Research On Detection Of Power Consumption Of Boat-rotary Tillage And Stubble-mulch Machine Based On LabVIEW

The multiple rice-cropping systems had existed in southern China for a long time. Such systems include rape-rape-rice rotation, wheat-rice rotation, two-harvest rice and green manure-rice etc. A practical problem is the high stubble-mulch can be hardly overturned by human and animal labor or conventional tillage machines. Boat-rotary tillage and stubble-mulch machine, developed by Huazhong Agricultural University, is very suitable to solve this problem, which could complete prostrate straw, rotary tillage, stubble-mulch, level paddy field simultaneously, and could achieve protective mechanized cultivation. The boat-rotary tillage and stubble-mulch machine had been sold more than 630 sets since this machine began popularization in 2007, and created a very good social, economic and ecological benefit, more than 38 thousand farmers in 34 countries of 6 provinces had benefited for this machine. The left and right spiral roller blade is the main power consume component of the machine. At present, according to the power equip of the new roller, usually adopted qualitative method of experiment and analogy method. So its quantitative power consumption research is very significant.This paper based on virtual instrument and phase-difference torque measuring technology, adopted LabVIEW software for data analysis, the main results and conclusions as follows:(1) Established a power, torque testing system based on virtual instrument. This paper had analyzed the test needs of boat-rotary tillage and stubble-mulch machine working in paddy fields, adopted phase-difference detection method, which had non-contact, adaptable, flexibility features, and was very suitable for testing power consumption of the boat-rotary tillage and stubble-mulch machine. The software had been developed on the LabVIEW platform.(2) Calibrated the testing system on engine test bench. Using the correlation method, FFT method and zero-crossing method of data processing methods to compile program, then the system has been calibrated on the engine test bench. The results showed that:the system based on the correlation method had the best accuracy, stability, and linearity, it's accuracy was lower than 4.5%, and the other two methods were greater than 5%.(3) Operated real-time detection of power consumption to boat-rotary tillage and stubble-mulch machine in winter fallow field, rape field and mid-season rice field. And found the best model for paddy field operations:tillage for twice, of which the first tillage depth 55mm, the second tillage depth 110mm, roller blade speed of 310r/min, and the forward speed is 1.7m/s, its power consumption is less than 9kW, so the existing 13kW power can meet the operational requirements. (4) The calibration and field test had showed that, the power, torque testing system based on virtual instrument and phase-difference technology can be widely used in agricultural and industrial machinery's real-time power detection.