Detection of Automobile Metal Surface Defects Using Laser Light Reflection

Project Information

Title: Detection of Automobile Metal Surface Defects Using Laser Light Reflection

Subject: Engineering

Subcategory: Laser Technology

Grade level: Middle School - Grades 7-9

Academic Level: Ordinary

Project Type: Engineering

Cost: Medium

Awards: Global Finalist

Affiliation: Google Science Fair

Year: 2016

Materials: 5 steel sheet metal pieces, green laser pointer, potentiometer, photo-diode, Arduino Micro-controller Board, 7-segment display

Techniques:

Concepts: Reflection of light, light scattering

Description: The objective of this project is to find out if a laser light reflection detects defects on a metal sheet surface? A laser light was shone on the surface of a metal sheet, its reflection was captured by a photo-diode and the amount of current the photo-diode produces was measured taking in account that defects such as dents, bumps, or scratches on the surface of the metal sheet cause the increase of the scattering of of the reflected light, thus decreasing the amount of the current the photo-diode produces.

Link: www.googlesciencefair.com...

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Source: Wikipedia (All text is available under the terms of the Creative Commons Attribution-ShareAlike License)

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