| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide an aperture synthesys survey device having a good resolution by correctly estimating the speed of a propagation wave even when the speed thereof is changed in internally surveying underground or concrete. SOLUTION: The survey device is provided with a transmitter-receiver accommodating a transmitter and receiver of propagation waves, a moving position detecting sensor provided with the transmitter-receiver, and a display device for displaying the results of signal processing using a detected position signal. Based on reflection echo data obtained by transmitting and receiving a propagation wave whenever the transmitter-receiver moves a given distance and a position signal of the transmitter-receiver measured at the same time of transmission-reception, a plurality of images obtained by modifying the speed of the propagation wave as a parameter are compared with each other. Then, the speed of propagation wave is estimated based on the degree of concentration and strength of image data, thereby good survey images can be obtained.</p> |
