Indoor Positioning via Device Coordinate Alignment Without Anchors
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Solution Overview
Problem
The deployment of anchors for indoor positioning systems is labor-intensive and costly, requiring professional setup to ensure accuracy, which is difficult to achieve in residential settings, and is prone to errors due to manual orientation changes.
Innovation Solution
An indoor positioning method that establishes a first coordinate system based on the geometric structure of home appliances, using their antenna arrays as origins, and converts this to a geodetic coordinate system for accurate positioning without manual anchor setup, utilizing a conversion relationship to align and measure angles and distances automatically.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If professional persons are used to set up anchors, then positioning accuracy is improved, but labor costs and deployment complexity increase
Solution Approach 1:
The system enables self-service deployment by allowing devices to automatically establish their own coordinate systems and perform mutual positioning measurements without professional installation personnel. Each device with an antenna array can independently determine positions of other devices through automated signal measurement and coordinate transformation.
Solution Approach 2:
Instead of having professional personnel manually configure anchor positions and orientations, the system inverts the approach by having devices automatically determine each other's positions through mutual measurement. The coordinate system origin and orientation are automatically established based on device geometry rather than manual configuration.
2Ease of manufacture
If manual anchor setup is performed, then positioning system can be deployed, but positioning accuracy deteriorates due to orientation changes
Solution Approach 1:
The system dynamically adapts to device orientations by automatically establishing coordinate systems based on the actual geometric structure and antenna array configuration of each device. The coordinate transformation process accounts for any orientation changes, allowing the system to maintain accuracy regardless of how devices are positioned or oriented during deployment.
Solution Approach 2:
The system changes the parameter representation by using relative coordinate systems that are automatically transformed between devices. Instead of relying on fixed absolute coordinates that require precise manual setup, the system uses transformable coordinate parameters that adapt to each device's actual configuration and orientation.
3Area of stationary object
If anchors are deployed in residential settings, then positioning coverage is improved, but deployment difficulty increases due to lack of professional personnel
Solution Approach 1:
The system enables ordinary residential devices to perform self-service deployment by automatically establishing coordinate systems and conducting positioning measurements without requiring professional installation personnel. Any device with an antenna array can participate in the positioning network.
Solution Approach 2:
The coordinate system transformation acts as an intermediary mechanism that bridges devices with different orientations and configurations. This mathematical intermediary allows devices to communicate their positions accurately regardless of their physical arrangement in the residential environment.
Data Source
Figure 1~2A
Figure 2B~3A
Figure 3B
AI summary
This application discloses an indoor positioning method and device. The method includes: receiving a first measurement parameter obtained by a first device by measuring a second device in a first coordinate system, where the first measurement parameter includes a first angle and a first distance, the first angle is an angle of the second device in the first coordinate system, and the first distance is a distance of the second device relative to an origin of coordinates of the first coordinate system; determining a first spatial position of the second device in the first coordinate system based on the first angle and the first distance; and determining a spatial position of the second device in a geodetic coordinate system based on the first spatial position and a conversion relationship between the first coordinate system and the geodetic coordinate system. According to this method, the first coordinate system of the first device is established, and the angle and the distance of the indoor second device are measured by using the first coordinate system, to further determine the spatial position of the second device in the geodetic coordinate system. Manual setup and deployment of an anchor are avoided, so that positioning is implemented, and human costs are saved.