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Heartbeat Detection Technology for Monitoring Driver’s Physical Condition

Aisin Seiki Co., Ltd.-Kento Tsuchiya, Kenta Mochizuki
Keio University-Tomoaki Ohtsuki, Kohei Yamamoto
  • Technical Paper
  • 2020-01-1212
To be published on 2020-04-14 by SAE International in United States
In recent years, the number of reported traffic accidents due to sudden deterioration in driver’s physical condition has been increasing, it is expected to develop a system that prevents accidents even if physical condition suddenly changes while driving, or reduces damage through vehicle body control. For this purpose, it is necessary to detect sudden changes of the driver’s physical condition, and research is being conducted widely. Among them, it is reported that some of such changes may appear in the heartbeat interval. In other words, by acquiring the driver’s heartbeat interval in real time, it may be possible to detect the sudden changes, and reduce traffic accident. Even if a traffic accident occurs, the damage can be reduced by emergency evacuation immediately after detecting sudden changes. Therefore, we focused on the technology to detect the heartbeat interval with 24GHz microwave Doppler radar, which can detect heartbeat non-contactly while maintaining the interior design and passenger’s privacy. Doppler radar with microwave is sensitive enough to detect heartbeat, however vibration noise is also superimposed on the sensor signal…
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The Effect of Obesity on Rollover Ejection and Injury Risks

Exponent Inc.-Chantal Parenteau, Janine Smedley, Michael Carhart, Alan Dibb
  • Technical Paper
  • 2020-01-1219
To be published on 2020-04-14 by SAE International in United States
Obesity rates are increasing among the general population. This study investigates the effect of obesity on ejection and injury risk in rollover crashes through analysis of field accident data contained in the National Automotive Sampling System-Crashworthiness Data System (NASS-CDS) database. The study involved front outboard occupants of age 15+ years in 1994+ model year vehicle rollover crashes. Complete and partial ejection risks were first assessed seating location relative to roll direction and belt use. The risk of serious-to-fatal injuries (MAIS 3+F) in non-ejected occupants were then evaluated. Occupants were sorted into two BMI groups, normal (18.5 kg/m2 ≤ BMI <25.0 kg/m2) and obese (BMI ≥30 kg/m2). The overall risk for complete ejection was 2.10% ± 0.43% when near-sided and 2.65% ± 0.63% when far-sided, with a similar risk for both the normal and obese BMI groups. Complete ejection was uncommon for belted occupants with a risk of 0.2% or less for all groups. The risk of partial ejection was greater for obese compared to normal BMI occupants. For near-side occupants, the overall risk of partial…
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Flight Deck Interior Doors for Transport Aircraft

S-7 Flight Deck Handling Qualities Stds for Trans Aircraft
  • Aerospace Standard
  • ARP4101/8A
  • Current
Published 2020-02-18 by SAE International in United States
This document recommends criteria for standardizing flight deck interior doors and their operation to optimize their use under normal and emergency conditions.
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Experimental Study of Aerodynamic Drag Control on Bluff Body using Synthetic Jets

Utsunomiya University-Naoto Kato, Shunsuke Watanabe, Hiroaki Hasegawa
  • Technical Paper
  • 2019-32-0538
Published 2020-01-24 by Society of Automotive Engineers of Japan in Japan
Since flow separation causes increase of the drag on bluff bodies, its control method has been studied for many years. Active control methods are currently focused as an alternative to passive ones because they impose a larger drag penalty under certain conditions. Although the effectiveness of a steady jet using suction, blowing or pulsed jets has been demonstrated, it is difficult to obtain an effect commensurate with weight increase because the mechanism is complicated.One method of solving this problem is a synthetic jet. Synthetic jets are produced by periodic ejection and suction of fluid from an orifice induced by oscillation of a diaphragm inside a cavity. Small engine powered vehicles demand less drag, a compact package and light weight because the drivers expect fuel efficiency, load capacity and economy. Synthetic jets can supply them because they contribute drag reduction and require only simple components.In this study, the influence of synthetic jets on the drag of a simple bluff body representing a road vehicle is measured. Drag measurement was performed by varying synthetic jet parameters: jet…
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FAA/EASA Certification, Methods of Compliance for 29.801 Ditching

