Control method for secondary positioning in river model test

Abstract

The invention discloses a control method for secondary positioning in a river model test and relates to the field of river model manufacturing. The control method comprises the specific steps that (1)two positions in a first-time river model are selected as benchmark positions, and a benchmark point is determined on each benchmark position; (2) the corresponding two benchmark positions and benchmark points are found on a secondary model drawing; (3) the distances between secondary manufacturing characteristic points and each benchmark point are measured in the secondary model drawing, and then the positions of the secondary manufacturing characteristic points are determined in the first-time river model with the two benchmark points as the base points according to the measured values in the secondary model drawing; and (4) the river model is modified and manufactured according to secondarily-drawn characteristic points. According to the method, the landform characteristic points of the original first-time river model are used as the base points for secondary positioning, so that positioning points for secondary manufacturing are precisely and rapidly found, conciseness and convenience are achieved, positioning is rapid, and positioning precision is further guaranteed.

Description

technical field [0001] The invention relates to the field of river engineering model making, in particular to a secondary positioning control method in river engineering model tests. Background technique [0002] The primary river construction model produced for the first time is generally completed by using the section plate method. The channel anchor points on the primary river construction model are almost completely covered by the river channel model after the model is completed, and cannot be used in the secondary model production. [0003] At present, in the process of river engineering model test research, it is often necessary to study some water flow elements of the river channel and hydraulic structures under a certain river channel topography and landform state, and then make local adjustments (remediation) to the model channel on this basis. , and then compare and analyze the corresponding elements. In this process, the model needs to be re-made, which causes the...

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Problems solved by technology

[0002] The primary river construction model produced for the first time is generally completed by the section plate method. The channel anchor points on the primary river construction model are almost completely covered by the river channel model after the model is completed, and cannot be used in the secondary model production.

[0003] At present, in the process of river engineering model test research, it is often necessary to study some water flow elements of the river channel and hydraulic structures under a certain river channel topography and landform state, and then make local adjustments (remediation) to the model channel on this basis. , and then compare and analyze the corresponding elements. In this process, the model needs to be re-made, which causes the problem of secondary positioning measurement and control in the model production. In the past, the secondary positioning was performed based on the reference points left by the first production of the model. If the reference point left for the first time cannot be found or has been displaced, it cannot be guaranteed that the model river topography will be consistent with the design after the second production, and other methods are also difficult to guarantee accuracy and are time-consuming and cumbersome

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