Key Features

IMU Placement and Measurement

Location: Embedded in a mouthpiece for accurate motion capture.
Measurements: Captures linear and angular accelerations in X, Y, and Z axes, along with gravity.
Degrees of Freedom: 7 degrees of freedom (3 linear, 3 angular, 1 gravity).

Noise and Drift Management

Filtering: Utilizes low-frequency and high-frequency filters to manage noise and drift.
Zeroing: Automatically zeros out at stationary positions upon startup.

Acceleration Measurement

Modes: Operates in both fine and coarse modes.
Impact Detection: Detects significant impacts with thresholds set for different levels of Z-axis acceleration.

Impact Thresholds and Alerts

Thresholds: Based on NIH concussion data, impacts over 2Z trigger alerts.
Summation of Hits: Sums multiple hits to assess cumulative impact and trigger alerts.

Processor and Communication

Processor: Equipped with a Cortex-M3 or Cortex-M4 microcontroller for data processing and alert management.
Communication: Uses WiFi for wireless communication, connecting to a hub with cellular service for data transmission.

Power and Battery Management

Power Source: Powered by a 3.3V button battery.
Battery Management System (BMS): Ensures efficient power usage and longevity.