Title :
A low-cost water sensing method for adaptive control of furrow irrigation
Author :
Turnell, D.J. ; Deep, G.S. ; Freire, R.C.S.
Author_Institution :
COPELE, Univ. Federal da Paraiba, Brazil
Abstract :
A computer-based optimization technique for furrow irrigation depends upon a network of water sensors to detect the water advance in the initial phase of the irrigation. This paper describes a new type of low-cost water sensing network developed specifically for this technique. Each sensing network consists of up to fourteen simple water sensors baked using inexpensive twin-wire. The distance between the computer and the last sensor can be up to 1000 m. Each sensor uses the variation of capacitance to detect the presence of water and communicates its state to the base computer by means of variable-frequency current pulses
Keywords :
adaptive control; agriculture; capacitance measurement; chemical sensors; chemical variables measurement; computerised control; computerised instrumentation; electric sensing devices; water; 1000 m; adaptive control; capacitance; computer-based optimization; furrow irrigation; interface; sensing network; twin-wire; variable-frequency current pulses; water sensing method; water sensors; Adaptive control; Application software; Capacitance; Capacitive sensors; Computer networks; Electronic mail; Irrigation; Phase detection; Registers; Voltage;
Conference_Titel :
Instrumentation and Measurement Technology Conference, 1996. IMTC-96. Conference Proceedings. Quality Measurements: The Indispensable Bridge between Theory and Reality., IEEE
Conference_Location :
Brussels
Print_ISBN :
0-7803-3312-8
DOI :
10.1109/IMTC.1996.507593
