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Wireless telemetry system

22nd September 2017

Posted By Paul Boughton


A critical component of farm operations, irrigation systems ensure regular water distribution to crops using a system of pumps, piping and sprayers.

As water becomes a more scarce resource and affects operational costs, farmers must find ways to more precisely manage agricultural irrigation systems to help conserve water supplies while also operating more profitability.

On many farms, monitoring the irrigation system remains a manual chore.

Workers travel throughout the many acres of the farm to manually check meters, then record and aggregate measurements to determine the status of operations.

In some cases, farms do not have meters and rely on sight to decide if operations seem to be working correctly.

As a result, farm operators cannot readily identify potential issues with pressures in spray nozzles that disperse chemicals over crops or an abnormally high electric current draw from pumps.

Bottom line, they don’t even know how much water or chemicals are being used to feed crops.

As agriculture is a large consumer of the earth’s freshwater supply, farmers must employ better management practices to efficiently operate their irrigation systems.

A SignalFire Remote Sensing System (SFRSS) gives farmers and water districts the ability to remotely monitor and control different factors of the irrigation system from the convenience of a tablet, computer or even a mobile phone.

Instead of traveling to multiple locations to manually collect data for analysis, the SFRSS can provide real-time status on water pressure, pump usage, pump water flow, water tank levels and other critical operating parameters.

Using this data, farmers can analyse trends, determine smart irrigation based on weather conditions and calculate/analyse water usage and costs. An irrigation dashboard also supports more accurate planning of maintenance based on equipment condition.

The SFRSS employs radio nodes to extract and transmit data from sensors to a gateway that serves as the central processing hub.

Fuelled by built-in batteries or solar power, the nodes power the sensors for a truly wireless system.

The gateway delivers the intelligent information to an off-the-shelf supervisory system using Modbus protocol over Ethernet.

Sensor agnostic, the SignalFire wireless telemetry system allows farm operators to specify different sensor types to monitor an agricultural irrigation system.

Farms can use pressure sensors to track pump and spray nozzle pressure, electric clamp-on current meters to measure the pump current draw, flow meters to measure water and chemical usage and level sensors to monitor the levels of water storage tanks in one network.

Because the SignalFire solution can work as a mesh, nodes can hop over miles of distance, from one crop field to another, back to a gateway located at the point of monitoring such as the headquarters of the irrigation district.

An Ethernet interface module connects the gateway to a local area network (LAN), a WI-FI network, or a cellular modem, bringing the information to the field operators.

In a farming environment, a wireless system must be able to spread over many square miles. The mesh network of the SFRSS permits many wireless devices to self-configure into a web-like structure over large areas regardless of hills, buildings and other structures.

Robust gateways can accommodate hundreds of transceiver inputs from the multiple field sensors, enabling the network to cover a geographic range of a mega farm of 10,000 acres that roughly equals 15 square miles.

Using the SFRSS to monitor and control farm irrigation system operations, farmers can cost effectively:

* Use a broad range of sensors to assess different operating parameters

* Broadcast information over long ranges

* Download and integrate sensor data to a PLC within a control room

* Conduct analytics to improve irrigation system operation and water efficiency

* Reduce costs by operating with lower water supplies

* Ensure compliance with regulations regarding water usage

* Verify correct billing of water usage

* Comply with environmental sustainability

By implementing the SFRSS, farmers gain better control and visibility over the operations of their irrigation systems to save money while using water more responsibly.









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