Hydrostatic leveling systems (HLS) are used for long‐term measurements of vertical displacements and inclination of various objects. The temperature gradient caused by inhomogeneous and time‐variable environmental conditions can lead to a significant error. Experimental studies carried out in this paper demonstrated that the accuracy of the system can be improved through forced circulation of the fluid. Measurements should be performed in the restricted time interval after completion of the mixing, because the temperature of the sections of the hose gradually reverts to the original state. A detailed analysis of the temperature processes in the simplified analog of a long‐base HLS during mixing is carried out based on the results of numerical simulation. A model of the process of liquid mixing in the hydrostatic level is considered and verified. Heat transfer in the flowing liquid is described by the one‐dimensional equation, and the problem of heat conduction in a hose is solved in the axisymmetric formulation. The solution of the coupled heat transfer problem was carried out by the finite element method. The influence of the geometrical parameters of a long‐base hydrostatic level and pump flow rate on the mixing time and temperature heterogeneity of the liquid were investigated. The mixing procedure and sequence of actions discussed in this work can significantly reduce the error of the measuring system and provide an adequate selection of its parameters.

中文翻译：

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静压找平系统中的温度误差及其降低

静液压水平系统（HLS）用于长期测量各种物体的垂直位移和倾斜度。由不均匀且随时间变化的环境条件引起的温度梯度会导致明显的误差。本文进行的实验研究表明，通过强制循环流体可以提高系统的精度。混合完成后，应在限制的时间间隔内进行测量，因为软管各部分的温度逐渐恢复到原始状态。基于数值模拟的结果，对长基HLS简化模拟过程中的温度过程进行了详细分析。考虑并验证了在静液压水平下液体混合过程的模型。一维方程式描述了流动液体中的热传递，并通过轴对称公式解决了软管中的导热问题。耦合传热问题的解决是通过有限元方法进行的。研究了长基础静液压液位和泵流量的几何参数对液体混合时间和温度非均质性的影响。的混合过程和在这项工作中所讨论的动作序列可以显著降低测量系统的误差，并提供它的参数的适当选择。耦合传热问题的解决是通过有限元方法进行的。研究了长基础静液压液位和泵流量的几何参数对液体混合时间和温度非均质性的影响。的混合过程和在这项工作中所讨论的动作序列可以显著降低测量系统的误差，并提供它的参数的适当选择。耦合传热问题的解决是通过有限元方法进行的。研究了长基础静液压液位和泵流量的几何参数对液体混合时间和温度非均质性的影响。的混合过程和在这项工作中所讨论的动作序列可以显著降低测量系统的误差，并提供它的参数的适当选择。