Active safety
JARI, centering on its active safety group, analyzes causes of accidents in relation to human,
vehicle and road factors as part of its study on accident prevention measures and systems.
Currently JARI is engaged in the investigation of driver’s visual field and visibility, driving behavior,
accident generation mechanisms, driver support technology.
At a time when automatic emergency braking and other active safety technologies are being commercialized,
we need to examine the effectiveness of these technologies.
Accident generation mechanisms
Making use of accident statistics, accident on-site data and driving recorder data on near miss cases, JARI analyzes background factors and accident causing factors, and replicates typical accident and near miss scenes on the mock roads to examine accident generation mechanisms and to identify effective accident prevention measures.
Driver characteristics
We at JARI examine drivers’ behaviors in normal traffic situations and their abilities to avoid an accident at a sudden dangerous situation.
We attempt to classify driving action patterns of the elderly driver group which exhibits widening individual differences in driving ability.
Research into driver characteristics
Driving action is comprised of a chain reaction of recognition, judgment and operation. In the area of the driver’s recognition, for example, we investigate the visual search function, information processing abilities and risk avoidance operations of drivers.
Driver interface
Due to the increasing use of advance technologies in automobiles,
it has become possible to supply a greater amount of information to drivers.
JARI is accordingly researching appropriate methods of information supply, onboard image display,
warning functions which will ensure greater safety and greater convenience.
Experiment on onboard display assessment methods
Simulation of diverse running situations by a 360-degree spherical screen and a rocking device
In 2009 JARI acquired a new driving simulator to execute a great variety of experiments and assessment tests targeted primarily at active safety for the reduction of traffic accidents.
This simulator is equipped with a 360-degree spherical screen to show wide-angle video images and with a rock device consisting of a hexapod and turntable for the simulation of
realworld road running conditions.
The cabin, measuring instruments, software programs of the simulator are replaceable so as to suit diverse testing needs.
Omnidirectional-vision driving simulator
Specification
| Steering wheel | Accel／ brake pedals |
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|---|---|---|---|---|
| Manipulative reaction system (AC servo motor drive) |
Steering wheel | Rated torque:10 Nm (instantaneous max value: 33 Nm) Rated angular velocity:3.4 rad/s (instantaneous max value: 17.9 rad/s) |
Accel／ brake pedals |
Rated thrust:480 N (instantaneous max value: 1,450N) Rated velocity:1 m/s (instantaneous max value: 1.5 m/s) |
| Screen | Projector | Full-perimeter video performance (measured values) |
||||
|---|---|---|---|---|---|---|
| Video display system |
Screen | Spherical screen:Diameter 8m Sight distance:Approx. 3.7m(eye-point height) Viewing angle:Horizontal 360°×Vertical 65° |
Projector | Full-perimeter video:Full-spec Hi-Visionprojector x 12 units Door mirror video:SXGA＋ Projector × 2units (Rt, Lt) Room mirror video:WXGA Plazmadisplay×1unit |
Full-perimeter video performance (measured values) |
Image resolution:4.67 minute／OLP （eye point） Ave. brightness:53.3 cd/m2（amp power 70%） Ave. contrast ratio:8.86：1 |
| Movable range | Max speed/ angular velocity (instantaneous max value) |
Max acceleration/ angular accel. (instantaneous max value) |
||||
|---|---|---|---|---|---|---|
| 6-axis rocking system | Movable range | X ： ±300 mm ROLL ： ±12° Y ： ±300 mm PITCH ： ±12° Z ： ±300 mm YAW ： ±12 ° |
Max speed/ angular velocity (instantaneous max value) |
X ： ±700 mm/s ROLL ： ±20°/s Y ： ±700 mm/s PITCH ： ±20°/s Z ： ±600 mm/s YAW ： ±20°/s |
Max acceleration/ angular accel. (instantaneous max value) |
X ： ±0.4 G ROLL ： ±110°/s2 Y ： ±0.4 G PITCH ： ±110°/s2 Z ： ±0.4 G YAW ： ±110°/s2 |
| Movable range | Max angular velocity (instantaneous max) |
Max angular acceleration (instantaneous max) |
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|---|---|---|---|---|---|---|
| Yaw rotation device | Movable range | ±300° | Max angular velocity (instantaneous max) |
±60°/s | Max angular acceleration (instantaneous max) |
±120°/s2 |
| Measuring/ recording equipment |
Video/audio data Cardiac, muscular, similar biosignals Data synchronization Contact/non-contact visual direction Driver manipulation amount, vehicle condition, manipulative reaction, etc |
|---|
Main research items
- Traffic accident generation mechanisms
- Driver distraction
- Driver assist systems, Human-machine interface
Profile of the omnidirectional-vision driving simulator
JARI’s omni-vision driving simulator shows the images of virtual traffic situations on its screen installed all around the cabin. The cabin itself can be rotated ±300 degrees so that it is possible to replicate a diversity of traffic situations on the screen.