Indoor Positioning via Wireless Receiver and Camera
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Solution Overview
Problem
Existing indoor positioning technologies based on WIFI face challenges such as high costs, complex installation processes, and limitations due to proprietary hardware, especially when trying to maximize the use of existing facilities while minimizing maintenance and costs.
Innovation Solution
An indoor positioning method utilizing a single wireless receiver and a camera, where the receiver detects WIFI signals, extracts MAC addresses and CSI, and a server calculates the incident angle and position using image pixels, enabling accurate positioning with real-time calculation and cost-effective implementation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If multiple wireless receivers or proprietary hardware are used for real-time calculation positioning, then positioning accuracy is improved, but device complexity and cost increase
Solution Approach 1:
The patent makes the wireless receiver perform multiple functions: it simultaneously captures WIFI signals for positioning and captures images for positioning. By integrating image capture functionality into the wireless receiver, the system eliminates the need for separate camera hardware, reducing device complexity while maintaining positioning accuracy through the combined use of signal data and image data.
2Productivity
If proprietary chips or firmware modifications are implemented, then real-time calculation capability is improved, but ease of manufacture and deployment deteriorates
Solution Approach 1:
The patent enables standard wireless receivers to perform positioning calculations using their existing capabilities without requiring proprietary chips or firmware modifications. The system uses publicly available WIFI signals and standard image processing techniques, allowing any compatible wireless receiver to participate in the positioning system, thereby greatly simplifying deployment and manufacture.
3Reliability
If fingerprint database methods are used, then positioning functionality is achieved, but device complexity and maintenance cost increase
Solution Approach 1:
The patent replaces the mechanical approach of fingerprint database matching with a real-time geometric calculation system. Instead of capturing environmental fingerprints and matching them against a database, the system directly calculates position using real-time WIFI signal parameters and image data, eliminating the need for complex database infrastructure and simplifying the system architecture.
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 method achieves accurate positioning with reduced costs and simplified installation by leveraging standard WIFI infrastructure and widely used camera technology, ensuring real-time calculations and effective positioning results.
Implementation Method 1
S1: the wireless receiver detects a query WIFI signal transmitted by a target device
Implementation Method 2
S3: the server calculates an incident angle of the target device and the wireless receiver according to the CSI uploaded by the wireless receiver
Implementation Method 3
S3: the server sends a photographing instruction to the camera which photographs an image and uploads the image to the server
Implementation Method 4
S4: the server obtains the distance between the wireless receiver and the target device through the image pixels
Data Source
AI summary
The invention provides an indoor positioning method and system based on a wireless receiver and a camera, belonging to the field of positioning technology. The method in the invention comprises the following steps: a wireless receiver detects a query WIFI signal transmitted by a target device and extracts a MAC address and CSI of the target device from a query WIFI signal; a server captures the MAC address and the CSI of the target device from the wireless receiver, calculates an incident angle of the target device and the wireless receiver and sends a photographing instruction to a camera which photographs an image and uploads the image to the server; the server obtains the distance between the wireless receiver and the target device through the image pixels, and calculates the position information of the target device according to the coordinates of the wireless receiver. The invention realizes the accurate positioning of the target device by using only a wireless receiver and a camera, so that the cost can be controlled and a real-time calculation can be ensured; the combination of the two beneficial effects can help achieve good positioning results.