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The soil moisture and drought monitoring sensors can be buried in different depths in the soil. Combined with GIS software, soil moisture information can be monitored in all directions. Zigbee-based nodes are simple to lay, and only one sensor needs to be placed at intervals, and all sensors are automatically networked. GPRS communication technology has the advantages of wide coverage, billing by volume, fast access, etc. It has good advantages in remote bursty data transmission. Zigbee networks and zigbee and smart terminals can be used to achieve long-distance data transmission, which is suitable for bursty data transmission. The data transmission module of the soil moisture and drought monitoring instrument adopts a data transmission method combining a zigbee network and a GPRS network.
It overcomes the complexity of wiring and restrictions on the area in wired transmission. Zigbee technology is a low cost, low power consumption. Near-field wireless networking communication technology, with advantages of self-organizing network, self-healing, multi-networking mode, and three-level security mode, facilitates the establishment of wireless networks. Combining zigbee technology for short-distance networking and GPRS technology for long-distance data transmission, the performance of soil moisture and drought monitoring system is more superior, the price is lower, and it is easier to promote in reality.
The intelligent terminal part is mainly based on the previous research content in the soil moisture and drought monitoring instrument, combined with GIS technology, comprehensive soil temperature and humidity, the latitude and longitude of the collection point, and comprehensively displaying soil moisture information to users. The system is based on GIS, with Win7 system operating environment as the platform, database and model library as the management core, and object-oriented C# language as the implementation language.
In electroplating process, in order to improve the quality of the coating, a variety of chemicals need to be added to the bath. These chemicals are collectively called plating additives. Electroplating additives are mostly organic compounds, which can be divided into complexing agent, brightener and auxiliary brightener, leveling agent, pinhole remover, dispersant, wetting agent, smoke inhibitor and so on according to their working months in the electroplating bath.
Soil moisture and drought monitoring monitor the quality of soil moisture, depending on the number of monitoring points. Excessive monitoring points will increase the monitoring effect, but it will make the system's investment too large. Therefore, it is very necessary to select a reasonable number of monitoring points. When deploying soil moisture monitoring points, a node is placed every twenty-two square meters with a certain distance between the sampling points. Once the location of the sampling points is determined, it should be kept relatively stable.
August 28, 2021