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Device and method to measure stringer's angular position

IP.com Disclosure Number: IPCOM000249046D
Publication Date: 2017-Jan-30
Document File: 3 page(s) / 327K

Publishing Venue

The IP.com Prior Art Database

Abstract

For maintenance operations, operators, based outside the aircraft, use the stringers position to identify the aircraft part they have to work on. On metallic fuselage, the stringers position is easily visible thanks to rivet used to fix them, but, on composite fuselage, the stringers positions are invisible from outside the aircraft. The described solution is a device and a method using an inclinometer to know the angular position of a stringer. Linked to a database listing the angular position of all the aircraft stringers, the operator is able to identify a stringer and it position.

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DEVICE AND METHOD TO MEASURE STRINGER'S ANGULAR POSITION

Abstract: For maintenance operations, operators, based outside the aircraft, use the stringers position to

identify the aircraft part they have to work on. On metallic fuselage, the stringers position is

easily visible thanks to rivet used to fix them, but, on composite fuselage, the stringers positions

are invisible from outside the aircraft.

The described solution is a device and a method using an inclinometer to know the angular

position of a stringer. Linked to a database listing the angular position of all the aircraft stringers,

the operator is able to identify a stringer and it position.

TECHNICAL DOMAIN During maintenance operations, operators are positioned outside the aircraft and used the

stringers positions to identify aircraft areas which they should work on.

On metallic aircraft fuselage, stringers are riveted to the skin but on the composite aircraft

fuselage, they are bonded to the skin. On metallic fuselage, the position of the stringers is visible

thanks to the fasteners lines drawn by rivets but on composite fuselage, there are no elements

indicating the stringers' position, especially from outside of the aircraft. Today, some tools using

ultrasonic waves allow detecting a stringer when moving above a composite aircraft panel. By

counting each detected stringer, an operator may identify a working area.

BRIEF DESCRIPTION The hereunder-described proposal is a device and method using this device to identify the

stringer position by moving the device above the aircraft skin. Linked with a database listing the

stringer position associated to the stringer identification and so the aircraft part, the solution

allows knowing exac...