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Behavior of 3-axis conformal proximity sensor arrays for restraint-free, in-vehicle, deployable safety assistance

Publication Type : Journal Article

Publisher : Journal of Intelligent and Fuzzy Systems

Source : Journal of Intelligent and Fuzzy Systems, IOS Press, Volume 36, Number 3, p.2085-2094 (2019)

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Keywords : Accidents, ADAS, Capacitive electrodes, Capacitive proximity sensors, capacitive sensors, Crash test dummies, Crashworthiness, Curve fitting, Curve fitting technique, Discrete distances, Electrodes, Infrared detectors, Intelligent systems, Localization, Prototype hardware, Proximity sensors, Risk perception, Roofs, Soft computing, Ultrasonic applications

Campus : Coimbatore

School : Department of Electronics and Communication Engineering, School of Engineering

Department : Electronics and Communication

Year : 2019

Abstract : Real-time occupant posture tracking information has significant value in ADAS equipped vehicles to enable better safety and mitigate risks of injuries to occupants within vehicular cabin during sudden deceleration due to abrupt braking maneuvers or crash scenarios. This information will be helpful for timely activation of airbags and various other conventional safety restraints that provide safety and mitigate injuries. Here, a proximity sensing system is proposed that uses capacitive electrodes to acquire the occupant posture and motion data. These electrodes are deployed as an array placed along three orthogonal sensing axes such as in the seats, along the roof and dashboard, and along the door panel. Motion detection cameras and other sensors like ultrasound or infrared sensors have line of sight issue, while the accumulation of dirt would become a problem for sensing the data accurately. A prototype hardware has been implemented and the proximity capacitance data was acquired for discrete distances from 0.1 to 0.8 m, in the three electrode orientations. Applying optimization and curve fitting techniques on this data, derived data sets were then obtained, that mimic a typical crash-test dummy behavior during impact. The resultant algorithm can offer a precise localization estimate of the occupant with respect to an electrode layout along the roof, seat and door orientations, and hence classify the occupant posture inside the vehicular cabin. © 2019 - IOS Press and the authors.

Cite this Research Publication : K. K. Vamshi Durgam and Sundaram, G. A. Shanmugha, “Behavior of 3-axis conformal proximity sensor arrays for restraint-free, in-vehicle, deployable safety assistance”, Journal of Intelligent and Fuzzy Systems, vol. 36, pp. 2085-2094, 2019.

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