Patent attributes
A system and method for determining a discharge event of a firearm is provided. An event detection module receives acceleration and rotation input signals from an inertial measurement unit configured on the firearm. Respective acceleration and rotation input signals are assigned to sample event candidates at respective windows of time. The acceleration signals of the sampled event candidates are compared to a discharge acceleration template that represents a confirmed weapon discharge event. A subset of accepted accelerations from the sampled event candidates are identified that satisfy the discharge acceleration template. A first rotation input signal from the sample window of time associated with each accepted acceleration in the subset is compared to a first rotation template that represents a confirmed weapon discharge event. A determination is made whether the sample event candidate is a discharge event based on satisfying both the discharge acceleration template and the first rotation template.