Research and development of a hand-held vision system for the visually impaired

8th IEEE International Workshop on Robot and Human Interaction. RO-MAN '99 (Cat. No.99TH8483) Pub Date : 1999-09-27 DOI:10.1109/ROMAN.1999.900303

D. Ikeya, J. Takeno

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引用次数: 4

Abstract

The authors have proposed an artificial vision system for the visually impaired that compensates for their sight disabilities and enables them to walk without danger as much as possible. This system consists of a stereo distance-measuring system PRPS (passive range pattern sensor), MPU, a signal amplifier, and a tactile pin display. The system acquires multiple points of distance information (up to 3.0 meters away), converts and displays the information via a wired connection using amplitude intensities corresponding to each point in the distance. The distance information acquired via 24 windows in the image obtained from the PRPS was output from a PC. Using firmware in the RAM of the MPU, rectangular waveforms corresponding to the 24 points of distance information obtained from the PC are generated and output to each terminal of the specified ports. The signals (rectangular waveforms) from the MPU are amplified and output to /spl plusmn/90V. Piezoceramics corresponding to each terminal of the output ports specified by the processor are vibrated by the electric potential difference in the amplified rectangular waveforms.

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为视障人士研发一种手持视觉系统

作者提出了一种为视力受损的人设计的人工视觉系统，以补偿他们的视力障碍，使他们尽可能在没有危险的情况下行走。该系统由立体距离测量系统PRPS(无源距离模式传感器)、MPU、信号放大器和触觉引脚显示器组成。系统获取多个点的距离信息(最远可达3.0米)，通过有线连接使用距离中每个点对应的振幅强度转换并显示信息。从PRPS获取的图像中，通过24个窗口获取的距离信息由PC机输出。利用主控板RAM中的固件，生成与PC机获取的24点距离信息相对应的矩形波形，输出到指定端口的各个端子。来自MPU的信号(矩形波形)被放大并输出到/spl plusmn/90V。与处理器指定的输出端口的每个端子相对应的压电陶瓷受到放大矩形波形中的电位差的振动。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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8th IEEE International Workshop on Robot and Human Interaction. RO-MAN '99 (Cat. No.99TH8483)

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