PULSE SHAPE CHANGE FOR INTERFACE DETERMINATION

摘要

A method (100) of pulsed radar interface determination for a first and second material in a tank (205), An interface level determination model is provided (101) including a transfer function that utilizes refractive indices for the materials and thickness of the second material. At least one actual radar pulse is transmitted (102) into the tank and a resulting echo curve portion including a measured interface pulse(s) around the interface location is measured. The interface model is simulated (103) with a reference pulse and an initial thickness value to generate an initial model generated interface pulse (initial MGIP). The measured interface pulse is compared (104) to the initial MGIP pulse point-by-point to determine residuals. If the residuals sum > a predetermined threshold, the comparing (105) is repeated with an updated interface model generated with an updated thickness value that provides an updated MGIP pulse. When the sum of residuals is < predetermined threshold, the thickness is determined (106).