Three types of wireless transmission modes for agricultural environmental monitoring stations
The agricultural environmental monitoring station is a combination of multi-functional instruments. It can measure a maximum of multiple parameters, including wind speed, sunshine, carbon dioxide, temperature and humidity, air pressure, soil moisture, and more than 12 parameters, including almost all environmental meteorological factors. The comprehensive monitoring station for agricultural environment is widely used in various fields such as the construction of weather stations, climate monitoring of agriculture and forestry, ecological environment monitoring, greenhouse control, highway and railway operations, and geological disaster monitoring, and provides various departments with the convenience of measuring environmental parameters. Compared with small weather stations, its functions are more complete, and more importantly, its data transmission has already achieved wireless transmission, which greatly improves work efficiency.
Long-distance wireless data transmission: It adopts GPRS, GSM and 3G transmission methods and is mainly suitable for sending and receiving data between cities in different cities.
The GPRS communication method is to upload data through the GPRS after the collection point collects data. The user can use any computer that can access the Internet to log in and check the data, which is stable and reliable, and solves the trouble that the peers using China Mobile's wireless IP transmission and communication are often dropped. The data is stable and reliable without worrying about the trouble of sudden disconnection. The communication fee is based on the flow rate fee (this communication method has low cost and no delay).
The GSM communication mode uses the short message mode to transparently transmit data. As long as the mobile network signal coverage area can carry out digital transmission, it is not limited by the geographical environment. It is convenient for users with longer collection intervals and send it to the user's setting. On the mobile phone number or on the designated computer, the communication fee is calculated according to China Mobile's tariff (the cost of this communication method is higher, and the delay phenomenon occasionally occurs).
3G communication uses the network provided by the three major operators to upload data from the collection point. Similarly, users can view data on any computer through a network connection. The advantage of 3G is that the number of transmissions is fast and stable, and data with a large transmission capacity is widely available. Used in video transmission and other fields. The disadvantage is that the network coverage is small. However, this communication method is the trend of future development.
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