| 摘要 |
PROBLEM TO BE SOLVED: To provide an ultrasonic surveyor effectively removable of the disturbance due to mutual interference of other devices. SOLUTION: The ultrasonic surveyor comprises a transmitting part transmitting ultrasonic signal, a receiving part consisting of a plurality of receiving element receiving a reflection wave of an object of the transmitted ultrasonic signal and outputting the received signal, an azimuth detector detecting the azimuth of the object from the arrangement of a plurality of receiving element and the phase difference between the received signals output from each receiving element, a distance/reflection intensity detector detecting the distance to the reflection object and reflection intensity from the appearing time point and amplitude of the received signal, and an indication processor indicating on a screen, the reflection object by using the detected azimuth, distance and reflection intensity. The indication processor comprises a means detecting the interference with other devices from the fact that the amplitude ratio of the newest received signal obtained by the newest operation at the same sampling points defined at the transmission time point as a reference to the received signal obtained at the previous transmission/reception operation is over a specific value, and indicating them on a screen, the data for display detected from the previously received signal instead of the newest received signal. COPYRIGHT: (C)2004,JPO
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