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Method for testing airplane model lightning current distribution by utilizing thermal infrared imager

A technology of infrared thermal imager and current distribution, which is applied in the direction of measuring current/voltage, instruments, measuring electrical variables, etc., can solve problems such as simulation calculations, and achieve the effect of high test accuracy

Inactive Publication Date: 2010-09-22
XIAN AIRBORNE ELECTROMAGNETIC TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the absence of suitable test methods in the prior art, there is a defect that only the simulation calculation of the lightning current distribution of the aircraft can be carried out

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] A test method for lightning current distribution using an infrared thermal imager is carried out according to the following steps:

[0024] (1) Use a 1:25 scale model of a large transport aircraft to replace the whole aircraft as a test piece. The scale model is made of wood, and the surface is evenly sprayed with metal aluminum, and the aircraft model is placed on an insulating support;

[0025] (2) Select the position of the discharge electrode according to the entry point of the lightning channel when the aircraft is struck by lightning, and then select the grounding position according to the departure point of the lightning channel. The positions of the above-mentioned discharge electrodes include the nose, the engine front end on the wing, and the wing Tip, vertical tail wingtip; the corresponding positions for grounding in turn mainly include the tail of the belly, the tail of the belly, the tip of the wing on the other side, and the front of the belly;

[0026] (...

Embodiment 2

[0034] A test method for lightning current distribution using an infrared thermal imager is carried out according to the following steps:

[0035] (1) Use a 1:20 scale model of a certain type of seaplane instead of the whole aircraft as a test piece. The scale model is a wooden structure, and the surface is evenly sprayed with metal aluminum, and the aircraft model is placed on an insulating support;

[0036] (2) Select the position of the discharge electrode according to the entry point of the lightning channel when the aircraft is struck by lightning, and then select the grounding position according to the exit point of the lightning channel. Wing tip, vertical tail wing tip; the corresponding positions of the grounding sequence mainly include the tail of the belly, the tail of the belly, the tip of the other wing, and the front of the belly;

[0037] (3) Fix the discharge electrode and grounding wire at the selected position with conductive copper tape, and fix the infrared...

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Abstract

The invention discloses a method for testing airplane model thunder and lightning current distribution by utilizing a thermal infrared imager, comprising the following steps: utilizing a scaling airplane model to replace an airplane to test; placing the airplane model on an insulation bracket; selecting an connected electrode and a discharge electrode and an earthing position according to a thunder and lightning channel when the airplane suffers from lightning stroke; adjusting the rolling angle and infrared thermal imager position of the airplane model; shooting a test piece infrared thermal image before discharge to be used as a standard image; immediately shooting heated infrared thermal image after discharge; dividing the area in which the airplane is located into 40*40 grids; and calculating the temperature variation value of each point; analyzing the relationship of the temperature rise of a conductor and current to obtain two-dimensional current distribution on the surface of the test piece. The method has the characteristics of less equipment, low testing cost, consistence with actual conditions and higher test accuracy; the two-dimensional grids are used to show test results, and can intuitively reflect the current distribution condition. The method can be widely applied to various airplane models and relatively model tests suffered from lightning stroke.

Description

technical field [0001] The invention relates to a test method for lightning current distribution, in particular to a test method for using an infrared thermal imager to test the lightning current distribution of an airplane model. Background technique [0002] After the aircraft is struck by lightning, because the lightning discharge current has the characteristics of fast rising speed and large amplitude, it may cause direct effects such as burning, erosion, and structural deformation on the parts transmitting lightning current. When the lightning channel is struck by lightning, the flow of current between the entry point and the exit point, as well as the inductance and resistance of different parts of the aircraft will cause different parts to be affected quite differently. By simulating the large current test of lightning and investigating the distribution of lightning current on the surface of the aircraft, it can provide reference and basis for the lightning protection...

Claims

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Application Information

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IPC IPC(8): G01R19/00
Inventor 熊秀骆立峰范晓宇王龙
Owner XIAN AIRBORNE ELECTROMAGNETIC TECH
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