Rollover

About: Rollover is a research topic. Over the lifetime, 3166 publications have been published within this topic receiving 33077 citations.

Vehicle crash data recorder

Abstract: A vehicle data recorder useful in recording and accessing data from a vehicle accident comprised of; a microprocessor based system that will have in the preferred embodiment four inputs from the host vehicle, and four inputs from the internal sensors. The apparatus is arranged with a three-stage memory to record and retain the information and is equipped with a series and parallel connectors to provide instant on scene access to the accident data. This invention includes a plurality of internally mounted devices necessary to determine vehicle direction, rollover detection, and impact forces. The plurality of inputs from the host vehicle include in the preferred embodiment, the speed of the vehicle, seat belt use, brake activation, and whether or not the transmission is in forward or reverse gear.

Rollover crash tests - the influence of roof strength on injury mechanics. in: occupant and vehicle responses in rollovers

Abstract: There has been ongoing research and discussion regarding the effect of roof strength on rollover protection since the 1950s. This chapter on the influence of roof strength on injury mechanics is from a comprehensive text on occupant and vehicle responses in rollovers. In this chapter, the authors report on a series of eight lateral dolly rollover tests that were conducted on 1983 Chevrolet Malibus at a speed of 32 mi/h (51.5 km/h). Four of the vehicles had rollcages; four had standard production roofs. Numerous cameras documented the vehicle and Hybrid III dummy movements during the tests. Results showed that, for both roof structures, the dummies moved upward and outward from their seats due to rotation and acceleration of the vehicle. High head/neck loads were measured when the head contacted a part of the car experiencing a large change in velocity (often that part of the car that struck the ground). The authors conclude that roof strength is not an important factor in head/neck injuries in rollover accidents for unstrained occupants. In addition, there was no significant difference in the occupant kinematics between standard and rollcaged vehicles. However, the vehicles with rollcages had less glass breakage. The chapter includes extensive appendices that reproduce photographs from each of the 8 tests.

Vehicle safety system with safety device controllers

Abstract: A vehicle safety system has a plurality of safety device controllers (200) for controlling safety devices such as airbag assemblies, seat belt tensioner assemblies, fuel cutoff switch assemblies, battery disconnect switch assemblies, assemblies for sending notification to emergency services, and assemblies for sending vehicle location data. The system accepts data from other vehicle systems such as speed data from the antilock brake system to distinguish between a low speed and a high speed crash, seat occupancy data to selectively activate airbags, and steering system and acceleration data to detect vehicle rollover conditions. The system provides for fault detection and notification to the vehicle operator, as well as immunity from electromagnetic interference through the use of distributed controllers that communicate with a central electronic control unit (300) over digital communication bus (500) using coded commands and data. Each controller has the capability of performing self-tests and communicating the results to the central electronic control unit.

Effects of shoe heel height on biologic rollover characteristics during walking.

Abstract: This study investigated the effects of shoe heel height on the rollover characteristics of the biologic ankle-foot system. Ten nondisabled adult female volunteers walked using three pairs of shoes with varying heel heights and at three walking speeds with each pair of shoes. Kinematic and kinetic data needed to calculate the rollover shapes of the ankle-foot systems of the participants were collected. Rollover shapes are the effective rocker geometries that ankle-foot systems conform to between heel contact and opposite heel contact. Parameters of the best-fit circular arcs to the rollover shapes were used in an examination of the effects of shoe heel height on the ankle-foot system. The results support the notion that nondisabled humans automatically adapt their ankle-foot systems to accommodate a range of shoe heel heights, resulting in rollover shapes that do not change appreciably. Given physiologic constraints, this adaptation may not be possible for very high heels.