Design of intelligent wheelchair obstacle detection system based on multiple ultrasonic waves

Zhengfu Yang; Wen Zhang; Xiao Tian

doi:10.1117/12.2682355

26 May 2023 Design of intelligent wheelchair obstacle detection system based on multiple ultrasonic waves

Zhengfu Yang, Wen Zhang, Xiao Tian

Proceedings Volume 12700, International Conference on Electronic Information Engineering and Data Processing (EIEDP 2023); 1270032 (2023) https://doi.org/10.1117/12.2682355
Event: International Conference on Electronic Information Engineering and Data Processing (EIEDP 2023), 2023, Nanchang, China

Abstract

For the problem of obstacle detection of smart wheelchair on horizontal ground, an obstacle detection system was designed in this paper by using STM32 microcontroller which was based on multi-channel ultrasonic. The system mainly includes controller, ultrasonic module, LCD display module, voice alarm module and handle button module. The distance measurement accuracy of the ultrasonic module was improved with temperature compensation and digital processing of the echo signal. The RS485 bus was used to implement communication between the controller and multiple ultrasonic sensors. According to the ultrasonic information, the surrounding area of the wheelchair was divided into ten areas to distinguish the direction of obstacles. The real-time obstacle information was stored in the form of array, laying a foundation for the subsequent intelligent development. The experimental test shows that the designed system can achieve accurate distance measurement in the range of 26cm to approximately 250cm with a relative error of no more than 1%.

Citation Download Citation

Zhengfu Yang, Wen Zhang, and Xiao Tian "Design of intelligent wheelchair obstacle detection system based on multiple ultrasonic waves", Proc. SPIE 12700, International Conference on Electronic Information Engineering and Data Processing (EIEDP 2023), 1270032 (26 May 2023); https://doi.org/10.1117/12.2682355

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KEYWORDS

Ultrasonics

Sensors

Design and modelling

Distance measurement

Analog to digital converters

Power supplies

Digital signal processing

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