Omni-directional intelligent electric wheel chair

Abstract

The invention discloses an omni-directional intelligent electric wheel chair, which comprises a chassis frame and a seat, wherein the two sides below the chassis frame are respectively hinged with an actuating arm of which the left and the right correspond; the actuating arm is connected with Mecanum wheels which can be used for forming a pair of front wheels and a pair of rear wheels; the two sides below the seat, the front part of the seat and the upper parts of the front wheels are respectively provided with an ultrasonic sensor; the outer sides of the Mecanum wheels are respectively provided with an infrared sensor; a handle of the seat is provided with a control box and an operating handle; the actuating arm is also provided with a drive control board; and a drive control board circuit is connected with a digital signal processor (DSP). Compared with the conventional two-wheeled rear-drive electric wheel chair, the omni-directional intelligent electric wheel chair provided by the invention has omni-directional moving abilities, such as lateral direction, slant direction and the like, and has larger movement flexibility; and environment around the wheel chair can be detected through the ultrasonic sensor and the infrared sensor, so as to provide a rider with information of a barrier which can hinder the wheel chair to move, realize that the rider can automatically avoid the barrier when driving the wheel chair or can brake the wheel chair, improve use safety of the wheel chair.

Description

technical field [0001] The invention relates to an omnidirectional intelligent electric wheelchair. Background technique [0002] With the improvement of living standards, electric wheelchairs have gradually received attention and attention because they can make up for the inconvenience in walking of middle-aged and elderly people and people with lower limb disabilities. Existing electric wheelchair of multiple models has been put into practical use at present. Most of the currently sold products adopt the structural design of traditional manual wheelchairs: two large-diameter rear wheels are used as driving wheels, and two small-diameter swivel casters are used as front support wheels, which can realize forward and backward movement and rotation. Based on this design, the rotation center of the wheelchair is on the rear wheel axis, the rotation radius is large, and the space occupied is also large, which is not suitable for use in places with limited space such as elevator...

AI Technical Summary

Problems solved by technology

Based on this design, the rotation center of the wheelchair is on the rear wheel axis, the rotation radius is large, and the space occupied is also large, which is not suitable for use in places with limited space such as elevators and offices; in addition, the universal casters at the front of the wheelchair can neither output power Inability to control the direction, which leads to a decrease in mobility and controllability of the wheelchair on uneven and obstructed roads

In addition, the driving of the existing electric wheelchairs is entirely dependent on the user's manual control, and the requirements for the user's reaction speed, distance, speed judgment ability and operation accuracy are relatively high, which makes some elderly people unable to use it safely and normally.

The application number is 200710173079 patent application, which discloses an intelligent wheelchair. On the basis of the function of walking, by setting a mechanical arm with seven degrees of freedom, it can help the elderly or disabled people with low self-care ability to complete basic tasks suitable for life. However, the smart wheelchair only has the anti-collision function during the moving process, but cannot avoid obstacles, especially when the user encounters an obstacle and fails to respond in time, it cannot avoid the obstacle or stop the wheelchair in time. To ensure the safety of the user, at the same time, the movement theory used can only realize the movement in a straight line, and cannot move in any direction in a 360-degree direction. Therefore, it is difficult to adapt to use in places with relatively small spaces.

Images