Artificial Magnetic Field Indoor Positioning via Conducting Wire
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Solution Overview
Problem
Existing indoor positioning methods based on the Earth's magnetic field require prior collection of user data to create a magnetic field map and are heavily influenced by the surrounding electromagnetic environment, necessitating real-time solutions that do not rely on such data collection and are less affected by environmental interference.
Innovation Solution
A system utilizing a magnetic field generation device to periodically generate an artificial magnetic field, which is propagated through a conducting wire, allowing a user terminal equipped with a geomagnetic sensor to detect and compare the field patterns for real-time location measurement, with optional correction using an inertial sensor and control device adjustments.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If Earth's magnetic field is used for indoor positioning, then positioning can be achieved, but prior data collection and magnetic field map creation are required
Solution Approach 1:
The patent applies preliminary action by pre-calculating and storing magnetic field pattern information at multiple predetermined locations before actual positioning occurs. This allows the system to avoid real-time data collection during positioning, as the reference magnetic field maps are prepared in advance and stored for immediate use during location determination.
2Measurement precision
If Earth's magnetic field is used for indoor positioning, then positioning can be achieved, but the system is greatly affected by surrounding electromagnetic wave generation environment
Solution Approach 1:
The patent extracts the harmful influence of environmental electromagnetic waves by using an artificial magnetic field generated by a controlled magnetic field generation device, rather than relying on the Earth's magnetic field which is susceptible to external interference. The artificial field is generated in a controlled manner and its pattern is stored for comparison, effectively isolating the positioning system from environmental electromagnetic disturbances.
Solution Approach 2:
The patent introduces an intermediary approach by using an artificial magnetic field as a mediator between the positioning system and the environment. This artificial field serves as a controlled reference that is less susceptible to external electromagnetic interference, allowing accurate positioning without direct exposure to harmful environmental factors.
3Measurement precision
If prior magnetic field map collection is required, then positioning accuracy can be maintained, but real-time positioning capability is reduced
Solution Approach 1:
The patent applies preliminary action by pre-calculating and storing magnetic field pattern information at multiple predetermined locations before actual positioning occurs. This allows the system to avoid real-time data collection during positioning, as the reference magnetic field maps are prepared in advance and stored for immediate use during location determination.
Solution Approach 2:
The patent uses copying by creating a stored copy of the magnetic field pattern information at multiple predetermined locations. These copied pattern data are stored in advance and can be immediately retrieved and compared during positioning operations, enabling real-time location determination without requiring live data collection or map updates.
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
Enables real-time indoor location tracking without prior mapping, minimizing environmental interference and improving accuracy through pattern matching and inertial corrections.
Implementation Method 1
a magnetic field generation device configured to periodically generate an artificial magnetic field and propagate the artificial magnetic field to an indoor space through a conducting wire
Implementation Method 2
a user terminal including a geomagnetic sensor, the user terminal being configured to detect, by using the geomagnetic sensor, the artificial magnetic field propagated through the conducting wire
Data Source
AI summary
According to an embodiment of the present disclosure, an indoor positioning system may include a magnetic field generation device configured to periodically generate an artificial magnetic field and propagate the artificial magnetic field to an indoor space through a conducting wire, a control device configured to adjust characteristics of the artificial magnetic field, control an operation of the magnetic field generation device, and store pattern information about the artificial magnetic field according to a location of the artificial magnetic field on the conducting wire, and a user terminal including a geomagnetic sensor, the user terminal being configured to detect, by using the geomagnetic sensor, the artificial magnetic field propagated through the conducting wire, compare a result of the detection of the artificial magnetic field with the pattern information, and measure, based on a result of the comparison, location information about a user in the indoor space.