CN103024941A - System and method for real-time hydrologic monitoring and transmission based on wireless sensor network - Google Patents

Abstract

The invention discloses a method for real-time hydrologic monitoring and transmission based on a wireless sensor network. A system comprises a plurality of water surface nodes and a data terminal, the water surface nodes include general nodes and a hub node with a telecommunication function, the general nodes are used for acquiring underwater sensor data, the underwater sensor data are compressed and sent in a free wireless communication manner, an ad hoc network among the nodes converges information to the hub node, the hub node sends the information to the data terminal by means of charged wireless communication or satellite communication, and the data terminal has the functions of data processing, data storage, warning judgment, warning information sending and the like. The system and the method can be used for long-term observation of underwater physical, chemical and biological parameters in the field of scientific investigation, can be used for environmental monitoring and pollution warning of riverways and coastal waters and forecasting of disasters such as flood, tsunami and red tide, and have the advantages of low equipment cost, low communication cost, capability of achieving long-term continuous use and avoiding data to be tampered, high automation degree, no secondary pollution and the like.

Description

A real-time hydrological monitoring transmission system and method based on wireless sensor network

technical field

The present invention relates to an underwater monitoring method, in particular to a real-time hydrological monitoring transmission system and method based on a wireless sensor network.

Background technique

With the rapid economic development and the rapid improvement of industrialization, while bringing many conveniences to life, sewage and gas emissions have brought negative impacts on the environment. In particular, inland rivers and coastal waters are most affected because they are closer to the land, and the pollution of the water environment and atmospheric environment will have an impact on the global ecosystem and climate system in the next few decades or hundreds of years. In addition, natural disasters in inland rivers and near seas threaten the production and life along the coast at any time.

At present, the detection methods for underwater environmental information mainly include: 1) satellite remote sensing; 2) radar monitoring; 3) marine survey ships; 3) fixed marine monitoring stations, etc. In addition to these traditional observation methods, with the advancement of submarine observation network and underwater vehicle technology, humans can get closer to the seabed to obtain high-resolution observation data. It can be said that the monitoring of the ocean is developing towards a three-dimensional "satellite-land-sea-underwater", and the monitoring projects are also developing towards "diversification". However, due to the impact of human life and production on river courses and offshore areas, and the complex and changeable time and space, it is impossible to meet the demand only by relying on these regular and fixed-point observation densities. For severe pollution incidents or natural disasters, failing to give timely warning will cause serious emergency losses and even casualties.

Contents of the invention

Aiming at the deficiencies of the prior art, the invention proposes a real-time hydrological monitoring transmission system and method based on a wireless sensor network.

A real-time hydrological monitoring transmission system based on a wireless sensor network includes a plurality of common nodes and a central node, and the common nodes include GPS antennas, solar sails, solar panel controllers, batteries, measurement and control modules, and ZigBee wireless communication modules , floats and cables; the solar panel is connected to the power input end of the solar panel controller, the power output end of the solar panel controller is connected to the power input end of the measurement and control module, and the solar panel controller is connected to a storage battery. The measurement and control module is connected with the ZigBee wireless communication module signal, and the measurement and control unit is provided with a plurality of sensor receiving ports; The wireless communication module is arranged in the buoy, and the buoy is fixedly connected to the bottom of the sea through cables. The central node includes a common node and a GPRS module, wherein the measurement and control unit on the common node is connected to the GPRS module by signal.

A real-time hydrological monitoring transmission method based on a wireless sensor network: the input analog signal is processed (filtering, amplification, limiting, level conversion) by the conditioning circuit in the measurement and control module into a signal suitable for collection. The measurement and control module collects data according to the determined sampling period, and after fusion with the digital sensor signal coming in through the serial port, saves and selects the optimal path to send the information. If the sending fails, the sending is performed in the order of resending, selecting the suboptimal path to send, and waiting for resending The task returns to the next collection and sending cycle until it succeeds. When the final data cannot be sent, it will record the error message and start the next new cycle sending cycle. When the node position moves, the battery voltage is too low, water leakage and its own circuit failure, it will send an alarm message.

The method for sending alarm information: dividing the alarm level of the sensor according to the comparison result of the measured value and the threshold value, reorganizing the alarm level information of multiple sensors, and calculating the alarm level of different nodes. Send information from the central node to the land terminal in sequence according to the priority.

Save the data before the data is sent, and get the data by sending the calling command through the terminal or sending out the external output port of the node or extracting it from the node.

The topology structure is input around the node, so that the node can calculate the optimal and suboptimal route as the candidate of the sending path according to the known topology structure.

Beneficial effects: the invention has low cost, low power consumption, high integration, low communication cost, long-term continuous use, high degree of automation, no data loss, no secondary pollution and the like.

