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A wireless sensor network for soil EC measurement

机译：用于土壤EC测量的无线传感器网络

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摘要

It is the foundation of precision agriculture to collect comprehensive information on water, soil, plants, and the environment in the field. A wireless sensor network (WSN) is a new platform for real-time information access, and soil electrical conductivity (EC) is one of the most important indicators of soil variability because it is an integration of the physico-chemical properties of soil. Therefore, a WSN for monitoring soil EC is developed. The WSN is equipped with soil EC sensor nodes and a coordinator based on ZigBee. The sensor nodes adopt a four-electrode method and consist of two units: a probe unit, and a processing and communication unit. The probe unit injects a constant electrical current into the soil and detects the voltage drop between two output electrodes. Data are then transmitted to the ZigBee coordinator. The coordinator consists of a keyboard module, an LCD display module, and an RS232 transceiver. The RS232 transceiver connects the personal computer and the coordinator. Finally, soil EC is calculated using the voltage drop received from the sensors. Performance tests are implemented to check the correlation between the measured voltageand soil EC, and that between soil EC and ammonia nitrogen content. Results showed that the soil EC WSN provided highly accurate performance in both experiments, indicating that the developed platform is effective and reliable.
机译：它是精密农业的基础，收集水，土壤，植物和环境中环境的综合信息。无线传感器网络（WSN）是实时信息访问的新平台，土壤导电性（EC）是土壤变异性最重要指标之一，因为它是土壤的物理化学性质的整合。因此，开发了用于监测土壤EC的WSN。 WSN配备了土壤EC传感器节点和基于ZigBee的协调器。传感器节点采用四电极方法，包括两个单元：探头单元和处理和通信单元。探头单元将恒定的电流注入到土壤中并检测两个输出电极之间的电压降。然后将数据发送到ZigBee协调器。协调器包括键盘模块，LCD显示模块和RS232收发器。 RS232收发器连接个人计算机和协调员。最后，使用从传感器接收的电压降计算土壤EC。实施性能测试以检查测量的Voltageand土壤EC之间的相关性，以及在土壤EC和氨氮含量之间的相关性。结果表明，土壤EC WSN在两种实验中提供了高精度的性能，表明开发平台有效可靠。

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