Portable infrared gas analyzer with automatic range calibration and calibration method

Abstract

The portable infrared gas analyzer with automatic range calibration provided by the present invention includes a preprocessing unit, an analysis unit, a main monitoring unit, a calibration unit and a correction unit, and the analysis unit includes a light source, an absorbing gas chamber and a receiving gas chamber, and the The light source generates infrared light and injects it into the absorbing gas chamber. The calibration unit performs zero point calibration and range calibration and sends the calibrated gas into the receiving gas chamber. The calibration unit calculates the deviation caused by the actual environmental change The measurement connection of the sample gas concentration can be automatically corrected by shifting increments; the invention can automatically correct the measurement results, which not only overcomes the influence of the measurement environment on the measurement, but also ensures the measurement accuracy of the system. It can be analyzed for a long time, saving cost and easy to carry.

Description

technical field [0001] The invention relates to the field of measurement and control, in particular to a portable infrared gas analyzer with automatic range calibration and a calibration method. Background technique [0002] A gas analyzer is a process analysis instrument that measures gas composition. In many production processes, especially in production processes with chemical reactions, automatic control based on physical parameters such as temperature, pressure, and flow is often not enough. Due to the wide variety of analyzed gases and the variety of analysis principles, there are many types of gas analyzers. Commonly used gas analysis methods mainly include: infrared absorption method, ultraviolet absorption method and Fourier transform infrared method. [0003] The Fourier transform infrared measuring instrument belongs to the principle of high-temperature measurement, which requires actual heat preservation treatment and an external auxiliary computing device. The...

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Problems solved by technology

[0006] In view of this, the present invention provides a portable infrared gas analyzer with automatic range calibration and a calibration method, which is used to solve the problem of the current portable analytical instruments using the principle of electrochemical analysis, which have low accuracy and resolution and high cost of use. , not easy to carry

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