Automated Rivet Inspection for Aging Aircraft with Magneto-optic Imager
نویسندگان
چکیده
Magneto-optic Imaging (MOI) is a non-destructive evaluation technique that is being used increasingly in aircraft inspection. In order to address the problem of interpreting a large volume of inspection data and subjectivity of manual interpretation, this paper presents an automated rivet inspection algorithm that performs filtering, rivet detection, and classification using MOI. The algorithms developed are also implemented on a Digital Signal Processor (DSP) board for real time performance. Initial results of implementing the algorithm are presented.
منابع مشابه
Motion-based filtering of magneto-optic imagers
The magneto-optic imager (MOI) is a powerful device for the nondestructive inspection (NDI) of aging aircraft. MOI produces analog images of magnetic flux leakage associated with eddy current distribution around surface and subsurface structures. The main advantages of using MOI are its fast inspection speed and easy interpretation compared with conventional Eddy Current NDI instruments. Howeve...
متن کاملElectromagnetic Detection of Fatigue Cracks under Protruding Head Ferromagnetic Fasteners
The detection of fatigue cracks under installed fasteners has been a major goal of the aging aircraft NDE community. The Sliding Probe, Magneto-Optic Imager, Rotating Self-Nulling Probe, Low Frequency Eddy Current Array, and Eddyscan systems are among the instruments developed for this inspection. It has been verified that the detection of fatigue cracks under flush head aluminum and titanium f...
متن کاملMother-Crawler and Modular NDE-Boards for Robotics Scanning and Testing
INTRODUCTION Inspection in field conditions is labor intensive, demands great attention to details, subject to human errors and the reliability is limited. The interpretation of the data depends critically on the inspectors' experience, competence, attentiveness and meticulous dedication. For instance, rivet crack detection by eddy current is known to be a mundane and painstaking task, which ca...
متن کاملA systematic design methodology for generating the optimal repairs of aging aircraft
A design methodology which generates optimal mechanical repairs for aging aircraft is presented. Finite element modeling and analysis is used to evaluate the repairs. The repair problem is formulated as an optimization problem using an energy criterion. Optimal locations for rivet placement are found for many different situations.
متن کاملPredictions of Widespread Fatigue Damage Thresholds in Aging Aircraft
Commercial transport aircraft are required to operate under the concept of damage tolerance. Because of the structural redundancy and the crack arrest capability, the current fleet of commercial aircraft was initially designed to have sufficient residual strength to sustain discrete source damage. However, fatigue damage during the life of an aircraft can significantly reduce the residual stren...
متن کامل