System for imaging detection of gas leakage based on broadband uncooled focal plane detector

Abstract

The invention relates to a system for imaging detection of gas leakage based on a broadband uncooled focal plane detector. The system comprises a broadband infrared optical lens, a narrow-band optical filter shifter, a broadband uncooled focal plane detector, an image processing module, a control module and a displayer. Positional relations of the above devices are that the broadband infrared optical lens, the narrow-band optical filter shifter, and the broadband uncooled focal plane detector are disposed in sequence along a light path of incident light, and meanwhile, the image processing module is connected with the broadband uncooled focal plane detector, the displayer is connected with the image processing module, and the control module is connected with the narrow-band optical filter shifter. The system for imaging detection of gas leakage uses a plurality of narrow-band filters with different central wavelengths to select the central wavelengths of infrared light which enters the broadband uncooled focal plane detector, so that the system can detect the infrared lights with different kinds of central wavelengths and realize detection effect of broadband.

Description

technical field [0001] The invention belongs to the technical field of gas detection, and in particular relates to a gas leakage imaging detection system based on a broadband uncooled focal plane detector. Background technique [0002] Leakage of harmful gases (such as liquefied natural gas, petroleum gas, ethylene, other industrial gases and liquefied substances harmful to organisms and the environment) not only pollutes the environment, but also directly affects social stability and the safety of people's lives and properties. Therefore, all countries in the world attach great importance to the research and instrument development of rapid and effective harmful gas leakage remote measurement or detection technology. [0003] Traditional gas sensors belong to point measurement, and can only perform fixed-point detection on gas storage tanks and transmission pipelines. It is time-consuming and labor-intensive to complete the entire detection, and it is difficult to achieve on...

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Problems solved by technology

[0005] In recent years, some people in China have proposed to apply uncooled focal plane detectors to the leakage detection of harmful gases, but their application methods are limited to the traditional working band (8~14 microns) of uncooled focal plane detectors, and some people use Adding a single narrow-band filter to a general-purpose infrared imaging system or adding or changing the coating of the protective window (infrared window) before the detector (patent publication number: CN102393375A) limits the uncooled focal plane detector to A fixed narrow-band working band, which greatly limits the application of this type of detector in the field of harmful gas leakage detection

Although compared with the refrigeration-type harmful gas leakage imaging detection system, the above application method reduces the product cost in the imaging detection of a single type of harmful gas, but in most cases, the actual application needs to detect multiple types of harmful gases. At this time, if Purchasing multiple sets of detection systems with the above-mentioned application methods will increase the application cost exponentially

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