Petroleum and natural gas leakage detection method based on double-optical frequency comb spectrum technology

Abstract

The invention discloses a petroleum and natural gas leakage detection method based on a double-optical frequency comb spectrum technology. According to the method, two optical frequency combs with small repetition frequency difference are used for converting to radio frequency detection under multi-heterodyne interference, and then are combined with a Fourier transform spectrum technology so as torealize noncontact online detection of petroleum and natural; the method comprises the following steps: (1) completing locking of repetition frequencies and carrier envelope phase deviation frequencies of two optical frequency combs; (2) detecting natural gas leakage; (3) the two optical frequency combs carry out multi-heterodyne interference radio frequency detection; (4) carrying out Fourier transform through a computer to restore spectral information; and (5) judging whether the natural gas detection area leaks or not. The method has the advantages that the spectral resolution and the signal-to-noise ratio of the method are higher, various gas components can be discriminated at the same time, and the anti-interference capability is high.

Description

technical field [0001] The invention belongs to the technical field of gas detection, and in particular relates to a method for detecting oil and gas leakage based on dual optical frequency comb spectrum technology. Background technique [0002] As a green energy widely used by humans at present, oil and gas have always been worried about the leakage problem in the process of exploitation, processing and transportation. Due to the flammable and explosive characteristics of methane (CH4), the main component of natural gas, once a leak occurs, it will seriously endanger the safety of the staff. Therefore, it is very important to quickly and effectively detect whether there is a natural gas leak for the development and production of oil and natural gas. significance. Although some leak detection methods already exist in actual production, such as detection equipment based on electrochemical and semiconductor technologies, these methods generally have problems such as low detec...

AI Technical Summary

Problems solved by technology

Although some leak detection methods already exist in actual production, such as detection equipment based on electrochemical and semiconductor technologies, these methods generally have problems such as low detection accuracy, long response time, and are susceptible to interference from other gases.

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