Intelligent type infrared gas sensor

Abstract

An intelligent infrared gas sensor includes the chamber containing gas and exchanging gas with the outside, light source and at least one optoelectronic components, in which the light emitted by the said light source passes the chamber and arriving in the optoelectronic component, and the said optoelectronic component based on the intensity of the light to output the light intensity signal; its characteristic is that the sensor also includes: the signal processing circuit; the said signal processing circuit connects with the optoelectronic component for processing the said light intensity signal, and obtaining the measured gas concentration signal. Using this technology of the invention, the sensor can directly output the signal expressing gas concentration, and the sensor can be used independently, making application convenient and flexible; and using optimization program, it can reduce sensor size, improve the measurement accuracy, but also can measure more than one gas concentrations by requirement; at the same time, the intelligent sensor has self-diagnosis function.

Description

technical field [0001] The invention relates to a gas sensor, in particular to an intelligent infrared gas sensor. Background technique [0002] Gas detection is used in traditional industries such as earthquake prediction, mine safety, oil exploration, atmospheric physics, medical and health, pollution source monitoring, high-voltage equipment fault diagnosis, chemical process control, metallurgy, and even all new technologies such as biological science, microelectronics and new Materials and other fields have more and more extensive applications. [0003] The gas sensor is the core of the gas detection system and is usually installed in the detection head. In essence, a gas sensor is a converter that converts a certain gas volume fraction into a corresponding electrical signal. Gas sensors are usually classified according to their gas-sensing characteristics, which can be mainly divided into: semiconductor gas sensors, electrochemical gas sensors, solid electrolyte gas s...

AI Technical Summary

Problems solved by technology

[0016] The existing infrared gas sensor outputs an electrical signal, which is the light intensity signal of the light passing through the gas to be measured; in application, the electrical signal needs to be calculated externally to obtain the concentration of the gas to be measured signal, which is very inconvenient for applications; because it cannot be used independently, the range of use of infrared gas sensors is greatly limited

[0017] In addition, the light wave emitted by the light source must go through a long enough optical path, so that the gas to be measured can fully absorb the light wave, so that the measurement result is more accurate; therefore, the gas chamber in the infrared gas sensor often needs to reach a certain length, which not only makes the sensor volume too large , and the light intensity is not easy to be uniform, and it is more complicated to realize the gas exchange in the entire gas chamber, so the accuracy of the measurement will be affected; and the environmental moisture and dust will cause damage to the photoelectric components, which will reduce the measurement performance. This situation and temperature Variations can affect measurement accuracy

Images