Journal of Biomedical Engineering Research (대한의용생체공학회:의공학회지)

The Korean Society of Medical and Biological Engineering (대한의용생체공학회)
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Object Search Using Synchronous Ultrasonic Wave Emission for the Blind Guide system

시각장애인 안내 시스템을 위한 복수 초음파센서 동시 조사에 의한 장애물 검색

  • Kim, Chang-Geol (Dept. of Rehabilitation Science & Technology, Daegu University) ;
  • Song, Byung-Seop (Dept. of Rehabilitation Science & Technology, Daegu University)
  • 김창걸 (대구대학교 재활과학대학 재활공학과) ;
  • 송병섭 (대구대학교 재활과학대학 재활공학과)
  • Published : 2008.10.31
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Abstract

For use in the guide system for the people who are visually impaired, an obstacle searching device using synchronous ultrasonic wave emission was proposed and developed. Generally, the conventional obstacle detection methods use the ultrasonic distance measuring device with successive scan method. However, the scan method causes a theoretical error and it couldn't estimate accurate obstacle distances. The proposed synchronous firing method use the plural number of ultrasonic sensors which emit ultrasonic wave simultaneously and estimate the distance to the closest obstacle relatively accurately. We analytically analyzed the errors of the conventional and proposed methods and compared the quantitative differences of the errors. The differences verified by obstacle search experiments. Using the proposed ultrasonic wave synchronous firing method, 3 dimensional obstacle location estimating device was designed and implemented. The results of the 3 dimensional obstacle detecting experiments showed the proposed method had good performances and it would be sufficiently use in the guide system for the people who are visually impaired.

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References

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