Miniaturized ozone monitor based on gas-sensitive semiconductor and monitoring method

Abstract

The invention discloses a miniaturized ozone monitor based on a gas-sensitive semiconductor and a monitoring method, and relates to the field of ozone monitoring. The monitor comprises an external pump, a first memory, an environment sensor, a logic controller and at least one ozone sensor, wherein the logic controller is connected with the external pump, the first memory, the environment sensor and each ozone sensor. The monitor is suitable for near-surface ozone monitoring, the ozone content in the environment can be conveniently and rapidly obtained, accurate ozone monitoring can be achieved on a miniaturized instrument, the requirement that the instrument normally works in a movable / fixed variable environment can be met, and the monitor has the advantage of being accurate in measurement.

Description

technical field [0001] The invention relates to the field of ozone monitoring, in particular to a gas-sensitive semiconductor-based miniaturized ozone monitor and a monitoring method. Background technique [0002] At present, the in-situ measurement of commonly used ozone is usually based on ultraviolet photometry and electrochemical methods. The ultraviolet photometry is observed by a special laboratory observation instrument, which is usually fixed in the laboratory for ambient ozone observation, and the air pump is pumped from the outside to the instrument for measurement. Ultraviolet photometry requires a long enough absorption path to achieve high measurement accuracy. Miniaturized instruments are usually limited by the length of the optical path and the measurement accuracy fluctuates greatly. In addition, the absorption cross section of ozone molecules is affected by temperature and pressure, and it is usually difficult to control the temperature of miniaturized inst...

AI Technical Summary

Problems solved by technology

Ultraviolet photometry requires a long enough absorption path to achieve high measurement accuracy. Miniaturized instruments are usually limited by the length of the optical path and the measurement accuracy fluctuates greatly.

In addition, the absorption cross section of ozone molecules is affected by temperature and pressure, and it is usually difficult to control the temperature of miniaturized instruments, resulting in large fluctuations in values

Therefore, UV photometry is difficult to achieve accurate ozone monitoring on small instruments

[0003] The electrochemical method requires an electrolytic cell, and the space of the electrolytic cell is limited, which determines that this method cannot be used for long-term measurement. Generally, it is only used for one-time vertical profile measurement of ozone. The duration is generally not more than 2 hours, and the solution in the electrolytic cell It is obviously affected by temperature, it is easy to condense at low temperature, and requires heating and heat preservation treatment, which makes it difficult to achieve accurate ozone monitoring on small instruments

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