Device Vehicle Types - Harsh Events

Device Vehicle Types - Harsh Events

The vehicle type classification for a camera impacts automated safety events in Autonomise for harsh acceleration, harsh braking, turn, and shock events. Customers may assign a vehicle type for each device in Autonomise>Vehicle Management>Edit Vehicle. The fleet management section of Autonomise allows customers to apply a high, medium, or low safety threshold for each vehicle type. A high safety threshold produces a lower number of safety events and is the default setting for all new fleets. 

Vehicle Types

Car

Shorter chassis less pitch and role. Needing more sensitive G-Sensor settings due to less inertia.

Van

Harder suspension and higher cab more pitch and role with more inertia created by weight at the rear of the vehicle.

Small Rigid Truck

Higher chassis more load normally standard suspension with more inertia created by weight at the rear of the vehicle.

Large Rigid Truck

Higher chassis more load running on softer air suspension with more movement and more inertia created by weight at the rear of the vehicle.

Tractor Trailer

Higher chassis more load running on softer air suspension with more movement and more inertia created by the weight of the trailer. This requires the lowest sensitivity.

Chassis Dynamics

There are four tire tread contact patches that support the weight and control the motion of a vehicle. There are a lot of terms used to describe the motion of an automotive chassis and how it affects “where the rubber meets the road.” 

Facing the front of the vehicle, the Z roll axis is a line that passes through the roll center of the front suspension and rear suspension. This line or axis moves with the change in position of the front and rear suspension when the vehicle is cornering, accelerating and braking. The X pitch axis is a line or axis that passes through the center of gravity of the vehicle. A vehicle will move on this axis under acceleration and braking. The Y (Yaw) axis is at the centre of gravity and roll axis. The angle generated by the force of the vehicle rounding a corner is called sideslip

Cornering or lateral acceleration causes the chassis to roll. The faster the vehicle speed in the corner, the more the chassis will tend to roll. The smaller the vehicle the less inertia and lateral G-force is created

Definitions:

Inertia:

A property of matter by which it continues in its existing state of rest or uniform motion in a straight line, unless that state is changed by an external force.

Chassis:

The supporting frame of an automobile that is load bearing.

Axis:

A fixed reference line for measurement or coordinates.

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