| 摘要 |
An obstruction marking method (600) includes generating (608) a first echo curve (510) using an electronic level gauge (ELG) (140) coupled to a tank (110) from a first reflected signal (echo signal) received when a material (120) in the tank is at a first level. The ELG includes a radar-based obstruction detection algorithm (143a) stored in a memory (142) coupled thereto. A processor (141) implementing the obstruction detection algorithm identifies at least a first feature in the first echo curve to provide at least one suspected obstruction (410) along with its position (first feature position) (546). A second echo curve (540) is generated (612) from a second reflected signal when the material is at a second level. A third echo curve (530) is generated (614) from a third reflected signal when the material is at a third level. The suspected obstruction at the first feature position is stored (616) in the memory as a verified obstruction (346) with its first feature position. |
