On-the-Move Monitoring of Soil-Tire Interaction on Soft Soil Using Wireless Data Acquisition

摘要

A tractor tire was instrumented with six miniature pressure transducers, amplifiers, and a unique wireless data communication system (EZ-Logger). The pressure sensors were located on the face of one lug and undertread region. The instrumented tire (16.9R38) was run at a constant forward speed of 0.27 m s -1 and 23% slip on a soft soil, 0.48 MPa cone index, 25.6% d.b. moisture content with specific values of load and inflation pressure. The bench and field test results showed that the wireless EZ-Logger enabled data to be transferred in real time over a distance of up to 100 m from the sensor. Increased levels of soil-tire interface stress were found near the center of the tire when inflation pressure was increased and near the edge when load was increased. The peak interface pressure results showed that the greatest ratio of peak interface pressure to inflation pressure was 2.59 and the lowest ratio was 0.47. The trend showed that the mean and peak pressures acting on the lug were approximately twice those on the undertread. Comparison of results from the field tests with the literature showed that as soil strength decreases, the soil-tire interface pressure on the lug faces decreases while the pressure on the undertread increases