Online flow monitoring and calculating method, monitor and monitoring system

Abstract

The invention provides an online flow monitoring and calculating method, a monitor and a monitoring system. The method comprises the following steps of 1, conducting data preprocessing and DCL model parameter initialization, 2, selecting a sample dimension corresponding to the N H-ADCP cells, randomly dividing the initial population into five parts, and calculating each part corresponding to one model to obtain a model output value, taking the root-mean-square error of the output value and the measured value sample as an optimization fitness function, selecting the minimum value as an optimalindex set of the current iteration through fitness comparison, and recording an optimal feature dimension set and a parameter set, using the selected replacement global optimal fitness value for recording the corresponding optimal feature dimension, and a model and model parameters, if the requirements of precision and the maximum number of iterations are not met, gradually expanding the lower limit of feature dimension selection, and starting the next iterative computation, or otherwise, outputting the optimal model and corresponding model parameters, giving a final flow calculation value, and ending loop iteration, and 3, updating the parameters.

Description

technical field [0001] The invention belongs to the field of hydrological measurement, and in particular relates to a calculation method for on-line flow monitoring, a monitoring instrument and a monitoring system. [0002] technical background [0003] In recent years, with the promulgation of the most stringent water resources management system, the system of river and lake chiefs, and the implementation of national key projects such as hydrological monitoring projects for small and medium-sized rivers, and the improvement of hydrological modernization capabilities, the timeliness and accuracy of hydrological monitoring elements have been affected. put forward higher requirements. Among the many elements of hydrological monitoring, the most important and concerned is the monitoring of flow. The traditional flow monitoring mostly adopts the flow meter method, which not only has a large workload but also cannot achieve real-time monitoring. In recent years, with the develop...

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Problems solved by technology

[0006] (1) Calculation accuracy is not high: the current calculation methods are mostly based on mathematical statistics or the generalized curve formula of the vertical distribution of flow velocity as the core, but this method is only applicable to river sections with regular sections or relatively regular flow velocity distribution, and is applied under realistic conditions has great limitations, resulting in the calculation accuracy of this method is often not high

[0007] (2) Parameter selection problem: algorithms such as wavelet analysis and BP neural network cannot achieve the output of the optimal cell, and the calculation results often have large uncertainties, and cannot be adjusted with the increase of the number of samples or the change of the test section. Automatic adjustment of model parameters cannot be widely applied

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