DocumentCode
3300648
Title
Wireless soil moisture sensor based on fringing capacitance
Author
Wobschall, Darold ; Lakshmanan, Deepak
Author_Institution
Esensors, Inc., Amherst
fYear
2005
fDate
Oct. 30 2005-Nov. 3 2005
Abstract
A soil moisture sensor was developed which was based on fringing capacitance and the increase in dielectric constant of a soil-water mixture with water content. The frequency shift of an RC oscillator connected to the capacitance sensor electrode was measured by a microcontroller. The data, in IEEE 1451 format, is communicated by a built-in RF transmitter (433MHz) to a receiver or base station for logging and display. This battery-operated sensor/transmitter is expected to have an operational life of several years
Keywords
capacitive sensors; hygrometers; moisture measurement; permittivity measurement; soil; 433 MHz; IEEE 1451 format; RC oscillator; RF receiver; RF transmitter; battery operated sensor; capacitance sensor electrode; dielectric constant; frequency shift; fringing capacitance; microcontroller; soil-water mixture; water content; wireless soil moisture sensor; Capacitance measurement; Capacitive sensors; Dielectric constant; Dielectric measurements; Electrodes; Frequency; Oscillators; Soil moisture; Transmitters; Wireless sensor networks;
fLanguage
English
Publisher
ieee
Conference_Titel
Sensors, 2005 IEEE
Conference_Location
Irvine, CA
Print_ISBN
0-7803-9056-3
Type
conf
DOI
10.1109/ICSENS.2005.1597624
Filename
1597624
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