Wireless sensor and monitoring, is the escort towers run -

According to rend and maim, consulting, now many village during peak water or electricity through the water tower water supply. To keep enough pressure, these towers built deliberately is higher, and then through the pump by gravitational distribution network to supply water to the water every family. Because the daily water pressure requirements of the residence in 0. 31 ~ 0. Between 55 mpa, so the water tower of average height must be 50 meters can provide 0. 34 ~ 0. The pressure of the 41 mpa.

this requires council must constantly monitor water supply system, in order to ensure adequate water pressure and water level. Hydraulic pressure control is crucial, whether it's too high or too low, could cause the damage of low system efficiency or for water pump. Usually, the pressure sensor installed in the water tank of water tower, by measuring the hydraulic pressure to determine the water level. At the same time, the pressure sensor can also be placed in the monitoring of water pump and drainage pump. Through the remote sensor control system, operators need to climb to the top of tower or to read the pressure sensor monitoring instrument, different places information will direct input to the computer for analysis. Water supply system running environment, however, is not conducive to the cable on the implementation of the monitoring system.

when run in the external environment, the cable system is easily affected by lightning and grounding fault, the sensor and connection of equipment will be damaged. At the same time, for cable system, the voltage is also a problem, because foreign tank usually can only provide 120 v ac voltage. Plus cable system also requires that every sensor connection back to the controller and connect to the port, because of water tower height, hard wired sensors of the maintenance cost is very high.

wireless remote monitoring system architecture is similar to the cable system, by using 'air wire' instead of the cable to measure the water tower water pressure and transmitted to a remote location. Wireless telemetry system is composed of many terminal nodes, including for power supply of radio sensor, the system can measure the pressure of transmission to the gateway. By the battery power terminal nodes to solve without power or power unstable region using sensors of this difficult problem. As receiving measurement data at the center of the hub and gateway to the Modbus format to store recent sensor data, so that the programmable logic controller ( PLC） Through the control center or Internet connection for a visit.

gateway can be physical connection to the PLC controller, the data acquisition and monitoring control system ( SCADA） , distributed control system ( DCS） Cellular modems, or used for wireless connectivity. Don't need 2. 4 GHZ wireless network, and just use 900 MHZ, wireless network can be in different topography, structure, and provide powerful data transmission, weather conditions and can run for many years in the harsh environment conditions. As there is no physical connection nodes and other components, wireless system to reduce the risk caused by lightning or ground fault, but the cable system was not able to survive. Figure 1 shows a wireless remote sensor system's work in the water tower water distribution system configuration. Integration of sensor nodes, See figure 2) Including pressure sensor, wireless nodes and intrinsically safe built-in battery, install it on the water tower and water pump, used for monitoring the water level and water pressure. Without buying pressure sensor and wireless nodes, specifically the integration of sensor nodes can be as the pressure in the pipeline and cable sensors and other sensor economical alternative to solution.

figure 1: wireless remote sensor system's work in the water distribution system configuration

in the wireless monitoring network, as many as 240 integrated sensor node distribution in different locations to provide feedback, to verify that the water level, and ensure that the system has enough pressure supply water to the user. After the data sent to the gateway, the gateway in various formats to transmit the data again, such as 4 ~ 20 ma, or the format of the Modbus. By adding the Ethernet interface module ( 以太网) Connection, gateway has become a local area network ( LAN） And Wi - Fi network part of or in connection with the cellular modem connection, pass information to a laptop or a smartphone. Maintenance personnel can by monitoring the water level of the intelligent mobile phone, computer or command center, can make the dispatching terminal operators in the business intelligence dashboard view the running state.

Pressure Scout wireless Pressure transmitter, Pressure sensor and set the radio has a built-in battery of intrinsically safe circuit, can be used as a conduit, cable and other Pressure sensor economical alternative to solution. The telemetry system for wireless industrial applications to provide easy to use and reliable pressure measurement.

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