Portable gas detection analyzer with temperature and humidity compensation function

Abstract

The invention provides a portable gas detecting and analysing instrument with temperature and humidity compensation function, which belongs to gas detecting and analysing field. It discloses a portable CO and CH4 gas detecting analysing instrument with a temperature and humidity compensation function. The instrument includes a control circuit and the circuits connected with it including the gas sensor detecting circuit, temperature detecting circuit, humidity detecting circuit, LCD circuit, acousto -optical alarming circuit, data storing circuit, PC communication interface circuit, timing circuit, heating control circuit and the power circuit. The gas detecting instrument in the invention can real-time detecte CO and CH4 content in the detected gas and the change of the environmental temperature and humidity and store the test data, time and environmental information into the memory for further analysis with computer and make the temperature and humidity compensation, collect, manage and keep the test information for retrieving. The instrument can be applied to detection of environment and gas content in mine and regions abundant of fuel gas such as CO and CH4, etc.

Description

technical field [0001] The invention belongs to the technical field of gas detection and analysis. It involves a gas detection analyzer with temperature and humidity compensation function, especially for the two main flammable and explosive gases CO, CH in mines 4 Detection, identification and quantification of reducing gases and their mixtures. Background technique [0002] Most of the gas detection instruments currently used are only for one kind of gas, and the temperature and humidity compensation is mostly realized by the differential pair method, that is, a sensor that is exactly the same as the gas sensor used, does not respond to ambient gas, but is only affected by temperature and humidity. The corresponding signal with the actual gas sensor constitutes the two ends of the differential circuit so as to eliminate the influence of temperature and humidity. At present, the effect of this structure on temperature is relatively easy to realize, as long as the sensor is...

AI Technical Summary

Problems solved by technology

At present, the influence of this structure on temperature is relatively easy to realize, as long as the sensor is sealed, but it is more difficult to compensate for humidity. It is necessary to make a molecular isolation sieve that only allows water molecules to pass through, which leads to the complexity of humidity compensation. thereby increasing the cost

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