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.

 

　　这是一种使用安装在物体表面上的超声换能器对对象的表面建模的方法，通过：提供表面模型，包括象征所述表面高度的表面点的主集，脉冲波从第一换能器沿表面的相应路径传送到一个或多个第二换能器，测量脉冲波沿每条路径的传播时间，计算在基于表面模型的基础上的传播时间，调节表面模型响应于测量得到的传播时间之间的任何差异，从而计算出传播时间。重复上述步骤，直到差异比预定的阈值小。计算传播时间的步骤包括内插的表面点的主集，以获得扩展的次级组表面点，并且传播时间使用次级组表面点计算。