Development of an Integrated Measurement System of Water Bodies by Means of Infrared PIV

A.PTV在天然水体中应用技术的发展(1)开发了一种有效的PTV示踪剂颗粒检测技术，可以检测河流、湖泊等自然水体表面的PTV示踪剂颗粒。通过彩色图像的判别分析和持续时间分析相结合的方法来分离示踪剂，消除了在2秒内消失的示踪剂颗粒图像。(2)将该技术应用于Yodo河表面流场的测量等，并用船载ADCP(声学多普勒水流剖面仪)测量了流场。(3)开发了一种风浪作用下同时测量波浪和水流的技术。(4)平行测量了Yodo河化学成分的季节变化，特别是氮和磷的季节变化。B.气球和/或风筝系绳携带的空气采样器的研制(1)安装在气球系绳上的空气采样器。多个采样器可以连接到系绳上，以采集不同高度的空气样本。(2)在微风条件下，对采样器进行了测试。正如预期的那样，探测到了一个沙尘穹顶，沙尘浓度在离地面约50m处最大，地面和100m处浓度较小。安装在气球上的摄像头也显示了尘埃穹顶的情况。相关研究贡献在该项目的资金支持下，引进了一台红外摄像机。该摄像机被应用于其他与红外图像分析相关的研究，取得了以下贡献：(1)应用红外摄像机减少夜间道路拐角和交叉口的交通事故。(2)应用于各种人体周围温度环境的研究项目。

A.Development of Application Technologies of PTV to Natural Water Bodies(1)An efficient technology was developed to detect tracer particles for PTV on surfaces of natural water bodies, such as rivers, lakes, etc. The tracers can be separated by a combination of discriminant analysis of color images and duration analysis, which removes candidates of tracer particle images disappearing within two seconds.(2)The technology was applied to measurement of the surface flow field of Yodo river, etc. The flow field was also measured with ADCP (Acoustic Doppler Current Profiler) carried by a boat. The results nicely agreed with each other.(3)A technique for simultaneous measurement of wave and flow under wind waves was developed.(4)In parallel, seasonal variations of chemical components in Yodo river were measured, especially on Nitrogen and Phosphor.B.Development of Air Samplers Carried along a Tether of a Balloon and/or a Kite(1)Air samplers attached to a tether of a balloon was developed. Several samplers can be attached to a tether to collect air samples at various heights.(2)In a weak-wind condition, the samplers were tested. A dust dome was detected as expected, which showed the maximum concentration of dusts at about 50m from the ground, and less concentration at the ground and at 100m. The dust dome was also visualized by a camera mounted on the balloon.C.Relevant Research ContributionsAn infrared video camera was introduced by the financial support of this project. The camera was applied to other researches relating to infrared image analyses, resulting in the following contributions :(1)Application of infrared video cameras to reduce traffic accidents at the corners and intersections of roads in night.(2)Applications to various research projects on temperature environment around human bodies.