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Viewing 1 to 30 of 2617
2016-07-25 ...
  • July 25, 2016 (8:30 a.m. - 4:30 p.m.) - Troy, Michigan
Training / Education Classroom Seminars
It has not been commonly known that automotive exterior lights are safety devices and must comply with governmental regulations. Since the 1930s, the SAE Lighting Standards Committee has been actively working with the automotive industry OEMs, lamp makers, tier-two suppliers, and human factor experts to develop automotive lighting standards. These standards have been widely used or referenced by the U.S. federal or state governments in establishing and enforcing the lighting regulations.
2016-04-14 ...
  • April 14-15, 2016 (8:30 a.m. - 4:30 p.m.) - Detroit, Michigan
Training / Education Classroom Seminars
Since the invention of the automobile, lighting has been an important subsystem on all ground vehicles. Automotive lighting is vital to passenger safety, comfort and vehicle styling. The technology used in automotive lighting has rapidly expanded to make the lighting more value added, safer and pleasing to customers. This seminar provides broad information about automotive lighting systems with emphasis on lighting functions, effectiveness, and technologies. The intent is to assist attendees to gain sufficient knowledge about automotive lighting and its importance in overall vehicle design and development.
2016-04-13
Event
Visual perception continues to be a critical aspect of overall driver performance. This session welcomes paper offers highlighting new developments designed to provide better support for driver rearward vision, better understanding of how to measure light and its effects on drivers’ eyes, and better understanding of how drivers accomplish the visually difficult task of negotiating intersections.
2016-04-13 ...
  • April 13, 2016 (8:30 a.m. - 4:30 p.m.) - Detroit, Michigan
Training / Education Classroom Seminars
Lighting Emitting Diode (LED), a new generation semiconductor light source often referred to as Solid-State Lighting (SSL), has been broadly adopted in illumination, display, visualization, and other areas due to its higher efficacy and longer life. LEDs, first introduced for automotive interior applications such as indicators, expanded to exterior applications including center high mounted stop lamps and other automotive signal lighting devices. Today, LED technologies are being used for night vision, occupancy detection, and many other automotive application areas.
2016-04-12
Event
The scope of the Wiper System session encompasses the design, analysis and experiments related to windshield wipers and their associated components. Engineers and researchers in the field are encouraged to submit their innovative ideas and findings in empirical studies, numerical simulations as well as fundamental advancements dealing with material, mechanics, tribology, mechanism and heat transfer.
2016-04-12
Event
These papers highlight the interaction of driver vision - which is itself characterized by complexity, flexibility, and high levels of performance—with ever more sophisticated vision technologies to support driver vision. In particular, LED technology continued to advance in the past year, leading to broader lighting applications. Topics covered include lighting design strategy, lighting thermal management, driver fields of view, and characteristics of camera/display systems.
2016-04-12
Event
These papers highlight the interaction of driver vision - which is itself characterized by complexity, flexibility, and high levels of performance—with ever more sophisticated vision technologies to support driver vision. In particular, LED technology continued to advance in the past year, leading to broader lighting applications. Topics covered include lighting design strategy, lighting thermal management, driver fields of view, and characteristics of camera/display systems.
2016-04-05
Technical Paper
2016-01-1406
Rainer Neumann
Adaptive driving beam (ADB), which was first homologated in the ECE world (ECE 123) in 2012 has changed the automotive Front Lighting philosophy completely. Whereas we currently live with separate low beam and high beam features, also used in a combined way, we will have in the future a camera driven light distribution, which is a kind of modified high beam light pattern. ADB is a camera based lighting system, which enables the driver to achieve at night nearly high beam visibility without glaring oncoming or proceeding vehicles and road users. Once the presence of other vehicles is detected the headlamps change the light pattern and block the light where the oncoming or proceeding vehicles are located. The typical low beam light distribution with given and specified cutoff line will only be used in small speed areas. In US this development was well recognized and NHTSA is preparing a way to enable and approve the ADB systems with specific boundary conditions also for the US market.
2016-04-05
Technical Paper
2016-01-1407
Sama Hussein, Benjamin Hamilton, O. Remus Tutunea-Fatan, Evgueni Bordatchev
Retroreflective (RR) optical elements play a critical role in signalling, safety, and aesthetic/styling functionality of automotive lighting. The commonly used inverted-cube RR structures with hexagonal aperture have significant limitations that are primarily rooted in their manufacturing technique that involves complex assemblies/shapes of hexagonal pins and electroforms, particularly in case of freeform surfaces. This study introduces two new types of RR elements, namely: right triangular prism (RTP) and triangular pyramid. The mathematical/analytical models underlying these two new geometries were detailed as the intersection between a cube and a plane placed in a particular relative orientation with respect of each other. Following this, non-sequential optical simulation studies were performed using Zemax OpticStudio software.
