Characterization of shape and state of agglomeration of disperse systems by a 3D Light Scattering Sensor

在集群项目（MPaC）的过程中，目前正在凯撒大帝大学开发用于气溶胶的三维光散射传感器（3D-LSS）。最近的研究集中在500-1500 nm的颗粒尺寸范围。通过测量通过激光束的单个颗粒的三维光散射分布，不仅可以获得关于颗粒的尺寸的信息，而且可以获得关于颗粒的结构的信息。因此，颗粒穿过球形测量室。在该室的内壁上，可以在多达16个不同位置处确定散射强度。通过使用合适的数据处理算法，可以几乎在线地获得关于颗粒尺寸和形状的信息。在继续项目期间，将实现三个主要目标。一个重点将被设置在3D-LSS传感器的进一步发展，用于表征不规则形状的，现实的粒子系统。首先，3D-LSS传感器与MPaC集群内部开发的传感器系统相结合的可能性将在工业合作伙伴的工厂中进行研究。此外，开发的传感器系统将由工业和项目合作伙伴针对移动的应用进行修改。将测试完整系统在此类应用中的稳健性。此外，必须对作为传感器系统的一部分的空气动力学聚焦的开放射流内的颗粒运动进行理论和实验分析。借助于粒子运动和所得到的光散射强度之间的相关性，可以获得导致复杂粒子结构的三维检测的知识，所述复杂粒子结构例如烟灰、热解二氧化硅或其他凝华粒子。在项目结束时，工业合作伙伴将进行测量，并将结果与项目合作伙伴的测量结果进行比较。

In the course of a cluster project (MPaC) a 3D Light Scattering Sensor (3D-LSS) for aerosols is currently developed at University of Kaiserslautern. Recent investigations are focused on particles with a size range of 500-1500 nm. By measuring the three dimensional light scattering distribution of a single particle, which passes a laser beam, information not only about the size, but also about the structure of the particle can be obtained. Therefore, the particle traverses a spherical measurement chamber. On the inside wall of this chamber, scattering intensities can be determined at up to 16 different positions. By using suitable algorithms for data processing, it is possible to gain information about the particle size and shape almost online.During the continuation project, three major goals are to be attained. One focus will be set on the further development of the 3D-LSS sensor for characterization of irregularly shaped, realistic particle systems. First, possibilities for combination of the 3D-LSS sensor with sensor systems developed inside the MPaC cluster will be examined regarding the future applications at the plants of industrial partners. Furthermore, the developed sensor system will be modified for the mobile application by industrial and project partners. The robustness of the complete system for such kind of applications will be tested. Moreover, the theoretical and experimental analysis of the particle motion inside the open jet of the aerodynamic focusing, which is part of the sensor system, has to be performed. With the help of correlations between particle motion and the resulting light scattering intensities, knowledge can be gained that leads to a three dimensional detection of complex particle structures, such as soot, pyrogenic silicon dioxide or other desublimated particles. At the end of the project, measurements will be carried out by the industrial partners and results will be compared with measurements of the project partners.