For the full video of this presentation, please visit: https://www.embedded-vision.com/platinum-members/8tree/embedded-vision-training/videos/pages/may-2017-embedded-vision-summit For more information about embedded vision, please visit: http://www.embedded-vision.com Arun Chhabra, CEO of 8tree, presents the "Designing Vision Systems for Human Operators and Workflows: A Case Study" tutorial at the May 2017 Embedded Vision Summit. During the past several decades, manual measurement methods – using rulers and dial gauges – have been the status quo for inspecting dents, bumps, lightning strikes and corrosion blend-out on an aircraft. These traditional methods have been time-consuming and prone to subjectivity and human error. Emerging optical inspection technologies are changing things for the better. User-centric, vision-based tools empower operators to achieve greater efficiency, accuracy and consistency, slashing inspection and reporting times by 90%, without requiring extensive training or workflow changes. Chhabra's presentation discusses how such emerging tools, designed to address real-world problems, can improve aircraft turn-around-time (TaT), while enhancing safety through an improved understanding of airframe reliability.

1. Copyright © 2017 8tree 1
Arun Chhabra
May 2017
Designing Vision Systems for
Human Operators and Workflows:
A Case Study

2. Copyright © 2017 8tree 2
The Dent-mapping Problem
www.8-tree.com
Hail Damage Damage due to ground equipment Lightning strike
(Image Source: Boeing)
The Challenge The Ideal Solution
Achieve reliable, accurate and objective
- Dent-mapping & assessment
- Corrosion Blend-out
Real-time. Boosts inspection efficiency
Reliable & Consistently Accurate
Comprehends industry-mandated* tolerances
Instant Answers…not just data
Handheld-portable. Field-friendly. Zero Learning Curve
No Surface Preparation needed
(Image Source: Wikipedia)
* Structural Repair Manual (SRM) details tolerances for Aviation Maintenance industry

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What operators demand What operators must tolerate
Ease of use Difficult learning curve
Accuracy Complex tools & menus
Consistency Long interpretation & reporting time
Reliability Subjectivity & Human-error
Operator Experience Today

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A Case Study

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“Traditional dent-checking methods are very time
consuming and frustrating”
Valter Fernandes
EVP, Operations
TAP-Maintenance & Engineering
TAP-M&E: The Problem Statement

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Traditional Mapping Workflow

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• Point-and-shoot… “go/no-go” analysis
• Never look away – eyes always on task!
Implementing dentCHECK®
@ TAP-M&E

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Dent Reporting with dentCHECK
Information Rich Reporting
A / Y (or W / D)
Deepest point x-section
Distance to frame & stringer
Detailed log (operator ID, time-stamp, job
#)
Color-coded annotation
Audit-ready digital reporting
Customizable reports
• Dent-Reporting Tool (DRT) – Image-based reporting format with traceable measurement values
• New business model enabling a different set of stakeholders

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Workflow Benefits: dentCHECK @ TAP-M&E
AR-enabled ‘go/no-go’ answers SRM compliant
Zero-learning curve Detailed dent-mapping analytics
Handheld portability Tether less & fully-networked design
“Bring the Airplane into the Office” OEM Approved

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>90% reduction in dent-mapping times
Efficiency Gains: dentCHECK @ TAP-M&E
2
16
30
240
0 50 100 150 200 250
1 hour
8 hours
(1-shift)
Total Dents Mapped
Dents inspected per time-period
(higher is better)
dentCHECK Traditional Methods
5
10
10
10
35
1
0.5
0.5
1
3
0 5 10 15 20 25 30 35
Setup per dent
Operator maps dent
Peer review/consensus
Create dent-report
Total
Minutes
Inspection time per Dent
(lower is better)
dentCHECK Traditional Methods
14 days of time & labor saved with each day
of dentCHECK use
ROI period <3 months

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“dentCHECK isn’t simply an enhancement to our dent-
mapping processes…
…it’s a huge leap in efficiency!”
Valter Fernandes
EVP, Operations
TAP-Maintenance & Engineering
Empowering Airlines/MROs

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Vision System Design Philosophy

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dentCHECK application, product and workflow

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Technology & Usability Engineering
MemorabilityEfficiencyLearnability Errors Satisfaction
Accuracy Repeatability
+
Research Citation: Jacob Nielsen; “Usability Engineering”; 1993
“Don't bend to technology.
Bend technology to your needs”
Jason Pontin
MIT Technology Review

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Design considerations for shop floor use
“Ease of Use guides everything”
Make the technology transparent
AR-enabled UX/UI
Tether less & fully-networked
Handheld portability
Near real-time response <1s
Zero-learning curve
Drop-protection
Long-lasting calibration

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• USB3 camera with IMX174 Sensor
running at 160 Hz
• Intel NUC computer with i5 processor
• TI DLP projector
• 98Wh battery = 4 hrs operation
• Scan time = 0.1 s
• Evaluation time = 2-5 s
• Augmented Reality (AR) projection of
results onto the inspected part
• 2-button operation
How did dentCHECK address these challenges?
Intel NUC computer
DLP projector
IMX 174 Sensor camera

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• The Virtual CAD model  what does the undamaged surface look like?
• Fit a mathematical surface to the 3D scan data
• Measure and display the size & depth of a dent
• Knowing what is right and what is wrong without further input
• This works on planar and simple curved surfaces
How does dentCHECK work?
Fitted
Surface

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Ease-
of-
Use
Intuitive
Portable
& Self-
contained
Flexible
High-
speed
Accurate &
Consistent
Zero Learning Curve
1-button operation
Tablet/smartphone control
No surface preparation needed
Traceable to
National
Standards Lightweight
No cables or monitor
No external CPU
Actionable Results <2 sec
Efficiency boost >10x
Real-time feedback
Barcode Configuration
Ease-of-Use that Empowers the Operator

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Who’s using dentCHECK?

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Arun Chhabra
arun@8-tree.com
+1 408 813 0969