What are the functions of the human-machine interface of an electric wheelchair

HMI

(1) LCD display function.

The information displayed on the LCD of the wheelchair controller is the basic information source provided to the user. It must be able to display various possible operating states of the wheelchair, including: power switch display, battery power display, gear display, programming prohibition mode display, latch lock mode and various fault displays.

(2) Latching mode.

In some special occasions, in order to prevent the controller from misoperation or prevent non-users from using the wheelchair, it is necessary to put the wheelchair into latch mode. Therefore, the wheelchair motion control system must have the function of locking and unlocking the wheelchair.

(3) Sleep mode.
If the wheelchair controller is turned on and the user does not operate the wheelchair for a long time, the controller should be able to automatically turn off to save energy. Therefore, when the wheelchair is turned on and does not receive any user operations on the speed keys and joysticks within three minutes, the wheelchair enters sleep mode.

(4) Function of communicating with PC.

Through the communication between the PC and the wheelchair controller, the following parameters can be set: to the lowest forward speed (the speed gear is adjusted to the lowest, and the maximum speed of the wheelchair when the joystick is moved to the maximum forward speed); to the smallest steering speed (the speed gear is adjusted to the lowest) , the maximum steering speed of the wheelchair when the joystick moves to the left or right); sleep time; software current limit; stop time; steering compensation (when the left and right motor loads are unbalanced, through appropriate load compensation, the joystick is Push straight forward, and the wheelchair can walk in a straight line); Maximum forward speed (the speed gear is adjusted to the highest, and the joystick reaches the maximum speed of the wheelchair when moving forward); Forward acceleration; Reverse deceleration; Maximum steering speed ; Steering acceleration; Steering deceleration; Load compensation; Regulator parameters.