Abstract: This document describes techniques for parking and ventilation management systems for vehicle batteries. An example system includes a processor that determines whether a battery of a vehicle requires cooling. In response to a determination that the battery requires cooling, the processor determines where the vehicle is located (e.g., home garage or public location). If the vehicle is parked in the home garage, the processor requests a change in an initial state value of a home component (e.g., garage door) to reduce the ambient temperature of the home garage. If the vehicle is located in a public location, the processor determines a parking space with optimal thermal conditions (e.g., shaded or fewer surrounding vehicles) and autonomously operates the vehicle to the selected parking space. In this way, the described system can manage ambient conditions to improve temperature management of vehicle batteries, thereby improving their reliability and longevity.

Abstract: A heading determination system for determining heading of a vehicle includes a connection module configured to receive device heading information from a user device. The device heading information indicates a direction of movement of the user device. The heading determination system includes a movement determination module configured to, based on location information of the user device measured by the vehicle, determine a relative device movement. The relative device movement indicates a direction of movement of the user device relative to the vehicle. The heading determination system includes a localization module configured to determine the heading of the vehicle based on the device heading information and the relative device movement, and transmit the heading of the vehicle to a control module of the vehicle to perform an action.

Abstract: Described are techniques and systems for secure camera based IMU calibration for stationary systems, including vehicles. Existing vehicle camera systems are employed, with enhanced security to prevent malicious attempts by hackers to try and cause a vehicle to enter IMU calibration mode. IMU calibration occurs when a calibration system determines the vehicle is parked in a controlled environment; calibration targets are positioned at different viewing angles to vehicle cameras to act as sources of optical patterns of encoded data. Features of the patterns are for security as well as for alignment functionality. Images of the calibration targets enable inference of a vehicle coordinate system, from which calculations for IMU mounting error compensations are performed. A relative rotation between the IMU and the vehicle coordinate system are applied to IMU data to compensate for relative rotations between the vehicle and the IMU, thereby improving vehicle slope and bank metrics.

Abstract: The methods and systems herein enable dynamic cellular antenna allocation. Respective statuses of cellular radios are first received. Each of the statuses comprise an idle status or an active status with one or more operating bands. The operating bands are then evaluated for potential interferences between each other and with one or more other radios. Based on the statuses and the potential interferences, a configuration of a switch matrix configured to connect each of a plurality of cellular antennas to either one of the cellular radios or to a termination resistor is determined. The configuration is such that antennas connected to the cellular radios with the potential interferences are physically isolated from each other and any unused cellular antennas are connected to the termination resistor. The configuration is then applied to the switch matrix such that the potential interferences may be mitigated.

Abstract: This document describes techniques for parking and ventilation management systems for vehicle batteries. An example system includes a processor that determines whether a battery of a vehicle requires cooling. In response to a determination that the battery requires cooling, the processor determines where the vehicle is located (e.g., home garage or public location). If the vehicle is parked in the home garage, the processor requests a change in an initial state value of a home component (e.g., garage door) to reduce the ambient temperature of the home garage. If the vehicle is located in a public location, the processor determines a parking space with optimal thermal conditions (e.g., shaded or fewer surrounding vehicles) and autonomously operates the vehicle to the selected parking space. In this way, the described system can manage ambient conditions to improve temperature management of vehicle batteries, thereby improving their reliability and longevity.

Abstract: An inertial measurement unit (IMU) self-test system includes an IMU and a control circuit. The control circuit is configured to receive IMU data collected by the IMU and inputs from systems external to the IMU indicative of mechanical stimulus, wherein the control circuit utilizes IMU data collected in response to the mechanical stimulus to determine IMU validity.

Abstract: Responsive to determining that a quality of a V2V connection between a host vehicle and a target does not satisfy a threshold, a following position of the host vehicle relative to the target and whether the following position is within a predicted null position of the V2V connection and closer to the target than a selected position are determined. The following position is then controlled based on whether the following position is within the predicted null position and whether the following position is closer to the target than the selected position. By controlling the following position based on the quality of the V2V connection and the null position, more-reliable V2V connections may be maintained, thus enabling better performance of downstream operations.

Abstract: The techniques of this disclosure relate to a system for transmitting radio frequency signals. The system includes a controller in communication with a first device fixed within a first housing attached to an exterior of a vehicle. The system also includes a second device fixed within a second housing attached to the exterior of the vehicle. The controller determines whether the first housing and the second housing are in a first position or in a second position. When the first housing and the second housing are in the first position, the controller transmits first radio frequency signals via the first device and via the second device. When the first housing and the second housing are in the second position, the controller transmits second radio frequency signals via the first device and via the second device. The system improves an antenna coverage area of the first device and second device.

Abstract: Described are techniques and systems for secure camera based IMU calibration for stationary systems, including vehicles. Existing vehicle camera systems are employed, with enhanced security to prevent malicious attempts by hackers to try and cause a vehicle to enter IMU calibration mode. IMU calibration occurs when a calibration system determines the vehicle is parked in a controlled environment; calibration targets are positioned at different viewing angles to vehicle cameras to act as sources of optical patterns of encoded data. Features of the patterns are for security as well as for alignment functionality. Images of the calibration targets enable inference of a vehicle coordinate system, from which calculations for IMU mounting error compensations are performed. A relative rotation between the IMU and the vehicle coordinate system are applied to IMU data to compensate for relative rotations between the vehicle and the IMU, thereby improving vehicle slope and bank metrics.

Abstract: The techniques of this disclosure relate to a system for transmitting radio frequency signals. The system includes a controller in communication with a first device fixed within a first housing attached to an exterior of a vehicle. The system also includes a second device fixed within a second housing attached to the exterior of the vehicle. The controller determines whether the first housing and the second housing are in a first position or in a second position. When the first housing and the second housing are in the first position, the controller transmits first radio frequency signals via the first device and via the second device. When the first housing and the second housing are in the second position, the controller transmits second radio frequency signals via the first device and via the second device. The system improves an antenna coverage area of the first device and second device.

Abstract: An inertial measurement unit (IMU) self-test system includes an IMU and a control circuit. The control circuit is configured to receive IMU data collected by the IMU and inputs from systems external to the IMU indicative of mechanical stimulus, wherein the control circuit utilizes IMU data collected in response to the mechanical stimulus to determine IMU validity.