Tarbiat Modares University Journal of Agricultural Science and Technology 1680-7073 11 4 2009 10 01 An Extended Octagonal Ring Transducer for the Compression Chamber of a Large Square Baler حسگر سنجش نیرو با استفاده از رینگ هشت وجهی بسط یافته برای محفظه تراکم بیلر مکعبی بزرگ 377 389 14814 EN S. Afzalinia Department of Agricultural Engineering Research, Agricultural Research Center of Fars Province, Zarghan, P. O. Box: 73415-111, Shiraz, Islamic Republic of Iran. M. Roberg t Journal Article An extended octagonal ring (EOR) transducer was designed and developed to measure forces inside the compression chamber of a large square baler in different directions. The transducer was calibrated by applying forces in three directions simultaneously and independently. The sensor revealed excellent linearity along with small cross sensitivities. Horizontal and vertical primary sensitivities of the sensor were 1,479.7 and 1387.8 μVkN-1V-1, while horizontal and vertical cross sensitivities were 0.64 and 2.85% of the sensor primary sensitivities, respectively. The sensor was used to measure the forces inside the compression chamber of a large square baler in different directions. https://jast.modares.ac.ir/article_14814_173e2619a507a324eb10f969df13a372.pdf