| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide an inexpensive approach alarm device related to the prevention of collision of an aircraft and a ship. SOLUTION: This approach alarm device is provided with a signal generation part 101 which recognizes its own identification number and generates it as a send signal, a small power radio part 102 which receives a signal generated in the signal generation part 101 and receives a signal of the other machine, a level judging part 103 judging the strength of the received signal, a received signal processing part 104 which generates or releases alarm and identifies a mate based on the judged received signal, and a display and operation part 105 which sets judgement distance, displays information of approaching mate, and generates and releases alarm.</p> |
