Abstract: A loss of ground detection system includes a reference voltage source that provides a reference voltage, a primary ground connection that is adapted to be connected to a primary ground, a secondary ground connection that is adapted to be connected to a secondary ground, and an internal ground. The system also includes a combined ground integrity monitoring unit that outputs a multistage signal to control electronics. The multistage signal includes a first and a second output voltage. A first switch is interposed between the primary ground connection and the internal ground such that the first switch opens in response to loss of connection to the primary ground as indicated by a change of status in multistage signal, a diode system is interposed between the secondary ground connection and the internal ground, the diode system oriented to allow flow from the internal ground to secondary ground connection under forward bias.

Abstract: In at least one embodiment, an apparatus for monitoring a power feed from a plurality of batteries in a vehicle is provided. The apparatus includes a controller. The controller includes a first circuit portion and a microprocessor. The first circuit portion is configured to receive a first signal indicative of a first power feed for a first battery and a second signal indicative of a second power feed for a second battery. The first circuit portion is further configured to transmit an interrupt signal indicative of each of the first power feed and the second power feed being equal to or below a minimum voltage threshold. The microprocessor includes an interrupt input and is configured to enter into an emergency operation mode to store data corresponding to at least one vehicle operation for a predetermined amount of time in response to receiving the interrupt signal at the interrupt input.

Abstract: In at least one embodiment, an apparatus for monitoring a power feed from a plurality of batteries in a vehicle is provided. The apparatus includes a controller. The controller includes a first circuit portion and a microprocessor. The first circuit portion is configured to receive a first signal indicative of a first power feed for a first battery and a second signal indicative of a second power feed for a second battery. The first circuit portion is further configured to transmit an interrupt signal indicative of each of the first power feed and the second power feed being equal to or below a minimum voltage threshold. The microprocessor includes an interrupt input and is configured to enter into an emergency operation mode to store data corresponding to at least one vehicle operation for a predetermined amount of time in response to receiving the interrupt signal at the interrupt input.

Abstract: A loss of ground detection system includes a reference voltage source that provides a reference voltage, a primary ground connection that is adapted to be connected to a primary ground, a secondary ground connection that is adapted to be connected to a secondary ground, and an internal ground. The system also includes a combined ground integrity monitoring unit that outputs a multistage signal to control electronics. The multistage signal includes a first and a second output voltage. A first switch is interposed between the primary ground connection and the internal ground such that the first switch opens in response to loss of connection to the primary ground as indicated by a change of status in multistage signal, a diode system is interposed between the secondary ground connection and the internal ground, the diode system oriented to allow flow from the internal ground to secondary ground connection under forward bias.