Driver Monitoring System: Notes
| 1. | Refer to DRIVER ALERT LIGHTING MODULE (DALM) (2023 Only). |
| 2. | Refer to INSTRUMENT PANEL CLUSTER (IPC) . |
| 3. | Refer to DRIVER MONITORING SYSTEM MODULE (DMSM) . |
| 4. | Refer to BODY CONTROL MODULE (BCM) . |
| 5. | Refer to DRIVER MONITORING CAMERA MODULE (DMCM) . |
| 6. | Refer to CENTRAL ADAS DECISION MODULES (CADM/CADM2) . CADM - Passenger Rear Location CADM 2 - Driver Rear Location |
| 7. | Refer to HANDS ON DETECTION (HOD) MODULE . |
| 8. | Refer to DRIVER SEAT MODULE (DSM) . |
| 9. | Refer to DRIVER ALERT LIGHTING (DAL) (2023 Only). |
| - | Refer to HAPTIC SEAT FEEDBACK MOTOR (2024 and newer models). |
The Driver Monitoring system is used in conjunction with the highway assist plus system. The Driver Monitoring function is used to manage and safeguard the appropriate level of the drivers attentions during all highway assist modes of operations. Highway assist requires that the driver will respond appropriately to a request to intervene. Consequently, the driver must be closely monitored from the DMC, DMSM, and other signals on the Controller Area Network-Flexible Data (CAN-FD) bus, and determines the drivers overall status and availability to support the systems autonomy features.
OPERATION
Driver Model Assessment - The CADM is responsible for a driver model algorithm that estimates the status of the driver and whether they have met the required attention criteria. This algorithm monitors signals on the CAN bus such as:
- Driver Behavior - head and eye tracking
- Driver Interactions - seat movements, steering wheel, button presses, accelerator and braking pedals.
- Environmental Conditions - host vehicle speed, road curvature, number of target vehicles, distance to target vehicles.
Once conditions have been met, the CADM transmits a bus message that is received by the DMSM that indicates conditions have been met and to turn on the DMSM and DMC and begin tracking the drivers head and eye movements. Condition examples include (but are not limited to):
- Zone Track
= "On Road". The Driver Model monitors a DMSM signal over Low Voltage Differential Signaling (LVDS) to determine if the driver has been looking off road while operating the vehicle. The driver is expected to maintain their eyes on a road Zone 1. The driver can momentarily look at zones 2-6. Each of these 2-6 zones have tunable parameters that the Driver Model uses to gauge its respective impact on the Driver Model algorithm.
1 On road looking ahead through the left side of the windshield, eyes forward. 2 Looking at the IPC. 3 Looking at the left side exterior rearview mirror. 4 Looking at the right side exterior rearview mirror. 5 Looking at the area of the radio. 6 Looking at the interior rearview mirror. 7 Considered looking off road altogether. Examples would be looking at the shifter area, the glove box or the interior center floor console. - Distract State
= "Not Distracted".
1 On road looking ahead through the left side of the windshield, eyes forward. 2 Looking at the IPC. 3 Looking at the left side exterior rearview mirror. 4 Looking at the right side exterior rearview mirror. 5 Looking at the area of the radio. 6 Looking at the interior rearview mirror. 7 Considered looking off road altogether. Examples would be looking at the shifter area, the glove box or the interior center floor console. - Drowsy State = "Not Drowsy".
- Driver Presence = "Present".
- Eyes Tracked = "True" or "Active". The Driver Model monitors a DMSM signal over LVDS to determine if the drivers are tracked or not.
- Driver relative seat movement is less than allowable threshold.
The opposite of these states are considered by the Driver Model to be criteria not being met.
There are conditions that can cause the Driver Model to not be able to determine the criteria which can lead to the system not operating properly or at all. Examples include bit are not limited to:
- If the DMC is blinded or covered.
- If the system is calibrating.
- If there is a fault in any relevant component used by the system.
Drivers seat movement - Seat recline and seat track movement are monitored by the CADM through signals received from the BCM using the CAN-FD bus. The threshold for allowable driver adjusted seat recline or seat track movements is tunable and has an initial value of 30% full range of the seat travel sensor capacity.