| 摘要 |
The disclosed device includes a module for transmitting an ultrasonic wave from a transducer to an object, another module for receiving with transducers surface waves that are a reflection of the ultrasonic wave on the object surface, another module for detecting an incoming direction of the reflected wave to each transducer group using a time difference between reception timings of two reception transducers constituting each group, each group having two transducers adjacent to each other, another module for detecting a propagation time of the surface wave reached each group using a received wave signal of the surface wave of at least one of the reception transducers, another module for detecting a reflection point of the ultrasonic wave on the object surface based on the incoming direction and the propagation time of the surface wave detected for each group, and another module for deriving a shape of the object surface using the reflection points for the transducer groups.
|
