English Glossary - Analysis
| Time, maximum longitudinal delta–V [s] |
Event Data Recorder maximum delta V. |
| ABS activity (engaged, non-engaged) |
-8.0 to 0 sec |
| Airbag deployment time, driver [s] |
Frontal airbag deployment, time to deploy, in the case of a single stage airbag, or time to first stage deployment, in the case of a multi-stage airbag, driver [s] |
| Airbag deployment time, right front passenger [s] |
Frontal airbag deployment, time to deploy, in the case of a single stage air bag, or time to first stage deployment, in the case of a multi-stage airbag, right front passenger [s] |
| Approach Angle |
Angle between velocities of vehicles in motion measured counterclockwise from from the vehicle of interest. |
| Approach Direction Pedestrian |
Pedestrian approach direction from the perspective of the vehicle. |
| Body Region |
Pedestrians body part that contacted vehicle. |
| Brake Distance Before Impact |
Length of the brake distance previous to the impact (in m). |
| C1 [mm] |
The first of six segments (along the damage width) indicating deformation-depth (in mm). |
| C2 [mm] |
The second of six segments (along the damage width) indicating deformation-depth (in mm). |
| C3 [mm] |
The third of six segments (along the damage width) indicating deformation-depth (in mm). |
| C4 [mm] |
The fourth of six segments (along the damage width) indicating deformation-depth (in mm). |
| C5 [mm] |
The fifth of six segments (along the damage width) indicating deformation-depth (in mm). |
| C6 [mm] |
The sixth of six segments (along the damage width) indicating deformation-depth (in mm). |
| CDC1,2 |
Force direction in clock system according to SAE J224. |
| CDC3 |
Impact area, for side deformation use longitudinal areas, for front deformation use lateral area according to SAE J224. |
| CDC4 |
Impact area, for side deformation use longitudinal areas, for front deformation use lateral area according to SAE J224. |
| CDC4e |
Spilt of CDC 4 into longitudinal rail areas and front and rear passenger compartment. |
| CDC5 |
Vertical impact area. |
| CDC6 |
Type of damage distribution: Coding of wide or narrow impact area, sideswipe, rollover, etc. according to SAE J224. |
| CDC7 |
Crush depth zone according to SAE J224. |
| Clutch - EDR |
Event Data Recorder clutch output. |
| Coefficient of restitution |
Measure of energy loss; expressed by the ratio of separation speed and closing speed between the collsion partners. |
| Collision Angle |
Angle from the longitudinal axis of the concerned vehicle to the longitudinal axis of the collision partner according to the SAE system. Anticlockwise directions are coded as postive. |
| Collision Object ID |
Automatic entry. |
| Collision Partner Event Number |
Automatic entry. |
| Collision Partner ID |
Automatic value. |
| Collision speed [km/h] |
Immediate pre-impact speed |
| Complete file recorded (yes,no) |
Following other data. |
| CS source |
Statement about the origin of the collision speed |
| CS tolerance range [km/h] |
+ / - tolerance of the coded collision speed |
| Delta omega (DO) [rad/s] |
Change in rotational velocity |
| Delta V (DV) total [km/h] |
Change of velocity: Post crash velocity minus pre crash velocity. NB: velocity is a vector! |
| Delta-V, longitudinal |
Speed at which the same amount of deformation energy is dissipated. |
| Delta-V, longitudinal [km/h] |
-0.1 to 0.5 sec |
| Delta–V, lateral [m/s] | -0.1 to 0.5 sec |
| Distance from center of gravity [mm] |
Location of midpoint of damaged region with respect to the vehicles center of gravity. |
| Distance from the vehicle front [mm] |
To be filled in for side impacts impacts |
| DO source |
Statement about the origin of the Delta Omega |
| DO tolerance range [rad/s] |
+ / - tolerance of the Delta Omega |
| DV lateral [km/h] |
