Methane leak detection device

Abstract

The invention provides a methane leakage detection device. The detection device provided by the invention comprises a microprocessor circuit, an oblique wave generating circuit, a sine wave generating circuit, a summator, a laser, a sensor, a phase lock amplifying circuit, a filter circuit and an analog-digital conversion circuit, wherein the phase lock amplifying circuit, the filter circuit and the analog-digital conversion circuit are successively connected; the sensor comprises a laser signal receiver, and the output ends of the oblique wave generating circuit and the sine wave generating circuit are respectively connected with the input end of the summator; the microprocessor circuit is respectively connected with the oblique wave generating circuit and the sine wave generating circuit, and the output end of the summator is connected with the control end of the laser; the laser shot end of the laser is aligned with the laser signal receiver, and the output end of the laser signal receiver is connected with the input end of the phase lock amplifying circuit; and the microprocessor circuit is electrically connected with the reference signal input end of the phase lock amplifyingcircuit, and the analog-digital conversion circuit is connected with the microprocessor circuit and used for providing the detection data. The detection device provided by the invention has the advantages of high sensitivity, strong anti-interference capability, rapid reaction rate and less danger.

Description

technical field [0001] The invention relates to a gas concentration detection instrument, in particular to a methane leakage detection device. Background technique [0002] With the continuous development of the national economy, the demand for gas in industry, urban construction, and residents' life is also increasing, and the safe operation of urban gas has become increasingly important; how to strengthen the management of gas safety and prevent accidents before they happen is the key to gas The primary problem of the management of the transmission and distribution pipeline network; however, the current inspection system of the gas pipeline network needs to detect the gas concentration through a manually carried detector. The inspection workload is huge, and the manual inspection is easily damaged by toxic gases. [0003] In the prior art, FID is a gas chromatographic detection instrument sensitive to hydrocarbon gases, which is widely used in the detection of volatile hyd...

AI Technical Summary

Problems solved by technology

[0002] With the continuous development of the national economy, the demand for gas in industry, urban construction, and residents' life is also increasing, and the safe operation of urban gas has become increasingly important; how to strengthen the management of gas safety and prevent accidents before they happen is the key to gas The primary problem of the management of the transmission and distribution pipeline network; however, the current inspection system of the gas pipeline network needs to detect the gas concentration through a manually carried detector, the inspection workload is huge, and the manual inspection is easily damaged by toxic gases

[0003] In the prior art, FID is a gas chromatographic detection instrument sensitive to hydrocarbon gases, which is widely used in the detection of volatile hydrocarbons and many carbon-containing compounds; traditional FID needs a built-in gas pump, and needs to carry consumables such as carrier gas , although the detection speed is faster than manual detectors, it is still difficult to meet the needs of rapid detection

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