Image Analysis of Rollover Crash Tests Using Photogrammetry

Chou, Clifford C.; McCoy, Robert W.; Le, Jerry; Fenton, Stephen J.; Neale, William; Rose, Nathan A.

doi:10.4271/2006-01-0723

Cited by 19 publications

(5 citation statements)

References 14 publications

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“…The use of close-range photogrammetry has been validated for reconstructing the 3D geometry of vehicles [3,4,6,8,10,12,14,21,22,31,37,42]. While the cost of equipment is less and the equipment more portable compared to some of the aforementioned methods, traditional closerange photogrammetry requires extensive processing time, in which the analyst must manually identify and cross-reference desired point locations in multiple photographs in order to calculate points of interest.…”

Section: Traditional Photogrammetrymentioning

confidence: 99%

“…The comparison to total station survey methodology was selected as it is widely-accepted in the field of collision reconstruction and it often considered the "gold standard" for three-dimensional vehicle coordinate measurement. Traditional photogrammetry was selected because it has been validated for both general data capture and specific application to vehicle/scene documentation for collision reconstruction using photographs and postprocessing software [3,6,8,10,12,14,21,42]. Like photo-based 3D scanning, traditional photogrammetry can generate a single point cloud for the entire vehicle, thereby allowing direct comparison with the complete photo-based 3D scanning model of the vehicle.…”

Section: Purposementioning

confidence: 99%

See 1 more Smart Citation

The Accuracy of Photo-Based Three-Dimensional Scanning for Collision Reconstruction Using 123D Catch

Erickson¹,

Bauer²,

Hayes³

2013

SAE Technical Paper Series

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An experiment was conducted to examine the validity of freely available photo-based 3D scanning software for generating accurate 3D geometry of a vehicle. Currently, 3D vehicle geometry is routinely captured using total station survey equipment, coordinate measuring machines (CMM), laser scanning, or traditional point-based photogrammetry. While these methods produce sufficiently accurate results for collision reconstruction, they have limitations that can affect practical implementation. For example, manual surveying with a total station, CMM or traditional photogrammetry are all limited to the production of coordinate data at discrete, predefined points. In addition, total stations, CMMs and laser scanning devices are also expensive and require a significant amount of time in the field with the vehicle. In contrast, photo-based 3D scanning allows a 3D mesh to be created of a vehicle simply from a series of photographs using a consumergrade digital camera.

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Section: Traditional Photogrammetrymentioning

confidence: 99%

Section: Purposementioning

confidence: 99%

The Accuracy of Photo-Based Three-Dimensional Scanning for Collision Reconstruction Using 123D Catch

Erickson¹,

Bauer²,

Hayes³

2013

SAE Technical Paper Series

View full text Add to dashboard Cite

show abstract

“…The data from the site inspection was then used to create a scaled diagram of the accident site. The site data was supplemented with photogrammetric analysis 2,3,4,5,6,7,8 of the photographs taken shortly after the accident. Figure 2 depicts an example of the author's photogrammetry analysis.…”

Section: Accident Sitementioning

confidence: 99%

Forensic Engineering Analysis of a Wheel Spindle Failure Due to Pre-Load and Fatigue

Danaher¹

2021

JotNAFE

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Typically, most vehicles equipped with non-powered wheels use a spindle that not only supports the weight of the vehicle but also allows the rotation of the tire. The rotation of the hub and wheel on the spindle is accomplished with the use of either a tapered or double row ball bearing. Bearings are mounted between the spindle and hub/wheel assembly, then secured with a castle nut set to a specified torque. Tapered bearings are chosen for this application because they are designed for applications where forces are generated radially (vertically) and axially (laterally) during use. Although tapered bearings are ideally suited for use in wheel and spindle assemblies, they must be installed properly to perform as designed. As part of that installation, the spindle nut must be properly torqued in order to apply a sufficient pre-load to the tapered bearings. Without the proper pre-load, the bearings can either generate too much friction or ride improperly on the spindle, generating forces that are not properly distributed. This paper will discuss the failure of a spindle and wheel assembly that experienced fatigue due to improper pre-load of the spindle nut.

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“…For the second analysis method developed in this research, we analyzed the post-impact speed of the target vehicles by determining the change in position of the vehicle between specific frames of the DriveCam video. In conducting this analysis, we used a photogrammetric method known as camera reverse projection or camera-matching [4,5]. Completing this photogrammetric analysis involved the following steps: 3.…”

Section: Target Vehicle Analysismentioning

confidence: 99%

Using Data from a DriveCam Event Recorder to Reconstruct a Vehicle-to-Vehicle Impact

Rose¹,

Carter²,

Pentecost³

et al. 2013

SAE Technical Paper Series

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This paper reports a method for analyzing data from a DriveCam unit to determine impact speeds and velocity changes in vehicle-to-vehicle impacts. A DriveCam unit is an aftermarket, in-vehicle, event-triggered video and data recorder. When the unit senses accelerations over a preset threshold, an event is triggered and the unit records video from two camera views, accelerations along three directions, and the vehicle speed with a GPS sensor. In conducting the research reported in this paper, the authors ran four front-to-rear crash tests with two DriveCam equipped vehicles. For each test, the front of the bullet vehicle impacted the rear of the stationary target vehicle. Each of the test vehicles was impacted in the rear twice-once at a speed of around 10 mph and again at a speed around 25 mph. The accuracy of the DriveCam acceleration data was assessed by comparing it to the data from other in-vehicle instrumentation. We found that, for inline front-to-rear crashes like those tested in this paper, the video, GPS and acceleration data reported by the DriveCam systems is useful for reconstructing crashes, provided that the reconstructionist accounts for potential limitations in the data.

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Image Analysis of Rollover Crash Tests Using Photogrammetry

Cited by 19 publications

References 14 publications

The Accuracy of Photo-Based Three-Dimensional Scanning for Collision Reconstruction Using 123D Catch

The Accuracy of Photo-Based Three-Dimensional Scanning for Collision Reconstruction Using 123D Catch

Forensic Engineering Analysis of a Wheel Spindle Failure Due to Pre-Load and Fatigue

Using Data from a DriveCam Event Recorder to Reconstruct a Vehicle-to-Vehicle Impact

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