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Title:   Author  item
                                            ROSA, U - UNIV OF CALIFORNIA DAVISitem
                                            UPADHYAYA, S - UNIV OF CALIFORNIA DAVISitem
                                            JOSIAH, M - UNIV OF CALIFORNIA DAVISitem
                                            KOLLER, M - UNIV OF CALIFORNIA DAVISitem
                                            MATTSON, M - UNIV OF CALIFORNIA DAVISitem
                                            Pelletier, Mathew
  Submitted to: ASAE Annual International Meeting
                                    Publication Type: Peer Reviewed Journal
                                    Publication Acceptance Date: 8/15/1999
                                    Publication  Date: 2/5/2000
                                    Citation: Rosa, U.A., Upadhyaya, S.K., Josiah, M., Koller, M., Mattson, M., Pelletier, M.G. Analysis of a tomato yield monitor. Transactions of the ASAE. 2000. v. 43(6). p. 1331-1339.Interpretive Summary: This study develops a mathematical model for representing the response of a continuous weighing system to a moving mechanical load, provides experimental verification to the model, and provides a detailed simulation study that determines the optimum design parameters of a mass flow type yield monitor to achieve the desired accuracy, frequency response, and  spatial resolution.
                                Technical Abstract: A continuous mass flow type tomato yield monitor was analyzed to determine its frequency response characteristics and to get some insight into the design requirements. A continuous beam theory was employed to model a taut conveyor. The impulse response of this device was evaluated and verified experimentally. The analysis clearly showed the effect of misalignment of  idler rollers with respect to the weigh roller on the load cell readings and a method of overcoming this problem. Moreover, it also showed the effect on weigh span length in relation to the adjacent span lengths on the accuracy of the system. The model identified design parameters critical to the development of a continuous mass flow type yield monitor that has desired frequency response and spatial resolution.


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