SENSORS Figure 2: Murata’s three-in-one soil sensor
allowing different parameters to be examined simultaneously. These functions are: A nine-electro sensor element, via which EC can be determined.
A moisture sensor element that measures electrical permittivity, so as to give a value for A temperature sensor element. The nine-electrode EC sensor is unique to the industry. This enables multiple measuring patterns to be generated, thereby eliminating uncertainty about the results derived. The moisture sensor covers a VWC range from 0 to 60% and maintains a full-scale moisture accuracy of ±3%. The temperature sensor
supports a -20°C to 60°C temperature range with a ±1.0°C accuracy, and features a proprietary algorithm that compensates measurements. An additional proprietary algorithm has been incorporated into the the fertiliser content can also be obtained (so The Murata soil sensor device delivers elevated accuracy, while still being more cost-effective than competing solutions. It is housed in a robust IP68-rated enclosure, to safeguard against dust and liquid ingress. There is a choice of UART, RS232E,
RS485-MODBUS and SDI-12 wireline interface options available, as well as support for wireless connectivity through a Bluetooth LE transceiver. The sensor’s data acquisition times are simple to adjust. With readings being taken at 30min intervals, three AA batteries will be able to power it for a period of at least 6 months before they need replacing. Prior to releasing this solution, Murata undertook extensive testing in farming locations across Asia. Here it was successfully fertiliser usage in fruit orchards and irrigation grown.
Conclusion
A digital transformation of the agricultural sector must be initiated if the food supply chain is to be strengthened and shortage issues mitigated. Engineering innovations, like the three-in-one soil sensor just described, have the potential to make a substantial contribution to farming becoming more data- driven, leading to productivity being increased and running costs lowered.
Murata
www.murata.com
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