| 摘要 |
<p>PURPOSE: To improve the monitoring function by dividing only a radar-module into a nearly monitoring radar-module and a remote monitoring radar-module, and controlling the operations of both the monitoring radar modules to detect the distance to an object. CONSTITUTION: In a nearly monitoring radar-module 10 in which a delay circuit DL is inserted, a reflecting body is apparently moved away from a vehicle to improve the nearly monitoring function. Due to insertion of the delay circuit DL, an insertion loss is added, and power for transmitting and receiving radio waves is reduced to reduce the distance to be monitored, but in this case there is no problem for the purpose of monitoring the neighborhood. With a remote monitoring radar-module 20, the delay circuit DL is not inserted to cause the damage to the nearly monitoring function, but there is no problem for the purpose of remote monitoring. Further, due to the removal of the delay circuit, power for radiating radio waves is increased by the amount equivalent to the delay circuit insertion loss, and the long distance monitoring function is strengthened. A monitor and control device 30 controls the operations of the respective radar-modules 10, 20 to detect the distance to an object.</p> |
