| 摘要 |
<p>PURPOSE:To easily discriminate unstable reflection from reflection from a small body to be detected by providing an A/D converting circuit, a coordinate converting means, a conversion memory, an identical address deciding means, a signal processing circuit, etc. CONSTITUTION:When received data which is converted by an A/D converting circuit 11 is written as display data in a display memory 17 whose address is specified with orthogonal coordinates outputted by the coordinate converting circuit 12, a signal processing circuit 13 reads the last display data which is stored and inputs it to an address of the conversion memory 15 together with the received data. The memory 15 outputs converted data according to a conversion table selected with a decision signal from the identical address deciding circuit 14. The circuit 13 writes the converted data as new display data in the memory 17. Then, the ways of data conversion are changed according whether the last display data stored in the memory; coincides with the orthogonal coordinates of the received data obtained later >=2 times or not, thereby displaying the converted data.</p> |
