AI Assisted Calibration of Imus

US 12,372,376, assigned to Aim Design LLC, covers inertial measurement unit (IMU) sensor networks with integrated artificial intelligence processing, and is available for sale through IPApproach.

US Patents

1 granted

Assignee

Aim Design LLC

Availability

For Sale

Patents Included

• US 12,372,376↗

Technology Highlights

• The invention relates to an advanced inertial measurement unit (IMU) sensor network incorporating integrated artificial intelligence for on-device processing. The system enhances measurement accuracy while reducing computational overhead by leveraging deep learning techniques and real-time edge processing compared with conventional IMU-based solutions.
• The invention employs simulation data gathered under diverse operating conditions to train a neural network model. The training process encompasses learning multiple movement patterns with associated pattern-specific constraints, while during deployment, operational data is continuously acquired and used to adaptively update the neural network based on observed usage patterns.
• The invention provides a processor that performs adaptive processing, dynamically adjusting its operations in response to current conditions and system requirements to balance and optimize measurement accuracy against computational efficiency.
• The invention defines a workflow in which context-guided raw sensor data is acquired and validated against ground-truth reference data to develop the underlying model. Once trained, the model is optimized for efficient execution on resource-constrained single-board MCU or CPU platforms and integrated with inertial measurement unit (IMU) and navigation-processing modules.
• The invention directly processes raw sensor voltage outputs to derive high-precision position and orientation estimates while substantially reducing computational overhead. This voltage-level processing constitutes a marked deviation from conventional pipelines that rely on factory calibration constants, lookup tables, and extensive manufacturer-supplied correction data. The architecture employs only selective signal conditioning as a pre-processing stage, preserving the central innovation of end-to-end processing from raw voltage measurements.
• The invention employs a three-axis gyroscope subsystem configured to measure angular velocity around the X, Y, and Z axes of each sensor node. The gyroscope provides high-precision rotational rate measurements over a wide dynamic range, enabling accurate characterization of complex rotational motions.
• The invention comprises continuous monitoring of the system's kinematic parameters, automatic detection of operating conditions based on the monitored data, and initiation of appropriate response mechanisms when predefined conditions are met.
• The invention provides a processing device that includes a Teensy 4.1 microcontroller that is designed to run AI models. This MCU allows for a balance of processing power, power consumption, and form factor. The MCU implements power management techniques to maximize battery life while maintaining processing performance.
• The invention defines a training pipeline for the deep neural network that leverages real-world derived simulation datasets acquired under diverse environmental conditions. Specialized test rigs reproduce the full range of joint articulations and orientations in three-dimensional space while concurrently capturing ground-truth positional information, thereby generating paired training data.
• The invention incorporates a feedback subsystem that completes the overall architecture by providing real-time monitoring of model outputs. This mechanism continuously evaluates prediction accuracy, detects discrepancies, and initiates alerts or corrective actions as needed. Operational data is feedback into the learning pipeline to enable adaptive refinement and iterative model updates, thereby supporting ongoing enhancement of calibration accuracy over the system's service life.
• The invention delivers a substantial advancement in inertial measurement unit technology by tightly integrating AI-based processing with efficient edge computing. This architecture enables more accurate and reliable motion tracking while markedly reducing reliance on external reference or sensing systems.
• The invention evaluates long-distance navigation performance using inertial measurement unit data exclusively. This testing regime verifies the system's ability to constrain drift over prolonged operation and demonstrates that it can maintain accurate positioning in the absence of any external reference signals.
• The invention provides multiple sensors for measuring environmental conditions such as temperature, structural strain (via strain gauges), magnetic fields, or other relevant parameters that could affect IMU performance. The temperature sensors are strategically placed to monitor both ambient and component-level temperatures, enabling real-time compensation for thermal effects.

Overview

The technology disclosed provides the following advantages:

Listing updated August 21, 2026

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