Universal Real Time Navigational Assistance (Urna)
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Transcript of Universal Real Time Navigational Assistance (Urna)
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Universal Real-Time Navigational Assistance (URNA): An Urban Bluetooth Beacon for the Blind
Presenter: 徐欣佑
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References
S. Bohonos, A. Lee, A. Malik, C. Thai, and R. Manduchi “Universal Real-Time Navigational Assistance (URNA): An Urban Bluetooth Beacon for the Blind.” 1st International Workshop on Systems and Networking Support for Healthcare and Assisted Living Environments (HealthNet 2007), June 2007.
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Introduction
Blind people cannot use techniques sighted people use for safe ambulation Street signals or traffic lights Information of an approaching bus
Location-aware information Bluetooth-enabled system
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Bluetooth beacon
Due to its limited range Ideal solution for location-aware
information broadcasting Transmit the schedule of the bus
stop Description of an urban
intersection
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Previous work
GPS combines with geographic information system (GIS) Environments with tall buildings
Pedestrian traffic lights provide alternative information The acoustic signals are often
confusing
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Previous work (cont’) The Talking Signs s
ystem Uses an infrared (IR)
beacon Decoded by a hand-
held receiver Only when the user
points the receiver
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System description
Universal Real-Time Navigational Assistance (URNA) Field Programmable Gate Array (FPGA) Accessible Pedestrian Signals Bluetooth modules Text-To-Speech (TTS)
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The layout of the URNA architecture in a traffic intersection
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System description (cont’) Navigation Controller (NavCon) FPGA-based board that interfaces wit
h the traffic controller Via Ethernet
Bluetooth modules are located at the intersection
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System description (cont’) Pedestrian Navigator (PedNav)
Written for mobile devices A J2ME application Mobile Information Device Profile (MIDP)
The role of PedNav Accept incoming connections from nearb
y NavCon beacons Relay useful information to the user.
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System description (cont’) Text-To-Speech (TTS)
built-in the Symbian S60 devices Include pre-recorded voice Audio streaming
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Bluetooth modules Via RS-422 and RS-2
32 serial protocol cable length of 50 ft
to 350 ft Power wiring would
still be required Power control
Different communication range
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User interface usability
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Mobile phone
Test equipment Nokia N70, Nokia N91
PedNav software Java-based Voice-guided user interface
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Conclusion and future work The risk of radio range overlap betwe
en different transmitters Improve multiple-connection support
in PedNav Traffic intersection mode Store directory mode
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工作指引觀察紀錄 : 快樂商店
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田野調查時間與地點 北投國軍醫院”快樂商店” 時間: 11/29( 四 ) 09:00 ~ 12:00 就輔員:黃昭蓉 田調人員:廖瑞華、徐欣佑
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工作項目 店面整理、清潔 院區外賣、代購服務 收銀機操作與點貨
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工作指引觀察與評估 店面點貨工作提醒 外賣、代購外送路線指引 收銀機操作