In order for the measurements to be comparable, a common zero point must be established.
To achieve this common zero point, Waatic will develop in the user interface and PCB firmware, a system to achieve this automatic zero with electronic control. This zero point will affect the sensitivity of the system. The zero point is an oil pressure value. The user or technician will determine the initial working pressure value (common to all subsolation tasks) The system acting on the oil inlet and outlet valves will allow oil to enter until the desired initial pressure is reached . From this moment the system will close the valves leaving a closed circuit. From this moment, the compression of the subsolador pistons will increase the pressure of this closed circuit. A greater ground resistance to the advance of the subsoiler will translate into greater compression and therefore a higher value of the closed circuit pressure. The geolocated record of these pressure variations will form a soil compaction map of the worked plots.
With this sensorization, we achieve the registration of the action. However, the project also aims to act on the subsoiler.
A sensor will be installed that, through the use of ultrasound, will measure the working height of the subsoiler. At the initial point and through the corresponding button on the tablet that will perform the user interface functions, the operator will determine the zero point in this case corresponding to the working depth.
The user will be able to determine the desired working depth by indicating the value in centimeters on the screen of the table that performs the user interface functions. This depth established on the screen will be transferred wirelessly to the electronic box located in the subsoiler which will send signals to the corresponding valves to actuate the pistons of the subsoiler roller until the desired working depth is achieved.
The system will monitor not only the pressure of each point of the plot, but also the working depth, since it is presumed that the system, faced with a high resistance, will be forced to rise from the ground. The registration of these data will allow the creation of models to know the edaphic characteristics of the farm.
