Three-dimensional positioning method and positioning system for gas leakage position

Abstract

The three-dimensional positioning method for the gas leakage position comprises the following steps: establishing a sound field model based on a Kirchhoff diffraction far-field acoustical holography theory; acquiring leakage source sound field information on the measurement plane; processing the obtained sound field information to obtain acoustical holography data of the leakage source sound field; and determining the three-dimensional position information of the leakage source by using the sound field model and the acoustical holography data. According to the three-dimensional positioning method for the gas leakage position, more accurate sound field information can be obtained, and then depth information can be introduced to realize three-dimensional detection effect display of a leakage source; by constructing a far-field acoustical holography model based on the Kirchhoff diffraction theory, sound field positioning of a large-distance leakage source can be realized; and the virtual phased array technology is utilized, the system cost and complexity are reduced in gas leakage detection and positioning, the leakage source detection precision and positioning precision are improved, and the method has huge practical value and industrial application potential in the aspect of accurate positioning of the gas leakage position.

Description

technical field [0001] The application belongs to the technical field of gas detection, and in particular relates to a three-dimensional positioning method and a positioning system for a gas leakage position. Background technique [0002] The transportation and storage of gases are ubiquitous in people's industrial applications and everyday life. However, during the use of gas pipelines or storage equipment, leakage often occurs during the transportation or storage of compressed gas due to self or other human factors. In many industrial applications, these compressed gases are usually flammable, explosive or corrosive and toxic. Once a leakage accident occurs, it will often cause serious environmental pollution, huge waste of resources and major safety accidents. Being able to quickly and accurately locate gas leaks is critical to preventing gas transportation or storage accidents. [0003] At present, the one-dimensional detection method for gas leakage sources can detect...

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Problems solved by technology

For example, patent CN109813501A discloses a method, device and system for measuring the leakage position of a gas pipeline, which uses a small number of sensors to ensure the uniformity of data collection, improves the measurement accuracy, and improves the effectiveness of locating the leakage position of the gas pipeline; however Under normal circumstances, the environment in which gas leakage actually occurs is very complex. Due to the influence of external noise interference and the complex mechanism of the leakage acoustic signal's own reflected waves and stress waves propagating in pipelines or storage tools, the one-dimensional detectio...

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