Ultrasonic Parking Edge Detection Curb Plausibility Check

The patent introduces a curb signal as an intermediary reference for plausibility checking. The curb signal acts as a mediator between the raw distance signals and the final edge detection result, providing a reference framework to validate whether detected edges are physically plausible. This intermediary layer filters out false detections caused by scattering while maintaining the overall simplicity of the detection process.

The patent implements a feedback mechanism where the detected edge position is checked against the curb signal profile. If the detected edge falls outside the visible curb area or creates physical inconsistencies, the system uses the curb signal feedback to correct or reject the detection. This feedback loop significantly improves edge detection accuracy without requiring complex additional hardware.

The patent performs preliminary processing of higher echoes to establish the curb course profile before actual edge detection occurs. By pre-processing the curb signal and storing it as a reference framework, the system avoids the need to analyze all higher echoes in real-time during edge detection. This preliminary action significantly reduces processing time while maintaining high curb positioning accuracy.

The patent selectively uses higher echoes only in the regions where the curb is expected to be visible, rather than processing all echo data comprehensively. By focusing computational resources on the relevant partial area where curb detection is needed, the system achieves high positioning accuracy without the excessive processing time that would result from analyzing all possible echo paths.