Instrument for simultaneously monitoring the concentration of carbon monoxide and carbon dioxide

Abstract

It is a device to simultaneously monitor the concentration of the carbon monoxide and carbon dioxide and relates to diode laser spectrum application technique field, which comprises saw tooth wave generator 1, current controller 2, temperature controller 3, diode laser 4, first convex 5, second convex 6, detector 7 and computer, wherein, the output end of I is connected with input end of signal 2; the control output end of 2 is connected with current control end of 4; the output laser is input to the input end of 5 and is output by transmission of 5; the laser through the gas to be measured to the input end of 6; the data signal output end of 7 is connected with data input end of 8.

Description

Technical field: [0001] The invention relates to the technical field of diode laser spectrum application, in particular to an instrument for simultaneously monitoring the concentration of carbon monoxide and carbon dioxide. Background technique: [0002] At present, the technologies that can realize online gas monitoring mainly include differential absorption spectroscopy (DOAS) technology, laser radar (LIDAR) technology and diode laser spectroscopy technology. Among them, DOAS technology generally uses optical parametric oscillators as emission sources, but optical parametric oscillators are expensive, and this technology has high requirements for spectroscopic instruments and detection devices, so the cost of the entire set of equipment is very expensive. LIDAR technology is easily affected by the external environment. For example, the accuracy of its measurement will decrease with the increase of wind speed, and the maintenance cost of the equipment is high. Therefore, it...

AI Technical Summary

Problems solved by technology

Among them, DOAS technology generally uses optical parametric oscillators as emission sources, but optical parametric oscillators are expensive, and this technology has high requirements for spectroscopic instruments and detection devices, so the cost of the entire set of equipment is very expensive

LIDAR technology is easily affected by the external environment. For example, the accuracy of its measurement will decrease with the increase of wind speed, and the maintenance cost of the equipment is high. Therefore, it is rarely used for real-time monitoring of polluted gases, and is mainly used for general surveys of polluted gases.

At present, in the world, there have been reports on the use of diode laser spectroscopy to monitor the concentration of pollutant gases online, but most of them use a diode laser to measure the concentration of one gas, and some monitor the concentration of multiple gases at the same time. Number of Diode Lasers

This will increase the cost of gas concentration online monitoring equipment, and it is difficult to miniaturize

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