Blind Drive Obstacle Detection via Dynamic Current Thresholds

The patent merges the functions of limit stop detection and obstacle detection into a single current measuring device. The electronic control unit uses the same current sensor to detect both the upper and lower limit stops by identifying characteristic current profiles, and to detect obstacles by comparing current values against dynamic thresholds. This consolidation eliminates the need for separate mechanical switches while maintaining comprehensive detection capability.

The current measuring device is designed to perform multiple functions: it detects the upper limit stop, lower limit stop, and obstacles during screen movement. The electronic control unit analyzes current values in different movement phases to identify various conditions, making the single device universal for all detection needs rather than requiring specialized sensors for each function.

The system performs self-calibration by automatically learning the current profiles during limit stop positions through a learning phase. The electronic control unit stores these characteristic profiles in memory and uses them as reference for obstacle detection. This self-service approach eliminates the need for manual threshold adjustment and enables automatic adaptation to environmental changes and usage patterns over time.

The patent implements dynamic threshold adjustment where the electronic control unit modifies intensity thresholds based on elapsed time, screen position, and learned current profiles. The thresholds are not fixed but change according to the operational context, allowing the system to maintain high detection accuracy across varying environmental conditions and usage scenarios without requiring complex manual reconfiguration.