Different sources used to monitor cornering
Harsh cornering can be monitored using the 3-axis accelerometer or GPS heading rate of change.
3-axis cornering is always recommended if the unit in question has an internal 3-axis accelerometer. Units that do not have an internal accelerometer need to use GPS-derived cornering.
GPS vs 3-Axis cornering: These two sources will always have slight differences relative to one another in terms of the time they occurred and peak values recorded. GPS-derived cornering will only work when speed and other signal-related factors are adequate. Accelerometer-derived cornering will be affected by how level the road is and how soft the vehicle suspension is (both of which are undetectable by GPS).
The below documents the events and parameters available for use with the abovementioned sources.
3-Axis Accelerometer Cornering
Unit types: FM (models that have 3-axis accelerometer)/MiX 4000/MiX 6000
Standardized Event
Event description: 3-Axis – Harsh Cornering
Custom Event Parameters
3-Axis Cornering G-Force (High Sensitivity)
3-Axis Cornering G-Force (Low Sensitivity)
3-Axis Cornering G-Force (Medium Sensitivity)
Important notes:
“3-Axis Cornering G-Force (High Sensitivity)”, “3-Axis Cornering G-Force (Low Sensitivity)” and “3-Axis Cornering G-Force (Medium Sensitivity)” will provide the same values, so it is recommended that only “3-Axis Cornering G-Force (High Sensitivity)” is used.
Accelerometer data is smoothed over a 500ms window before using the filtered data for analysis.
GPS Cornering
The below events and parameters make use of GPS heading rate of change to determine cornering.
It is important to note that if you have GPS signals that are weak or have some interference, you can get false triggers. It is always recommended to add GPS filters in the conditions of the GPS-derived cornering events to monitor for HDOP, the number of satellites, and age of reading.
Unit type: FMs
Standardized Events
No standardized events are available. Users to create their own custom events using the below parameters.
Custom Event Parameters
Cornering G-Force (High Sensitivity): Data is averaged over 1 second
Cornering G-Force (Med Sensitivity): Data is averaged over 2 seconds
Cornering G-Force (Low Sensitivity): Data is averaged over 3 seconds
Unit types: 4000/6000
Standardized Events
* Harsh Cornering
* Harsh Left Cornering
* Harsh Right Cornering
Custom Event Parameters
Cornering G-Force (High Sensitivity): Data is averaged over 1 second
Cornering G-Force (Low Sensitivity): Data is averaged over 1 second
Cornering G-Force (Med Sensitivity): Data is averaged over 1 second
Important notes
“Cornering G-Force (High Sensitivity)”, “Cornering G-Force (Medium Sensitivity)”, and “Cornering G-Force (Low Sensitivity)” all have a 1-second filter duration and will provide the same values, so it is recommended that only “Cornering G-Force (High Sensitivity)” is used.
Unit types: MiX2000, Phone as OBC, Calamp, Teltonika, Remora, Oyster, Yabby
Standardized Events
* Harsh Cornering
* Harsh Left Cornering
* Harsh Right Cornering
Custom Event Parameter:
Track trace cornering threshold
Please note that values are returned in mg and not G as with the other parameters