Component of Delta V in lateral direction. Sign does matter. |
| DV longitudinal [km/h] |
Component of Delta V in longitudinal direction. Sign does matter. |
| DV source |
Statement about the origin of the Delta V. |
| DV tolerance range [km/h] |
+ / - tolerance of the Delta V. |
| EDR ID |
Automatic entry. |
| EES |
Speed at which the same amount of deformation energy is dissipated. |
| EES source [km/h] |
Statement about the origin of the energy equivalent speed |
| EES tolerance range [km/h] |
'+ / - tolerance of the Energy Equivalent Speed |
| Element ID |
Automatic entry. |
| Element ID |
Automatic entry. |
| Engine RPM [rpm] |
Event Data Recorder rpm. |
| Engine throttle or accelarator pedal, % full [%] |
-8.0 to 0 sec |
| Event Distance |
Distance traveled between event initiation and next event (in m). |
| Event ID |
Automatic entry. |
| Event ID |
Automatic entry. |
| Event Time |
Time between start of event and start of next event (in s). |
| Event Type |
Ad the events that occured once for every time they occured. |
| Frontal Airbag Deployment, nth Stage Disposal, Driver - EDR |
Event Data Recorder frontal driver airbag deployment (nth stage) output. |
| Frontal Airbag Deployment, nth Stage Disposal, Right Front Passenger - EDR |
Event Data Recorder frontal airbag deployment (nth stage) output. |
| Frontal Airbag Deployment, Time to nth Stage, Driver - EDR |
Event Data Recorder frontal driver airbag deployment time (nth stage) output. |
| Frontal Airbag Deployment, Time to nth Stage, Right Front Passenger - EDR |
Event Data Recorder frontal airbag deployment (nth stage) output. |
| Frontal Airbag Suppression - EDR |
-1.0 sec |
| Frontal airbag warning lamp, on/off |
-1.0 sec |
| Headlights - EDR |
Event Data Recorder headlights output. |
| Horn - EDR |
Event Data Recorder horn output. |
| Ignition cycle crash |
-1.0 sec |
| Ignition cycle download |
At time of download |
| Impact ID |
Automatic entry. |
| Impact ID |
Automatic entry. |
| Impact ID |
Automatic entry. |
| Initial Rollover Direction |
Direction toward which the rollover was initiated. |
| Initial Speed (IS) |
For the first impact the initial speed is equivalent to the travel speed (in km/h). |
| Initiation of Rollover Event |
Description of how rollover was initiated. |
| IS source |
Statement about the origin of the initial speed. |
| IS tolerance range [km/h] |
+ / - tolerance of the coded initial speed |
| Lateral acceleration [m/s2] |
-0.1 to 0.5 sec |
| Length of Deformation |
Length of damaged region (direct and indirect damage - in mm). |
| Longitudinal acceleration [m/s2] |
-0.1 to 0.5 sec |
| Maximum deformation [mm] |
Maximum deformation depth in damaged region. |
| Maximum delta–V, lateral [m/s] |
Computed after event. |
| Maximum delta–V, longitudinal [km/h] |
Computed after event. |
| Mean Acceleration Before Impact |
Average acceleration of the vehicle previous to the impact (in m/s2). |
| Multi-event, number of events (1, 2) |
Event |
| Normal acceleration [m/s2] | -0.1 to 0.5 sec |
| Number of Lateral Rolls |
Number of longitudinal vehicular quarter rolls. |
| Number of Longitudinal Rolls |
number of longitudinal vehicular quarter rolls. |
| Occupant Position Classification, Driver - EDR |
Event Data Recorder driver positioning output. |
| Occupant Position Classification, Right Front Passenger - EDR |
Event Data Recorder passenger positioning output. |
| Occupant Size Classification, Driver - EDR |
Event Data Recorder driver size output. |
| Occupant Size Classification, Right Front Passenger - EDR |
Event Data Recorder passenger size classification output. |
| Occurred During Rollover |
Accident event occurred during a rollover. |
| Omega [rad/s] |
Post-impact rotational velocity |
| Overlap [%] |
Percentage of deformed area in direct contact with the collision opponent. |
