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Research Article

A Smart Infrared Microcontroller-Based Blind Guidance System

Table 1

Existing wearable blind guidance systems.

System typeSystem nameReference YearCountrySignal inputSignal outputAdvantagesDisadvantages

Sonar systemsNavBelt[5] 1998USAUltrasonicAuditory displayCan provide range of information of the obstacle Cannot provide precise information such as shape and motion state of obstacles, and also cannot make judgments to the travel orientation
People sensor[6]1998USAUltrasonicVibrotactile cues
3D space perceptor[7]2003CanadaLaserAuditory display
Navigation system based on optical peacans[8]2001JapanInfrared signalAuditory display

Camera based systemsv0ICe[9]1992NetherlandsCCD cameraAuditory display It provides information not only about obstacles along the traveled path
Assists the user in selecting the preferred travel path
It can capture whole environment information
It can use advanced image processing algorithm to train complex data
larger size, higher cost relatively, and it need two cameras so as distance detection algorithms is more complex than sonar-based ETAs
Tyflos[10]2001USACamera and laser scannerAuditory display
NAVI[11]2007MalaysiaCCD cameraAuditory display
AudioMan[12]2007ChinaCCD cameraAuditory display
SoundView[13]2009ChinaCCD cameraAuditory display

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