A low-cost test rig for impact experiments on a dummy head

Alhaddad, Ahmad Yaser; Cabibihan, John-John; Hayek, Ahmad; Bonarini, Andrea

doi:10.1016/j.ohx.2019.e00068

Cited by 6 publications

(6 citation statements)

References 22 publications

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“…Finally, the peak head acceleration for each experiment was calculated based on a MATLAB script. More detailed procedures can be found in our earlier studies [2,4,6,7].…”

Section: Methodsmentioning

confidence: 99%

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Influence of the shape and mass of a small robot when thrown to a dummy human head

et al. 2019

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Social robots have shown some efficacy in assisting children with autism and are now being considered as assistive tools for therapy. The physical proximity of a small companion social robot could become a source of harm to children with autism during aggressive physical interactions. A child exhibiting challenging behaviors could throw a small robot that could harm another child's head upon impact. In this paper, we investigate the effects of the mass and shape of objects thrown on impact at different velocities on the linear acceleration of a developed dummy head. This dummy head could be the head of another child or a caregiver in the room. A total of 27 main experiments were conducted based on Taguchi's orthogonal array design. The data were then analyzed using ANOVA and then optimized based on the signalto-noise ratio. Our results revealed that the two design factors considered (i.e. mass and shape) and the noise factor (i.e. impact velocities) affected the response. Finally, confirmation runs at the optimal identified shape and mass (i.e. mass of 0.3 kg and shape of either cube or wedge) showed an overall reduction in the resultant peak linear acceleration of the dummy head as compared to the other conditions. These results have implications on the design and manufacturing of small social robots whereby minimizing the mass of the robots can aid in mitigating the potential harm to the head due to impacts.

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“…Finally, the peak head acceleration for each experiment was calculated based on a MATLAB script. More detailed procedures can be found in our earlier studies [2,4,6,7].…”

Section: Methodsmentioning

confidence: 99%

“…The impact setup has been shown to give similar results to that of related studies. More indepth details about the experimental setup and validation can be found in our earlier studies [2,4,6,7]. Fig.…”

Section: Impact Setupmentioning

confidence: 99%

Influence of the shape and mass of a small robot when thrown to a dummy human head

et al. 2019

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“…The repository link contains six different datasets for the acceleration data [1] . The datasets are about participants (i.e., adults and children) performing different unwanted interactions with three different toys.…”

Section: Data Descriptionmentioning

confidence: 99%

Datasets for recognition of aggressive interactions of children toward robotic toys

2021

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“…Thus, cameras that can achieve framerates into the low thousands are useful in a wide range of applications that require up to millisecond or sub-millisecond time resolutions. A recent proposal for a low-cost test set-up for impact experiments on dummy heads suggested framerates equal to or above 200 fps [2]. Tests were also done on the free-fall drop impact of portable products at 1000 fps [3] and automotive crash testing cameras typically run between 1000-4000 fps to meet automotive safety compliance standards [45].…”

Section: General Applicationsmentioning

confidence: 99%

“…High-speed cameras have given us the ability to observe and analyze physical processes previously thought to be on timescales outside the realm of human comprehension. They are developed for machine vision applications [1] such as automatic inspection, used to conduct highspeed impact testing [2,3], and have allowed scientific research into the biomechanics of animals [4] and of humans in sports science [5], ballistics [6], and the broad field of fluid dynamics [7]. Unfortunately, commercial high-speed cameras can be a major investment.…”

Section: Introductionmentioning

confidence: 99%

Development of a low-cost, user-customizable, high-speed camera

et al. 2020

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High-speed imaging equipment can be an expensive investment, especially when certain applications require custom solutions. In this paper, we present a low-cost high-speed prototype camera built on a low-end Zynq-7000 System-on-Chip (SoC) platform and off-the-shelf components with the aim of removing the entry barrier into various high-speed imaging applications. The camera is standalone (does not require a host computer) and can achieve 211 frames per second (fps) at its maximum resolution of 1280x1024, and up to 2329 fps at a 256x256 resolution. With a current cost of only several hundred dollars and resource utilization of~5%, the open-source design's modularity and customizability allows users with sufficient hardware or programming experience to modify the camera to suit their needs, potentially driving the cost lower. This can be done by utilizing the large remaining programmable logic for custom image processing algorithms, creating user interface software on the CPU, attaching extensions through the peripheral Module connections, or creating custom carrier or daughter boards. The development and design of the camera is described and a figure-of-merit is presented to provide a value assessment of some available commercial high-speed cameras against which our camera is competitive. Finally, the camera was tested to record low frequency spatial vibration and was found to be useful in investigating phenotypes associated with aging in a leading animal model, the nematode (worm) Caenorhabditis elegans.

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A low-cost test rig for impact experiments on a dummy head

Cited by 6 publications

References 22 publications

Influence of the shape and mass of a small robot when thrown to a dummy human head

Influence of the shape and mass of a small robot when thrown to a dummy human head

Datasets for recognition of aggressive interactions of children toward robotic toys

Development of a low-cost, user-customizable, high-speed camera

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