Daniel W. Vomhof III
Presentation Materials for
Download Recon-3D & Cloud Compare Presentation - 1 Slide per page
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Cloud Compare Instructional Videos Movies - No Sound - Of Mouse Movements and Screen Menu Commands/Key Strokes Please note that the videos may take some time to download Video 1 - Trim, Align, and Scale Pre Test (Exemplar) Vehicle Video 2 - Trim, Align, and Scale Post Test Vehicle Video 3 - Overlay Exemplar on Crushed Vehicle Video 4 - Get a Crush "Slice" for Crush Measurements Video 5 - Get Crush Measurements |
Background Presentations on Recon-3D and Cloud Compare -
The following two presentations are provided with the Author's permissions
Recon-3D vs Faro 3D Scanner and the Cloud Compare Comparisons of the Results by Patrick Davis
iPhone and iPad LiDARScanner for Evidence Documentation by Robert Wyman
Download Crush Analysis Considerations Presentation - 1 Slide per page
Additional Materials
Please note that the videos may take some time to download
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Download Excel Spreadsheet with Crush Calculations
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SCARS 2022 Crash Test 1
Download Video 12 - Angled Overhead |
SCARS 2022 Crash Test 2
Download Video 22 - Angled Overhead |
SCARS 2022 Crash Test 3
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Web site References Cloud Compare https://www.danielgm.net/cc/release/index.html
Precision vs Accuarcy The Science of Measurement: Accuracy vs. Precision
Practices of Science: Precision vs. Accuracy
What is the meaning of accuracy and precision in Science?
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In addition to the Presentation material, 4 Crash Tests were conducted at the Conference.
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Crash Test 1 The first test featured an 18000 pound school bus traveling at a speed of ~ 28 mph into the rear of a Dodge Charger, driving the front of the Charger into as tree ....
The "scenario" is a vehicle pulled off to the side of a road, stopped in the shade of a tree, to check directions ... or perhaps catch a nap.
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Crash Test 2 As part of the July 2023 Conference, tests 2 & 3 were designed as a series. The purpose was to see if the damage caused in the first crash in the series could be seperated from the dmage caused by the second crash in the series.
The scenario is as follows - Bus stop with its rear end hanging out into the travel lane of a cross street. This could be due to a ped crossing in front of the bus, or perhaps the driver stopped early to let some kids out.
Impala into Rear axle of School Bus
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Crash Test 3 As part of the July 2023 Conference, tests 2 & 3 were designed as a series. The purpose was to see if the damage caused in the first crash in the series could be seperated from the dmage caused by the second crash in the series. Test 3, the second impact in the series, is the Dodge Charger into the rear of the Chevrolet Impala .... and again, this is supposed to be a "bam-bam" series .... where the Dodge Charger was following too closely behind to avoid the (secnd) impact into the rear of the Impala. Charger into Impala into Rear axle of School Bus
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Crash Test 4 For the last test in the July 2023 series .... it was a simple car travelling too fast for the curve and "straightens" the curve impacting the tree near the edge of the roadway.
Note the lack of damage to the tree.
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The Expert VIN DeCoder and Expert AutoStats for the 3 Dodge Chargers and the Chevrolet Impala involved in the crash testing for the SCARS 2023 conference is available from the following link. 4N6XPRT Systems data sheets for the Crash Test Vehicles
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Often times people ask "How accurate are the weights in Expert AutoStats?" the weight comaprison of the weights in Expert AutoStats compared to the actual weights of the crash test vehicles can be downloaded from the following link. Some of the factors that go into weight differences are - trim, engine, fuel tank size, "junk in the trunk",and even an extra coat of paint. Weight comparison - Expert AutoStats weights compared to Acutal weights of vehicles
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4N6XPRT Systems Conference Material and Presentations Page