Application of UAV laser methane inspection scheme in chemical park safety management
In the production process of large industrial enterprises in chemical parks and petroleum refineries, industrial equipment may be worn during use, especially pipes, valves and other parts, cracks, loosening and other problems, resulting in methane leakage; During operation, workers may leak methane due to negligence, improper operation and other reasons; Improper maintenance of equipment, such as failure to regularly inspect and replace damaged parts; Pipes can be corroded during prolonged use, especially if they carry corrosive substances, which can lead to a reduction in pipe wall thickness, which can trigger methane leaks.
Enterprises should strengthen equipment maintenance and management, regularly check and replace aging equipment components, improve the skills and awareness of operators, and ensure that the process is reasonable to reduce the risk of methane leakage.
# Laser methane inspection solution #
The UAV laser methane telemeter can detect trace methane gas in the air from a distance without contact, quickly find potential leakage points, and effectively avoid fire, explosion and other safety accidents caused by leakage.
Using TDLAS principle of tunable semiconductor laser absorption spectroscopy, tunable semiconductor laser can emit laser with variable wavelength. These lasers are characterized by a very narrow line width, and their wavelength can be adjusted by changing the injection current. By adjusting the injection current of the laser, the wavelength of the laser can be scanned over a specific range that includes the absorption peaks of the molecules of the gas being measured, such as methane. When the wavelength of the laser sweeps past the absorption peak of the methane molecule, the methane molecule absorbs the energy in the laser. The ability of each gas molecule to absorb a particular wavelength of light is determined by its molecular structure and energy level. According to the Bier-Lambert law, the absorption of light by gas molecules is proportional to the concentration of gas molecules. Therefore, by measuring the degree to which the laser light is absorbed, the concentration of methane gas can be deduced. Laser methane telemeters determine the presence and concentration of methane by analyzing absorption in a gas sample. Because methane molecules selectively absorb specific wavelengths of laser light, the concentration of methane gas can be accurately determined by precisely measuring the degree of laser absorption.