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首页> 外文会议>The International Fertiliser Society at a meeting >PHOTOGRAPHIC IMAGING SYSTEMS TO MEASURE OF FERTILISER GRANULE VELOCITY DURING SPREADING
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PHOTOGRAPHIC IMAGING SYSTEMS TO MEASURE OF FERTILISER GRANULE VELOCITY DURING SPREADING

机译：摄影成像系统以测量散布过程中的肥料颗粒速度

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The aim of the research is to develop low cost high speed photographic imaging systems to measure outlet velocity of fertiliser granules during spreading. Two designs are presented in the paper. Although mechanically simple, centrifugal spreaders used for mineral fertilisation involve complex physics that cannot be fully characterised at the present time. Two parameters have to be controlled on each disc: the flow of fertiliser and the spatial distribution on the ground. Both sensors are developed to evaluate the spatial distribution of the fertiliser on the ground based on the measurement of initial flight conditions of fertiliser granules after their ejection by the spreading disc. ENESAD aims at developing a sensor for site specific fertilisation using centrifugal spreaders and a spreader prototype to replace the measurements done in test halls. CLO wants to develop a test device to evaluate spread patterns, at farm level and to replace the time consuming distribution measurements done with collector trays. The first techniques developed are based on the analysis of images of the area around the disc showing the granule ejection. High resolution -low cost imaging systems for the analysis of high speed particle projection developed for this specific purpose are presented in this paper.The ENESAD system is based on a camera and a sequence of flashes while the CLO system uses a photo camera and a LED-stroboscope. Both systems characterise the centrifugal spreading of fertiliser particles ejected at speeds of approximately 30 m/s. It automatically computes the direction of ejection and velocity of each granule observed in the image. Multi exposure images collected with the camera installed vertically above the output flow of granules are analysed to estimate the trajectories of the fertiliser granules, using different motion estimation methods.The results have been used in very simple ballistic model to predict the transverse spread pattern of fertiliser on the ground.
机译：该研究的目的是开发低成本的高速摄影成像系统，以测量施肥期间肥料颗粒的出口速度。本文提出了两种设计。虽然机械简单，用于矿物施肥的离心涂布器涉及在目前无法完全表征的复杂物理学。必须在每个光盘上控制两个参数：施肥的流动和地面的空间分布。基于散布盘后的肥料颗粒的初始飞行条件的测量，开发了两个传感器以评估肥料的空间分布。 ENESAD旨在使用离心吊具和吊具原型开发用于现场特异性施肥的传感器，以替代测试大厅所做的测量。 CLO希望开发一种测试设备来评估用于在农场等级的涂抹模式，并更换用集电极托盘完成的消耗分配测量。开发的第一技术基于对显示颗粒喷射的盘周围区域的图像的分析。本文介绍了用于分析用于该特定目的开发的高速粒子投影的高分辨率的成本成像系统。eNesad系统基于相机和一系列闪光，而CLO系统使用照片相机和LED -stroboscope。两种系统表征施肥颗粒的离心扩散，以约30米/秒的速度喷射。它自动计算在图像中观察到的每个颗粒的喷射和速度的方向。通过垂直安装在颗粒的输出流量上方的相机收集的多曝光图像以估计使用不同的运动估计方法来估计肥料颗粒的轨迹。结果已用于非常简单的弹道模型，以预测肥料的横向扩散模式在地上。

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