AIR BAG SENSOR FOR VEHICLE PROTECTION DURING PARKING MODE

A vehicle system includes a vehicle controller configured to detect a parking mode of a vehicle and generate a low-power command based on detecting the parking mode; a collision monitoring system; and a communication interface. The collision monitoring system includes a sensor controller configured to receive the low-power command via the communication interface, enter into a low-power mode, and set the communication interface into an idle communication mode during the low-power mode; a sensor configured to generate a sensor signal based on a measured property; and a processing circuit configured to compute, during the low-power mode, a derivative measurement at a plurality of sampling times based on the sensor signal, and compare each instance of the derivative measurement to a threshold. The sensor controller is configured to transmit a wake-up command to the vehicle controller via the communication interface based on the derivative measurement satisfying the threshold.