MICROPROCESSOR BASED WHEEL SLIP MEASURING SYSTEM
DOI:
https://doi.org/10.52151/Abstract
The paper essentially deals with the development. fabrication and evaluation of a low-cost microprocessor-based tractor wheel slip sensing device using photo-electric transducer and measures slip with respect to front wheel revolutions. The photo-transducer picks up the slip signals that are converted to square pulses through Schmill Trigger (7414). The input/output chip 8255 and the microprocessor processes the signals as per the programme loaded in EPROM and the processed result is received in the RAM for storage and display in the 7-segmcnt LED through input/output chip 8255 and BCD to 7 segment decoder/driver 7447. The system is simple and cheap compared to microprocessor kit or micro-computer-based system (Grevis-James et. al., 1980 and. I hompkins et. al., 1988). The overall electronic· circuit together with the constant power supply was tested in laboratory as well as in field/ploughed at 9-10% moisture content using M.B.plough, disc plough, cultivator and seed drill at five different speeds (1.0- 5.5 km/h) and four different rear wheel inflation pressure (l.l25 - 1.547 kg/cm2). Analysis of the data indicates close agreement between the transduced and normal slip values with co- relation co-efficient ranging between 0.87-0.99 and statistically significant at 1% level in most of the cases. The relative error was found to lie between 0.85- 14.01%. The system has been found to be adequate for operator's use to control slip during operation within the optimum range of 7-14% (Gee-Clough, 1980).
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References
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