碩士 / 國立臺灣科技大學 / 機械工程系 / 97 / The purpose of this study is to design a device that can help vision impaired people know the location where they are. The device uses Inertial-sensor and Dead-Reckoning technologies in white cane to realize this objective. In order to avoid the accumulation of error on Inertial-sensors, Ultrasonic range sensor are used on the white cane to correct this kind of error. This designed cane detects the environment and helps the user to locate himself. In addition, Simultaneous Location And Mapping, ( SLAM ) technology is studies to be used in the design .
In order to reach the goal of continual locating while receiving the accurate data, this study investigates the motion characteristic of white cane and propose solutions that can calibrate the sensors at some specific instances during the motion. This measure can control the bias of sensor effectively and avoid the accumulation of error. Moreover, Accelerometer and Gyroscope sensors are used to design a proper way of locating.
Based on the result of this study, the designed cane can not only detect the route exactly, but also reduce the error into identified error margin as well. This result will let those vision impaired people walk much more safely and build a mental map for them. This study both extends the application of the white cane successfully and provides an example to those who want to investigate the Ultrasonic range sensor or MEMS sensor applications further in this field .
| Identifer | oai:union.ndltd.org:TW/097NTUS5489063 |
| Date | January 2009 |
| Creators | Tzu-min Lin, 林子閔 |
| Contributors | Wei-wen Kao, 高維文 |
| Source Sets | National Digital Library of Theses and Dissertations in Taiwan |
| Language | zh-TW |
| Detected Language | English |
| Type | 學位論文 ; thesis |
| Format | 78 |
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