Laboratory measurements of material feed rate through a rotary mowing machine. / Laboratorni mereni pruchodnosti materialu rotacnim zacim strojem.
- Authors
- Publication Date
- Jan 01, 2004
- Source
- OpenGrey Repository
- Keywords
- Language
- Czech
- License
- Unknown
Abstract
An overview of different methods developed and tested for material feed rate measurement during the work of harvesting machines is done. Many systems are known and just commercially used for grain flow measurement during the grain harvest by combine harvesters. The errors and their sources during the work of these systems described by many authors are discussed. The yield measurement methods are under developing for other harvesting machines, e.g. forage harvesters, mowing machines, potato, sugar beet, cotton and tomato harvesters etc. The function principles of systems based on weighing trailers or round balers are described as well. Two methods of the mowing machine material feed rate measurement were developed and tested. The measurements carried out proved that a very good linear relationship existed between the conditioner's power input, output frequency of the apparatus measuring impact force by means of the impact plate, and material feed rate through the mowing machine. The calculated R-Squared values were about 0,95. The impact of materials and conditions changes on mowing machine material feed rate measurement accuracy was measured under laboratory conditions as well. It was evident from statistical evaluation that changing crop variety, crop maturity and intensity of conditioning can have statistically significant influence on the measurement based on torque-meter. For impact plate measurement it was find out that it is not possible to determine statistically the influence of testing factors from our measurements. / Available from STL Prague, CZ / NTK - National Technical Library / SIGLE / CZ / Czech Republic
