Wiper Sweep Limit Feedback Control With Tracer Position Sensing

The patent implements feedback control by using sensors (optical, magnetic, or mechanical) to detect the actual position of the wiper arm and comparing it with the desired position. The controller adjusts the motor shaft rotations based on the position error signal, ensuring accurate positioning despite environmental changes. This closed-loop feedback mechanism resolves the contradiction by maintaining both reliability and measurement precision simultaneously.

The patent replaces conventional mechanical position sensing methods with electronic sensors and digital control systems. Instead of relying solely on mechanical gear reducers and software-coded rotations, the system uses electronic position sensors to provide real-time position data to the controller, enabling precise digital control of the wiper arm position and resolving the accuracy issues of conventional mechanical systems.

The patent implements beforehand cushioning by providing backup mechanical限位 devices (mechanical stops or limit switches) that physically prevent the wiper arm from exceeding its sweep limits. These mechanical safeguards are pre-configured to activate before soft control failures can cause erratic behavior, thus cushioning against potential system failures while maintaining operational flexibility through the primary soft control system.

The patent creates a homogeneous control architecture where both soft control and hard mechanical limits work together in a unified system. The mechanical限位 devices are designed to complement the software control logic, creating a layered protection system where each layer reinforces the other, ensuring that control flexibility and reliability are both maintained through consistent design principles across different control mechanisms.