طراحي ، ساخت و ارزيابي دينامومترالكترونيكي با استفاده از تكنولوژي مناسب

Design, Construction and Evaluation of Electronical Dynamometer by Appropriate Technology

Dynamometers are equipment for measuring force. In this study a drawbar dynamometer was designed, constructed and evaluated after calibration in the workshop. This dynamometer can be used for measuring of draught force in most of agricultural implements as well as drawbar pull in category l and II tractors. The mechanical parts of the dynamometer include main bodies, metallic parts of bodies, elastic element, spherical roller bearings and other attachments. Electronical parts include strain gauges, bridge circuit and microvoltmcter . The source of power supply can be provided from tractor battery. Results of tests showed that there was a linear relationships between compressive force exerted on the dynamometer and of the output voltage, and the correlation factor (r) was as higher as 0.99.