Real-time dynamic prediction method for leakage process of hazardous medium based on UAV (Unmanned Aerial Vehicle) detection

A dangerous medium, real-time dynamic technology, applied in forecasting, special data processing applications, instruments, etc., can solve the problems of low prediction accuracy and timeliness of Gaussian plume model, and achieve high application value and high reliability Effect

Active Publication Date: 2018-06-05
NANJING BOILER & PRESSURE VESSEL SUPERVISION & INSPECTION INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In view of the shortcomings of the above-mentioned existing models, the purpose of the present invention is to provide a real-time dynamic detection method for dangerous medium leaka

Method used

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  • Real-time dynamic prediction method for leakage process of hazardous medium based on UAV (Unmanned Aerial Vehicle) detection
  • Real-time dynamic prediction method for leakage process of hazardous medium based on UAV (Unmanned Aerial Vehicle) detection
  • Real-time dynamic prediction method for leakage process of hazardous medium based on UAV (Unmanned Aerial Vehicle) detection

Examples

Experimental program
Comparison scheme
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Example Embodiment

[0037] Example 1

[0038] A dynamic simulation method of continuous leakage and diffusion, specifically as figure 1 As shown, including the following steps:

[0039] Step S10, inputting known parameters, and initializing related parameters according to the known parameters, the known parameters including dangerous medium category, wind speed, wind direction, weather conditions, leakage location, etc.;

[0040] According to the Gaussian plume model (continuous point source Gaussian model), the actual pollutant concentration at any point within the leakage range is shown in equation (1):

[0041]

[0042] According to this model, the leakage concentration at any point in the downwind direction can be obtained:

[0043] Among them, the ground concentration (z=0) is:

[0044]

[0045] The ground projection concentration of the downwind cloud plume centerline (y=z=0) is:

[0046]

[0047]

[0048] In formula (4), Q: leakage source strength, unit kg / s; C D : Leakage coefficient, dimensionless, ...

Example Embodiment

[0093] Example 2

[0094] In order to explain the present invention more clearly, this embodiment sets the initial parameters as:

[0095] Table 4 Initial parameters

[0096]

[0097] Under the same other conditions, if the leakage hole size is unknown at the time of the accident, take the radius of the leakage hole as 6mm, 9mm, and 12mm respectively, then 30mg / m 3 The comparison chart of the constant concentration curve is as image 3 As shown in the figure, the original model 1 in the figure is the isoconcentration curve when the leakage aperture is estimated to be 12mm, the original model 2 in the figure is the isoconcentration curve when the leakage aperture is estimated to be the actual size of 9mm, and the original model 3 in the figure is the leakage aperture estimation as Isoconcentration curve at 6mm. The X axis represents the diffusion distance of dangerous media downwind.

[0098] Using the same actual case, take any two points C 1 (60,12.809, 0), C 2 (80, 19.155), the co...

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Abstract

The invention relates to a real-time dynamic prediction method for a leakage process of a hazardous medium based on UAV (Unmanned Aerial Vehicle) detection, and belongs to the field of diffusion process of continuous leakage of the hazardous medium. After the hazardous medium is continuously leaked, a Gaussian model original algorithm is improved by using numerical computation methods such as a Taylor formula and a polynomial expansion method under the condition that the size of a leakage source is unknown, and further a novel prediction method which is based on UAV detection data and can dynamically display prediction results is obtained. By using the method, the leakage range of the hazardous medium can be predicted in real time according to the medium concentration of any two points inthe leaking range space and three-dimensional coordinate position data, which are detected by the UAV.

Description

Technical field: [0001] The invention belongs to the field of diffusion process prediction of continuous leakage of hazardous medium. Specifically, after continuous leakage of hazardous media, when the size of the leakage source is unknown, the original algorithm of the Gaussian model is improved by using numerical calculation methods such as Taylor's formula and polynomial expansion, and a real-time dynamic display based on UAV detection data is obtained. A new forecasting method for predicting outcomes. This method can predict the leakage range of dangerous media in real time according to the medium concentration and three-dimensional coordinate position data of any two points detected by the UAV in the leakage range space. Background technique: [0002] In industry, especially in the pressure-bearing special equipment industry, flammable, explosive and toxic and hazardous substances are prone to leakage accidents during production, storage and transportation. In order to...

Claims

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Application Information

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IPC IPC(8): G06Q10/04G06F17/50
CPCG06Q10/04G06F30/20
Inventor 业成姜君张伯君章彬斌刘维佳崔强文耀华
Owner NANJING BOILER & PRESSURE VESSEL SUPERVISION & INSPECTION INST
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