Design and Experiment of Farmland Surface Micro-landform Measuring Device after Rapeseed Planter Seeding

ZHANG Qingsong, QI Tao, LIAO Qingxi, WANG Zetian, CHEN Jie, ZHU Longtu

Abstract

Aiming at the problems that the characteristic parameters' measurement of the micro-landform shape of the working surface is difficult, the measuring efficiency and error by the traditional measurement method are difficult to balance, and the operation convenience of the existing measurement device is not enough after the operation of the rapeseed combined direct seeder, and a self-propelled remote control farmland surface micro-geomorphology measuring device was designed. The device was mainly composed of a moving unit and a micro-geomorphology measurement system. The device can reach the designated measurement area by remote control operation, control the laser radar to scan height and speed by the mobile phone APP, and display the measurement status information in real time to realize the efficient measurement of the shape characteristics of the farmland surface micro-geomorphology. The driving force of the suspension vibration avoidance mechanism and the driving mechanism of the moving unit of the device was designed and analyzed, and the parameters of the cylindrical spiral compression spring and the driving motor of the moving unit were determined. The hardware and software of the control unit of the micro-landform measurement system were designed, and the hardware circuit and software workflow of the control unit were determined. The tilt error and system error of the device were analyzed, and the correction method of eliminating tilt error and system error was determined. The field measurement test of the device was carried out to measure the micro-geomorphologic characteristics of the surface and the furrow type. The results showed that the developed farmland surface micro-geomorphologic measuring device measured the surface micro-geomorphologic shape characteristics after the operation of the rapeseed combined direct seeder and the rape micro-ridge direct seeding machine. The root mean square height, surface correlation length, average furrow width, furrow width stability coefficient, average furrow depth and furrow depth stability coefficient were 4.01%, 4.81%, 3.70%, 1.34%, 2.09% and 2.89%, respectively.


Keywords: rapeseed planter, surface micro-topography, measuring device, self-propelled remote control, LiDAR

 

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