitoring system can monitor the health condition of the aeroplane structure on line, has the advantages of compact structure, vibration resistance, electromagnetic interference resistance, small size, light weight, convenient carrying and installation, convenience for the maintenance personnel of the aeroplane and capability of realizing onboard carrying, integrates a plurality of damage monitoring methods, and automatically extracts structural damage characteristics and distinguishes the damages. In addition, the system has good expandability so as to very conveniently collocate and expand healthy monitoring software and healthy monitoring hardware; and the system is provided with standard onboard equipment interfaces, thereby being convenient for networking of a plurality of sets of systems and communication with other onboard systems.

Description

technical field [0001] The present invention relates to a structural health monitoring system based on active and passive Lamb wave and piezoelectric array sensor technology, in particular to an anti-vibration, anti-electromagnetic interference, small size, light weight, easy to carry and install, suitable for aircraft onboard, Embedded structural health monitoring system for aircraft maintenance personnel. Background technique [0002] Aircraft safety is a paramount issue. A plane crash brings not only economic damage, but also extensive political and social impacts. In recent years, many aircraft crashes have been caused by the fatigue of the main load-bearing structure of the aircraft and the disintegration of the aircraft body. Structural health monitoring technology can realize structural health self-diagnosis online to ensure the safety of structures and reduce maintenance costs. It is a new concept of using smart material structures, using the advanced sensing / actu...

AI Technical Summary

Problems solved by technology

[0004] At present, the research and application of structural health monitoring technology based on active and passive Lamb waves and piezoelectric sensor arrays at home and abroad are all carried out offline on the ground, the equipment used is huge, the connection relationship is complicated, and it is inconvenient for users to use; The airborne structural health monitoring system must have the characteristics of anti-vibration, anti-electromagnetic interference, small size, light weight, easy to carry and install, and convenient for aircraft maintenance personnel to use; if it is applied to the structural health monitoring of large aircraft, each main bearing Piezoelectric array sensors are required for any force structure, so it is necessary to use multiple sets of structural health monitoring systems to form a distributed monitoring network to complete the health monitoring of large aircraft structures. At this time, each structural health monitoring system must be able to communicate with each other and be able to communicate with Other airborne equipment (such as flight environment parameter test equipment, mechanical operation equipment, etc.) can interact to jointly diagnose the health status of the aircraft. This requirement cannot be met by current ground structure health monitoring equipment.

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