Description of drawings

Figure 1 is a schematic diagram of a real-time underwater information monitoring system based on sensor networks.

Figure 2 is a diagram of the sensor node configuration.

Figure 3 is a flow chart of data collection and return.

Figure 4 Calculation method of alarm level.

Detailed ways

The implementation of the present invention will be further described in detail below in conjunction with the accompanying drawings.

As shown in Figure 1 and Figure 2, a real-time hydrological monitoring and transmission system based on wireless sensor networks includes a plurality of common nodes and central nodes, and the common nodes include GPS antennas, solar sails, solar panel controllers, Storage battery, measurement and control module, ZigBee wireless communication module, float and cable; Described solar sail board is connected with the power input end of solar panel controller, the power output end of solar panel controller is connected with the power input end of measurement and control module, solar energy The battery panel controller is connected with a storage battery in addition, and the measurement and control module is connected with the ZigBee wireless communication module signal. The measurement and control unit is provided with a plurality of sensor receiving ports; The board controller, storage battery, measurement and control unit, and wireless communication module are arranged in the buoy, and the buoy is fixedly connected to the seabed through cables. The central node includes a common node and a GPRS module, wherein the measurement and control unit on the common node is connected to the GPRS module by signal.

As shown in Figure 3, a real-time hydrological monitoring transmission method based on a wireless sensor network: the input analog signal is processed by the conditioning circuit in the measurement and control module (filtering, amplification, limiting, level conversion) into a suitable collected signal. The measurement and control module collects data according to the determined sampling period, and after fusion with the digital sensor signal coming in through the serial port, saves and selects the optimal path to send the information. If the sending fails, the sending is performed in the order of resending, selecting the suboptimal path to send, and waiting for resending The task returns to the next collection and sending cycle until it succeeds. When the final data cannot be sent, it will record the error message and start the next new cycle sending cycle. Save the data before the data is sent, and get the data by sending the calling command through the terminal or sending out the external output port of the node or extracting it from the node. Input the topological structure around the node, so that the node can calculate the optimal and suboptimal route as the candidate of the sending path according to the known topology. When the node position moves, the battery voltage is too low, water leakage and its own circuit failure, it will send an alarm message. As shown in FIG. 4 , the method for sending alarm information: divide the alarm level of the sensor according to the comparison result of the measured value and the threshold value, reorganize the alarm level information of multiple sensors, and calculate the alarm level of different nodes. Send information from the central node to the land terminal in sequence according to the priority.

Claims (5)

1. A real-time hydrological monitoring transmission system based on a wireless sensor network includes a plurality of common nodes and a central node, and is characterized in that: the common nodes include GPS antennas, solar sails, solar panel controllers, accumulators, measurement and control Module, ZigBee wireless communication module, float and cable; Described solar panel is connected with the power input end of solar panel controller, and the power output end of solar panel controller is connected with the power input end of measurement and control module, and solar panel control The device is connected with a storage battery in addition, and the measurement and control module is connected with the ZigBee wireless communication module signal. The measurement and control unit is provided with a plurality of sensor receiving ports; , storage battery, measurement and control unit, and wireless communication module are arranged in the buoy, and the buoy is fixedly connected to the seabed through a cable. The central node includes a common node and a GPRS module, wherein the measurement and control unit on the common node is connected to the GPRS module. 2. A real-time hydrological monitoring transmission method based on wireless sensor network, it is characterized in that: the analog signal of input is processed by the conditioning circuit in the measurement and control module, and the measurement and control module collects data according to the sampling period determined, and comes in with the serial port After the digital sensor signal is fused, save and select the optimal path to send the information. If the transmission fails, execute the sending task in the order of resending, selecting the suboptimal path to send, and waiting for resending until it succeeds and returns to the next collection and sending cycle. When the final data If it cannot be sent, it will record the error message and start the next new cycle of sending cycle. When the node position moves, the battery voltage is too low, water leakage and its own circuit failure, the alarm message will be sent. 3. a kind of real-time hydrological monitoring transmission method based on wireless sensor network according to claim 2, it is characterized in that: described sending alarm message method is the alarm level of dividing sensor according to the comparison result of measured value and threshold value, and Reorganize the alarm level information of multiple sensors, calculate the alarm level of different nodes, and send information from the central node to the land terminal according to the priority level. 4. a kind of real-time hydrological monitoring transmission method based on wireless sensor network according to claim 2, it is characterized in that: save data before data transmission, can send calling command or node external output port to transmit or from The method of extraction within the node gets this data. 5. A kind of real-time hydrological monitoring transmission method based on wireless sensor network according to claim 2, it is characterized in that: node peripheral input topology, so that node calculates optimal, suboptimal route as sending according to known topology Alternatives to the path.

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