A tractor tyre was instrumented with six miniature pressure transducers, amplifiers and a unique wireless data communication system. The pressure sensors were located on the face of one lug and undertread region. The instrumented tyre (16.9R38) was run at a constant forward speed of 0.27 m/s and 23 % slip on a soft soil, 0.48 MPa cone index, 25.63 % d.b. moisture content with specific values of load and inflation pressure. The bench and field-test results showed that the wireless system enabled data to be transferred in real time over a distance of up to 100 m from the sensor. Increased levels of soil-tyre interface stress were found near the centre of the tyre 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-tyre interface pressure on the lug faces decreases while the pressure on the undertread increases.
Soil-tyre interaction monitoring on soft soil using an on-the-move wireless system
2007
6 Seiten, 3 Bilder, 10 Quellen
Aufsatz (Konferenz)
Englisch
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