DEVELOPMENT OF MEASUREMNT SYSTEM FOR THE POLLUTION OF WATER QUALITY IN WIDE AREAS OF HYDROSPHERE BY LIGHT WAVE

光波大面积水圈水质污染测量系统的研制

• 批准号: 63550457
• 负责人: YOSHIDA Yutaka
• 金额: $ 1.47万
• 依托单位: MURORAN INSTITUTE OF TECHNOLOGY
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for General Scientific Research (C)
• 财政年份: 1988
• 资助国家: 日本
• 起止时间: 1988 至 1989
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-63550457/
• 关键词: Pollution of water quality; Particles suspended in liquid; Weight concentration; Particle's number; Size distribution; Characteristics of attenuation of laser; Laser propagation loss; Continuous measurement; 粒径分布; レーザ光減衰特性

A procedure and apparatus have been developed to determine the concentration and size distribution of particles suspended in a liquid of wide areas for river and sea etc.1.The measurement of concentration and calculation for size distribution by using several lasers. We measured the attenuation of several lasers that use wave length of 0.6328, 1.15,3.39 and 10.6.mum, for suspended particles in liquid. As a result,it has been confirmed that this method was able to measure for the concentration and size distribution of suspended particles in liquid by utilizing the light wave attenuation theory.2.Based on the light wave attenuation theory, an in-situ measurement system was designed. In-situ measurement experiments were performed to measure alpha-W(laser propagation loss and weight concentration) characteristics of attenuation by laser in water of river and pipe. As a result, we have been confirmed to become possible to assess the alpha-W characteristics of suspended particles, which is most important procedure to get the exact value of coefficient of proportion k(=W/alpha). It is needless to say that method obtained in the present study can be applied for suspended particles in liquid.

本文介绍了一种测定河流、海洋等大面积液体中悬浮颗粒浓度和粒径分布的方法和装置。1.用多台激光器测量浓度和计算粒径分布。我们测量了波长为0.6328、1.15、3.39和10.6 μ m的几种激光对液体中悬浮颗粒的衰减。实验结果表明，该方法能够利用光波衰减理论测量液体中悬浮颗粒的浓度和粒径分布。2.基于光波衰减理论，设计了一套现场测量系统。对激光在河水和管道水中的衰减特性进行了现场测量。因此，我们已被证实，成为可能的评估的α-W特性的悬浮颗粒，这是最重要的程序，以获得准确的比例系数k（=W/α）。不用说，本研究所获得的方法可以应用于液体中的悬浮颗粒。