Patent ID: 9046461
Filing Date: 2015-06-02
Classification: G01N,G08C,H04W,Y10T

Abstract:
1. A wireless soil sensor comprising: a microcontroller; an antenna; an amplifier; a probe conducting structure to be placed in the material forming a capacitor connected to a soil moisture circuit; a soil moisture circuit comprising a high frequency oscillator for applying electrical stimulus to the probe structure, a known reference capacitor connected in series to the high frequency oscillator, and a first voltage meter located between the high frequency oscillator and the reference capacitor; a soil salinity circuit comprising a low frequency oscillator for applying electrical stimulus to the probe structure, a known reference resistor connected in series to the low frequency oscillator, and a second voltage meter located between the low frequency oscillator and the reference resistor; wherein the respective circuits connect between the reference capacitor and the reference resistor, at which point the circuits are connected to the probe structure and a third voltage meter; and wherein the amplifier varies a power transmission to the antenna based on a real-time soil conductivity value of a soil area and a real-time soil dielectric constant value of a soil area to improve a communication range and communication reliability of the antenna.