TDLAS (Tunable Diode Laser Absorption Spectroscopy) measuring air chamber device simulating operating conditions of internal combustion engine

Abstract

The invention provides a TDLAS (Tunable Diode Laser Absorption Spectroscopy) measuring air chamber device simulating operating conditions of an internal combustion engine. The device comprises an absorption air chamber, carbon nanoparticles, a variable optical path system, a circulating system and a temperature control system, wherein the carbon nanoparticles are arranged in the absorption air chamber; the variable optical path system comprises guide rails, a rotary base, rotary knobs, nuts and a mirror cavity; the guide rails are arranged in the absorption air chamber face to face; the rotarybase is connected with the guide rails; the rotary knobs and the nuts are arranged on the base; the mirror cavity is formed in the nuts; visual windows are formed in two sides of the absorption air chamber; a tunable diode laser and a detector are respectively arranged in the visual windows; a He: Ne laser collimator and a power supply are arranged on one side of the detector. According to the device disclosed by the invention, temperature and pressure control is realized in the limited space, the particles are purged by utilizing the circulation device, the combustion conditions of the internal combustion engine are simulated, and the device is compact in whole design structure, reasonable and high-efficiency, and has extremely high similarity for simulating emission of the internal combustion engine.

Description

technical field [0001] The invention relates to a measuring gas chamber device, in particular to a TDLAS measuring gas chamber device for simulating the working condition of an internal combustion engine, and belongs to the field of diesel engines. Background technique [0002] In recent years, environmental issues have become the focus of people's increasing attention, especially with the introduction of green, energy-saving, low-carbon and other concepts, environmental awareness has become more and more popular, and we feel more and more that environmental issues are closely related to our daily life. Air pollution is particularly prominent in environmental issues, such as the growing greenhouse effect, global warming, melting glaciers, and rising sea levels. The shipbuilding industry developed rapidly at the end of the last century and the beginning of this century, and the discharge of pollutants from ships has become one of the focal issues of air pollution. In the fut...

AI Technical Summary

Problems solved by technology

Suitable for complex pollutant emission characteristics of marine diesel engines, it can realize high-precision online measurement of pollutant emission concentration, and can effectively solve the problem that existing test methods and instruments cannot achieve online measurement

[0003] TDLAS technology began in the mid-1960s and was first proposed by Hinkley and Reid et al. However, due to the limitation of laser manufacturing technology at that time, the test accuracy of TDLAS test technology was poor

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