15-02-2017, 10:34 AM
The simple water detector circuit uses alternating voltage to prevent corrosion of the electrodes. It is easy to build and uses N1 as a trigger gate Schmitt that generate AC. If between the electrodes there is an electricity conductor, eg an aqueous solution, then due to the rectifying action of D1 and D2, the capacitor C4 is being charged.
When the capacitor voltage reaches the switching threshold of the Schmitt N2 trigger, the relay will trip and connect, for example a drain pump. The pump will be disconnected as soon as the electrodes do not touch the liquid. Geophysics is the science of characterising the subsoil without really needing to go into hiding to look at it. The field is based on the detection of physical properties, then using those characteristics to infer the underlying geological properties. Between the use of inversion mathematics and the wide range of physical properties of geological materials, it may look a bit like voodoo, even to other geoscientists. The most common way of using geophysics to detect groundwater is through the measurement of soil resistivity: dry soil will withstand the flow of electricity, while saturated sediments will conduct electricity more easily.
When the capacitor voltage reaches the switching threshold of the Schmitt N2 trigger, the relay will trip and connect, for example a drain pump. The pump will be disconnected as soon as the electrodes do not touch the liquid. Geophysics is the science of characterising the subsoil without really needing to go into hiding to look at it. The field is based on the detection of physical properties, then using those characteristics to infer the underlying geological properties. Between the use of inversion mathematics and the wide range of physical properties of geological materials, it may look a bit like voodoo, even to other geoscientists. The most common way of using geophysics to detect groundwater is through the measurement of soil resistivity: dry soil will withstand the flow of electricity, while saturated sediments will conduct electricity more easily.