| 摘要 |
<p>PROBLEM TO BE SOLVED: To decide the state in which a pulse wave emission source of a radar or the like moving at a constant velocity approaches/recedes and grasp an advance direction in a simple constitution. SOLUTION: There are provided a state decision circuit which decides the state of the approach/receding of the pulse wave emission source of the radar or the like moving at the constant velocity and an advance direction-calculating circuit which calculates the advance direction by measuring an azimuth in which pulse waves come with respect to the pulse wave emission source at constant time intervals.θA,θB andθC and rA, rB and rC are measured azimuths and distances at A, B and C points when the pulse waves coming from the pulse wave emission source of the radar or the like moving at the constant velocity are measured at the constant time intervals. Since a distance ratio of rA and rC is obtained from theθA,θB andθC, the state of the approach/ receding of the emission source can be detected. Further, the advance direction of the emission source can be detected by obtaining theθ.</p> |
