公开(公告)号：US4905207A

公开(公告)日：1990-02-27

申请号：US247412

申请日：1988-09-21

申请人： Michael W. Fellinger ,  Richard J. Shelquist

发明人： Michael W. Fellinger ,  Richard J. Shelquist

IPC分类号： G01S15/06 ,  G01S15/89

CPC分类号： G01S15/06 ,  G01S15/89

摘要： Distance measurements are made using two or more signal frequencies. Ultrasonic energy is transmitted from a transducer to an object. Returned ultrasonic energy is received by the transducer and processed to provide an accurate determination of the distance between the transducer and the point on the object receiving the ultrasonic energy. In connection with the processing, a number of relationships are utilized. Using certain of the relationships, a range of integers is determined using high and low frequency ultrasonic energy, as well as propagation time. A time-related phase shift determination is also made for each of the high and low frequencies using certain of the other known relationships. Using a range of distance values and the measured time-related values, an accurate determination of distance from the transducer to the object can be made. In one application, a number of different distance values are obtained to define the surface plane of the object, such as a wheel or tire.

摘要翻译： 使用两个或多个信号频率进行距离测量。 超声能量从传感器传输到物体。 由换能器接收返回的超声波能量并进行处理，以准确地确定换能器与接收超声能量的物体上的点之间的距离。 关于处理，利用了许多关系。 使用某些关系，使用高频和低频超声波能量以及传播时间来确定整数范围。 使用某些其他已知的关系也对高频和低频中的每一个进行时间相关的相移确定。 使用距离值的范围和测量的时间相关值，可以准确地确定从换能器到物体的距离。 在一个应用中，获得许多不同的距离值来定义物体的表面，例如轮或轮胎。