Apparatus and method for measuring carbon monoxide concentration

Abstract

The invention relates to an apparatus and a method measuring the carbonmonoxide concentration. Firstly, the rotation of a rotating member causes a gas cell filled with pure carbon monoxide to correspond to a lightening component, and causes infrared light emitted by the lightening component to enter the gas cell filled with carbon monoxide, and then the light penetrating the gas cell passes through a light entering window and enters a multiple reflection cavity body, a reflex circuit of the multiple reflection cavity body sends the light to a light discharging window, the light is sent to a photoelectric conversion component after passing through a filtering component to form a corresponding first electrical signal related to the gas cell of the carbon monoxide, the rotating member rotates again to lead a gas cell filled with a second gas to correspond to the lightening component, so as to cause the light to pass through orderly the corresponding gas cell, the light entering window, the multiple reflection cavity body, the light discharging window, the filtering component, and the photoelectric conversion component to form a corresponding second electrical signal related to the cell gas of the second gas, at last, the carbonmonoxide concentration in the gas filled in the multiple reflection cavity body is calculated according to the second electrical signal and the first electrical signal, thereby realizing the precision measurement of the carbonmonoxide concentration.

Description

technical field [0001] The invention relates to an instrument and method for measuring carbon monoxide concentration. Background technique [0002] Research and practice at home and abroad have proved that carbon monoxide is a harmful gas that damages blood and nerves. Long-term exposure to low-concentration carbon monoxide will have a strong toxic effect on the human cardiovascular system and nervous system. The existence of carbon monoxide with variable concentration in the ambient air will also affect the quality of the ambient air. Therefore, monitoring the concentration of carbon monoxide in the ambient air is a necessary technical means to ensure the physical and mental health of the human body and to control environmental pollution. [0003] Nowadays, the methods for measuring carbon monoxide monitoring instruments in the environment mainly include infrared absorption spectroscopy, constant potential electrolysis, mercury replacement method and gas chromatography, am...

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Problems solved by technology

In addition, the photodetection characteristics of the photodetectors in the existing measuring devices will also change with temperature, which will have a serious impact on the measurement results.

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