Mandatory Traceability for Aerospace and Defense: From Raw Materials to Final Assembly

Aerospace and defense manufacturers mark parts directly, not with labels. Direct part marks (DPMs), either Data Matrix codes or human-readable characters, carry a part’s identify through decades of extreme heat, vibration, and cleaning. From turbine blades and blisks to landing gear and avionics, every component needs a permanent, scannable identity that can withstand challenging environments for its entire lifecycle. 

Reading those marks is the hard part. DPMs sit on curved, reflective, and low-contrast surfaces, and processes like machining, heat treatment, and shot peening can degrade a code long after it's applied.

• Reflective surfaces create glare and minimize contrast, making it hard for a vision system to read and decode codes.  
• Curved and round parts distort codes, making them hard to read.
• Surface finishes common in aerospace and defense manufacturing can obscure codes.
• Marking methods can present unique challenges. Dot peen marks can vary significantly while other marking methods can create shallow DPMs. Embossed DPMs can present completely new challenges. 

Cognex barcode reading and machine vision systems handle these challenges with ease. With AI-powered decoding, powerful optics, and controlled lighting, Cognex systems read and verify codes and characters even when they're damaged, obscured, or marked on round or reflective surfaces for increased read rates. The result is full traceability, reduced errors, and audit-ready compliance across your operation.

Cognex OCR solutions and image-based barcode readers support a wide range of aerospace and defense applications, including:

• Engine components: Read dot-peen and laser-etched codes on turbine blades, blisks, and vanes, even on shiny, curved, and textured metal surfaces.
• Structural and machined parts: Trace landing gear, brackets, fasteners, and fittings marked in titanium, aluminum, and nickel superalloys.
• Avionics and electronics: Decode small, high-density codes on PCBs and assemblies, including codes partially occluded by components.
• MRO, kitting, and receiving: Verify part identity during maintenance, repair, overhaul, and spare-parts handling with rugged handheld readers.

Many aerospace and defense parts carry alphanumeric characters cast, engraved, or embossed directly into the metal. Because those characters share the same material and color as the part, contrast is low and standard OCR struggles.

The technology behind reliable reads:

• AI-powered decoding algorithms reconstruct codes that are damaged, distorted, or poorly marked, so a worn dot-peen code still reads on the first pass.
• High-resolution and High Dynamic Range (HDR) imaging captures fine detail on shiny, curved, and uneven metal surfaces where a single conventional exposure would lose the code to glare or shadow.
• Powerful lighting shapes each image so a low-contrast dot-peen or laser-etched mark stands out from the surrounding material.
• Pre-trained OCR font libraries read cast, engraved, and embossed serial and part numbers, with quick retraining when a supplier change alters how a part looks.