Abstract
A low-cost data acquisition system for tillage tools was designed to measure draft, vertical force reaction,moment about the vertical axis, and depth and speed. The object was to investigate the field performance of light tillagetools intended for use with animal traction in Kenya, in a comparative and repeatable manner, and to enable the study ofsoil-tool interactions over a wide range of soil conditions. The system was designed to be easily transported, of lowmaintenance, and adaptable to tractors and other vehicles with a tow-bar. Main components of the system include adatalogger and portable computer, tensile load cell, chain driven tachogenerator and speedometer units for recording andmonitoring speed respectively, a linear potentiometer for sensing depth, and a two-component octagonal ring transducerfor measuring moment and vertical force reaction in the shank of the mounted tool. Draft loads of up to 10 kN, verticalforce reaction up to 3 kN, moment on the tool shank up to 0.4 kNm, speed up to 2.8 m/s, and tillage depth up to 300 mmmay be measured simultaneously.
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