运用北斗双星导航定位系统的双向短报文通信技术，实现了区域报警和行驶车队之间的通信以及寻迹。
It also realizes area alarm, communication and seeking among the running vehicles depending on BeiDou 's both-direction and short-message communicating technique.
运用北斗双星导航定位系统的双向短报文通信技术，实现了区域报警和行驶车队之间的通信以及寻迹。
It also realizes area alarm, communication and seeking among the running vehicles depending on BeiDou's both-direction and short-message communicating tech...
控制单元将各子区域背景声音信号电平与各对应设置的子区域报警阈值电平比较，在某子区域背景声音信号电平大于该子区域所设置的报警阈值电平时控制告警。
Modulator mixes point sound signal output by its subordinate multiple detectors to background sound in the sub area and sends it to control unit to realize background sound reproduction.
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