Direction-Finding Chip with IMU for Beacon Calibration
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Solution Overview
Problem
Conventional direction-finding systems require accurate alignment of beacon antennas with the coordinate system, which is time-consuming and labor-intensive to deploy and maintain, especially when beacons are moved or rotated.
Innovation Solution
Incorporating an inertial measurement unit (IMU) into the direction-finding chip of beacons to generate acceleration, magnetic field, and angular velocity data, allowing for automatic calibration and monitoring of antenna directions, enabling compensation of angle information and reducing the need for precise alignment with the coordinate system.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If accurate alignment of beacon antennas with the coordinate system is performed manually, then angle information accuracy is improved, but deployment time and labor cost increase
Solution Approach 1:
The patent replaces the manual mechanical alignment process with an automated electronic calibration system. The direction-finding chip automatically calibrates antenna directions by comparing measured angle information with pre-stored coordinate data, eliminating the need for manual measurement and alignment tools.
Solution Approach 2:
The beacon performs self-calibration through the integrated direction-finding chip, which automatically adjusts and stores calibration data without requiring external intervention. The system uses its own internal sensors and processing capabilities to maintain accuracy, making the deployment process autonomous.
2Measurement precision
If manual measurement of antenna angles is performed during deployment, then initial angle information accuracy is improved, but maintenance complexity increases when beacons are moved or rotated
Solution Approach 1:
The system transitions from static pre-calibrated angles to dynamic real-time calibration. The direction-finding chip continuously or periodically recalibrates antenna directions based on current beacon orientation, allowing the system to adapt automatically when beacons are moved or rotated without requiring manual remeasurement.
Solution Approach 2:
The system implements a feedback mechanism where the direction-finding chip measures actual angle information, compares it with expected values based on stored coordinate data, and automatically adjusts calibration parameters. This closed-loop approach ensures accuracy is maintained even when beacons are repositioned.
3Measurement precision
If precise alignment procedures are implemented, then direction-finding accuracy is improved, but device complexity and deployment cost increase
Solution Approach 1:
The patent combines multiple functions into a single integrated direction-finding chip: angle measurement, calibration computation, coordinate conversion, and data storage. This integration eliminates the need for separate alignment tools, multiple calibration devices, and complex deployment procedures, reducing overall system complexity while maintaining accuracy.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This solution streamlines beacon deployment, reduces maintenance costs, and allows for efficient and accurate angle information calculation, even when beacons are moved or rotated, enhancing the efficiency and accuracy of direction-finding systems.
Implementation Method 1
The computation circuit is configured to generate coordinate conversion information or a correction amount of the coordinate conversion information according to an acceleration and a magnetic field vector generated by the inertial measurement unit
Implementation Method 2
The RF circuit is coupled to the computation circuit and is configured to transmit the supplement and the coordinate conversion information or the correction amount
Data Source
AI summary
The present invention discloses a direction-finding chip, a direction-finding method and a beacon. The direction-finding chip is applied to a beacon of a direction-finding system. The beacon includes multiple antennas and an inertial measurement unit (IMU). A mobile device can calculate angle information according to supplement provided by the beacon. The direction-finding chip includes a computation circuit and a radio frequency circuit. The computation circuit generates coordinate conversion information or a correction amount of the coordinate conversion information according to an acceleration and a magnetic field vector generated by the IMU. The coordinate conversion information or the correction amount can be used to compensate the angle information. The radio frequency circuit is coupled to the computation circuit and configured to transmit the supplement and the coordinate conversion information or the correction amount.