光学学报, 2020, 40 (7): 0712001, 网络出版: 2020-04-15   

跨微米尺度混合颗粒粒径的同步测量方法 下载: 848次

Synchronous Measurement Method of Trans-Micron Scale Mixed Particle Size
作者单位
1 上海理工大学上海市动力工程多相流动与传热重点实验室, 上海 200093
2 上海航天动力技术研究所发动机技术发展研究室, 上海 201109
摘要
基于多波长消光法和图像法颗粒测量原理,提出了跨微米尺度混合颗粒粒径同步测量方法,建立了亚微米-十微米尺度颗粒粒径消光光谱反演算法及十微米以上尺度颗粒粒径图像处理算法;采用分光棱镜,搭建了消光光谱与背光图像同步测量装置,利用500 nm~76.9 μm粒径范围内的10种标准颗粒配成跨微米尺度混合颗粒样品并开展实验研究。结果表明:利用所提方法开展跨微米尺度混合颗粒粒径同步测量时,亚微米-十微米尺度颗粒消光光谱与十微米以上尺度颗粒背光图像的相互影响可忽略,可同步测量得到跨微米尺度混合颗粒粒径;利用消光法和图像法分别开展亚微米-十微米、十微米以上尺度颗粒粒径测量,与标准颗粒粒径相比,相对误差均小于8%,且测量重复性较好,这为跨微米尺度混合颗粒提供了一种有效的粒径测量手段。
Abstract
Based on the principles of particle size measurement by multi-wavelength light extinction and image methods, a method for synchronous measurement of trans-micron scale mixed particle size is proposed, and the extinction spectral inversion algorithm for submicron-ten microns particle size and the image processing algorithm handling particle size over ten microns are established. The device for synchronously measuring extinction spectra and backlight images is established with a dispersion prism. The experiment with the trans-micron scale mixed particle samples prepared by ten kinds of standard particles with the sizes of 500 nm-76.9 μm is conducted. The results show that when the method is used to synchronously measure the trans-micron scale mixed particle size, the interaction between the extinction spectrum of submicron-ten microns scale particles and the backlight image of particles over ten microns can be ignored, and the trans-micron scale mixed particle size can be measured synchronously. The extinction method and the image method are respectively used to measure submicron-ten microns particle size and particle size over ten microns, the relative errors are less than 8% compared with those with the standard particle size, and the measurement repeatability is good, which provides an effective particle size measurement method for trans-micron scale mixed particles.

赵蓉, 潘科玮, 杨斌, 平力, 蔡小舒. 跨微米尺度混合颗粒粒径的同步测量方法[J]. 光学学报, 2020, 40(7): 0712001. Rong Zhao, Kewei Pan, Bin Yang, Li Ping, Xiaoshu Cai. Synchronous Measurement Method of Trans-Micron Scale Mixed Particle Size[J]. Acta Optica Sinica, 2020, 40(7): 0712001.

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