2016-04-05
Technical Paper
2016-01-1408
John D. Bullough, Nicholas P. Skinner, Timothy T. Plummer
Although adaptive driving beam headlight systems are not presently defined in North American headlighting standards, evidence for the potential safety benefits of these systems is increasing. Field measurements of the photometric performance of an adaptive driving bean system were made in response to simulated headlight and tail light conditions. Roadway geometries were varied and multiple measurements for many conditions were made to assess repeatability of measurements. The results of the testing are summarized in the context of validating the likely safety impacts of these systems and of providing recommendations for standardized measurement conditions to ensure reliability.
2016-04-05
Technical Paper
2016-01-1351
Simhachalam Bade
Aluminum alloys are widely used in the transportation because of their high strength-to-weight ratio and outstanding capability in absorbing energy. In this paper, performance of bumper with crash tubes using aluminum alloy AA6061 and AA7003 materials is compared using numerical methods. Quasi-static test is simulated using the LS-DYNA implicit finite element program. Bumper and crash tubes are included in the finite element model. Symmetric Holes are provided in the crash tubes to initiate crushing. True stress-plastic strain curves from the tensile test are used in the static simulation. Displacement is applied to the bumper using Rigdwall geometric wall motion. The energy absorbed by bumper and crash tubes are compared. Dynamic simulation is done using LS-Dyna explicit program. True stress-true plastic strain curves at different strain rates from the literature is used in the dynamic simulation of AA7003 material to study the strain rate effects on impact behavior of tubes.
2016-04-05
Technical Paper
2016-01-1415
William T. Neale, James Marr, David Hessel
This paper presents a methodology for generating photo realistic computer simulation environments of nighttime driving scenarios by combining nighttime photography and videography with video tracking and projection mapping technologies. Nighttime driving environments contain complex lighting conditions such as forward and signal lighting systems of other vehicles, street lighting, and retro reflective markers and signage. The high dynamic range of nighttime lighting conditions make modeling of these systems difficult to render realistically. Photography and video, especially when using high dynamic range imaging, can produce realistic representations of the lighting environments, but without a computer generated environment, the scenarios that can be represented are limited to the specific scenario recorded.
2016-04-05
Technical Paper
2016-01-1411
Sangmin lee, Donghwa Shin, Jongseok Park, Ng Eng Chong, Fabrizio Cortigiani, Youngjae Choi
LED in automotive rear combination lighting (RCL) is becoming widely used in high end to mid class segment car. This is mainly fuelled by the strong influence of styling and requirement of a compact design. With OEMs competing to provide higher value to the customers such as longer warranty and advanced diagnostic features, the topic of semiconductor integration is becoming significant. Integration is a key to enable small form factor, high robustness and implementation of advanced technical functionality in the LED driver. However, the cost of implementing an integrated driver, if not partitioned effectively, will be much higher than the discrete solution. Therefore, it is important to implement the cost optimization strategy right from the conceptualization of the LED driver integrated device. In the beginning of this paper, the LED driving concept that is commonly used in the RCL lighting such as linear current sources and switching supply discussed.
2016-04-05
Technical Paper
2016-01-1410
Stefan G. Grötsch, Morten Brink, Roland Fiederling, Thomas Liebetrau, Ingo Möllers, Jörg Moisel, Hermann Oppermann, Alexander Pfeuffer
The technology for ADB/AFS systems is facing a transition to addressable LED arrays. ADB concepts today on the market use single row and multi row solutions. The “µAFS” consortium funded by the German Ministry of Research and Education consisting of Daimler, Hella, OSRAM SP and OS, Fraunhofer IZM and IAF and Infineon wants to go one step further. By hetero integration of a LED Chip providing 256 pixels with an intelligent driver IC, a building block for high resolution ADB/AFS light sources with more than 1000 pixels is realized. New headlamp design and optic solutions can be adapted to this illumination source with a pixel size in the range of 0.1 mm. In parallel the electronic infrastructure on the lamp and vehicle side is redefined to deal with the communication requirements coming along with high pixel numbers. New processing concepts create adaptive high resolution light patterns in real time and allow the car integration.
2016-04-05
Technical Paper
2016-01-1417
Toshinao Fukui, Kazuhiko Nakamoto, Hiroyuki Satake
Recently, head up displays (HUD) have become a common visual feedback device of advanced technologies as the HUD can display feedback to the driver in a highly visible area. However, a reflection to front windshield is often caused by the outline (mikiri line) of the HUD unit on the dash board when the dash board is in direct sun light. The reflection can lead to driver annoyance on an asphalt road as well as dark view in front of windshield. In certain conditions of the front view, location and thickness, and contrast of the outlines were considered as factors impacting annoyance. These factors were considered to contribute to the visibility of stripe pattern (a contrast sensitivity function). In addition, since the reflection of the outlines can be enhanced by bright sunlight coming to the dash board, the present study considered high illuminance on the dash board as an environmental factor. This additional factor was not considered in the past study.
