Abstract: Systems and methods for detecting a position of a breech of a weapon using a breech position detector. The breech position detector includes one or more electrical leads configured to make physical contact with the weapon, a DC detector configured to detect a DC signal at one of the one or more electrical leads, a RF detector configured to detect a RF signal at one of the one or more electrical leads, and a controller. The controller is configured to perform operations including receiving the DC signal from the DC detector, receiving the RF signal from the RF detector, and determining the position of the breech based on one or both of the DC signal and the RF signal. The operations may also include comparing a magnitude of the DC signal to a DC threshold and comparing a magnitude of the RF signal to a RF threshold.

Abstract: An inertial measurement unit includes a substrate having MEMS gyroscopes arranged on the substrate as opposing pairs. The gyroscopes of each opposing pair are arranged on opposite sides of an axis of rotation of the substrate and each opposing pair has a central axis that intersects an axis of rotation of the substrate. A processor receives a rotational measurement from each gyroscope, compares the measurements from gyroscopes of each opposing pair, determines a mean or median rotation value for each opposing pair, and compares the mean or median rotation value with a threshold value. The processor assigns a weight to the mean or median value for each opposing pair and determines a rotation of the cuboid inertial measurement unit based on the mean or median value for each opposing pair and the respective weight for the mean or median value for each opposing pair.

Abstract: Systems and methods for detecting a position of a breech of a weapon using a breech position detector. The breech position detector includes one or more electrical leads configured to make physical contact with the weapon, a DC detector configured to detect a DC signal at one of the one or more electrical leads, a RF detector configured to detect a RF signal at one of the one or more electrical leads, and a controller. The controller is configured to perform operations including receiving the DC signal from the DC detector, receiving the RF signal from the RF detector, and determining the position of the breech based on one or both of the DC signal and the RF signal. The operations may also include comparing a magnitude of the DC signal to a DC threshold and comparing a magnitude of the RF signal to a RF threshold.

Abstract: An inertial measurement unit includes a substrate having MEMS gyroscopes arranged on the substrate as opposing pairs. The gyroscopes of each opposing pair are arranged on opposite sides of an axis of rotation of the substrate and each opposing pair has a central axis that intersects an axis of rotation of the substrate. A processor receives a rotational measurement from each gyroscope, compares the measurements from gyroscopes of each opposing pair, determines a mean or median rotation value for each opposing pair, and compares the mean or median rotation value with a threshold value. The processor assigns a weight to the mean or median value for each opposing pair and determines a rotation of the cuboid inertial measurement unit based on the mean or median value for each opposing pair and the respective weight for the mean or median value for each opposing pair.