国产欧美精品一区二区,中文字幕专区在线亚洲,国产精品美女网站在线观看,艾秋果冻传媒2021精品,在线免费一区二区,久久久久久青草大香综合精品,日韩美aaa特级毛片,欧美成人精品午夜免费影视

The currently available systems for monitoring environmental and air qualities are complex to operate, have insufficient display and control functions, and are unable to issue alarms remotely. Hence, in this paper, we design a system for monitoring environmental quality using Beidou satellites and ZigBee. By automatically forming a network, the proposed system can measure indicators about air humidity, temperature and smoke, and issue alarms. The major control module of the collection terminal is responsible for collecting sensor data, displaying information and setting up parameters. The digital temperature and humidity sensors and the ionic smoke sensors are used to measure the air indicators in real-time, which are then transmitted via the wireless local network consisting the ZigBee routes in each sub-module and the terminal nodes. All the data are aggregated and transmitted by the ZigBee coordinator nodes in real-time through the Beidou satellite network. By doing this, we manage to monitor the air quality remotely. The experiments show that the system can transmit data reliably, Temperature error value is less than 2.5%, humidity value error less than 4%,be used in a broad variety of domains and cover wide areas. Following the future trend of issuing alarms smartly, the system is practically useful and can be introduced to other applications.