Method for correcting sound velocity parameters of depth sounder by using hammer ball

Abstract

The invention relates to a method for correcting sound velocity parameters of a depth sounder by using a hammer ball. The method comprises the following steps of: (1) water depth measurement: after ameasuring point is selected, dropping a hammer ball with a measuring line to the bottom of a river, reading water surface measuring line scales, and adding the diameter of the hammer ball to obtain actually measured water depth; and (2) parameter correction: completely submerging the probe of a depth sounder into the water surface, measuring real-time readings, and debugging the sound velocity parameters of the depth sounder until the value of the point measured by the depth sounder is equal to the actually measured water depth, so that the actual sound velocity is obtained through back-stepping. The method has the advantages that on-site construction conditions are fully utilized, actual sound velocity in water of the depth sounder can be rapidly measured without material investment, construction cost is remarkably reduced, the accuracy of actually measured water depth is guaranteed in the cofferdam, the selected water area has representativeness, water quality and the surface of a riverbed can represent an actual water area to be measured, sound velocity measurement is scientific and effective, the cofferdam is internally provided with the transverse supports and the enclosing purlins, a good experiment platform is provided, and operation is easy.

Description

technical field [0001] The invention relates to a method for correcting sound velocity parameters of a depth sounder by using a hammer ball, and belongs to the technical field of construction measurement. Background technique [0002] The more common dual-frequency echo sounder on the market, combined with the use of RTK, is suitable for underwater terrain survey of large rivers. In the actual application of the depth sounder, the sound velocity is an important measurement parameter. Since the sound velocity in waters of different media is different, blindly adopting the default sound velocity parameter will lead to a certain measurement deviation, which will affect the construction, and the deeper the water depth, the greater the deviation. Due to the high cost of equipment for professional measurement of sound velocity, the measurement team urgently needs to use existing conditions to solve the problem of sound velocity measurement. Contents of the invention [0003] Th...

AI Technical Summary

Problems solved by technology

In the actual application of the depth sounder, the sound velocity is an important measurement parameter. Since the sound velocity in waters of different media is different, blindly adopting the default sound velocity parameter will lead to a certain measurement deviation, which will affect the construction, and the deeper the water depth, the greater the deviation

Due to the high cost of equipment for professional determination of sound velocity, the measurement team urgently needs to use existing conditions to solve the problem of sound velocity measurement

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