LAUSR

Abstract In this paper, an on-the-go soil mechanical resistance system was developed to evaluate the degree of the soil compaction. The system consists of tractor, subsoiling shovel, strain gauges, pressure sensor, signal conditioner, data acquisition card. A self-designed linear model, involving the different speed, different tilling depth, and soil moisture content, was designed to express the soil mechanical resistance. Different applied force was used for the system evaluation, the pressure sensor and three sets of strain gauges, were simultaneously measured in parallel. The relative errors are between 0.04%-12.17%, 0.53%-14.09%, 0.79%-10.75%, 0.40%-28.73%, respectively. The deviation within ± 5%. The research need further field testing and the software simulation to provide an accurately model for the soil mechanical resistance and the soil compactness.