Indoor Navigation System for Visually Impaired Using Multi-Source Positioning
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Solution Overview
Problem
Current navigation aids for the visually impaired are bulky, attention-drawing, and lack specific indoor guidance features, with existing indoor mapping systems being in their infancy and lacking accuracy and tailored assistance for individuals who are blind or visually impaired.
Innovation Solution
A handheld system using a combination of GPS, Bluetooth, infrared, Wi-Fi, and RFID technologies to provide detailed and accurate location information, allowing users to download electronic maps and receive visual and voice guidance within indoor facilities, with dedicated wireless transceivers and a processor to refine location and provide directions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If traditional vision aids are used, then visual assistance is provided, but the devices are large and bulky, drawing attention to the user's visual impairment
Solution Approach 1:
The patent integrates multiple functions into a single handheld device: GPS positioning, electronic map display, wireless transceiver communication, and visual/audible guidance output. This consolidation eliminates the need for separate bulky vision aid devices while maintaining all necessary assistive functions, directly resolving the contradiction between device capability and portability
Solution Approach 2:
The system merges navigation technology (GPS, electronic maps) with assistive technology (visual/audible guidance) into one integrated handheld device. This combination allows the device to provide comprehensive indoor navigation assistance without requiring multiple separate components, achieving both functionality and compactness
2Measurement precision
If GPS is used for positioning, then outdoor location determination is achieved, but signal reception sensitivity is degraded in indoor areas
Solution Approach 1:
The patent introduces dedicated wireless transceivers as intermediary devices installed throughout the indoor facility. These transceivers create a local positioning infrastructure that mediates between the user's handheld device and the positioning system, enabling accurate indoor location determination where GPS signals fail by providing alternative wireless signal references
Solution Approach 2:
The positioning system is segmented into multiple distributed wireless transceivers placed throughout the facility rather than relying on a single centralized system. This segmentation allows the system to provide localized positioning coverage in indoor areas, with each transceiver handling positioning requests in its vicinity, thereby maintaining reliability and precision across the entire indoor environment
3Reliability
If cellular-based positioning is used, then indoor location determination is possible, but positioning accuracy is relatively low
Solution Approach 1:
The patent implements localized positioning using dedicated wireless transceivers distributed throughout the specific indoor facility rather than relying on broad cellular network infrastructure. This local quality approach allows for higher positioning accuracy within the facility by using closely spaced transceivers that provide more precise signal triangulation compared to distant cellular towers
4Adaptability or versatility
If existing indoor mapping systems are used, then basic navigation is provided, but they lack specific assistance features for visually impaired individuals
Solution Approach 1:
The system provides tailored assistance for visually impaired users through localized output mechanisms: visual displays on the handheld device screen and audible guidance through speakers. These localized output channels deliver navigation information in formats specifically suitable for visually impaired individuals, adapting the general indoor mapping capability to meet specific user needs
Data Source
AI summary
An indoor guidance system for a blind or visually impaired person. The system uses a mobile device (Smartphone, tablet, etc.) to provide maps and visual and voice guidance to assist individuals in navigating through indoor locations. Special maps are transmitted to the mobile device upon entering the facility, or downloaded in advance. The software and maps provide assistance to the user, to guide them through the facility. The system uses a combination of GPS and other technologies (Bluetooth, infrared, Wi-Fi, RFID, etc.) to provide extremely detailed and accurate location information to the user.