US 8583407 B2

 

　　A method of modeling a surface of an object using ultrasonic transducers mounted on the surface by: providing a model of the surface comprising a primary set of surface points indicative of the height of the surface, transmitting pulsed waves from a first transducer to one or more second transducers along respective paths along the surface, measuring travel times of the pulsed waves along each path, calculating travel times based on the model of the surface, adjusting the model of the surface in response to any discrepancies between the measured travel times and the calculated travel times. The above steps are repeated until the discrepancies are smaller than a predetermined threshold. The step of calculating the travel times comprises interpolating the primary set of surface points in order to obtain an expanded secondary set of surface points, and the travel times are calculated using the expanded set.

 

　　這是一種使用安裝在物體表面上的超聲換能器對對象的表面建模的方法，通過：提供表面模型，包括象征所述表面高度的表面點的主集，脈沖波從第一換能器沿表面的相應路徑傳送到一個或多個第二換能器，測量脈沖波沿每條路徑的傳播時間，計算在基于表面模型的基礎上的傳播時間，調(diào)節(jié)表面模型響應于測量得到的傳播時間之間的任何差異，從而計算出傳播時間。重復上述步驟，直到差異比預定的閾值小。計算傳播時間的步驟包括內(nèi)插的表面點的主集，以獲得擴展的次級組表面點，并且傳播時間使用次級組表面點計算。