3d scanning keynote presentation by lt. donny mahoney
TRANSCRIPT
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3D Laser Scanning
San Bernardino County Sheriff’s Department
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Lt. Donny Mahoney909-522-7580
Central Patrol
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Sorry Sarge…it wasn’t my fault! Dept. Liability?
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How do I Capture Every Piece of Evidence
in this scene?
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How Do I Document this Scene and Open the Roadway Quickly?
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Fatal Accident Reconstruction Team
(FART)
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Major Accident Investigation Team
(MAIT)
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Diagramming
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Measuring Equipment
• Fiberglass Tapes
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Drawing Equipment
• Drawing Templates
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Drawing Equipment
• Protractors and Compass
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Drawing Equipment
• Engineering Rulers
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y
x
Main Street
1st Street
Reference Line
Reference point
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y
x
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Nikon DTM-520Total Station
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MapScenes
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MapScenes
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Scientific Investigations Division
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1
2 34
5
6
Trajectory for an Officer Involved Shooting
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Trajectory for an Officer Involved Shooting
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Blood Spatter
Point of Origin
Arterial stainsresult when blood
leaves an arteryunder pressurefrom the heart
beating.
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This pattern shows two separate Points
of Origin, as indicatedby the two different
colors used to stringtrajectory.
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Sokkia 550 RXReflectorless
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Sokkia 550 RX Visual Statements EdgeFX
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Sokkia 550 RX Visual Statements EdgeFX
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Leica C-10Scanning Station
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Progression to 3D ScanningLeica C-10
Scanning Station
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Leica C-10Scanning Station
• Large amount of equipment to transport and carry
• Heavy so you must keep in mind who will be using it
•Need to break it down, move it, and rebuild it
•Scan time to resolution much longer
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So How Did We Get Here?
• The size of our county deemed it necessary to have more units, Homicide, CSI, and Traffic all needed
• Leica P-20 was coming out soon– Lieca wanted to give me a smoking hot deal on the
C-10
• We are a government entity and are required to get 3 bids
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So How Did We Get Here?
The Famous FARORepresentative
Matt Daly
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FARO Focus 3D 130
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FARO Focus 3D 130
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FARO Focus 3D 130
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FARO Focus 3D 130
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FARO Focus 3D 130
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FARO Focus 3D 130 Leica C-10
• Up to 976,000 points per/sec
•Takes less than half the time to get 10x the quality
•Weighs 11 lbs.
•Need paper or sphere targets
•Cost less
•Very easy to use at the front end and back end
• Up to 50,000 points per/sec
•Averages about 1 hour per scan
•Weighs about 30 lbs.
•Needs calibrated dual target pole•Paper targets, magnetic targets
•Cost more
•Very difficult to use at front and back end
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FARO Focus 3D 130 Leica C-10
• Can’t scan in a down pour
•Class 1 Laser•Phase Shift/Invisible
•130 meters
•SD camera card
•Cost less
•Very easy to use at the front end and back end
• You can scan in the rain
•Class 3R Laser•Pulsed/Green
•300 meters
•Internal hardrive
•Cost more
•Very difficult to use at front and back end
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FARO Focus 3D 130 Leica P-20
• Can’t scan in a down pour
•Class 1 Laser•Phase Shift
•Invisible
•130 meters•976,000 points/sec
•SD camera card
•Cost less
•Very easy to use at the front end and back end
• You can scan in the rain
•Class 1 Laser•Phase Shift
•Invisible
•120 meters•1 million points/sec
•Internal Hard Drive
•Cost way more
•Very difficult to use at front and back end
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FARO Focus 3D 130
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FARO Focus 3D 130
SBCSD Crime Scene Specialists
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Thank You
Lt. Donny MahoneySBCSD
Central Patrol909-522-7580