  • Professional Development
  • C1970
Published 2019-10-08

Certifying an aircraft, part or appliance can be a challenge.  The FAA/EASA procedures can be frustrating and a maze of rules, policy and guidance. Understanding the process and procedures can provide you with a competitive edge and reduce your time obtaining a Certification approval. This course provides an overview of the Federal Aviation Administration (FAA) and European Aviation Safety Agency (EASA) policies, guidelines and requirements leading to Type and Supplemental Type airworthiness approvals. This course has a focus on 29.801 Ditching and EASA 29.802 Emergency Flotation.

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Heat Transfer Enhancement in Stagnation Region of Aero-Engine Inlet Vanes due to Ejection Slot and Anisotropic Heat Conduction

AECC Commercial Aircraft Engine Co., Ltd-Kun Yang, Hongkui Zhou
Beihang University-Peng Ke, Jie Liu, Lukas Schaeflein
Published 2019-06-10 by SAE International in United States
Ice protection is important for aero-engine induction system, such as the inlet vanes. For the ice protection of such parts manufactured with low thermal conductivity polymer-based composite material, the combined heating method using interior jet impingement and exterior ejection film has certain advantages. The simulation model coupling CFD with solid heat conduction was developed and solved with the anisotropic thermal conductivities model to investigate the heat transfer enhancement in the stagnation region of aero-engine inlet vanes due to ejection slot and anisotropic heat conduction, which is related to the curved geometry, ejection slots and anisotropic heat conduction.The temperature distribution and heat flux ratio between the stagnation region on outside surface and the impingement region inside were calculated and analyzed for the configuration with different ejection angle and different materials. The results show that ejection slots and anisotropic heat conduction plays important roles of the heat transfer process. For the same ejection angles, the larger the thermal conductivity, the higher the temperature at stagnation point and the better ice protection. For the same material property, the…
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Aero-Engine Inlet Vane Structure Optimization for Anti-Icing with Hot Air Film Using Neural Network and Genetic Algorithm

Beihang University-Jie Liu, Peng Ke
Published 2019-06-10 by SAE International in United States
An improved anti-icing design with film heating ejection slot and cover for the inlet part of aero-engine was brought out, which combines the interior jet impingement with the exterior hot air film heating and shows promising application for those parts manufactured with composite materials. A hybrid method based on the combination of the Back Propagation Neural Network (BPNN) and Genetic Algorithm (GA) is developed to optimize the anti-icing design for a typical aero-engine inlet vane in two dimensions. The optimization aims to maximize the heating performance of the hot air film, which is assessed by the heating effectiveness. The film-heating ejection angle and the cover opening angle are the two geometric variables to be optimized. Numerical model was established and validated to generate training and testing samples for BPNN, which was used to predict the objective function and find the optimal design variables in conjunction with the GA. The optimal values of the film-heating ejection angle and the cover opening angle were 24.3° and 5°, respectively, which were achieved at a given heat flow rate…
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Wearable Devices Allow Direct Communication by Touch

  • Magazine Article
  • TBMG-34155
Published 2019-04-01 by Tech Briefs Media Group in United States

Emergency situations such as trying to escape heavy smoke from fire could leave the sense of touch as the only way to find an exit. Rather than trying to look at a smartphone screen, a smartwatch — alerted by the same alarms — begins “speaking” through the wearer’s skin, giving directions with coded vibrations, squeezes, and tugs with meanings as clear as spoken words. In other scenarios, a surgeon or a pilot might find it useful to have another channel of communication.

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Emergency Portability of Slide/Rafts

S-9A Safety Equipment and Survival Systems Committee
  • Aerospace Standard
  • ARP5252A
  • Current
Published 2019-03-18 by SAE International in United States
This SAE Aerospace Recommended Practice (ARP) recommends design features for facilitating relocation of portable slide/rafts for deployment at an alternate exit under ditching conditions.
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Aircraft Parachute Recovery Systems

  • Magazine Article
  • TBMG-33761
Published 2019-02-01 by Tech Briefs Media Group in United States

BRS Aerospace South St. Paul, MN 651-457-7491