2016-04-05
Technical Paper
2016-01-0022
Kenta Morishima, Shigeru Thomas Oho, Satoshi Shimada
A virtual power window control system was built in order to look into and demonstrate applications of microcontroller models. A virtual ECU simulated microcontroller hardware operations and executed step-by-step its control program in binary digital code. Thus, production-ready codes of ECUs are of primary interest in this research. The mechanical system of the power window, the DC motor to lift the window glass, the H-bridge MOSFET drivers, and the current sensing circuit to detect window locking are also modeled. This means that the hardware system of the control system was precisely modeled in terms of mechanical and circuit components. By integrating these models into continuous and discrete co-simulation, the power window control system was analyzed in detail from the microscopic command execution of the microcontroller to the macroscopic motion of the window mechanism altogether.
2016-04-05
Technical Paper
2016-01-1420
Shinichi Kojima, Shigeyoshi Hiratsuka PhD, Nobuyuki Shiraki, Kazunori Higuchi, Toshihiko Tsukada PhD, Keiichi Shimaoka, Kazuya Asaoka, Sho Masuda, Kazuhiko Nakashima
The purpose of this study is to develop the projection pattern which is capable to shorten the driver’s perception time to night pedestrian than illuminating only high beam. Our approach is based on spatio-temporal frequency characteristics of human vision. Visual contrast sensitivity is dependent on spatio-temporal frequency, and maximum contrast sensitivity frequency is adapted by environmental luminance. Conventionally, there are some applications of spatio-temporal frequency characteristics of human vision such as NTSC television format. These were applied the low sensitivity of visual characteristics. By contrast, our approach applies the high sensitivity of visual characteristics. On the assumption that higher contrast sensitivity of spatio-temporal frequency is correlated with shorter perception time, we conducted an experiment to determine the frequency of maximum contrast sensitivity under lighting conditions that simulate night time light levels.
2016-04-05
Technical Paper
2016-01-1414
Shigeyoshi Hiratsuka PhD, Shinichi Kojima, Nobuyuki Shiraki, Kazunori Higuchi, Toshihiko Tsukada PhD, Keiichi Shimaoka, Kazuya Asaoka, Sho Masuda, Kazuhiko Nakashima
We investigated a lighting method supporting driver's pedestrian perception that makes active use of visual characteristics such as the spatio-temporal frequency of contrast sensitivity. Using reasonable parameter values derived from preliminary experiments with a Campbell-Robson chart, we realized a suitable lighting pattern to improve the performance of driver's pedestrian perception. To assess the influence of visual characteristics on a reaction-time-dependent task such as pedestrian perception in nighttime, tests in the target environment were executed, the results of which validated the proposed method. From the preliminary experiments, the following were determined to be reasonable parameter values: 5 Hz for temporal frequency and 1.0 cycle/degree for spatial frequency.
2016-04-05
Technical Paper
2016-01-1595
Haibo Wu, Jiangbin Zhou, Qian Chen, Gongwen Liu, Chaoqun Qian
In this paper we present the work which was done at Shanghai-VW for using computational aero-acoustic (CAA) simulation in the vehicle development process to assess and improve the buffeting behavior of a vehicle when the rear side window is open. In the first step, a methodology was established and validated against wind tunnel tests using a Sedan. The methodology consists of a calibration of the CAA model to represent the properties of the cabin interior of the real car in terms of damping, wall compliance and leakage followed by CAA simulations of the full vehicle at different wind speeds to obtain the transient flow field around the exterior shape and inside the passenger compartment. The interior noise spectra are directly calculated from the transient pressure inside the cabin.
2016-04-05
Technical Paper
2016-01-1409
J. Christopher Watson, Gennady Dumnov, Alexander Muslaev, Andrey Ivanov, Svetlana Shtilkind
Condensation occurrence in automotive headlights can be detrimental to consumer acceptance of a product. This paper describes a technique for transient numerical simulation of liquid film formation on surfaces during lighting thermal analysis performed using Computational Fluid Dynamics (CFD), including how the film’s properties influence the thermal solution. The numerical technique presented accounts for the change in the film thermal state and thickness due to heat exchange with external fluid flow and solid bodies, surface evaporation/condensation, melting/crystallization within the film volume, and its motion due to gravity and friction forces from the surrounding airflow.
2016-04-05
Technical Paper
2016-01-1454
Libo Dong, Stanley Chien, Jiang-Yu Zheng, Yaobin Chen, Rini Sherony, Hiroyuki Takahashi
Pedestrian Automatic Emergency Braking (PAEB) for avoiding/mitigating pedestrian crashes has been equipped on some passenger vehicles. One of the important components in the PAEB evaluation is the development of standard testing at night. The test facility should include representative low-illuminance environment to enable the examination of the sensing and control functions of different PAEB systems. The goal of this research is to characterize and model light source distributions and variations in the low-illuminance environment and determine possible ways to reconstruct such an environment for PAEB evaluation. Previously, the development of lighting system for PAEB Testing is based only on ANSI/IESNA RP-8-00, which define the average illuminance level and light uniformity of the lighting requirement in US roadway lighting design. This approach is intrinsic and cost effective, but lacks of real lighting characteristic in urban area.
Viewing 1 to 30 of 2617

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