Self-correcting Method for Application Rate Control Parameters of Wheat Seed Drill Machine

DING Yongqian, CHEN Chong, YU Hongfeng, ZHANG Hongda, DOU Xianglin, LIU Zhuo

Abstract

An application rate detection method was proposed based on a special dynamic weighing system where the nitrogen springs through pressure sensors provided the total supporting force and gave rise to the pulling force change of the S-type weighing sensors with the weight change of the material (wheat seed) inside the box. The unique measurement characteristics of the detection system was that the linear combination of the weighted sum of the two types of sensors and the actual application rate equation can filter the original signal of the sensors. The application rate detection method was found based on the measurement characteristics and applied to the application rate control of a seed drill machine with fluted rollers, with the control parameters self-corrected, which made the seed drill machine with fluted rollers realized the substantial closed-loop control of the application rate and ensured continuously high control accuracy. Using the seed drill machine with 6 of 24 fluted rollers were blocked, two types of tests for controlling the application rate, with and without the application of self-correcting control parameters, were carried out. During all the tests, the maximum, average and standard deviation of the absolute relative error between the measured value and the actual value were 4.52%, 2.68% and 1.14%, respectively. While the corresponding statistic data between the actual value and the target value were 18.38%, 17.06% and 1.21%, respectively without control parameters being self-corrected. And the corresponding data were improved to 3.70%, 2.61% and 0.67% after introducing the control parameter self-correcting. The test results showed that the application rate measurement method can effectively measure the application rate of the seed drill machine and can be applied to self-correcting control parameters and holding high control accuracy.


Keywords: wheat seed drill machine, application rate detecting, self-correcting, weighted signal  filtering

 

Download Full Text:

PDF


References


XIU Y F, LIN II B, WANG R X, et al. The development of a wheat variable precision seeding robot based on GPS [ J ]. Intelligent Automation and Soft Computing, 2010, 16(6) ; 869 -879.

SI II P, SUN L, CHEN J, et al. Summary of the developing status of greenhouse tray seeder and seed metering device[C] // International Conference on Applied Mechanics, Materials and Mec hanical Engineering,2013 ; 217 -219.

DING Y Q, YANG L, ZHANG D X, et al. Novel low-cost control system for large high-speed corn precision planters [ J ]. International Journal of Agricultural and Biological Engineering, 2021 , 14(2) ; 151 - 158.

GRIFT T E, WALKER J T, HOFSTEE J W. Mass flow measurement of granular materials in aerial application—Part 2; experimental model validation[ J ]. Transactions of the ASAE, 2001 , 44( 1 ) ; 27 -34.

SWISHER D W, BORGEIT S C, SUDDUTH К A. Optical sensor for granular fertilizer flow rate measurement [J]. Transactions of the ASAE, 2002, 45(4) : 881 -888.

QIU Guizhi, GE Ruihuan, JIANG Yu, et al. Microwave doppler measurement of solid particles in circulating fluidized bed return system [J ]. Journal of Engineering Thermophysics, 2014, 35(8) : 1569 - 1574. (in Chinese)

BACK S W , YU S H, KIM Y J, et al. An image-based application rate measurement system for a granular fertilizer applicator [J]. Transactions of the ASA BE, 2014 , 57 (2) : 679 - 687.

GONZALEZ-MONTELLANO C, BAGUENA E M, RAMLREZ-GOMEZ A, et al. Discrete element analysis for the assessment of the accuracy of load cell-based dynamic weighing systems in grape harvesters under different ground conditions [J ]. Computers and Electronics in Agriculture, 2014, 100; 13-23.

FENG Ningning, LIU Gang, ZHANG Yan'e, et al. Dynamic weighing algorithm of dairy cow based on EMD [J]. Transactions of the Chinese Society for Agricultural Machinery, 2019 ,50( Supp. ) ; 305 -312. (in Chinese)

ZHANG Anqi, MENG Zhijun, CHEN Liping, et al. Signal analysis and processing of dynamic weighing system for small square baler[ J ]. Transactions of the Chinese Society for Agricultural Machinery, 2020,5 1 ( Supp. 2 ) ;243 - 248, 260. (in Chinese)


Refbacks

  • There are currently no refbacks.