摘要
针对水工物理模型表面流速测量方法的技术现状,提出了一种不对流场造成破坏的新型光电非接触式表面流速测量方法。对流速测量原理进行推导,并对影响测量精度的因素进行了分析。搭建了实验系统,在6种不同标定流速下,对0、25kg/m3及50kg/m3三种含沙量情况下的流速进行了测量。实验结果表明,在三种不同含沙量情况下,实测流速与标定流速的一致性较好,证明理论的可行性。实验还发现,水体适量含沙能提高流速测量精度,流速相对误差能控制在8%以下。
Aiming at the technology actuality of surface flow velocity measurement, a novel noncontact method for measuring surface flow velocity is proposed. Principle of flow measurement is deduced, and the factors that affect measurement accuracy are analyzed. Experimental system is set up. In the cases of three sediment concentrations, flow velocity is measured at 6 different flow rates. The experimental results show that under three different sediment concentrations, the measured flow velocity accords feasibility of the theory. It is found that the relative suitable sediment in liquid. very well with the calibration flow velocity, which proves the error can be controlled less than 8% under the circumstances of
出处
《光电工程》
CAS
CSCD
北大核心
2009年第12期68-72,102,共6页
Opto-Electronic Engineering
基金
重庆交通大学省部共建水利水运工程教育部重点实验室开放基金资助项目(SLK2007A01)
关键词
光电测量
表面流速
非接触
水工物理模型
optoelectronic measurement
surface flow velocity
noncontact
hydraulic physical model
