Indoor Positioning Device and Method

Indoor Positioning Device Using Takeoff Vibration Error Correction

This technology reduces positioning errors caused by airframe vibration and abrupt maneuvers by identifying abnormal acceleration segments that exceed a specific threshold during drone flight, setting them as a dead-band, and excluding that time data from position calculations.

Drones experience frequent movements and airframe vibrations for attitude control during flight, which introduces irregular noise into Inertial Measurement Unit (IMU) data, leading to cumulative errors in velocity and position estimates.

This technology establishes a threshold by measuring vibrations before takeoff and ensures the reliability of the positioning algorithm by filtering out data points where acceleration measurements exceed this threshold during flight.

‍

‍

Key Features:

• An inertial navigation unit that senses whether the mobile object is in a pre-takeoff, moving, or hovering state.
• A single acceleration measurement unit that measures first acceleration to eliminate pre-takeoff vibration errors and second acceleration of the mobile object during post-takeoff movement or hovering.
• A control unit that determines whether the second acceleration of the mobile object measured by the measurement unit exceeds a set threshold.
• A position calculation unit that calculates the position of the mobile object using the measured value if the second acceleration is below the threshold, or by excluding the corresponding time if it is above the threshold.

‍