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A two-dimensional water pollution diffusion source tracing positioning method and system based on a quasi-Newton method

A quasi-Newton method and positioning method technology, applied in the field of pollution source positioning, can solve problems such as limitations and instability, and achieve the effects of accurate identification, improved accuracy, and reduced system energy consumption

Active Publication Date: 2019-04-23
CHINA UNIV OF GEOSCIENCES (WUHAN)
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Problems solved by technology

[0003] The technical problem to be solved by the present invention is to provide a two-dimensional water pollution diffusion source tracing and positioning method and system based on the quasi-Newton method in view of the limitations and instability defects of the existing technology

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  • A two-dimensional water pollution diffusion source tracing positioning method and system based on a quasi-Newton method
  • A two-dimensional water pollution diffusion source tracing positioning method and system based on a quasi-Newton method
  • A two-dimensional water pollution diffusion source tracing positioning method and system based on a quasi-Newton method

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Embodiment Construction

[0041] In order to have a clearer understanding of the technical features, purposes and effects of the present invention, the specific implementation manners of the present invention will now be described in detail with reference to the accompanying drawings.

[0042] refer to figure 1 , which is a flowchart of a pollution source location method, specifically including the following steps:

[0043] L1. Deploy five DFRobot conductivity sensor nodes in a 6m×6m pool, and establish a reference coordinate system for the entire monitoring water area with the center of the pool as the origin, and obtain the position coordinates of each sensor node.

[0044] L2. Use sensors to measure the conductivity value of each monitoring point, wherein each sensor node is connected to the host computer by a USB splitter, and the host computer receives the conductivity value collected by each node, and passes the conductivity and concentration. The functional relationship converts the conductivit...

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Abstract

The invention discloses a two-dimensional water pollution diffusion source tracing positioning method and system based on a quasi-Newton method, and the method and the system have the beneficial effects that the precision can be effectively improved, and the position, release intensity and release time of a pollution source can be accurately identified when the quasi-Newton method is used for carrying out two-dimensional water pollution diffusion source tracing positioning. The method comprises the steps of firstly establishing a reference coordinate system for a to-be-detected water area, andcalibrating the position coordinates of all nodes; secondly, measuring the conductivity value of each monitoring point by using a conductivity sensor, converting the conductivity value into a concentration value according to a functional relationship between the conductivity and the concentration, and substituting the concentration value and the position coordinate at each node into an established difference value function; and finally obtaining an extreme point of the difference function under the unconstrained condition by using a quasi-Newton method, namely, obtaining the pollutant releasequality, the release time and the pollution source position.

Description

technical field [0001] The invention relates to the field of pollution source location, and more specifically, relates to a two-dimensional water pollution diffusion source tracing and location method and system based on the quasi-Newton method. Background technique [0002] Water pollution will seriously damage the ecological environment and directly affect the development of society and the improvement of economic level. The location and tracking of pollution sources has become a research hotspot in recent years. In the identification of river sudden pollution source items based on the correlation coefficient optimization method, the correlation coefficient optimization method is used to design a single point source identification algorithm, but when the concentration noise is large, the calculation result deviates greatly from the real value; the literature is based on PSO-DE In the study of algorithmic sudden water pollution traceability, the particle swarm algorithm and...

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Application Information

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IPC IPC(8): G06F17/18G01N27/02
CPCG01N27/02G06F17/18
Inventor 王勇王迎彬王剑桥王典洪陈振兴
Owner CHINA UNIV OF GEOSCIENCES (WUHAN)
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