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近年来随着缆道技术的发展,拉偏悬杆缆道在宽浅河流已急剧增加。由于测深测速范围的扩大,悬杆的长度和直径均在增加,导致水流扰动的加剧,增加了测速误差。ISO3455(国际标准)规定:流速仪检定时的悬杆悬吊方式,通常应和野外使用方式一致。这是较难做到的。但从研究悬杆流场对测速影响的分析入手,并改进悬杆结构,使误差减小到允许的范围,确是可能的。本文试就理论分析与水槽试验资料,论证二者之间的关系,并提出处理方法。供参考。
In recent years, with the development of the cableway technology, the tensioned cableway has been drastically increased in shallow rivers. Due to the extension of the sounding velocity range, the length and diameter of the suspended rods are increasing, which leads to the aggravation of water disturbance and the increase of the speed error. ISO3455 (International Standard) Provisions: When the flowmeter test suspension rod suspension, and the field should normally be used in the same manner. This is harder to do. However, it is indeed possible to start with the analysis of the influence of the velocity of the suspension rod on the velocity and to improve the structure of the suspension rod so as to reduce the error to the allowable range. This paper tries to analyze the theoretical analysis and the sink test data to demonstrate the relationship between the two and put forward the handling method. for reference.