Development and evaluation of automatic slip sensing device for Indoor Tyre Test CarriagePantnagar Journal of Research, Volume - 18, Issue - 2 ( May-August, 2020)
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The introduction of modified theoretical velocity (axle rpm) and actual velocity measurement devices made the measurement of wheel slip more precise. The design of the axle rpm and actual velocity measurement device was accurate and efficient. The proximity sensor sends pulses when the projections are at the closest distance to the sensor. Axle rpm and actual velocity are calculated using Matlab software. The smart monitoring and performing mathematical calculations in Catman and Matlab software make the data handling easier and online graphical display enables the observer with an insight into the relation of each and every parameter with one another. The final output of the experiment is obtained in an excel sheet directly. The performance of the developed device was compared with the manual method of measurement of wheel slip. For validation of the slip sensing device, the wheel slip was measured by both methods at normal loads 7.85 kN with 131 kPa, 8.83 kN and 96.6 kPa and 10.3 kN with 82.8 kPa tyre inflation pressures at varying pulls condition upto 20% slip. No significant difference in measuring wheel slip was found at 5% level of significance.
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