Gas detection device

Abstract

The invention aims at providing a gas detection device. The gas detection device particularly comprises an optical filter, a non-refrigeration infrared detector and an infrared lens, wherein a transmission wave section of the optical filter comprises an infrared absorption peak value wavelength containing corresponding a to-be-detected gas; the non-refrigeration infrared detector is used for acquiring and outputting infrared imaging information passing through the optical filter; the infrared lens is used for converging infrared rays of an object to the non-refrigeration infrared detector. Compared with the prior art, the gas detection device has the advantage that by combining the optical filter with the non-refrigeration infrared detector, the gas detection is achieved; compared with a gas detection device which utilizes infrared detectors such as a refrigeration infrared detector as a detector in the prior art, the gas detection device has the main beneficial technical effects that the refrigeration is omitted, the gas detection device is low in power consumption, small in size, rapid to start, convenient to carry, light, long in service life and low in cost, and the miniaturization is achieved; furthermore, a light path is simple and is easy to realize, and the production cost of equipment is further lowered and the like.

Description

technical field [0001] The present invention relates to the technical field of gas leakage detection, in particular to the technology of a gas detection device. Background technique [0002] Gas leak detection has always been one of the important topics in industrial production. The traditional method of detecting gas leakage is usually to turn off the equipment first, apply soapy water on the surface of the detection area, and determine the leakage point by observing whether there are bubbles. This method is more laborious and the detection accuracy is not high. The use of spectral imaging to detect gas leaks is a method that has developed rapidly in recent years. We know that according to Planck's law, objects radiate electromagnetic waves all the time at any temperature, so detectors sensitive to certain wavebands can be used to collect The radiation information in these bands is used to image objects. Using this principle, for some special gases, it can be known through...

AI Technical Summary

Problems solved by technology

Take the detection of sulfur hexafluoride gas (SF6) as an example. SF6 is a colorless and odorless gas. It is difficult to detect it with traditional methods and the effect is not good.

Because it has a strong absorption in the infrared band around 10.6 μm, it can be detected by using an infrared camera, but the absorption band of SF6 is very narrow, and it only has obvious absorption in the 10.5 μm ~ 10.7 μm band, while the general The uncooled thermal imager responds to the electromagnetic radiation in the 8μm ~ 14μm band, so the radiation absorbed by SF6 only accounts for a small part of the total radiation received by the thermal imager, which leads to leakage points The difference between the background and the background is very subtle, the contrast is poor, and it is easy to miss

Using some cooling detectors, such as Quantum Well Infrared Photodetector (QWIP, Quantum Well Infrared Photodetector), the response band of the detector can be adjusted so that it only responds to electromagnetic radiation in the vicinity of 10.5 μm to 10.7 μm, thereby Improve the detection contrast, but need to customize a special detector for each specific gas, which is inconvenient and expensive to produce

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