Abstract
Compared with manual wheelchair, electric wheelchairs are more suitable for long-distance walking. But the price of electric wheelchair is high and it is inconvenient to carry. In this paper, a new type of external traction device of wheelchair based on STM32 chip was designed, which was versatile, light weight and easy to carry. The traction device was mainly composed of car body, electric wheel, drive control system, electronic intelligent steering system, speed control system, pre-crash safety system and etc. It had a variety of functions and was easy to operate, providing excellent solutions for wheelchair users.
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