Positioning Adapter Using Audio Interface Encoding for Indoor Navigation
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Solution Overview
Problem
Current indoor positioning technologies in hospitals face challenges with low accuracy due to interference from open frequency bands and the need for special hardware, which complicates cost, efficiency, and information security.
Innovation Solution
A positioning adapter that uses near field communication circuits to connect with smart devices, receiving position information from triggers at fixed positions and encoding it for transmission, allowing for accurate indoor positioning without requiring additional hardware or compromising information security.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If open frequency band positioning is used, then coverage area is large, but positioning accuracy deteriorates due to interference
Solution Approach 1:
The patent introduces an encoder as an intermediary device that converts position information into encoded form. The encoder receives position data from the communication circuit and transforms it into a coded representation that can be transmitted through the audio interface, thereby enabling accurate positioning without direct exposure to interference-prone open frequency bands
Solution Approach 2:
The patent replaces traditional electromagnetic wave-based positioning (prone to interference) with an audio signal-based transmission system. By using the smartphone's audio interface to transmit encoded position information, the system substitutes a more stable communication channel that is less susceptible to environmental interference
2Measurement precision
If special positioning hardware is deployed, then positioning accuracy is improved, but device complexity and cost increase
Solution Approach 1:
The patent makes the smartphone's existing audio interface serve multiple functions: it is used for both audio input/output and for transmitting positioning data. This multi-functionality eliminates the need for dedicated positioning hardware, reducing device complexity while maintaining positioning accuracy through the encoded information transmission channel
Solution Approach 2:
The system utilizes the smartphone's own built-in audio interface and processing capabilities to handle positioning tasks. The smartphone serves itself by using its existing hardware resources (microphone, audio processor) to receive, decode, and process position information, eliminating dependency on external specialized positioning devices
3Ease of operation
If traditional positioning systems are used, then basic positioning function is provided, but information security deteriorates
Solution Approach 1:
The encoder acts as a security intermediary that transforms sensitive position information into an encoded format before transmission. This intermediate encoding step protects the original position data from being directly intercepted or misused, enhancing information security while still allowing the positioning function to operate through the audio interface
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
The solution provides accurate indoor positioning, reduces costs by utilizing common intelligent devices, and enhances user experience by enabling efficient navigation and queue management within hospitals.
Implementation Method 1
The first communication circuit is a near field communication circuit; the near field communication circuit is configured to receive position information transmitted from triggers at fixed positions and send the position information as well as identity information to the encoder. The near field communication circuit communicates through 125 KHz frequency signals.
Data Source
AI summary
The present disclosure provides a positioning adapter, a communication method, an indoor positioning system and an indoor positioning method. The positioning adapter includes: a first communication circuit, an encoder, a second communication circuit and an adaptation interface. The first communication circuit is configured to receive position information, and send the position information as well as identity information to the encoder. The encoder is configured to receive the position information and the identity information, obtain encoded information that matches the smart device by encoding the position information and the identity information, and send the encoded information to the second communication circuit. The second communication circuit is configured to receive the coded information and transmit the coded information to the smart device through the adaptation interface. The adaptation interface is configured to connect the positioning adapter with the smart device, and communicate with the smart device through the second communication circuit.