| PDOF |
Direction of the resulting force vector. This direction is identical with the resulting momentum (v*m). |
| PDOF VRU |
The Vulnerable Road User Principal Direction Of Force is the resulting force vector to pedestrian. |
| Pedestrian Contact ID |
Automatic entry. |
| Pedestrian Impact ID |
Automatic entry. |
| Pedestrian Impact ID |
Automatic entry. |
| Pedestrian Speed |
Pre-Impact speed of the pedestrian |
| Pedestrian Speed Description |
Description of the pedestrian movement and positioning. |
| Pedestrian Throw Distance |
Distance between the collision point and the end position of the pedestrian (in m). |
| Pre-Crash Yawing - EDR |
Event Data Recorder yaw rate output. |
| Pretensioner Deployment, Time to Fire, Driver - EDR |
Event Data Recorder driver pretensioner deployment output. |
| Pretensioner Deployment, Time to Fire, Right Front Passenger - EDR |
Event Data Recorder passenger pretensioner output. |
| PS Tolerance Range |
+ / - tolerance of the coded initial speed [km/h]. |
| Relative impact severity |
Event ranking from highest to lowest Delta V. |
| Relative Impact Severity for the Pedestrian |
Event ranking from highest to lowest vehicle collision speed |
| Rollover Causing Event |
Event that led to rollover. |
| Rollover Type |
Rollover description according to NASS |
| ROS source |
Statement about the origin of the run out speed |
| ROS tolerance range [km/h] |
+ / - tolerance of the run out speed |
| Run out speed (ROS) [km/h] |
Immediate post-impact speed |
| Safety belt status, driver |
-1.0 sec |
| Safety Belt Status, Right Front |
-8.0 to 0 sec |
| Seat Track Position Switch, Foremost, Right Front Passenger - EDR |
Event Data Recorder passenger seat track output. |
| Seat Track Position Switch, Foremost, Status, Driver - EDR |
Event Data Recorder driver seat track output. |
| Service brake, on/off |
-8.0 to 0 sec |
| Side Airbag Deployment, Time to Deploy, Driver - EDR |
Event Data Recorder side airbag deployment time output. |
| Side Airbag Deployment, Time to Deploy, Right Front Passenger - EDR |
Event Data Recorder side airbag deployment time output. |
| Side Curtain/Tube Air Bag Deployment, Time to Deploy, Driver Side - EDR |
Event Data Recorder driver airbag deployment time output. |
| Side Curtain/Tube Airbag Deployment, Time to Deploy, Right Side - EDR |
Event Data Recorder side airbag deployment time output. |
| Slip angle |
Angle from the longitudinal axis to the direction of motion according to SAE coordinates. counterclockwise angles are positive. |
| Source for PDOF |
Statement about the origin of the PDOF |
| Speed, vehicle [km/h] |
-8.0 to 0 sec |
| Stability Control |
-8.0 to 0 sec |
| Steering |
Steering action previous to the impact. |
| Steering Input |
-8.0 to 0 sec |
| Stiffness category [mm] |
Stiffness group according to General Vehicle Form in Crash3 / Smash |
| Time from event 1 to 2 [s] |
As needed. |
| Time, maximum delta–V, lateral [s] |
Event Data Recorder maximum delta V lateral. |
| Time, maximum delta–V, resultant [s] |
Event Data Recorder maximum delta V resultant. |
| Turning Indicator - EDR |
Event Data Recorder turning indicator output. |
| Vehicle Area Description - Car |
Zone of pedestrian contact |
| Vehicle energy absorption [kJ] |
Energy absorbed by the vehicle due to deformation in the impact |
| Vehicle roll angle [deg] |
-1.0 to 6.0 sec |
| Wrap Around Distance |
Measurement along the vehicle outer structure from ground to the pedestrian contact point [mm]. |
| X-Measurement |
Horizontal distance between vehicle front and pedestrian contact point [mm]. |
| Y-Measurement |
Horizontal distance between vehicle mid axis and pedestrian contact point. |
| Z-Measurement |
Vertical distance between ground and pedestrian contact point [mm]. |