Lightweight low-profile nine-accelerometer package to obtain head angular accelerations in short-duration impacts. J Biomech 2006;39(7):1347-54
Date
05/17/2005Pubmed ID
15893758DOI
10.1016/j.jbiomech.2005.03.016Scopus ID
2-s2.0-33646075480 (requires institutional sign-in at Scopus site) 62 CitationsAbstract
Despite recognizing the importance of angular acceleration in brain injury, computations using data from experimental studies with biological models such as human cadavers have met with varying degrees of success. In this study, a lightweight and a low-profile version of the nine-accelerometer system was developed for applications in head injury evaluations and impact biomechanics tests. The triangular pyramidal nine-accelerometer package (PNAP) is precision-machined out of standard aluminum, is lightweight (65 g), and has a low profile (82 mm base width, 35 mm vertex height). The PNAP assures accurate orthogonal characteristics because all nine accelerometers are pre-aligned and attached before mounting on a human cadaver preparation. The feasibility of using the PNAP in human cadaver head studies is demonstrated by subjecting a specimen to an impact velocity of 8.1 m/s and the resultant angular acceleration peaked at 17 krad/s2. The accuracy and the high fidelity of the PNAP device at high and low angular acceleration levels were demonstrated by comparing the PNAP-derived angular acceleration data with separate tests using the internal nine-accelerometer head of the Hybrid III anthropomorphic test device. Mounting of the PNAP on a biological specimen such as a human cadaver head should yield very accurate angular acceleration data.
Author List
Yoganandan N, Zhang J, Pintar FA, King Liu YAuthors
Frank A. Pintar PhD Professor in the Biomedical Engineering department at Medical College of WisconsinNarayan Yoganandan PhD Professor in the Neurosurgery department at Medical College of Wisconsin
MESH terms used to index this publication - Major topics in bold
AccelerationCadaver
Equipment Design
Equipment Failure Analysis
Head
Head Injuries, Closed
Head Movements
Humans
In Vitro Techniques
Miniaturization
Physical Stimulation
Reproducibility of Results
Sensitivity and Specificity
Stress, Mechanical
Transducers
