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Setting Up and Analyzing G-SENSOR Data
The G-Force sensor detects changes in directional forces affecting the vehicle. The Dual-Vision™
XC Player displays G-force data in a graphical format, and creates Events when those forces
exceed supervisor-set values. One may interpret the data as follows:
Suggested Configuration Settings
Setup G-Force Sensor
Note that X & Y axes are 0 when vehicle is stationary. The Z- Axis is typically at +1 when
vehicle is stationary, due to the effect of the earth’s gravitational force. Using the slide-
bars, adjust the values for each axis. This is a trial-and-error effort, since different types of
vehicles will react differently under various road conditions. The values represent a range (+
or -) around G=0. The values for the Z-Axis must be set above 1, so that it does not record
Events while the vehicle is not moving. Under normal driving conditions for an automobile,
settings of X= .8G, Y= .6G, Z= 1.8G are recommended as being sufficient to identify driver-
behavior issues while being high enough to avoid most unnecessary Event-marking caused by
potholes or normal braking. Please see the above chart for suggested settings appropriate for a
variety of commercial vehicles.
Vehicle Type
X, Y, Z Axes
School Bus
1.0, 1.0, 2.0
Shuttle Bus
1.0, 1.0, 2.0
Coach Bus
1.0, 1.0, 2.0
Truck (Highway)
1.0, 1.0, 2.0
Truck (Local)
1.2, 1.2, 2.5
Sedan
0.8, 0.6, 1.8
VEHICLE STOPPED
DECELERATION
ACCELERATION
FRONTAL COLLISION
REAR COLLISION
LEFT / RIGHT TURN
KEY
X-AXIS
: LEFT / RIGHT MOTION
Y-AXIS
: FRONT / BACK MOTION
Z-AXIS
: UP / DOWN MOTION
E
X
A
M
P
L
E
S
O
N
L
Y
REAR COLLISION
