Magnetic Recording Alignment for Indoor Authentication and Localization
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Solution Overview
Problem
Magnetic sensors face inaccuracies in indoor environments due to non-uniform and anomalous magnetic fields, leading to incorrect functioning of fusion filters and inability to accurately determine orientation or other variables.
Innovation Solution
Utilizing magnetic recordings from magnetometers to create unique time series measurements, which are aligned and compared for authentication purposes, combined with inertial and other sensor data to enhance accuracy and reliability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If fusion filter is used to combine sensor data, then measurement accuracy should be improved, but in indoor environments with non-uniform magnetic fields, the fusion filter functions incorrectly and orientation cannot be determined accurately
Solution Approach 1:
The patent converts the harmful effect of non-uniform magnetic fields into a beneficial authentication feature. Instead of treating magnetic anomalies as noise to be filtered out, the system records and compares unique magnetic field signatures at different locations. The magnetic field irregularities that cause fusion filter failures become the basis for location verification and authentication, transforming the problem into a solution.
2Loss of information
If magnetic sensors are used in indoor environments, then location and orientation data can be collected, but the non-uniform and anomalous magnetic fields lead to significant measurement inaccuracies
Solution Approach 1:
The system transforms magnetic field anomalies from harmful measurement errors into useful authentication information. By recording the unique magnetic field signature at a specific location and comparing it with a reference recording, the system uses the very anomalies that degrade continuous measurement quality as a reliable indicator of location identity for authentication purposes.
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
Enhances authentication by providing a reliable method to verify user or device identity through unique magnetic recordings, improving accuracy and security in indoor environments.
Implementation Method 1
A magnetic recording may include a unique series of magnetic measurements (such as, for example, measurements of magnetic-field strength, magnetic-field inclination angle, magnetic susceptibility, magnetic conductivity, or a combination of the foregoing) made by one or more magnetic sensors (such as, for example, magnetometers).
Data Source
AI summary
In one embodiment, a method includes, by an electronic device, accessing a first series of first magnetic values that represents a first magnetic recording that comprises a first set of first magnetic measurements that are each represented by one of the first magnetic values. The method includes, by the electronic device, accessing a second series of second magnetic values that represents a second magnetic recording that comprises a second set of second magnetic measurements that are each represented by one of the second magnetic values. The method includes, by the electronic device, approximately aligning the first and second series with each other; calculating a difference between the first and second series as aligned with each other; determining a similarity between the first and second series based on the difference; and performing navigation or localization based on the determined similarity.