| 摘要 |
<p>A wide monitor area can be covered by switching the connection between a plurality of sensors (102-1ˆ¼102-m, A1ˆ¼A4, 601ˆ¼605) and a transmission/reception device (101, 200, 209, 210) using a switch device (103, 201, 202, 606) of a target detection apparatus in a time division manner. When only two target detection apparatuses (S 1 , S 2 ) are used in positioning a target, the position of a target can be identified according to the information about an area (402) common to both angle ranges (SR 11 , SR 12 , SR 13 , SR 21 , SR 22 , SR 23 ) covered by the two apparatuses or the total propagation distance information from one apparatus to the other apparatus through each target.</p> |
