Study On Groundwater Monitoring System Based On Intelligent Network Sensing Technology

Groundwater resources is closely related to the development of the national economy, ecological balance, environmental protection and the lives of people ,and it plays an important role in protecting people lives , supporting economic and social development and maintaining ecological balance, However, due to the illegitimate exploitation of groundwater in the life and production of human, with the result that the level of ground water declined, water polluted and deteriorated, and the limited water resources became more and more tense. In order to protect the limited water resources, rationally develop and utilize them, we must monitor the groundwater all the time and take appropriate measures to adjust the negative dynamic trend promptly. So it has a realistic social significance to monitor the groundwater.In this paper, both the home and abroad on groundwater monitoring system were studied contrastively, then discuss the intelligent network sensing technology, features and system structure detailedly, compare with the traditional sensor, monitor the water level, water temperature, water quality and water parameters by the intelligent sensor, then use the embedded SCM to complete processing of the data and collect the equipments' operating parameters, status and malfunction and real-time monitoring information continuously, realize the wireless transmit of data through the TC35 module of GSM, at last, constitute a intellectualized sensor networks for the dynamic monitoring of the groundwater.System uses a modular design, which forms a groundwater monitoring system consists of the sensor module, signal conversion modules, data-processing modules, wireless transmission modules. Sensor module is composed of sensor circuit, modulation circuit and analog signal switch. Sensor converts water level, water temperature, water quality, water quantity and other signals into electrical signals, which switched by analog signal switches. Signals share a signal amplifiers and an A / D converter circuit, and choosed by the control signal given from the control circuit, then enlarged by the modulation circuit and exported in the form of analog signals. Signal conversion modules are composed of the A / D converter chip and the external circuit, and those modules switche the analog signals into digital signals, which are transported to the P2 mouth of the SCM. Data processing module consists of SCM modules, alarm modules. The SCM unit is responsible for the data processing and data transmitting, and it controls the alarm unit, conversion units, regular work and so on. Alarm unit controlled by the embedded phone module uses the design method of annunciator to realize data transmission and alarm functions. Wireless transmission modules use GSM network to complete data communications by TC35 data module. They are linked with serial port, through which exchange of datas, and they can complete two-way wireless communication that transmit the orders received from the central node to the sensors and send the digital signal sent by sensors to the central node. Then, a groundwater monitoring wireless network system is formed by the above four modules. The system has the functions such as data acquisition function, alarm functions, network communication functions. It can automatically gather, storage and transmit parameters including water temperature, water quality and water quantity, and can ensure that the monitoring equipment and monitoring data is stable and reliable.In addition, the system uses GSM wireless network as a data transmission network, which can quickly and reliably achieve data transmission in the sensor network, make the digitization and network of groundwater monitoring system come ture, and can meet the demand of dynamic and real-time monitoring of groundwater.