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Development of obstacle detection system for collision avoidance

Development of obstacle detection system for collision avoidance / Ng Lai Boon
Tongkat tradisional adalah alat biasa yang digunakan oleh cacat penglihatan untuk mengesan halangan di hadapan paras lutut daripada mereka. Walau bagaimanapun, masalah utama dengan menggunakan tongkat tradisional adalah ketidakupayaan untuk pengguna untuk mengesan halangan di atas paras tanah dan di luar tongkat jarak pengesanan. Banyak alat bantuan perjalanan elektronik (ETA) boleh didapati untuk membantu kesukaran mobiliti cacat penglihatan. Walaupun, sesetengah ETA mempunyai limitasi dalam halangan pengesanan untuk mengelakkan perlanggaran. Untuk mengurangkan limitasi ETA yang sedia ada dan kesukaran mobiliti cacat penglihatan, sistem halangan pengesanan perlu dibangunkan. Projek ini membentangkan pembangunan prototaip tongkat dengan sistem mengesan halangan berdasarkan perpaduan penderia. Penempatan dan orientasi penderia pada tongkat berjaya dianalisa dari segi mengesan sudut dan jarak. Selain itu, sistem kawalan sudut kecondongan dilaksanakan pada prototaip ini bergantung kepada ketinggian pengguna untuk memastikan penderia bekerja dengan berkesan dalam jarak pengesanan. Selepas beberapa ujian telah dijalankan, sistem kawalan sudut kecondongan dapat mengekalkan sudut mengesan penderia ultrasonik dalam sekitar sudut optimum iaitu 10 darjah. Akhir sekali, suara amaran aplikasi Android dibangunkan untuk membantu cacat penglihatan untuk meramalkan kedudukan halangan. Terdapat lebih daripada 85% nisbah keputusan yang betul telah diperolehi bagi tinggi halangan, tengah-tengah halangan, rendah halangan dan halangan yang tergantung. _______________________________________________________________________________________________________ The traditional walking stick is a common tool that visually impaired use to detect an obstacle in front of knee level of them. Nevertheless, the main problem with the use of the traditional walking stick is its inability for a user to detect obstacle above the ground level and beyond the stick detect range. There have many electronic travel aids (ETAs) are available for assisting mobility difficulties of the visually impaired. However, some of the ETAs exist limitation in obstacle detection for collision avoidance. To reduce the limitations of existing ETAs and mobility difficulties of visually impaired, an obstacle detection system needs to be developed. This project presents the development of a walking stick prototype with a sensor fusion based obstacle detection system. The placement and orientation of the sensor on the walking stick are successfully analysed in terms of detecting angle and range. Moreover, a tilt angle control system is implemented on the prototype depend on the height of user to ensure the sensors work effectively in the detection range. After several tests have been conducted, the tilt angle control system is able to retain the angle of the ultrasonic sensors in around the optimal angle which is 10 degrees. Lastly, a voice alert Android application is developed for assisting the visually impaired to predict the position of obstacle. There has more than 85% correct decision ratio was obtained for the high, middle, low and hanging obstacle.
Contributor(s):
Ng Lai Boon - Author
Primary Item Type:
Final Year Project
Identifiers:
Barcode : 00003107046
Accession Number : 875007168
Language:
English
Subject Keywords:
traditional walking stick; detect obstacle; stick detect range
First presented to the public:
6/1/2017
Original Publication Date:
4/19/2018
Previously Published By:
Universiti Sains Malaysia
Place Of Publication:
School of Electrical & Electronic Engineering
Citation:
Extents:
Number of Pages - 104
License Grantor / Date Granted:
  / ( View License )
Date Deposited
2018-04-19 16:04:43.695
Date Last Updated
2019-01-07 11:24:32.9118
Submitter:
Mohd Jasnizam Mohd Salleh

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