Abstract: According to one aspect, this disclosure describes a novel indirect weight sensing device, systems, and related processes. In at least one embodiment, the present systems include one or more springs with known properties, at least one metal plate on which the springs are fastened and through which the container load is transferred from the container to the ground, a spring deformation sensor by which spring deformation is reckoned, a digital level by which general orientation of the upper plate is determined relative to the ground, a computing unit to collect and process data from the spring deformation sensor and digital level, and an antenna or other such hardware to wirelessly connect to another device and interface with the computing unit.

Abstract: A wearable device may be configured to detect and alert wearers to improper movements at a body joint based on a comparison of a lateral angle and a bend angle of the body joint and/or based on measurements customized for an individual wearer of the wearable device. For example, a wearable device may determine a bend angle and a corresponding lateral angle of the knee. The wearable device may compare the determined bend angle and lateral angle with stored thresholds customized for the wearer. The wearable device may select a threshold from the stored thresholds with a bend angle that matches the determined bend angle. The wearable device may then determine whether the determined lateral angle matches and/or exceeds one or more lateral angles associated with the bend angle of the threshold. The wearable device may provide feedback responsive to a determination that the threshold was exceeded.